Stator partition type dual salient pole permanent magnetic brushless motor

Abstract

The invention discloses a stator partition type dual salient pole permanent magnetic brushless motor in the technical field of motor manufacturing. The stator partition type dual salient pole permanent magnetic brushless motor is successively provided with an external stator, a middle rotor and an internal stator which are coaxial from the inside to the outside. The external stator is composed of an annular stator core and multiple permanent magnets, the multiple permanent magnets are embedded in the stator core along a circumferential direction at intervals, and every two permanent magnets form an antipole; the middle rotor is composed of a rotor core and a non-magnetic conductive connection structure, the connection structure is uniformly embedded in the rotor core along a circumferential direction, the connection structure segments the rotor core into multiple rotor core blocks, the internal stator is of a salient pole structure, and salient pole teeth are wound with armature windings; the windings and the permanent magnets are separately arranged, the permanent magnets are placed on the external stator, heat generated by the permanent magnets can be dissipated through a casing, the permanent magnets are easily cooled, and the permanent magnets can be effectively prevented from irreversible demagnetization; and the rotor employs a segmented structure so that iron core loss of the motor rotor can be effectively reduced, and the motor efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a double salient pole permanent magnet brushless motor. Background technique [0002] Double salient permanent magnet motor is a combination of switched reluctance motor and permanent magnet motor. It has many similarities with switched reluctance motor in terms of electromagnetic characteristics and control strategies, such as simple rotor structure, suitable for high-speed operation, and simple control circuit. Wait. At the same time, the doubly salient permanent magnet motor also has the characteristics of high power density and high efficiency of the traditional permanent magnet motor. Double salient pole permanent magnet motor is a motor with different pole slot ratios and different forms. A permanent magnet is installed on the stator and the armature winding is wound, but the permanent magnet on the stator and the armature winding are basically in t...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of difficulty in heat dissipation of the permanent magnet and easy occurrence of irreversible demagnetization caused by the close proximity of the permanent magnet and the winding in the existing doubly salient pole permanent magnet brushless motor, and provides a doubly salient pole of the stator partition type The permanent magnet brushless motor places the permanent magnet and the winding separately to form a partitioned structure of the stator, which avoids the irreversible demagnetization of the permanent magnet due to the difficulty of heat dissipation. At the same time, the heat of the winding will not affect the permanent magnet, so as to increase the current line load. Improve motor power density

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