CN108471198B - Control method, device and system for switched reluctance motor and controller - Google Patents

Abstract

The embodiment of the invention discloses a switch reluctance motor and a control method, a device and a system thereof, wherein the switch reluctance motor comprises: a stator core, a sealed housing, and a condenser; the sealing shell is sleeved outside the stator core; the inside of the sealed shell is filled with evaporative cooling liquid, and the stator core is soaked in the evaporative cooling liquid; the upper part of the sealing shell is provided with a liquid storage tank and a condenser, the flow of cooling medium in the condenser is adjustable, the non-material damping coefficient in the sealing shell is changed, the suppression of stator core vibration during the running of the switched reluctance motor is realized, and the effects of vibration reduction and noise reduction are achieved.

Description

A method, device, system and controller for controlling a switched reluctance motor

technical field

The present application relates to the technical field of motor control, in particular to a switched reluctance motor and its control method, device and system.

Background technique

The switched reluctance motor has a simple structure, firmness, simple manufacturing process, low cost, can be applied to various harsh environments, has a wide speed range and high efficiency. All kinds of outstanding advantages make the switched reluctance motor become a strong competitor of AC motor drive system, DC motor drive system and permanent magnet brushless DC motor drive system. However, because the switched reluctance motor has a doubly salient pole structure, it inevitably has the most important shortcomings such as torque ripple, large vibration, and large noise.

Therefore, how to reduce the vibration and noise of the switched reluctance motor is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the embodiments of the present application provide a switched reluctance motor and its control method, device and system, which can solve problems such as vibration and noise during the operation of the switched reluctance motor in the prior art.

A switched reluctance motor provided in an embodiment of the present application includes: a stator core, a sealed casing, and a condenser;

The sealed casing is sheathed on the outside of the stator core;

The inside of the sealed shell is filled with evaporative cooling liquid, and the stator core is immersed in the evaporative cooling liquid;

The upper part of the sealed housing is provided with a liquid storage tank and a condenser, and the flow rate of the cooling medium in the condenser is adjustable.

Optionally, the condenser includes: a flow regulating valve;

The flow regulating valve is used to adjust the flow of the cooling medium.

A switched reluctance motor control method provided in an embodiment of the present application is applied to a switched reluctance motor as described in any of the above embodiments; the method includes:

Obtain the turn-on angle and turn-off angle of the switched reluctance motor to obtain a combination of switch angles;

inputting the combination of switching angles into a pre-obtained control model to obtain the control flow corresponding to the combination of switching angles;

The flow rate of the cooling medium is adjusted to the control flow rate, so as to reduce the vibration amplitude of the stator core.

Optionally, inputting the combination of switching angles into the pre-obtained control model to obtain the control flow corresponding to the combination of switching angles also includes:

According to the pre-obtained training data set, train the neural network to obtain the control model;

Wherein, the training data set includes multiple sets of correspondences between switching angle combinations and control flows.

Optionally, the neural network is a feedforward neural network.

A switched reluctance motor control device provided in an embodiment of the present application is applied to a switched reluctance motor as described in any of the above embodiments; the device includes: an acquisition module, a determination module, and an adjustment module;

The obtaining module is used to obtain the turn-on angle and turn-off angle of the switched reluctance motor to obtain a combination of switch angles;

The determining module is configured to input the switching angle combination into a pre-obtained control model to obtain the control flow corresponding to the switching angle combination;

The adjustment module is used to adjust the flow of the cooling medium to the control flow, so as to reduce the vibration amplitude of the stator core.

Optionally, the device also includes: a training module;

The training module is used to train the neural network according to the pre-obtained training data set to obtain the control model;

Wherein, the training data set includes multiple sets of correspondences between switching angle combinations and control flows.

Optionally, the neural network is a feedforward neural network.

A switched reluctance motor control system provided in an embodiment of the present application includes: a switched reluctance motor and a control unit;

The switched reluctance motor includes: a stator core and a condenser;

A sealed casing is sheathed outside the stator core;

An evaporative cooling liquid is arranged inside the sealed housing, and the stator core is immersed in the evaporative cooling liquid;

The upper part of the sealed housing is provided with a condenser, and the flow rate of the cooling medium inside the condenser is adjustable;

The control unit is configured to execute the switching reluctance motor control method described in any of the above embodiments.

