| 摘要 |
<p>For the purpose of controlling the quenching angle of an inverter connecting a direct-current line to an alternating-current network, the control angle .beta. corresponding to the firing time of the inverter rectifiers counted backwards from the zero passage to the semi-oscillation of the commutating voltage, is predetermined by the relationship .beta.2 - ? - 2 (1 - cos .gamma.N) - ? = O as a reference input, wherein: .gamma.N is the rated value of the quenching angle; i is the value of the direct current related to the rated value; u is the value of the alternating voltage related to the rated value, taking into account the ratio between the voltage at the voltmeter and the voltage at the inverter rectifler, and K is four times the relative direct-voltage change.</p> |
