ELECTRIC MOTOR COIL BANDAGE

• US 3,560,777 A
• Filed: 08/12/1969
• Issued: 02/02/1971
• Est. Priority Date: 08/19/1968
• Status: Expired due to Term

• Current Assignee: Walter Dreher, Werner Moeller
• Original Assignee: Walter Dreher, Werner Moeller
• Inventors: Moeller, Werner, Dreher, Walter
• Application Number:
  US04/849,424
• Time in Patent Office: 539 Days
• US Class Current: 310/270
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: Y10S 174/22 Winding per se

Abstract

An electric motor coil bandage has at least two or more independent coil legs of a rotor or a stator each having a face connection which includes a coil rod connected to the individual coil leg. A bandage extends around a plurality of sets of the coil rods of identical coils and a rubber elastic compressible cushion is disposed between adjacent rods and is adapted to glide relatively to the insulation surface of these rods.

Claims

1. An electric motor having a plurality of selectively energized coils subjected to varying cooling and magnetization differences and different expansion characteristics, comprising a rod of a first winding adapted to be connected to a power supply, a rod of a second winding on each side of said rod of a first winding, only one of said rods of a second winding being adapted to be connnected to a power supply, a rubber elastic cushion compressed between all of said rods and being capable of gliding relative to the surface of said rods, and a bandage embracing a rod of a first winding and a rod of a second winding on each side of said rod of a first winding.

2. An electric motor coil bandage, according to claim 1, wherein said cushion comprises a cushion core and a cushion covering attached thereto.

3. An electric motor coil bandage, according to claim 1, wherein said cushion comprises a cushion core and a covering around said core, said core comprising a polyethyleneterephthalate felt saturated with a hydrocarbon halide, and impregnated by a methylpolysiloxane after it is dried.

4. An electric motor coil bandage according to claim 1, wherein said cushion includes a core comprising a polyethyleneterephthalate felt impregnated by polyurethane rubber.

5. An electric motor coil bandage, according to claim 1, wherein said cushion includes a cover portion comprising a silicon impregnated squeezed polyester mat, silicon content being 40 + or - 10 percent of the total weight of the cushion covering.

6. An electric motor coil bandage, according to claim 1, wherein said cushion includes a covering of a fiber glass-reinforced silicon resin foil.

7. An electric motor coil bandage, according to claim 1, wherein said cushion includes a covering comprising a flexible polyester resin reinforced by a polyester felt or fiber glass.

8. An electric motor coil bandage according to claim 1, wherein said cushion includes a covering of a flexible epoxide resin reinforced by a polyester felt or fiber glass.

9. An electric motor coil bandage, according to claim 1, wherein said cushion includes a covering of a polyethyleneterephthalate film.

10. An electric motor coil bandage, according to claim 1, wherein said cushion includes a covering having a layer of polytetrafluorethylene.

11. An electric motor coil bandage, according to claim 1, wherein said cushion includes a covering provided with a fiber glass reinforced silicon resin foil.