THREE-PHASE INVERTER,申请号JP19890200355-传众专利搜索

THREE-PHASE INVERTER

申请公布号：JPH0365060(A)

申请号：JP19890200355

申请日期：1989.08.03

申请公布日期：1991.03.20

申请人：

NIKKO KIKAI KK

发明人：TOSA SUSUMU;ISHIZUKI HIROSHI

分类号：H02M7/48;H02P27/06

主分类号：H02M7/48

摘要：PURPOSE:To suppress higher order harmonics and avoid radio interference end misoperation of peripheral electronic apparatuses such as an earth leakage breaker by a method wherein respective waveforms are outputted from output terminals U, V and W in accordance with respective specific waveform formulae and voltages between respective phases are so controlled as to have sinusoidal waveforms. CONSTITUTION:Following output waveform data are inputted to a ROM waveform data part. That is, the data that a voltage expressed by a formula I is outputted to the U-phase for a reference voltage, the data that a voltage expressed by a formula II is outputted to the V-phase for a reference voltage and the data that a voltage expressed by a formula III is outputted to the W-phase for a reference voltage are respectively inputted. A voltage control circuit 37 contains a comparator and compares the AC voltage waveforms outputted from respective output terminals U, V and W with the waveforms outputted from a multiplying circuit 36 to correct the AC voltage waveforms outputted from the output terminals U, V and W. With this constitution, sinusoidal waveform output voltages can be obtained and higher harmonics can be suppressed.