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US 10,122,276 B2Granted
Method for operating a power converter circuit and power converter circuit
AssigneeInfineon Technologies Austria AG
InventorsGerald Deboy, Kennith Kin Leong
Life of this patent
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Abstract
In accordance with an embodiment, a method includes converting power by a power converter circuit having a plurality of converter cells coupled to a supply circuit. Converting the power includes a plurality of successive activation sequences and, in each activation sequence, activating at least some of the plurality of converter cells at an activation frequency. The activation frequency is dependent on at least one of an output power and an output current of the power converter circuit.
Claims14
A method comprising:
- converting power by a power converter circuit that comprises a plurality of converter cells coupled to a supply circuit, the supply circuit comprising a first plurality of capacitors connected in series between input nodes of the power converter circuit, wherein converting power comprises successively activating each converter cell of the plurality of converter cells in a drive cycle at an activation frequency, wherein each converter cell of the plurality of converter cells is activated one at a time;
- and
- adjusting the activation frequency dependent on at least one of an output power or an output current of the power converter circuit, wherein adjusting the activation frequency comprises changing a pause period between at least two of the successive activations of the plurality of converter cells in the drive cycle, and none of the converter cells of the plurality of converter cells are activated during the pause period, wherein
- changing the pause period comprises changing a number of predetermined time periods T between each successive activation in which none of the plurality of converter cells is active, and
- activating each converter cell of the plurality of converter cells comprises activating each of converter cell of the plurality of converter cells for the predetermined time period T.
2 more elements
A power converter circuit, comprising:
- a plurality of converter cells coupled to a supply circuit, the supply circuit comprising a first plurality of capacitors connected in series between input nodes of the power converter circuit;
- and
- a control circuit, wherein the control circuit is configured to
- successively activate each converter cell of the plurality of converter cells in a drive cycle at an activation frequency, wherein each converter cell of the plurality of converter cells is activated one at a time,
- adjust the activation frequency dependent on at least one of an output power or an output current of the power converter circuit, wherein
- the activation frequency is adjusted by changing a pause period between at least two of the successive activations of the plurality of converter cells in the drive cycle,
- none of the converter cells of the plurality of converter cells are activated during the pause period,
- the control circuit is configured to change the pause period by changing a number of predetermined time periods T between each successive activation in which none of the plurality of converter cells is active, and
- the control circuit is configured to activate each converter cell of the plurality of converter cells for the predetermined time period T.
6 more elements
Dependencies are inferred from the claim text.