High-voltage direct-current transformer connected with diode clamping power switch in series
A diode clamping and power switching technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, output power conversion device, etc. Unbalanced voltage, high static voltage and other problems, to achieve the effect of increasing cost and complexity, reducing hardware cost and requiring less
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Embodiment 1
[0026] Embodiment 1: Take 12 diode-clamped power switches connected in series as an example to illustrate.
[0027] like image 3 As shown, a unidirectional diode-clamped power switch series high-voltage DC transformer disclosed in this embodiment includes an input-side DC bus capacitor C in , DC blocking capacitor C 0 , high-frequency transformer Tr, single-phase rectifier bridge REC, output side DC bus capacitor C out and an auxiliary circuit, the auxiliary circuit is divided into an A-way auxiliary circuit and a B-way auxiliary circuit. It also includes two-way parallel single-way topology (A, B), which are respectively A-way topology and B-way topology. The single-way topology (A, B) is used to make the capacitors contained in the topology Balance the voltage between the power switches and balance the voltage between the power switches. At the same time, the single-way topology (A, B) combined with the auxiliary circuit (A, B) can realize the voltage across the power sw...
Embodiment 2
[0032] like Figure 4 As shown, in order to realize the bidirectional transformation of the DC voltage of the DC transformer, this embodiment also discloses a bidirectional diode clamp power switch series high-voltage DC transformer, which includes two bridge arm groups, which are respectively the I-side bridge arm group and the O-side bridge arm group, the single bridge arm group is composed of the above-mentioned unidirectional diode clamp power switch connected in series with the high-voltage DC transformer to remove the high-frequency transformer Tr, single-phase rectifier bridge REC, and DC blocking capacitor C 0 , Input side bus capacitance C in and output side bus capacitance C out And increase the high-frequency transformer TR, the input side bus capacitor C Iin and output side bus capacitance C Oout composition. The I-side bridge arm group and the O-side bridge arm group are connected through a high-frequency transformer TR, and the DC blocking capacitor C I0 One...
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