Stator double-winding AC motor with double-cage barrier rotor and its control method

Abstract

The invention relates to a stator double-winding alternating-current motor with double cage barrier rotors. The stator double-winding alternating-current motor is characterized in that an inner rotor and an outer rotor of the motor are positioned on inner and outer sides of a stator respectively; three-phase symmetry power windings and three-phase symmetry control windings are arranged on the inner and outer sides of the stator; the inner rotor and the outer rotor are spliced along the peripheral direction by using the same cage barrier rotor modules to form a rotor with a salient pole; each cage barrier rotor module is connected with a sleeve by positioning grooves and is provided with a plurality of radial trapezoid grooves; short-circuit cage bars are put into the grooves; a stepped breach is formed in the joint of the adjacent cage barrier rotor modules; and after the adjacent modules are spliced, a public trapezoid groove is formed in the joint of the adjacent modules, a gap at the bottom of the groove reaches the surface of the sleeve, and public cage bars are put into the grooves. The invention aims to provide the stator double-winding alternating-current motor which is convenient to manufacture, can maximize the coupling capacity of the power windings and the control windings on two sides of the stator, is high in power density and dynamic property and is provided with the double cage barrier rotors.

Description

Technical field: [0001] The invention relates to an AC motor, in particular to a stator double-winding AC motor with a double-cage barrier rotor and a control method thereof. The motor can be operated as a motor or as a generator. Background technique: [0002] The stator of the dual-winding AC motor with double-cage rotor includes three-phase symmetrical power windings with 2p poles and three-phase symmetrical control windings with 2q poles (or three-phase symmetrical power windings with 2q poles and three-phase symmetrical control windings with 2p poles) winding), and satisfy 2p-2q≥4, the coupling between the two sets of windings is by p r =p+q is achieved by a specially designed rotor for poles, so the rotor structure of this type of motor will have an important impact on the steady-state performance, dynamic characteristics and power density of the motor. The rotor structures that can be used for this type of motor mainly include two types: wound type and reluctance ty...

AI Technical Summary

Problems solved by technology

The radial laminated salient pole reluctance rotor with cogging is easy to process, but the coupling effect on the two sets of stator windings is not good; the axial laminated reluctance rotor has strong coupling ability, but the manufacturing process is complicated. Difficult to use in AC motors

In addition, the control system of conventional stator double-winding AC motors is greatly affected by uncertain parameter changes and disturbances, and has disadvantages such as poor anti-interference ability

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