CN113834195B

CN113834195B - Household appliance and motor control method, device and storage medium thereof

Info

Publication number: CN113834195B
Application number: CN202111037462.7A
Authority: CN
Inventors: 霍军亚; 朱家辉
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Chongqing Midea Refrigeration Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Chongqing Midea Refrigeration Equipment Co Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-09-30
Anticipated expiration: 2041-09-06
Also published as: CN113834195A

Abstract

The application discloses a household appliance and a motor control method, a device and a storage medium thereof, wherein the method can control the household appliance to perform steering detection by acquiring a motor steering detection instruction; driving the motor to operate in a forward direction and a reverse direction; acquiring the first power of forward operation and the second power of reverse operation, determining a target operation direction of the motor according to the first power and the second power, or acquiring a first wind power of forward operation and a second wind power of reverse operation at a preset position, and determining the target operation direction of the motor according to the first wind power and the second wind power; the motor is controlled to run according to the target running direction, so that the universal matching performance of the household appliance can be improved, the direction of the electric control board and the motor does not need to be preset, the motor of the household appliance is automatically controlled to run in a positive sequence or a negative sequence, and the requirement of correct air supply of the household appliance is met. The method and the device can be widely applied to the technical field of household appliances.

Description

Household appliance and motor control method, device and storage medium thereof

Technical Field

The invention relates to the technical field of household appliances, in particular to a household appliance, a motor control method and device thereof, and a storage medium.

Background

With the improvement of the social living standard and the rapid development of science and technology, household appliances become important components of the indoor environment of people, and are widely applied to various aspects of life such as families, markets, workplaces and the like. The motor that the household electrical appliances of correlation technique used is the synchronous three-phase AC motor of permanent magnetism, the automatically controlled Microcontroller (MCU) of air conditioner drives Intelligent Power Module (IPM) output three-phase voltage in the in-service use, the synchronous three-phase AC motor operation of permanent magnetism of IPM module drive, the motor drives the wind wheel and rotates, and different product structures, though use the same automatically controlled board, nevertheless because the mounted position of air conditioner motor is different, lead to the relative position difference of wind wheel and motor, consequently, need driving motor to turn to the difference, thereby lead to unable product commonality and the demand of after sale commonality of satisfying.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a household appliance, a motor control method and device thereof, and a storage medium.

According to a first aspect of the present invention, a motor control method for a household electrical appliance is provided, in which a motor drives a wind wheel to rotate, the method includes:

acquiring a motor steering detection instruction, and controlling the household appliance to perform steering detection;

driving the motor to operate in a forward direction and a reverse direction;

obtaining the first power of forward operation and the second power of reverse operation, and determining the target operation direction of the motor according to the first power and the second power, or

Acquiring a first wind power running in a forward direction and a second wind power running in a reverse direction at a preset position, and determining a target running direction of the motor according to the first wind power and the second wind power;

and controlling the motor to operate according to the target operation direction.

According to some embodiments of the invention, the obtaining the motor steering detection command comprises at least one of:

acquiring the detection instruction through a remote controller of the household appliance;

or the detection instruction is obtained through a key of the household appliance;

or the detection instruction is obtained through a mobile terminal associated with the household appliance.

According to some embodiments of the invention, the controlling the home device to enter a steering detection mode comprises: controlling the motor to run at a predetermined speed.

According to some embodiments of the invention, the method further comprises:

and controlling the intelligent power module to drive the motor to operate by adopting a micro-control unit.

According to some embodiments of the present invention, when the motor is operated in a forward direction, the controlling, by the micro control unit, the intelligent power module to drive the motor to operate includes: the micro control unit is adopted to control the intelligent power module to output alternating voltage to drive the motor to operate; the three-phase sequence of the alternating voltage comprises one of:

the three phases of the alternating voltage are ordered to be a U phase, a V phase and a W phase in sequence;

or the three phases of the alternating voltage are sequenced into a V phase, a W phase and a U phase in sequence;

or the three phases of the alternating voltage are sequentially arranged into a W phase, a U phase and a V phase.

According to some embodiments of the invention, the intelligent power module outputs an alternating voltage to drive the motor to operate; when the motor runs in the reverse direction, the intelligent power module outputs at least one of the following three-phase sequences of alternating voltages:

the three phases of the alternating voltage are sequentially arranged into a U phase, a W phase and a V phase;

or the three phases of the alternating voltage are sequenced into a V phase, a U phase and a W phase in sequence;

or the three phases of the alternating voltage are sequentially arranged into a W phase, a V phase and a U phase.

