1
Rolf Muller: Brushless direct current motor system. Papst Motoren & Co KG, Fitch Even Tabin & Flannery, November 19, 1985: US04554473 (76 worldwide citation)

The invention relates to a brushless direct current motor system and includes a switching circuit support mounted on stationary parts of the motor. The switching circuit support with electronic drive means is part of the stator and is disposed inside the rotatable housing. The axial extension of the ...


2
Richard L Porter: Direct current brushless motor. The United States of America represented by the Secretary of the Air Force, Berard E Franz, Donald J Singer, January 12, 1993: US05179307 (74 worldwide citation)

The variable speed, reversible, brushless, direct current motor comprises a rotor, electromagnets a switching transistor module and electronic controller module. The rotor is mounted on a shaft with bearings at each end, with a plurality of permanent magnets symmetrically placed thereon in an altern ...


3
Francesco Carobolante, Ermanno Pace, Mark McCormack: Brushless direct current motor starting and operating apparatus and method. SGS Thomson Microelectronics, Ronald S Lombard, Richard K Robinson, May 21, 1991: US05017845 (65 worldwide citation)

A starting and operating apparatus and method for a sensorless, brushless direct current motor is disclosed. During start-up, the excitation to the motor is turned off while the slope of the differential back electromotive force of the floating phases is sampled. This indicates when the proper rotat ...


4
Johann von der Heide, Rolf Muller, Ernst Moritz Korner: Electric motor, particularly a brushless direct current motor. Papst Motoren & Co KG, Fitch Even Tabin & Flannery, March 3, 1987: US04647803 (64 worldwide citation)

Electric motor with a substantially cylindrical air gap between the stator and the rotor, the stator being fitted to a bearing support for the rotor shaft bearing. In order to reduce noise emissions, the stator is connected to the bearing support by means of an elastic damper and the stator and bear ...


5
William D Riggs, Joseph J Schegan: Brushless direct current motor. North American Philips Corporation, Robert S Smith, January 19, 1982: US04311933 (61 worldwide citation)

A brushless D.C. motor has electrical power switched between the phase windings by means of a circuit which includes a plurality of hall effect switches. The hall effect switches are operated by a plurality of arcuate commutating magnets which are radially polarized and are disposed axially adjacent ...


6
Francesco Carbolante: Brushless direct current motor with minimized current ripple and method. SGS Thomson Microelectronics, Ronald S Lombard, Richard A Bachand, Lisa K Jorgenson, March 2, 1993: US05191269 (59 worldwide citation)

A brushless direct current motor with minimized current ripple and a method is disclosed. The motor system includes commutation current control for controlling the rate of turn-off of the current flowing in the phase being turned-off while simultaneously controlling the rate of turn-on of the curren ...


7
Byungkyu Kim, Joon Kim, Boris Bazarov, Donghoon Kim: Coreless-type BLDC motor and method of producing stator assembly having axial vibration attenuation arrangement. Amotron, McDermott Will & Emery, August 31, 1999: US05945766 (48 worldwide citation)

A double rotor-type brushless direct-current motor includes first and second annular-shaped rotors each having a plurality of north and south-polar magnets which are alternately disposed at a predetermined distance; a rotating shaft connected to a central portion of the rotors thorough a bushing; up ...


8
Koujirou Yamashita, Stunehiro Endo, Kunio Miyashita, Susumu Kashiwazaki, Kenichi Iizuka: Speed control apparatus for a brushless direct current motor. Hitachi, Antonelli Terry & Wands, August 8, 1989: US04855652 (48 worldwide citation)

AC power supply is converted to DC by a rectifier circuit. The DC is stepped up by a step-up chopper circuit. The output of the step-up chopper circuit is smoothed by a smoothing circuit. The output of the smoothing circuit is input to an inverter via a current detecting circuit and a voltage detect ...


9
Rolf Muller: Brushless direct current motor system. Papst Motoren & Co K G, Fitch Even Tabin & Flannery, October 6, 1987: US04698542 (46 worldwide citation)

The invention relates to a brushless direct current motor system that includes an outer rotor receiving a load member such as a fan wheel having a plurality of blades. An axial extension of the rotor functions as a drive boss whose diameter is independent of the diameter of the motor stator core and ...


10
William G Anderson, William C McAdams: Brushless direct current motor having adjustable motor characteristics. MTS Systems Corporation, Westman Champlin & Kelly, March 25, 1997: US05614799 (41 worldwide citation)

A brushless direct current motor includes a permanent magnet mounted to a rotor and a set of commutated stator windings. The motor further includes a circuit for changeably connecting the set of stator windings to operate in a first electrical configuration or a second electrical configuration and a ...