DRUM WASHING MACHINE

Title:

DRUM WASHING MACHINE

Document Type and Number:

WIPO Patent Application WO/2004/009899

Kind Code:

A1

Abstract:

The balance of the laundry sticking to the inner periphery surface of the drum of a drum washing machine having a drum rotating on an almost horizontal axis is adjusted before spin-drying. A brushless DC motor is adopted for a drum drive motor. The motor current is separated into a d-axis current and a q-axis current to carry out speed control by vector control for controlling these currents independently. Before spin-drying, the rotating speed is increased (S1) up to a speed at which the laundry sticks firmly to the inner periphery surface of the drum. Then, the machine enters the rotating speed slow-down operation mode (S2) in which the rotating speed is gradually decreased. The balance of the laundry inside the drum is judged to be proper during the speed slow-down, the rotating speed is increased to enter a spin-drying mode (S8). The balance of the laundry inside the drum is judged on the basis of the fluctuation width of the q-axis current.

More Like This:

WO/2000/039382	A LAUNDRY APPLIANCE WITH LOAD BALANCING SYSTEM
WO/2000/028128	METHOD FOR CONTROLLING THE OFF-BALANCE STATE OF THE LOAD OF A WASHING MACHINE
JP3170140	DEHYDRATING AND WASHING MACHINE

Inventors:

OKAZAKI YOJI
HOSOITO TSUYOSHI
KAWABATA SHINICHIRO

Application Number:

PCT/JP2003/009215

Publication Date:

January 29, 2004

Filing Date:

July 18, 2003

Export Citation:

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Assignee:

TOSHIBA KK (JP)

International Classes:

D06F33/40; D06F35/00; D06F37/20; H05B37/02; D06F33/48; (IPC1-7): D06F33/02

Foreign References:

JPS4738114B1	1972-09-26
JPH08266788A	1996-10-15
JP2001046780A	2001-02-20
EP0903845A2	1999-03-24
JP2001310097A	2001-11-06

Other References: