Single-phase permanent magnet reluctance brushless motor

Through the innovative design of the single-phase permanent magnet reluctance brushless motor, combined with an open magnetic circuit and a multi-pole composite magnetic pole structure, the problems of static lack of self-locking and insufficient starting torque of traditional motors are solved. This achieves wide voltage adaptation, simplified control and efficient energy recovery, and improves the starting, low-speed and high-speed performance of the motor.

CN122137149APending Publication Date: 2026-06-02BEIJING XIANBO TONGTIAN INSTITUTE OF NATURAL SCIENCES (LLP)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING XIANBO TONGTIAN INSTITUTE OF NATURAL SCIENCES (LLP)
Filing Date
2026-03-06
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional motors suffer from problems such as lack of static self-locking, insufficient starting torque, weak low-speed torque, limited voltage and power adaptability, complex control logic, high winding impedance, and poor heat dissipation performance, making them unable to meet the requirements of high-load operating conditions.

Method used

It adopts a single-phase permanent magnet reluctance brushless motor design. Through the integrated innovation of stator assembly, rotor assembly and winding assembly, it combines the advantages of permanent magnet motor and reluctance motor. It adopts an open magnetic circuit structure, parallel winding of dual excitation coils, multi-pole composite magnetic pole structure and simple drive control to achieve natural reluctance self-locking and energy recovery after reluctance braking.

Benefits of technology

It achieves static self-locking without electricity, large starting torque, large torque at low speed, stable torque output at high speed, wide voltage adaptability, simplified control system, reduced energy consumption and heat generation, and improves the safety, reliability and efficiency of the motor, adapting to a wide range of load conditions.

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Abstract

This invention discloses a single-phase permanent magnet reluctance brushless motor, belonging to the field of motor technology. The motor uses DC power supply, solving problems such as lack of static self-locking, complex electrical control, and outdated braking modes in traditional series-wound, brushless, and permanent magnet synchronous motors. The motor consists of a stator assembly, winding assembly, rotor assembly, and drive control assembly. The stator assembly adopts a radially expandable open magnetic circuit structure. The winding assembly is a single-phase system with two excitation coils connected in parallel, allowing flexible adjustment of the number of turns and wire diameter, reducing copper losses, and improving efficiency and heat dissipation. The rotor assembly is a three-N-pole and three-S-pole magnetic tiles coaxially and in the same direction to form a composite magnetic pole structure. The salient poles of the magnetic poles cooperate with the salient poles of the stator pole shoes to form a magnetic circuit synthesis, enabling the permanent magnet torque and reluctance torque to be superimposed in the same direction, achieving static locking. The motor has a large starting torque, good high and low speed torque performance, and a wide voltage adaptation range, achieving reluctance braking and synchronous power generation based on reluctance characteristics.
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