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US 2018/0091137 A1Published application
Auxiliary commutated silicon-controlled rectifier circuit methods and systems
AssigneeRockwell Automation Technologies, Inc.
InventorRobert S. Schneider
Life of this patent
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Abstract
A device includes a first silicon-controlled rectifier (SCR), a second SCR connected in anti-parallel with the first SCR, and a commutation module. The commutation module is configured to apply a reverse bias voltage to the first SCR or the second SCR to turn off the first SCR or the second SCR. The device further includes a voltage clamp configured to dissipate energy when the first SCR or the second SCR are turned off. The voltage clamp is charged as one of the first SCR or the second SCR are powered on.
Claims19
A device comprising:
- a first silicon-controlled rectifier (SCR);
- a second SCR connected in anti-parallel with the first SCR;
- a commutation module, wherein the commutation module is configured to apply a reverse bias voltage to the first SCR or the second SCR to turn off the first SCR or the second SCR;
- and
- a voltage clamp configured to dissipate energy when the first SCR or the second SCR are turned off, wherein the voltage clamp is charged as one of the first SCR or the second SCR are powered on.
2 more elements
A method comprising:
- connecting a first silicon-controlled rectifier (SCR), a second SCR, and a commutation module in parallel;
- connecting a load to an operating signal;
- passing the operating signal through the SCR to the load, wherein the voltage clamp is charged as one of the first SCR or the second SCR are powered on;
- applying, by the commutation module, a reverse bias voltage to the first SCR to turn off the first SCR;
- and
- dissipating energy with a voltage clamp when the first SCR or the second SCR is turned off.
3 more elements
Dependencies are inferred from the claim text.