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US 9,806,601 B2Granted
Boost converter and method
AssigneeFuturewei Technologies, Inc.
InventorDianbo Fu
Life of this patent
Estimating the term…
Abstract
A converter comprises a first switch, a second switch, a first blocking device and a second blocking device connected in series between two terminals of an output capacitor, an inductor coupled between a dc input source and a common node of the second switch and the first blocking device and a capacitor coupled between a common node of the first switch and the second switch, and a common node of the first blocking device and the second blocking device, wherein a voltage across the capacitor is configured to be adjustable through adjusting duty cycles of the first switch and the second switch.
Claims17
A converter comprising:
- a first switch, a second switch and a first blocking device connected in series between a first terminal of an output capacitor and a dc ground, the output capacitor being connected to an input of an inverter;
- a second blocking device is connected between the dc ground and a second terminal of the output capacitor;
- an inductor coupled between a positive terminal of a dc input source and a common node of the second switch and the first blocking device, wherein a negative terminal of the dc input source is connected to the dc ground;
- and
- a capacitor coupled between a common node of the first switch and the second switch, and the first terminal of the output capacitor, wherein a voltage across the capacitor is configured to be adjustable through adjusting duty cycles of the first switch and the second switch, and wherein a voltage stress of the first switch is different from a voltage stress of the second switch when the first switch and the second switch have a same duty cycle.
2 more elements
A system comprising:
- a converter having a first input connected to a positive terminal of a dc output of a solar panel and a second input connected to a negative terminal of the dc output of the solar panel, wherein the converter comprises:
- a first switch, a second switch and a first blocking device connected in series, wherein the first blocking device is connected to a first terminal of an output capacitor, wherein the output capacitor is connected to an input of an inverter, and wherein the output capacitor comprises a first output capacitor and a second output capacitor connected in series;
- a second blocking device is connected to a second terminal of the output capacitor;
- a capacitor coupled between a common node of the first switch and the second switch, and the first terminal of the output capacitor, wherein a voltage stress of the first switch is different from a voltage stress during steady operation;
- a first inductor is connected between the positive terminal of the dc output of the solar panel and a common node of the second switch and the first blocking device;
- and
- a second inductor is connected between the negative terminal of the dc output of the solar panel and a common node of the first switch and the second blocking device;
- and
- the inverter connected to two output terminals of the converter, wherein the inverter comprises a first inverter switch, a second inverter switch connected in series with the first inverter switch and a freewheeling apparatus connected between a common node of the first inverter switch and the second inverter switch, and a common node of the first output capacitor and the second output capacitor.
6 more elements
A method comprising:
- providing a converter comprising:
- a first switch, a second switch and a first blocking device connected in series between a first terminal of an output capacitor and a dc ground, the output capacitor being connected to an input of an inverter;
- a second blocking device is connected between the dc ground and a second terminal of the output capacitor;
- an inductor coupled between a dc input source and a common node of the second switch and the first blocking device;
- and
- a capacitor coupled between a common node of the first switch and the second switch, and the first terminal of the output capacitor, wherein a voltage stress of the first switch is greater than a voltage stress of the second switch when the first switch and the second switch have a same duty cycle;
- detecting a voltage across the capacitor;
- increasing a duty cycle of the second switch when the voltage across the capacitor is greater than a predetermined threshold;
- and
- increasing a duty cycle of the first switch when the predetermined threshold is greater than the voltage across the capacitor.
7 more elements
Dependencies are inferred from the claim text.