CN215734069U

CN215734069U - Miniaturized motor controller circuit

Info

Publication number: CN215734069U
Application number: CN202121949311.4U
Authority: CN
Inventors: 王零超; 何勇
Original assignee: Chengdu Electric Mfg Co
Current assignee: Chengdu Electric Mfg Co
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-01
Anticipated expiration: 2031-08-19

Abstract

The utility model relates to a miniature motor controller circuit, which comprises a main control chip, a motor driving chip, a communication module and a power supply conversion module, wherein the main control chip is connected with the motor driving chip; the six logic control signals output by the main control chip are connected to six logic signal input ends of the motor driving chip; the three-phase output end of the motor driving chip is connected with the three-phase input end of the permanent magnet synchronous motor; the power supply output end of the power supply conversion module is respectively connected with the power supply input ends of the main control chip and the communication module, and the main control chip is connected with the communication module. The main control chip MP6570 and the motor drive chip MP6540 adopted by the utility model are both high-integration chips and are packaged in small size. Compared with the traditional motor controller framework, the size of the PCB is greatly reduced, and the trend of future miniaturization development of a motor control system is met. In addition, the motor controller has complete functions, ideal performance and excellent application and popularization prospects.

Description

Miniaturized motor controller circuit

Technical Field

The utility model relates to the technical field of motor control, in particular to a miniature motor controller circuit.

Background

In recent years, the application range of motors is wider and wider, and along with the widening of the application range, higher and higher requirements are put on a motor control system. The motor control system is certainly developed towards miniaturization, intellectualization and cost reduction.

The traditional motor controller design circuit mostly adopts a main control chip + pre-driving + driving framework, the integration level is very low, the size of a PCB is very large, the system integration design is not facilitated, and the requirement of miniaturization of a motor control system can not be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, provides a miniaturized motor controller circuit, and overcomes the defects of a traditional motor controller circuit adopting a main control chip + pre-driving + driving framework.

The purpose of the utility model is realized by the following technical scheme: a miniaturized motor controller circuit comprises a main control chip, a motor driving chip, a communication module and a power supply conversion module; the six logic control signals output by the main control chip are connected to six logic signal input ends of the motor driving chip; the three-phase output end of the motor driving chip is connected with the three-phase input end of the permanent magnet synchronous motor; the power supply output end of the power supply conversion module is respectively connected with the power supply input ends of the main control chip and the communication module, and the main control chip is connected with the communication module.

The main control chip comprises a chip U1 with the model number of MP6570, pins TX, RX and REN of the chip U1 are connected with the communication module, pins ENA, ENB, ENC, PWMA, PWMB and PWMC of the chip U1 output six logic control signals to the motor driving chip, and pins ISA, ISB and ISC are connected with current sampling signals output by the motor driving chip.

The motor driving chip is internally integrated with a three-phase half bridge, a pre-driver, a grid driving power supply and a current sampling amplifier; the three-phase half-bridge consists of 6N-channel power MOSFETs.

The input power supply is connected with the grid driving power supply, the grid driving power supply is connected with the pre-driver, the pre-driver is connected with the three-phase half bridge, the output end of the three-phase half bridge is connected with the three-phase input end of the permanent magnet synchronous motor, the current sampling amplifier is connected with the current signal output end of the permanent magnet synchronous motor, and the current sampling signal is input into the main control chip.

The motor driving chip comprises a chip U10 with the model of MP6540, pins 3 to 8 of the chip U10 are logic control signal input ends and are connected with a logic signal output end of the main control chip, and

pins

22, 24 and 26 are three-phase half-bridge output ends and are connected with a three-phase input end of the permanent magnet synchronous motor.

The packaging size of the main control chip is 4mm multiplied by 4mm, and the packaging size of the motor driving chip is 5mm multiplied by 5 mm.

The utility model has the following advantages: a main control chip MP6570 and a motor drive chip MP6540 adopted by the miniature motor controller circuit are high-integration chips and are packaged in a small mode. Compared with the traditional motor controller framework, the size of the PCB is greatly reduced, and the trend of future miniaturization development of a motor control system is met. In addition, the motor controller has complete functions, ideal performance and excellent application and popularization prospects.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a pin connection diagram of a main control chip;

FIG. 3 is a pin connection diagram of a communication chip;

fig. 4 is a pin connection diagram of the motor driving chip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application provided below in connection with the appended drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, the present invention relates to a miniaturized motor controller circuit, which comprises a main control chip, a motor driving chip, a communication module and a power conversion module; the six logic control signals output by the main control chip are connected to six logic signal input ends of the motor driving chip; the three-phase output end of the motor driving chip is connected with the three-phase input end of the permanent magnet synchronous motor; the power supply output end of the power supply conversion module is respectively connected with the power supply input ends of the main control chip and the communication module, and the main control chip is connected with the communication module.

The main control chip MP6570GR is packaged by QFN-32(4mm multiplied by 4mm), integrates a magnetic field orientation vector control algorithm, an SVPWM modulation technology and a high-precision angle sensor, saves software program compiling and a hardware design circuit of the magnetic angle sensor, and greatly reduces the size of a PCB. The motor driving chip MP6540HGU-A is packaged by QFN-26(5mm multiplied by 5mm), and integrates a three-phase half bridge consisting of 6N-channel power MOSFETs, a pre-driver, a grid driving power supply and a current sampling amplifier. The 6 paths of logic control signals output by the main control chip MP6570 are connected to the 6 paths of logic control signal input ends of the motor drive chip MP6540, the three-phase output end of the motor drive chip MP6540 is connected with the three-phase input end of the permanent magnet synchronous motor, and the main control chip MP6570 is in communication connection with the RS-485.

