Motor stator connection method and apparatus

• US 6,600,247 B1
• Filed: 09/29/2000
• Issued: 07/29/2003
• Est. Priority Date: 09/29/2000
• Status: Expired due to Fees

• Current Assignee: Reliance Electric Technologies LLC (ABB Limited)
• Original Assignee: Reliance Electric Technologies LLC (ABB Limited)
• Inventors: Stimson, John
• Primary Examiner(s): Waks, Joseph
• Application Number:
  US09/676,203
• Time in Patent Office: 1,033 Days
• Field of Search: 310/89, 310/71, 310/88
• US Class Current: 310/89
• CPC Class Codes: H02K 5/136 explosion-proof
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A method and apparatus are disclosed for electrically connecting a power cable to an explosion-proof electric motor having an electric motor housed within an explosion-proof motor housing. The electric motor has a plurality of motor conductors used to couple power to the electric motor stator. The explosion-proof motor housing has an opening and a connection housing securable to the explosion-proof motor housing to seal the opening. The connection housing has an internal volume to house the slack portions of power cable and motor conductors and the electrical connection formed between the power cable and the motor conductors.

Claims

1. An explosion-proof motor assembly, comprising:

an electric motor having a plurality of motor conductors to couple power to the electric motor;

an explosion-proof motor housing, comprising;

an opening for accessing a power cable and the plurality of motor conductors; and

a connection housing securable to the explosion-proof motor housing to seal the opening, the connection housing having an internal volume to house the power cable, the plurality of motor conductors, and an electrical connection formed between the power cable and the plurality of motor conductors.

2. The explosion-proof motor assembly as recited in claim 1, wherein the explosion-proof motor housing is configured to form a seal around the power cable.

3. The explosion-proof motor assembly as recited in claim 1, wherein the explosion-proof motor housing comprises:

a central housing, wherein the electric motor is disposed; and

an end bracket secured to the central housing.

4. The explosion-proof motor assembly as recited in claim 3, wherein the connection housing is sealingly secured to the end bracket.

5. The explosion-proof motor assembly as recited in claim 4, wherein the end bracket comprises a rotor shaft opening.

6. The explosion-proof motor housing assembly as recited in claim 4, wherein the end bracket comprises a second opening adapted to receive the power cable.

7. The explosion-proof motor housing assembly as recited in claim 4, wherein the end bracket comprises a third opening adapted to receive the plurality of motor conductors.

8. The explosion-proof motor assembly as recited in claim 3, comprising an o-ring to form a seal between the connection housing and the end bracket.

9. The explosion-proof motor assembly as recited in claim 1, comprising a plurality of securing members for securing the connection housing to the explosion-proof motor housing.

10. The explosion-proof motor housing assembly as recited in claim 1, wherein the plurality of motor conductors comprises a plurality of conductors electrically coupled to a stator of the electric motor.

11. An explosion-proof motor, comprising:

a stator having a stator conductor electrically coupled to a stator winding;

an explosion-proof motor housing, comprising;

a first housing having the stator disposed therein; and

an end bracket securable to the first housing, comprising;

a first opening for receiving a power conductor;

a second opening for receiving the stator conductor; and

a third opening for routing the power cable and stator conductor; and

a second housing securable to the end bracket to seal the third opening, the second housing having an internal volume to house an electrical connection formed between the power conductor and stator conductor.

12. The explosion-proof motor as recited in claim 11, wherein the stator conductor and power conductor are cut to an initial length prior to forming an electrical connection between the power conductor and stator conductor.

13. The explosion-proof motor as recited in claim 11, comprising:

a sealing member disposed between the end bracket and the power conductor.

14. The explosion-proof motor as recited in claim 11, wherein the second housing is adapted to house excess portions of the motor conductor to prevent the motor conductor from engaging rotating equipment within the fist housing.

15. The explosion-proof motor as recited in claim 14, wherein the second housing is adapted to house excess portions of the power conductor to prevent the power conductor from engaging rotating equipment within the first housing.

16. The explosion-proof motor as recited in claim 11, wherein the second housing is adapted to extend through the third opening.

17. The explosion-proof motor as recited in claim 11, wherein the end bracket comprises a rotor shaft opening.

18. An explosion-proof electric motor, comprising:

a motor housing having an interior volume adapted to house a rotor and a stator;

an end cover sealingly securable to the motor housing and having an opening therein;

a second housing adapted to seal the opening in the end cover; and

an electrical conductor electrically coupled to the stator, the electrical conductor being adapted to extend from the interior volume to an exterior location through the opening in the end cover for connection to a power cable extending through the opening,

wherein the second volume is adapted to house an excess portion of the electrical conductor to prevent the electrical conductor from contacting rotating components disposed within the interior volume.

19. The electric motor as recited in claim 18, wherein the end cover is adapted with a cable opening for receiving a power cable into the second volume.