CN212034013U

CN212034013U - High-rotating-speed brushless motor control circuit based on MP6532 chip

Info

Publication number: CN212034013U
Application number: CN201921952678.4U
Authority: CN
Inventors: 刘健; 阎宝君; 吴梦晗; 潘傲雪; 钟紫灿; 王世奇; 蔡一鸣; 易俊利
Original assignee: Wuhan Institute of Technology
Current assignee: Wuhan Institute of Technology
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-11-27
Anticipated expiration: 2029-11-12

Abstract

The utility model discloses a high rotational speed brushless motor control circuit based on MP6532 chip, including Power supply circuit, controller and peripheral circuit, protection circuit, fault indication circuit, drive circuit and hall circuit, the control chip of controller and peripheral circuit is the MP6532 chip of Monolithic Power Systems, and its overcurrent protection pin is connected protection circuit, fault indication pin are connected fault indication circuit, gate drive pin are connected drive circuit, chronogenesis and control logic pin are connected hall circuit, Power supply circuit does respectively controller and peripheral circuit, protection circuit, fault indication circuit, drive circuit and hall circuit Power supply. The utility model discloses simple structure, multiple functional can realize brushless motor even running control.

Description

High-rotating-speed brushless motor control circuit based on MP6532 chip

Technical Field

The utility model relates to a motor control technical field especially relates to a high rotational speed brushless motor control circuit based on MP6532 chip.

Background

At present, high-rotation-speed brushless motors have been widely used in many fields such as household appliances, automobile parts, medical equipment, aerospace equipment, industrial automation, and the like.

The existing high-rotation-speed brushless motor replaces the traditional mechanical electric brush and a commutator through an electronic commutation circuit, and can simply and efficiently realize the commutation function of a direct current motor; the stator driving current is usually square wave current, in order to make the motor output maximum torque, the air gap flux density of the motor is usually designed to be square wave or approximate square wave, and in addition, in order to improve the utilization rate of the winding, the stator winding of the brushless direct current motor is designed to be concentrated with a whole distance winding.

However, the above control circuit of the existing high-speed brushless dc motor generally has some disadvantages: firstly, the operation is unstable; secondly, the control function is insufficient.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a high rotational speed brushless motor control circuit based on MP6532 chip to the defect that control circuit operation is unstable, control function is not enough among the prior art.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model discloses a high rotational speed brushless motor control circuit based on MP6532 chip, including Power supply circuit, controller and peripheral circuit, protection circuit, fault indication circuit, drive circuit and hall circuit, the control chip of controller and peripheral circuit is the MP6532 chip of Monolithic Power Systems, and it overcurrent protection pin is connected protection circuit, fault indication pin are connected fault indication circuit, gate drive pin are connected drive circuit, chronogenesis and control logic pin are connected hall circuit, Power supply circuit does respectively controller and peripheral circuit, protection circuit, fault indication circuit, drive circuit and hall circuit Power supply.

According to the technical scheme, the protection circuit comprises two parallel small-resistance power resistors, and an anti-surge resistor is arranged between the power supply and the power end of the chip.

In connection with the above technical solution, the driving circuit is six switching power transistors, three half-bridge power modules, or an integrated three-phase power module.

According to the technical scheme, the Hall circuit comprises three Hall sensors, and a pull-up resistor and a filter capacitor are arranged at the Hall input ends of the Hall sensors.

According to the technical scheme, the power circuit is a multi-path voltage output power supply.

According to the technical scheme, the fault indicating circuit comprises a light emitting diode.

The utility model discloses the beneficial effect who produces is: the utility model provides a high rotational speed brushless motor control circuit based on MP6532 chip, through controller and peripheral circuit connection protection circuit, fault indication circuit, drive circuit and hall circuit, the control chip of controller and peripheral circuit is the MP6532 chip of Monolithic Power Systems, can realize protecting and indicating the trouble whole control circuit in drive brushless motor. The utility model discloses simple structure, multiple functional can realize brushless motor even running control.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1, the utility model provides a high rotational speed brushless motor control circuit based on MP6532 chip, including Power supply circuit 6, controller and peripheral circuit 4, protection circuit 1, fault indication circuit 2, drive circuit 3 and hall circuit 5, the control chip of controller and peripheral circuit 4 is the MP6532 chip of Monolithic Power Systems, and its overcurrent protection pin connects protection circuit 1, and fault indication pin connects fault indication circuit 2, and drive circuit 3 is connected to the grid drive pin, and hall circuit 5 is connected to chronogenesis and control logic pin, and Power supply circuit 6 does respectively controller and peripheral circuit 4, protection circuit 1, fault indication circuit 2, drive circuit 3 and hall circuit 4 Power supply.

