| 摘要 |
PROBLEM TO BE SOLVED: To leave cost as it is and control the rotation of a motor irrelevant to the power supply frequency by controlling ON-OFF time of the motor by a damped waveform width of back electromotive force of the voltage between capacitor terminals which is detected in OFF time of the motor in dehydrating process. SOLUTION: When a dehydrating process is executed without changing a pulley for transmitting the rotation to a washing and spin basket, the rotation speed in acceleration characteristics of 60Hz becomes higher compared with that of 50Hz in continuous dehydration process. Therefore, the ON-OFF of the motor is executed by a method applying a conventional method for detecting cloth quantity without changing the pulley for transmitting it to a washing and spin basket according to the frequency. In this case, the ON time of the motor is set long T1 and the OFF time of the motor is set short T2 till the set rotation speed so that the acceleration characteristics of continuous dehydration process is made equal to that of the normal continuous hydration, and after reaching the set rotation speed, the ON-OFF time of the motor is changed into T4 -T3 , and these T1 , T2 , T3 , T4 are so controlled as to be repeated. |
