SU922943A1 - Protected pulse supply source - Google Patents

Description

The invention relates to the protection of converters, in particular, generators packs of unipolar current pulses, having a long pause between packs.

Known power supply of the protected ^1, comprising a thyristor inverter and a capacitor-thyristor switch [11.

The disadvantage of this source is unsuitability to work with a large ¹⁰

duty ratio.

The closest in technical essence and achieved result of the proposed switching power source is protected, soder- ⁵ zhaschy constant current source coupled to the thyristor via a supply and an L-shaped LC filter and the inverter

load, equipped with a blanking circuit ·

" 20

supply thyristor, consisting of a protective thyristor, a switching capacitor and a current-limiting choke [2].

2

A disadvantage of the known device is limited functional capabilities.

The purpose of the invention is the expansion of functionality.

To achieve this goal, the source is equipped with an additional thyristor, and the filter choke is made with a tap which is connected to the anode of the additional thyristor, the cathode of which is connected to the anode of the supply thyristor.

The imp is a diagram of the device.

The apparatus consists of a source 1 DC supply thyristor 2, the protective thyristor 3 commutating capacitor 4, the current-limiting choke 5, the throttle 6 filter ^-, capacitor 7, a filter, an inverter 8 and a load 9 'between the taps throttle 6 and the anode of the thyristor 2 is enabled counter thyristor ten.

922943

During operation of inverter C, bundles of unipolar current pulses flow through load 9, and direct current flows through choke 6, which has an average value of the currents forming the pulse packs.

During the pause, the inverter turns off and the current stops flowing through load 9. But the current cannot flow through the choke 6. As a result, the capacitor 7 starts to charge during the pause. If the pauses are so long that all the energy stored in the choke 6 has time to be transferred to the capacitor 7, it will begin to discharge, the current through thyristor 2 will flow in the opposite direction and thyristor 2 will turn off.

To keep the thyristor 2 in the on state during a pause when turning off the inverter valves, it can be bridged together with the throttle section 6 with the counter thyristor 10. Then through the thyristor 2, the throttle section 6 and the thyristor 10 will flow a current; The second one keeps the supply thyristor in the on state. When shunting the throttle section 6, the capacitor 7 is charged to a lesser extent.

After the end of the pause and the inclusion of the inverter 8, the voltage on the capacitor 7 becomes less than the voltage of source 1 and the thyristor 10 goes out.

In emergency mode, a trigger pulse is applied to the thyristor 3 and the capacitor 4, charged from an external source, is discharged through the choke 5 and the thyristor 2 and extinguishes it, regardless of whether it is on or off

5 thyristor 10.

The proposed device has advanced functionality.

Claims (1)

Claim The source of pulsed power supply with protection, containing a DC power source, connected through a supply thyristor and a L-shaped 1_C filter with an inverter and a load, equipped with a power supply circuit of the thyristor., Consisting of a protective thyristor, a switching capacitor and a current-limiting choke, in order to expand its functionality, it is equipped with an additional thyristor, and the filter choke is made with a tap, which is connected to the anode of an additional thyristor, the cathode of which is connected to the anode om power thyristor.