Short-circuit protection and thermal turn-off protection are realized in the MP6532, and overcurrent protection and undervoltage protection can be realized through a simple peripheral circuit. In specific implementation, the overcurrent protection is realized by connecting a shunt resistor to an LSS pin and a low-side MOSFET source terminal of an MP6532 chip and monitoring the current from the low-side shunt resistor to the low-side MOSFETs, and the undervoltage lockout protection is realized when the power-on voltage of VIN is lower than an undervoltage lockout threshold value V_UVLOWhen the chip temperature exceeds the safe limit, MP6532 will enter a latch fault state and disable all functions.

When the motor is applied specifically, the controller and the peripheral circuit 2 receive external control signals such as a PWM signal, a DIR signal and an nBRAKE signal to control the motion of the motor. The PWM speed regulating signal is input from the outside to control the rotating speed of the motor, and the signal value is matched with the MP6532 chip. DIR signal can be input from outside, the level real-time control motor turns to by the level, also can be through the direct lock level value of circuit, and the concrete realization method is that adopting the resistance of suitable resistance to carry out pull-up or pull-down to the port. The nBRAKE signal is input from the outside to control the braking of the motor.

Further, the protection circuit 1 comprises two parallel low-resistance power resistors, an anti-surge resistor is arranged between the power supply and a chip power end, and the specific value is configured according to the voltage fluctuation condition of the actual power supply. Two power resistors with small resistance values are connected in parallel to acquire a current signal, so that the conversion from the current signal to a voltage signal is realized, and the current signal is input to a chip and compared with a chip overcurrent protection signal threshold value to judge whether overcurrent exists; the improved current signal acquisition mode with the parallel double resistors can realize the acquisition range and the acquisition precision which are larger than those of a single resistor by configuring the parameters of the two resistors.

Further, the driving circuit 3 is a six-switch power tube, three half-bridge power modules or an integrated three-phase power module.

Further, the hall circuit 5 includes three hall sensors, and the hall input ends of the hall sensors are provided with pull-up resistors and filter capacitors.

Further, the power circuit 6 is a multi-path voltage output power supply, and meets different power supply requirements of the controller and the peripheral circuit 4, the driving circuit 3 and the hall circuit 5 on voltage level and power.

Further, the fault indication circuit 2 includes a light emitting diode.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A high-rotation-speed brushless motor control circuit based on an MP6532 chip is characterized by comprising a Power supply circuit, a controller, a peripheral circuit, a protection circuit, a fault indication circuit, a driving circuit and a Hall circuit, wherein the control chip of the controller and the peripheral circuit is an MP6532 chip of Monolithic Power Systems, an overcurrent protection pin of the MP6532 chip is connected with the protection circuit, a fault indication pin of the MP6532 chip is connected with the fault indication circuit, a grid driving pin of the MP6532 chip is connected with the driving circuit, a time sequence and control logic pin of the MP6532 chip is connected with the Hall circuit, and the Power supply circuit supplies Power for the controller, the peripheral circuit, the protection circuit, the fault indication circuit, the driving circuit and the Hall circuit respectively;

two power resistors with small resistance values are connected in parallel to acquire a current signal, so that the conversion from the current signal to a voltage signal is realized, and the current signal is input to a control chip and compared with a chip overcurrent protection signal threshold value to judge whether overcurrent exists;

the over-current protection is realized by connecting a shunt resistor to an LSS pin and a source terminal of a low-side MOSFET of an MP6532 chip and monitoring the current from the low-side shunt resistor to the low-side MOSFETs, and the under-voltage lockout protection is realized when the power-on voltage of VIN is lower than an under-voltage lockout threshold value V_UVLOWhen the circuit in all the devices is disabled, the internal logic will be reset;

the protection circuit comprises two parallel low-resistance power resistors, and an anti-surge resistor is arranged between a power supply and a power end of the chip;

the driving circuit comprises six switching power tubes, three half-bridge power modules or an integrated three-phase power module;

the Hall circuit comprises three Hall sensors, and a pull-up resistor and a filter capacitor are arranged at the Hall input ends of the Hall sensors;

the power circuit is a multi-path voltage output power supply; the fault indication circuit includes a light emitting diode.