Asynchronous-starting permanent-magnet synchronous motor with inner rotor and outer rotor

Abstract

The invention relates to an asynchronous-starting permanent-magnet synchronous motor with an inner rotor and an outer rotor, and belongs to the technical field of motor equipment. The asynchronous-starting permanent-magnet synchronous motor comprises the outer rotor, the inner rotor, a common stator, a connection pin, a heat dissipation water pipe and end support steel, wherein groove-embedded windings are arranged at the common stator part, an outer side of the stator and an inner stator of the stator of the asynchronous-starting permanent-magnet synchronous motor with the inner rotor and the outer rotor, a pin penetrating hole, a heat dissipation water pipe water inlet hole and a heat dissipation water pipe outlet hole are formed in the middle part, the connection pin sequentially penetrates through the end support steel, the common stator and the other end support steel to form a whole, a tail end of the connection pin and the two blocks of end support steel are integratedly welded, an inner mouth and an outer mouth are milled by taking the inner diameter of the public stator as a reference, the concentricity is ensured, and an inner ring bearing and an outer ring bearing are arranged to support the inner rotor and the outer rotor. The asynchronous-starting permanent-magnet synchronous motor has the advantages that the common advantages of a permanent-magnet motor with the inner rotor and the outer rotor and an induction motor are integrated, the power factor and the efficiency are relatively high under the conditions of low load rate and full load, the step of a frequency inverter is omitted, and the cost is greatly reduced.

Description

technical field [0001] This patent belongs to the technical field of motor equipment, in particular to an asynchronous start permanent magnet synchronous motor with inner and outer double rotors. Background technique [0002] Internal and external dual-rotor motors are widely used in fields such as hybrid electric vehicles and ship propulsion systems. It has the advantages of high power density, high degree of integration, and small volume. At present, dual-rotor motors mainly include dual-rotor permanent magnet motors and dual-rotor induction motors. The internal and external dual-rotor permanent magnet motor needs a frequency converter to drive, and the price of a high-power frequency converter is often relatively expensive, and the overall system is relatively low in cost performance. For the inner and outer dual-rotor induction motor, the efficiency is low when the load rate is low, and the power factor is relatively low, so the purpose of energy saving cannot be achie...

AI Technical Summary

Problems solved by technology

The internal and external dual-rotor permanent magnet motor needs a frequency converter to drive. For high-power frequency converters, the price is often relatively expensive, and the overall system is relatively low in cost performance.

For the inner and outer dual-rotor induction motor, the efficiency is low when the load rate is low, and the power factor is relatively low, which cannot achieve the purpose of energy saving

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