Patents
Patents for H02K 29 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices (10,091)
05/1991
05/02/1991EP0425312A2 Spindle motor assembly for a disk drive
04/1991
04/30/1991US5012169 Motor drive system
04/28/1991CA2027225A1 Spindle motor assembly for disc drives
04/23/1991US5010268 Electrical multi-pole machine
04/23/1991US5010267 Variable speed machine with high power density
04/23/1991US5009436 Magnetic fluid seal assembly
04/17/1991CN2075400U Motor without both position sensor and brush
04/16/1991US5008573 Magnetic disk enclosure with detachable stator
04/11/1991DE3932802A1 Brushless high speed DC vacuum cleaner motor - has electronic commutation for hazardous applications using Hall-effect sensors in permanent magnet rotor with in-built stator current limit
04/10/1991EP0421346A2 Method for producing an electric rotary machine such as a motor of DC brushless type
04/10/1991EP0420885A1 Tacho generator
04/09/1991US5006943 Disk storage drive
04/09/1991US5006765 DC motor with coreless coil installation
04/09/1991US5006745 Polyphase direct current motor
04/09/1991US5006744 Integrated electronically commutated motor and control circuit assembly
04/09/1991US5006045 Scroll compressor with reverse rotation speed limiter
04/04/1991WO1991004602A1 Three-phase reluctance motor
04/03/1991EP0420501A1 Method and apparatus for detecting the rotor position of a brushless DC motor
04/02/1991US5004944 Lightweight high power electromagnetic transducer
03/1991
03/27/1991EP0418712A1 Position sensor
03/27/1991CN2074078U Permanent-magnet brushless d.c. motor
03/21/1991WO1991003858A1 Reactance type motor
03/19/1991US5001581 Disk storage drive
03/19/1991US5001405 Position detection for a brushless DC motor
03/19/1991US5001375 D. C. electric motor
03/12/1991US4998865 Brushless DC pump with enclosed circuit board
03/07/1991WO1991002735A1 Chemical compounds based on a netropsin or distamycin molecule coupled with an intercalating agent, method for preparing said compounds and pharmaceutical compositions containing same
03/07/1991DE4027245A1 Digital regulator for servomotor with interchangeable circuit board - contains additional printed circuit board for transmission of angle data from commutation sub-assembly to positioning module
03/06/1991EP0415076A2 Suction cleaner
03/06/1991CN1049668A Process for preparing sequence of antidirection direction, antimessenger rna oligonuclectides of alpha tnf
03/05/1991US4998052 Gearless direct drive switched reluctance motor for laundry application
03/05/1991US4998032 A brushless DC
03/05/1991CA1281066C2 Ironless, brushless d.c. motor with wave winding
02/1991
02/27/1991EP0414607A2 Anti-sense nucleotide sequence, anti RNA against alpha TNF messenger RNA, process for the preparation thereof, medical use thereof and its inclusion in pharmaceutical preparations
02/27/1991CN1049578A Electric motor with random coaxial reversing
02/26/1991US4995159 Method of making an electronically commutated reluctance motor
02/20/1991EP0413113A2 Electronically commutated motor for vacuum cleaner and the like
02/20/1991EP0412993A1 Tape drive machines.
