Totally Enclosed Type Main Drive Motor for Vehicle

• US 20080030086A1
• Filed: 09/29/2005
• Published: 02/07/2008
• Est. Priority Date: 10/01/2004
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kobayashi, Yoshitaka, Noda, Shinichi, Koyama, Taihei, Yagi, Nobuyuki
• Granted Patent: US 7,701,096 B2
• Time in Patent Office: Days
• US Class Current: 310/57
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2220/50 Structural details of electrical machines
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B61C 9/50 in bogies
• CPC Class Codes: H02K 5/18 with ribs or fins for improving heat transfer
• CPC Class Codes: H02K 5/207 with openings in the casing specially adapted for ambient air
• CPC Class Codes: H02K 9/12 wherein the cooling medium circulates freely within the casing
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A totally enclosed type main drive motor for a vehicle includes a stator core arranged on an inner circumference of an outer casing frame, a bracket arranged on one end of the outer casing frame to have a bearing built-in, a housing arranged on the other end of the outer casing frame to have a bearing built-in, a rotor shaft having its both ends supported by the respective bearings, a rotor core arranged on the rotor shaft, a fan arranged on one end of the rotor shaft, openings formed in both axial ends of a peripheral wall of the outer casing frame, connective air ducts arranged outside the peripheral wall so as to communicate with the openings and a cooler for connecting these connective air ducts with each other and also releasing heat of air flowing in the connective air ducts to outside air. The outer casing frame is attached to the vehicle so that a central axis of the outer casing frame extends horizontally and intersects with a traveling direction of the vehicle at right angles. With rotation of the fan, air inside the outer casing frame flows in the cooler in circulation to cool down the air. The totally enclosed type main drive motor is provided with guide plates that collect traveling wind flowing around the outer casing frame to the cooler.

Claims

1. A totally enclosed type main drive motor for a vehicle, comprising:

a cylindrical outer casing frame attached to the vehicle so that a central axis of the outer casing frame extend horizontally and intersects with a vehicle'"'"'s traveling direction at right angles;

a stator core arranged on an inner circumference of the outer casing frame;

a bracket having a bearing built-in, the bearing being arranged on one end of the outer casing frame;

a housing having a bearing built-in, the bearing being arranged on the other end of the outer casing frame;

a rotor shaft having its both ends supported by the bearing of the bracket and the bearing of the housing;

a rotor core arranged in a substantially central part of the rotor shaft in a longitudinal direction thereof;

a fan arranged on one end of the rotor shaft;

openings formed in both axial ends of a peripheral wall of the outer casing frame, respectively;

a pair of connective air ducts arranged outside the peripheral wall so as to communicate with the openings;

a ventilation pipe connecting the connective air ducts with each other;

a cooler containing the ventilation pipe and also releasing heat of air flowing in the ventilation pipe to outside air;

a fan arranged on one end of the rotor shaft to allow air in the outer casing frame to flow into the cooler in circulation thereby cooling the air; and

traveling-wind guiding means for collecting traveling wind flowing around the outer casing frame to the cooler.

2. The totally enclosed type main drive motor for the vehicle of claim 1, wherein

the traveling-wind guiding means comprises guide plates arranged above and below the cooler horizontally.

3. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the upper guide plate has an end formed so as to project ahead of the cooler in the vehicle'"'"'s traveling direction, and

the end is bent at an angle within a range from 10°

to 45°

upwardly to the vehicle'"'"'s traveling direction.

4. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the lower guide plate has an end formed so as to project ahead of the cooler in the vehicle'"'"'s traveling direction, and

the end is bent at an angle within a range from 10°

to 60°

downwardly to the vehicle'"'"'s traveling direction.

5. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the guide plates are arranged ahead and rearward of the cooler in the vehicle'"'"'s traveling direction, and

the front guide plate is formed so that its width increases toward its front side continuously, while the rear guide plate is formed so that its width increases toward its rear side continuously, and both lateral edges of the front guide plate and both lateral edges of the rear guide plate are slanted at an angle within a range from 10°

to 60°

to the vehicle'"'"'s traveling direction.

6. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the guide plates have trapezoidal ends formed so as to project ahead of the cooler in the vehicle'"'"'s traveling direction and increase toward their front sides continuously.

7. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the guide plates have fan-shaped ends formed so as to project ahead of the cooler in the vehicle'"'"'s traveling direction and increase toward their front sides continuously.

8. The totally enclosed type main drive motor for the vehicle of claim 2, wherein

the outer casing frame has an upper attachment seat formed so as to project from an upper part of a peripheral wall of the outer casing frame toward a rear side in the vehicle'"'"'s traveling direction, and

the upper guide plate is formed so as to extend up to the upper attachment seat.

9. The totally enclosed type main drive motor for the vehicle of claim 1, wherein

the pair of connective air ducts have mutually-opposing inside surfaces arc-shaped in cross sections so as to project in a direction to approach each other, the inside surfaces constituting the traveling-wind guiding means.

10. The totally enclosed type main drive motor for the vehicle of claim 9, wherein

the outer casing frame has an upper attachment seat formed so as to project from an upper part of a peripheral wall of the outer casing frame toward a rear side in the vehicle'"'"'s traveling direction, and

the pair of connective air ducts are formed so that the inside surfaces extend up to the upper attachment seat.

