Method and control circuit for operating a power converter
AssigneeInfineon Technologies Austria AG
InventorsAlex Pacini, Gerald J. Deboy, Matthias J. Kasper, Kennith K Leong
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Abstract
Disclosed is a method and apparatus. The method comprises generating an alternating voltage (Vmn) based on three alternating input voltages (Va, Vb, Vc) received at an input (a, b, c) of a power converter, wherein generating the alternating intermediate voltage (Vmn) comprises controlling waveforms of three input currents (Ia, Ib, Ic) received at the input (a, b, c) dependent on waveforms of the three alternating input voltages (Va, Vb, Vc).
Claims14
A method, comprising:
- generating an alternating intermediate voltage based on three alternating input voltages received at an input of a power converter;
- wherein generating the alternating intermediate voltage comprises controlling waveforms of three input currents received at the input dependent on waveforms of the three alternating input voltages;
- wherein generating the alternating intermediate voltage and controlling the waveforms of the three input currents comprises:
- detecting a highest line-to-line voltage, a second highest line-to-line voltage based on the three alternating input voltages;
- generating the alternating intermediate voltage based on the highest line-to-line voltage and the second highest line-to-line voltage;
- wherein generating the alternating intermediate voltage comprises generating the alternating intermediate voltage such that in each period of the alternating intermediate voltage a magnitude of the alternating intermediate voltage at least approximately equals a magnitude of a highest line-to-line voltage for a first time duration and at least approximately equals a magnitude of the second highest line-to-line voltage for a second time duration;
- wherein the method further includes detecting a highest input voltage based on the three alternating input voltages and adjusting the first time duration based on the detected highest input voltage and an associated first input current.
A control circuit configured to control operation of a switching circuit power converter to generate, an alternating voltage based on three alternating input voltages received at an input of the switching circuit power converter and to control waveforms of three input currents received at the input dependent on waveforms of the three alternating input voltages;
- wherein, to control operation of the switching circuit power converter to generate the alternating voltage and control the waveforms of the input currents, the control circuit is configured to:
- detect a highest line-to-line voltage, a second highest line-to-line voltage, and a highest input voltage based on several input voltages received at an input of the switching circuit power converter;
- control the switching circuit power converter to generate the alternating voltage based on the highest line-to-line voltage and the second highest line-to-line voltage such that in each period of the alternating intermediate voltage a magnitude of the alternating voltage at least approximately equals the magnitude of highest line-to-line voltage for a first time duration and at least approximately equals the magnitude of the second highest line-to-line voltage for a second time duration, and
- wherein the control circuit is further configured to adjust the first time duration based on the detected highest input voltage and an associated first input current.
A method, comprising:
- generating an alternating intermediate voltage based on three alternating input voltages received at an input of a power converter;
- wherein generating the alternating intermediate voltage comprises controlling waveforms of three input currents received at the input dependent on waveforms of the three alternating input voltages;
- wherein generating the alternating intermediate voltage and controlling the waveforms of the three input currents comprises:
- detecting a highest line-to-line voltage, a second highest line-to-line voltage based on the three alternating input voltages;
- and
- generating the alternating intermediate voltage based on the highest line-to-line voltage and the second highest line-to-line voltage.
Dependencies are inferred from the claim text.