CN219659607U - Drive control module for direct-drive motor - Google Patents
Drive control module for direct-drive motor Download PDFInfo
- Publication number
- CN219659607U CN219659607U CN202320844091.1U CN202320844091U CN219659607U CN 219659607 U CN219659607 U CN 219659607U CN 202320844091 U CN202320844091 U CN 202320844091U CN 219659607 U CN219659607 U CN 219659607U
- Authority
- CN
- China
- Prior art keywords
- module
- direct
- drive motor
- drive
- bus capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 54
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 33
- 230000008929 regeneration Effects 0.000 claims description 20
- 238000011069 regeneration method Methods 0.000 claims description 20
- 230000001172 regenerating effect Effects 0.000 claims description 18
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
The utility model relates to a drive control module for a direct drive motor, comprising: the input end of the rectifying and filtering module is connected with the mains supply; the input end of the inversion module is connected with the output end of the rectifying and filtering module, and the output end of the inversion module is connected with the direct-drive motor and is used for supplying power to the direct-drive motor and controlling the running state of the direct-drive motor; the driving controller is provided with a switching power supply input end which is connected with the inversion module and used for outputting different control signals to the inversion module so as to control the running state of the direct-drive motor through the inversion module; the method is characterized in that: further comprises: the bus capacitor is connected between the rectifying and filtering module and the inversion module; the input end of the power supply module is connected with the bus capacitor, the output end of the power supply module is connected with the switch power supply input end of the drive controller, and the power supply module is used for taking electricity from the bus capacitor to supply power for the drive controller. The control module has the advantages of low cost, controllable braking distance, better effect and higher safety and reliability.
Description
Technical Field
The utility model relates to the technical field of direct-drive motor control, in particular to a drive control module for a direct-drive motor.
Background
The direct drive motor is a direct drive motor for short, and mainly refers to a motor which does not need to pass through a transmission device (such as a transmission belt and the like) when driving a load. The direct-drive motor has the advantages that the transmission structures such as the screw rod, the belt and the gear are removed, the overall rigidity is high, the operation precision is high, the speed is high, a load with large mass can be carried in actual use, the inertia ratio can be very large, and the direct-drive motor is a great advantage of the direct-drive motor, so that the direct-drive motor is suitable for various washing machines. But at the same time, the direct drive motor also brings another problem in the use process: because the whole mechanical structure is not provided with a speed reducing mechanism, the friction force is small, when the situation of sudden power failure and the like is encountered in the process of high-speed running with a large load, the load is in a runaway state, and can continue to run at a high speed under the action of inertia, so that the whole mechanical structure is extremely dangerous, and collision, galloping and even personal injury can occur.
At present, the following two solutions are available for solving the braking problem of the direct-drive motor: the first is to use dynamic braking mode, namely: after the driver is powered off, the UVW phase line of the motor is short-circuited through a relay, so that current generated during motor movement is heated and dissipated in a motor coil, and motor braking is realized; the second is a mechanical braking mode, for example, chinese patent No. ZL201821966152.7 (issued to CN 209150905U) discloses a braking device for a direct-drive motor, which adsorbs an adsorption element when the electromagnet is energized; the electromagnet releases the absorption part when the power is off, and the elastic acting force of the elastic supporting structure enables the first friction part to abut against the second friction part so as to limit the mover of the motor to do linear motion; in addition, for example, chinese utility model with patent number ZL 202220786745.5 (grant publication number CN 217563506U) discloses an electromagnetic braking device for a linear motor mover, which realizes switching between motion and braking by a magnet and a permanent magnet.
Although both of the above solutions can achieve the braking problem of the direct drive motor, the existing solutions have the following limitations: 1. because the dynamic braking force in the dynamic braking mode is uneven in the whole braking process, the braking force can be reduced as long as the speed exceeds a certain speed, which means that the braking force is relatively weak in a high-speed stage, the braking distance can be relatively long, and the risk of overshooting and flying out can exist when the braking distance is uncontrollable in high-speed movement; 2. the mechanical braking mode can increase the cost and the complexity of structural design due to the additional installation of a mechanical device, and the mechanical braking is generally applied to the vertical environment to prevent falling, but the mechanical braking can cause overlarge braking force directly through the mechanical braking during high-speed movement, cause larger abrasion to the machinery and easily damage a braking mechanism, so the braking of movement speed reduction by a mechanical mode is not generally recommended. For this reason, further improvements are needed in the art.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a driving control module for a direct-drive motor, which is low in cost and safer and more reliable.
