Wide-speed variable-speed motor with self-decoupling of AC-direction axis directly controlled by excitation

Abstract

The invention discloses a wide-speed variable-speed motor with excitation direct-control alternating current-direct current shaft self decoupling. The variable-speed motor is composed of a stator, a rotor, and a permanent magnet. The stator consists of a stator iron core and armature windings; the stator iron core is designed to have an opening groove structure; and the armature windings are arranged in the opening grooves of the stator iron core. The armature windings provide power through an inverter and generate alternating currents with direct-current biases; the armature windings are arranged in a distributed centralized winding manner and each winding winds around stator teeth. The rotor includes a rotor iron core. According to the motor disclosed by the invention, the winding structure is simplified; the direct-current winding and the alternating-current winding of the existing hybrid excitation motor are combined into one set of windings, so that the winding difficulty can be reduced, the space, occupied by the windings, inside the stator can be saved. And reliability and control flexibility of the motor can be improved. Moreover, speed regulation of a motor in a wide rotating speed range can be realized.

Description

Technical field [0001] The invention relates to the field of brushless synchronous motors, in particular to a wide-rotation speed-regulating motor whose excitation directly controls the self-decoupling of AC-DC shafts. Background technique [0002] With the development of new energy technology, motors have been widely used as a clean energy drive device, especially in the fields of electric vehicle drive and new energy power generation. Compared with traditional electric excitation motors, permanent magnet synchronous motors have higher power density and efficiency, and are more suitable for high torque direct drive applications. In addition, due to the abundance of rare earth materials in my country, it also provides natural resource advantages for the development of permanent magnet synchronous motors. [0003] The excitation magnetic field of the traditional permanent magnet synchronous motor is mainly generated by permanent magnets, and its adjustability is not strong, and whe...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wide-speed speed-adjustable motor with excitation direct control AC-D axis self-decoupling, so as to improve the shortcomings of existing permanent magnet motors, which are difficult to control field weakening and complex winding structure of hybrid excitation motors

Images