Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-02-07
2006-02-07
Tweel, Jr., John (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C701S001000
Reexamination Certificate
active
06995679
ABSTRACT:
A power steering device capable of obtaining a high rotary speed in the medium low torque range of an electric motor without incurring a drastic increase in manufacturing cost. The power steering device generates an auxiliary steering power by oil pressure that is generated by a pump which is driven by an electric power motor. The electric motor is a triple-phase brushless motor, with its angle of rotation being detected by the Hall sensors. The field coils are provided with the electric current from a drive circuit which is driven by a drive signal from the motor drive control part. The motor drive control part controls the electric motor by PWM control in the low medium speed rotation range and controls the electric motor by phase advance angle control, with PWM duty at 100 percent, in the medium high speed range.
REFERENCES:
patent: 5505275 (1996-04-01), Phillips
patent: 5659473 (1997-08-01), Noro et al.
patent: 5675699 (1997-10-01), Yamamoto et al.
patent: 5739650 (1998-04-01), Kimura et al.
patent: 5787376 (1998-07-01), Nishino et al.
patent: 5829547 (1998-11-01), Fujii et al.
patent: 6026926 (2000-02-01), Noro et al.
patent: 6032091 (2000-02-01), Noro et al.
patent: 6034493 (2000-03-01), Boyd et al.
patent: 6034494 (2000-03-01), Kitamine et al.
patent: 6092012 (2000-07-01), Shimizu
patent: 6129172 (2000-10-01), Yoshida et al.
patent: 6250418 (2001-06-01), Shimizu et al.
patent: 6266591 (2001-07-01), Wilson-Jones et al.
patent: 6332108 (2001-12-01), Hirasago
patent: 6390229 (2002-05-01), Kaji
patent: 6400108 (2002-06-01), Chen et al.
patent: 6427105 (2002-07-01), Matsushita
patent: 6564140 (2003-05-01), Ichikawa et al.
patent: 6580235 (2003-06-01), Laurent
patent: 6650073 (2003-11-01), Kawabata
patent: 6687590 (2004-02-01), Kifuku et al.
patent: 2002/0116105 (2002-08-01), Chen et al.
patent: 2003/0178245 (2003-09-01), Takagi
patent: 2004/0007998 (2004-01-01), Yasohara et al.
patent: 0 987 163 (2000-03-01), None
patent: 1 235 340 (2002-08-01), None
patent: 2 305 033 (1997-03-01), None
patent: 2000/134969 (2000-05-01), None
patent: WO 96/01521 (1996-01-01), None
Eskritt James B.
Jounokuchi Hideki
Kuehner Joel E.
Yamazaki Yoshiyuki
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Tweel , Jr. John
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