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US 6,285,109 B1Granted
Small motor with improved connecting structure between coil, riser and varistor
AssigneeKabushiki Kaisha Sankyo Seiki Seisakusho
InventorsMasayuki Katagiri, Hiromitsu Takei
Life of this patent
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Abstract
When winding an armature coil start S of a winding is entwined around a riser R1, the wire is wound via a riser R4 around a salient pole P1 adjacent to the riser R4 and an opposed salient pole P2 to the salient pole P1 in order and leads from a riser R3 through an opposed riser R6 to an adjacent salient pole P3 and an opposed salient pole P4. Next, it is passed to a riser R5 and is wound around an opposed riser R2, an adjacent salient pole P5, and a salient pole P6, then ends with the riser R4. A varistor 18 is inserted and three electrodes 19 are soldered to the corresponding risers R2, R4, and R6.
Claims4
A three-phase motor comprising:
- an armature having six salient poles radially arranged and a three-phase coil wound around said salient poles;
- six risers connected to said three-phase coil;
- six commutators being joined to said risers in a one-to-one correspondence;
- a ring varistor being connected to some of said risers for suppressing overvoltage;
- a brush coming in sliding contact with said commutators for supplying a current;
- and
- a permanent magnet having four magnetic poles, placed facing said salient poles;
- wherein said ring varistor is provided with three electrode parts to which alternate three of said six risers are connected, wherein each of same phrase portions of said three-phase coil has windings wound on a pair of said risers, one of said pair of risers being connected to one of said three electrode parts, wherein said pair of risers are arranged symmetrically with respect to a rotation axis of said armature, and
- wherein one of said same phase portions is connected to said riser connected to said electrode part, wherein said same phase portion is also wound on a pair of salient poles one of said pair of salient poles being adjacent in a circumferential direction to said riser connected to said electrode part, and wherein said pair of salient poles is arranged symmetrically with respect to said rotation axis.
6 more elements
A three-phase motor comprising:
- an armature having six salient poles radially arranged and a three-phase coil wound around said salient poles;
- six risers connected to said three-phase coil;
- six commutators being joined to said risers in a one-to-one correspondence;
- a ring varistor being connected to some of said risers for suppressing overvoltage;
- a brush coming in sliding contact with said commutators for supplying a current;
- and
- a permanent magnet having four magnetic poles, placed facing said salient poles;
- wherein said ring varistor is provided with three electrode parts to which alternate three of said six risers are connected, wherein each of same phrase portions of said three-phase coil has windings wound on a pair of said risers, one of said pair of risers being connected to one of said three electrode parts, wherein said pair of risers are arranged symmetrically with respect to a rotation axis of said armature, and
- wherein said ring varistor has three electrodes which are insulated from each other at one of an outer circumference surface and one of end surfaces.
6 more elements
A three-phase motor comprising:
- an armature having six salient poles radially arranged and a three-phase coil wound around said salient poles;
- six risers connected to said three-phase coil;
- six commutators being joined to said risers in a one-to-one correspondence;
- a ring varistor being connected to some of said risers for suppressing overvoltage;
- a brush coming in sliding contact with said commutators for supplying a current;
- and
- a permanent magnet having four magnetic poles, placed facing said salient poles;
- wherein said ring varistor is provided with three electrode parts to which alternate three of said six risers are connected, wherein each of same phrase portions of said three-phase coil has windings wound on a pair of said risers, one of said pair of risers being connected to one of said three electrode parts, wherein said pair of risers are arranged symmetrically with respect to a rotation axis of said armature, and
- wherein each of said risers has a projecting portion which protrudes outwardly beyond an outer circumference surface of said ring varistor, and said projecting portion is connected to said coil.
6 more elements
Dependencies are inferred from the claim text.