![]() ![]() ![]() ![]() Since the transformer winding polarity is shown reversed, the secondary voltage is negative, and no secondary current can flow since the diode is reverse biased. When the switch Q is on, essentially the entire source voltage Vg appears across the primary winding and magnetizing inductance. This also shows why transformers don't work at DC: the magnetizing inductance will short out. This is the basic schematic for the flyback converter. I have exploded out the magnetizing inductance of the transformer as I find it helps understanding the current flow in transformer. This section will give an overview of the theory of operation of the flyback converter, and the project logs will cover the design and build of the circuit. It can step voltage up or down, and can be built with and without isolation, and usually can be realized with low parts count. The flyback converter finds many applications in DC-DC and rectifier designs. ![]()
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