Incremental direct prediction speed control method suitable for permanent magnet motor system

Abstract

The invention discloses an incremental direct prediction speed control method suitable for a permanent magnet motor system. The incremental direct prediction speed control method mainly comprises an incremental speed prediction model, two-stage exhaustion optimization and a boundary vector synthesis method. The incremental speed prediction model established by adopting an incremental modeling method can greatly reduce the multi-step prediction calculation amount while meeting the speed prediction precision. According to two-stage exhaustion optimization, the determination of a system output vector from an expansion control set is completed by two steps, so that an exhaustion optimization method corresponding to the expansion control set is designed. According to the boundary vector synthesis method, the amplitudes and phase angles of all virtual vectors in a control set can be determined on the basis of only utilizing a basic voltage vector without complex trigonometric function operation. According to the invention, the excellent rotating speed dynamic control performance in the prior art can be kept, the online calculation amount for achieving multi-step speed prediction can be greatly reduced, and the stability of prediction speed control is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and relates to a non-cascade speed control scheme based on an incremental direct predictive speed control method, more specifically, to an incremental method suitable for permanent magnet motor systems. Direct predictive velocity control method. Background technique [0002] Permanent magnet motors have the advantages of simple structure, high specific power, and wide speed range, and have been widely used in precision CNC machine tools, high-speed locomotive traction, and artificial intelligence. The speed control algorithm of permanent magnet motor usually adopts a cascaded control structure with the current loop as the inner loop and the speed loop as the outer loop. The dynamic response speed of the motor speed. Finite set predictive control is a suitable scheme for constructing non-cascaded direct speed control structure of permanent magnet motor because ...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the classical speed prediction model, there is still a lack of mature methods to implement the predictive speed control strategy based on the expanded control set

In addition, due to the absence of PI controllers and integral effects, DPSCs are less resistant to parameter disturbances

Images