The technical scheme adopted for solving the technical problems is as follows: a drive control module for a direct drive motor, comprising:
the input end of the rectifying and filtering module is connected with the mains supply;
the input end of the inversion module is connected with the output end of the rectifying and filtering module, and the output end of the inversion module is connected with the direct-drive motor and is used for supplying power to the direct-drive motor and controlling the running state of the direct-drive motor;
the driving controller is provided with a switching power supply input end which is connected with the inversion module and used for outputting different control signals to the inversion module so as to control the running state of the direct-drive motor through the inversion module;
the method is characterized in that: further comprises:
the bus capacitor is connected between the rectifying and filtering module and the inversion module;
the input end of the power supply module is connected with the bus capacitor, the output end of the power supply module is connected with the switch power supply input end of the drive controller, and the power supply module is used for taking electricity from the bus capacitor to supply power for the drive controller.
In order to realize the power-off protection of the direct-drive motor, the motor further comprises a power-off detection module, wherein the input end of the power-off detection module is connected with the mains supply and used for detecting whether power is off or not, and the output end of the power-off detection module is connected with the drive controller; the drive controller is configured to: after the power-off detection module detects that the commercial power is off, different PWM control signals are output to the inversion module to control the direct-drive motor to perform deceleration braking according to the set deceleration.
To protect the safety of the bus capacitor, the method further comprises:
the input end of the voltage detection module is connected between the bus capacitor and the inversion module, and the output end of the voltage detection module is connected with the drive controller and is used for detecting the voltage of the bus capacitor;
the input end of the regeneration braking module is connected with the driving controller, and the output end of the regeneration braking module is connected between the bus capacitor and the input end of the power supply module;
the drive controller is configured to: and judging whether the regenerative braking module needs to be opened according to the detection result of the voltage detection module, and releasing the energy of the bus capacitor in the opened state of the regenerative braking module.
Preferably, the regeneration braking module comprises a regeneration resistor and an MOS tube, wherein a source electrode of the MOS tube is connected with one end of the regeneration resistor, a grid electrode of the MOS tube is connected with the driving controller, and a drain electrode of the MOS tube and the other end of the regeneration resistor are respectively connected with two ends of the bus capacitor in parallel.
In order to provide a freewheel path when the MOS tube is turned off, the regeneration braking module further comprises a freewheel diode connected with the regeneration resistor in parallel.
Preferably, the voltage detection module comprises a voltage division circuit formed by connecting at least two voltage division resistors in series and a first optocoupler, the voltage division circuit is connected in parallel to two ends of the bus capacitor, one of the voltage division resistors in the voltage division circuit is connected in parallel with the input end of the first optocoupler, and the output end of the first optocoupler is connected with the driving controller.
Compared with the prior art, the utility model has the advantages that: the power supply module directly takes electricity from the bus capacitor to supply power to the driving controller without changing the structure of the direct-drive motor, so that the driving controller can maintain the work of the driving controller by discharging the bus capacitor after the commercial power is cut off, the driving controller can control the direct-drive motor to perform deceleration braking according to the set deceleration through the inversion module, the potential safety risk caused by inertia after the direct-drive motor is cut off is solved, and the movement speed of the direct-drive motor after the power is cut off is in a controllable state. Therefore, the control system has low cost, controllable braking distance, better effect and higher safety and reliability.
Drawings
FIG. 1 is a control block diagram of a drive control module for a direct drive motor in an embodiment of the present utility model;
FIG. 2 is a circuit diagram of an interrupt detection module according to an embodiment of the present utility model;
fig. 3 is a circuit diagram of the regenerative braking module and the voltage detection module according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the drive control module for a direct drive motor in this embodiment includes a rectifying and filtering module, an inverter module, a drive controller, a bus capacitor, and a power module.
