Process for insulating the stator of an electronically switched D.C. motor

• US 5,973,424 A
• Filed: 06/24/1998
• Issued: 10/26/1999
• Est. Priority Date: 10/28/1996
• Status: Expired due to Term

• Current Assignee: Papst-Motoren GmbH & Company KG
• Original Assignee: Papst-Motoren GmbH & Company KG
• Inventors: Kieninger, Jurgen, Engelberger, Reimund
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): GHAHRAMANI, SAEED
• Application Number:
  US09/091,929
• Time in Patent Office: 489 Days
• Field of Search: 310/67 R, 310/43, 264/272.2, 264/272.19, 29/596
• US Class Current: 310/43
• CPC Class Codes: F04D 25/0646 Details of the stator
• CPC Class Codes: F05D 2300/43 Synthetic polymers, e.g. plastics; Rubber
• CPC Class Codes: H02K 15/12 Impregnating, heating or drying of windings, stators, rotors or machines
• CPC Class Codes: H02K 3/44 Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
• CPC Class Codes: H02K 5/12 specially adapted for operating in liquid or gas combined with cooling arrangements H02K9/00
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

The present invention is directed to a method of insulating the stator of an electronically commutated direct current motor, in order to also fulfill high insulation and protection requirements. This method comprises the following steps:

the stator (1) is introduced into a closable form with laterally retractable jaws (21);

the form is closed, wherein it encloses the outer contours of the stator (1) including the printed circuit board (11), with a spacing, at least in regions;

a thermoplastic hot-melt adhesive based on polyamide is injected under pressure into the form;

the form is opened and the extrusion-coated stator (1) is removed.

Claims