PROTECTING DEVICE FOR MAGNET MOTOR - MATSUSHITA ELECTRIC IND CO LTD

Title:

PROTECTING DEVICE FOR MAGNET MOTOR

Document Type and Number:

Japanese Patent JPH0767390

Kind Code:

A

Abstract:

PURPOSE: To control the demagnetization protection setting current value of a magnet motor according to temperature, protect demagnetization properly, and then increase an operation load range and reduce starting failure.

CONSTITUTION: In an air-conditioner, a compressor 3 using an electric motor 8 is laid out and a current detector 11 and a circuit breaker 12 and a demagnetization protection device 10 of a magnet motor which is connected to a temperature detector 13 and changes demagnetization protection setting current value according to atmospheric temperature are provided.

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Inventors:

HAMACHI KUNIHIKO
MURAMATSU SHIGERU
FUJIWARA KATSUHIKO

Application Number:

JP20755893A

Publication Date:

March 10, 1995

Filing Date:

August 23, 1993

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

F25B1/00; H02P7/00; H02P21/34; H02P27/06; H02P29/02; H02P29/60; (IPC1-7): H02P7/63; F25B1/00; H02P7/00; H02P7/63

Attorney, Agent or Firm:

Akira Kobiji (2 outside)

Next Patent: MOTOR DRIVER CIRCUIT