US Patent No: 4,208,621

Number of patents in Portfolio can not be more than 2000

Brushless DC motor control system

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Abstract

A closed control system for controlling the operation of a multiple horsepower brushless direct current motor wherein a current feedback signal representative of the effective motor drive current is constructed from the instantaneous currents flowing in the stator windings. Protective circuitry is provided to shutdown the output power stages in the event of component failures to prevent catastrophic failure of other components in the system.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ELECTRO-CRAFT CORPORATIONHOPKINS, MN8

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hipkins, Dennis R Plymouth, MN 2 33
Schiedermayer, Marvin L Appleton, WI 2 37

Cited Art

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (4)
4,500,821 Speed or torque control circuit for an electronically commutated motor (ECM) and method of controlling the torque or speed of an ECM 55 1983
4,499,408 Control circuit for an electronically commutated motor, an integrated circuit for an ECM, and a method of operating an ECM 23 1983
4,494,055 Control circuit for an electronically commutated motor including reversing; method of operating an ECM including reversing 28 1983
4,491,772 Control circuit for an electronically commutated motor (ECM), method of timing the electronic commutation of an ECM, and method of operating an ECM 21 1983
 
2112376 ONTARIO LIMITED (2)
7,265,516 Linear electric motor controller and system for providing linear control 0 2001
7,622,885 Linear electric motor controller and system for providing linear control 0 2007
 
ELECTRIC BOAT CORPORATION (2)
5,933,339 Modular static power converter connected in a multi-level, multi-phase, multi-circuit configuration 42 1998
6,340,851 Modular transformer arrangement for use with multi-level power converter 42 1999
 
KOLLMORGEN CORPORATION (2)
4,782,272 Electrical drive systems 48 1985
5,173,651 Electrical drive systems 39 1988
 
MOOG INC. (2)
8,183,810 Method of operating a motor 0 2009
8,164,293 Method of controlling a motor 0 2009
 
AMETEK PITTMAN, INC. (1)
5,012,167 Sinusoidal signal decoder for 12-step motor commutation 3 1990
 
Buehler Products, Inc. (1)
4,680,515 Digital speed control of motors 27 1985
 
DISNEY ENTERPRISES, INC. (1)
5,349,276 Control system for regulating motor speed 17 1993
 
FAIRCHILD KOREA SEMICONDUCTOR LTD. (1)
6,064,175 Sensorless three-phase brushless DC motor drive circuit 13 1998
 
Felchar Manufacturing Corporation (1)
5,177,657 Ground fault interruptor circuit with electronic latch 26 1991
 
NIDEC SR DRIVES LTD. (1)
6,181,092 Current control circuit for a reluctance machine 19 1996
 
PANASONIC ECOLOGY SYSTEMS GUANGDONG CO., LTD. (1)
8,188,627 Temperature protection device for brushless DC motor 0 2008
 
PELKO ELECTRIC (HK) LTD. (1)
6,731,082 DC motor constant speed PWM control 7 2002
 
RENESAS ELECTRONICS CORPORATION (1)
5,874,817 Motor driving circuit for a three-phase brushless motor 6 1996
 
ROHM CO., LTD. (1)
7,848,066 Motor drive device and electronic device using the same 0 2006
 
SANYO ELECTRIC CO., LTD. (1)
4,748,386 Controller of brushless DC motor 27 1986
 
SIEMENS AKTIENGESELLSCHAFT (1)
4,777,414 Driving arrangement for a drive motor 4 1987
 
STA-RITE INDUSTRIES, LLC (1)
8,297,369 Fire-extinguishing system with servo motor-driven foam pump 0 2009
 
STRATOS INTERNATIONAL, INC. (1)
6,160,647 Optoelectronic transmitter with improved control circuit and laser fault latching 65 1997
 
The Boeing Company (1)
4,528,486 Controller for a brushless DC motor 68 1983
 
ZEXEL CORPORATION (1)
5,296,789 Apparatus for controlling brushless motors in response to switching transistor temperature 11 1993
 
Other [Check patent profile for assignment information] (1)
5,059,875 Motor and controller 3 1989