Automatic reset device and method suitable for pulse power supply magnetic switch
A technology of pulse power supply and magnetic switch, applied in the field of power electronics, can solve problems such as the energy transmission efficiency of magnetic compression pulse power supply, and achieve the effect of improving work efficiency, high voltage transmission efficiency, and improving market competitiveness.
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Embodiment 1
[0042] The present invention is applicable to the automatic magnetic reset device of pulse power supply magnetic switch, the topological circuit such as figure 1 shown, including the pulse transformer T 0 , Pulse generation unit, magnetic compression unit and magnetic reset unit.
[0043] The magnetic reset unit includes: magnetic switch S 0 Secondary side, reset switch tube Q 21 , reset capacitor C f , the discharge switch tube Q 22 , discharge inductance L 2 and discharge resistor R 2 .
[0044] Pulse generating unit (device): resonant switching tube Q11 , boost rectifier unit, clamping diode D cl , the clamp resistor R cl , the clamp capacitor C cl , resonant capacitor C c ;
[0045] The magnetic compression unit includes: high voltage capacitor C 0 , magnetic switch S 0 The primary side and the reactor Z 0 .
[0046] Pulse transformer T 0 The primary side is connected to the pulse generator, and the secondary side is connected in parallel with the high-volt...
Embodiment 2
[0048] The magnetic reset unit of the present invention can also adopt the form of multiple units.
[0049] Such as figure 2 As shown, the difference between this example and Example 1 is that a multi-stage magnetic reset method is used to achieve a high compression ratio of the pulse width. This example includes n (n takes 2, 3, 4...) magnetic compression units, And n magnetic reset units, one end of the primary side of each group of magnetic switches is grounded through the previous stage capacitor, the other end is connected to the next stage capacitor and the next stage magnetic switch, and is grounded through the latter stage capacitor. Each group of magnetic compression units is equipped with a corresponding independent magnetic reset unit. Compared with Example 1, each additional level of magnetic compression unit needs to sample the previous level and the current level of the magnetic switch for comparison and form a feedback signal to control each level. The control...
Embodiment 3
[0051] The present invention is based on the magnetic reset method of the pulse power supply magnetic switch of the magnetic reset device of Embodiment 1. When the resonant switch tube is turned on Q 11 When, due to the resonance effect in the circuit, the resonant capacitor C 0 High-voltage pulses are generated on the transformer, and the boost rectifier unit on the primary side of the transformer provides energy for it.
[0052] The control process of this method comprises the following steps: image 3 Shown:
[0053] 1) Initialization parameters: reset capacitor voltage U Cf , switch Q 21 The turn-on time T 21 , ΔT max , U Cfmax , K 1 , K 2 Each parameter, where U Cf ,T 21 The initial value can be determined according to the magnetic switch parameters of the pulse power supply, ΔT max Determined according to the resonance period of the pulse power supply, U Cfmax It can be determined according to the actual withstand voltage value of the reset capacitor, K 1 , ...
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