Invention Grant
- Patent Title: Controller for brushless DC motor with flexible startup and method therefor
- Patent Title (中): 无刷直流电机控制器灵活启动及其方法
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Application No.: US14146081Application Date: 2014-01-02
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Publication No.: US09178451B2Publication Date: 2015-11-03
- Inventor: Kok Hong Soh
- Applicant: Silicon Laboratories Inc.
- Applicant Address: US TX Austin
- Assignee: SILICON LABORATORIES INC.
- Current Assignee: SILICON LABORATORIES INC.
- Current Assignee Address: US TX Austin
- Agency: Polansky & Associates, P.L.L.C.
- Agent Paul J. Polansky
- Main IPC: H03K5/00
- IPC: H03K5/00 ; H02P6/08 ; H02P6/20

Abstract:
A controller for a brushless direct current (BLDC) motor includes a pulse width modulator and a control circuit. The pulse width modulator provides a plurality of phase control signals to control corresponding ones of a plurality of phases of the BLDC motor. The control circuit controls the pulse width modulator to provide pulses to the plurality of phases to control a speed of the BLDC motor by causing the pulse width modulator to adjust widths of the pulses when a measured current in an active one of a corresponding phase exceeds a threshold in a startup mode. In one form, the controller is part of a BLDC motor system which also includes a plurality of phase drivers each having inputs for receiving respective ones of said plurality of phase control signals, and outputs adapted to couple to corresponding phases of the BLDC motor.
Public/Granted literature
- US20150188462A1 CONTROLLER FOR BRUSHLESS DC MOTOR WITH FLEXIBLE STARTUP AND METHOD THEREFOR Public/Granted day:2015-07-02
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