Patents
Patents for H02K 29 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices (10,091)
08/1988
08/10/1988CN87204668U Single-pole brushless dc motor
08/09/1988US4763053 Electronically commutated DC machine and use thereof
08/09/1988US4763051 Driving and positioning system
08/09/1988US4763050 Driving and positioning system
08/02/1988US4761590 Electric motor
08/02/1988US4761576 Motor driven air moving apparatus for high speed, constant duty operation
07/1988
07/26/1988US4760298 Magnetic disk motor having a cup-shaped rotor
07/20/1988EP0274638A1 Optical modulator for a radiation pyrometer
07/19/1988US4758768 12-step commutation device for an electric motor
07/19/1988US4758751 Thin type DC brushless motor
07/12/1988US4757222 1-phase energized disk-type brushless motor
07/05/1988US4755728 Single-phase semiconductor electric motor and fan using the same
07/05/1988US4755701 Brushless motor having a frequency signal generator and a pulse signal generator
07/05/1988US4755699 Enclosed miniature motor
06/1988
06/30/1988WO1988004787A1 Rotary device
06/28/1988US4754207 Electromagnets with adjacent groups of electromagnets having different switching phases
06/21/1988USRE32702 Brushless D.C. motor assembly
06/15/1988CN87214461U Improved ac permanent magnetic brushless servomotor
06/14/1988US4751486 Magnetic rotation apparatus
06/14/1988US4751448 Armature winding for a static converter-fed electrical induction machine
06/14/1988US4751415 Brushless DC motor with means for compensating ripple torque
06/14/1988US4751413 Solar energy motor
06/08/1988EP0270477A2 D.C. motor
06/01/1988EP0269170A2 Brushless direct current electric motor for small outputs
05/1988
05/31/1988US4748362 D. C. motor with multi-tooth poles
05/25/1988CN86107654A Electric and magnetic mixed excitation system
05/24/1988US4746844 Control and operation of brushless continuous torque toroid motor
05/24/1988CA1237184A1 Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives
05/18/1988EP0267301A1 System for remote transmission of angle of rotation and of force between driving and driven shafts
05/17/1988US4745345 D.C. motor with axially disposed working flux gap
05/17/1988CA1236876A1 Electric motor and tachometric generator unit
05/11/1988EP0266862A1 Improved brushless D.C. dynamoelectric machine
05/11/1988EP0266598A2 Electrical servo-control
05/10/1988US4743825 Synchronous motors and a control system thereof
05/10/1988US4743813 Direct current motor with electronic commutation circuit and encoder-controlled winding power
05/10/1988US4743786 Rotational position detection device
05/10/1988US4743173 Slide beating unit for small size fan
05/05/1988DE3737050A1 Electric motor
05/05/1988DE3637480A1 Electric servo drive
05/05/1988DE3637479A1 Servodrive having an AC machine
05/04/1988EP0265539A1 Single-phase brushless motor
04/1988
04/28/1988DE3736033A1 DC motor which has a disc-shaped rotor but no commutator
04/26/1988US4740733 Autosynchronous motor comprising a device for determining the position of the rotor relative to the stator, and method of starting such motor
04/20/1988EP0263890A1 1-Phase energized brushless motor
04/19/1988US4739203 Single-phase brushless motor with cogging features
04/12/1988US4737675 Brushless motor with center leads for preventing signal distortion
04/12/1988US4737674 Single phase brushless motor with a core
04/12/1988US4737672 Resin layer reinforced with aromatic polyamide
04/07/1988DE3632014A1 Electrical machine, especially an electric motor
03/1988
03/29/1988US4734627 Brushless D.C. motor having two conductors per phase energized alternately by complementary-conductivity-type semiconductors controlled by the same rotor-position signal, at times modified by a compensating technique
03/29/1988US4734603 Motor control mounting
03/24/1988WO1988002192A1 Improved brushless d.c. motor
03/22/1988US4733119 1-Phase self-starting disk-type brushless motor with cogging-producing element
03/22/1988US4733118 Low damping torque brushless D.C. motor
03/22/1988US4733115 Electric motor
03/16/1988EP0259724A1 Conductor plate
03/15/1988US4731554 Low profile ring-shaped motor
03/10/1988DE3629423A1 Cylindrical stator, its production, and an electronically commutated DC machine equipped with this stator
03/08/1988US4730150 D.C. multi-phase bi-polar brushless motor
03/08/1988US4730136 Two-pulse permanent magnet brushless D-C motor
03/02/1988EP0052343B1 Electric machine
03/01/1988US4728833 1-phase self-starting brushless motor
02/1988
02/24/1988EP0256132A1 Magnetic rotary device
02/23/1988US4726746 Electrically-operated fuel pump
02/17/1988CN86105770A Seitching-type magnetoresistance motor with four phase four line connection
02/16/1988US4725752 1-phase self starting disk-type brushless motor with cogging element
02/16/1988US4725751 Electrical machine
02/10/1988EP0255736A1 Automatic tool exchange apparatus
02/09/1988US4724368 Multiple phase electronically commutated torque motor
02/09/1988US4724350 1-phase self starting disk-type brushless motor with cogging element
02/09/1988US4724348 Rotatable assembly for dynamoelectric machines having means for reducing release of magnet material particles therefrom
02/09/1988US4724347 Collectorless direct-current motor
02/09/1988US4724346 Permanent magnet-excited external rotor motor
02/02/1988US4723100 Brushless motor with a rotor pole position detector associated with each armature winding and electrically connected to another armature winding
01/1988
01/19/1988US4720662 Motor having alternator coils
01/12/1988US4719419 Apparatus for detecting a rotary position of a shaft
01/12/1988US4719378 Brushless motor having permanent magnet rotor and salient pole stator
01/07/1988EP0251918A1 Angle position sensor and appliance for determining the angular position using several of said sensors
01/07/1988EP0251350A2 Electric motor
01/07/1988DE3622231A1 Permanent-magnet rotor for electrical machines
01/05/1988US4717850 Two-pulse brushless d.c. motor with auxiliary rotor poles
12/1987
12/30/1987CN87104183A Miniature motor fitted with speed governor
12/23/1987DE3607271A1 Brushless amplitude-controlled AC drive
12/16/1987EP0248946A1 Cored armature for an inner rotor motor
12/08/1987US4712035 Salient pole core and salient pole electronically commutated motor
12/03/1987WO1987007419A1 System for remote transmission of angle of rotation and of force between driving and driven shafts
12/02/1987EP0247997A1 Rotary transmitter
12/01/1987US4710683 Rotation detecting apparatus
12/01/1987US4710667 Brushless D.C. dynamoelectric machine with decreased magnitude of pulsations of air gap flux
11/1987
11/25/1987EP0246671A2 Coreless-brushless motor
11/25/1987EP0246670A2 Method of forming interconnect sections of a coreless-brushless motor
11/25/1987EP0246325A1 Cross-flow cooling fan device
11/17/1987US4707645 Single-phase brushless motor
11/11/1987EP0244487A1 Cross-flow cooling fan device
11/03/1987US4704567 Brushless D.C. motor having alternating wider and narrower pole shoes
11/03/1987US4704566 Self-starting disk-type brushless motor with screw projection for generating cogging
10/1987
10/27/1987US4703235 Brushless DC motor
10/27/1987US4703212 Direct-current motor
10/27/1987US4703211 Slotless brushless DC motor
10/27/1987US4703209 Electric motor, especially collectorless d.c. motor, with an outside rotor
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