Patents
Patents for H02K 29 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices (10,091)
08/1994
08/23/1994CA2115854A1 Single phase electronically commutated motor system and method
08/23/1994CA2000556C Capacitively commutated brushless dc servomotors
08/17/1994EP0610767A2 Electric motor, particularly a converter-fed asynchronous motor for propelling motor vehicles
08/10/1994EP0609800A1 Switched reluctance motor as traction motor for electric drive vehicle
08/09/1994US5337030 Permanent magnet brushless torque actuator
08/09/1994US5336956 Brushless dynamo machine with novel armature construction
08/04/1994WO1994017582A1 Electromagnetically powered rotary motor apparatus and method
08/04/1994DE4311274A1 Switched reluctance traction motor
08/02/1994USRE34684 Drive motor for magnetic disks, optical disks, and magneto-optical disks
08/02/1994US5334899 Polyphase brushless DC and AC synchronous machines
08/02/1994US5334898 Polyphase brushless DC and AC synchronous machines
08/02/1994CA1331103C Drives for clothes washing machines
07/1994
07/28/1994DE4402411A1 Permanent-magnet synchronous motor with current-smoothing mechanism
07/28/1994DE4334482A1 Synchronous motor with perforated flux guides on outer part of stator
07/28/1994DE4302042A1 Compact, flat construction electromotor
07/26/1994US5332374 Axially coupled flat magnetic pump
07/26/1994CA1330882C Electrically commutated motor having an edgewise wound yoke
07/21/1994DE4343933A1 Electric drive for appts. with several, coaxial, driven shafts
07/19/1994US5331245 Permanent magnet excited electric motor with improved torque ripple
07/19/1994US5331244 Permanent magnet DC machine having meander-like stator windings for producing high torque without excessive heating
07/14/1994DE4300145A1 Storage disk collectorless drive motor
07/12/1994US5329195 Sensor motor
07/12/1994US5327790 Reaction sensing torque actuator
07/05/1994US5327069 Switched reluctance machine including permanent magnet stator poles
07/05/1994US5327064 Brushless motor incorporating an integrated circuit having a single chip peripheral circuit
07/05/1994US5327034 Electrically motorized wheel assembly
07/05/1994US5327033 Micromechanical magnetic devices
06/1994
06/28/1994US5325006 Sealed magnetic fluid bearing for polygon mirror drive motor
06/28/1994US5325005 Motor commutation
06/23/1994WO1994014226A1 Motor system with individually controlled redundant windings
06/21/1994US5323075 Hall effect sensors embedded within two-pole toothless stator assembly
06/16/1994DE4241553A1 Washing machine drive is fed via frequency transformer - features raised secondary resistance of rotor to improve effectiveness at lower speeds
06/16/1994DE4241522A1 Reluctance motor with magnetic circuit completed through unwound rotor - uses cruciform, beam-shaped, star-shaped or disc-shaped rotor with opposite magnetic poles excited at its ends by stator windings
06/14/1994US5319844 Method of making an electromagnetic transducer
06/09/1994WO1994013052A1 High power self-controlled multi-phase synchronous machine
06/09/1994WO1994013051A1 Brushless dynamoelectric machine with specialized armature construction
06/08/1994EP0600110A1 Magnetic speed reducer
06/07/1994US5319271 Pulse signal generating device
06/07/1994US5319270 Electric motor
06/01/1994CN1024878C Brushless step-governor d. c. motor
06/01/1994CN1024877C DC motor with magnetic pole and magnetic field commutator
05/1994
05/26/1994WO1994011945A1 Method of observer-based control of permanent-magnet synchronous motors
05/26/1994DE4238886A1 Disc store automatic data storage disc prodn. with disc(s) in flat housing - from composite with inner and outer layers of soft magnetic steel sheet and core of flexible plastics with integrated circuitry
05/26/1994CA2148466A1 Method of observer-based control of permanent-magnet synchronous motors
05/18/1994EP0597678A1 Integral bearing type electric motor
05/17/1994US5313159 Magnetic encoder with composite magnet
05/11/1994EP0596682A1 Motor with position sensing