The embodiment of the present application also provides a controller applied to the switched reluctance motor described in any of the above embodiments; the controller includes: a memory and a processor;

The memory is used to store program codes;

The processor is configured to obtain the program code, and when the program code is executed by the processor, implement the switched reluctance motor control method according to any one of the above-mentioned embodiments.

Compared with the prior art, the present application has at least the following advantages:

In the embodiment of the present application, the stator core of the switched reluctance motor is immersed in the evaporative cooling liquid in the sealed casing, and the upper part of the sealed casing is also provided with a liquid storage tank and a condenser to adjust the temperature of the evaporative cooling liquid. The flow rate of the cooling liquid in the condenser is adjustable, so that the temperature of the evaporative cooling liquid can be adjusted within a certain range, changing the non-material damping coefficient inside the sealed shell, and realizing the suppression of the vibration of the stator core when the switched reluctance motor is running , to achieve the effect of vibration reduction and noise reduction.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of an existing SRM structure;

Fig. 2 is a schematic structural diagram of a switched reluctance motor provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for controlling a switched reluctance motor provided in an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a switched reluctance motor control device provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a switched reluctance motor control system provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Today's world is facing a double crisis of energy shortage and environmental pressure. The shortage of primary energy such as oil and the increasingly serious environmental problems worldwide force governments to continuously strengthen the research and development of clean energy vehicles. Among them, electric vehicles, as the name suggests, are vehicles that use electricity to completely replace petroleum fuels. Compared with traditional vehicles that use gasoline combustion as a power source, they have absolute advantages in terms of environmental protection, cleanliness, and energy saving. In the whole research and development process of electric vehicles, three major elements play a supporting role, namely "motor", "inverter" and "battery". The progress of battery technology and inverter technology has been quite significant, but the impact However, there are always problems of one kind or another in the motor (ie, the drive motor) of the running performance and fuel efficiency performance of the vehicle.

At present, the driving motors of electric vehicles mainly include DC motors, asynchronous motors, permanent magnet brushless motors, switched reluctance motors, etc. Since the drive motor must be able to be arranged in the narrow space between the car engine and the gearbox, the vehicle drive motor is required to be small in size, high in power, and high in efficiency. However, DC motors, asynchronous motors and other rotating motors that use the principle of electromagnetic induction are difficult to miniaturize; permanent magnet brushless motors are small in size and light in weight, so they are considered the most promising, but they have the inherent disadvantages of high cost and easy demagnetization . The switched reluctance motor has a simple structure, firmness, simple manufacturing process, low cost, can be applied to various harsh environments, has a wide speed range and high efficiency, and various outstanding advantages make the switched reluctance motor become an AC motor drive system, A strong contender for DC motor drive systems and permanent magnet brushless DC motor drive systems.

Referring to FIG. 1 , this figure is a schematic structural diagram of a switched reluctance motor in the prior art. When the current control switches SI and S2 of phase A winding 2′ are closed, phase A is energized, while phase B and phase C are not energized, and phase A is excited to generate a magnetic field, because the magnetic flux of the motor is always closed along the path with the smallest reluctance. And when the axis of the magnetic pole of phase A coincides with the axis of the magnetic pole a of the rotor 7', the reluctance of the magnetic circuit is the smallest, so the twisted magnetic field line produces a tangential pulling force, trying to make a-a' coincide with A-A', and finally rotate to a The position where -a' coincides with A-A' stops rotating. Subsequently, if the motor is to be continuously rotated, it is necessary to energize the B phase, and at the same time, the A phase and the C phase are de-energized. At this time, the magnetic field in the motor becomes a magnetic field with the magnetic pole of the B phase as the axis, and the motor rotor 7' will continue to rotate until coincides exactly with BB'. Then, phase C is energized, and phase A and phase B are de-energized at the same time. At this time, the magnetic field in the motor becomes a magnetic field with the pole axis of phase C, and the motor rotor 7' will continue to rotate until it completely coincides with CC'. Such repeated cycles, as long as the three-phase stator windings 2' are energized in the order of A-B-C-A-B-..., the rotor 7' of the motor will always rotate in the same direction around the center line of the rotating shaft 8'.

