JPS5644370A - Manufacture of coil for electric machine - Google Patents

Manufacture of coil for electric machine

Info

Publication number
JPS5644370A
JPS5644370A JP11730979A JP11730979A JPS5644370A JP S5644370 A JPS5644370 A JP S5644370A JP 11730979 A JP11730979 A JP 11730979A JP 11730979 A JP11730979 A JP 11730979A JP S5644370 A JPS5644370 A JP S5644370A
Authority
JP
Japan
Prior art keywords
resin
coil
electric machine
pressure reduction
hardening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11730979A
Other languages
Japanese (ja)
Inventor
Koichi Moriyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11730979A priority Critical patent/JPS5644370A/en
Publication of JPS5644370A publication Critical patent/JPS5644370A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

PURPOSE:To decrease voids in thermosetting resin after hardening and improve the dielectric breakdown voltage of a coil for an electric machine by a method wherein the resin is heated and hardened under a pressure reduction condition while gas sucked under the pressure reduction is purified and exhausted into the atmospheric air. CONSTITUTION:Pressure in a vacuum bell jar 1 is lowered by means of a vacuum pump 3 since just after thermohardening resin such as epoxy is impregnated to a conductor of a coil 2 for an electric machine and an insulating layer wound on the circumference. The resin is heated by means of an infrared heater 4 at the same time. Gas generated at that time is forcedly exhausted into the atmospheric air through a gas line filter 5. Pressure reduction is stopped just before the resin begins to harden. Thus, voids in the resin after hardening are decreased, and the dielectric breakdown voltage of the coil for the electric machine can be improved.
JP11730979A 1979-09-14 1979-09-14 Manufacture of coil for electric machine Pending JPS5644370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11730979A JPS5644370A (en) 1979-09-14 1979-09-14 Manufacture of coil for electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11730979A JPS5644370A (en) 1979-09-14 1979-09-14 Manufacture of coil for electric machine

Publications (1)

Publication Number Publication Date
JPS5644370A true JPS5644370A (en) 1981-04-23

Family

ID=14708549

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11730979A Pending JPS5644370A (en) 1979-09-14 1979-09-14 Manufacture of coil for electric machine

Country Status (1)

Country Link
JP (1) JPS5644370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112940U (en) * 1980-12-29 1982-07-13
JPS57112941U (en) * 1980-12-29 1982-07-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57112940U (en) * 1980-12-29 1982-07-13
JPS57112941U (en) * 1980-12-29 1982-07-13

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