Transient clamping circuitry for voltage converter
First Claim
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1. A voltage converter, comprising:
- a rectifier circuit;
an output inductor and an output capacitor coupled to the rectifier circuit;
a clamp circuit having;
a clamping diode and a clamping capacitor coupled in a serial combination with the serial combination coupled in parallel with the output inductor;
a recovery inductor coupled to the output capacitor; and
a switch configured to selectively couple and decouple the recovery inductor in parallel with the clamping capacitor;
wherein the recovery inductor is configured to discharge current to the output capacitor through a current path bypassing the switch.
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Abstract
Systems and methods of operating a voltage converter are provided. The converter includes an output inductor and an output capacitor coupled to a rectifier circuit. The converter also includes a clamp circuit having a clamping diode and a clamping capacitor coupled in series, with the serial combination in parallel with the output inductor. The clamp circuit can also include a recovery inductor coupled to the output capacitor, and a switch configured to selectively couple and decouple the recovery inductor in parallel with the clamping capacitor.
92 Citations
11 Claims
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1. A voltage converter, comprising:
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a rectifier circuit; an output inductor and an output capacitor coupled to the rectifier circuit; a clamp circuit having; a clamping diode and a clamping capacitor coupled in a serial combination with the serial combination coupled in parallel with the output inductor; a recovery inductor coupled to the output capacitor; and a switch configured to selectively couple and decouple the recovery inductor in parallel with the clamping capacitor; wherein the recovery inductor is configured to discharge current to the output capacitor through a current path bypassing the switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An uninterruptable power supply, comprising:
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an AC power input; a battery; an output configured to provide power from at least one of the AC power input and the battery to an uninterruptable power supply output; a DC/DC converter coupled to the battery, wherein the DC/DC converter includes; a rectifier circuit; an output inductor and an output capacitor coupled to the rectifier circuit; and a clamp circuit having; a clamping diode and a clamping capacitor coupled in a serial combination with the serial combination coupled in parallel with the output inductor; a recovery inductor coupled to the output capacitor; and a switch configured to selectively couple and decouple the recovery inductor in parallel with the clamping capacitor; wherein the recovery inductor is configured to discharge current to the output capacitor through a current path bypassing the switch.
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Specification