It can be seen from the above working process that the electromagnetic torque generated by the switched reluctance motor is different from the stable electromagnetic torque of the traditional AC and DC motors. Its electromagnetic torque is pulsating in nature, and the corresponding magnetic pull has not only tangential There are also radial ones, in which the tangential component of the magnetic pull is what pulls the motor to run. Because of its pulsating nature, the motor runs unevenly, deforms and vibrates, and then generates serious noise. The radial component of the magnetic pulling force will change with the position of the rotor 7' and the current of the stator winding 2', thus causing deformation and vibration of the stator core 1' of the motor, and further generating more serious noise.

To this end, the embodiment of the present application provides a switched reluctance motor and its control method and device. By adjusting the non-material damping coefficient of the evaporative cooling liquid soaked in the stator core, the stator vibration is completely suppressed and attenuated, and the switching reluctance motor is eliminated. Vibration and noise, which are of great significance for electric vehicles to obtain good traction characteristics, improve the handling stability and ride comfort of vehicle systems.

Based on the above ideas, in order to make the above purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings.

Referring to FIG. 2 , this figure is a schematic structural diagram of a switched reluctance motor provided by an embodiment of the present application.

The switched reluctance motor provided by the embodiment of the present application includes: a stator core 10, a sealed casing 30 and a condenser 20;

A sealed casing 30 is sheathed on the outside of the stator core 10;

The sealed shell 30 is filled with an evaporative cooling liquid 31, and the stator core 10 is soaked in the evaporative cooling liquid 31;

A liquid storage tank 32 and a condenser 20 are arranged on the upper part of the sealed housing 30, and the flow rate of the cooling medium inside the condenser 20 is adjustable.

In the embodiment of the present application, the SRM stator is sealed as a whole by using the sealed casing 30, and the inside of the sealed casing 30 is filled with evaporative cooling liquid 31 to cover the entire stator core 10, and a condenser 20 is installed on the upper part of the sealed casing 30. The flow rate of the cooling medium in the condenser 20 is adjustable.

When the SRM is in operation, the heat emitted by the stator core 10 is transferred to the evaporative cooling liquid 31 , causing the evaporative cooling liquid 31 to boil. After the evaporative cooling liquid 31 evaporates into a gaseous state, it rises away from the liquid surface due to the decrease in density, and continues to rise to contact the condenser 20. The gaseous evaporative cooling liquid 31 transfers heat to the condenser 20, then liquefies, returns to a liquid state, and then drop back to the liquid surface. In this way, the heat emitted by the stator core 10 can be continuously transferred to the condenser 20, and then all the heat can be taken away by the cooling medium (such as cold wind or cooling water) in the condenser 20. When the internal pressure of the sealed housing 30 increases, part of the evaporative cooling liquid 31 can be pressed into the liquid storage tank 32, and as part of the evaporative cooling liquid 31 enters the liquid storage tank 32, the pressure on the liquid surface of the evaporative cooling liquid 31 is increased. The cavity space is sealed, and the pressure in this part of the space is released. The liquid storage tank 32 plays a role of releasing pressure and protecting the sealed casing 30 from being crushed and exploded.

Due to the viscosity properties of various liquids such as oil and water, they all show different degrees of viscosity when flowing in pipes, boxes, oil chambers, cylinders and other containers, which can play a damping role and consume vibration energy. This phenomenon is called non-material damping, or viscous damping. When the stator vibrates during SRM operation, since the stator core 10 is filled with gas-liquid two-phase evaporative cooling liquid 31, and the evaporative cooling liquid 31 is in a state of evaporating and cooling cycle reciprocating motion, with a certain flow velocity, forming a comparative Strong non-material damping, the stator core 10 will be subject to a strong non-material damping force, hindering the vibration of the stator core 10, consuming its vibration energy, suppressing the development of vibration during SRM operation, the source of vibration is weakened, and its noise intensity Naturally, it is also greatly reduced.

