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US 12,763,675 B2Granted
Power conversion circuit and electronic device
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsLiqiong Yi, Zezhou Yang, Dibin Zhou
Life of this patent
Estimating the term…
Abstract
A power conversion circuit and an electronic device. After circuit units that each are in a resonant circuit of the power conversion circuit, and that each include a resonant capacitor and/or a resonant inductor, are connected in series in a triangle connection. When it can be ensured that the circuit units connected in series in the triangle connection and the circuit units connected in series in a star connection relationship provide a same resonant frequency, a capacitance value of the resonant capacitor is reduced, and/or current stress of the resonant capacitor and/or current stress of the resonant inductor are/is reduced.
Claims20
A power conversion circuit, comprising:
- a switch conversion circuit;
- three resonant circuits;
- a three-phase transformer;
- a rectifier circuit;
- and
- a filter circuit, wherein the switch conversion circuit, the three resonant circuits, the three-phase transformer, the rectifier circuit, and the filter circuit are sequentially connected, each resonant circuit is disposed between the switch conversion circuit and the three-phase transformer and each resonant circuit comprises:
- a resonant capacitor,
- a resonant inductor, and
- an excitation inductor, wherein
- the excitation inductor and the resonant capacitor in each resonant circuit are connected in series to form a first circuit unit, three first circuit units in the three resonant circuits are connected in series;
- the resonant capacitor, the resonant inductor, and the excitation inductor in each resonant circuit are connected in series to form a second circuit unit, and three second circuit units in the three resonant circuits are connected in series;
- the resonant inductor and the excitation inductor in each resonant circuit are connected in series to form a third circuit unit, and three third circuit units in the three resonant circuits are connected in series;
- the resonant capacitor and the resonant inductor in each resonant circuit are connected in series to form a fourth circuit unit, and either three fourth circuit units in the three resonant circuits are connected in series or resonant inductors in the three resonant circuits are connected in series;
- wherein the three first circuit units, the three second circuit units, the three third circuit units, or the three fourth circuit units that are connected in series form a triangle connection relationship, so that resonant capacitors and/or resonant inductors in the three resonant circuits jointly provide a resonance for each resonant circuit through star-triangle conversion.
11 more elements
An electronic device, comprising:
- a rectifier module,
- a filter module,
- a power factor correction (PFC) module, and
- a power conversion module, wherein the power conversion module comprises a power conversion circuit;
- wherein the power conversion circuit comprises:
- a switch conversion circuit,
- three resonant circuits,
- a three-phase transformer,
- a rectifier circuit, and
- a filter circuit, wherein the switch conversion circuit, the three resonant circuits, the three-phase transformer, the rectifier circuit, and the filter circuit are sequentially connected, each resonant circuit is disposed between the switch conversion circuit and the three-phase transformer and each resonant circuit comprises:
- a resonant capacitor,
- a resonant inductor, and
- an excitation inductor;
- wherein
- the excitation inductor and the resonant capacitor in each resonant circuit are connected in series to form a first circuit unit, and three first circuit units in the three resonant circuits are connected in series;
- the resonant capacitor, the resonant inductor, and the excitation inductor in each resonant circuit are connected in series to form a second circuit unit, and three second circuit units in the three resonant circuits are connected in series;
- the resonant inductor and the excitation inductor in each resonant circuit are connected in series to form a third circuit unit, and three third circuit units in the three resonant circuits are connected in series;
- the resonant capacitor and the resonant inductor in each resonant circuit are connected in series to form a fourth circuit unit, and either three fourth circuit units in the three resonant circuits are connected in series or resonant inductors in the three resonant circuits are connected in series;
- wherein the three first circuit units, the three second circuit units, the three third circuit units, or the three fourth circuit units that are connected in series form a triangle connection relationship, so that resonant capacitors and/or resonant inductors in the three resonant circuits jointly provide a resonance for each resonant circuit through star-triangle conversion;
- and
- wherein the rectifier module is configured to rectify an alternating current input into the electronic device to obtain a direct current, the filter module is configured to filter the direct current processed by the rectifier module, the PFC module is configured to perform power factor correction on the direct current processed by the filter module, and the power conversion module is configured to perform voltage conversion on the direct current processed by the PFC module and output the direct current.
18 more elements
Dependencies are inferred from the claim text.