Speed regulation permanent magnet synchronous motor based on variable number of turns of windings

Abstract

The invention discloses a speed regulation permanent magnet synchronous motor based on variable number of turns of windings. The speed regulation permanent magnet synchronous motor comprises three-phase windings, each winding comprises a plurality of serially connected series winding units, each series winding unit comprises one winding and two winding control structures, one winding control structure and the winding after parallel connection are parallelly connected with the other winding control structure, the winding control structures are used for controlling whether current is led in ornot when the speed regulation permanent magnet synchronous motor works, the connection number of turns of the series winding units is changed to control the counter potential of the speed regulation permanent magnet synchronous motor, weak magnetic current is reduced, and performances are improved. According to the speed regulation permanent magnet synchronous motor, the winding control structuresserially connected with the windings are disconnected, the winding control structures parallelly connected with the windings are closed, the windings are bypassed in a circuit-breaking manner, the number of turns of the windings connected into the speed regulation permanent magnet synchronous motor during work is decreased, the counter potential is reduced, the number of rated points is increased, and a speed regulation range is widened.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, and more specifically relates to a speed-regulating permanent magnet synchronous motor based on variable winding turns. Background technique [0002] my country is rich in rare earth resources. The reserves of rare earth ores are about four times that of other countries in the world. The output of rare earth ores and rare earth permanent magnets ranks among the top in the world. At the same time, my country's research on rare earth materials and rare earth permanent magnet motors has reached the international advanced level. Therefore, giving full play to the advantages of rare earth resources, vigorously researching and promoting the application of various permanent magnet motors represented by rare earth permanent magnet motors has important theoretical significance and practical value for our country. Compared with traditional motors, permanent magnet motors are si...

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a speed-regulating permanent magnet synchronous motor based on variable winding turns, and its purpose is to solve the problem of obvious magnetic field weakening when the existing speed-regulating permanent magnet synchronous motor runs at high speed. Effects leading to technical problems with degraded motor performance

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