SU855750A1 - Device for power supply of electron-beam load - Google Patents

Description

Nick IT forms a rectangular voltage pulse on a load connected to the secondary winding. A controlled discharge or a hydrogen tyrantron is used as a switch; IT is collected on a ring or O-shaped core of U2.

A disadvantage of the known device is the need to match the wave resistance of the forming line and the load for a given pulse duration. This limits the functionality of the power supply device when the load resistance and the pulse duration vary, since the forming properties of the system are lost and the reception of square impulses becomes impossible. IT is always calculated for a fixed pulse duration for which the allowable induction increment in the IT core and the iron cross section are selected.

The purpose of the invention is to enhance the functionality by generating square voltage pulses at a high resistive load and increasing efficiency.

The goal is achieved by the fact that a power supply device containing a pulse transformer with a toroidal core carrying the primary and secondary windings is connected to the primary winding by a valve switch and a capacitive drive, equipped with a controlled key element and a pulse shaper with a delay unit, while the key element is turned on parallel to the secondary winding as well. A pulse driver is connected between the control inputs of the valve switch and the key element.

FIG. 1 is a schematic diagram of the device; Fig.2 timing diagram of the device.

The device contains a valve controlled switch 1 of the primary circuit, a capacitive drive 2, the primary winding 3 of the transformer, a toroidal ferromagnetic core 4. The secondary winding 5 is connected to an electron beam load 6. and is bridged by a controlled key element 7, the control electric of which is connected to the unit 8 start and delay.

The device works as follows. °

The capacitive drive 2 is charged from an external source, while the charge current circuit is closed through the primary winding 3 of the IT, and the charge on the capacitor plates is retained by the valve switch 1. When the maximum voltage on the drive 2 is reached, switch 1 is triggered and the conversion and transfer of energy of the capacitive storage device 2 to the load circuit 6. At the same time, the core 4 is partially saturated, and the discharge current of the primary circuit is transformed into a voltage on the load 6, i.e. the ratio of the load resistance R and the primary loop R, determined by the I "I .., is optimal.

0 toroidal core 4 of the ribbon permallo, the primary winding in the form of a flat frame, and the secondary - toroidal. The value of the mutual inductance

5 contours in the formation of fronts of the order f 0.1 of the ISS depends on the induction B, the intensity of the field H and their first derivatives with respect to time. The formation of a high voltage pulse on the load 6 occurs under conditions when the flux linkage is determined by the load current, and the pulse duration B (t) corresponds only to the front of the primary pulse H (t).

The calculated cross section of the core and the pulse duration at the load are determined by the ratio

5.d 8- p

and

where S is the cross section of iron;

U, B is the induction increment;

C - conditional fictitious value of primary voltage

 one.%;

n - the safety factor

the cross section of iron, which characterizes the structure of the magnetic field of the transformer.

The value of the coefficient n is determined by the ratio

where EHz is the pulse duration of the primary discharge current; t is the duration of the induction pulse.

The flat part of the pulse is formed in the range of the discharge current conversion. After the operation of the controlled key element shunting the load, an abrupt change in the nature of the energy process and the magnetic permeability of the core occurs, and the energy recovery cycle in the capacitive storage begins. In this case, part of the energy remains in the capacitive storage and is used in the next cycle.

Thus, the formation of the trailing edge of the pulse. Coincides with the process of energy recovery

capacity of the primary circuit.

Claims (1)

inventions Formula 'Electron beam load power supply device containing a pulse transformer with a toroidal core carrying the primary and' secondary windings to the primary winding: Ke connected a valve switch and capacitive storage, characterized in that, in order to expand functionality by forming rectangular pulses and increasing efficiency due to energy recovery, by whose element and pulse shaper with a delay unit, while the key element is connected in parallel with the secondary winding, and f pulse generator is connected between the control inputs of the valve switch and the key element.