Artificial bee colony parameter optimization-based direct torque control method for alternating-current asynchronous motor slip film variable structure

Abstract

The invention relates to the technical field of alternating-current asynchronous motor control, and particularly relates to an artificial bee colony parameter optimization-based direct torque controlmethod for an alternating-current asynchronous motor slip film variable structure. The artificial bee colony parameter optimization-based direct torque control method for the alternating-current asynchronous motor slip film variable structure specifically comprises the following steps of establishing a stator flux linkage equation, an electromagnetic torque equation and a magnetic chain amplitudesquare expression of an alternating-current asynchronous motor; establishing a direct torque controller equation of the slip film variable structure; designing a calculation method for calculating thetarget function and the fitness value of an artificial bee colony optimization algorithm; initializing a nectar source position of a standard artificial bee colony algorithm; and finally, determiningthe parameters of a slide film variable structure controller equation through the search of the standard artificial bee colony. According to the method, a torque and magnetic chain slip film variablestructure-based controller is designed to replace a traditional direct torque controller. Meanwhile, the optimal parameters of the slip film variable structure-based controller are determined throughthe search of the artificial bee colony. Therefore, the variable-frequency speed regulation performance of the alternating-current asynchronous motor is effectively improved.

Description

technical field [0001] The invention relates to the technical field of AC asynchronous motor control, in particular to an AC asynchronous motor synovial film variable structure direct torque control method based on artificial bee colony parameter optimization. Background technique [0002] The direct torque control of the AC motor is another high-performance AC speed regulation method developed after the vector control. Compared with the vector control, the direct torque control saves the cumbersome coordinate changes, and adopts the method that is not subject to the change of the rotor parameters. The orientation of the stator flux linkage affected by the flux linkage and the torque hysteresis controller can directly control the switching state of the inverter optimally, which has the advantages of simple control structure, direct control means, and rapid torque response. It has been widely used in high-speed systems. However, direct torque control also has relatively obvi...

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Problems solved by technology

However, direct torque control also has relatively obvious defects. On the one hand, due to the use of two-point flux linkage and torque hysteresis controller, there will be problems such as excessive output torque ripple and unstable switching frequency of the inverter; On the one hand, since the stator flux linkage is estimated by measuring the stator resistance, there will be obvious flux linkage estimation errors during low-speed operation, which will affect the speed regulation performance

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