公开(公告)号：US20180006587A1

公开(公告)日：2018-01-04

申请号：US15702096

申请日：2017-09-12

Applicant: Sevcon Limited

Inventor： Peter Barrass ,  David Hodgson ,  Howard Slater

IPC: H02P6/08 ,  H02P25/024 ,  H02P6/28 ,  H02P6/06 ,  H02P21/00 ,  H02P27/06

CPC classification number: H02P6/28 ,  H02P6/007 ,  H02P6/06 ,  H02P21/0089 ,  H02P25/024 ,  H02P27/06 ,  H02P2207/05

Abstract: An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.