A DC/DC converter topology
A topology and converter technology, applied in the direction of converting DC power input to DC power output, instruments, regulating electrical variables, etc., can solve the problem of difficult to achieve soft switching, power grid voltage and frequency, power characteristics cannot be accurately controlled, and power dispatch control effects. drop etc.
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[0025] Its specific implementation is as follows.
[0026] Analyze the working principle of the DC / DC converter in this scheme, in order to image 3 The original side of the equivalent circuit diagram is a reference, and the voltage and current waveforms of the DC / DC converter in one cycle are as follows Figure 4 As shown, the converter repeats the above working mode in one cycle, so it can be divided into t in one working cycle 1 -t 20 Twenty state intervals, including:
[0027] t 0 -t 1 (t 0 refers to the cycle start time point), this state is immediately following the t of the previous stable state 20 , S 1 , S 4 , S 5 , S 8 conduction, D 9 、D 12 conduction. v cr6 =v cr7 =U 2, the voltages applied to the three terminals are all positive voltages, v 2 side duty cycle less than 1, i r1 decreases linearly, i r2 and i r3 increases linearly.
[0028] t 1 -t 2 , S 5 Disconnect, C r5 、C r6 with T r resonance, C r5 Charge, C r6 discharge, v cr5 increa...
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