[특허]High-voltage solid-state switching devices

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IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F41B-006/00
출원번호	US-0724177 (1991-07-01)
발명자 / 주소	Bowles Edward E. (San Diego CA)
출원인 / 주소	General Atomics (San Diego CA 02)
인용정보	피인용 횟수 : 43 인용 특허 : 0

초록 ▼

High-voltage, solid-state switches that are capable of interrupting current, offer relatively low on-state losses (low forward voltage drop) and provide for high current densities. Low-voltage transistors and silicon-controlled rectifiers are employed to achieve low power losses at high current densities. One embodiment of the present invention relates to a solid-state switch for controlling a source of direct current. The switch includes four switching elements. Each element has a first terminal, a second terminal and a control signal input terminal. The switching elements provide a high resistance to the flow of electrical current in response to a first control signal. A second control signal causes the switching elements to offer a low resistance to the flow of electrical current. The first and second switching elements are connected in series, as are the third and fourth switching elements. The series combination of the first and second switching elements is then connected in parallel with the series combination of the third and fourth switching elements. A second embodiment of the invention includes three switching elements similar to the elements of the first embodiment, but with the first and the second switching elements wired in series, and with the third switching element being connected in parallel with the series combination of the first and second switching elements. The combination of switching elements allow a silicon-controlled rectifier to be used as a turn-off switch.

대표청구항 ▼

A solid-state switch for controlling a source of direct current, said switch comprising: first, second, third, and fourth switching elements, each of said switching elements having a first terminal, a second terminal, and a control signal input terminal; said first switching element providing a low resistance to the flow of electrical current between said first and said second terminals in response to a first control signal input to said control signal input terminal; said first switching element providing a high resistance to the flow of electrical current between said first and said second terminals in response to a second control signal input to said control signal input terminal provided that the flow of said electrical current between said first and said second terminals is below a minimum threshold value when said second control signal is input to said control signal input terminal; said second switching element providing a low resistance to the flow of electrical current between said first and said second terminals in response to a third control signal input to said control signal input terminal; said second switching element providing a high resistance to the flow of electrical current between said first and said second terminals in response to a fourth control signal input to said control signal input terminal; said third switching element providing a low resistance to the flow of electrical current between said first and said second terminals in response to a fifth control signal input to said control signal input terminal; said third switching element providing a high resistance to the flow of electrical current, between said first and said second terminals in response to a sixth control signal input to said control signal input terminal provided that the flow of said electrical current between said first and said second terminals is below a minimum threshold value when said second control signal is input to said control signal input terminal; said fourth switching element providing a low resistance to the flow of electrical current between said first and said second terminals in response to a seventh control signal input to said control signal input terminal; said fourth switching element providing a high resistance to the flow of electrical current between said first and said second terminals in response to an eighth control signal input to said control signal input terminal; said first and said second switching elements being connected in series, and said third and fourth switching elements being connected in series, and said series combination of said first and said second switching elements being connected in parallel with the series combination of said third and said fourth switching elements.

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