| Patents for H02K 21 - Synchronous motors having permanent magnet; Synchronous generators having permanent magnet (17,141) |
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| 05/01/1990 | US4922152 Synchronous machine rotor lamination |
| 04/26/1990 | DE3834649A1 Tacho generator for motor vehicle use |
| 04/24/1990 | US4920295 Alternator |
| 04/24/1990 | US4920294 Synchronous or stepping motor with simplified tooth alignment |
| 04/18/1990 | EP0363405A1 Multiphase synchronous-design electric machine energized by permanent magnets. |
| 04/11/1990 | EP0363264A1 Synchronous motor whose sense of rotation can be selected |
| 04/11/1990 | EP0201486B1 Induction motor |
| 04/10/1990 | US4916343 Multi-pickup sensor bracket for magneto |
| 04/10/1990 | US4915068 Internal combustion engine with integral stator and regulator |
| 04/05/1990 | WO1990003686A1 Brushless motor |
| 04/05/1990 | WO1990003514A1 Arrangement for generator windings, especially in ignition systems |
| 04/04/1990 | EP0361925A2 Electromechanical machines |
| 04/04/1990 | EP0361775A2 Improvements in or relating to machine drives and/or methods of making the same |
| 04/04/1990 | EP0163747B1 Rotor for synchronous electric motor |
| 03/22/1990 | WO1990003031A1 Recording/reproducing apparatus |
| 03/21/1990 | EP0358806A1 Self-starting single-phase synchronous motor |
| 03/21/1990 | EP0358805A1 Self-starting single-phase synchronous motor |
| 03/13/1990 | US4908540 Electric generator for vehicles |
| 03/08/1990 | WO1990002437A1 An electric motor |
| 03/07/1990 | EP0357422A2 Electric motor rotator for christmas tree ornaments |
| 03/07/1990 | EP0357317A1 Electric motor |
| 03/07/1990 | CN1007109B D.c. permanent-magnet motor |
| 03/06/1990 | US4906882 Rotor for an electric motor energized by permanent magnet means |
| 02/28/1990 | EP0356368A1 D.C. motor |
| 02/28/1990 | EP0355263A2 Motor, in particular for driving a time piece |
| 02/28/1990 | CN2053817U Sublow-speed electric generator |
| 02/27/1990 | US4905110 Disk drive spindle motor |
| 02/27/1990 | CA1266294A1 Low profile electric motor having an inner stator, an annular rotor and an outer stator |
| 02/20/1990 | US4902923 Motor having frequency generator |
| 02/15/1990 | DE3827450A1 Low-vibration configuration of transverse-flux machines |
| 02/14/1990 | EP0354328A2 Axial field motor |
| 02/13/1990 | US4900965 Lightweight high power electromotive device |
| 02/13/1990 | US4900958 Drive motor for magnetic disks, optical disks, and magneto-optical disks |
| 02/06/1990 | US4899075 Two-phase DC brushless motor |
| 01/31/1990 | EP0353042A1 Axial field electrical generator |
| 01/31/1990 | EP0352573A1 Synchronous machine rotor lamination |
| 01/31/1990 | CN2052163U Permanent-magnet brushless generator for vehicle |
| 01/25/1990 | DE3922794A1 Synchronous motor |
| 01/24/1990 | EP0352214A2 D.C. motor |
| 01/16/1990 | US4894738 Disk storage drive |
| 01/09/1990 | US4893038 Device for limiting direction of rotation of synchronous motor |
| 01/09/1990 | US4892079 Magnetogenerator |
| 01/03/1990 | EP0349056A1 Electric multipolar machine |
| 01/03/1990 | EP0349055A1 Electrical multi-pole machine |
| 01/03/1990 | EP0348470A1 Starting system and method using a hybrid permanent magnet/induction machine |
| 01/02/1990 | US4891567 Brushless DC motor having an outer rotor |
| 01/02/1990 | US4891538 Synchronous motor with sinusodial torque variation in each phase |
| 12/28/1989 | WO1989012925A1 Tacho generator |
