Pulsed power supply system专利检索-倍增极电子零件及设备专利检索查询-专利查询网

Pulsed power supply system

阅读：240发布：2023-03-24

专利汇可以提供Pulsed power supply system专利检索，专利查询，专利分析的服务。并且A DC source is coupled into a unijunction transistor relaxation oscillator with the output of the oscillator driving the gate of an SCR. The voltage pulse appearing on the anode of the SCR is transformer coupled into a voltage multiplier circuit, the output of which is connected between the ion source anode and cathode of an accelerator tube used for producing fast neutrons from the D-T reaction. Because SCR''s are subject to latch-up, the circuit also has a transistor connected between the cathode of the SCR and ground with the base of the transistor being transformer coupled through a capacitor back to the anode of the SCR. As long as the SCR is operating normally, a portion of the negative pulse developed on the SCR anode is inverted and coupled to the base of the transistor, thus turning the transistor on and allowing the SCR current to flow to ground through the very small saturation resistance of the transistor. In the event of latch-up, the SCR no longer produces pulses, thereby removing the drive from the transistor leaving the transistor in a non-conducting state. Thus, a high impedance is presented between the cathode of the SCR and ground. The SCR will then recover to its non-conducting state. There is sufficient impedance on the SCR cathode, however, that it will try to turn on again from the gate drive supplied by the unijunction relaxation oscillator and thus a pulse will be produced to drive the transistor into conduction and the circuit will begin to operate in a normal mode.，下面是Pulsed power supply system专利的具体信息内容。

权利要求

1. A circuit for supplying high voltage pulses, comprising: a source of low voltage pulses; an SCR susceptible to latch-up having an anode, a cathode and a gate; a DC voltage source connected to said anode; means to couple said low voltage pulses to said gate to thus generate high voltage pulses on the anode of said SCR; a transistor having a base, emitter and collector, said collector being connected to said cathode; and means to couple said high voltage pulses from said anode to said base and to block the coupling of the steady-state high voltage condition of said anode to said base to thereby prevent the latch-up of said SCR.

2. In a circuit having an SCR susceptible to latch-up having a gate, an anode and a cathode gated by low voltage pulses to generate high voltage pulses in the anode circuit of said SCR and having an impedance in the cathode circuit of said SCR, the improvement comprising means to vary saId impedance in the cathode circuit of the SCR in a manner functionally related to a high voltage pulse being generated in the anode circuit of the SCR to thereby prevent the latch-up of the SCR.

3. The circuit according to claim 2 wherein said impedance is a transistor having an emitter, a base and a collector.

4. The circuit according to claim 3 wherein said means to vary said impedance comprises the functional coupling of said high voltage pulses into the base of said transistor to thereby saturate said transistor.

5. The circuit according to claim 4 wherein said high voltage pulses are transformer coupled into said transistor base.

6. The circuit according to claim 5 wherein a first capacitor is connected between the collector and emitter of said transistor.

7. The circuit according to claim 6 wherein said transformer coupling includes a transformer having a primary coil and a secondary coil and wherein a second capacitor is connected between the anode of said SCR and the primary coil of the transformer used in coupling said high voltage pulses to said base.

8. In a circuit for pulsing an ion source in an accelerator tube having a given interelectrode capacitance and given current requirements, wherein an SCR susceptible to latch-up having a gate, an anode and a cathode is gated by low voltage pulses to generate high voltage pulses in the anode circuit of said SCR and having an impedance in the cathode circuit of said SCR, the improvement comprising means to vary said impedance in the cathode circuit of the SCR in a manner functionally related to a high voltage pulse being generated in the anode circuit of the SCR to thereby prevent the latch-up of the SCR, a voltage multiplier circuit having a given ripple pulse frequency output, transformer coupling between the anode of said SCR and the input of said voltage multiplier circuit, and means coupling the output of said voltage multiplier circuit to said ion source.

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