A control method for a single-phase brushless motor

A single-phase brushless motor and control method technology, applied in the direction of single-phase motor control, etc., can solve the problems of high current peak value, current waveform distortion, poor performance of the whole machine, etc.
CN109842330BActive Publication Date: 2021-12-14NANJING CHERVON IND
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING CHERVON IND
Publication Date
2021-12-14

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Abstract

The invention discloses a control method of a single-phase brushless motor. The brushless motor using this control method is used in an electric tool, and the electric tool includes a position sensor, a drive circuit and a controller; the control method includes: when the position signal output by the position sensor changes, the controller After closing the currently output control signal and lagging the non-conduction angle T, the controller triggers to output a target control signal to the drive circuit, and the drive circuit drives the single-phase brushless motor according to the target control signal. The control method uses the change of the position signal output by the position sensor as an instruction, the controller turns off the current output control signal, and triggers the target control signal to the drive circuit after the non-conduction angle T to drive the single-phase brushless motor to reduce current spikes in single-phase brushless motors. The overall performance of the single-phase brushless motor is improved, and the size of the electric tool motor and the corresponding control board are reduced.
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Description

Technical field

[0001] Technical Field Example embodiments relate to controlling the motor according to the present invention, in particular, it relates to a method of controlling a single-phase brushless motor. Background technique

[0002] In recent years, with the new permanent magnet materials, microelectronic technology, automatic control technology and the development of power electronics technology, especially high-power switching devices, a brushless motor has been considerable development. Single-phase brushless motor due to the relative minimum number of relatively simple electrical system, a drive control circuit required for a small cost, been more widely used in electric tools, fans, vacuum cleaners, and other fields. However, because of its low operating efficiency with respect to the three-phase brushless DC motor, a single-phase brushless relatively small market applications DC motor.

[0003] After the motor, the conduction interval rotor back EMF reaches a maxim...

Claims

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