Patents
Patents for H02K 29 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes, semiconductor devices (10,091)
12/1989
12/27/1989CN2050236U Single-winding armature direct current non-brush motor
12/19/1989US4888538 System for remote transmission of angular position and force between master and slave shafts
12/19/1989US4888530 Two-phase gate motor
12/19/1989US4888513 Reluctance electric machine having a decreased cross section of rotor ferromagnetic material
12/19/1989US4888509 Brushless servo motor construction and alignment
12/19/1989US4888481 Aligning and protective cover for a motor
12/14/1989DE3918953A1 External rotor motor without a commutator
12/14/1989DE3908313A1 Commutatorless permanent-magnet DC motor
12/13/1989EP0345796A2 Ventilator driven by an electric motor
12/06/1989EP0345150A1 Electric motor with electronic commutation, particularly for driving a fluid displacement machine, in particular a hair dryer equipped with such a motor
12/06/1989CN2049044U Dc motor without brush
12/05/1989US4885488 Miniaturized fan for printed circuit boards
11/1989
11/30/1989WO1989011751A1 Electric machine
11/30/1989WO1989011750A1 A work generating device driven by an electric motor
11/30/1989WO1989011523A2 Rotor position sensing
11/29/1989EP0343481A2 Device and method for controlling brushless four-phase DC motors
11/28/1989US4884000 Brushless DC motor inner tachometer
11/28/1989US4883999 Polyphase electronically commutated reluctance motor
11/28/1989US4883982 Electronically commutated motor, blower integral therewith, and stationary and rotatable assemblies therefor
11/28/1989US4883981 Dynamoelectric machine having ironless stator coil
11/23/1989EP0342606A1 Electric machine
11/21/1989US4882643 Disc drive motor
11/21/1989US4882524 Multi-phase bipolar brushless D.C. motor
11/21/1989US4882511 Brushless three-phase D.C. motor
11/16/1989WO1989011148A2 Tape drive machines
11/15/1989EP0341630A2 Permanent magnet type synchronous motor
11/08/1989CN2047464U Pattern type photoelectric sensor for brushless motor control
11/08/1989CN1037058A Multi-phase bipolar brushless d.c. motor
11/02/1989EP0339765A2 Disk drive spindle motor
11/02/1989DE3813065A1 Electric motor
11/02/1989DE3813064A1 Device for adjusting the rotor position identification system
10/1989
10/25/1989EP0338610A2 Electrical synchronous reluctance machine provided with intrinsic phase adjusting means
10/25/1989EP0338267A2 D. C. motor
10/24/1989US4876492 Electronically commutated motor driven apparatus including an impeller in a housing driven by a stator on the housing
10/17/1989US4875110 Rotary head apparatus with motor magnet and yoke surrounding motor stator coil
10/17/1989US4874976 Spindle motor for driving discs
10/17/1989US4874975 Brushless DC motor
10/12/1989DE3821557C1 Electronically commutated miniature DC motor
10/11/1989EP0336078A1 Apparatus for the measurement of the rotational speed and the position of a rotor of an electric machine
10/10/1989US4873463 D.C. electric motor
10/04/1989CN2045555U Electronic regulating and controlling brushless motor for electric bicycle
09/1989
09/26/1989US4870358 Angular position sensor and angular position determination means equipped with several of these sensors
09/26/1989US4868970 Method of making an electric motor
09/26/1989CA1260522A1 Brushless dc motor
09/20/1989CN2044773U Rotor for permanent-magnet excited motor
09/19/1989US4868479 Low loss permanent magnet motor
09/19/1989US4868468 Screened inductance sensors for brushless d.c. motors
09/19/1989US4868443 Tachogenerator for electric machines
09/19/1989US4867581 Bearing housing, especially for a unilaterally and axially braced external-rotor motor
09/19/1989CA1259653A1 Variable speed variable reluctance electrical machines
09/12/1989US4866324 Brushless motor
09/12/1989CA1259406A1 Disc drive system having a plurality of large sized rigid magnetic discs driven by a directly coupled dc brushless motor
09/08/1989WO1989008346A1 Electric machine
09/06/1989EP0331180A1 Electric machine
09/06/1989CN1035398A Motor or alternator
09/05/1989US4864199 Electronically controlled electric motor with variable power output
09/05/1989US4864174 Generator device
09/05/1989CA1259099A2 Drive and positioning system
08/1989
08/29/1989US4862044 Method for adjusting encoder in a brushless motor-encoder combination
08/22/1989US4859890 Flat windings and coil forms
08/22/1989US4859888 Cross flow type cooling fan device
08/15/1989US4858044 Disc drive spindle motor with low cogging torque
08/15/1989US4857784 Motor having rotation speed detection mechanism
08/15/1989US4857783 Brushless direct current motor incorporating a magnetically influenced switch
08/10/1989WO1989007305A1 Device for remote transmitting of rotation angle and torque between driving and driven shaft
08/09/1989CN1034643A A single-pole stator dc and ac universal electric machine
08/09/1989CN1004984B Electrically powered apparatus
08/08/1989US4855629 DC brushless motor with three teeth and two windings
08/01/1989US4853571 Intermediate bearing drives for clothes washing machines
08/01/1989US4853567 Direct drive motor
07/1989
07/19/1989CN2041463U Dc brushless motor
07/12/1989EP0323860A2 Driving and positioning system
07/11/1989US4847712 Disc drive spindle motor with log cogging torque
07/11/1989US4847527 Hall effect assembly for mounting to stators
07/11/1989US4847526 Variant-pole electric motor
07/05/1989EP0322804A1 Air conditioner equipped with scroll type compressor
07/04/1989US4845411 Brushless DC motor and encoding technique
06/1989
06/27/1989US4843500 Disk storage drive
06/27/1989US4843269 Large air gap motor
06/27/1989US4843268 Asymmetric field electromagnetic motor
06/22/1989DE3838367A1 Electric motor for operation in an apparatus which can resonate
06/21/1989EP0321332A1 Highly efficient electric motor showing low torque ripple
06/20/1989US4841393 Spindle motor for a disc drive
06/20/1989US4841187 Electric motor with attached tachogenerator
06/20/1989US4841186 Electronically commutated, collectorless directed-current motor
06/20/1989CA1256153A1 Drive and positioning system
06/20/1989CA1256152A1 Three-phase brushless motor
06/15/1989WO1989005537A1 Electric motor
06/13/1989US4839552 Brushless DC motor
06/13/1989US4839551 Brushless motor structure enabling accurate relative positioning of rotor and stator coils
06/13/1989US4839546 Rotational noise reduction structure in dc motor with rotor magnets
06/13/1989CA1255731A1 Slotless and toothless wound stators and methods of production
06/06/1989US4837474 D.C. motor
06/06/1989US4836631 Laser scanning motor having a rotating polygonal mirror and method of manufacturing the same
06/06/1989US4835839 Method of fabricating a salient pole electronically commutated motor
05/1989
05/24/1989CN2038298U Permanent-magnet d.c. motor without brush
05/23/1989US4833355 Motor with armature teeth and field magnet
05/23/1989CA1254608A1 D. c. motor
05/17/1989EP0315717A1 Generation of a rotary magnetic field of AC motor by rectification of the multi-phase power supply
05/10/1989EP0314787A1 Two-phase rectifier electric motor
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