Modular cage rotor stator self-excited synchronous motor and its control method

Abstract

The invention relates to a synchronous motor, which is characterized in that a set of 2 p pole three-phase armature windings and a set of 2 q Pole single-phase excitation winding, which supplies power to the excitation winding to realize self-excitation of the stator. The rotor is composed of cage rotor modules along the circumferential direction to form a rotor with salient poles. Each cage rotor module is made of positioning slots and non-magnetic materials. The sleeves are connected; the cage rotor module has multiple radial trapezoidal slots, and each trapezoidal slot has several different stepped slot widths in the radial direction. Short-circuit cage bars are placed in the trapezoidal slots, and the edge of the adjacent cage rotor module It is a stepped notch, and after splicing, a common trapezoidal groove is formed. The depth of the gap at the bottom of the groove reaches the outer surface of the sleeve, and a common cage is placed in the groove; The coupling capability of the sleeve windings is maximized, resulting in a new modular cage-rotor-stator self-excited synchronous motor structure with high power density and excellent steady-state and dynamic performance.

Description

technical field [0001] The invention relates to a synchronous motor, in particular to a modular cage barrier rotor stator self-excited synchronous motor and a control method thereof. The motor can be operated as a motor or as a generator. Background technique [0002] The stator of the modular cage-rotor-stator self-excited synchronous motor consists of 2 p pole three-phase symmetrical armature winding and 2 q Pole single-phase symmetrical field winding (or 2 q pole three-phase symmetrical armature winding and 2 p Pole single-phase symmetrical field winding), and satisfy 2 p -2 q ≥4, the coupling between the two sets of windings is by p r = p + q It is realized by a specially designed rotor for the poles, so this kind 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 the conve...

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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 AC motors with double sets of windings placed on the stator is greatly affected by uncertain parameter changes and disturbances, and has disadvantages such as poor anti-interference ability

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