CONTROLLER FOR INVERTER,申请号JP19810059716-传众专利搜索

CONTROLLER FOR INVERTER

申请公布号：JPS57177295(A)

申请号：JP19810059716

申请日期：1981.04.22

申请公布日期：1982.10.30

申请人：

TOYO DENKI SEIZO KK

发明人：SHIODA TAKESHI;FUKUYAMA MAKOTO

分类号：H02P27/06;H02M7/48;H02P23/00

主分类号：H02P27/06

摘要：PURPOSE:To always maximize the efficiency of an inverter by deciding the maximum efficiency operating frequency and a delay phase angle stored in advance by the set rotating speed, applying an operating frequency command to a power converter and regulating a voltage so that the delay phase angle is coincided. CONSTITUTION:A microprocessor 12 inputs the output of a rotating speed setter 3' through an A/D converter 11, outputs the value of the maximum operating frequency and the time conversion value of the delay phase angle of the output of a memory cell 13, and stores it in the internal memory unit. Control signals of respective phases are, for example, applied to a gate circuit 9 to allow the microprocessor 12 to outputs a PWM waveform signal to meet the maximum operating frequency. The output of a waveform shaping current zero detector 14 is inputted to the microprocessor 12, which reads by its internal timer the difference between the time of the zero point of the current and the time conversion value of the delay phase angle stored in the memory unit of the microprocessor 12, thereby regulating the ON-OFF width of the PWM waveform so that the time difference becomes zero.