A double salient pole hybrid excitation motor with long permeable teeth

Abstract

The invention discloses a doubly-salient hybrid excitation motor with long magnetic conductive teeth, which comprises a stator and a rotor of a salient pole structure, wherein the stator includes a stator core, permanent magnets, armature windings and excitation windings, the rotor is composed of a rotor core, the stator core is combined by a plurality of stator core blocks, each stator core blockincludes a stator yoke, magnetic conductive teeth arranged at two ends of the stator yoke and at least one armature tooth arranged between the two magnetic conductive teeth, the armature winding is wound on the armature tooth; and the permanent magnet is embedded between the magnetic conductive teeth of two adjacent stator core blocks, and the radial length of the permanent magnet is less than the sum of the radial lengths of the magnetic conductive tooth and the stator yoke. The setting of the long magnetic conductive teeth reduces the influence imposed on the size of the armature windings by the size of the permanent magnets and the size of the excitation windings, and effectively increases the area of stator slots in which the armature windings and the excitation windings are place. Meanwhile, the torque and magnetic regulation performance are both taken into consideration, and the circumstance of local overheating of the motor does not occur.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a double salient pole hybrid excitation motor with long magnetically conductive teeth. Background technique [0002] In the existing doubly salient pole permanent magnet motor, the stator and the rotor are salient pole structures, and the stator yoke is embedded with permanent magnets. When current is passed into the stator armature winding, it will interact with the permanent magnetic field to generate electromagnetic torque, which will drive the salient pole rotor to rotate. Compared with the traditional rotor-type permanent magnet motor, the doubly salient permanent magnet motor not only has the characteristics of high mechanical strength of the rotor, simple structure, and low risk of permanent magnet demagnetization, but also has the advantages of high power density and flexible control of the permanent magnet motor. received widespread attention. [0003] However, the perm...

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Problems solved by technology

[0006] The invention provides a double salient pole hybrid excitation motor with long magnetic teeth, which can better solve the problem of reducing the effective stator slot area caused by adding an excitation winding, and not only inherits the torque density of the double salient permanent magnet motor At the same time, it effectively solves the problems that the doubly salient permanent magnet motor is difficult to realize the field weakening control and the constant power speed regulation range is small.

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