Stator cooling assembly

• US 5,731,643 A
• Filed: 05/02/1996
• Issued: 03/24/1998
• Est. Priority Date: 05/02/1996
• Status: Expired due to Term

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Chrysler Corporation (Stellantis NV)
• Inventors: Avakian, Kevin M., Colello, Gary M., Bushko, Dariusz A., Oleksy, John R.
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): WILLIAMS, TIMOTHY A J
• Application Number:
  US08/642,165
• Time in Patent Office: 691 Days
• Field of Search: 310/52, 310/54, 310/58, 310/64, 310/53, 310/65, 310/113, 318/146
• US Class Current: 310/53
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/12 Induction machines
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• CPC Class Codes: B60Y 2200/114 Racing vehicles, e.g. Formula one, Karts
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 9/197 in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y10S 903/906 Motor or generator
• CPC Class Codes: Y10S 903/96 having chargeable mechanical accumulator

Abstract

An induction motor includes a stator defining stator inner and outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and circumferentially between the stator inner diameter and the stator outer diameter and passing an electric current therethrough to create a magnetic field, a rotor extending along the longitudinal axis having a rotor outer diameter less than the stator inner diameter, the rotor rotates about the longitudinal axis relative to the stator in response to the magnetic field, and a stator thermal exchanging fluid circuit extending both through and about the stator whereby the stator thermal exchanging circuit exchanges thermal energy with the stator.

Claims

1. An induction motor comprising:

a stator defining stator inner and outer diameters extending about a longitudinal axis, said stator including a plurality of windings extending longitudinally along the longitudinal axis and circumferentially between said stator inner diameter and said stator outer diameter and passing an electric current therethrough to create a magnetic field, said windings having end turns extending around said stator inner diameter on each end of said stator;

a rotor extending along the longitudinal axis having a rotor outer diameter less than said stator inner diameter, said rotor being rotatable about the longitudinal axis relative to said stator in response to the magnetic field; and

a stator thermal exchanging fluid circuit extending both through and about said stator along the longitudinal axis, said stator thermal exchanging fluid circuit having a plurality of first conduits extending around said stator inner diameter adjacent said windings and a plurality of second conduits wrapped circumferentially around each end of said stator within said end turns, whereby said stator thermal exchanging fluid circuit exchanges energy with said stator.

2. An induction motor as set forth in claim 1 wherein said stator thermal exchanging fluid circuit includes an inlet port and an outlet port, said inlet port receiving fluid therein and said outlet port transferring the fluid out of said stator thermal exchanging fluid circuit.

3. An induction motor as set forth in claim 2 wherein said stator thermal exchanging fluid circuit further includes at least one conduit extending through said plurality of windings between said stator inner diameter and said stator outer diameter to connect said inlet port with said outlet port.

4. An induction motor as set forth in claim 2 wherein said stator thermal exchanging fluid circuit includes a channel extending between said inlet port and said outlet port along said stator, said channel disposed adjacent to said stator outer diameter outside thereof.

5. An induction motor as set forth in claim 4 wherein said channel includes a channel upper surface and a channel lower surface.

6. An induction motor as set forth in claim 5 wherein said channel further includes at least one inner channel side surface extending between said channel upper surface and said channel lower surface.

7. An induction motor comprising:

a stator defining stator inner and outer diameters extending about a longitudinal axis, said stator including a plurality of windings extending longitudinally and circumferentially between said stator inner diameter and said stator outer diameter and passing an electric current therethrough to create a magnetic field;

a rotor extending along the longitudinal axis having a rotor outer diameter less than said stator inner diameter, said rotor being rotatable about the longitudinal axis relative to said stator in response to the magnetic field; and

a stator thermal exchanging fluid circuit extending both through and about said stator, whereby said stator thermal exchanging fluid circuit exchanges thermal energy with said stator;

said stator thermal exchanging fluid circuit including an inlet port and an outlet port, said inlet port receiving fluid therein and said outlet port transferring the fluid out of said stator thermal exchanging fluid circuit;

said stator thermal exchanging fluid circuit including a channel extending between said inlet port and said outlet port along said stator, said channel disposed adjacent to said stator outer diameter outside thereof;

said channel including a channel upper surface and a channel lower surface and at least one inner channel side surface extending between said channel upper surface and said channel lower surface; and

wherein said at least one inner channel side surface is a helical single surface wrapping around said stator to create a single channel extending around said stator along a portion of said stator outer diameter.

