OIL SPRAY COOLED, BRUSHLESS, VARIABLE SPEED DIRECT CURRENT GENERATOR

• US 3,733,503 A
• Filed: 06/16/1972
• Issued: 05/15/1973
• Est. Priority Date: 06/16/1972
• Status: Expired due to Term

• Current Assignee: Frederick Milton Potter
• Original Assignee: Frederick Milton Potter
• Inventors: Potter, Frederick Milton
• Primary Examiner(s): Shoop, Jr., William M.
• Application Number:
  US05/263,504
• Time in Patent Office: 333 Days
• Field of Search: 310/54,61,68 321/8,8C
• US Class Current: 310/68.00D
• CPC Class Codes: H02K 11/042 Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

An oil cooled generator has a plurality of diodes for converting alternating current power to direct current power. The diodes are mounted on heat sinks exteriorly of the generator so the diodes can be assembled to and disassembled from the generator without dismantling the generator. The heat sinks are cooled by spraying oil on finned surfaces of the heat sinks inside the generator and by circulating cooling oil at turbulent velocity between the diodes and heat sinks over major portions of the diode mounting surfaces for directly cooling the diodes and heat sinks.

Claims

1. A dynamo-electric machine comprising an oil-cooled generator providing alternating current power, heat sinks mounted on the generator, rectifying means mounted on the heat sinks in heat conducting relationship thereto for converting the alternating current power to direct current power, and means for conducting cooling oil between the heat sinks and rectifying means for directly cooling the heat sinks and rectifying means.

2. A dynamo-electric machine as described in claim 1 in which the rectifying means are mounted exteriorly of the generator so that the rectifying means can be assembled to and disassembled from the generator exteriorly thereof.

3. A dynamo-electric machine as described in claim 2 including means for spraying cooling oil on the heat sinks interiorly of the generator.

4. A dynamo-electric machine as described in claim 2 in which fins are formed on faces of the heat sinks sprayed by oil to facilitate cooling.

5. A dynamo-electric machine as described in claim 2 in which the rectifying means comprises a plurality of diodes.

6. A dynamo-electric machine as described in claim 1 which includes means for electrically insulating the heat sinks from the generator.

7. A dynamo-electric machine as described in claim 6 in which heat sink is connected to a generator output terminal and a pair of oppositely poled diodes are mounted on each heat sink in electrical conducting relationship thereto.

8. A dynamo-electric machine as described in claim 1 including means for circulating cooling oil at turbulent velocity over major portions of the mounting surfaces of the rectifying means.

9. A dynamo-electric machine comprising an oil cooled generator for providing alternating current power, heat sinks mounted on the generator, rectifying means for converting the alternating current power to direct current power mounted on the heat sinks in heat conducting relationship thereto so that heat from the rectifying means is transferred to the heat sinks, and means for spraying cooling oil on the heat sinks for cooling the heat sinks and rectifying means.

10. A dynamo-electric machine as described in claim 9 in which the rectifying means are mounted exteriorly of the generator so that the rectifying means can be assembled to and disassembled from the generator exteriorly thereof, and the heat sinks are mounted so that cooling oil is sprayed on the heat sinks from the interior of the generator.

11. A dynamo-electric machine as described in claim 10 in which fins are formed on faces of the heat sinks sprayed by oil to facilitate cooling.