The inventor found in the research that since the flow rate of the cooling medium in the condenser 20 is adjustable, the temperature of the evaporative cooling liquid 31 can be changed, so that the dynamic viscosity of the gas-liquid two-phase flow of the evaporative cooling liquid 31 in the sealed housing 30 can be adjusted. By controlling, the non-material damping coefficient corresponding to the dynamic viscosity can be changed. By adjusting the non-material damping coefficient of the evaporative cooling liquid in the sealed casing 30, the vibration of the attenuated stator core 10 can be suppressed to the greatest extent, so that the output of the stator amplitude during the operation of the SRM is minimized, thereby suppressing the vibration of the stator and eliminating the switched reluctance motor. vibration and noise, so that SRM has a better vibration and noise reduction effect. The specific principles are as follows:

During the operation of SRM, it generally goes through three operation stages: starting, constant torque and constant power. In the starting stage, in order to obtain a larger starting torque, the opening and closing angles are often kept constant; in the constant torque stage, the current chopping control method is adopted, and the opening and closing angles are slightly adjusted; in the constant power stage, the angular position control is adopted. The opening and closing angles should be adjusted frequently.

Corresponding to the combination of the on-angle θ _on and the off-angle θ _off in these three operating modes, assuming that the main circuit DC side excitation power of the SRM drive part is E, and adopting the conventional commutation method, the single-phase stator circuit corresponds to The activation and shutdown excitation equations are as follows (1):

In the formula, u _k is the voltage applied to the stator winding of each phase, and θ is the rotor position angle.

According to the previous explanation, at the moment when one phase of the SRM is turned on, it is the moment when the commutation starts, and one phase starts to be turned on. According to the formula (1), the phase voltage of this phase jumps from -E to +E, The vibration thus excited is as follows (2):

where c is the non-material damping coefficient of the gas-liquid two-phase flow medium, A is the maximum amplitude of the SRM stator, m is the mass of the stator, and _ω0 is the natural frequency of the stator.

After time _t1 , the rotor moves to the cut-off angle position, and the conduction phase starts to turn off, then its phase voltage changes from +E to -E, and the vibration excited by it is as follows (3):

Then, the excited total synthetic vibration on the stator core 10 is the sum of formula (2) and formula (3), namely formula (4):

In the formula, f(x) is the amplitude of the stator core 10 .

From equations (2)-(4), it can be seen that by adjusting the non-material damping coefficient c of the evaporative cooling liquid in the sealed casing 30, the stator amplitude output during the operation of the SRM can be minimized, thereby suppressing the vibration of the stator and eliminating the vibration of the switched reluctance motor. vibration and noise.

The non-material damping coefficient is closely related to the physical state of the evaporative cooling liquid 31 inside the sealed enclosure 30 . Assume that the non-material damping coefficient of the evaporative cooling liquid 31 is c, the dynamic viscosity is μ, the flow velocity generated by the evaporation and cooling of the evaporative cooling liquid 31 is υ, the vibrating area of the stator in contact with the evaporative cooling liquid 31 is S, and the evaporative cooling liquid 31 is 31 The width of the channel that flows through is δ, then according to the vibration mechanics, the non-material damping force F _C can be obtained as the following formula (5),

F _c ＝c·υ(5)

According to Newton's law of internal friction in fluid mechanics, the viscous friction in fluid motion can be obtained as the following formula (6),

It is known that the non-material damping in the process of liquid flow comes from its viscosity, that is, F _C =F _μ , the following formula (7) can be obtained,

According to the changing law of fluid viscosity described by the theory of fluid mechanics, the viscosity of a liquid depends on the molecular distance and molecular attraction. When the temperature rises or the pressure decreases, the liquid expands, the molecular distance increases, and the molecular attraction decreases, so the viscosity decreases. , on the contrary, when the temperature decreases or the pressure increases, the viscosity of the liquid increases, and the change law of the viscosity of the liquid can be expressed in the exponential form of formula (8):

In the formula, μ ₀ is the liquid dynamic viscosity when the temperature is t ₀ and the gauge pressure is zero; μ is the fluid dynamic viscosity when the temperature is t and the gauge pressure is p; An index of the degree of liquid is generally called the viscosity-pressure index of the liquid; λ is an index that reflects the speed at which the viscosity of the liquid decreases when the temperature rises, and is generally called the viscosity-temperature index of the liquid. Unless the pressure is extremely high, greater than 10 ⁷ Pa, the viscosity of the liquid under normal circumstances is very weakly affected by the pressure, but is very sensitive to the change of temperature. When the temperature rises slightly, the dynamic viscosity of the liquid decreases obviously. For the switched reluctance motor provided by the embodiment of the present application, the pressure in the sealed casing 30 cannot reach as high as 10 ⁷ Pa, but is basically at a level similar to or slightly lower than the atmospheric pressure of the outside air, which is much lower. It is less than 10 ⁷ Pa, so the influence of pressure on liquid viscosity can be completely ignored.

