首页> 外国专利> DETERMINING COMMUTATION POSITION FOR A SENSORLESS PERMANENT MAGNET BRUSHLESS MOTOR AT LOW OR ZERO SPEED USING AN ASYMMETRIC DRIVE PATTERN

DETERMINING COMMUTATION POSITION FOR A SENSORLESS PERMANENT MAGNET BRUSHLESS MOTOR AT LOW OR ZERO SPEED USING AN ASYMMETRIC DRIVE PATTERN

机译：使用非对称驱动模式确定低速或零速无传感器永磁无刷电动机的换向位置

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摘要

A system is disclosed for controlling motor switching in a sensorless BLDC motor having a set of three stator windings. A controller unit includes a control signal generator, a memory device, a processing unit, a signal acquisition device, and an analog-to-digital converter. A power stage having a plurality of switches receives a control signal from the control signal generator and a power signal from a power source. The power stage drives two windings of the set of three stator windings with an asymmetric pulse width modulation signal and leaves one stator of the three stator windings undriven. The processing unit acquires a demodulated measured voltage on the undriven winding. The processing unit also communicates with the power stage to change which two windings of the three stator windings are driven when the demodulated measured voltage surpasses a threshold.

机译：公开了一种用于控制具有一组三个定子绕组的无传感器BLDC电动机中的电动机切换的系统。控制器单元包括控制信号发生器，存储装置，处理单元，信号获取装置和模数转换器。具有多个开关的功率级接收来自控制信号发生器的控制信号和来自电源的功率信号。功率级以不对称的脉冲宽度调制信号驱动三个定子绕组中的两个绕组，并使三个定子绕组中的一个不驱动。处理单元获取未驱动绕组上的解调测量电压。处理单元还与功率级通信，以在解调的测量电压超过阈值时更改驱动三个定子绕组中的两个绕组。

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公开/公告号US2013342141A1

专利类型
公开/公告日2013-12-26

原文格式PDF
申请/专利权人 CIRRUS LOGIC INC.;
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申请/专利号US201313826898
发明设计人 JOHN L. MELANSON;STEPHEN JAMES SANCHEZ;MIROSLAV OLJACA;JASON WILLIAM LAWRENCE;MARC JOHN KOBAYASHI;
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申请日2013-03-14
分类号H02P6/18;
国家 US
入库时间 2022-08-21 16:04:42

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