Title:
ドラム式洗濯機
Document Type and Number:
Japanese Patent JP3977762
Kind Code:
B2
Abstract:
A drum washing machine including a cylindrical drum, a DC brushless motor directly connected to the drum, a current detector detecting current flowing through the motor, a torque control vector-controlling the motor on the basis of the current detected by the current detector so that motor torque becomes optimum at least in a wash or dehydration operation, and a laundry weight estimator accelerating the motor with a maximum output torque developed when determining that motor speed is between a first speed at which laundry is assumed to start falling from an uppermost part of inner periphery of the drum when motor speed is reduced from a high speed side and a second speed at which laundry is assumed to start sticking to an uppermost part of the inner periphery of the drum, estimating laundry weight according to a q-axis current value in the vector control during an accelerating period.
Inventors:
Yoji Okazaki
Tsuyoshi Hosito
Tsuyoshi Hosito
Application Number:
JP2003059906A
Publication Date:
September 19, 2007
Filing Date:
March 06, 2003
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
D06F33/02; D06F25/00; D06F39/00
Domestic Patent References:
| JP9051700A | ||||
| JP11319367A | ||||
| JP11090088A | ||||
| JP2001276469A | ||||
| JP2001347097A | ||||
| JP2002252995A | ||||
| JP2001178992A | ||||
| JP2002360970A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Kiyoshi Ogawa
Kiyoshi Ogawa