According to some embodiments of the invention, before said obtaining said first power of forward operation and said second power of reverse operation, said method further comprises the steps of:

detecting the direct-current bus voltage of the intelligent power module;

determining the three-phase voltage of the alternating-current voltage according to the direct-current bus voltage;

detecting three-phase current of the intelligent power module;

and calculating the first power and the second power according to the three-phase voltage and the three-phase current.

According to some embodiments of the invention, the detecting the three-phase alternating current of the smart power module comprises at least one of the following detection methods:

detecting by adopting a sensor in a time-sharing manner to obtain three-phase current;

or two sensors are adopted to detect the currents of two phases, and the current of the third phase is calculated according to the currents of the two phases;

or three sensors are adopted to respectively detect the current of one phase, so that the three-phase current is obtained.

According to some embodiments of the invention, the determining the target direction of operation of the electric machine from the first power and the second power comprises at least one of:

determining an operation direction corresponding to a larger value of the first power and the second power as a target operation direction of the motor;

or comparing the first power or the second power with a predetermined power value, wherein the corresponding running direction which is greater than the predetermined power value is taken as the target running direction of the motor.

According to some embodiments of the invention, the determining the target direction of operation of the electrical machine from the first and second winds comprises at least one of:

determining an operation direction corresponding to a larger value of the first wind power and the second wind power as a target operation direction of the motor;

or comparing the first wind force and the second wind force with a preset wind force value, wherein the corresponding running direction which is greater than the preset wind force value is taken as the target running direction of the motor.

According to another aspect of the present invention, a motor control device for a household electrical appliance, the motor driving a wind wheel to rotate, the device includes:

the acquisition module is used for acquiring a motor steering detection instruction and controlling the household appliance to perform steering detection;

the driving module is used for driving the motor to operate in a forward direction or a reverse direction;

the first obtaining and determining module is used for obtaining the first power of forward operation and the second power of reverse operation, and determining a target operation direction of the motor according to the first power and the second power; or

The second obtaining and determining module is used for obtaining the first wind power running in the forward direction and the second wind power running in the reverse direction at a preset position, and determining the target running direction of the motor according to the first wind power and the second wind power;

and the control module controls the motor to operate according to the target operation direction.

A control apparatus according to another aspect embodiment of the present invention includes:

at least one processor;

at least one memory for storing at least one program;

when executed by at least one of the processors, causes the at least one processor to implement the method as previously described.

According to another aspect of the embodiment of the invention, the household appliance comprises a compressor and the motor control device of the household appliance or the control device.

According to another aspect of the present invention, a computer readable storage medium has stored thereon a program executable by a processor, the program being for implementing the method as described above when executed by the processor.

According to the embodiment of the invention, the household appliance can be controlled to carry out steering detection by acquiring the motor steering detection instruction; driving the motor to operate in a forward direction and a reverse direction; acquiring the first power of forward operation and the second power of reverse operation, determining a target operation direction of the motor according to the first power and the second power, or acquiring a first wind power of forward operation and a second wind power of reverse operation at a preset position, and determining the target operation direction of the motor according to the first wind power and the second wind power; the motor is controlled to run according to the target running direction, so that the universal matching performance of the household appliance can be improved, the electric control board and the motor do not need to be preset in direction, the motor of the household appliance is automatically controlled to run in the forward direction or the reverse direction, and the requirement of correct air supply of the household appliance is met.

Additional aspects and features of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present application or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic hardware structure diagram of a home appliance according to embodiments of the present application;

fig. 2 is a schematic circuit structure diagram of a motor driving system of a home appliance according to an embodiment of the present application;

fig. 3 is a schematic flowchart illustrating steps of a motor control method of a home appliance according to an embodiment of the present application;

fig. 4 is a schematic circuit diagram of a motor driving system of another household appliance according to an embodiment of the present application;

fig. 5 is a schematic circuit diagram of a motor driving system of another household appliance according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a motor of a household appliance installed below a wind wheel in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a motor of a household appliance installed above a wind wheel in the embodiment of the present application;

fig. 8 is a schematic structural diagram of a motor control device of a household electrical appliance in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a control device in an embodiment of the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

First, the terms of the related nouns referred to in the embodiments of the present application are introduced and explained:

a rectifier bridge stack: refers to an ac-dc rectifier device in a household appliance driving system.

