A two-phase square wave motor with electric field flux switching

Abstract

The invention belongs to the field of manufacture and application of motors and provides an electro-magnetic flux switching two-phase square-wave motor. The electro-magnetic flux switching two-phase square-wave motor comprises a secondary rotor and an armature surrounding the secondary rotor, wherein 8 convex armature teeth are arranged in the armature at equal intervals; in 8 armature grooves formed between the adjacent convex armature teeth, excitation windings for generating excitation fields are arranged in 4 alternate armature grooves, and A-phase drive windings and B-phase drive windings are arranged in the other 4 armature grooves and arranged oppositely. The motor windings also have square-wave counter electromotive force, and control with higher cost performance can be realized. The two-phase windings are adopted, so that better advantages of start and rapid steering are realized while the complexity of the windings is reduced, and the cost performance of the motor is improved. The motor has all the advantages of a flux switching motor, can perform short-time large-multiple overload running in short-time duty and is particularly applicable to load variation occasions.

Description

technical field [0001] The invention belongs to the field of motor manufacturing and its application, in particular to a two-phase square-wave motor with electric excitation magnetic flux switching. Background technique [0002] Flux switching (switching flux linkage) motor, the rotor is only composed of iron core, the structure is simple and reliable, easy to run at high speed, under the appropriate control algorithm, it can realize high-efficiency speed control, and the cost is low. The structure where the current winding and the permanent magnets are both on the stator side is easy to cool. With permanent magnets, the thrust density is high, and it is generally designed as a sine wave back electromotive force, which is suitable for servo control. [0003] Conventional flux switching motors such as figure 1 As shown, the permanent magnet is used as the excitation field. or using as figure 2 , image 3 The structure shown is mixed excitation by DC coil and permanent ma...

AI Technical Summary

Problems solved by technology

[0005] In addition, conventional flux switching motors (such as Figure 1-Figure 8 ) is generally designed as a sine wave back EMF winding. Although the sine wave brushless motor control has superior performance, the hardware costs such as position sensors and control chips are high, and the control algorithm is complicated. In many cases, the brushless control method using square wave back EMF has better high cost performance

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