SU419866A1 - TIRISTORN [THEN CONSTANT VOLTAGE REGULATOR - Google Patents

Description

one

Historical dc voltage regulators are known that contain a dual-relay thyristor controlled by an immobilized 1 modulator based on a magneto-transistor generator and a control signal source.

To simplify the circuit in the proposed controller, a diode is connected to the slot of the base of one of the transistors of the magnet-transistor oscillator, and a control signal source is connected parallel to the junction source base of the same transistor.

The drawing is a diagram of the described controller.

The regulator contains a two-phase thyristor 1 connected via load 2 to power supply 3, and a pulse-width modulator, made on transformer 4, transistors 5 and 6, and resistor 7 connected according to a magneto-transistor generator circuit. A diode 8 is connected to the base of the transistor 6, and a control signal source 9 with a large internal resistance is connected to the emitter in the junction emitter base. The control electrode of the thyristor 1 is connected via a capacitor 10 to a tap from the collector winding of the transistor 6.

The regulator works as follows.

When the sources 3 and 9 are turned off, the transistor 6 opens. If the current of source 9 has a sufficient value, then transistor 6 is saturated and the entire voltage of source 3 is applied to the right half of the collector

transformer windings. The polarity of the voltages on the windings of the transformer corresponds to that indicated in the diagram, the transistor 5 and diode 8 are closed by the voltages of the base windings, and the thyristor 1 is turned on by a current pulse passing through its control junction and capacitor 10.

The first half period lasts until the magnetic flux in the core of the transformer reaches saturation,

whereupon the transistors switch. The polarities of the currents on the windings of the transformer change, the thyristor 1 is turned off by a current pulse of negative polarity, the transistor 5 is kept in the on state

the state of the voltage of the base winding through the resistor 7, and the transistor 6 is galvanized by the direction of the other base wrap. The second half period also continues until the core of the transformer is saturated, after which the delayed processes are repeated. Duration

both half periods are the same if the numbers

turns of the half collector winding are equal.

If the magnitude of the current source 9 decrease,

the transistor b does not open completely and

part of the supply voltage 3 is applied to the right collector semi-winding. Proceed. The length of each first half-period increases at a constant volt-second area of the voltage curve, which corresponds to an increase in the output voltage of the regulator. In order for the duration of the first half period to be less than the durations of the second | Half Period, it is sufficient to reduce the number of turns of the right collector half winding.

Thus, the duration of the disconnected state of the thyristor is unchanged, and the length of the liiOCTb switched on state varies in the first range. The average voltage increase at load 2 can practically be controlled within 0.2-1 from the voltage of source 3. The controlled thyristor junction can also be connected to the auxiliary winding of the transformer.

Subject invention

A thyristor voltage regulator containing a dual-operative thyristor controlled from a lattice-impulse modulator, implemented on the basis of a magnet-transistor generator and a control signal source, characterized in that, in order to simplify the circuit, into the base circuit of one of the transistors The magneto-transistor generator is connected to a diode, and a control signal source is connected parallel to the emitter-base junction of the same transistor.