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