Speed and current double-closed-loop fuzzy control-based PMSM sensorless control method

A speed controller and fuzzy control technology, applied in the direction of motor control, motor generator control, control of electromechanical brakes, etc., can solve the problem that the PI controller cannot guarantee dynamic performance, etc. Interference ability, effect of improving sensorless control performance

Active Publication Date: 2021-09-03
HUNAN UNIV OF SCI & TECH
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Problems solved by technology

Therefore, PI controllers cannot guarantee reasonable dynamic performance over the entire operating range

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  • Speed and current double-closed-loop fuzzy control-based PMSM sensorless control method
  • Speed and current double-closed-loop fuzzy control-based PMSM sensorless control method
  • Speed and current double-closed-loop fuzzy control-based PMSM sensorless control method

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Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0059] Such as figure 1 As shown, a PMSM sensorless control method of speed and current double closed-loop fuzzy control, including the following steps:

[0060] 1) Establish the vector control mathematical model of the surface-mounted permanent magnet synchronous motor. The mathematical model of the surface-mounted permanent magnet synchronous motor based on the rotating coordinate system is as follows:

[0061]

[0062] Among them, R s is the stator resistance, u d , u q Respectively d, q axis stator voltage, i d i q Respectively d, q axis stator current, L d , L q Respectively d, q axis stator inductance, ω e is the electromagnetic speed, is the permanent magnet flux linkage.

[0063] 2) Establish fuzzy speed controller and fuzzy current controller to improve traditional PI controller based on double closed loop. Step 2) specifically ...

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Abstract

The invention discloses a speed and current double-closed-loop fuzzy control-based PMSM sensorless control method. The method comprises the following steps of: 1) establishing a vector control mathematical model of a surface-mounted permanent magnet synchronous motor; 2) establishing a fuzzy speed controller and a fuzzy current controller; and 3) establishing a model reference adaptive observer based on a switching PI controller. A traditional PI adaptive mechanism in the model reference adaptive observer is improved into the switching PI controller, and therefore, the robustness and accuracy of the observer can be improved. Compared with the prior art, the precision and the dynamic performance of PMSM sensorless control can be improved. The method is particularly suitable for systems with parameter change, low speed and sudden rotating speed change.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a sensorless control method based on a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have been widely used in electric vehicles, flywheel energy storage systems, and wind energy conversion systems due to their high efficiency and high torque density. Traditional PMSM speed control requires encoders, tachometers or other mechanical position sensors in space-constrained gearboxes. The use of mechanical sensors reduces the reliability of the system, increases the size of the motor, and also complicates the design of the motor. Therefore, sensorless control methods have received extensive attention. [0003] Robust and accurate multiparameter estimation is critical for sensorless drives at low speeds, since stator resistance varies with temperature and aging. Adaptive mechanisms for model reference adaptive systems (MRAS) typical...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/13H02P21/22H02P6/34H02P25/026H02P27/08
CPCH02P21/0017H02P21/001H02P21/13H02P21/22H02P6/34H02P25/026H02P27/08H02P2207/05
Inventor 刘朝华聂杰陈磊吴亮红吕明阳李小花张红强
Owner HUNAN UNIV OF SCI & TECH
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