| 12/28/1989 | WO1989011148A3 Tape drive machines |
| 12/27/1989 | EP0347722A1 Tachometer generator |
| 12/19/1989 | US4888512 Surface multipolar rare earth-iron-boron rotor magnet and method of making |
| 12/14/1989 | WO1989012347A1 Electric motor with iron-cored disk armature |
| 12/14/1989 | WO1989012346A1 Two-phase or multiphase synchronous electric motor with disk-shaped rotor |
| 12/14/1989 | DE3908313A1 Commutatorless permanent-magnet DC motor |
| 12/05/1989 | US4885493 Output voltage control apparatus of a permanent magnet alternator |
| 12/05/1989 | US4885489 Permanent magnet motor with hysteresis drag cup coupling |
| 12/05/1989 | US4885488 Miniaturized fan for printed circuit boards |
| 11/30/1989 | WO1989011751A1 Electric machine |
| 11/29/1989 | EP0343457A2 Electric heteropolar machine rotor that ist premagnetizable by am homopolar magnetic field |
| 11/29/1989 | CN2048641U Permanent magnetic ac generator for tractor |
| 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 |
| 11/22/1989 | CN2048255U Bicycle's dynamo |
| 11/21/1989 | US4882515 Alternating current generator |
| 11/21/1989 | US4882513 Dual permanent magnet generator |
| 11/21/1989 | US4882511 Brushless three-phase D.C. motor |
| 11/16/1989 | WO1989011148A2 Tape drive machines |
| 11/15/1989 | EP0341867A1 Pulse motor |
| 11/15/1989 | EP0341630A2 Permanent magnet type synchronous motor |
| 11/15/1989 | CN2047857U Voltage-regulating magnetoelectric generator |
| 11/14/1989 | US4881093 Electromagnetic shutter apparatus |
| 11/07/1989 | US4879486 Permanent-magnet generator used for an ignition device of an internal combustion engine |
| 11/07/1989 | US4879484 Alternating current generator and method of angularly adjusting the relative positions of rotors thereof |
| 11/02/1989 | WO1989010653A1 Synchronous motor |
| 11/02/1989 | WO1989010580A1 Electromagnetic shutter apparatus |
| 11/02/1989 | EP0339765A2 Disk drive spindle motor |
| 11/02/1989 | EP0339367A2 Electric motor |
| 10/25/1989 | CN2046690U Permanent-magnet a.c. micro-hydroelectric generator set |
| 10/19/1989 | DE3810159A1 Single-phase synchronous motor |
| 10/18/1989 | CN2046289U Directional start single phase permanent-magnet synchronous motor |
| 10/17/1989 | US4874977 Stator assembly having coil bobbins with retaining clips |
| 10/17/1989 | US4873962 High efficiency electrical alternator system |
| 10/12/1989 | DE3810158A1 Single-phase synchronous motor |
| 10/10/1989 | US4873462 Stepping motor with low detent torque |
| 10/04/1989 | EP0335287A2 Permanent magnet motor with hysteresis drag cup coupling |
| 10/03/1989 | CA1262168A1 External magnet flywheel mounting |
| 09/26/1989 | US4868970 Method of making an electric motor |
| 09/26/1989 | CA1261916A1 Hybrid generating system |
| 09/26/1989 | CA1260444A1 Lighting apparatus for wheels of vehicles |
| 09/20/1989 | EP0156819B1 Rotor for a permanent magnet generator |
| 09/20/1989 | CN2044773U Rotor for permanent-magnet excited motor |
| 09/19/1989 | US4868443 Tachogenerator for electric machines |
| 09/12/1989 | US4866324 Brushless motor |
| 09/12/1989 | US4866323 Synchronous electric motor with magnetised rotor and method of manufacturing this motor |
| 09/12/1989 | US4866321 Brushless electrical machine for use as motor or generator |
| 09/08/1989 | WO1989008346A1 Electric machine |
| 09/06/1989 | EP0331180A1 Electric machine |
| 09/06/1989 | EP0330815A2 Protective case of tachometer generator |
| 09/05/1989 | US4864175 Rotor for an electric motor |