11. The totally enclosed type main drive motor for the vehicle of claim 9 or 10, further comprising

guide plates which are arranged above and below the cooler horizontally, for collecting traveling wind flowing around the outer casing frame to the cooler.

12. A totally enclosed type main motor comprising:

a rotor core;

a plurality of rotor ventilation holes formed on an inner circumferential side of the rotor core;

an inside-air circulating fan arranged on an end of a rotor shaft, the end being positioned in the motor;

openings arranged on both end sides of a stator frame;

a cooler arranged outside the stator frame;

connective air ducts arranged outside the openings on both sides of the stator frame, respectively;

a cooling air duct in the form of a tube having a surface between the connective air ducts; and

a plurality of radiator fins arranged on an outer circumferential surface of the cooling air duct, wherein

the connective air ducts have respective inside spaces whose respective one ends are communicated with an in-motor space through the openings of the stator frame and whose respective other ends are communicated with an inside space of the cooling air duct, and

the in-motor space in the cooler is communicated with the openings on both sides of the stator frame, thereby allowing in-motor air to circulate in the cooler in order to cool it.

13. The totally enclosed type main motor of claim 12, wherein in view from the axial direction of the motor,

the connective air ducts, the cooling air duct and the radiator fins are formed so as to be a substantial fan.

14. The totally enclosed type main motor of claim 13, wherein in view from the axial direction of the motor,

respective angles of the openings on both ends of the stator frame and inlet angles of the connective air ducts are equal to either a pitch angle of blades of the inside-air circulating fans or integral multiples of the pitch angle.

15. The totally enclosed type main motor of claim 14, wherein in view from the axial direction of the motor,

the rotor ventilation holes are arranged at substantial centers on intervals each between the blades of the inside-air circulating fan.

16. The totally enclosed type main motor of claim 12, wherein

a ventilation path of the cooling air duct is formed to have a lattice-shaped structure toward a direction of ventilation.

17. The totally enclosed type main motor of claim 16, wherein

the ventilation path of the cooling air duct is formed so as to have any one of a honeycomb structure, a corrugated structure and a wavy-plate structure toward the direction of ventilation.

18. The totally enclosed type main motor of claim 16, wherein

the ventilation path of the cooling air duct is provided with discontinued endothermic fins toward the direction of ventilation.

19. The totally enclosed type main motor of claim 16, wherein

the ventilation path of the cooling air duct is provided with blow-in/blow-out endothermic fins which form windows toward the direction of ventilation.

20. The totally enclosed type main motor of claim 16, wherein

the lattice-shaped structure is divided, in an axial view thereof, into n pieces of lattice windows equally in a radial direction of the motor and m pieces of lattice windows equally in the circumferential direction of the motor.

21. The totally enclosed type main motor of claim 16, assuming that in view from a shaft center of the rotor core, the lattice-shaped structure comprises partition plates of n-stage in the radial direction, wherein

the lattice-shaped structure is provided, at an inlet of lattice windows thereof, with (n−

1) pieces of guide plates.

22. The totally enclosed type main motor of claim 12, wherein

the connective air ducts are provided, at respective inlets thereof, with rectifying lattices.

23. The totally enclosed type main motor of any one of claims 17 to 19, wherein

any one of a lattice-shaped structure, a honeycomb-shaped structure, a corrugate-shaped structure and a wavy-plate structure is successively provided from an inlet of the connective air duct up to an outlet of the connective air duct through the cooling air duct.

24. The totally enclosed type main motor of claim 12 or 13, wherein in view from the axial direction of the motor,

the connective air ducts and the cooling air duct are formed so as to have a substantial-C shaped configuration.

25. The totally enclosed type main motor of claim 12 or 13, wherein in view from a direction perpendicular to a shaft of the motor,

the connective air ducts and the cooling air duct are formed so as to have a substantial-arc shaped configuration.

26. The totally enclosed type main motor of any one of claims 12, 13 and 24, wherein in view from a direction perpendicular to a shaft of the motor,

the radiator fins have an overall contour shaped to be substantially rectangular or substantially circular in part.

27. The totally enclosed type main motor of claim 24, wherein

the inside-air circulating fan has a main board formed with a curvature radius which is substantially equal to a radius of an arc of the configuration by the connective air ducts and the cooling air duct.

28. The totally enclosed type main motor of claim 12 or 13, wherein in view from the direction perpendicular to the shaft of the motor,

at least one of the connective air ducts is shaped in a substantial arc.

29. The totally enclosed type main motor of claim 12, further comprising a bearing bracket rotatably supporting the rotor shaft on the side of the inside-air circulating fan, wherein

the bearing bracket has an inner wall whose general radius is within a range from about 1.2 to 1.4 times as large as a general radius of a main board of the inside-air circulating fan.

30. The totally enclosed type main motor of claim 12 or 13, wherein in view from the direction perpendicular to the shaft of the motor,

either the connective air ducts or the connective air ducts and the cooling air duct are formed with a straightly-slanted contour.

31. The totally enclosed type main motor of claim 30, wherein

the straightly-slanted contour has an angle of gradient within a range from approx. 30°

to 60°

, based on a reference axis of the rotor shaft.

32. The totally enclosed type main motor of claim 24, wherein in view from the direction perpendicular to the shaft of the motor,

the radiator fins have an overall contour shaped to be substantially rectangular or substantially circular in part.