公开(公告)号：US20200186062A1

公开(公告)日：2020-06-11

申请号：US16704144

申请日：2019-12-05

Applicant: MAGNA CLOSURES INC.

Inventor： Luca FANCELLU ,  Antonio FRELLO ,  Jacopo FANUCCHI

IPC: H02P7/00 ,  H02P6/18 ,  G01P3/48 ,  H02P7/28 ,  H02P7/03 ,  H03K5/1532

Abstract: A control system for controlling a mechanically commutated direct current electric motor and corresponding method of operation are provided. The control system includes a motor current sensing circuit for sensing a motor current comprising a plurality of ripples due to commutation of the motor and outputting a motor current signal. The control system also includes a controller including a finite state machine unit and is configured to detect the plurality of ripples in the motor current and to determine whether each of the plurality of ripples is a valid ripple using the finite state machine unit. The controller is also configured to count the plurality of ripples determined to be valid using the finite state machine unit and to determine at least one of a motor rotational position and a motor speed of the motor based on a quantity of the plurality of ripples determined to be valid.