SU613488A1 - Current flat-topped pulse generator - Google Patents

Description

(54) PULSE CURRENT GENERATOR WITH FLAT PEAK

whether there is 8-W and uncontrolled valve 11, and in -Znodoy or cathode. A new group of creeping valves having a valve // in series with a controlled valve / About the same group Switching 6 turned on (Fig. 1).

The generator of current imulses with a flat top | is as follows.

In the initial state, the capacitor 4 is charged up to the voltage Un. In the maternity of time-and / o (Fig. 2), block 5 includes valves 8 and 10 of bridge 2, after which the sum of the voltages of source 1 and cooling equipment 4 (fitting 26) is applied to load 3. When this is 1M, a load is flowing through load 3 that changes at the interval / o - i along a sinusoid (Fig. 2a). At time t, the current in load 3 reaches its maximum, and the capacitor 4 (discharges (fng. 2 V) and turns on valve 11, to which the direct voltage is applied. Direct voltage. After switching on the valve // to the source / load 3 and is connected via valves 8 and 11, and the controller 4 is recharged until the reverse is achieved with the energy of the chokes 6, at its peak when the current pulse is fronted.

| Wired "chi | on inductance of chokes 6 is selected so as to provide recharge of capacitor 4 to the level required for switching the valve 8 by turning on valve 9. The recharge current of capacitor 4 in the time interval t - t flows through valve 10 towards valve //. After sherezar and at the moment of aremein tz, the valve 10 is turned off by reverse charging; M of the capacitor 4, butt, Wo: vaeMYM to it through 1 fan //. At the time interval ti - t and up to time point / 3, a lokska pulse width in load 5 is formed under the action of the source / (Fig. 2a). At the time of the drift / s, block 5 outputs a triggering signal to valve 9, which turns on and off valve 8 inversely 1M voltage of capacitor 4. At the same time, inductive load 3 is connected to source 7 through valves 9 and // and capacitor 4. In the time interval tz - t (Fig. 2e), the capacitor 4 is discharged through the load 3 n after iMOMCHTa time t is recharged with the energy of inductive Hairpy3Kn 3 and source 7 to the original voltage.

The process of charging the capacitor 4 ends in -MOiMeHT time / s, corresponding to the absence of current in the load 3. At the time: T unit 5 outputs the triggering signals to the valves 8 and 9, and the generator cycle psvtor. is.

Such a generator provides current pulses with a flat top of high accuracy and almost unlimited duration.

F o r, m in l and invention

Claims (2)

1. A flat-topped current pulse generator containing a power source, a four-valve bridge, in the diagonal between which, between the points of connection of one-piece electrical modules, an inductive load is switched on, and a diagonal between the points of connection of the opposite electrodes includes a storage capacitor and a control unit for the bridge valves, characterized in that, in order to increase the accuracy and durability and holding of a flat top of the current pulses, a switching choke and an additional power source are introduced into it,; Power supply is connected in series with oppositely charged electrodes soedineinyMI rectifiers. 2. The generator according to claim 1, starting with the fact that the four-yeny bridge contains three controllable and one uncontrollable valves, and in the anode or cathode group of valves that have an uncontrollable valve, in series with the controllable The gate of the same group switched commuting choke. The source of information taken into consideration during examination: 1. VV Ivashin and EG Furman. Formation of Magnetic Fields with a complex law of their variation in time. - “Proceedings of INP EA at TPI, higher. 2, Atomizdat, 1972, p. 48, fig. 2