Permanent magnet synchronous motor for elevator, control method and device of permanent magnet synchronous motor and storage medium

By using a control method that generates braking torque by utilizing the short-circuit current of the six-phase windings in the case of a drive unit failure in a permanent magnet synchronous motor for elevators, the problem of motor braking torque limitation has been solved, achieving high power density and miniaturization of the motor to reduce costs.

CN122371815APending Publication Date: 2026-07-10GUANGDONG WINONE ELEVATOR +1
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Patent Information

Application Number
CN202610559617.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the existing technology, as motor technology develops and power density increases, the requirement for braking torque limits the possibility of further miniaturization and cost reduction of motors.

Method used

A control method for a permanent magnet synchronous motor for elevators is adopted. When the drive unit fails, the main switch is opened and the first short-circuit switch and the second short-circuit switch are closed, so that the first three-phase winding and the second three-phase winding form an independent closed circuit. The braking torque is generated through the short-circuit current of the six-phase winding to realize the short-circuit braking of the motor.

Benefits of technology

The short-circuit braking torque of the motor was increased, the power density was further improved, the size was reduced, and the cost was lowered.

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Abstract

The invention discloses a permanent magnet synchronous motor for an elevator, a control method and device of the permanent magnet synchronous motor and a storage medium, and the permanent magnet synchronous motor for the elevator comprises a driving unit, a main switch, a first three-phase winding, a first short-circuit switch arranged corresponding to the first three-phase winding, a second three-phase winding and a second short-circuit switch arranged corresponding to the second three-phase winding, the method comprises the steps that when the permanent magnet synchronous motor for the elevator runs, the main switch is controlled to be switched on, the first short circuit switch and the second short circuit switch are controlled to be switched off, a three-phase or double-three-phase or six-phase permanent magnet synchronous motor driven by the driving unit in a variable frequency mode is formed, and motor driving is achieved; when the driving unit breaks down, the main switch is controlled to be switched off, and the first short-circuit switch and the second short-circuit switch are controlled to be switched on, so that the first three-phase winding and the second three-phase winding form independent closed loops respectively, braking torque is generated through short-circuit current of the six-phase winding, and motor short-circuit braking is achieved. Therefore, the short-circuit braking torque of the motor is improved.
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