Patent ID: 7315464

Claim:
A drive system that is given AC power from an AC power supply to drive targets to be activated, comprising: an AC conversion device for acquiring AC power from an AC power supply and converting the supplied AC power into converted AC power having a predetermined frequency and a predetermined voltage; an AC drive device that is given the converted AC power to be activated; a DC conversion device for acquiring AC power from an AC power supply and converting the supplied AC power into converted DC power having a predetermined voltage; and a DC drive device that is given the converted DC power to be activated, wherein the AC conversion device has a frequency converting unit for converting a frequency of AC power into a predetermined frequency and a voltage converting unit for converting a voltage of AC power into a predetermined voltage, the frequency converting unit includes only one pair of a DC power generating circuit for AC conversion and an alternating power generating circuit for AC conversion, in which the DC power generating circuit for AC conversion converts the supplied AC power into DC power, and the alternating power generating circuit for AC conversion converts DC power which is generated by the DC power generating circuit for AC conversion, into AC power of a predetermined frequency, and wherein the voltage converting unit includes: a first transformer for dropping a voltage of AC power generated by the alternating power generating circuit for AC conversion, and generating power electrically insulated against the AC power supply; and a second transformer for boosting the voltage of AC power dropped by the first transformer and generating converted AC power, and wherein the second transformer is directly driven by an alternating voltage outputted from the first transformer.