DC permanent magnet synchronous motor EBM A3G900 control circuit board

Abstract

The invention discloses an EBM A3G900 control circuit board of a direct current permanent magnet synchronous motor. The invention relates to an EBMA3G900 control circuit board of a direct-current permanent magnet synchronous motor. The EBMA3G900 control circuit board comprises an STM32F103VE single chip microcomputer, an IR2235J full-bridge drive circuit and an IGBT (Insulated Gate Bipolar Translator), the STM32F103VE single-chip microcomputer controls the IR2235J full-bridge drive circuit, then the IR2235J full-bridge drive circuit drives the IGBT, and the IGBT drives the motor. The STM32F103VE single-chip microcomputer is provided with a digital quantity input channel, a digital quantity output channel, an analog quantity input channel, a control interface, a communication interface, a power supply system and a related peripheral circuit. When the EBM A3G990 is repaired, if the circuit board cannot be repaired, the circuit board can be replaced by the circuit board, so that the basic functions of the original motor are realized.

Description

Technical Field

[0001] The invention relates to the technical field of direct current permanent magnet synchronous motor control, and in particular to a direct current permanent magnet synchronous motor EBM A3G900 control circuit board. Background Art

[0002] The external air cooling system of the smoothing reactor of a converter station adopts the outer rotor EC motor of EBMpapst Company in Germany, model A3G900-AZ0305. Since the fan is in a rotating state for a long time, many motors have stopped operating due to faults since it was put into operation. The motor is a 12-slot 10-pole permanent magnet, inductive DC brushless motor with a built-in variable frequency control board. The motor is controlled by rectification, inverter circuit, feedback circuit, switching power supply, etc. The number of revolutions is controlled by adjusting the PWM duty cycle, and it can communicate with the host computer to link multiple motors. It is mostly used in precision air conditioning systems. Through the disassembly inspection of the faulty motor, the control board of most motors is burned and the Hall element is damaged, and the motor coil is partially intact. However, EBM Company usually only sells the whole machine to the supporting factory and does not provide accessories. Therefore, it is necessary to propose a DC permanent magnet synchronous motor EBM A3G900 control circuit board to solve the above problems. Summary of the invention

[0003] The invention provides a control circuit board of a DC permanent magnet synchronous motor EBM A3G900. When the circuit board cannot be repaired, the control circuit board can be used to replace the original motor to realize the basic functions of the original motor.

[0004] The invention provides a direct current permanent magnet synchronous motor EBMA3G900 control circuit board, comprising: an STM32F103VE single-chip microcomputer, an IR2235J full-bridge drive circuit and an IGBT; the STM32F103VE single-chip microcomputer controls the IR2235J full-bridge drive circuit, and the IR2235J full-bridge drive circuit drives the IGBT, and the IGBT drives the motor; the STM32F103VE single-chip microcomputer is provided with a digital quantity input channel, a digital quantity output channel, an analog quantity input channel, a control interface, a communication interface, a power supply system and related peripheral circuits.

[0005] Furthermore, there is only one interface between the engineering data set and the PWM control module, which is the current frequency data; the PWM module automatically calculates the current electrical angle and the duty cycle of each phase according to the current frequency, and this function is implemented in the TIM1 update interrupt.

[0006] Furthermore, all input quantities are filtered, de-jittered, and stored in the engineering data set.

[0007] Furthermore, the engineering data set stores initialization parameters and current fault information, and exchanges information with the RS232 serial port and the fault storage module.

[0008] Furthermore, the output information is stored in the engineering data set and output externally at the same time.

[0009] Furthermore, the TIM1_UPDATE() interrupt that directly controls the IGBT is configured as a high priority and cannot be interrupted by other interrupts, including serial port communication and systick clock.

[0010] The invention has the following beneficial effects: a control circuit board of a direct current permanent magnet synchronous motor EBMA3G900 of the invention comprises: an STM32F103VE single-chip microcomputer, an IR2235J full-bridge drive circuit and an IGBT; the STM32F103VE single-chip microcomputer controls the IR2235J full-bridge drive circuit, and the IR2235J full-bridge drive circuit drives the IGBT, and the IGBT drives the motor; the STM32F103VE single-chip microcomputer is provided with a digital quantity input channel, a digital quantity output channel, an analog quantity input channel, a control interface, a communication interface, a power supply system and related peripheral circuits; when repairing an EBM A3G990, if the circuit board cannot be repaired, the board can be used to replace it, so as to realize the basic functions of the original motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 A schematic diagram of a control circuit board of a DC permanent magnet synchronous motor EBMA3G900 provided by the present invention. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below in conjunction with the drawings.