However, the viscosity variation law of gas and liquid is different. Since the distance between gas molecules is relatively large and the molecular motion is relatively violent, according to the theory of molecular motion, the statistical average value of gas dynamic viscosity is formula (9):

In the formula, the molecular density ρ is inversely proportional to the temperature and proportional to the pressure, the average molecular velocity υ' and the molecular mean free path l are both directly proportional to the temperature and inversely proportional to the pressure. Therefore, when the temperature increases, the dynamic viscosity of the gas increases, and when the pressure increases, the dynamic viscosity of the gas decreases.

During specific implementation, most of the evaporative cooling liquid 31 in the gas-liquid two-phase flow state in the sealed casing 31 is still in a liquid state, so its hydrodynamic viscosity is basically consistent with that of a pure liquid state, and still conforms to the change rule of formula (8). Therefore, during the operation of the SRM, the dynamic viscosity of the evaporative cooling liquid 31 can be changed only by adjusting the temperature of the evaporative cooling liquid 31 in the sealed casing 30, and then according to formula (7), it can be seen that the temperature change of the evaporative cooling liquid 31 also changes the evaporative cooling liquid 31 Non-material damping coefficient c during flow.

To sum up, in the embodiment of the present application, by adjusting the flow rate of the condensing medium in the condenser 20, the temperature of the evaporative cooling liquid 31 can be adjusted, and the non-material damping coefficient in the flow process of the evaporative cooling liquid 31 can be changed, thereby changing the The amplitude of SRM stator vibration can suppress the vibration and noise of SRM.

In some possible implementations of the embodiments of the present application, referring to FIG. 2 , the condenser 20 may specifically include a flow regulating valve 21 for regulating the flow of the cooling medium in the condenser 20 .

In practical applications, the flow regulating valve 21 may specifically be an intelligent electronic flow regulating valve. The intelligent electronic flow regulating valve is an intelligent control device that can accurately adjust the medium flow and low power consumption. It can be connected with a computer or a single-chip microcomputer, accept real-time control of computer instructions, and send the current actual flow rate of the medium at any time.

In the embodiment of the present application, the stator core of the switched reluctance motor is immersed in the evaporative cooling liquid in the sealed casing, and a condenser is provided on the upper part of the sealed casing to adjust the temperature of the evaporative cooling liquid. The flow rate of the cooling liquid in the condenser is adjustable, so that the temperature of the evaporative cooling liquid can be adjusted within a certain range, and the non-material damping coefficient inside the sealed shell is changed, thereby realizing the vibration control of the stator core when the switched reluctance motor is running. Inhibit to achieve the effect of vibration reduction and noise reduction.

Based on the switched reluctance motor provided by the above embodiments, the embodiment of the present application further provides a method for controlling the switched reluctance motor.

Referring to FIG. 3 , this figure is a schematic flowchart of a method for controlling a switched reluctance motor provided in an embodiment of the present application. It should be noted that the switched reluctance motor control method provided in the embodiment of this application is not only applicable to the general one-step shutdown control method, but also applicable to other two-step shutdown methods and three-step shutdown methods. The embodiment does not specifically limit this.

The switched reluctance motor control method provided in the embodiment of the present application is applied to the switched reluctance motor provided in any of the above embodiments, and the method includes the following steps S301-S303.

S301: Obtain the turn-on angle and turn-off angle of the switched reluctance motor to obtain a switch angle combination.

In practical applications, when controlling the SRM action, the control chip will first detect the operating phase of the SRM, which can be realized through the operating speed of the SRM, and then issue an angle position command to control the combination of switching angles to control the switching state of each phase of the stator winding . Therefore, in the embodiment of the present application, the switch angle combination can be obtained from the control chip or the angle position command sent by the control chip.

S302: Input the switching angle combination into the pre-obtained control model to obtain the control flow rate corresponding to the switching angle combination.