As shown in fig. 2 and fig. 3, the TX, RX, REN pins of the main control chip MP6570 are RS-485 communication pins, DIR is a direction control pin, EN is a chip enable pin, 6 pins are external analog quantity speed regulation pins, nFT is a fault pin, ENA, ENB, ENC, PWMA, PWMB, PWMC are logic control pins, and are respectively connected to the logic input terminal of the motor driving chip MP 6540. ISA, ISB, ISC are current sampling signal pins. The pins TX, RX and REN of the main control chip MP6570 are respectively connected to the pin 4, the pin 1 and the pin 2/3 of the communication chip U3, the pin 2/3 of the communication chip U3 is an enabling control end of RS-485 communication, and A, B in the figure 3 is respectively connected to an upper computer, so that flexible configuration of parameters is realized through the upper computer.

As shown in fig. 4, pins 3-8 of the motor driver MP6540HGU-a are logic control signal input terminals, the logic control input terminals are amplified by an internal pre-driver and then output driving models for driving a three-phase half-bridge, and U, V, W is an output terminal of the three-phase half-bridge in the figure. The grid driving power supply supplies power to the built-in pre-driver. The current sampling amplifier is used for amplifying the collected current signal, and the ISA, ISB and ISC are output ends of the current sampling amplifier in the figure.

The working process of the utility model is as follows: an input 12V power supply is divided into two paths: one path is used as power electricity to supply power for the motor driving chip MP 6540; the other path is used as control power, and 3.3V voltage is output through power supply conversion to supply power for the communication between the main control chip MP6570 and the RS-485. The master control chip MP6570 is internally provided with a high-precision magnetic angle sensor for feeding back the position information and the speed information of the rotor in real time. The main control chip MP6570 performs speed loop PID control according to the current speed feedback information and the target speed information, and takes the output result as the given value of the current loop PID control. The current sampling amplifier is arranged in the motor driving chip MP6540, and can feed back current information in real time and transmit the current information to the main control chip MP 6570. The main control chip MP6570 outputs 6 paths of PWM control signals through current loop PID and SVPWM modulation technology, and the output 6 paths of PWM control signals are connected with the logic signal input end of the motor drive chip MP 6540. The motor driving chip MP6540 integrates a three-phase half-bridge composed of 6N-channel power MOSFETs, and the output ends of the three-phase half-bridge are respectively connected with the three-phase input end of the permanent magnet synchronous motor. The main control chip MP6570 is provided with a direction control pin, so that the forward and reverse rotation functions of the permanent magnet synchronous motor can be conveniently realized. Parameters can be flexibly configured through RS-485 communication, and the precise control of the permanent magnet synchronous motor is realized.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A miniaturized motor controller circuit, characterized by: the device comprises a main control chip, a motor driving chip, a communication module and a power supply conversion module; the six logic control signals output by the main control chip are connected to six logic signal input ends of the motor driving chip; the three-phase output end of the motor driving chip is connected with the three-phase input end of the permanent magnet synchronous motor; the power supply output end of the power supply conversion module is respectively connected with the power supply input ends of the main control chip and the communication module, and the main control chip is connected with the communication module.

2. A miniaturized motor controller circuit according to claim 1, characterized in that: the main control chip comprises a chip U1 with the model number of MP6570, pins TX, RX and REN of the chip U1 are connected with the communication module, pins ENA, ENB, ENC, PWMA, PWMB and PWMC of the chip U1 output six logic control signals to the motor driving chip, and pins ISA, ISB and ISC are connected with current sampling signals output by the motor driving chip.

3. A miniaturized motor controller circuit according to claim 1, characterized in that: the motor driving chip is internally integrated with a three-phase half bridge, a pre-driver, a grid driving power supply and a current sampling amplifier; the three-phase half-bridge consists of 6N-channel power MOSFETs.

4. A miniaturized motor controller circuit according to claim 3, characterized in that: the input power supply is connected with the grid driving power supply, the grid driving power supply is connected with the pre-driver, the pre-driver is connected with the three-phase half bridge, the output end of the three-phase half bridge is connected with the three-phase input end of the permanent magnet synchronous motor, the current sampling amplifier is connected with the current signal output end of the permanent magnet synchronous motor, and the current sampling signal is input into the main control chip.

5. A miniaturized motor controller circuit according to claim 4, characterized in that: the motor driving chip comprises a chip U10 with the model of MP6540, pins 3 to 8 of the chip U10 are logic control signal input ends and are connected with a logic signal output end of the main control chip, and pins 22, 24 and 26 are three-phase half-bridge output ends and are connected with a three-phase input end of the permanent magnet synchronous motor.

6. A miniaturized motor controller circuit according to any of claims 1-5, characterized in that: the packaging size of the main control chip is 4mm multiplied by 4mm, and the packaging size of the motor driving chip is 5mm multiplied by 5 mm.