公开(公告)号：US20130342141A1

公开(公告)日：2013-12-26

申请号：US13826898

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Jason William Lawrence ,  Marc John Kobayashi ,  Stephen James Sanchez ,  John L. Melanson ,  Miroslav Oljaca

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: 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.

Abstract translation: 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电动机中的电动机开关的系统。 控制器单元包括控制信号发生器，存储器件，处理单元，信号采集器件和模数转换器。 具有多个开关的功率级从控制信号发生器接收控制信号和来自电源的功率信号。 功率级通过不对称的脉宽调制信号驱动三组定子绕组的两个绕组，并使三个定子绕组中的一个定子不分流。 处理单元获取未驱动绕组上的解调测量电压。 当解调的测量电压超过阈值时，处理单元还与功率级进行通信，以改变三个定子绕组的两个绕组的驱动。

公开(公告)号：US20130342145A1

公开(公告)日：2013-12-26

申请号：US13835101

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Marc John Kobayashi ,  Jason William Lawrence ,  Stephen James Sanchez ,  John L. Melanson ,  Miroslav Oljaca

IPC: H02P6/18

CPC classification number: H02P6/183 ,  H02P6/185

Abstract: The system and method disclose for the controlling of sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A motor controller controls a power stage that drives two windings of a set of three windings in the motor with pulse width modulated signal. A plurality of voltage values on an undriven winding of the set of three windings are sampled within a window of time, wherein a period beginning when the driven windings are energized and ending when the driven windings are de-energized encompasses the window of time. The sampled voltage values are processed. When the processed voltage values exceed a threshold, the motor controller changes which two windings are driven.

Abstract translation: 该系统和方法公开了用于控制驱动多相无传感器无刷永磁直流电动机的一组定子绕组中的顺序相位切换。 电机控制器控制功率级，通过脉宽调制信号驱动马达中一组三个绕组的两个绕组。 在三个绕组组中的未驱动绕组上的多个电压值在时间窗口内被采样，其中从被驱动绕组通电并且当被驱动绕组断电时结束的周期包括时间窗口。 对采样的电压值进行处理。 当处理的电压值超过阈值时，电机控制器改变驱动两个绕组。