Vehicle use AC generation system, vehicle use AC generator used therefor and drive force transmission system used therefor

• US 20020117935A1
• Filed: 09/17/2001
• Published: 08/29/2002
• Est. Priority Date: 02/28/2001
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Tanaka, Naoyuki, Honda, Yoshiaki, Seino, Hiromitsu, Kanazawa, Hiroshi, Tahara, Kazuo, Takano, Masami
• Application Number:
  US09/953,439
• Publication Number:
  US 20020117935A1
• Time in Patent Office: Days
• US Class Current: 310/263
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 7/116 with gears

Abstract

In order to provide a small sized, high speed rotation and high output vehicle use AC generation system, a vehicle use AC generator and a vehicle use AC generator use drive force transmission system which enhances output in a broad range from a low speed to a high speed, in a vehicle use AC generation system including a vehicle use AC generator coupled to a crank pulley shaft of an engine via a pulley, the vehicle use AC generator being provided with a rotor having magnetic poles and a field winding for magnetizing the magnetic poles, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a first shaft to which the pulley is provided and a second shaft integral with the rotor, wherein the first shaft is disposed within the side face of the vehicle use AC generator and at a equivalent position with respect to the second shaft when seen from the crank pulley shaft or rather at the side of the crank pulley shaft from the second shaft and the first shaft and the second shaft are coupled via a motive force transmission mechanism including a transmission for increasing speed at the side of the pulley. Further, a vehicle use AC generator is provided with a rotor 401 including a pair of claw shaped magnetic poles 405A and 405B and a field winding 406 wound radially inside with respect to the pair of claw shaped magnetic poles 405A and 405B and a stator 414 in which a stator winding 415 is wound on a stator iron core 414, and is further provided with a drive force transmission shaft 419 which is provided independent from a rotary shaft 403 of the rotor 401 and transmits a drive force to the rotary shaft 403 after increasing the rpm.

Claims

1. In a vehicle use AC generation system which includes a vehicle use AC generator coupled to a crank pulley shaft of an engine via a pulley, the vehicle use AC generator being provided with a rotor having magnetic poles and a field winding for magnetizing the magnetic poles, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a first shaft to which the pulley is provided and a second shaft integral with the rotor, wherein the first shaft to which the pulley is provided is disposed within the side face of the vehicle use AC generator and at equivalent position with the second shaft when seen from the crank pulley shaft or rather at the side of the crank pulley shaft from the second shaft and the first shaft to which the pulley is provided and the second shaft are coupled via a motive force transmission mechanism including a transmission for increasing speed at the side of the pulley.

4. A vehicle use AC generation system of claim 1, wherein the transmission is constituted in such a manner that an rpm ratio of the second shaft and the engine crank pulley shaft assumes in a range of 4-6 times.

7. A vehicle use AC generation system of claim 1, wherein a cooling water circulating passage for the engine and a cooling water circulating passage for the vehicle use AC generator are provided in parallel with respect to a common radiator.

10. A vehicle use AC generation system of claim 1, wherein the vehicle use AC generator includes a bracket provided with the motive force transmission mechanism and a liquid cooling type cooling means and the bracket is provided with a gear casing and a stationary portion for the engine in the motive force transmission mechanism.

13. A vehicle use AC generation system of claim 10, wherein a pair of vehicle use AC generator stationary portions are provided at positions which sandwich both sides of the gear casing portion in the bracket.

2. In a vehicle use AC generation system which includes a vehicle use AC generator coupled to a crank pulley shaft of an engine via a pulley, the vehicle use AC generator being provided with a rotor having magnetic poles and a field winding for magnetizing the magnetic poles, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a shaft integral with the rotor, a motive force transmission mechanism including a transmission for increasing speed at the side of the pulley and a liquid cooling type cooling means for cooling the motive force transmission mechanism, wherein the shaft integral with the rotor and the pulley are coupled via the motive force transmission mechanism.

5. A vehicle use AC generation system of claim 2, wherein the transmission is constituted in such a manner that an rpm ratio of the second shaft and the engine crank pulley shaft assumes in a range of 4-6 times.

8. A vehicle use AC generation system of claim 2, wherein a cooling water circulating passage for the engine and a cooling water circulating passage for the vehicle use AC generator are provided in parallel with respect to a common radiator.

11. A vehicle use AC generation system of claim 2, wherein the vehicle use AC generator includes a bracket provided with the motive force transmission mechanism and the liquid cooling type cooling means and the bracket is provided with a gear casing and a stationary portion for the engine in the motive force transmission mechanism.

