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Starting circuit for push-pull chopper with unijunction transistor - applies RC circuit start signal to single auxiliary winding on chopper transformer
Starting circuit for push-pull chopper with unijunction transistor - applies RC circuit start signal to single auxiliary winding on chopper transformer
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机译:带单结晶体管的推挽斩波器的启动电路-将RC电路启动信号应用于斩波器变压器上的单个辅助绕组
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摘要
The starting circuit, for a push-pull chopper, starts the chopper oscillating even with slowly rising voltages and therefore requires no second auxiliary winding. The chopper contains a transformer with a feedback winding and a single auxiliary winding that applies the starting signal to the chopper transistors. The d.c. supply is voltage stabilised and applied via an RC circuit to a unijunction transistor. The transistor produces the starting signal which is amplified and applied to the auxiliary winding. After the chopper has begun to oscillate, a rectangular waveform is induced in the auxiliary winding. This waveform is rectified and applied to a transistor which short circuits the RC circuit's capacitor -- the starting signal then stops.
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