SU458092A1 - Magnetic pulse generator - Google Patents

Description

one

The invention relates to automation, computing, and radar, and can be used to form powerful short pulses with a high frequency.

A powerful magnetic pulse generator (pulse modulator) is known, which contains a power source, a charging element, a storage capacitor, a key, a correction circuit, a pulse transformer, and a magnetron in the load circuit.

The aim of the invention is to reduce the duration of the decay of the pulses and increase the frequency.

For this, the correction circuit is made as a two-winding droplets, between which ends of the same name are equalizing resistors, and between the opposite ends of a capacitor is connected, spiked by a ballast resistor.

The drawing shows a diagram of the generator.

The magnetic pulse generator contains a power source 1, in parallel with which a charging capacitor 3 is connected via a charging element 2. A switch 4 is connected to a storage capacitor through a pulse transformer 6. A correction winding is connected parallel to the primary winding of a pulse transformer

chain 7. The correction chain 7 contains a choke 8 with two identical working windings 9 and 10, between the opposite ends of which are connected a capacitor 11,

clamped ballast resistor 12,

and between the same ends of the windings

leveling resistors 13 and 14 are included.

Resistors 13 and 14 are selected.

such that during the formation of a pulse on the load 5, the voltage drop across them is equal to the voltage drop on the windings of the choke 8.

The capacitance of the capacitor 11 is chosen equal to the capacitance of the pulse transformer 6.

The resistance of the ballast resistor 12 is chosen so that by the time the droplets 8 return to the initial state, the voltage across the capacitor 11 becomes almost zero.

The generator works as follows.

From the power source 1, the capacitor 3 is charged through the charging element 2. When the key 4 is closed, a voltage pulse is generated at the load 5, and the voltage is re-magnetized

the inductor 8 and the current through the resistors 13, 14, is equal to the current through the unsaturated choke 8; the plates of the capacitor 11 are under the same potential and it remains uncharged during the formation of a pulse.

When key 4 is opened, the decline begins

the pulse, the core of the throttle 8 is saturated, the capacitance of the pulse transformer 6 is discharged to the capacitor 11 through the saturated choke 8, which ensures a short duration of the pulse decline. The equality of the capacitors of the capacitor 11 and the pulse transformer 6 ensures that the capacity of the pulse transformer is completely discharged to the moment when the discharge current becomes equal to zero. Reverse discharge of the capacitor 11 to the capacitance of the pulse transformer 6 does not occur, since the choke 8 under the action of the reverse current goes into an unsaturated state. The voltage up to which the capacitor 11 is charged differs little from the output voltage and is mainly determined by the properties of the non-linear load. Such a high voltage on the capacitor 11 provides a quick return to the initial state of the throttle 8. The capacitor 11, which is charged by the capacitance of the pulse transformer 6, is discharged in three parallel circuits: resistor 14 - winding 9 droplets 8 - winding 10 - resistor 13 - resistor 12.

Resistors 13 and 14 still carry current that is approximately equal to the current through the windings of unsaturated droplets 8, and the voltage drop across these resistors is close to the voltage drop on windings 9 and 10 of the droplets 8. Therefore, almost zero potential remains at load 5. The excess energy in capacitor 11 is dissipated in resistor 12.

Subject invention

A magnetic pulse generator containing a power source, a charging element, a storage capacitor, a key, a correction circuit, a pulse transformer and a magnetron in the load circuit, characterized in that, in order to reduce the duration of the pulse decline and increase the following frequency, the correction circuit is made in the form of throttles with two windings, between the ends of which are equalized the equalizing resistors, and between the opposite ends of the connected capacitor, shunted by a ballast resistor.