SU381146A1 - MAGNETIC TYRISTOR GENERATOR OF HIGH FREQUENCY - Google Patents

Description

one

The device can be used to generate packets of radio pulses.

A high-frequency thyristor generator containing a power source, a charging circuit in the form of serially connected charge droplets, droplets with a saturating core, a primary winding of a saturating transformer and a capacitor, as well as magnetic links and a load circuit are known. A controlled Hungarian is switched between the point of connection of the chokes and the negative terminal of the power supply.

When the generator develops a packet of pulses, a parasitic amplitude modulation occurs in the pause through the thyristor and the cutting diode due to leakage of the charge of the storage capacitor.

The purpose of the invention is to eliminate spurious amplitude modulation. It is achieved by the fact that an additional controlled valve is included in the charging circuit of the proposed generator.

The generator circuit is shown in the drawing.

The generator contains a controlled charging valve (thyristor) 1, a capacitive storage capacitor 2, a charging choke 3, a choke with a saturable core 4, a transformer with a saturating core 5, a controlled discharge valve (thyristor) 6, magnetic squeeze 7, an oscillatory load contour 8.

When a signal is supplied from the control device to the control electrode of the thyristor / the latter is turned on, and the capacitor 2 is charged through the chokes 5, 4 and the primary winding of the transformer 5. The choke 4 and the transformer have saturable cores.

The inductance of the droplets 4 in the unsaturated state is many times less than the inductance of the transformer primary winding and the inductance of the droplets 3, which is why the choke 4 does not play a significant role both in the process of charging the capacitor and in the process of its discharge.

At the end of the charge, the thyristor 6 is turned on by the signal from the control device, which is delayed to the required device, and the discharge current of the capacitor begins to flow through it. Since the capacitor starts to discharge when the core of the transformer is in the saturation state, the auxiliary saturable choke 4 for some time limits the rate of increase of the discharge current to the permissible thyristor

6 sizes.

Then the transformer core leaves the saturation region, and the energy stored in the capacitor is transferred to one of the magnetic links 7 and so on from the link to the link. In the Calsdo magnetic link, the pulse is compressed with time. The short current pulse received in the last link excites damping oscillations at the resonant frequency B of circuit 8.

Due to the presence of an additional valve / pause between the end of the charge and the beginning of the discharge of the capacitor in the circuit, it decreases to the value of the order of restoring the non-conducting state of the thyristor (tens of microseconds), which eliminates the parasitic amplitude modulation and makes it possible to increase the efficiency . when working with pulse packets.

Subject invention

A high frequency magnetic thyristor generator containing a power source, a charging circuit in the form of series-connected charge droplets, a throttle with a saturating core, a primary winding of a saturating core transformer and a capacitor, while a controlled one is connected between the junction of the chokes and the negative terminal of the power supply. a discharge valve, as well as successively connected magnetic compression links and a load circuit, characterized in that, in order to eliminate the parasitic amplitude mode st tion between the positive power supply terminal and the charging choke included additional controllable valve.