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US 5,181,398 AGranted
Dehydrator
AssigneeKabushiki Kaisha Toshiba
InventorsTetsukazu Tanaka, Masahiro Imai, Hiroshi Ikeda, Yosiyuki Makino
Life of this patent
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Abstract
A dehydrator includes a dehydration basket for containing clothes to be dehydrated, a variable speed motor such as a dc brushless motor for driving the dehydration basket so that the basket is rotated for dehydrating the clothes, and a microcomputer-based control device controlling rotational speed of the motor so that the rotational speed of the motor is increased stepwise when a dehydration operation is initiated.
Claims3
A dehydrator comprising:
- a) a dehydration basket for containing clothes to be dehydrated;
- b) a variable speed motor comprising a dc brushless motor for driving the dehydration basket so that the basket is rotated for dehydrating the clothes, the dc brushless motor being controlled so that a rotational speed thereof is varied by varying a voltage applied thereto;
- and
- c) motor speed control means for controlling the rotational speed of the dc brushless motor so that the rotational speed of the motor is increased toward a final target rotational speed by increasing a value of control data corresponding to the voltage applied to the dc brushless motor when a dehydration operation is initiated, the value of the control data being increased for a plurality of periods, and during each period the value of the control data is held without being increased for a set period of time, so that the value of the control data is increased stepwise.
1 more element
Dependencies are inferred from the claim text.