H - Electricity – 02 – J
Patent
H - Electricity
02
J
323/10, 323/20
H02J 3/18 (2006.01) H02H 7/12 (2006.01) H02M 1/092 (2006.01) H03K 17/08 (2006.01) H03K 17/0812 (2006.01)
Patent
CA 1299651
Abstract of the Disclosure A gate signal generator comprises U- and X-phase set circuits for discriminating, after the conduction period of every cycle, whether OFF time intervals of U- and X-phase thyristors are greater or smaller than a predetermined value, a reset circuit for detecting that both the U- and X-phase circuits do not provide outputs, a flip-flop set in response to an output from the U- or X-phase set circuit and reset in response to an output from the reset circuit, AND gates for calculating AND products of an output from the flip-flop and U- and X-phase forward voltage signals and for outputting the signals at a start of the forward voltage applica- tion after setting the flip-flop, and OR gates for calculating OR sums of outputs from the AND gates and outputs from normal gate circuits. Gate signals are applied to the thyristors in response to the outputs from the OR gates.
571436
Kabushiki Kaisha Toshiba
Marks & Clerk
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