Thermal management of linear motor

• US 10,384,913 B2
• Filed: 06/13/2016
• Issued: 08/20/2019
• Est. Priority Date: 06/13/2016
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Schmidt, Walter Thomas, Manes, Enrico, Wawrzyniak, Beata I., Yun, Thomas M., Chen, Shihemn, Tangudu, Jagadeesh, Piech, Zbigniew
• Primary Examiner(s): Desai, Naishadh N
• Application Number:
  US15/181,253
• Publication Number:
  US 20170355568A1
• Time in Patent Office: 1,163 Days
• Field of Search: 310179-210
• CPC Class Codes: B66B 11/0407 actuated by an electrical linear motor in the counterweight B66B17/12
• CPC Class Codes: F28D 15/02 in which the medium condenses and evaporates, e.g. heat pipes heat pipes used in solar heat collectors F24S10/95; in radiators F28D1/0226; in nuclear reactors G21C15/257
• CPC Class Codes: H02K 1/12 Stationary parts of the magnetic circuit
• CPC Class Codes: H02K 1/34 Reciprocating, oscillating or vibrating parts of the magnetic circuit
• CPC Class Codes: H02K 41/031 of the permanent magnet type
• CPC Class Codes: H02K 9/02 by ambient air flowing through the machine
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

The present disclosure relates generally to a propulsion system for an elevator having a first motor portion mounted to one of an object to be moved and a stationary structure and a second motor portion mounted to the other of the object to be moved and the stationary structure, the first motor portion having at least one coil.

Claims

1. An elevator system comprising:

a hoistway;

an elevator car to travel in the hoistway;

a first motor portion mounted to one of the elevator car and the hoistway, the first motor portion having at least one coil; and

a second motor portion mounted to the other of the elevator car and the hoistway, the second motor portion having at least one permanent magnet;

wherein the first motor portion includes a cooling member to allow heat removal from the at least one coil of the first motor portion.

2. The elevator system of claim 1, wherein the cooling member is a heat exchanger disposed between two coils of the first motor portion.

3. The elevator system of claim 2, wherein the heat exchanger includes at least one of a heat tube, a vapor chamber heat pipe, a liquid fluid circuit, and a gas fluid circuit.

4. The elevator system of claim 2, wherein the heat exchanger includes a phase change material.

5. The elevator system of claim 2, wherein the heat exchanger includes a material having a thermal conductivity higher than a thermal conductivity of the at least one coil.

9. The elevator system of claim 1, further comprising a coil plug disposed at least partially inside of the at least one coil, wherein the cooling member is formed as part of the coil plug.

10. The elevator system of claim 9, wherein the cooling member comprises a material having a higher thermal conductivity than the at least one coil.

11. The elevator system of claim 9, wherein the cooling member includes a plurality of openings extending through the coil plug.

6. An elevator system comprising:

a hoistway;

an elevator car to travel in the hoistway;

a first motor portion mounted to one of the elevator car and the hoistway, the first motor portion having at least one coil; and

a second motor portion mounted to the other of the elevator car and the hoistway, the second motor portion having at least one permanent magnet;

wherein the first motor portion includes a cooling member to allow heat removal from the at least one coil of the first motor portion;

wherein the cooling member is a heat exchanger disposed between two coils of the first motor portion

wherein the first motor portion has a first width at a first location and a second width at a second location, the heat exchanger being disposed at the second location such that the second width is greater than the first width.

7. The elevator system of claim 6, wherein the first motor portion is mounted to the hoistway, the first location is at least one of a lower portion of the hoistway, and the second location is a central portion of the hoistway.

8. An elevator system comprising:

a hoistway;

an elevator car to travel in the hoistway;

a first motor portion mounted to one of the elevator car and the hoistway, the first motor portion having at least one coil; and

a second motor portion mounted to the other of the elevator car and the hoistway, the second motor portion having at least one permanent magnet;

wherein the first motor portion includes a cooling member to allow heat removal from the at least one coil of the first motor portion;

at least one sheet disposed on at least one face of the first motor portion, wherein the cooling member is formed as part of the at least one sheet as a plurality of openings through the at least one sheet to allow heat removal from the at least one coil of the first motor portion.

12. A propulsion system comprising:

a moving motor portion configured to be fixed to an object to be moved; and

a stationary motor portion having at least one coil and configured to be fixed to a stationary structure, wherein the moving motor portion and the stationary motor portion are configured to coact to control the movement of the moving motor portion relative to the stationary motor portion;

wherein the stationary motor portion includes a cooling member to allow heat removal from the at least one coil of the stationary motor portion.

13. The propulsion system of claim 12, wherein the cooling member is a heat exchanger disposed between two coils of the stationary motor portion.

14. The propulsion system of claim 13, wherein the heat exchanger includes at least one of a heat tube, a vapor chamber heat pipe, a liquid fluid circuit, and a gas fluid circuit.

15. The propulsion system of claim 13, wherein the heat exchanger includes a phase change material.

16. The propulsion system of claim 13, wherein the heat exchanger includes a material having a thermal conductivity higher than a thermal conductivity of the at least one coil.

18. The propulsion system of claim 12, further comprising a coil plug disposed at least partially inside of the at least one coil, wherein the cooling member is formed as part of the coil plug.

19. The propulsion system of claim 18, wherein the cooling member comprises a material having a higher thermal conductivity than the at least one coil.

20. The propulsion system of claim 18, wherein the cooling member includes a plurality of openings extending through the coil plug.

17. A propulsion system comprising:

a moving motor portion configured to be fixed to an object to be moved; and

a stationary motor portion having at least one coil and configured to be fixed to a stationary structure, wherein the moving motor portion and the stationary motor portion are configured to coact to control the movement of the moving motor portion relative to the stationary motor portion;

wherein the stationary motor portion includes a cooling member to allow heat removal from the at least one coil of the stationary motor portion;

at least one sheet disposed on at least one face of the stationary motor portion, wherein the cooling member is formed as part of the at least one sheet as a plurality of openings through the at least one sheet to allow heat removal from the at least one coil of the stationary motor portion.