PMSM speed regulation system variable reaching law sliding mode control method considering iron loss

Abstract

The invention discloses a PMSM speed regulation system variable reaching law sliding mode control method considering iron loss, and relates to the technical field of minimum loss speed regulation of a permanent magnet synchronous motor, and the method comprises the steps: taking iron loss torque as a link, and designing a PMSM sliding mode speed controller under a minimum loss target; firstly, a minimum loss point d-axis current compensation method based on virtual loss power Taylor series expansion is provided so as to realize motor minimum loss control under different working conditions; secondly, in order to eliminate the influence of the iron loss on the speed regulation performance, a PMSM rotating speed tracking model containing the iron loss is established, and minimum loss control and rotating speed control are associated; a self-adaptive sliding mode reaching law based on interference estimation is provided, system energy consumption and sliding mode buffeting caused by too high sliding mode gain are avoided, and the speed of a sliding mode surface is achieved by adjusting the system state to weaken buffeting. In addition, buffeting is effectively reduced by adding the switching function to the derivative of the control quantity, and rapid following of the set rotating speed in the uncertain environment is achieved.

Description

Variable reaching law sliding mode control method for PMSM speed control system considering iron loss technical field The present invention relates to considering iron loss permanent magnet synchronous motor speed control field, mainly relate to a kind of considering iron loss situation The variable reaching law sliding mode control method of the permanent magnet synchronous motor speed control system under the condition. Background technique Permanent magnet synchronous motor (permanent magnet synchronous motor, PMSM) has high efficiency, structure Simple, strong overload capacity, easy to maintain, etc., are widely used in robotics, electric vehicles, medical equipment, aerospace and other fields. a wide range of applications. In general, in order to obtain maximum power density and minimum copper loss, the number of pole pairs of PMSM is often larger than that of PMSM. Asynchronous motors have a large number of pole pairs. Therefore, when the rotor speed is the ...

AI Technical Summary

Problems solved by technology

Because the mathematical model ignoring the iron loss cannot reflect the actual operating conditions of the motor, the control strategy derived on this basis will inevitably show its limitations in practical applications

In addition, there are various uncertain disturbances in the speed control of PMSM, which affect the improvement of PMSM speed regulation performance.

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