14. A vehicle use AC generation system of claim 11, wherein a pair of vehicle use AC generator stationary portions are provided at positions which sandwich both sides of the gear casing portion in the bracket.

16. A vehicle use AC generator of claim 15, further being provided with a liquid cooling type cooling means for cooling the motive force transmission mechanism.

17. A vehicle use AC generator of claim 16, wherein in the liquid cooling type cooling means a jacket including a water passage for cooling the stator and the transmission is formed around the outer circumferential portion of the stator.

20. A vehicle use AC generator of claim 18, wherein the permanent magnet for auxiliary excitation is accommodated in a permanent magnet holder, and the permanent magnet holder is inserted through slits provided along the inside of the claw shaped magnetic poles.

21. A vehicle use AC generator of claim 19, wherein the permanent magnet for auxiliary excitation is accommodated in a permanent magnet holder, and the permanent magnet holder is inserted through slits provided along the inside of the claw shaped magnetic poles.

3. In a vehicle use AC generation system which includes a vehicle use AC generator coupled to a crank pulley shaft of an engine via a pulley, the vehicle use AC generator being provided with a rotor having magnetic poles and a field winding for magnetizing the magnetic poles, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a first shaft to which the pulley is provided, a second shaft integral with the rotor, a motive force transmission mechanism including a transmission for increasing speed at the side of pulley and a bracket provided with the motive force transmission mechanism, wherein the bracket being provided with a gear casing and a stationary portion for the engine in the motive force transmission mechanism, the first shaft to which the pulley is provided is disposed within the bracket and at equivalent position with the second shaft when seen from the crank pulley shaft or rather at the side of the engine from the second shaft and the first shaft to which the pulley is provided and the second shaft are coupled via the motive force transmission mechanism provided at the bracket.

6. A vehicle use AC generation system of claim 3, wherein the transmission is constituted in such a manner that an rpm ratio of the second shaft and the engine crank pulley shaft assumes in a range of 4-6 times.

9. A vehicle use AC generation system of claim 3, wherein a cooling water circulating passage for the engine and a cooling water circulating passage for the vehicle use AC generator are provided in parallel with respect to a common radiator.

12. A vehicle use AC generation system of claim 3, wherein a pair of vehicle use AC generator stationary portions are provided at positions which sandwich both sides of the gear casing portion in the bracket.

15. In a vehicle use AC generator coupled to a crank pulley shaft of an engine via a pulley, the vehicle use AC generator being provided with a rotor having magnetic poles and a field winding for magnetizing the magnetic poles, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a first shaft to which the pulley is provided, a second shaft integral with the rotor, a motive force transmission mechanism including a transmission for increasing speed at the side of pulley and a bracket provided with the motive force transmission mechanism, wherein the bracket being provided with a gear casing and a stationary portion for the engine in the motive force transmission mechanism, the first shaft to which the pulley is provided is disposed within the bracket and at equivalent position with the second shaft when seen from the crank pulley shaft or rather at the side of the engine from the second shaft and the first shaft to which the pulley is provided and the second shaft are coupled via the motive force transmission mechanism provided at the bracket.

18. In a vehicle use AC generator including a rotor constituted by a pair of opposingly disposed claw shaped magnetic poles at each of top portions of which a plurality of claw portions are formed and a field winding for magnetizing the claw shaped magnetic poles and being secured to a rotor shaft, permanent magnets for auxiliary excitation disposed between the claw shaped magnetic poles in the rotor, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a liquid cooling type cooling means for cooling heat generation from the stator and a bracket, wherein a pulley shaft provided with a pulley is provided independent from the rotor shaft, and the pulley shaft is elongated in the axial direction exceeding the bracket.

19. In a vehicle use AC generator including a rotor constituted by a pair of opposingly disposed claw shaped magnetic poles at each of top portions of which a plurality of claw portions are formed and a field winding for magnetizing the claw shaped magnetic poles and being secured to a rotor shaft, permanent magnets for auxiliary excitation disposed between the claw shaped magnetic poles in the rotor, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, a liquid cooling type cooling means for cooling heat generation from the stator and a bracket, wherein a pulley shaft provided with a pulley is provided independent from the rotor shaft, the pulley shaft and the rotor shaft are coupled via a transmission provided at the bracket as well as the pulley shaft is elongated in the axial direction exceeding the bracket.

