Invention Grant
- Patent Title: Motor control device and electric power steering system using said motor drive circuit
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Application No.: US15317289Application Date: 2015-05-11
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Publication No.: US10374531B2Publication Date: 2019-08-06
- Inventor: Nobuyasu Kanekawa , Ryoichi Kobayashi , Tomonobu Koseki , Takuro Kanazawa
- Applicant: Hitachi Automotive Systems, Ltd.
- Applicant Address: JP Hitachinaka-shi
- Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee: Hitachi Automotive Systems, Ltd.
- Current Assignee Address: JP Hitachinaka-shi
- Agency: Crowell & Moring LLP
- Priority: JP2014-133499 20140630
- International Application: PCT/JP2015/063410 WO 20150511
- International Announcement: WO2016/002340 WO 20160107
- Main IPC: H02P27/08
- IPC: H02P27/08 ; H02P6/10 ; H02P21/00 ; H02P29/60 ; B62D5/04 ; H02P25/22 ; H02P21/22

Abstract:
The purpose of the present invention is not only to reduce ripple current but also to improve operation efficiency by reducing heat generation. When n is defined as an integer of 2 or more, a motor control device of the present invention drives n sets of windings by n sets of inverters. The motor control device is characterized in that when said n sets of inverters output high power, at least one or more of said n sets of inverters are set to have an output duty cycle of 100%.
Public/Granted literature
- US20170117830A1 Motor Control Device and Electric Power Steering System Using Said Motor Drive Circuit Public/Granted day:2017-04-27
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