| 摘要 |
PURPOSE:To provide a small and simplified construction by generating the timing pulses 1-3 in order by means of a synchronized pulse to the line voltage and holding a control signal of modulation rate in this pulse order and giving output as a triggering pulse. CONSTITUTION:Power converter provides with the inverter 1, a DC capacitor 5, a linked reactor 2 and a linked transformer 3 and supplies AC power which is converted from DC power supply 6 for line 4. In addition, it also provides with PT 7, CT 8, a control device 9 and a phase controller 10a. The phase controller 10a consists of a synchronous detector 11, on which the pulse SCLK is generated and synchronized to the line voltage by the output of PT 7, each timing pulse generator 13 for a phase counter (T1), for a control signal latch (T2) and for a triggering signal latch T3, a phase counter 14, a holding circuit of control signal for modulation rate 15 and a memory element 16. Consequently both the control signal for the angle of phase difference and the control signal of modulation rate can be handled digitally. |
