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Judges it is stirring up or instead stirs up, must look the<br />transformer presents to the C4 energy, is occurs clears when the<br />switching valve, when the switching valve shuts down ,On when just electricity, and heavy load, so long as on the C4 voltage<br />is smaller than time Vip-p*N2/N1, C4 clears when the switching valve<br />accepts the charge through D2, belongs is stirring up, when the<br />switching valve shuts down, accepts the charge through D3, by now but<br />used was the primary excitation energ<br />When 轻载, when on the C4 voltage is bigger than Vip-p*N2/N1, C4<br />only can closes when the switching valve accept the charge, belongs<br />instead stirs up.<br />Load current when intermediate quantity, is stirring up with instead<br />stirs up also exists.<br />Above three kind of situations, with the transformer primary<br />inductance quantity, leak the feeling size, the air gap size have the<br />very big relations.<br />So long as dead load suitable, occupies empties compared to can<br />elevate along with the output voltage drops, finally maintains in the<br />certain scope, occupies the spatial 比及 dead load design to be<br />appropriate, is cannot exploding machine.
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