| 摘要 |
PROBLEM TO BE SOLVED: To provide a cloth quantity sensing device for a washing machine and its method capable of improving the cloth quantity sensing precision and the efficiency of the washing machine by controlling a current, and detecting the speed of a motor. SOLUTION: This cloth quantity sensing device for the washing machine includes a torque command generator 101 generating a torque command signal in a BLDC motor drive device, a torque controller 102 outputting a q-axis current command signal, a current controller 103 applying a current control signal to an inverter section 106 in response to the q-axis command signal and a d-axis current command signal, a speed detecting section 111 detecting the driving speed of the BLDC motor 109, a cloth quantity sensing section 112 comparing a speed detection signal with a reference speed stored in advance to sense a cloth quantity, and a current command section 113 applying the d-axis current command signal to the current controller 103.
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