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US 11,641,103 B2Granted
Power semiconductor switch clamping circuit
AssigneeABB Schweiz AG
InventorsXiaoqing Song, Pietro Cairoli
Life of this patent
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Abstract
A power semiconductor circuit is provided for clamping the voltage across the circuit when a power semiconductor switch is opened (i.e., turned off). The circuit may include a first surge arrester and a first semiconductor switch coupled in parallel with the power semiconductor switch. The first semiconductor switch is coupled in series with the first surge arrester. A second surge arrester may be coupled to the gate of the first semiconductor switch to control current flow through the first semiconductor switch and the first surge arrester.
Claims20
A power semiconductor circuit, comprising:
- a power semiconductor switch;
- a first surge arrester coupled in parallel with the power semiconductor switch;
- a first semiconductor switch coupled in series with the first surge arrester and parallel with the power semiconductor switch;
- and
- a second surge arrester coupled to a gate of the first semiconductor switch and coupled to the first surge arrester;
- wherein a voltage is applied to the gate of the first semiconductor switch through the first surge arrester and the second surge arrester to turn on the first semiconductor switch when the power semiconductor switch is turned off.
3 more elements
Dependencies are inferred from the claim text.