Double-stator rotating electric machine
AssigneeDenso Corporation
InventorsTakeo Maekawa, Shin Kusase, Keiji Kondou
Life of this patent
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Abstract
A double-stator rotating electric machine includes a rotor, an outer stator disposed radially outside the rotor with an outer gap formed therebetween, and an inner stator disposed radially inside the rotor with an inner gap formed therebetween. The outer stator has an outer multi-phase coil wound thereon, and the inner stator has an inner multi-phase coil wound thereon. Moreover, the inner gap formed between the inner stator and the rotor is set to be larger than the outer gap formed between the outer stator and the rotor.
Claims22
A double-stator rotating electric machine comprising:
- a rotor;
- an outer stator disposed radially outside the rotor with an outer gap formed therebetween, the outer stator having an outer stator core and an outer multi-phase coil wound on the outer stator core;
- an inner stator disposed radially inside the rotor with an inner gap formed therebetween, the inner stator having an inner stator core and an inner multi-phase coil wound on the inner stator core;
- and
- a plurality of U-shaped conductors, wherein
- each of the U-shaped conductors consists of an outer coil part that constitutes a part of the outer multi-phase coil, an inner coil part that constitutes a part of the inner multi-phase coil, and a bridging part that bridges the outer coil part and the inner coil part,
- the inner stator core has a plurality of slots formed therein,
- the inner coil parts of a predetermined number of the U-shaped conductors are received in each of the slots of the inner stator core,
- at least one of the predetermined number of the U-shaped conductors has a twisted portion formed in the bridging part on the inner stator side,
- the twisted portion is twisted by an angle within a predetermined range including 90°, and
- the twisted portion is located to overlap the inner stator core in an axial direction of the rotor.
A double-stator rotating electric machine comprising:
- a rotor;
- an outer stator disposed radially outside the rotor with an outer gap formed therebetween, the outer stator having an outer stator core and an outer multi-phase coil wound on the outer stator core;
- an inner stator disposed radially inside the rotor with an inner gap formed therebetween, the inner stator having an inner stator core and an inner multi-phase coil wound on the inner stator core;
- and
- a plurality of U-shaped conductors, wherein
- each of the U-shaped conductors consists of an outer coil part that constitutes a part of the outer multi-phase coil, an inner coil part that constitutes a part of the inner multi-phase coil, and a bridging part that bridges the outer coil part and the inner coil part,
- the bridging part has a bent portion formed therein, the bent portion and a longitudinal axis of the bridging part being bent in a direction that is inclined in a direction of rotation of the rotor with respect to a radial direction of the rotor, and
- the bent portion is located to overlap neither the outer stator core nor the inner stator core in an axial direction of the rotor.
Dependencies are inferred from the claim text.