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PMSM (permanent-magnet synchronous motor) control system based on super-twisted SMC (sliding mode control) algorithm and work method of PMSM control system

A permanent magnet synchronous motor and control system technology, which is applied in the control system, motor control, vector control system, etc., can solve the problems of power factor reduction, leakage inductance and voltage drop increase, and the limitation of motor speed regulation range, etc., to eliminate Effects of chattering and increased approach speed

Inactive Publication Date: 2018-09-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent can improve the robustness and stability of the permanent magnet synchronous motor, the id=0 control algorithm has a simple control structure, is easy to implement, and has good torque control characteristics, but its defect is that when the torque is too large, the leakage inductance And the voltage drop will increase accordingly, resulting in a decrease in power factor, and in the absence of direct-axis current components, the speed range of the motor is greatly limited

Method used

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  • PMSM (permanent-magnet synchronous motor) control system based on super-twisted SMC (sliding mode control) algorithm and work method of PMSM control system
  • PMSM (permanent-magnet synchronous motor) control system based on super-twisted SMC (sliding mode control) algorithm and work method of PMSM control system
  • PMSM (permanent-magnet synchronous motor) control system based on super-twisted SMC (sliding mode control) algorithm and work method of PMSM control system

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Embodiment 1

[0089] A permanent magnet synchronous motor control system based on super twisted synchronous film variable structure algorithm, such as figure 2 As shown, it includes a first comparison unit 1, a first super twisted slide film control module 2, a park inverse transformation module 3, a SVPWM module 4, an inverter module 5, a second super twisted slide film control module 6, and a second comparison unit 7. Speed ​​regulator 8, third comparison unit 9, 3 / 2 conversion module 10, flux linkage torque estimation unit 11, permanent magnet synchronous motor module 12, speed calculation unit 13;

[0090] The permanent magnet synchronous motor module 12, the speed calculation unit 13, the third comparison unit 9, the speed regulator 8, and the second comparison unit 7 are sequentially connected, the inverter module 5, the 3 / 2 conversion module 10, and the flux linkage torque estimation unit 11 are connected sequentially, and the flux linkage torque estimation unit 11 is respectively con...

Embodiment 2

[0097] The working method of the permanent magnet synchronous motor control system based on the super-twisted synchronous film variable structure algorithm described in embodiment 1 includes:

[0098] (1) Calculate the rotational speed N of the permanent magnet synchronous motor module 12 by the speed calculation unit 13 r , the calculation formula is shown in formula (I):

[0099]

[0100] In formula (I), ω m refers to the mechanical angle of the permanent magnet synchronous motor module 12;

[0101] (2) Proportional-integral controller is used in the speed control outer loop module, and the given speed is obtained through the third comparison unit 9 and the rotational speed N obtained in step (1) r The difference, the difference is input to the speed regulator 8;

[0102] (3) Obtained by the speed regulator 8 is the torque comparison data obtained by the speed regulator 8; K p is the proportional coefficient, K i is the integral coefficient;

[0103] Get feedb...

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Abstract

The invention relates to a PMSM (permanent-magnet synchronous motor) control system based on a super-twisted SMC (sliding mode control) algorithm and a work method of the PMSM control system. The PMSMcontrol system comprises a first comparison unit, a first super-twisted SMC module, a park inverse transformation module, an SVPWM (space vector pulse width modulation) module, an inverter module, asecond super-twisted SMC module, a second comparison unit, a speed regulator, a third comparison unit, a 3 / 2 transformation module, a flux linkage torque estimation unit, a PMSM module and a speed calculation unit. A saturation function sat (s, delta) is introduced, so that not only can switching characteristics of a switching function be guaranteed, but also chattering and system discontinuity can be reduced. By regulating parameters of the first super-twisted SMC module and the second super-twisted SMC module, a power function works in a range of linearity, work of switching is avoided fundamentally, chattering caused by reaching motion of SMC is eliminated, and the system is endowed with global robustness.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor control system and a working method based on a super-twisted synchronous film variable structure algorithm, belonging to the technical field of motor control. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of high efficiency, high power density, fast dynamic response, strong robustness, and simple structure, and is widely used in electric vehicle control. However, the permanent magnet synchronous motor is a multi-variable nonlinear controlled object. There is coupling between its speed and stator current, and the influence of external disturbances such as load changes makes the control of high-performance motors difficult. [0003] Direct torque control (DTC) is an AC motor speed control scheme that appeared after vector control. Direct torque control is different from vector control. It directly uses stator flux and torque as control variables wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P25/022
CPCH02P21/0007H02P2207/05H02P25/024
Inventor 仉毅闻振璇万丽荣张鑫王亮张世同
Owner SHANDONG UNIV OF SCI & TECH
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