RU24607U1 - RESONANCE PULSE GENERATOR BASED ON SOS-DIODE - Google Patents

Abstract

A resonant pulse generator based on a SOS diode, containing a power source, an oscillatory circuit consisting of a capacitor, inductive storage, current chopper and load chopper, characterized in that the current chopper is a SOS diode, inductive storage is a boost autotransformer, to the input of which a source is connected power supply and capacitor, and to the output - SOS diode and load, while the power source is a sinusoidal voltage generator.

Description

The utility model relates to pulsed technology and can be used as a voltage converter, a generator for excitation or breakdown of discharge lamps, etc.

A known nanosecond pulse generator comprising a thyristor charger, a magnetic compressor, SOS diodes (Semiconductor Opening Switch) and a load. Such a generator has a fully solid-state switching system using a thyristor and a step-up pulse transformer in the primary circuit. In the process of magnetic compression of the pulse during the transition of energy from one link to the next, the voltage doubles, the value of which is Uo2 °, where Uo is the output voltage of the pulse transformer, n is the number of compression links of the device. Then, a high voltage sinusoidal pulse was supplied to SOS diode 1. When a current is cut off, a high voltage voltage pulse with an amplitude of hundreds of kilovolts arises on the SOS diode.

The disadvantage of this generator is the low pulse repetition rate, not more than 250 Hz.

The closest to the utility model in terms of technical nature and the achieved result is a semiconductor generator of nanosecond pulses based on a drift diode with a sharp recovery (ДДРВ), containing ДДРВ, a charger, a reverse current circuit, consisting of a capacitor, an inductor and a switch, and a direct current circuit, consisting of a capacitor, an inductor and a switch. Parallel to the DDRV is a load circuit. In addition, in the generator, a shunt diode is connected parallel to the capacitor of the reverse current circuit, which is connected by the anode to the DDRV anode, and a saturation reactor with a demagnetization circuit 2 is used as a reverse current switch.

However, the known generator has some drawbacks, namely, the need to demagnetize a switching choke, which complicates the circuit, limiting the pulse repetition rate (not more than 20 kHz) and a low overvoltage coefficient. Such a pulse generator operates only on a low-impedance load.

The reasons that impede the achievement of the following goal when using the known device adopted for the prototype include the fact that in the known device there are no elements enabling the generator to operate at a higher pulse repetition rate, a higher overvoltage ratio.

The purpose of the utility model is to generate pulses with a duration of several hundred nanoseconds with a repetition rate of more than a hundred kilohertz, with the possibility of using low-current switches and operating the generator for high-impedance or capacitive loads.

This goal is achieved by the fact that the inventive device contains a power source, an oscillating circuit, consisting of a capacitor, inductive storage, current chopper and load, according to the technical solution, the current chopper is a SOS diode, inductive storage - increasing autotransformer. A power source and a capacitor are connected to the input of the boosting autotransformer, and a SOS diode and load are connected to the output, while the power source is a sinusoidal voltage generator.

In FIG. 1 shows a circuit diagram of a resonant pulse generator based on an SOS diode.

In FIG. 2 shows diagrams of voltage 1, voltage at point A - 2, and current of SOS diode-3.

The resonant pulse generator based on the SOS diode contains a sinusoidal voltage generator 1, a capacitor C, increasing the autotransformer L, SOS diode 2 and load 3.

A significant drawback of previous generators operating in high-frequency pulsed modes is the accumulation of charge in capacitor C after a current interruption process. Such generators cannot operate at a high pulse repetition rate for a high-resistance or capacitive load. To discharge the capacitor C, it is necessary to install a discharge resistor in parallel with the capacitor, i.e. dissipate the residual energy in the capacitor, which is not effective.

The resonant pulse generator based on the SOS diode has a higher efficiency, a higher overvoltage coefficient (in individual modes more than 10), the ability to work at a higher pulse repetition rate (over 10 kHz). The generator operates in resonant mode, i.e. switching frequency, coincides with the natural frequency of the circuit, consisting of a capacitor C, uplifting autotransformer L, SOS diode 2 and load 3.

The principle of operation of a resonant pulse generator based on an SOS diode is as follows. The sinusoidal voltage generator 1, tuned to a frequency equal to the natural frequency of the oscillations of the circuit consisting of a capacitor C, povyshayuschego autotransformer L, SOS diode 2 and load 3, is the causative agent of oscillations in this circuit. When current flows through the SOS diode 2 in the forward direction, the SOS diode 1.3 is pumped. Further, at the moment the reverse current flows through the SOS diode 2, a current break occurs and a negative voltage pulse of 200-300 nsec duration appears on the SOS diode 2. Further, the process is cyclically repeated.

Ojcboz

The principle of operation of the floor) steam-water diode current chopper is as follows. A direct current pulse of short duration in the base near the pn junction creates a thin layer of injected plasma, in which the bulk of the accumulated charge is concentrated. When the reverse pump current flows, the plasma layer dissolves at the pn junction with the drift removal of holes from the rest of the base. SOS diodes are new high-voltage devices, based on which / 7 - / - "is an l-structure with a shorter current interruption time (4-25 ns) 3.

Using the inventive device for the first time received a low-current frequency SOS effect. When the amplitude of the sinusoidal voltage of the generator 1 is 11 volts, voltage pulses of 370 volts are obtained, with a duration of 220 NS on the base, with a repetition frequency of 140 kHz. A 470 Ohm resistor is used as the load. Overvoltage coefficient is from 8 to 10, depending on the size and nature of the load

The circuit parameters: a sinusoidal voltage generator 1 - G4-153, a capacitor C - K73-16-400-0.1, a coil L wound with PEV-2 0.3 wire on a dielectric pipe with a diameter of 30 mm, contained 60 turns with a midpoint output.

Sources of information.

1.Rukin S.N. Generators of powerful nanosecond pulses with semiconductor interruptions of currents // Instruments and experimental technology, 1999, N4, p. 5-36.

2. Patent RU .№2009611, published in B.I. No. 5, dated 03/15/94. (prototype).

3. Patent RU No. 2156014, published in B.I. .№25, dated September 09, 2000

Claims (1)

A resonant pulse generator based on a SOS diode, containing a power source, an oscillatory circuit consisting of a capacitor, inductive storage, current chopper and load, characterized in that the current chopper is a SOS diode, inductive storage - boost autotransformer, to the input of which a source is connected power supply and capacitor, and to the output - SOS diode and load, while the power source is a sinusoidal voltage generator.