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| Number | Title | Issue Date |
| 7049726 | Stator for dynamo-electric machine The invention provides a stator for a dynamo-electric machine capable of preventing deterioration of efficiency. In the stator for dynamo-electric machine of which rotor is disposed inside the stator, a stator core 11 comprises: an inside ring core 9 f... | 05/23/2006 |
| 6597080 | Method of manufacturing a rotary electric machine and a rotary electric machine The invention relates to a process for producing a rotating electric DC machine, where the main pole of the machine and the slots formed in it for the compensating winding are formed or placed in such a way that the slots are moved radially outward from t... | 07/22/2003 |
| 6346756 | Motor rotation detection structure In a ripple voltage detection system of a rectified waveform, a motor rotation detection structure is provided to increase ripple voltage by modifying number of windings, to bring cogging torque and number of parts to be equivalent, and to achieve automat... | 02/12/2002 |
| 6037693 | Commutator motor A commutator motor has at least two supply terminals; a metallic pole tube, and an interference suppressing device, the pole tube being formed as a part of the interference suppressing device.... | 03/14/2000 |
| 5949174 | Commutator for two speed electric motor and motor incorporating same A commutator is disclosed which is adapted to be mounted on a rotor shaft of an electric motor for cooperation with electrical contacts of the motor, the commutator being capable of accommodating two speeds of the motor. The commutator includes a support ... | 09/07/1999 |
| 5015905 | DC dynamoelectric machine with interpoles having magnetic flux bypassing members A DC dynamoelectric machine with interpoles between field poles operable in sparkles even under heavy operating conditions comprising a solid soft iron magnetic flux bypassing members, each disposed between respective field poles and interpoles at their e... | 05/14/1991 |
| 4435664 | Magnetic interpole apparatus for improving commutation characteristics of a dynamoelectric machine An interpole for a direct current dynamoelectric machine is provided at the tip thereof with a flux shift winding, or windings, to effect a shifted magnetic flux strength to counteract induced voltages of the commutated armature coils moving through the c... | 03/06/1984 |
| 4338535 | Direct current motor having E-shaped interpoles A direct current motor used, for example, in a machine tool, comprising an armature, a plurality of main magnetic poles disposed around the armature having field windings wound thereon, and a plurality of E-shaped interpoles disposed at the intermediate p... | 07/06/1982 |
| 4311933 | Brushless direct current motor A brushless D.C. motor has electrical power switched between the phase windings by means of a circuit which includes a plurality of hall effect switches. The hall effect switches are operated by a plurality of arcuate commutating magnets which are radiall... | 01/19/1982 |
| 4307312 | Direct current motor having E-shaped interpoles A direct current motor used, for example, in a machine tool, comprising an armature, n main magnetic poles disposed around the armature, each of the main magnetic poles consisting of a pole core on which a field winding is provided and a pole piece extend... | 12/22/1981 |
| 4307310 | Segmented magnet dynamoelectric machine with series connected rotor conductors A dynamoelectric machine, of the direct current type, with a circumferentially segmented stationary magnetic field structure providing magnetic poles including diametrically opposed pairs of north and south poles, with intervening poles of alternating pol... | 12/22/1981 |
| 4270065 | Four pole wave wound direct current machine with multi-turn armature coils This invention relates to an improved armature for a four pole wave wound direct current machine and also to a method for winding the armature for such a machine. A plural turn winding is free formed or wound in place to substantially a final shape with t... | 05/26/1981 |
| 4220882 | Direct current motor A direct current motor having interpoles mounted therein. The motor comprises a circular-shaped yoke, two main magnetic poles equidistantly disposed inside of the yoke and with their polarities different from each other, an armature, having armature windi... | 09/02/1980 |
| 4140935 | D-C dynamo electric machine To improve commutation and, particularly, to suppress commutator sparking and arc-over or flash-over, an auxiliary yoke is placed between the main poles and the auxiliary or commutating poles of a salient pole machine, the auxiliary yoke being formed of s... | 02/20/1979 |
| 4011479 | Stator construction for a permanent magnet-excited d-c machine A permanent magnet-excited d-c machine including a stator, a plurality of flux-conducting pieces disposed in the stator, and a plurality of tangentially magnetized permanent magnets disposed in the stator between each of the flux-conducting pieces. Compen... | 03/08/1977 |
