US 2025/0062677 A1Published application

Power conversion device

AssigneeShanghai Metapwr Electronics Co., Ltd

InventorJianhong ZENG

Life of this patent

Estimating the term…

Loading patent…

Abstract

A power conversion device is provided. The power conversion device is applied to a circuit topology and layout of the six-switch flying capacitor voltage reduction type conversion circuit which is applied to the intermediate bus converter. The layout of the transformer and the inductor is provided, so that the parasitic resistance of the winding in the magnetic core assembly is minimum. An auxiliary switch and an auxiliary winding are additionally arranged on the six-switch flying capacitor voltage reduction type conversion circuit, and the auxiliary switch and the auxiliary winding are used for providing enough energy for the output end when the input voltage is lower than four times of the output voltage. A switch layout is provided to reduce parasitic parameters and power losses of a transformer winding AC loop, and parasitic parameters and power losses on the switch bridge arm path.

Claims26

Dependent claims

A power conversion device, comprising:

a circuit substrate, an upper switch, a middle switch, a lower switch, a first flying capacitor, an input capacitor, an output capacitor and a transformer,
wherein the circuit substrate comprises a first surface and a second surface opposite to each other, two transformer side column holes, a transformer middle column hole, a lower switch area, a first flying capacitor area, a first upper middle switch area and an output area,
wherein the lower switch area, the first flying capacitor area, the first upper middle switch area and the output area are arranged on the first surface of the circuit substrate,
wherein the two transformer side column holes and the transformer middle column hole penetrate through the first surface and the second surface, and respectively used for side columns of the transformer and a middle column of the transformer to penetrate through, wherein a transformer winding area is arranged between each of the two transformer side column holes and the transformer middle column hole, a winding of the transformer penetrates through the transformer winding area, and the transformer winding area comprises a first side and a second side opposite to each other,
wherein the lower switch area is arranged adjacent to the first side of the transformer winding area, the output area is arranged adjacent to the second side of the transformer winding area, the lower switch is arranged in the lower switch area, and the output capacitor is arranged in the output area,
wherein the first flying capacitor is arranged in the first flying capacitor area, and the lower switch area is arranged between the first flying capacitor area and the transformer winding area,
wherein the upper switch and the middle switch are arranged in the first upper middle switch area, and the first upper middle switch area is arranged adjacent to the first flying capacitor area and the lower switch area.

4 more elements

A power conversion device, comprising:

an input positive terminal, an input negative terminal, an output positive terminal and an output negative terminal, wherein the input negative terminal is electrically connected with the output negative terminal,
wherein the power conversion device further comprises a first bridge arm, a second bridge arm, two flying capacitors, an output capacitor, two transformer windings, an output inductor, an auxiliary switch and an auxiliary winding, wherein the first bridge arm and the second bridge arm are electrically connected between the input positive terminal and the input negative terminal in parallel, the first bridge arm and the second bridge arm both comprise an upper switch, a middle switch and a lower switch, the upper switch and the middle switch in each of the first bridge arm and the second bridge arm are electrically connected to an upper node, and the middle switch and the lower switch in each of the first bridge arm and the second bridge arm are electrically connected to a lower node, wherein one end of each of the two flying capacitors is electrically connected with one of the upper nodes, and the other end of each of the two flying capacitors is electrically connected with one of the lower nodes, wherein a second end of the two transformer windings is electrically connected with one end of the output inductor, a first end of the two transformer windings is electrically connected with the other one of the lower nodes, and the other end of the output inductor is electrically connected with the output positive terminal;
the output capacitor is bridged between the output positive terminal and the output negative terminal,
wherein one end of the auxiliary winding is electrically connected with the input positive terminal, the other end of the auxiliary winding is electrically connected with a drain electrode of the auxiliary switch, and a source electrode of the auxiliary switch is electrically connected with the output positive terminal.

1 more element

A power conversion device, comprising:

an input positive terminal, an input negative terminal, an output positive terminal and an output negative terminal, wherein the input negative terminal is electrically connected with the output negative terminal,
wherein the power conversion device further comprises a first bridge arm and a second bridge arm, wherein the first bridge arm and the second bridge arm are electrically connected between the input positive terminal and the input negative terminal in parallel, the first bridge arm and the second bridge arm both comprise an upper switch, a middle switch and a lower switch, wherein the upper switch and the middle switch in each of the first bridge arm and the second bridge arm are electrically connected to an upper node, and the middle switch and the lower switch in each of the first bridge arm and the second bridge arm are electrically connected to the lower node,
wherein the power conversion device further comprises a first driving unit, a second driving unit, a third driving unit and four control signals, wherein each of the first driving unit, the second driving unit, and the third driving unit receives two corresponding control signals in four control signals, wherein the first driving unit is used for driving the upper switch of the first bridge arm and the upper switch of the second bridge arm to be turned on and turned off, the second driving unit is used for driving the middle switch and the lower switch of the first bridge arm to be turned on and turned off, and the third driving unit is used for driving the middle switch and the lower switch of the second bridge arm to be turned on and turned off.

A power conversion device, comprising:

an input positive terminal, an input negative terminal, an output positive terminal and an output negative terminal, wherein the input negative terminal is electrically connected with the output negative terminal,
wherein the power conversion device further comprises a first bridge arm, a second bridge arm, two flying capacitors, an output capacitor, two transformer windings, an output inductor, two input inductors, two input capacitors and two auxiliary switches, wherein the first bridge arm and the second bridge arm are electrically connected between the input positive terminal and the input negative terminal in parallel, the first bridge arm and the second bridge arm both comprise an upper switch, a middle switch and a lower switch, wherein the upper switch and the middle switch in each of the first bridge arm and the second bridge arm are electrically connected to an upper node, and the middle switch and the lower switch in each of the first bridge arm and the second bridge arm are electrically connected to one of the lower nodes, wherein one end of each of the two flying capacitors is electrically connected with one of the upper nodes of one bridge arm, and the other end of each of the two flying capacitors is electrically connected with the other one of the lower nodes, wherein a second end of the two transformer windings is electrically connected with one end of an output inductor, a first end of the two transformer windings is electrically connected with one of the lower nodes, and the other end of the output inductor is electrically connected with the output positive terminal, wherein the output capacitor is bridged between the output positive terminal and the output negative terminal, wherein each of the two input capacitors is bridged at two ends of the first bridge arm and at two ends of the second bridge arm, wherein one end of each of the two input inductors is electrically connected with the input positive terminal, and the other end of each of the two input inductors is electrically connected with an upper end of the first bridge arm and with an upper end of the second bridge arm,
wherein the two auxiliary switches are connected in series between an upper end of the first bridge arm and an upper end of the second bridge arm, wherein source electrodes of the two auxiliary switches are short-circuited or drain electrodes of the two auxiliary switches are short-circuited.

Dependencies are inferred from the claim text.

Facts

Application: 18/798,857Filed 9 Aug 2024
Priority: CN 202311026795.915 Aug 2023
Published: 20 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H02M 1/0095
Details of apparatus for conversion: hybrid converter topologies, e.g. NPC mixed with flying capacitor, thyristor converter mixed with MMC or…
H02M 3/003
Conversion of DC power input into DC power output: constructional details, e.g. physical layout, assembly, wiring or busbar connections
H02M 1/0064
Details of apparatus for conversion: magnetic structures combining different functions, e.g. storage, filtering or transformation
H02M 3/1586
With a plurality of power processing stages connected in parallel: switched with a phase shift, i.e. interleaved