| 摘要 |
PURPOSE:To provide the driving device, of a motor, which changes a reference current value so as to follow a change in an input voltage and which prevents damage by a fire due to an overcurrent. CONSTITUTION:A power supply 2 whose specifications are 200V as an example and which outputs an input voltage at a fluctuation of + or -10% is connected to a control device, a power-supply line 60 to which a driving voltage is supplied is connected in series with a rectifier 8 via a fuse 3, a current transformer 4 and a powersupply switch 5, and a varistor board 7 is connected in parallel. One pair of power supply lines 61 are provided with a relay 9, a capacitor 62 and a resistor 63, and an input-voltage detection part 16 to an inverter circuit and a current transformer 10 are connected in series. A power-supply line 64 at the output end of the inverter circuit is connected to a transformer 28, and it is connected also to a motor. |
