Integrated brushless motor brake device, brushless motor and brake control method thereof

By integrating the brake pads and armature into the motor, the brake is released using the electromagnetic attraction of the stator coil. This solves the problems of large size and complex control of existing brushless motor brake structures, and achieves miniaturization and efficient braking of the motor.

CN122316004APending Publication Date: 2026-06-30CHONGQING CHANGAN AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING CHANGAN AUTOMOBILE CO LTD
Filing Date
2026-04-29
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing brushless motor brake structure is large in size and requires a separate excitation structure, which increases the overall size of the motor and the complexity of control.

Method used

An integrated brushless motor brake device is adopted, which integrates the outer arc-shaped brake pad, the inner arc-shaped armature, the connecting base plate and the elastic connector inside the motor. The braking is released by the electromagnetic attraction generated by the energization of the stator coil, eliminating the need for external electromagnetic coils and excitation components.

Benefits of technology

It significantly reduces the axial and radial dimensions of the motor, lowers system cost and control complexity, features a power-off self-locking function, is suitable for space-constrained applications, extends service life and reduces energy consumption.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to an integrated brushless motor brake device, a brushless motor, and a brake control method thereof, including at least one elastic brake assembly. The elastic brake assembly includes an outer arc-shaped brake pad disposed on the outer side of the outer ring of the brushless motor rotor; an inner arc-shaped armature disposed on the inner side of the stator tooth tip circle of the brushless motor; a connecting base plate, one end of which is connected to the outer arc-shaped brake pad and the other end of which is connected to the inner arc-shaped armature. The connecting base plate is axially aligned with the teeth of the brushless motor stator and has a base plate receiving groove extending along the length of the connecting base plate; an elastic connector is horizontally disposed in the base plate receiving groove, one end of which is connected to the housing of the brushless motor and the other end of which is connected to the end face of the base plate receiving groove. When the stator coil of the brushless motor is de-energized, the outer arc-shaped brake pad abuts against the outer ring of the motor rotor under the elastic preload of the elastic connector for braking. This solves the problems of the large overall volume and the need for a separate excitation structure in existing motor brake structures.
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