Ipm (intelligent Power module): the intelligent power module is an intelligent power module in an electric control board of household electrical appliance equipment.

Mcu (microcontroller unit): refers to a microcontroller module in an electric control board of household electrical appliance equipment.

In the related art, referring to fig. 2, after a driving system of a household appliance (e.g., a variable frequency air conditioner, a fresh air system, etc.) is connected to a power supply from a mains supply, AC-dc rectification is performed to convert AC into dc, and dc-AC inversion is performed to convert the dc into three-phase AC, so as to drive a motor 13 of a compressor to operate. The driving system comprises a rectifier bridge stack 11 and an Intelligent Power Module (IPM)12, an AC power supply is rectified by the rectifier bridge stack 11 and then is changed into a direct current, and the voltage of the direct current fluctuates along with the AC power supply. After the direct current is subjected to capacitance filtering by EC1, the direct current with voltage fluctuating along with an alternating current power supply is converted into smooth direct current voltage, and the smooth direct current voltage is supplied to the intelligent power module. The microcontroller module 4 collects the direct-current bus voltage of the intelligent power module through the voltage monitoring unit, so that the Intelligent Power Module (IPM)12 is controlled to output three-phase alternating-current voltage through the path, the three-phase alternating-current voltage drives a motor of the compressor to operate, and the motor 13 can be a permanent magnet synchronous motor. The microcontroller module collects phase current of the motor through the current detection unit I, and the motor is electrically connected with the wind wheel so as to drive the wind wheel to rotate. However, since the electric control board of the driving system in the related art is fixed, the same electric control board is required to be used for driving the motor, and the installation positions of the wind wheel relative to the motor are different, referring to fig. 6, the wind wheel is installed above the motor in some household appliances, referring to fig. 7, and the wind wheel is installed above the motor in some household appliances. For a floor type air conditioner indoor unit, a motor can be arranged below a wind wheel or above the wind wheel, and the two installation methods need the motor to rotate in opposite directions. The two mounting modes are different corresponding to the rotation directions of the motor, however, the structure of the electric control board is fixed, and the self-adaptive adjustment of the motor steering is lacked, so that the requirements of product universality and after-sale universality cannot be met.

Based on this, the embodiment of the application provides a household appliance, a motor control method, a motor control device and a storage medium thereof, and firstly, the household appliance can be controlled to perform steering detection by acquiring a motor steering detection instruction; driving the motor to operate in a forward direction and a reverse direction; acquiring the first power of forward operation and the second power of reverse operation, determining a target operation direction of the motor according to the first power and the second power, or acquiring a first wind power of forward operation and a second wind power of reverse operation at a preset position, and determining the target operation direction of the motor according to the first wind power and the second wind power; the motor is controlled to run according to the target running direction, so that the universal matching performance of the household appliance can be improved, the direction of the electric control board and the motor does not need to be preset, the motor of the household appliance is automatically controlled to run in a positive sequence or a negative sequence, and the requirement of correct air supply of the household appliance is met.

Referring to fig. 1, fig. 1 is a hardware structure diagram of a home appliance according to embodiments of the present application. In this embodiment, the home device may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, an input port 1003, an output port 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the input port 1003 is used for data input; the output port 1004 is used for data output, the memory 1005 may be a high-speed RAM memory, or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration shown in FIG. 1 is not limiting of the present application and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

With continued reference to fig. 1, the memory 1005 of fig. 1, which is a readable storage medium, may include an operating system, a network communication module, an application program module, and a control program of the electric home appliance. In fig. 1, the network communication module is mainly used for connecting to a server and performing data communication with the server; the processor 1001 may call the control program of the home appliance stored in the memory 1005, and execute the motor control method of the home appliance according to the embodiment of the present disclosure.

