Switched reluctance motor fuzzy adaptive control system and method

A switched reluctance motor, fuzzy self-adaptive technology, applied in control systems, vector control systems, motor generator control, etc., can solve problems such as insufficient anti-interference ability, excessive overshoot, and low control accuracy

Inactive Publication Date: 2019-10-18
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In terms of controller selection, in order to easily realize the speed adjustment, the PID controller is usually used to act in the speed outer loop of the control

Method used

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  • Switched reluctance motor fuzzy adaptive control system and method
  • Switched reluctance motor fuzzy adaptive control system and method
  • Switched reluctance motor fuzzy adaptive control system and method

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[0048] The present invention will be further described below in conjunction with the drawings.

[0049] Combine figure 1 , The switch reluctance motor fuzzy adaptive control system of the present invention is a closed loop system, including fuzzy adaptive fractional PI controller 1, PWM module 2, asymmetric half-bridge drive circuit 3, switched reluctance motor motor 4, position detection module 5. Current detection module 6, torque calculation module 7 and speed detection module 8. The fuzzy adaptive fractional PI controller 1 includes derivative calculation module 9, fuzzy controller 10, fractional PI controller 11 and the controlled object 12, such as figure 2 Shown.

[0050] The fuzzy adaptive fractional PI controller 1 is used to process the speed error and its rate of change, and output a given torque value through PI adjustment;

[0051] The PWM module 2 is used for judging the conduction interval by the rotor position angle of the motor according to the error of the calcula...

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Abstract

The invention discloses a switched reluctance motor fuzzy adaptive control system and method. The system comprises a fuzzy adaptive fractional PI controller, a PWM module, an asymmetric half-bridge drive circuit, a switched reluctance motor, a position detection module, a current detection module, a torque calculation module and a rotation speed detection module. The method comprises the steps: input parameters are sent to the fuzzy controller for fuzzification and the output dynamic parameters are used as the input of the fractional PI controller, and then the parameters are adjusted and inputted to the controlled object for control; amplitude limiting calculation of the torque error of the switched reluctance motor is performed to obtain the duty cycle of PWM output pulse, the working region of each phase winding is judged according to the rotor position angle, and the switching state of the asymmetric half-bridge drive circuit is determined by the PWM direct torque control algorithm; and the motor operation is controlled by adjusting the voltage of each phase winding. The system and the method are simple and reliable and have high robustness and realizes reasonable adjustment ofthe motor speed and improves the dynamic operation performance of the system.

Description

technical field [0001] The invention relates to the technical field of switched reluctance motor control, in particular to a fuzzy adaptive control system and method for switched reluctance motors. Background technique [0002] At present, the hysteresis control method is generally used in the direct torque control control strategy of the switched reluctance motor. The control method is characterized by a simple algorithm and a wide range of applications. However, the hysteresis control method has certain requirements for the design of the hysteresis limit. If the hysteresis limit is set small, the torque response will be fast, which will easily cause shock to the system; if the hysteresis limit is set large, the purpose of optimizing torque ripple will not be achieved, and the system response will slow down. Therefore, the hysteresis control strategy is not the best choice. At the same time, there are torque and speed double closed loops in the direct instantaneous torque...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P25/092
CPCH02P21/001H02P21/0017H02P25/092
Inventor 余剑张俊芳张慧丽王晶王绍帅
Owner NANJING UNIV OF SCI & TECH
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