Title:
ドラム式洗濯機
Document Type and Number:
Japanese Patent JP5097072
Kind Code:
B2
Abstract:
A drum type washing machine is equipped with a shorting circuit 33 including a reactor 35 connected in series between an AC power supply 32 and a rectifier circuit 37; and a short-circuit control element 36 connected between one end of the reactor and one input terminal of the rectifier circuit, in parallel with the AC power supply. A DC voltage Vd output from the rectifier circuit 37 via smoothing capacitors 38, 39 is applied to a first inverter circuit 22 for controlling driving of a drum motor 7. A control portion 30 for driving the first inverter circuit generates a short-circuit signal beginning at a zero-cross detection point of the AC power supply voltage and conducting the short-circuit control element at least during part of the period of a dehydrating process. The control portion 30 then sets the pulse width Tw of the short-circuit signal based on the target voltage Vt of the DC voltage Vd set in accordance with the target rotation speed Nt of the drum motor and the detected value of the DC voltage Vd. It is possible to control the DC voltage Vd supplied to the inverter circuit to be stepped up with appropriate conditions in accordance with the status.
Inventors:
Soichi Hatanaka
Kenjiro Tomita
Hisashi Hagiwara
Kenjiro Tomita
Hisashi Hagiwara
Application Number:
JP2008250985A
Publication Date:
December 12, 2012
Filing Date:
September 29, 2008
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
D06F25/00; D06F58/02; D06F34/10; D06F58/30
Domestic Patent References:
| JP2007068869A | ||||
| JP2006174689A | ||||
| JP2000024366A |
Attorney, Agent or Firm:
Ikeuchi, Sato & Partners