Referring to fig. 2, fig. 2 is a schematic circuit structure diagram of a driving system of a home appliance according to embodiments of the present application. In this embodiment, the driving system may include a bridge rectifier 11, an Intelligent Power Module (IPM)12, a capacitor EC1, a motor 13 of the compressor, and a microcontroller Module (MCU)14, where an AC power source is connected to the bridge rectifier 11 of the driver, and an AC power source is rectified by the bridge rectifier 11 and then converted into a dc power, and the voltage of the dc power fluctuates along with the AC power source. Resistor elements R1 and R2 and a capacitor EC1 which are connected in series are also connected between the rectifier bridge stack 11 and the intelligent power module. The dc power is filtered by an EC1 capacitor, and the dc power whose voltage fluctuates with the ac power supply is converted into a smooth dc voltage, which is supplied to an Intelligent Power Module (IPM) 12. The motor 13 is connected with U, V, W three phases of an Intelligent Power Module (IPM)12, and a microcontroller Module (MCU)14 is used to drive the intelligent power module 2, so as to invert the direct current into a three-phase alternating current to drive the motor 13 of the compressor to operate. The microcontroller Module (MCU)14 controls a voltage detection unit (R) connected between the resistance elements R1 and R2 for collecting the voltage rectified by the rectifier bridge 11, i.e., the dc bus voltage of the Intelligent Power Module (IPM)12, the microcontroller Module (MCU)14 collects the dc bus voltage, which is represented as UR2 by collecting the voltage at the midpoint between R1 and R2, and calculates the dc bus voltage according to the formula (1):

wherein, for 220V AC power supply, the voltage of the bus after AC-DC rectification is 310V, the DC bus capacitor usually selects 450V voltage-resistant class, generally U _dc The detection range of (2) is more than 450V, R ₁ /R ₂ The ratio is preferably 100, R ₁ Recommended settings are 1M ohm and R ₂ Preferably set to 10K ohms.

It will also be appreciated that the voltage of the AC power source, the DC bus capacitance, R ₁ /R ₂ Ratio and R ₁ 、R ₂ Can be set according to the specific conditions of the household electrical applianceSetting conditions; specifically, the voltage of the ac power supply, the dc bus capacitance, R, etc. may be varied according to the performance, operation mode, etc. of the household electrical appliance ₁ /R ₂ Ratio and R ₁ 、R ₂ The voltage of the AC power supply is set to 220V, and the DC bus capacitor is selected to be 450V, R ₁ /R ₂ Ratio selection 100 and R ₁ 、R ₂ The selection of 1M ohm and 10K ohm, respectively, is for exemplary purposes only.

The microcontroller Module (MCU)14 also controls a current detection unit (ii) for detecting the three-phase current of the motor. Symbol (c) in fig. 2 is used to indicate that the microcontroller Module (MCU)14 drives the transistors S1-S6 in the Intelligent Power Module (IPM)12, and drives the transistors S1-S6 to realize the driving of the three-phase voltage of the Intelligent Power Module (IPM) 12.

The motor power of the compressor can be calculated by the three-phase voltage and the three-phase current of the motor, and is obtained according to the following formula (2):

P _motor ＝u _u i _u +u _v i _v +u _w i _w (2)

wherein, P _motor For compressor motor power, u _u 、u _v 、u _w U, v, w three-phase voltages, i, of the compressor motor _u 、i _v 、i _w The three-phase currents of the motor u, the motor v and the motor w of the compressor are respectively.

The motor power of the compressor can also be calculated by the dq axis voltage and current of the dq axis system, as shown in the following formula (3):

P _motor ＝u _q i _q +u _d i _d (3)

wherein u is _d 、u _q The dq-axis voltage, i, of the compressor motor _d 、i _q The compressor motor dq axis currents, respectively.

Those skilled in the art will appreciate that the circuit configuration shown in fig. 2 is not limiting of the present application and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

Based on the hardware structure shown in fig. 1 and the circuit structure shown in fig. 2, an embodiment of the present application provides a method for controlling a motor of a home appliance, and specifically, referring to fig. 3, fig. 3 is a schematic step flow diagram of the method for controlling the motor of the home appliance provided in the embodiment of the present application. As shown in fig. 3, the method includes steps S110 to S150:

s110, obtaining a motor steering detection instruction, and controlling the household appliance to perform steering detection;

in this step, generally, after the home appliance is turned on, the detection instruction may be obtained through a remote controller of the home appliance; or acquiring a detection instruction through a key of the household appliance; or the detection instruction is obtained through a mobile terminal associated with the household appliance. And after the detection instruction is acquired, controlling the household appliance to perform steering detection according to the detection instruction. It should be noted that after the detection instruction is obtained, the home appliance device may directly run the control steps of the control method, and may also set a steering detection mode for the home appliance device, that is, after the home appliance device is turned on, the detection instruction is obtained through a path that the home appliance device can take, the home appliance device enters the steering detection mode, in this mode, the target running direction of the motor is determined according to the control method of the embodiment of the present application, and then the home appliance device exits the steering detection mode, and the target running direction determined in the steering detection mode of the home appliance device controls the motor to run. It is understood that the home appliance may remind the user that the home appliance enters the detection or the detection is completed (i.e. the target running direction of the motor is determined) by controlling any one of the blinking of the indicator light or the sounding of the buzzer.

