Engine cooling system and motor therefore

• US 8,242,655 B2
• Filed: 09/18/2009
• Issued: 08/14/2012
• Est. Priority Date: 09/19/2008
• Status: Expired due to Fees

• Current Assignee: Johnson Electric SA (Johnson Electric Holdings Limited)
• Original Assignee: Johnson Electric SA (Johnson Electric Holdings Limited)
• Inventors: Qin, Rui Feng, Jing, Yi, Guan, Xin Hui, Arucci, Gianpaolo
• Primary Examiner(s): Leung, Quyen
• Assistant Examiner(s): DESAI, NAISHADH N
• Application Number:
  US12/562,894
• Publication Number:
  US 20100072851A1
• Time in Patent Office: 1,061 Days
• Field of Search: 310/158, 310/233, 123/41.49, 123/41.65, 123/41.12, 417/423.7
• US Class Current: 310/158
• CPC Class Codes: F01P 2005/046 with electrical pump drive
• CPC Class Codes: H02K 13/04 Connections between commutator segments and windings
• CPC Class Codes: H02K 23/26 characterised by the armature windings
• CPC Class Codes: H02K 3/02 Windings characterised by the conductor material

Abstract

An engine cooling system, comprising a fan unit, cooling pipes and a coolant tank, the coolant tank, the cooling pipes and cooling channels of the engine being connected together and forming a cooling cycle, the fan unit being used to cool the cooling pipes and the coolant therein; wherein the fan unit comprises a motor and fan blades driven by the motor, the motor comprising a stator and a rotor rotatable mounted confronting the stator; the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator; the windings being wound by aluminum cored wire that has a electrical insulation film around its peripheral surface.

Claims

1. An engine cooling system, comprising a fan unit, cooling pipes, cooling channels in the engine and a coolant tank, the coolant tank, the cooling pipes and the cooling channels in the engine being connected together and forming a cooling circuit, the fan unit being used to cool the cooling pipes and coolant therein, the fan unit comprising a motor and fan blades driven by the motor;

wherein the motor comprises a stator and a rotor rotatable mounted confronting the stator;

the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator;

the windings being formed from aluminum cored wire that has an electrical insulation film around its peripheral surface, each of the segments comprising a hook formed at one end thereof, a protective film encapsulating the hook and lead wire of the windings after the lead wire and the hook are soldered together for preventing the soldered hook and lead wire from being corroded by oxygen and/or moisture.

2. The engine cooling system of claim 1, wherein, the hook has a tin coating to electrically connect to the lead wires of the windings, wherein the tin coating enables the lead wire to be easily soldered to the hook and create a reliable electrical connection.

3. The engine cooling system of claim 2, wherein the surface of the hook is concave inwardly in a radial direction of the commutator relative to the contacting surface of the corresponding segment and forms an increased space for accommodating the lead wire of the windings, the hook having a reduction in thickness at a portion corresponding to the increased space.

4. The engine cooling system of claim 1, wherein the windings comprise a plurality of coils, each of the coils being wound about one tooth of the rotor core.

5. The engine cooling system of claim 1, wherein the windings comprise a plurality of coils, each of the coils being wound about two or more teeth of the rotor core.

6. A cooling fan used in an engine cooling system, the cooling fan comprising a motor, fan blades driven by the motor to cool an engine, wherein the motor comprises a stator and a rotor rotatable mounted confronting the stator;

the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator;

the windings being formed from aluminum cored wire that has an electrical insulation film around its peripheral surface, wherein each of the hooks at a position adjoining a corresponding segment is concave inwardly along a radial direction of the commutator relative to a contacting surface of the corresponding segment to thereby form an increased space for accommodating lead wire of the windings.

7. The motor of claim 6, wherein each of the segments comprises a hook at one end, the hook having tin coating to electrically connect to the lead wires of the windings.

8. The motor of claim 7, wherein each lead wire of the windings is soldered to a corresponding hook.

9. The motor of claim 7, wherein the lead wires and hooks are encapsulated by a protective film after the lead wires and the hooks are soldered together, for preventing the soldered hooks and lead wires of the windings from being corroded by oxygen and/or moisture.

10. The motor of claim 6, wherein the aluminum cored wire is copper clad aluminum wire.

11. A motor used in an engine cooling system comprising fan blades driven by the motor to cool an engine, wherein the motor comprises a stator and a rotor rotatably mounted confronting the stator;

the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator, the windings being formed from copper clad aluminum wire, wherein each of the segments comprises a hook formed at one end thereof, each of the hooks at a position adjoining the corresponding segment is concave inwardly along a radial direction of the commutator relative to a contacting surface of the corresponding segment to thereby form an increased space for accommodating a lead wire of the windings, protective films respectively encapsulating the lead wires and hooks after the lead wires and hooks are soldered together for preventing the soldered hooks and lead wires of the windings from being corroded by oxygen and/or moisture.

12. A motor used in an engine cooling system comprising a fan driven by the motor to cool an engine, wherein the motor comprises a stator and a rotor rotatably mounted confronting the stator;

the rotor comprising a shaft, a commutator fitted to the shaft, a rotor core fitted to the shaft adjacent to the commutator, windings wound about teeth of the rotor core and electrically connected to segments of the commutator, the windings being formed from copper clad aluminum wire, wherein each of the segments comprises a hook formed at one end thereof, each of the hooks having a portion with a reduced thickness forming a concave providing an increased space for accommodating a lead wire of the windings.