| 摘要 |
The circuit comprises resonant circuits including an inductive heating coil in each. A capacitor is connected in series with the coil, and an on-off switching device connected in parallel with the capacitor. The circuit further comprises trigger circuits for detecting a resonant current through the coil and for generating trigger pulses respectively. A device produces control pulse signals according to operating order conditions of individual operating switches for the resonant circuits. The trigger pulses are produced by a logic device at a common frequency even if the operating switches are operated.
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