22. In a vehicle use AC generator including a rotor constituted by a pair of opposingly disposed claw shaped magnetic poles at each of top portions of which a plurality of claw portions are formed and a field winding for magnetizing the claw shaped magnetic poles and being secured to a rotor shaft, permanent magnets for auxiliary excitation disposed between the claw shaped magnetic poles in the rotor, a stator which is disposed being spaced apart with a predetermined gap with respect to the rotor and has a stator winding for generating an AC voltage through magnetization of the magnetic poles, and a liquid cooling type cooling means for cooling heat generation from the stator, wherein as a material of the rotor a material having a tensile strength of about 500 MPa is used, as the permanent magnet a neodymium magnet is disposed between the claw shaped magnetic poles, a pulley shaft being provided independent from the rotor shaft and being designed to be rotated in the opposite direction from the rotor shaft.

24. A vehicle use AC generator of claim 23, wherein the motive force transmission shaft is coupled via a speed increasing gear series to the rotary shaft of the rotor.

25. A vehicle use AC generator of claim 24, wherein the speed increasing gear series is disposed at one end in the longitudinal direction of the rotary shaft of the rotor.

26. A vehicle use AC generator of claim 24, wherein a speed increasing ratio of the speed increasing gear series is set at about 2 times.

27. A vehicle use AC generator of claim 25, wherein a speed increasing ratio of the speed increasing gear series is set at about 2 times.

28. A vehicle use AC generator of claim 23, wherein a reinforcing ring is further provided which connects a plurality of claw portions provided for each of the pair of the claw shaped magnetic poles in the circumferential direction of the rotor.

29. A vehicle use AC generator of claim 24, wherein a reinforcing ring is further provided which connects a plurality of claw portions provided for each of the pair of claw shaped magnetic poles in the circumferential direction of the rotor.

30. A vehicle use AC generator of claim 25, wherein a reinforcing ring is further provided which connects a plurality of claw portions provided for each of the pair of claw shaped magnetic poles in the circumferential direction of the rotor.

31. A vehicle use AC generator of claim 26, wherein a reinforcing ring is further provided which connects a plurality of claw portions provided for each of the pair of claw shaped magnetic poles in the circumferential direction or the rotor.

32. A vehicle use AC generator of claim 27, wherein a reinforcing ring is further provided which connects a plurality of claw portions provided for each of the pair of claw shaped magnetic poles in the circumferential direction of the rotor.

33. A vehicle use AC generator of claim 28, wherein the reinforcing ring is provided at end portions in the axial direction of the rotor and is formed in a semispherical shape so as to cover the space between the plurality of claw portions.

34. A vehicle use AC generator of claim 30, wherein the reinforcing ring is provided at end portions in the axial direction of the rotor and is formed in a semispherical shape so as to cover the space between the plurality of claw portions.

35. A vehicle use AC generator of claim 30, wherein the reinforcing ring is provided at end portions in the axial direction of the rotor and is formed in a semispherical shape so as to cover the space between the plurality of claw portions.

36. A vehicle use AC generator of claim 31, wherein the reinforcing ring is provided at end portions in the axial direction of the rotor and is formed in a semispherical shape so as to cover the space between the plurality of claw portions.

37. A vehicle use AC generator of claim 32, wherein the reinforcing ring is provided at end portions in the axial direction of the rotor and is formed in a semispherical shape so as to cover the space between the plurality of claw portions.

39. A vehicle use AC generator use drive force transmission system of claim 38, wherein the idler pulley is at least provided with a first pulley connected to the output shaft of the engine and a second pulley connected to the rotary shaft of the rotor and having a different diameter as that of the first pulley and a further a clutch is provided which couples and decouples of the connection between the first pulley and the second pulley.

23. A vehicle use AC generator being provided with a rotor including a pair of claw shaped magnetic poles and a field winding wound radially inside with respect to the pair of claw shaped magnetic poles and a stator in which a stator winding is wound on a stator iron core and being further provided with a drive force transmission shaft which is provided independent from a rotary shaft of the rotor and transmits a drive force to the rotary shaft after increasing the rpm.

38. A vehicle use AC generator use drive transmission system for transmitting a drive force of an engine via a belt to a vehicle use AC generator which is provided with a rotor including a pair of claw shaped magnetic poles and a field winding wound radially inside with respect to the pair of claw shaped magnetic poles and a stator in which a stator winding is wound on a stator iron core being provided with an idler pulley which transmits the rpm of an output shaft of the engine to a rotary shaft of the rotor after speed increasing thereof.