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Current limiting static switch

阅读：415发布：2023-11-30

专利汇可以提供Current limiting static switch专利检索，专利查询，专利分析的服务。并且Disclosed is a bidirectional current limiting static circuit breaker including four power thyristors arranged to form two conducting paths. Each path includes two of the thyristors and a common current limiting inductor. Commutation means are provided to render any fault current carrying power thyristors nonconductive upon command. The current limiting inductor acts to insure that commutation proceeds to a successful conclusion once begun. The breaker also includes means for suppressing commutation induced transients and for protecting nonconducting power thyristors from externally originated voltage surges.，下面是Current limiting static switch专利的具体信息内容。

权利要求

1. For use in a power system including an AC power source and a load, a bidirectional switch for conducting current between the source and the load and for interrupting the flow of such current upon command, said switch comprising: a. first, second, third and fourth thyristors connected to form a bridge circuit having a pair of AC terminals and first and second DC terminals, each of said thyristors including an anode and a cathode, the cathodes of said first and third thyristors being connected in common to said first DC terminal, and the anodes of said second and fourth thyristors being connected in common to said second DC terminal; b. current limiting impedance means connected between said DC terminals, said impedance means together with said first and second thyristors forming a first load current conducting path between said AC terminals, said impedance means together with said third and fourth thyristors forming a second load current conducting path between said AC terminals; c. first energy storage means connected between said first DC terminals and a first point; d. second energy storage means connected between said second DC terminal and a second point; and e. first, second, third, and fourth controlled switch means adapted to be triggered upon command, said first and third switch means being connected to one another between said AC terminals with their juncture comprising said first point, and said second and fourth switch means being connected to one another between said AC terminals with their juncture comprising said second point.

2. The bidirectional switch as specified in claim 1 wherein said current limiting impedance means is an inductor.

3. The bidirectional switch as specified in claim 1 wherein each of said energy storage means is a capacitor.

4. The bidirectional switch as specified in claim 3 wherein said current limiting impedance means is an inductor.

5. The bidirectional switch as specified in claim 3 wherein each of said controlled switch means is a thyristor.

6. A bidirectional switch as specified in claim 1 wherein a surge suppressing circuit is connected between said first and said second points.

7. A bidirectional switch as specified in claim 6 wherein said power system includes means for detecting the presence of a voltage surge at a time when said bridge thyristors are nonconductive and for rendering said controlled switches conductive in response thereto.

8. The bidirectional switch as specified in claim 6 wherein said surge suppressing circuit comprises a unipolarity conducting element in series with an energy dissipating element.

9. Bidirectional switch as specified in claim 8 wherein said unipolarity conducting element is a diode and wherein said energy dissipating element is a resistor.

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Current limiting static switch

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