SU585580A1 - Converter - Google Patents

Description

(54) CONVERTER

I

The invention relates to electrical engineering, in particular to secondary power sources, and is intended for controlling and stabilizing the output voltage.

Known converters do not allow a wide range of voltage regulation to be achieved. | 1,

The closest to the technical essence of the present invention is a converter, containing a Push-pull power amplifier with an output transformer, to the primary winding of which the power transistors are connected, and to the secondary winding -. rectifier with capacitive filter. moreover, in series with one ne input pins, the dross is switched on ..

The purpose of the invention is a range of voltage regulation.

This is achieved — the fact that in a converter containing a Push-pull power amplifier with an output transformer to which the power transistors are connected to the primary winding and a rectifier to a secondary winding with a capacitive filter, the primary winding of the transformer is shunted with a two-core saturation throttle.

FIG. 1 is a schematic diagram of a converter; in fig. 2 - diagrams explaining his work.

.2

The converter contains transistors 1, 2, two-core saturation choke 3, linear choke 4, transformer 5, diode-capacitor rectifier 6.

The choke 3 has windings: operating 7 and control 8 and resistor 9. The diagram also shows the power supply 10. Winding 8 is connected to a control voltage source. The output of the rectifier 6 is the output of the converter.

The converter works as follows.

Transistors 1 and 2, in antiphase operation, alternately in saturation and cutoff modes. In the absence of throttle 3 amplitude. e The voltage on the primary semi-windings of transformer 5 is equal to the voltage of the source, and there is no transient voltage on the choke 4, the operation of the throttles 3 significantly changes this pattern. In the half-period, when Transistor 2 is turned on at the electric sources of the windings 7 (marked with dots in Fig. I) b, the voltage of positive polarity will be increased. In this case, the upper heart. magnetized in the same direction and winding 8, at time t, saturates, the voltage on its windings decreases to zero, the voltage on the lower half of the winding 8 and, therefore, on the winding 7 will also be close to zero, since the resistor 9 is chosen low-resistance (its resistance is 5-10 times more than the ohmic resistance of the winding 8). In the next half-period, at time t, the lower heart will saturate. Thus, in periods of time t, and tj-2H, choke 3 has a low operating resistance (the key is closed). In this case, the voltage across the choke 4 is equal to the voltage of the source 10, and the current through the choke 4 increases (see Fig. 2). When the key is open, the voltage on the choke 4 (see Fig. 2) is added to the voltage of source 10, and the transformer 5 will have an increased voltage amplitude. With an increase in the control current through the winding 8, the moment and saturation of the cores will become worse earlier, and the voltage amplitude on the windings of the transformer 5 will increase the strunlines in FIG. 2.). Since the voltage at the output of the rectifier 6 at low consumption currents is determined by the amplitude of the voltage on the output winding of the transformer 5, the output voltage of the converter can be adjusted over wider limits. In place of straightener 6 can

a diode-capacitor voltage multiplier should be installed.

Claims (2)

Invention Formula A converter containing a push-pull power amplifier with an output transformer to the primary winding of which is under the power rpaHaMctopw, and a secondary winding is a rectifier with a capacitive filter, the choke is connected to one of the input terminals, which differs expanding the control range, the primary winding is quenched with a double-core saturation throttle. Sources of information taken into account in the examination: L US Patent No. 3432737, cl. 321-2, 1969. 2. USSR author's certificate No. 514401, cl. H 02 M 3/315, 1974, ъ J I %