| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a washing machine having a cloth amount detection means capable of accurately detecting the amount of cloth in a drum. Ž<P>SOLUTION: The washing machine includes: a motor 7 for rotationally driving the drum; a motor rotation number detection means 30 for detecting the rotation number of the motor 7; and a control section 31 for controlling the rotation of the motor 7. The control section 31 controls: a first detection step of applying a prescribed voltage to the motor 7, controlling a command rotation number so as to fix a slide which is a difference between the command rotation number and the actual rotation number of the motor, generating fixed acceleration torque, accelerating the rotation of the drum and measuring time t1 during which the rotation number rises by ΔN1: and a second detection step of applying a prescribed DC voltage to the motor 7, decelerating the rotation of the drum, and measuring time t2 during which the rotation number lowers by ΔN2, and the cloth amount is detected by angular acceleration α1 during acceleration and angular acceleration α2 during deceleration obtained from them. Thus, the dispersion of the friction torque of a drum rotary shaft is offset and the cloth amount is accurately detected by a simple configuration. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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