Predictive Controller and Construction Method for Bearingless Permanent Magnet Synchronous Motor

Abstract

The invention discloses a bearingless permanent magnet synchronous motor prediction controller and a construction method in the field of power drive control equipment. An output end of a Clark converter is connected to input ends of a torque winding flux linkage and torque initial observation module and a suspension force winding flux linkage initial observation module separately; the output end of the suspension force winding flux linkage initial observation module is connected to the input end of a suspension force winding flux linkage prediction module; the output end of the suspension force winding flux linkage prediction module is connected to the input end of a suspension force observation module; the output end of the torque winding flux linkage and torque initial observation module is connected to the input ends of a torque winding flux linkage and torque prediction module and a torque and voltage conversion module separately; and the output end of the torque winding flux linkage and torque prediction module is connected to the input ends of the suspension force observation module, the torque and voltage conversion module and a suspension force and voltage conversion module separately. Values of flux linkage, torque and suspension force in the next period are predicted through the flux linkage and the torque in a current sampling period, so that the problem caused by time delay is solved.

Description

technical field [0001] The invention belongs to the technical field of electric drive control equipment, and relates to a multi-variable, nonlinear, strong coupling, bearingless permanent magnet synchronous motor, which is used in sealed pumps, high-speed precision machining, aerospace, flywheels, etc. Energy storage, life science, vacuum technology and other fields have a wide range of applications, and are suitable for high-performance control of various bearingless motors. By decoupling the motor torque and levitation force, the motor rotor can be stably levitated and operated. Background technique [0002] In order to realize the precise control of the bearingless permanent magnet synchronous motor, the torque and the levitation force must be decoupled first. The vector control strategy can realize the precise decoupling of torque and suspension force, but it also brings a lot of complex vector transformation calculations to the control system, which is not conducive to ...

AI Technical Summary

Problems solved by technology

Therefore, in the traditional direct torque and direct levitation force control strategy, due to the delay of sampling and calculation, the target voltage vector can only act on the system in the next sampling period, so that the flux linkage, torque and levitation force The response always lags behind by one cycle, resulting in larger fluctuations in flux linkage, torque and levitation force

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