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Patent Searching and Data


Title:
WASHING MACHINE
Document Type and Number:
Japanese Patent JP2003326084
Kind Code:
A
Abstract:

To prevent a clutch mechanism from being broken by detecting the rotating state of a motor by a plurality of rotation-detecting means, and even when an abnormality occurs on one of the rotation-detecting means, the other means detects the rotation, and prohibiting a clutch operation while the motor is rotating; and to increase safety and reliability for a wasting machine which drives the motor by an inverter circuit.

DC power of a rectification circuit 2 which is connected with an AC power source 1 is inverted into AC power by the inverter circuit 3, and the motor 4 is driven. By the motor 4, an agitating blade or a washing-cum- dehydrating tub is driven. The rotor position of the motor 4 is detected by a rotor position-detecting means 5, and the rotation of the rotor is detected by a counter electromotive force-detecting means 7. Then, the inverter circuit 3 is controlled by a controlling means 6, and a motor shaft output is transmitted and switched to the agitating blade or the washing-cum-dehydrating tub by a clutch mechanism 12. The controlling means 6 controls the clutch mechanism 12 by the rotor position-detecting means 5 and the counter electromotive force- detecting means 7.


Inventors:
KIUCHI MITSUSACHI
HAGIWARA HISASHI
KUBO YOSHIO
SAKIDA YOSHIAKI
Application Number:
JP2002135143A
Publication Date:
November 18, 2003
Filing Date:
May 10, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
D06F37/40; (IPC1-7): D06F37/40
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)