It is also understood that the detection instruction may be obtained in other manners as long as the home appliance can obtain the detection instruction, and the remote controller, the home appliance keys, and the mobile terminal associated with the home appliance in the embodiment of the present application are only exemplary for obtaining the detection instruction, and are not specific to the detection instruction.

It is worth to be noted that, the controlling the home appliance to perform the steering detection includes: the motor is controlled to run at a predetermined speed. The motor runs at a predetermined speed, which may mean that the rotation speed of the motor is a predetermined speed, wherein the rotation speed of the motor is determined according to the model of the household appliance and user setting parameters, and generally, the rotation speed range of the motor of the household appliance is usually between 150rpm and 3000 rpm. It will be appreciated that after controlling the motor to operate at a predetermined speed, it takes a certain amount of time for the motor to reach and stabilize operating at the predetermined speed.

It can also be understood that the motor speed range setting of the household appliance can be set according to the specific situation of the household appliance; specifically, the motor rotation speed range of the corresponding home appliance device may be different according to different performances, working modes, and the like of the home appliance device, and in the embodiment of the present application, the setting of the motor rotation speed range of the home appliance device to be between 150rpm and 3000rpm is only an exemplary description of the motor rotation speed range of the home appliance device.

S120, driving the motor to operate in the forward direction and the reverse direction;

in this step, as shown in fig. 2, a microcontroller Module (MCU)14 is used to control the operation of the driving motor of the intelligent power module 2. The U/V/W three-phase arrangement of the motor is shown in Table 1, wherein three are positive sequences, and three are negative sequences:

TABLE 1

U	V	W	Positive sequence
				V	W	U	Positive sequence
W	U	V	Positive sequence
				U	W	V	Reverse order
W	V	U	Reverse order
				V	U	W	Reverse order

The driving system on a control panel of the household appliance device, the microcontroller Module (MCU)14 can control which sort the intelligent power module 2 outputs, so that the three-phase voltage of the driving motor can be arranged according to 6 kinds in the table 1. Three of the U/V/W phase sequences are arranged in a positive sequence, and the other three are arranged in a reverse sequence. When the three phases are arranged in a positive sequence, the driving system drives the motor to operate in a positive direction, and when the three phases are arranged in a reverse sequence, the driving system drives the motor to operate in a reverse direction. For example, when the three-phase voltage of the motor is 3 arrangements in the positive sequence in table 1, the driver controls the motor to operate in the correct direction, and when the motor is 3 arrangements in the reverse sequence in table 1, the motor may operate in the reverse direction.

Specifically, an Intelligent Power Module (IPM) of the driving system outputs alternating current voltage to drive a motor to operate; firstly, the driving motor operates in a forward direction, an Intelligent Power Module (IPM) outputs alternating-current voltage, and the three-phase sequence of the alternating-current voltage comprises one of the following steps:

three phases of alternating voltage are sequenced into a U phase, a V phase and a W phase in sequence;

or three phases of the alternating voltage are sequenced into a V phase, a W phase and a U phase in sequence;

Specifically, an Intelligent Power Module (IPM) outputs alternating current voltage to drive a motor to operate; when the motor is running in reverse, the Intelligent Power Module (IPM) outputs a three-phase sequence of at least one of the following AC voltages: three phases of alternating voltage are sequenced into a U phase, a W phase and a V phase in sequence; or three phases of the alternating voltage are sequenced into a V phase, a U phase and a W phase in sequence; or the three phases of the alternating voltage are sequentially W phase, V phase and U phase.

It can be understood that the driving system outputs three-phase sequenced different alternating-current voltages through the intelligent power module to drive the motor to operate, so that the operation of the motor can be controlled more easily, and a way is provided for subsequent improved control.