The input end of the rectifying and filtering module is connected with the mains supply, the output end of the rectifying and filtering module is connected with the input end of the inversion module, and the output end of the inversion module is connected with the direct-drive motor and is used for supplying power to the direct-drive motor and controlling the running state of the direct-drive motor; in this embodiment, the rectifying and filtering module is a rectifying bridge, and the inverting module is a commonly used DC-AC module, so that the direct current output by the rectifying bridge is converted into the alternating current, and thus the alternating current output by the inverting module is used to power the direct-drive motor. In addition, the driving controller in the embodiment is a DSP controller (wherein English of the DSP is fully called as Digital Signal Processing); the bus capacitor is connected between the rectifying and filtering module and the inversion module; the input end of the power supply module is connected with the bus capacitor, the output end of the power supply module is connected with the switch power supply input end of the drive controller, and the power supply module is used for taking electricity from the bus capacitor to supply power for the drive controller.
In addition, the driving control module for the direct-drive motor further comprises a power-off detection module, wherein the input end of the power-off detection module is connected with the mains supply and used for detecting whether power is off or not, and the output end of the power-off detection module is connected with the driving controller; the drive controller is configured to: after the power-off detection module detects that the commercial power is off, different PWM control signals are output to the inversion module to control the direct-drive motor to perform deceleration braking according to the set deceleration.
The implementation manner of the power-off detection module is various, and any one of the prior art may be used, as shown in fig. 2 in the circuit diagram of the power-off detection module in this embodiment, after the mains supply 220V is rectified by the rectifier bridge D1, the second optocoupler E2 is driven by the resistors R1 and R2, the output end of the second optocoupler E2 is filtered by the capacitor C1 and the resistor R3, the port sout of the second optocoupler E is low, once the input power supply 220V is disconnected, the port sout is raised to high level, and the raising time is about 20ms. The drive controller may consider the external power supply to be off upon detecting that the port sout is high, thereby entering a deceleration braking state. The port sout signal can also be sampled by adopting an ADC (i.e. a D/A converter) through the driving controller, and the driving controller judges whether the input power supply is disconnected or not through detecting the amplitude of the signal, so that the judging time can be shortened, and more reliable protection is realized. The second optocoupler E2 may also be a bidirectional optocoupler, so that the rectifier bridge D1 may be omitted to achieve the same effect.
Because the power supply of the driving controller takes electricity from the bus capacitor, and the capacity of the bus capacitor is relatively large, the driving controller still can keep normal operation after the commercial power is cut off. When the direct-drive motor enters a deceleration braking mode, the current generated by reverse power generation of the direct-drive motor can be recharged into the bus capacitor, so that the whole driving controller is kept in a working state until the direct-drive motor stops, and the voltage in the bus capacitor can slowly drop to the whole driving controller to be closed.
In addition, if the load carried by the direct-drive motor is larger, the reverse charging energy generated in the speed reduction process of the direct-drive motor is larger, and in order to realize the protection of the bus capacitor, the driving control module for the direct-drive motor further comprises a voltage detection module and a regeneration braking module, wherein the voltage detection module is used for detecting the voltage of the bus capacitor, the input end of the voltage detection module is connected between the bus capacitor and the inversion module, the output end of the voltage detection module is connected with the driving controller, the input end of the regeneration braking module is connected with the driving controller, and the output end of the regeneration braking module is connected between the bus capacitor and the input end of the power module; the driving controller is configured to determine whether the regenerative braking module needs to be turned on according to a detection result of the voltage detection module, and release energy of the bus capacitor in an on state of the regenerative braking module.
As shown in fig. 3, the regenerative braking module in this embodiment includes a regenerative resistor Rb, a MOS transistor Q1 and a freewheeling diode D2, where a source of the MOS transistor Q1 is connected to one end of the regenerative resistor Rb, a gate of the MOS transistor Q1 is connected to the driving controller, a drain of the MOS transistor Q1 and the other end of the regenerative resistor Rb are respectively connected in parallel to two ends of the bus capacitor C2, and the freewheeling diode D2 is connected in parallel to the regenerative resistor Rb and is configured to provide a freewheeling path when the MOS transistor Q1 is turned off. The drive controller detects the voltage of the bus capacitor in real time, when the voltage of the bus capacitor exceeds the rated voltage of the bus capacitor, the drive controller opens the regenerative braking module at the moment, energy in the bus capacitor is released through an external or built-in regenerative resistor, the service life and safety of the bus capacitor are guaranteed, and when the voltage of the bus capacitor falls to a safety range, the regenerative braking module is closed, so that the regenerative energy is used for maintaining the normal work of the drive controller until the operation is stopped.
