A model predictive current control method for primary permanent magnet linear motor with five bridge arms and double movers based on double-layer positioning

Abstract

The invention discloses a five-arm double mover primary permanent magnet linear motor model prediction current control method based on double-layer positioning. The steps are as follows: S1: sampling the DC bus voltage, AB phase current, and mover operation of two movers Speed ​​and mover angle; S2: Calculate the reference voltage vectors of the two movers in the αβ coordinate system; S3: Project the reference voltage vector into a fixed global optimal space voltage vector distribution map, locate and select the motor layer The corresponding global optimal control vector; S4: Divide all combinations of the global optimal control vector into three cases; S5: Determine the inverter control signal according to the type of the global optimal control vector; S6: Input the control signal to In the inverter, the double mover primary permanent magnet linear motor is driven to run. The invention can obtain completely the same control effect as the traditional model predictive current control on the basis of significantly reducing the calculation amount of the model predictive current control of the primary permanent magnet linear motor with five bridge arms and double movers.

Description

technical field [0001] The invention relates to the technical field of motor drive and control, in particular to a model predictive current control method for a primary permanent magnet linear motor with five bridge arms and double movers based on double-layer positioning. Background technique [0002] Compared with the traditional three-phase inverter control system, the five-leg double mover primary permanent magnet linear motor drive system based on model predictive current control can reduce one-phase bridge arm, thereby reducing the system cost. However, the biggest weakness of model predictive current control is that the calculation amount of the system will increase geometrically with the increase of the system state quantity, which will affect the application range of model predictive current control. Contents of the invention [0003] Purpose of the invention: Aiming at the problem that the amount of calculation is too large in the process of predicting the curren...

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Problems solved by technology

[0003] Purpose of the invention: Aiming at the problem that the amount of calculation is too large in the process of predicting the current control of the traditional five-arm dual mover primary permanent magnet linear motor model, the present invention proposes a five-bridge dual mover primary permanent magnet based on double-layer positioning Model Predictive Current Control Method for Linear Motor

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