S130, acquiring the first power of forward operation and the second power of reverse operation, and determining a target operation direction of the motor according to the first power and the second power;

before this step, the motor control method for the household electrical appliance further includes: firstly, detecting the direct current bus voltage of an Intelligent Power Module (IPM) 12; then determining the three-phase voltage of the alternating-current voltage according to the voltage of the direct-current bus; then detecting the three-phase current of an Intelligent Power Module (IPM) 12; and finally, calculating the first power and the second power according to the three-phase voltage and the three-phase current.

Specifically, the microcontroller Module (MCU)14 collects the dc bus voltage by collecting the voltage UR2 at the midpoint between the resistor R1 and the resistor R2, and determines the three-phase voltage u of the motor according to the dc bus voltage Udc by calculating the dc bus voltage Udc according to the formula (1) _u 、u _v 、u _w . The acquisition of the three-phase current of the motor is controlled according to a microcontroller Module (MCU) 14. Specifically, the microcontroller Module (MCU)14 may detect and collect three-phase currents of the motor through a current detection sensor, which may employ a current transformer or a resistor, and convert a current signal into a voltage signal and transmit the voltage signal to the microcontrollerAnd an AD detection port of the Module (MCU)14, wherein the MCU realizes the conversion from an analog voltage signal to a digital signal through an AD unit, thereby obtaining the three-phase current of the motor. Referring to fig. 2, a current detection sensor may be used, and the current detection sensor collects currents in a time-division multiplexing manner, and obtains three-phase currents through current reconstruction. Referring to fig. 4, two current detecting sensors may be used to collect the currents of two phases of the current detecting sensors according to the formula i _w ＝-(i _u +i _v ) The current of the third phase is calculated. Referring to fig. 5, three current detection sensors may be used to respectively collect three-phase currents.

Specifically, the microcontroller Module (MCU)14 controls the Intelligent Power Module (IPM)12 to select a positive sequence three-phase sequence to drive the motor to operate in the forward direction, and then the three-phase voltage and the three-phase current are obtained by the above method, and the first power P during the forward operation of the motor is calculated by the formula (2) _motor1 . The microcontroller Module (MCU)14 then controls the Intelligent Power Module (IPM)12 to select an inverse three-phase sequence, which is then used to derive P in the same way as the first power _motor2 。

It can also be understood that the detection mode setting of the three-phase voltage and the three-phase current can be set according to the specific situation of the household appliance driver; specifically, the corresponding detection modes may be different according to different performances, working modes, and the like of the home appliance, and the detection modes in the embodiments of the present application are only exemplary.

In the embodiment of the application, the target operation direction of the motor is determined according to the first power and the second power, and the operation direction corresponding to the larger value of the first power and the second power can be determined as the target operation direction of the motor. Specifically, the comparison of the first power P is adopted because the motor power is smaller than the power in the correct direction when the wind wheel is in the wrong direction of rotation _motor1 And a second power P _motor2 The correct direction of the motor running is determined by the size of the motor, and the larger value of the two corresponds to the correct direction of the motor running, namely the target running direction.

In this embodiment of the application, the target operation direction of the motor is determined according to the first power and the second power, and the first power or the second power may be compared with a predetermined power value, where a corresponding operation direction larger than the predetermined power value is taken as the target operation direction of the motor. The predetermined power value may be determined based on an operating power value of the motor at a predetermined speed, for example, a value slightly smaller than the operating power value at the predetermined speed is determined as the predetermined power value.

It is also understood that the setting of the determination mode for determining the target operation direction by the values of the first power and the second power may be set according to the specific situation of the motor of the household appliance; specifically, the corresponding determination method may be different according to different performances, working modes, and the like of the home appliance, and the determination method in the embodiment of the present application is only described as an example.

In the embodiment of the present application, the motor control method of the home appliance may determine the target operation direction through step 130 or determine the target operation direction through step 140, where "or" indicates:

1. the motor control method of the household appliance can determine the target running direction through the

steps

130 and 140;

2. the motor control method of the home appliance may determine a target operation direction through step 130;

3. the motor control method of the home appliance may determine the target operation direction through step 140.

Wherein:

s140, acquiring a first wind power running in the forward direction and a second wind power running in the reverse direction at a preset position, and determining the target running direction of the motor according to the first wind power and the second wind power.

In the embodiment of the application, a wind force detection device and a wind direction detection device can be arranged at a position away from the wind wheel, or the sizes of the first wind force running in the forward direction and the second wind force running in the reverse direction can be artificially determined.