02/19/1991US4994702 Motor
02/13/1991EP0412340A1 Synchronmotor, preferably electronically commutated servomotor with permanent magnet excitation
02/12/1991US4992688 Printed circuit board with a metallic layer for supporting an electrical component
02/07/1991WO1991001584A1 Radial drive for implantable centrifugal cardiac assist pump
02/05/1991US4990843 Reluctance motor
01/1991
01/30/1991EP0410784A1 Drive for laundry machines
01/30/1991EP0410293A1 Spindle motor
01/30/1991EP0410047A1 Improvements to brushless tachogenerators with position sensor for brushless motors
01/29/1991US4988905 Integrated driver-encoder assembly for brushless motor
01/24/1991WO1991001062A1 Method of and device for controlling induction motor for compressor
01/23/1991EP0409661A1 Motor
01/22/1991US4987333 Electric motor with inner drive pulley
01/22/1991US4987331 Non-brush D.C. motor with an improved stator
01/22/1991US4987329 Motor magnet arrangement
01/22/1991CA2021663A1 Motor
01/15/1991US4985792 Disk drive spindle motor with externally mounted flux concentrator ring
01/15/1991US4985669 Electrical rotating machine
01/11/1991CA2020735A1 Radial drive for implantable centrifugal cardiac assist pump
01/02/1991EP0405258A2 Rotary electric machine
01/02/1991EP0236467B1 Electric motor
01/01/1991US4982125 Brushless motor
12/1990
12/27/1990EP0404299A1 Brushless motor
12/25/1990US4980594 Compact servomator having an integrally wound resolver
12/25/1990US4980590 Flat brushless motor with a back-yoke formed as an eccentric weight to induce vibrations
12/25/1990US4980587 Spindle motor with precision bearings
12/18/1990US4978878 Electric multipolar machine
12/18/1990CA1278015C Stator assembly for dynamoelectric machine
12/12/1990EP0402179A1 An electric motor
12/06/1990DE3916870A1 Dynamoelectric machine for vehicle drive and regenerative brake - has pulsed commutation, speed, direction and output control using solid state circuitry and cylindrical or salient pole construction
12/04/1990US4975608 Switched reluctance motor with full accommutation
12/04/1990US4975607 Frequency generator with superimposed generation coil
11/1990
11/27/1990US4973869 Brushless coreless DC motor
11/20/1990US4972112 Brushless DC motor
11/14/1990EP0397143A1 Electronically commutated direct-current motor
11/13/1990US4970423 Stepper motor with a rotor teeth sensor
11/12/1990CA2015605A1 Electronically commutated dc motor
11/07/1990EP0395747A1 Polyphase electronically commutated reluctance motor
11/07/1990CN1046820A Impulse magneto
11/06/1990US4968921 Electromagnetic motor with secondary stator coils
11/06/1990US4968913 Two-phase brushless motor
10/1990
10/31/1990DE3914082A1 Electronically-commutated electric motor - has currents in stator windings overlapped during commutation process
10/30/1990CA1275679C Motor driven air moving apparatus for high speed, constant duty operation
10/24/1990EP0393266A1 Improved spindle motor for a disc drive
10/24/1990CN1046417A Electronic commutated dc motor
10/23/1990US4965476 Stabilized disk drive spin motor
10/18/1990DE3911602A1 DC motor with permanent magnet rotor and pulsed stator - has electronic commutation, axially aligned stator slots, two layer trifurcated winding and uneven slot count
10/17/1990CN2064130U Plane suspension motor and its controller
10/16/1990US4963808 Motor control apparatus
10/16/1990US4962583 Tunnel type or dragon-gate type processing system assembled with selected elements and its related interface means
10/11/1990DE3915356A1 Electric motor with reduced vibration for acoustically sensitive area - has asymmetric air gap for generating magnetic side thrust on output shaft to minimise effect of pulsed torque variation
10/04/1990WO1990011641A1 Electronically commutated reluctance motor
10/04/1990DE4008912A1 Superconducting electric machine - has one superconducting magnet which is held stationary in housing surrounding shaft
10/04/1990DE3910498A1 Tachogenerator having a rotor position transmitter for a three-phase servomotor with rotation-speed regulation and electronic commutation
10/02/1990US4961017 Stator for use in a brushless motor
09/1990
09/30/1990CA2013512A1 Circumferential motor
09/27/1990CA2011732A1 Axial gap superconducting electrical machine
09/26/1990EP0388965A2 Brushless electric motor
09/25/1990US4959595 Rotating electric machine having a coil coaxial with rotating shaft
09/25/1990CA1274572A1 Electronically commutated motor
09/20/1990WO1990007220A3 Electrically switched synchronous motor drive
09/19/1990EP0387467A2 Switched reluctance motor and operating method
09/19/1990CN2062518U Axial exciting induction motor