The voltage detection module in this embodiment includes a voltage division circuit formed by connecting at least two voltage division resistors in series and a first optocoupler E1, where the voltage division circuit is connected in parallel to two ends of the bus capacitor C2, one of the voltage division resistors in the voltage division circuit is connected in parallel to an input end of the first optocoupler E1, and an output end of the first optocoupler E1 is connected to the driving controller. As shown in fig. 3, the voltage dividing circuit in this embodiment includes a first voltage dividing resistor R4 and a second voltage dividing resistor R5, and the voltage dividing circuit is connected in parallel with the bus capacitor C2, and the first optocoupler E1 plays an electrical isolation role to protect the use safety of the driving controller.
After the voltage divided by the first voltage dividing resistor R4 and the second voltage dividing resistor R5 can keep the first optocoupler E1 turned on, namely: when the real-time acquisition sampling port Us of the drive controller is at a high level, the fact that the bus capacitor C2 is at the high level at the moment is indicated, and the voltage of the bus capacitor C2 can be obtained through calculation according to the voltage dividing circuit and the first optocoupler E1; when the voltage divided by the first voltage dividing resistor R4 and the second voltage dividing resistor R5 turns off the first optocoupler E1, that is, when the drive controller collects the sampling port Us in real time to be at a low level, it is indicated that the bus capacitor C2 is at the low level (the low level here means that the voltage of the bus capacitor C2 is not necessarily 0 relative to the voltage of the bus capacitor C2 when the first optocoupler E1 is turned on), once the voltage value of the bus capacitor exceeds the set regeneration drain voltage, the drive controller outputs a Brk signal, releases energy through the MOS transistor Q1 and the regeneration resistor Rb, and once the voltage of the bus capacitor is lower than the set regeneration drain voltage, turns off the Brk signal.
In addition, in this embodiment, after the drive controller is powered on, the output of the power-off detection module is scanned circularly, once the drive controller detects that the mains supply is powered off, whether the direct-drive motor is in a motion state (the speed is greater than V0mm/s and is considered to be in the motion state) is detected, and if the direct-drive motor is in the motion state, the drive controller controls the direct-drive motor to enter a power-off braking mode: the driving controller stores the power-off trigger record in an alarm record list for later viewing, simultaneously stores the current working mode (position mode, speed mode and torque mode) of the driving controller, switches the working mode into the speed mode, initializes and starts a speed planner according to the current movement speed, plans the movement speed of the motor according to the preset deceleration, takes the planned speed value as an instruction to control the direct-drive motor to decelerate, and cuts off the enabling state of the direct-drive motor after the direct-drive motor is decelerated to 0. If the drive controller detects a power-off event, the direct drive motor is not in a motion state, and the direct drive motor enabling state is directly disconnected. Thereby ensuring that the motor is not in a runaway state. The speed planner is a software module, and the working principle of the speed planner is as follows: the speed planner needs to set the current speed, the target speed, the acceleration and the deceleration when initializing. After starting, the speed planner performs periodically, and each execution period calculates the planning speed according to the current speed and the acceleration and deceleration until the speed planning value is equal to the target speed.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (6)
1. A drive control module for a direct drive motor, comprising:
the input end of the rectifying and filtering module is connected with the mains supply;
the input end of the inversion module is connected with the output end of the rectifying and filtering module, and the output end of the inversion module is connected with the direct-drive motor and is used for supplying power to the direct-drive motor and controlling the running state of the direct-drive motor;
the driving controller is provided with a switching power supply input end which is connected with the inversion module and used for outputting different control signals to the inversion module so as to control the running state of the direct-drive motor through the inversion module;
the method is characterized in that: further comprises:
the bus capacitor is connected between the rectifying and filtering module and the inversion module;
the input end of the power supply module is connected with the bus capacitor, the output end of the power supply module is connected with the switch power supply input end of the drive controller, and the power supply module is used for taking electricity from the bus capacitor to supply power for the drive controller.
2. The drive control module for a direct-drive motor according to claim 1, wherein: the power-off detection module is connected with the commercial power at the input end and used for detecting whether power is off or not, and the output end of the power-off detection module is connected with the driving controller; the drive controller is configured to: after the power-off detection module detects that the commercial power is off, different PWM control signals are output to the inversion module to control the direct-drive motor to perform deceleration braking according to the set deceleration.
