Stator self-excitation synchronous motor with double cage barrier rotors and control method thereof

Abstract

The invention relates to a stator self-excitation synchronous motor with double cage barrier rotors and a control method thereof. The stator self-excitation synchronous motor is characterized in that an inner rotor and an outer rotor are positioned on inner and outer sides of a stator respectively; three-phase symmetry power windings and three-phase symmetry control windings are arranged in grooves on inner and outer surfaces of a stator; the rotors are spliced on the side which is close to the stator 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 trapezoid grooves; short-circuit cage bars are put into the trapezoid 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, the depth of 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 self-excitation synchronous motor which is convenient to manufacture, can realize the brushless self-excitation of the stator, is high in power density and steady and dynamic properties 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 self-excited synchronous 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 a self-excited synchronous motor with a double-cage rotor includes a three-phase symmetrical armature winding with 2p poles and a single-phase symmetrical field winding with 2q poles (or a three-phase symmetrical armature winding with 2q poles and a single-phase Symmetrical excitation 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 this type of motor does not need to install brush slip rings, and can realize electromechanical energy conversion through the interaction between the magnetic field of the excitation winding and the magnetic field of the armature winding, compared with conventional synch...

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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