As the Q2 is turned on, the voltage of winding n2 is U2 =Uc2. And as the winding n1 is coupled with n2 closely, hence
the voltage of n1 is U1 =U2. Thus U1>Uc1 is available. In this case, Q1 is turned on in reverse, the reverse current I1 flows
through the antiparallel diode D1 and winding n1. Q2 is turned on in forward, and the forward current I2 flows through the n2. In accordance with the flow directions of I1 and I2, the Uc1 will be increasing and the Uc2 will be decreasing . Then the
un-equality of Uc1 and Uc2 will be corrected. In fact, UA does not deviate apparently because of voltage auto-equalization
process.
As the Q2 is turned on, the voltage of winding n2 is U2 =Uc2. And as the winding n1 is coupled with n2 closely, hence
the voltage of n1 is U1 =U2. Thus U1>Uc1 is available. In this case, Q1 is turned on in reverse, the reverse current I1 flows
through the antiparallel diode D1 and winding n1. Q2 is turned on in forward, and the forward current I2 flows through the n2. In accordance with the flow directions of I1 and I2, the Uc1 will be increasing and the Uc2 will be decreasing . Then the
un-equality of Uc1 and Uc2 will be corrected. In fact, UA does not deviate apparently because of voltage auto-equalization
process.
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