3. The drive control module for a direct-drive motor according to claim 2, wherein: further comprises:
the input end of the voltage detection module is connected between the bus capacitor and the inversion module, and the output end of the voltage detection module is connected with the drive controller and is used for detecting the voltage of the bus capacitor;
the input end of the regeneration braking module is connected with the driving controller, and the output end of the regeneration braking module is connected between the bus capacitor and the input end of the power supply module;
the drive controller is configured to: and judging whether the regenerative braking module needs to be opened according to the detection result of the voltage detection module, and releasing the energy of the bus capacitor in the opened state of the regenerative braking module.
4. A drive control module for a direct drive motor according to claim 3, characterized in that: the regeneration braking module comprises a regeneration resistor (Rb) and an MOS tube (Q1), wherein the source electrode of the MOS tube (Q1) is connected with one end of the regeneration resistor (Rb), the grid electrode of the MOS tube (Q1) is connected with a driving controller, and the drain electrode of the MOS tube (Q1) and the other end of the regeneration resistor (Rb) are respectively connected with two ends of a bus capacitor (C2) in parallel.
5. The drive control module for a direct-drive motor according to claim 4, wherein: the regenerative braking module further comprises a freewheeling diode (D2) connected in parallel with the regenerative resistor (Rb).
6. The drive control module for a direct drive motor according to any one of claims 3 to 5, characterized in that: the voltage detection module comprises a voltage division circuit and a first optocoupler, wherein the voltage division circuit is formed by connecting at least two voltage division resistors in series, the voltage division circuit is connected in parallel with two ends of a bus capacitor (C2), one of the voltage division resistors in the voltage division circuit is connected in parallel with the input end of the first optocoupler, and the output end of the first optocoupler is connected with the driving controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320844091.1U CN219659607U (en) | 2023-04-11 | 2023-04-11 | Drive control module for direct-drive motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320844091.1U CN219659607U (en) | 2023-04-11 | 2023-04-11 | Drive control module for direct-drive motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659607U true CN219659607U (en) | 2023-09-08 |
Family
ID=87881006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320844091.1U Active CN219659607U (en) | 2023-04-11 | 2023-04-11 | Drive control module for direct-drive motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659607U (en) |
-
2023
- 2023-04-11 CN CN202320844091.1U patent/CN219659607U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6845843B2 (en) | Vehicle power system | |
| AU602094B2 (en) | Alternating current motor control system with emergency control | |
| KR102049378B1 (en) | Safety arrangement of an elevator | |
| EP2496507B1 (en) | Braking apparatus and electric drive for an elevator system and elevator system comprising them | |
| US9071182B2 (en) | Motor drive device with alarm level setting unit | |
| US5893432A (en) | Controlled emergency stop apparatus for elevators | |
| US20040035646A1 (en) | Elevator controller | |
| JPS6356183A (en) | Invertor for driving elevator | |
| CN103221247A (en) | Control device for electric vehicle | |
| US20140021888A1 (en) | Motor driving device including electric storage device | |
| JP2018074794A (en) | Motor drive device with common forward converter | |
| AU609458B2 (en) | Drive control system for electric motor and failure detector therefor | |
| US8543275B1 (en) | Control device, control method, and electric motor car | |
| CN109534111B (en) | Elevator safety control system and method | |
| CN112693314B (en) | Power supply system for vehicle | |
| CN103754726A (en) | Device for preventing lift car from moving accidentally and method thereof | |
| KR20130037184A (en) | Method and device for braking track-bound vehicles driven by induction motors | |
| US5789896A (en) | Apparatus and method for controlling an electric motor having an armature and a series-wound, series-connected field coil that can be separately controlled during regenerative braking | |
| CN219659607U (en) | Drive control module for direct-drive motor | |
| CN105634370A (en) | Dual power supply and energy crossfeed system used for motor drive | |
| US12084044B2 (en) | Vehicle control system | |
| JP2019038697A (en) | Automatic rescue and charging system for elevator drive | |
| JPH04286587A (en) | Linear motor type elevator control device | |
| JP2004175548A (en) | Elevator system | |
| CN220042978U (en) | Turntable safety protection circuit with safety torque turn-off function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |