Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2004-07-22
2010-02-09
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400230, C318S400300
Reexamination Certificate
active
07659678
ABSTRACT:
A system is disclosed for driving a DC motor (15) under conditions of a controlled average current. An inductive element may be arranged for connection in series with the DC motor. A switch (14) is preferably coupled to the inductive element for connecting and disconnecting a terminal of the inductive element from the voltage source. A diode may be arranged for connection in parallel with a combination of the inductive element and the DC motor arranged in series, with the appropriate polarity so that current circulating through the inductive element circulates through the diode when the switch disconnects the terminal from the voltage source. A capacitor is arranged for connection in parallel with the motor, for limiting a resulting voltage over the motor or for storing charge depending on the embodiment of the invention. A device for measuring a current through the motor is provided, and a device (13) for controlling operation of the switch dependent upon the measured current in the motor is also provided. An airflow apparatus is also disclosed.
REFERENCES:
patent: 3818306 (1974-06-01), Marini
patent: 3872364 (1975-03-01), Hubner
patent: 4005351 (1977-01-01), Blum
patent: 4472666 (1984-09-01), Akeda et al.
patent: 4473781 (1984-09-01), Nielsen
patent: 4527102 (1985-07-01), Gotou
patent: 4581692 (1986-04-01), Nayberg et al.
patent: 4649464 (1987-03-01), Shono
patent: 4673851 (1987-06-01), Disser
patent: 4673858 (1987-06-01), Saito
patent: 4733102 (1988-03-01), Nakayama et al.
patent: 4855652 (1989-08-01), Yamashita et al.
patent: 5291106 (1994-03-01), Murty et al.
patent: 5367448 (1994-11-01), Carroll
patent: 5973942 (1999-10-01), Nelson et al.
patent: 6043997 (2000-03-01), He et al.
patent: 6091233 (2000-07-01), Hwang et al.
patent: 6175218 (2001-01-01), Choi et al.
patent: 6178104 (2001-01-01), Choi
patent: 6218818 (2001-04-01), Kim
patent: 6259613 (2001-07-01), Lee et al.
patent: 7112935 (2006-09-01), Fujino et al.
patent: 7138778 (2006-11-01), Fujino et al.
patent: 2002/0021100 (2002-02-01), Brown
patent: 0478808 (1992-04-01), None
patent: 0963034 (1999-12-01), None
patent: 1271759 (2003-01-01), None
patent: 2086156 (1982-05-01), None
patent: 59025589 (1984-02-01), None
patent: 851736 (1996-02-01), None
patent: 8126312 (1996-05-01), None
patent: 10271883 (1998-10-01), None
patent: 11235087 (1999-08-01), None
patent: 2000245150 (2000-09-01), None
patent: 2000350448 (2000-12-01), None
patent: 2000350462 (2000-12-01), None
patent: WO 00/26740 (2000-05-01), None
patent: WO 00/33453 (2000-06-01), None
patent: WO 01/71895 (2001-09-01), None
Ro Bentsu
Townsend and Townsend / and Crew LLP
LandOfFree
System for operating DC motors and power converters does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for operating DC motors and power converters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for operating DC motors and power converters will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4167952