# US 2013/0154408 A1 · Generator motor cooling structure and generator motor

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- Number: US 2013/0154408 A1
- Document ID: US20130154408A1
- Status: Published application
- Kind: A1
- Application number: 13/818,427
- Filed: 2012-03-26
- Published: 2013-06-20
- Earliest claimed: 2011-03-31
- Assignees: Komatsu Ltd.
- Inventors: Norihiko Satou; Yukihiko Sugimoto
- Web page: https://patentgrep.com/patent/US20130154408A1

## CPC

- H02K 9/00: Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24)
- B60L 3/0061: {relating to electrical machines}
- B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60L 50/30: using propulsion power stored mechanically, e.g. in fly-wheels
- B60L 50/40: using propulsion power supplied by capacitors
- B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- H02K 5/203: {specially adapted for liquids, e.g. cooling jackets}
- H02K 7/086: {radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K7/09 takes precedence)}
- H02K 9/19: for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- B60L 2200/40: Working vehicles
- B60L 2210/40: DC to AC converters
- B60L 2220/50: Structural details of electrical machines
- B60L 2240/36: Temperature of vehicle components or parts
- B60L 2260/26: Transition between different drive modes
- B60L 2270/145: Structure borne vibrations
- H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06)
- H02K 7/18: Structural association of electric generators with mechanical driving motors, e.g. with turbines
- Y02T 10/62: Hybrid vehicles
- 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
- Y02T 10/72: Electric energy management in electromobility
- 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

A generator motor cooling structure for cooling a generator motor, which includes a housing storing an input/output shaft to which a rotor is attached and a stator disposed at an outer periphery portion of the rotor, by a cooling medium, includes: a protrusion portion that protrudes toward the rotor from a surface at a side of the housing of an end side member disposed at one end portion of the housing in a direction of a central rotation axis of the input/output shaft, wherein the protrusion portion is provided on an inner side of a coil of the stator in a radial direction, on an outer side of a bearing attached to the input/output shaft in the radial direction, in at least a partial region on a periphery of the central rotation axis.

## Claims

### Claim 1

A generator motor cooling structure for cooling a generator motor, which includes a housing storing an input/output shaft to which a rotor is attached and a stator disposed at an outer periphery portion of the rotor, by a cooling medium, comprising:
a protrusion portion that protrudes toward the rotor from a surface at a side of the housing of an end side member disposed at one end portion of the housing in a direction of a central rotation axis of the input/output shaft;
an annular-shaped blade that is provided at an end portion of the rotor in the direction of the central rotation axis;
a cooling medium holding portion that is provided at an outer periphery portion of the blade, is opened to an inner side of the blade in the radial direction, and holds the cooling medium cooling the generator motor; and
a cooling medium outflow hole that is provided at the blade and passes the cooling medium held by the cooling medium holding portion to an outer side in the radial direction,
wherein the protrusion portion is provided on an inner side of a coil of the stator in a radial direction, on an outer side of a bearing attached to the input/output shaft in the radial direction, in at least a partial region on a periphery of the central rotation axis, and is disposed at an inner side in the radial direction than the opening of the cooling medium holding portion.

### Claim 2

(canceled)

### Claim 3 (depends on 1)

The generator motor cooling structure according to claim 1, wherein an end portion of the protrusion portion in the direction of the central rotation axis is located at a side of the opening of the cooling medium holding portion than an end portion of a side of the protrusion portion of the cooling medium holding portion.

### Claim 4 (depends on 1)

The generator motor cooling structure according to claim 1, wherein the protrusion portion is provided on an entire periphery of the central rotation axis of the input/output shaft.

### Claim 5 (depends on 1)

A generator motor comprising the generator motor cooling structure according to claim 1.

### Claim 6 (depends on 5)

The generator motor according to claim 5, wherein an output shaft of a power generating source is connected to one end of the input/output shaft, and an input shaft of a target to be driven by power of the power generating source is connected to the other end of the input/output shaft.

### Claim 7

A generator motor cooling structure for cooling a generator motor, which includes a housing storing an input/output shaft to which a rotor is attached and a stator disposed at an outer periphery portion of the rotor, comprising:
a protrusion portion that protrudes toward the rotor from a surface at a side of the housing of an end side member disposed at one end portion of the housing in a direction of a central rotation axis of the input/output shaft, and is provided on an entire periphery of the central rotation axis of the input/output shaft;
annular-shaped blades that are provided at both end portions of the rotor in the direction of the central rotation axis;
a cooling medium holding portion that is provided at an outer periphery portion of each of the blades, is opened to an inner side of the blade in the radial direction, and holds a cooling medium cooling the generator motor; and
a cooling medium outflow hole that is provided at each of the blades and passes the cooling medium held by the cooling medium holding portion to an outer side in the radial direction,
wherein the protrusion portion is disposed at an inner side in the radial direction than the opening of the cooling medium holding portion, and an end portion of the protrusion portion in the direction of the central rotation axis overlaps with an end portion of the cooling medium holding portion in the direction of the central rotation axis.