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US 9,960,698 B2Granted
Reliable AC-DC power converter with high voltage DC link
AssigneeFlex Power Control, Inc.
InventorsJames Michio Nagashima, Gregory Scott Smith
Life of this patent
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Abstract
An AC to DC converter system is provided. The system includes a bidirectional boost converter circuit coupled to an AC input, a high voltage DC link capacitor circuit coupled to the bidirectional boost converter and comprising at least one capacitor, and a DC to DC converter circuit coupled to the high voltage DC link capacitor circuit and a DC input, wherein the at least one capacitor may include a film capacitor.
Claims19
An AC to DC converter system, comprising:
- a single phase AC energy source;
- a DC energy source;
- a bi-directional AC to DC boost converter circuit coupled to the single phase AC energy source and comprising a first plurality of switches rated for 1200V;
- a high voltage intermediate DC link circuit coupled to the bi-directional AC to DC Boost Converter circuit and comprising a plurality of metalized plastic film capacitors connected in parallel;
- and
- an isolated DC to DC converter connected to the high voltage intermediate DC link circuit and comprising:
- a second plurality of switches rated for 1200V;
- a third plurality of switches rated for 1200V and separated from the second plurality of switches by a high frequency transformer;
- and
- a further capacitor connected in parallel with the third plurality of switches and connected to the DC energy source;
- wherein a high voltage intermediate DC link circuit voltage of at least 750V and output power up to 10 KW is employed with the plurality of metalized plastic film capacitors connected in parallel at a capacitance below 1000 μf.
8 more elements
An AC to DC converter system comprising:
- an AC input and a DC input;
- a bidirectional boost converter circuit comprising a first plurality of switches rated for 1200V and coupled to the AC input;
- a high voltage DC link capacitor circuit coupled to the bidirectional boost converter and comprising multiple metalized plastic film capacitors connected in parallel;
- and
- a DC to DC converter circuit coupled to the high voltage DC link capacitor circuit and the DC input and comprising:
- a second plurality of switches rated for 1200V;
- a third plurality of switches rated for 1200V and separated from the second plurality of switches by a high frequency transformer;
- and
- a further capacitor connected in parallel with the third plurality of switches and connected to the DC input;
- wherein a high voltage intermediate DC link circuit voltage of at least 750V and output power up to 10 KW is employed with the multiple metalized plastic film capacitors connected in parallel at a capacitance below 1000 μf.
7 more elements
An AC to DC converter system comprising:
- an AC input and a DC input;
- bidirectional boost converter means coupled to the AC input;
- high voltage DC link capacitor means coupled to the bidirectional boost converter means and comprising multiple metalized plastic film capacitors connected in parallel;
- and
- DC to DC converter means coupled to the high voltage DC link capacitor means and the DC input and comprising:
- first switching means rated at 1200V;
- second switching means rated at 1200V and separated from the first switching means by a high frequency transformer;
- and
- a further capacitor connected in parallel with the second switching means and connected to the DC input;
- wherein a high voltage intermediate DC link capacitor voltage of at least 750V and output power up to 10 KW is employed with the multiple metalized plastic film capacitors connected in parallel having capacitance below 1000 μf.
7 more elements
Dependencies are inferred from the claim text.