In the embodiment of the present application, the flow rate can be controlled so that the temperature of the evaporative cooling liquid 31 is at a stage where the vibration of the switched reluctance motor is small. By adjusting the flow rate of the cooling medium, the temperature of the evaporative cooling liquid 31 is adjusted to suppress the amplitude of the stator. .

In some possible implementation manners, the control model may be trained in advance according to the correspondence between multiple sets of switching angle combinations and control flow. Then, before step S302, the following steps may also be included:

S304: According to the pre-obtained training data set, train the neural network to obtain the control model.

Wherein, the training data set includes multiple sets of correspondences between switching angle combinations and control flows.

In practical applications, in order to improve the effect of vibration suppression, the vibration measuring instrument and its supporting sensors can be used to measure the transient values of the amplitude, vibration velocity and vibration acceleration of the SRM stator in advance, and each Under the combination of opening and closing angles of a fully-controlled power switching device, gradually change the flow rate of the cooling medium in the condensation pipe 20 to adjust the temperature of the evaporative cooling liquid 31, and continue to experiment until the flow rate of the cooling medium that minimizes the stator amplitude is found, and the opening The control flow corresponding to the combination of the switching angle and the cut-off angle is used to obtain a training data set including the correspondence between multiple sets of switching angle combinations and the control flow.

In some possible implementations of the embodiments of the present application, the neural network used for training may be a feedforward neural network. The embodiment of the present application does not specifically limit the structure of the neural network, and the model training method will not be repeated here.

It can be understood that S304 may be performed before step S301, may also be performed after step S301, or be performed in parallel with step S301, which is not limited in this embodiment of the present application.

S303: Adjust the flow rate of the cooling medium to the control flow rate, so as to reduce the vibration amplitude of the stator core.

In the embodiment of the present application, the stator core of the switched reluctance motor is immersed in the evaporative cooling liquid in the sealed casing, and a condenser is provided on the upper part of the sealed casing to adjust the temperature of the evaporative cooling liquid. The flow rate of the cooling liquid in the condenser is adjustable, so that the temperature of the evaporative cooling liquid can be adjusted within a certain range, and the non-material damping coefficient inside the sealed shell is changed, thereby realizing the vibration control of the stator core when the switched reluctance motor is running. Inhibit to achieve the effect of vibration reduction and noise reduction.

Based on the switched reluctance motor and the control method thereof provided in the above embodiments, the embodiment of the present application further provides a switched reluctance motor control device.

Referring to FIG. 4 , this figure is a schematic structural diagram of a switched reluctance motor control device provided by an embodiment of the present application.

The switched reluctance motor control device provided in the embodiment of the present application is applied to the switched reluctance motor provided in any of the above embodiments, and can be configured in an SRM control chip; the switched reluctance motor control device includes: an acquisition module 100, a determination module 200 and adjustment module 300;

An acquisition module 100, configured to acquire the turn-on angle and turn-off angle of the switched reluctance motor to obtain a switch angle combination;

A determining module 200, configured to input the switching angle combination into a pre-obtained control model to obtain the control flow corresponding to the switching angle combination;

The adjustment module 300 is used to adjust the flow rate of the cooling medium to a control flow rate, so as to reduce the vibration amplitude of the stator core.

In some possible implementations, the switched reluctance motor control device provided in the embodiment of the present application may further include: a training module;

The training module is used to train the neural network and obtain the control model according to the pre-obtained training data set;

Wherein, the training data set includes multiple sets of correspondences between switching angle combinations and control flows.

As an example, the neural network used for training is a feed-forward neural network.

In the embodiment of the present application, the stator core of the switched reluctance motor is immersed in the evaporative cooling liquid in the sealed casing, and a condenser is provided on the upper part of the sealed casing to adjust the temperature of the evaporative cooling liquid. The flow rate of the cooling liquid in the condenser is adjustable, so that the temperature of the evaporative cooling liquid can be adjusted within a certain range, and the non-material damping coefficient inside the sealed shell is changed, thereby realizing the vibration control of the stator core when the switched reluctance motor is running. Inhibit to achieve the effect of vibration reduction and noise reduction.

Based on the switched reluctance motor and its control method and device provided in the above embodiments, an embodiment of the present application further provides a switched reluctance motor control system.

Referring to FIG. 5 , this figure is a schematic structural diagram of a switched reluctance motor control system provided by an embodiment of the present application.

