Quenching-angle control for an inverter

Details Quenching-angle control for an inverter Quenching-angle control for an inverter

H - Electricity

02

M

321/34

H02M 7/42 (2006.01) H02M 1/08 (2006.01) H02M 7/48 (2006.01)

Patent

CA 1140988

ABSTRACT OF THE DISCLOSURE 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.

356423

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