# US 2014/0197716 A1 · Rotating electric machine and power transmission device (as amended)

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- Number: US 2014/0197716 A1
- Document ID: US20140197716A1
- Status: Published application
- Kind: A1
- Application number: 14/240,103
- Filed: 2012-08-06
- Published: 2014-07-17
- Earliest claimed: 2011-09-13
- Assignees: Toyota Jidosha Kabushiki Kaisha; Kabushiki Kaisha Toyota Chuo Kenkyusho; Aisin Seiki Kabushiki Kaisha
- Inventors: Takahiro Shiina; Akira Murakami; Tadashi Fujiyoshi; Yasumitsu Osada; Takao Watanabe; Shu Asami; Eiji Tsuchiya; Tomoyuki Tohyama
- Web page: https://patentgrep.com/patent/US20140197716A1

## CPC

- H02K 16/02: Machines with one stator and two {or more} rotors
- B60L 50/16: with provision for separate direct mechanical propulsion
- H02K 13/003: {Structural associations of slip-rings}
- H02K 51/00: Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
- H02K 99/00: Subject matter not provided for in other groups of this subclass
- B60L 2220/52: Clutch motors
- B60L 2240/486: Operating parameters
- B60L 2240/507: Operating parameters
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Provided is a compound motor (14) comprising a magnet rotor (19) supported by bearings (B3, B4) in a rotatable manner, a winding rotor (20) supported by bearings (B5, B6) in a rotatable manner relative to the magnet rotor (19) at the inner side of the magnet rotor (19) and having rotor winding units (20b), and slip ring mechanisms (25). A space is formed in the inner circumference of the winding rotor (20). At least a part of the slip ring mechanisms (25) is arranged in the space of the inner circumference of the winding rotor (20). The bearings (B3 to B6) include bearings (B3, B6), the internal diameter of each is larger than the size of slip ring mechanisms (25) with respect to the radial direction. The bearings (B3, B6) are arranged outside the slip ring mechanisms (25) with respect to the radial direction.

## Claims

### Claim 1

A rotating electric machine comprising:
a first rotor being supported by a plurality of bearings in a rotatable manner around an axis, the first rotor having an inner circumference in which a space is formed;
a second rotor being supported by a plurality of bearings in a rotatable manner relative to the first rotor while being arranged coaxially with the first rotor in the space of the inner circumference of the first rotor, the second rotor having coils;
an electric power transmission unit having at least one rotating member which rotates integrally with the second rotor by being connected electrically with the coils, the electric power transmission unit connecting a predetermined connection object fixed in an unrotatable manner and the coils, wherein
a space is formed in an inner circumference of the second rotor,
at least a part of the power transmission unit is arranged in the space of the inner circumference of the second rotor,
both of the plurality of bearings supporting the first rotor and the plurality of bearings supporting the second rotor include a large diameter bearing having an internal diameter which is larger than size of the power transmission unit with respect to a radial direction, and
the large diameter bearing supporting the second rotor permits the second rotor to rotate relative to the first rotor and is arranged outside the electric power transmission unit with respect to the radial direction.

### Claim 2 (depends on 1)

The rotating electric machine according to claim 1, wherein a whole of the electric power transmission unit is arranged in the space in the inner circumference of the second rotor.

### Claim 3 (depends on 2)

The rotating electric machine according to claim 2, further comprising a rotational speed detecting unit which is configured to detect rotational speed of the second rotor, wherein
size of the rotational speed detecting unit with respect to a radial direction is set so as to be equal to size of the electric power transmission unit with respect to a radial direction, and
at least a part of the rotational speed detecting device is arranged in the space in the inner circumference of the second rotor.

### Claim 4 (depends on 1)

The rotating electric machine according to claim 1, wherein
a part of the electric power transmission unit is arranged in the space of the inner circumference of the second rotor, and a remaining part of the electric power transmission unit is arranged outside the space of the inner circumference of the second rotor.

### Claim 5 (depends on 4)

The rotating electric machine according to claim 4, wherein
the rotational speed detecting unit configured to detect the rotational speed of the second rotor is provided so as to be aligned with the electric power transmission unit with respect to an axial direction, outside the space of the inner circumference of the second rotor, and
the electric power transmission unit has a cable member: extending in the axial direction from a part where the cable member is arranged in the space of the inner circumference of the second rotor until an outside of the second rotor; and having a direction extending outside with respect to the radial direction which is changed before reaching the rotational speed detecting unit.

### Claim 6 (depends on 1)

The rotating electric machine according to claim 1, further comprising
a seal member for separating between the space where the second rotor is arranged and the space where the electric power transmission unit is arranged, wherein
the seal member is: formed so that an external diameter of the seal member is smaller than an internal diameter of the second rotor and an internal diameter of the seal member is larger than the size of the electric power transmission unit with respect to the radial direction; and arranged outside the electric power transmission unit with respect to the radial direction.

### Claim 7 (depends on 1)

The rotating electric machine according to claim 1, wherein
an insulating member is provided between the second rotor and the electric power transmission unit.

### Claim 8 (depends on 1)

A power transmission device comprising the rotating electric machine according to claim 1, wherein
one of the first rotor and the second rotor is connected with a power source, and
the other one of the first rotor and the second rotor is connected with a drive object which is driven by the drive source.