Patent ID: 7898829

Claim:
A three-phase rectifier device, comprising: the rectifier circuit including a first three-phase diode bridge having three input ends and a pair of output ends, said first three-phase diode bridge applying full-wave rectification to currents inputted to said input ends to obtain a first rectified current, and outputting said first rectified current from one of said output ends, a first chopper having a pair of output ends, said first chopper performing a first chopper operation to receive a current having a first fundamental frequency of a first value as said first rectified current, a second three-phase diode bridge having three input ends and a pair of output ends, said second three-phase diode bridge applying full-wave rectification to currents inputted to said input ends to obtain a second rectified current, and outputting said second rectified current from one of said output ends, and a second chopper having a pair of output ends, said second chopper performing a second chopper operation to receive a current having the first fundamental frequency of the first value as said second rectified current, said pair of output ends of said first chopper and said pair of output ends of said second chopper being connected in parallel; and a three-phase transformer that receives three-phase currents, the three-phase currents having a second fundamental frequency of a second value that is ⅙ of said first value and said three-phase currents having mutual phase differences of 120 degrees at the second fundamental frequency, and that outputs first three-phase alternating currents having phase differences of 15 degrees at the second fundamental frequency respectively from said three-phase currents, and that also outputs second three-phase alternating currents having phase differences of 30 degrees at the second fundamental frequency from said first three-phase alternating currents.