Square wave motor vector control algorithm

Abstract

The invention discloses a square wave motor vector control algorithm which comprises a motor with square wave output current, a motor detection stator side current wave part, a coordinate transformation algorithm part, a motor rotation speed control algorithm part, an excitation current control algorithm part, a torque current control algorithm part and a PWM algorithm part, and an algorithm part for converting output wave current into sine wave current is arranged between the motor detection stator side current wave part and the coordinate transformation algorithm part. The method has the beneficial effects that the dynamic and steady-state performance of a square-wave motor system can be improved, the square-wave motor vector control algorithm can improve the control capability of the square-wave motor in accurate control and magnetic increasing and weakening directions, and particularly, the effects such as vector control are applied to the permanent magnet brushless motor; according to the permanent magnet brushless direct current motor magnetism increasing vector control algorithm, the magnetic field can be compensated after the permanent magnet of the permanent magnet brushless motor has the excitation loss phenomenon, the magnetic field of the permanent magnet brushless motor is kept constant, and the adverse effect of the excitation loss phenomenon is weakened.

Description

technical field [0001] The invention relates to a motor vector control algorithm, in particular to a square wave motor vector control algorithm. Background technique [0002] Compared with the traditional DC motor, the brushless DC motor replaces the traditional mechanical commutator with an electronic commutator, and is a motor that develops rapidly with power electronic devices. Brushless DC motors do not require regular maintenance because they have no brushes, and have high reliability. Compared with other types of motors, brushless DC motors have a higher power density under the same volume. At present, brushless DC motors have been widely used in many fields such as robots, electric vehicles, and medical equipment. [0003] At present, the control of synchronous motors has been relatively mature, and the corresponding motor parameter measurement of synchronous motors has also been perfected day by day. But compared with the brushless DC motor, because the counter ele...

AI Technical Summary

Problems solved by technology

However, since the magnetic field generated by the permanent magnet is constant, it cannot meet the working conditions that require weak magnetic field to increase speed. Sometimes after a certain number of years of use, the phenomenon of "loss of field" will occur. At this time, the performance of the motor will decline, including the load capacity.

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