05/10/1994US5311092 Lightweight high power electromagnetic transducer
04/1994
04/28/1994WO1994009549A1 Composite magnet brushless dc motor
04/27/1994EP0593913A2 Electrically driven hydraulic pump
04/26/1994US5306996 AC/DC stepped drive system
04/26/1994US5306183 Propulsion systems for submarine vessels
04/21/1994DE4244721A1 Elektrische Maschine mit fluidgekühlten Halbleiterelementen Electrical machine with fluid-cooled semiconductor elements
04/20/1994EP0431006B1 An electric motor
04/20/1994CN1085694A Brushless motor
04/19/1994US5304886 Printed circuit motor
04/13/1994EP0592083A1 Permanent magnet brushless torque actuator
04/06/1994EP0590185A1 Electromagnetic motor
04/06/1994EP0368930B1 A motor or alternator
03/1994
03/31/1994DE4229261C1 Electric generator for bicycle or individual wheel with rotor at rotatable wheel - equipped with permanent magnets and stator formed by coil system for receiving induced voltage is fixed on wheel spindle and generator can be used as servo motor
03/24/1994DE4231784A1 Electrically-driven hydraulic pump - cools control stage for collectorless electric motor by hydraulic fluid handled by pump
03/23/1994EP0588478A2 Electric stepper motor
03/23/1994EP0588448A2 Electric motor
03/23/1994EP0587812A1 Electrical machines.
03/23/1994EP0587643A1 Head drum for a recorder.
03/17/1994WO1994006198A1 Quasi square-wave back-emf permanent magnet ac machines with five or more phases
03/16/1994CN1083981A Permanent magnetic rotator of brushless electric motor and manufacture thereof
03/15/1994US5294856 Shifted pole single phase variable reluctance motor
03/03/1994WO1994005075A1 Permanent magnet rotor of brushless motor and production method thereof
03/03/1994WO1994005074A1 Brushless dc motor and its driving method
03/03/1994CA2142089A1 Permanent magnet rotor of brushless motor and production method thereof
03/02/1994CN1083279A Brushless DC motor and method for rotative driving of same
03/01/1994US5291357 Magnetic recording device having reduced electromagnetic interference
03/01/1994US5291104 DC commutatorless motor
02/1994
02/22/1994US5289069 Brushless motor
02/22/1994US5289066 Stator for dynamoelectric machine
02/17/1994WO1994003779A1 Position detection apparatus
02/16/1994CN2156615Y Electronic dc motor
02/02/1994EP0581173A1 Fuel supply device
02/02/1994CN1081543A Motor controlled by rotating magnetic field switch
02/01/1994US5283485 Small-size motor and a process for manufacture and use thereof
01/1994
01/26/1994CN1081292A Magnetic motor construction
01/20/1994WO1994001920A1 Brushless motor
01/20/1994WO1994001919A1 Fault-tolerant reluctance motor
01/20/1994WO1994001917A1 Electric motor-wheel
01/20/1994CA2139584A1 Brushless motor
01/18/1994US5280211 Motor and/or generator operating according to the reluctance principle
01/13/1994DE4222370A1 Fehlertoleranter Reluktanzmotor Fault-tolerant reluctance motor
01/12/1994EP0577843A1 Reluctance motor and rotor of high-speed reluctance motor
01/11/1994US5278482 Three-phase reluctance type motor
01/11/1994US5278468 Structure for a DC motor with an electronic commutation
01/06/1994WO1994000903A1 Magnetic motor construction
01/05/1994DE4220458A1 Electric motor with safety brake - comprises DC motor with high reluctance torque having permanent magnet rotor
12/1993
12/29/1993EP0576307A1 Autosynchronous motor and electric traction system using an autosynchronous motor
12/29/1993EP0576252A2 Magnetic motor construction
12/29/1993CN1080050A A rolor position detecting apparatus for a brushless motor
12/21/1993US5272402 Electrical machine with device for detecting rotor position and rotational speed
12/16/1993DE4218888A1 Commutator machine with stator poles facing magnetised rotor segments - has oppositely wound pairs of pole pieces broadened into faces aligned with radially magnetised segments of external rotor
12/16/1993DE4217289A1 Fluid-cooled power transistor device, e.g. IGBT, MOSFET or BIMOS for controlling machine
12/15/1993EP0574039A1 Brushless motor
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