Power steering apparatus with pump driven by pulse width modulated controlled, brushless d.c. electric motor
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United States of America Patent
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-
Nov 3, 1998
Grant Date -
N/A
app pub date -
Jun 24, 1996
filing date -
Jul 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric motor for driving an oil pressure pump which feeds pressurized oil to a power cylinder comprises a brushless d.c. motor. An onboard main battery comprises a main battery which is onboard an electrically driven vehicle and which is constructed as a high tension d.c. voltage source delivering a high voltage on the order of 96 to 600V. The battery is directly connected to the motor, and a controller is connected therebetween to provide a pulse width modulated variable voltage signal to the motor from the battery.
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