| 摘要 |
PROBLEM TO BE SOLVED: To provide a driver with which its main part in the line of three-phase 200 V can be used without changing the dimension, etc., of the apparatus, even when it is used for a line of three-phase 400V. SOLUTION: In a driver for a pump or the like, which is equipped with a converter part 21 connected to a commercial AC power source and converting an AC power into a DC power, an inverter part 23 for inverting the power converted into DC with the converter part 21 into an AC power in arbitrary frequency and voltage, a controller 14 for controlling the power switching element of the inverter part 23, and a power source 15 for supplying the controller 14 with DC low voltage, the power source 15 is equipped with a low-voltage converter part, which converts the voltage of the DC part which is a mass-produced article into required low voltage, and a step-down unit 27 which steps down the voltage of the DC part other than the mass-produced article into the voltage of the DC part which is the mass-produced article freely of insertion and extraction. |
