Molded motor

• US 6,002,185 A
• Filed: 11/27/1998
• Issued: 12/14/1999
• Est. Priority Date: 06/03/1998
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Nakao, Kenji, Sugiyama, Takeshi, Imada, Kensuke
• Primary Examiner(s): LaBalle, Clayton
• Assistant Examiner(s): Nguyen, Tran N
• Application Number:
  US09/200,859
• Time in Patent Office: 382 Days
• Field of Search: 310/42, 310/43, 310/87, 310/89, 310/45, 310/254, 310/258, 29/596, 29/598, 29/605-606, 264/272.2, 264/272.19
• US Class Current: 310/43
• CPC Class Codes: H02K 5/08 Insulating casings
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49012 Rotor
• CPC Class Codes: Y10T 29/49071 by winding or coiling
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

The present invention prevents the formation of cracks in a molded main body and the corrosion of a stator core.

A molded motor is provided with: a stator 1 which has a stator core 6 which has a plurality of tooth portions 12 extending radially inward which are formed equidistantly around it and which is laminated from a plurality of layers of cold-rolled steel plate, and stator coils 8 composed of lead wires wound around the tooth portions 12 of the stator core 6; a rotor rotatably disposed inside the stator 1; and a molded main body 30 made of resin which covers the stator 1, and spaces 32 are formed in the molded main body 30 between the stator coils 8.

Claims

1. A molded motor comprising:

a stator which has a stator core which has a plurality of tooth portions extending radially inward which are formed equidistantly around it and which is laminated from a plurality of layers of magnetic metal plate, and stator coils composed of lead wires wound around said tooth portions of said stator core;

a rotor rotatably disposed inside said stator; and

a molded main body made of resin which covers said stator,

wherein spaces are formed in said molded main body between said stator coils.

2. The molded motor according to claim 1 wherein said stator and said molded main body are integrated by insertion molding.

3. The molded motor according to claim 1 wherein said molded main body is composed of a material comprising polyphenylene sulfide resin to which alkene elastomers have been added.

4. The molded motor according to claim 1 wherein the thickness of said molded main body at the spaces is approximately uniform.

5. The molded motor according to claim 1 wherein said magnetic plate is a cold-rolled steel plate.