Invention Grant
- Patent Title: Electric power steering apparatus
- Patent Title (中): 电动助力转向装置
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Application No.: US12681972Application Date: 2008-11-04
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Publication No.: US08330399B2Publication Date: 2012-12-11
- Inventor: Shigeki Nagase
- Applicant: Shigeki Nagase
- Applicant Address: JP Osaka-shi
- Assignee: JTEKT Corporation
- Current Assignee: JTEKT Corporation
- Current Assignee Address: JP Osaka-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2007-297765 20071116
- International Application: PCT/JP2008/070041 WO 20081104
- International Announcement: WO2009/063772 WO 20090522
- Main IPC: H02P1/00
- IPC: H02P1/00

Abstract:
A voltage detector 17 for detecting a voltage VB of a battery 9 as a main power supply and a voltage detector 18 for detecting a voltage VC of an auxiliary power supply 14 are provided. On the basis of an upper limit value IB previously defined as the maximum value of current through the battery 9, a control circuit 6 defines an upper limit of the electric power supplied to the motor 4 as η·VB·IB (η representing the efficiency of the driving circuit 5) when a first output mode is selected in which the auxiliary power supply 14 is not used or defines the upper limit of the electric power supplied to the motor 4 as η·(VB+VC)·IB when a second output mode is selected in which the auxiliary power supply 14 is used as connected in series with the battery 9.
Public/Granted literature
- US20100207558A1 ELECTRIC POWER STEERING APPARATUS Public/Granted day:2010-08-19
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