SU559349A1 - Push-pull transistor inverter - Google Patents

Description

I

The invention relates to the field of power engineering and can be used in the power supply system of various devices for converting a constant voltage to an alternating voltage.

Known inverter containing a transformer and transistor switches l.

The transistor switches are controlled from the base of the source of impulse pulses through a basic impedance.

The disadvantage of such an inverter is the dependence of the BAA current redundancy ratio, 1 on the load current and significant dynamic losses in the transistors.

Also known are inverters in which schemes are applied that reduce dynamic losses due to a brief increase in the base current redundancy ratio and the introduction of an automatic turn-on delay of the transistor. In a key power amplifier 2 to reduce the dynamic losses parallel to the transition emitter-base of each transistor, jased by a resistor with a winding matching transformer, a chain is included

From the series-connected diode on the auxiliary winding of the output transformer of the mater, an additional transistor was introduced into the base circuit to reduce the dynamic losses of the switching transistor in the transistor switch control circuit. In the considered inverters, the dependence of the base current redundancy ratio on the load value is not excluded.

The aim of the invention is to increase the efficiency of the inventor.

This goal in relation to the 3 is achieved, so that the bases of additional tp aH3HCTt ditch are connected to the taps of the primary winding of the output transformer via auxiliary transistor, whose input is connected to the additional winding of the transformer

The drawing is a principled electr. Chesk scheme of the proposed inverter.

It consists of a short-circuit of the output transformer 1, power transistors 2, 3, additional transistors 4, 5 with serial diodes 6 and 7 and shunting diode & 8, 9. Base additional transistors