The switched reluctance motor control system provided in the embodiment of the present application includes: a switched reluctance motor 501 and a control unit 502 .

Wherein, the switched reluctance motor 501 may be the switched reluctance motor provided by any of the above embodiments; the control unit 502 is configured to execute the switched reluctance motor control method provided by any of the above embodiments.

In the embodiment of the present application, the stator core of the switched reluctance motor is immersed in the evaporative cooling liquid in the sealed casing, and a condenser is provided on the upper part of the sealed casing to adjust the temperature of the evaporative cooling liquid. The flow rate of the cooling liquid in the condenser is adjustable, so that the temperature of the evaporative cooling liquid can be adjusted within a certain range, and the non-material damping coefficient inside the sealed shell is changed, thereby realizing the vibration control of the stator core when the switched reluctance motor is running. Inhibit to achieve the effect of vibration reduction and noise reduction.

Based on the switched reluctance motor and its control method, device and system provided in the above embodiments, the embodiments of the present application further provide a controller for controlling the switched reluctance motor provided in the above embodiments. The controller includes: a memory and a controller;

Wherein, the memory is used to store the program code; the processor is used to acquire the program code, and when the program code is executed by the processor, the method for controlling the switched reluctance motor provided by the above-mentioned embodiments is implemented.

It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment focuses on the differences from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for relevant details, please refer to the description of the method part.

It should also be noted that in this article, relational terms such as first and second etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has disclosed the above with preferred embodiments, it is not intended to limit the present application. Any person familiar with the art, without departing from the scope of the technical solution of the application, can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the application, or to modify the equivalent of the equivalent change Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present application that do not deviate from the content of the technical solution of the present application still fall within the protection scope of the technical solution of the present application.

Claims (6)

1. A control method of a switch reluctance motor is characterized by being applied to the switch reluctance motor; the switched reluctance motor includes: a stator core, a sealed housing, and a condenser; the sealing shell is sleeved outside the stator core; the inside of the sealed shell is filled with evaporative cooling liquid, and the stator core is soaked in the evaporative cooling liquid; the upper part of the sealing shell is provided with a liquid storage tank and a condenser, and the flow of cooling medium in the condenser is adjustable; the condenser comprises: a flow regulating valve; the flow regulating valve is used for regulating the flow of the cooling medium;

the method comprises the following steps:

acquiring an on angle and an off angle of the switched reluctance motor to obtain a switch angle combination;

training a neural network according to a pre-obtained training data set to obtain a control model;

the training data set comprises a plurality of groups of corresponding relations between switch angle combinations and control flow;

inputting the switch angle combination into the control model to obtain control flow corresponding to the switch angle combination;

and adjusting the flow rate of the cooling medium to the control flow rate to reduce the amplitude of the stator core.

2. The method of claim 1, wherein the neural network is a feed-forward neural network.

3. A control device that performs the control method of the switched reluctance motor according to claim 1, characterized in that the control device comprises: the device comprises an acquisition module, a determination module, a training module and an adjustment module;

the acquisition module is used for acquiring the on angle and the off angle of the switched reluctance motor to obtain a switch angle combination;

the training module is used for training the neural network according to a preset training data set to obtain a control model;

the determining module is used for inputting the switch angle combination into the control model to obtain control flow corresponding to the switch angle combination;

the adjusting module is used for adjusting the flow of the cooling medium to the control flow so as to reduce the amplitude of the stator core.

4. A control device according to claim 3, wherein the neural network is a feed-forward neural network.

5. A switched reluctance motor control system comprising: a switched reluctance motor and a control unit;

the switched reluctance motor includes: a stator core and a condenser;

a sealing shell is sleeved outside the stator core;

the inside of the sealed shell is provided with evaporative cooling liquid, and the stator core is soaked in the evaporative cooling liquid;

the upper part of the sealing shell is provided with a condenser, and the flow of cooling medium in the condenser is adjustable;

the control unit is configured to perform the switched reluctance motor control method according to any one of claims 1-2.

6. A controller, characterized by being applied to a switched reluctance motor; the controller includes: a memory and a processor;

the memory is used for storing program codes;

the processor being configured to obtain the program code, which when executed by the processor, implements the switched reluctance motor control method according to any one of claims 1-2.