[0014] See also Figure 1The present invention provides a DC permanent magnet synchronous motor EBMA3G900 control circuit board, comprising: an STM32F103VE single-chip microcomputer, an IR2235J full-bridge drive circuit and an IGBT. KEIL writes a program to realize the 6-step commutation of the DC brushless motor. The STM32F103VE single-chip microcomputer controls the IR2235J full-bridge drive circuit. The STM32F103VE single-chip microcomputer generates a control signal through its internal control algorithm and PWM control module. After the signal is processed, it is sent to the IR2235J full-bridge drive circuit. The IR2235J full-bridge drive circuit then drives the IGBT. The IR2235J full-bridge drive circuit is a three-phase bridge power drive chip that integrates functions such as logic control, high and low side drive and protection. The chip receives the control signal from the STM32F103VE single-chip microcomputer and converts it into a drive signal that can drive the IGBT to work. IGBT drives the motor. The STM32F103VE microcontroller is equipped with digital input channels, digital output channels, analog input channels, control interfaces, communication interfaces, power supply systems and related peripheral circuits.

[0015] There is only one interface between the engineering data set and the PWM control module, which is the current frequency data; the PWM module calculates the current electrical angle and the duty cycle of each phase according to the current frequency. This function is implemented in the TIM1 update interrupt.

[0016] The PWM control module contains a timer TIM1 and a comparator. The timer generates a timing interrupt, and the comparator calculates the PWM waveform of each cycle based on the current frequency and preset PWM waveform parameters, such as duty cycle and phase. In the TIM1 update interrupt, the PWM control module updates the electrical angle and duty cycle of each phase according to the current frequency, thereby achieving precise control of the motor.

[0017] All input quantities are filtered and de-jittered and then stored in the engineering data set. Digital quantities include: fan control, forward rotation, reverse rotation, etc. Analog quantities include: voltage, current, etc.

[0018] The engineering data set stores initialization parameters and current fault information, and exchanges information with the RS232 serial port and fault storage module. The engineering data set is a memory area that stores various important data, including the motor initialization parameters such as rated voltage, rated current, etc., current fault information such as overcurrent, overheating, etc., and real-time data such as current and voltage fed back by sensors. These data communicate with external devices through the RS232 serial port, and can also be persistently stored through the fault storage module. The output information is stored in the engineering data set and output to the outside at the same time.

[0019] The TIM1_UPDATE() interrupt that directly controls the IGBT is configured as a high priority and cannot be interrupted by other interrupts, including serial communication and systick clock. Since the switching state of the IGBT directly determines the operating state of the motor, the priority of the TIM1_UPDATE() interrupt is set to the highest to ensure that the switching state of the IGBT can be controlled in a timely and accurate manner under any circumstances. This design ensures that the motor can maintain stable performance when running at high speed or when the load changes suddenly. Serial communication is usually used for data exchange and debugging with external devices, while the systick clock is used to generate the heartbeat signal of the system and provide a time reference. Although these interrupts are also important in the system, they need to be temporarily shielded during the execution of the TIM1_UPDATE() interrupt that directly controls the IGBT to ensure that the control signal of the motor is not interfered with. The main process functions are shown in Table 1.

[0020] Table 1 Main process functions Task Function Execution cycle ms Maximum single execution time μs Macf_input Digital input acquisition and filtering 30 10 Macf_out Digital output 40 20 Macf_AD Analog signal input, filtering 2 50 Macf_time Timing 1000 5 Macf_flash Recording failures 73 5 In summary, when repairing EBM A3G990, if the circuit board cannot be repaired, this board can be used as a replacement to achieve the basic functions of the original motor. In actual use, the circuit board is connected to 380V AC power and the output terminal is connected to the EBM motor, without other configuration.

[0021] The above-described embodiments of the present invention do not limit the protection scope of the present invention.

Claims

1. A DC permanent magnet synchronous motor EBMA3G900 control circuit board, characterized in that: include: STM32F103VE single-chip microcomputer, IR2235J full-bridge drive circuit and IGBT; the STM32F103VE single-chip microcomputer controls the IR2235J full-bridge drive circuit, and the IR2235J full-bridge drive circuit drives the IGBT, and the IGBT drives the motor; the STM32F103VE single-chip microcomputer is provided with a digital quantity input channel, a digital quantity output channel, an analog quantity input channel, a control interface, a communication interface, a power supply system and related peripheral circuits.

2. A DC permanent magnet synchronous motor EBMA3G900 control circuit board as claimed in claim 1, characterized in that: There is only one interface between the engineering data set and the PWM control module, which is the current frequency data; the PWM module calculates the current electrical angle and the duty cycle of each phase according to the current frequency. This function is implemented in the TIM1 update interrupt.

3. A DC permanent magnet synchronous motor EBMA3G900 control circuit board as claimed in claim 1, characterized in that: All input quantities are filtered and de-jittered and then stored in the engineering data set.

4. A DC permanent magnet synchronous motor EBMA3G900 control circuit board as claimed in claim 1, characterized in that: The engineering data set stores initialization parameters and current fault information, and exchanges information with the RS232 serial port and fault storage module.

5. A DC permanent magnet synchronous motor EBMA3G900 control circuit board as claimed in claim 1, characterized in that: The output information is stored in the project dataset and output externally at the same time.

6. A DC permanent magnet synchronous motor EBMA3G900 control circuit board as claimed in claim 1, characterized in that: The TIM1_UPDATE() interrupt that directly controls the IGBT is configured as a high priority and cannot be interrupted by other interrupts, including serial port communication and systick clock.

Images