| 摘要 |
PROBLEM TO BE SOLVED: To provide a starting system of a motor that responds to variety of needs of use conditions by making variable the adaptable range of the fan motor by comparing a low-level voltage and a constant voltage value, and by setting a value of the minimum number of revolutions of the motor on the basis of the obtained compared value, when the low-level voltage is inputted. SOLUTION: This motor drive unit system is constituted by including: a drive unit; a voltage stabilization unit that is composed by including a voltage stabilization means, generates a constant voltage and feed it to the drive unit; and a power feed unit that feeds voltages to the voltage stabilization unit and the drive unit. The drive unit includes: a signal generation unit for generating an input signal that varies depending on the high level or the low level of an input voltage of the power feed unit; a comparison unit that compares the constant voltage of the voltage stabilization unit and the input signal of the signal generation unit, and generates a comparison signal; and a control unit that adjusts the number of revolutions of the motor on the basis of the comparison signal generated by the comparison unit. COPYRIGHT: (C)2005,JPO&NCIPI
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