In the embodiment of the application, the wind power detection device can be arranged at the preset position to measure the wind power value when the motor runs.

In the embodiment of the application, the wind direction detection device can be designed with an automatic closing structure similar to exhaust and is assisted to realize wind direction detection by a detection switch. When the wind wheel stops running, the wind direction detection device returns to a closed position under the action of weight, and after the fan is started, if the motor runs in the positive direction, the wind wheel is driven to rotate at a higher speed, and the structure can be blown to an open position under the action of wind power; if the motor runs in the reverse direction, the wind direction detection device cannot be blown to the opening position after the wind wheel turns reversely, so that the forward running and the reverse running can be distinguished.

It is also understood that the setting by means of determining the wind power can be set according to the specific situation of the motor of the household appliance; specifically, the corresponding determination method may be different according to the performance, the operation mode, and the like of the home appliance, and the provision of the wind force detection device, the wind direction detection device, or the human determination method in the embodiment of the present application is merely described as an example.

In the embodiment of the application, the running direction corresponding to the larger value of the first wind power and the second wind power can be determined as the target running direction of the motor. Specifically, when the wind wheel has a wrong operation direction, the rotation speed of the wind wheel is smaller than the rotation speed in the correct direction, so the correct direction of the motor operation is determined by comparing the first wind power and the second wind power, and the larger value of the first wind power and the second wind power corresponds to the correct direction of the motor operation, namely the target operation direction.

In the embodiment of the present application, the first wind force and the second wind force may be compared with a predetermined wind force value, wherein the corresponding operation direction greater than the predetermined wind force value is used as the target operation direction of the motor. The predetermined wind force value may be determined based on an operating wind force value of the motor at a predetermined speed, for example, a value slightly smaller than the operating wind force value at the predetermined speed is determined as the predetermined wind force value.

The motor control method of the household appliance in the embodiment of the application can judge the correct running direction by controlling the forward running and the reverse running of the motor and comparing the running power under two conditions or the wind power of the wind wheel, so that the correct running direction of the motor can be determined before the normal running of the household appliance.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a motor control device of a household electrical appliance in an embodiment of the present application, where a motor drives a wind wheel to rotate, and the device further includes:

the acquiring module 101 is used for acquiring a motor steering detection instruction and controlling the household appliance to perform steering detection;

the driving module 102 is used for driving the motor to operate in a forward direction or a reverse direction;

the first obtaining and determining module 103 is configured to obtain the first power of the forward operation and the second power of the reverse operation, and determine a target operation direction of the motor according to the first power and the second power; or

A second obtaining and determining module 104, configured to obtain the first wind power in the forward operation and the second wind power in the reverse operation at a predetermined position, and determine a target operation direction of the motor according to the first wind power and the second wind power;

and the control module 105 is used for controlling the motor to operate according to the target operation direction.

It is to be noted that "or" therein includes the following cases: the motor control device of the household appliance comprises a first acquisition determining module 103 and a second acquisition determining module 104; the motor control device of the household appliance comprises a first obtaining and determining module 103; the motor control apparatus of the home device includes a second acquisition determination module 104.

It can be seen that the contents in the foregoing method embodiments are all applicable to this apparatus embodiment, the functions specifically implemented by this apparatus embodiment are the same as those in the foregoing method embodiment, and the advantageous effects achieved by this apparatus embodiment are also the same as those achieved by the foregoing method embodiment.

Referring to fig. 9, an embodiment of the present application provides a control apparatus, including:

at least one processor 201;

at least one memory 202 for storing at least one program;

the at least one program, when executed by the at least one processor 201, causes the at least one processor 201 to implement the aforementioned motor control method of the home appliance.

Similarly, the contents of the method embodiments are all applicable to the apparatus embodiments, the functions specifically implemented by the apparatus embodiments are the same as the method embodiments, and the beneficial effects achieved by the apparatus embodiments are also the same as the beneficial effects achieved by the method embodiments.

The embodiment of the application also provides household electrical appliance which comprises a compressor and the motor control device of the household electrical appliance or the control device.

Similarly, the contents in the foregoing method embodiments are all applicable to the present household appliance embodiment, the functions specifically implemented in the present household appliance embodiment are the same as those in the foregoing method embodiments, and the beneficial effects achieved by the present household appliance embodiment are also the same as those achieved by the foregoing method embodiments.

