Power electronic device
AssigneeDanfoss Power Electronics A/S
InventorsAnsgar Nielsen, Henrik Rosendal Andersen, Steen Hornsleth
Life of this patent
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Abstract
A power electronic device includes an input which is connected to an over-current-protection device arrangement and a DC-link, wherein the DC-link includes a series connection of at least two DC-link capacitors. In such a power electronic device the risk of a fire hazard should be minimized. To this end fault detecting element(s) are provided detecting an imbalance between the DC-link capacitors or an overload of at least one of the DC-link capacitors, wherein the fault detecting element(s) control maximum current inducing element(s) connected to the DC-link.
Claims20
A power electronic device comprising an input which is connected to an over-current-protection device arrangement and a DC-link, wherein the DC-link comprises a series connection of at least two DC-link capacitors, wherein fault detecting means are provided detecting an imbalance between the DC-link capacitors or an overload of at least one of the DC-link capacitors, wherein the fault detecting means control maximum current inducing means connected to the DC-link, wherein the over-current-protection device is configured to become activated after the fault detecting means controls the maximum current inducing means to induce a sufficient current flow in the power electronic device, wherein the over-current-protection device interrupts power flowing through the input when the over-current-protection device is activated, and wherein the input is configured such that during operation of the power electronic device, power flows through the input, when not interrupted, before flowing into the DC-link.
Dependencies are inferred from the claim text.