- 专利标题: Motor control current zero crossing detector
-
申请号: US15016351申请日: 2016-02-05
-
公开(公告)号: US09780706B2公开(公告)日: 2017-10-03
- 发明人: Gianluca Allegrini , Thomas Ross , James McIntosh , Robert Douglas Christie
- 申请人: Allegro Microsystems, LLC
- 申请人地址: US MA Worcester
- 专利权人: Allegro MicroSystems, LLC
- 当前专利权人: Allegro MicroSystems, LLC
- 当前专利权人地址: US MA Worcester
- 代理机构: Daly, Crowley, Mofford & Durkee, LLP
- 主分类号: G01R31/02
- IPC分类号: G01R31/02 ; H02H3/04 ; H02H7/08 ; H02K11/00 ; H02P6/18 ; H02P6/08
摘要:
A driver circuit is provided for driving a load, such as a multi-phase motor. The driver circuit includes a gate driver for providing a control signal to switching elements coupled to the driver circuit. A first switching element is coupled between a high supply voltage and a switching node of the load, and a second switching element is coupled between the switching node and a low supply voltage. To detect zero crossings of a current through the load, a zero crossing detector includes a first counter coupled to the switching node and a second counter coupled to the control signal. The first counter and second counter count in a predetermined direction based on a detected voltage of the switching node and based on a detected voltage of the control signal, respectively. The zero crossing detector generates an output signal based upon the difference between the first and the second counter.
公开/授权文献
- US20170229986A1 MOTOR CONTROL CURRENT ZERO CROSSING DETECTOR 公开/授权日:2017-08-10
信息查询