The embodiment of the present application also provides a computer-readable storage medium, in which instructions executable by the processor 201 are stored, and the instructions executable by the processor 201 are used for executing the control method of the air conditioner as described above when executed by the processor 201.

Similarly, the contents in the foregoing method embodiments are all applicable to this storage medium embodiment, the functions specifically implemented by this storage medium embodiment are the same as those in the foregoing method embodiments, and the beneficial effects achieved by this storage medium embodiment are also the same as those achieved by the foregoing method embodiments.

In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.

Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and/or features may be integrated in a single physical device and/or software module, or one or more of the functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer given the nature, function, and interrelationships of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A motor control method of household electrical appliance is characterized in that a motor drives a wind wheel to rotate, and the method comprises the following steps:

driving the motor to operate in a forward direction and a reverse direction;

controlling the motor to operate according to the target operation direction;

wherein:

the determining the target operation direction of the motor according to the first power and the second power comprises the following steps:

determining an operation direction corresponding to a larger value of the first power and the second power as a target operation direction of the motor, or

Comparing the first power or the second power with a preset power value, wherein the corresponding running direction which is larger than the preset power value is taken as the target running direction of the motor;

the determining the target operation direction of the motor according to the first wind force and the second wind force comprises the following steps:

determining an operating direction corresponding to a larger value of the first wind force and the second wind force as a target operating direction of the motor, or

And comparing the first wind force and the second wind force with a preset wind force value, wherein the corresponding running direction which is greater than the preset wind force value is taken as the target running direction of the motor.

2. The method of claim 1, wherein the obtaining of the motor steering detection command comprises at least one of:

3. The method for controlling the motor of the home appliance according to claim 1, wherein the controlling the home appliance to perform the steering detection includes: controlling the motor to run at a predetermined speed.

4. The method for controlling a motor of an electric home appliance according to claim 1, further comprising:

5. The motor control method of the household electrical appliance according to claim 4, wherein the intelligent power module outputs an alternating current voltage to drive the motor to operate; when the motor is operating in a forward direction, the three-phase sequence of the alternating voltage comprises one of:

the three phases of the alternating voltage are sequentially arranged into a U phase, a V phase and a W phase;

6. The motor control method of the household electrical appliance according to claim 4, wherein the intelligent power module outputs an alternating current voltage to drive the motor to operate; when the motor is operating in reverse, the three-phase sequence of the alternating voltage comprises one of:

or the three phases of the alternating voltage are sequentially W phase, V phase and U phase.

7. The method for controlling the motor of an electric home appliance according to claim 5 or 6, wherein before the obtaining of the first power for forward operation and the second power for reverse operation, the method further comprises the steps of:

detecting the direct-current bus voltage of the intelligent power module;

detecting three-phase currents of the intelligent power module;

8. The method for controlling the motor of the household electrical appliance according to claim 7, wherein the detecting the three-phase current of the smart power module comprises at least one of the following detection methods:

detecting to obtain three-phase current in a time-sharing manner by adopting a sensor;

9. The method for controlling a motor of an electric home appliance according to claim 1, wherein the determining the target operation direction of the motor according to the first power and the second power comprises at least one of:

10. The method for controlling the motor of the household electrical appliance according to claim 1, wherein the determining the target operation direction of the motor according to the first wind force and the second wind force comprises at least one of:

11. The utility model provides a household electrical appliances's motor control device which characterized in that, the motor drives the wind wheel and rotates, the device includes:

the driving module is used for driving the motor to operate in the forward direction or the reverse direction;

the control module controls the motor to operate according to the target operation direction;

wherein:

Comparing the first power or the second power with a preset power value, wherein the corresponding running direction which is larger than the preset power value is taken as a target running direction of the motor;

the determining the target operation direction of the motor according to the first wind power and the second wind power comprises the following steps:

12. A control device, comprising:

at least one processor;

at least one memory for storing at least one program;

when executed by at least one of the processors, cause the at least one processor to implement a method as claimed in any one of claims 1 to 10.

13. An electric household appliance comprising a compressor and a motor control device of the electric household appliance according to claim 11 or a control device according to claim 12.

14. A computer-readable storage medium, having stored thereon a program executable by a processor, the program being executable by the processor to perform the method of any one of claims 1-10 when executed by the processor.