公开(公告)号：US20180248502A1

公开(公告)日：2018-08-30

申请号：US15753920

申请日：2016-08-17

Applicant: AERISTECH CONTROL TECHNOLOGIES LIMITED

Inventor： Bryn Geoffrey Roddick RICHARDS ,  Michal KALBARCZYK

IPC: H02P6/16 ,  H02P6/28 ,  H02P6/06 ,  H02K21/12 ,  H02P25/03 ,  H02P6/15

CPC classification number: H02P6/16 ,  H02K21/12 ,  H02P6/06 ,  H02P6/157 ,  H02P6/28 ,  H02P25/03

Abstract: A permanent magnet motor (2), and also a permanent magnet generator (102) comprising a plurality of phase windings, a control system (16) and a commutation circuit (6) is described. The commutation circuit (6) is operative for controlling a timing of a current supplied to the phase windings in dependence upon an angular position of the permanent magnet motor (2). The control system (16) is operative to supply a current to an individual of the phase windings in a current pulse event occurring within a commutation event. The duration of the current pulse event is less than the duration of the commutation event and the proportion of the commutation event for which the current is supplied to the individual of the phase windings is determined so as to control the speed of the motor (2).