CN210958222U

CN210958222U - Permanent magnet synchronous motor control system

Info

Publication number: CN210958222U
Application number: CN201920468676.1U
Authority: CN
Inventors: 朱亦玮; 张湃; 杨书林; 李鸿芳; 尹建军; 徐立增
Original assignee: Teku Electronic Equipment Shanghai Co ltd
Current assignee: Teku Electronic Equipment Shanghai Co ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-07-07
Anticipated expiration: 2029-04-09

Abstract

The utility model discloses a PMSM control system, including floating point microcontroller, be equipped with digital processing chip, logic processing chip FPGA in the floating point microcontroller, be equipped with the PWM module on the digital processing chip, the digital processing chip passes through PWM module and logic processing chip FPGA communication connection, be equipped with the CAN module on the digital processing chip, the digital processing chip passes through the CAN module is connected with synchronous machine control, be equipped with the ADC module that is used for gathering generating line electric current, phase current and temperature information on the digital processing chip. The utility model provides a PMSM control system for solve the motor operation time because the change of temperature, resistance change can be very big, and magnetic circuit probably also can saturate during control, leads to the great problem scheduling problem of systematic error.

Description

Permanent magnet synchronous motor control system

Technical Field

The utility model relates to a PMSM control technical field, concretely relates to PMSM control system.

Background

The permanent magnet synchronous motor control system is an important subsystem in an electric automobile system. As a widely used motor at present, a permanent magnet synchronous motor has no brush and commutator, so that a proper control method has to be found, and the rotor magnetic field orientation control is a better control mode for the motor.

At present, PMSM control is mostly based on a motor model, resistance change can be large due to temperature change when a motor operates, a magnetic circuit can be saturated possibly during control, the error ratio of a system is large due to the resistance change, the model can be greatly changed during operation, and the steady-state and dynamic operation performance of the system can be reduced during torque control and wide-speed regulation.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a permanent magnet synchronous machine control system for solve the motor operation time because the change of temperature, resistance change can be very big, and the magnetic circuit probably also can saturate during the control, leads to the great problem of systematic error to and the very big change can take place for the model during operation, can reduce the steady state of system and the problem of dynamic behavior when torque control and wide-speed governing.

In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a permanent magnet synchronous motor control system, including TMS320F28379 floating point microcontroller, be equipped with digital processing chip F28379DSP, logic processing chip FPGA in the TMS320F28379 floating point microcontroller, be equipped with the PWM module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through PWM module and logic processing chip FPGA communication connection, be equipped with the CAN module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through the CAN module is connected with synchronous machine control, be equipped with the ADC module that is used for gathering bus current, phase current and temperature information on the digital processing chip F28379 DSP.

In a further improvement, the digital processing chip F28379DSP is connected with an EEPROM module.

Compared with the prior art, the utility model discloses in, gather busbar current, phase current and temperature information through the ADC module, use PWM module output pulse width modulation ripples to logic processing chip FPGA, logic processing chip FPGA is according to this wave form control rectifier bridge, again according to accepting volume fault signal, handles the analysis and carries out fault protection and feedback fault information to digital processing chip F28379DSP in, digital processing chip F28379DSP controls the motor again, has very high practical value.

Drawings

Fig. 1 is a schematic circuit diagram of a permanent magnet synchronous motor control system;

fig. 2 is a connection block diagram of a permanent magnet synchronous motor control system.

Detailed Description

In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.

As shown in fig. 1, 2, the utility model relates to a permanent magnet synchronous motor control system, including TMS320F28379 floating point microcontroller, be equipped with digital processing chip F28379DSP in the TMS320F28379 floating point microcontroller, logic processing chip FPGA, be equipped with the PWM module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through the PWM module and logic processing chip FPGA communication connection, be equipped with the CAN module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through the CAN module and is connected with synchronous machine control, be equipped with on the digital processing chip F28379DSP and be used for gathering the generating line electric current, phase current and temperature information's ADC module.

The digital processing chip F28379DSP is connected with the EEPROM module, and the information to be reserved when the power is down is stored through the EEPROM module.

In addition, the execution process is as follows:

1: the ADC module of the digital processing chip F28379DSP samples the motor phase currents simultaneously.

2: the phase current acquired by the digital processing chip F28379DSP is converted into static three-phase current in a coordinate system through CLARKE.

3: the static two-phase current converted by CLARKE is converted into dynamic two-phase current rotating along with the rotor through PARK, and the control quantity (iq, ids) from the (abc/dq) module in the figure 2 is obtained.

And 4, under a rotor reference coordinate system, using the d-axis voltage reference value and the q-axis voltage reference value to be respectively equal to the d-axis voltage and the q-axis voltage of the motor, so that the system does not need a voltage sensor, and replacing the measured value of the motor voltage with the voltage sensor, so that the maximum voltage (Vs) which can be output by the inverter can be calculated according to the detected bus voltage as long as the bus voltage is detected. It is then determined that the resultant d-and q-axis voltage vectors are compared to the calculated Vs:

a if the resulting voltage is less than the calculated Vs, then let id be zero. The torque components are all proportional to the iq current value.

b, if the synthesized voltage is larger than the calculated Vs, the needed voltage is higher than the DC bus voltage of the inverter input, in this case, in order to stably work at the maximum voltage, a demagnetization current id must be added, so that the q-axis input voltage is reduced, and the d-axis voltage is increased, which is equivalent to transferring the q-axis voltage to the d-axis. Thereby keeping the resultant voltage vector of the d-axis and the q-axis within a set maximum voltage range.

The synthesized food intake of q-axis and d-axis voltages is compared with the maximum voltage which can be output by the inverter, the error is amplified by a PI controller, the signal is subjected to amplitude limiting processing and then used for generating a d-axis current reference value, the polarity of the reference value is negative, and the generated d-axis current and the amplification error are in a proportional relation on the amplitude value or in a corresponding relation of other curves. And calculating the reference value of the q-axis current by the obtained d-axis current reference value and the torque given value Te through MTPA.

And 5, comparing the reference value of the q-axis current and the d-axis current with the corresponding measured value to obtain the error of the current. And the error input current loop PI controller amplifies the reference value of q-axis and d-axis voltage under a rotor reference coordinate system.

6: and converting the reference value of q-axis and d-axis voltages in the rotor reference coordinate system into a voltage value in the stator coordinate system through inverse PARK conversion so as to realize space vector modulation of the inverter.

To sum up, the utility model relates to a PMSM control system need not use motor model, just also can not lead to the parameter value to change because of the environmental change to influence motor operation system's stable state and dynamic behavior. Any parameter of the motor body is not used, so that the robustness and the adaptability are better, and the practical value is very high.

The above description has been made of specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. The utility model provides a permanent magnet synchronous motor control system, its characterized in that, includes TMS320F28379 floating point microcontroller, be equipped with digital processing chip F28379DSP, logic processing chip FPGA in the TMS320F28379 floating point microcontroller, be equipped with the PWM module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through PWM module and logic processing chip FPGA communication connection, be equipped with the CAN module on the digital processing chip F28379DSP, digital processing chip F28379DSP passes through the CAN module is connected with synchronous machine control, be equipped with the ADC module that is used for gathering busbar current, phase current and temperature information on the digital processing chip F28379 DSP.

2. The permanent magnet synchronous motor control system according to claim 1, wherein the digital processing chip F28379DSP is connected with an EEPROM module.