8. A motor vehicle comprising:

a chassis;

at least two wheels connected to said chassis to move said chassis;

an induction motor operatively connected to at least one of said two wheels to create a force to move said at least one of said two wheels, said induction motor including a stator defining stator inner and outer diameters extending about and along a longitudinal axis, said stator including a plurality of windings extending longitudinally along the longitudinal axis and circumferentially between said stator inner diameter and said stator outer diameter and passing an electric current therethrough to create a magnetic field, said windings having end turns extending around said stator inner diameter on each end of said stator;

a rotor extending along the longitudinal axis having a rotor outer diameter less than said stator inner diameter, said rotor being rotatable about the longitudinal axis relative to said stator in response to the magnetic field; and

a stator thermal exchanging fluid circuit extending both through and about said stator along the longitudinal axis, said stator thermal exchanging fluid circuit having a plurality of first conduits extending around said stator inner diameter adjacent said windings and a plurality of second conduits wrapped circumferentially around each end of said stator within said end turns, whereby said stator thermal exchanging fluid circuit exchanges thermal energy with said stator.

9. A motor vehicle as set forth in claim 8 wherein said stator thermal exchanging fluid circuit includes an inlet port and an outlet port, said inlet port receiving fluid therein and said outlet port transferring the fluid out of said stator thermal exchanging fluid circuit.

10. A motor vehicle as set forth in claim 9 wherein said stator thermal exchanging fluid circuit further includes at least one conduit extending through said plurality of windings between said stator inner diameter and said stator outer diameter to connect said inlet port with said outlet port.

11. A motor vehicle as set forth in claim 9 wherein said stator thermal exchanging fluid circuit includes a channel extending between said inlet port and said outlet port along said stator, said channel disposed adjacent to said stator outer diameter outside thereof.

12. A motor vehicle as set forth in claim 11 wherein said channel includes a channel upper surface and a channel lower surface.

13. A motor vehicle as set forth in claim 12 wherein said channel further includes at least one inner channel side surface extending between said channel upper surface and said channel lower surface.

14. A motor vehicle comprising:

a chassis;

at least two wheels connected to said chassis to move said chassis;

an induction motor operatively connected to at least one of said two wheels to create a force to move said at least one of said two wheels, said induction motor including a stator defining stator inner and outer diameters extending about a longitudinal axis, said stator including a plurality of windings extending longitudinally and circumferentially between said stator inner diameter and said stator outer diameter and passing an electric current therethrough to create a magnetic field;

a rotor extending along the longitudinal axis having a rotor outer diameter less than said stator inner diameter, said rotor being rotatable about the longitudinal axis relative to said stator in response to the magnetic field;

a stator thermal exchanging fluid circuit extending both through and about said stator, whereby said stator thermal exchanging fluid circuit exchanges thermal energy with said stator;

said stator thermal exchanging fluid circuit including an inlet port and an outlet port, said inlet port receiving fluid therein and said outlet port transferring the fluid out of said stator thermal exchanging fluid circuit;

said stator thermal exchanging fluid circuit including a channel extending between said inlet port and said outlet port along said stator, said channel disposed adjacent to said stator outer diameter outside thereof;

said channel including a channel upper surface and a channel lower surface and at least one inner channel side surface extending between said channel upper surface and said channel lower surface; and

wherein said at least one inner channel side surface is a helical single surface wrapping around said stator to create a single channel extending around said stator along a portion of said stator outer diameter.