Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WASHING MACHINE
Document Type and Number:
Japanese Patent JP2003326086
Kind Code:
A
Abstract:

To stop a motor driving when an AC power source stops or a voltage drops during a dehydrating operation or a dehydration braking, to surely stop a washing-cum-dehydrating tub by a simple and inexpensive constitution after the restoration of the AC power source, and to increase safety in a washing machine which drives the motor by an inverter circuit.

A DC power source is constituted by connecting a rectification circuit 3 with the AC power source 1, and the motor 6 is driven by inverting DC power into AC power by the inverter circuit 5. A voltage state of the AC power source 1 is detected by power source voltage-detecting means 4 and 15, and the inverter circuit 5 is controlled by a controlling means 10. The controlling means 10 stops the driving of the motor 6 when the power source voltage- detecting means 4 and 15 detect the voltage decrease or the voltage stop of the AC power source 1 when the motor 6 is driven. Then, the rotation of the motor 6 is stopped by short-circuit braking when the returning to the normal voltage state of the AC power source 1 is detected.


Inventors:
HAGIWARA HISASHI
SAKIDA YOSHIAKI
KUBO YOSHIO
MATSUI SHOICHI
Application Number:
JP2002138165A
Publication Date:
November 18, 2003
Filing Date:
May 14, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
D06F37/40; H02H3/06; H02H3/24; H02P3/18; H02P6/06; H02P6/08; H02P6/12; H02P6/17; (IPC1-7): D06F37/40; H02P6/12
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)



 
Previous Patent: WASHING MACHINE

Next Patent: LAUNDRY APPLIANCE