Stator cooling

• US 6,069,424 A
• Filed: 11/13/1997
• Issued: 05/30/2000
• 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: Colello, Gary M., Oleksy, John R.
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): Waks, Joseph
• Application Number:
  US08/970,063
• Time in Patent Office: 929 Days
• Field of Search: 310/74, 310/64, 310/58, 310/59, 310/180, 310/54
• US Class Current: 310/58
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• CPC Class Codes: H02K 3/47 Air-gap windings, i.e. iron-free windings
• CPC Class Codes: H02K 7/025 for power storage
• CPC Class Codes: 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
• 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: Y02E 60/16 Mechanical energy storage, e.g. flywheels or pressurised fluids
• 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

Abstract

The present invention is an energy storage apparatus having a rotor and a stator. The stator includes a bobbin having a cylindrical shape and open at each end. The bobbin includes at least one fin extending longitudinally on an exterior surface of the bobbin. The bobbin also includes a phase winding longitudinally and circumferentially encircling said bobbin. The winding is separated by at least one fin. The bobbin also includes at least one cooling passage for transporting a cooling medium.

Claims

1. An energy storage apparatus comprising:

a rotor;

a stator;

said stator including a bobbin having a cylindrical shape and open at each end;

at least one fin extending longitudinally on an exterior surface of said bobbin;

at least one cooling slot adjacent said fin;

a phase winding longitudinally and circumferentially encircling said bobbin;

said winding including an end turn at an end of said bobbin;

said at least one fin separating said winding; and

at least one cooling passage extending circumferentially through said end turn for transporting a cooling fluid therethrough to cool said winding.

2. The energy storage apparatus of claim 1 wherein:

said fin, said cooling slot, and said cooling passage dissipates rising heat in the stator.

3. The energy storage apparatus of claim 1 wherein:

said bobbin is constructed from an ironless, thermally conductive and non-electrically conductive material.

4. The energy storage apparatus of claim 1 wherein:

the winding is conductive.

5. An energy storage apparatus comprising:

a rotor;

a stator;

said stator including a bobbin having a cylindrical shape and open at each end;

a plurality of fins extending longitudinally on an exterior surface of said bobbin;

a preformed phase winding longitudinally and circumferentially encircling said bobbin, wherein said fins separate said winding;

said winding including an end turn at an end of said bobbin;

a plurality of cooling passages extending circumferentially through said end turn for transporting a cooling fluid therethrough;

a cooling slot longitudinally extending therebetween each one of said fins; and

each one of said fins, said cooling slot and said cooling passage dissipating rising heat in said stator.

6. The energy storage apparatus of claim 5 wherein:

said bobbin is constructed from an ironless, thermally conductive and non-electrically conductive material.

7. The energy storage apparatus of claim 5 wherein:

the winding is conductive.