Patent
Light weight rotor and stator with multiple coil windings in thermal contact
| العنوان: | Light weight rotor and stator with multiple coil windings in thermal contact |
|---|---|
| Patent Number: | 603,451& |
| تاريخ النشر: | March 07, 2000 |
| Appl. No: | 09/227,552 |
| Application Filed: | January 08, 1999 |
| مستخلص: | A lightweight engine-driven generator set including a stator having at least first and second windings (preferably three-phase) and a rotor having a soft magnetic core and a plurality of high energy product permanent magnets, separated by consequence poles, disposed proximate the stator such that relative motion of the rotor and stator causes magnetic flux from the rotor to interact with and induce current in the stator windings. The first winding includes a predetermined number of turns corresponding to a first predetermined voltage output; and the second winding includes a predetermined number of turns corresponding to a second predetermined voltage output, the respective windings being grouped together as a unit and wound about the core such that the respective winding coils are wound in continuous close thermal contact with each other. The first winding generates a relatively high voltage, low amperage signal, and the second winding generates a relatively low voltage, high amperage signal; and a switch provides for selection of the desired output. Preferably the rotor is a hollow cylinder mounted on the engine shaft for rotation about the stator and such that the proper gap distance between rotor and stator is maintained during rotation of the rotor without bearings external to the engine. The low voltage, high amperage winding (or winding group) may be tapped to provide a selectable voltage output. Suitable rectifiers and inverters may be provided to effect selective DC and AC output signals. |
| Inventors: | Scott, Harold C. (Boulder, CO); Bednorz, Ardel R. (Alamogordo, NM); Johnson, G. Weylin (Hastings, NE); Anderson, William J (Alamogordo, NM); Davis, Mitchell K. (La Luz, NM); Tally, Henry (Alamogordo, NM) |
| Assignees: | Coleman Powermate, Inc. (Kearney, NE) |
| Claim: | We claim |
| Claim: | 1. A method for operating a stator, the method comprising |
| Claim: | providing on the stator a first winding including a predetermined number of turns corresponding to a first predetermined voltage output; |
| Claim: | providing on the stator a second winding including a predetermined number of turns corresponding to a second predetermined voltage output, the first and second windings being configured for close thermal contact; and |
| Claim: | applying current to the first winding in the absence of current to the second winding, wherein the second winding operates as a heat sink for the first winding. |
| Claim: | 2. The method of claim 1 wherein thermal contact is facilitated by varnish fill. |
| Claim: | 3. The method of claim 1 wherein the first and second windings are concurrently wound about stator. |
| Claim: | 4. The method of claim 3 wherein the stator comprises a laminate core. |
| Claim: | 5. The method of claim 3 wherein thermal contact is facilitated by varnish fill. |
| Claim: | 6. The method of claim 1 wherein the first winding comprises a respective winding for each of three phases. |
| Claim: | 7. The method of claim 6 wherein the second winding comprises a respective winding for each of three phases. |
| Current U.S. Class: | 322/46; 310/179 |
| Current International Class: | H02K 300 |
| Patent References Cited: | 2485474 October 1949 Brainard 3818257 June 1974 Porter et al. 4037124 July 1977 Kullmann et al. 4163187 July 1979 Thomas 4216455 August 1980 Hester 4217538 August 1980 Ziemacki 4591746 May 1986 Kamiyama 4743777 May 1988 Shilling et al. 4788486 November 1988 Mashino et al. 4814027 March 1989 Masumoto et al. 4873962 October 1989 Safranek 4950973 August 1990 Kouba 5051634 September 1991 Overton 5093611 March 1992 Nakamura et al. 5162686 November 1992 Royer 5204566 April 1993 Borgen et al. 5289066 February 1994 Clark 5359248 October 1994 Nagate et al. 5369325 November 1994 Nagate et al. 5391975 February 1995 Okubo 5502368 March 1996 Syverson et al. 5510662 April 1996 Tanimoto et al. |
| Other References: | Declaration of Harold C. Scott, dated Feb. 13, 1995 with Exhibits A-G. |
| Primary Examiner: | Enad, Elvin |
| Assistant Examiner: | Ponomarenko, N. |
| Attorney, Agent or Firm: | Lechter, Michael A. Bachand, William R. Squire Sanders & Dempsey |
| رقم الانضمام: | edspgr.0603451. |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |