SU601792A1 - Transistorized inverter - Google Patents

Description

The invention relates to electrical engineering and can be used, in particular, to power DC and AC electric motors.

A transistor inverter is known, consisting of preliminary and power stages with a transformer connection between them I.

The disadvantage of such an inverter is that it cannot transmit a constant signal, but a considerable size.

The closest in technical essence and the achieved result. The invention is an inverter comprising a power terminal stage and a two-cycle pre-terminal stage with a transformer connection between them and a current transformer connecting the load of the inverter with a collector circuit of transistors pre-finite. cascade 2. This inverter and: has the same disadvantages.

The aim of the invention is to expand} its functionality and the reduction of the inverter G-bar.

The goal is achieved by the fact that the transistor inverter, containing the power terminal; CAC | Kad and the push-pull pre-end - cascade with transformer connection between them and the current transformer, connecting the load of the inverter with the collector of the pre-end The cascade is equipped with a higher frequency generator, with a VDHO output. D. Which is connected to the input circuit of the transistors of the pre-final cascade, indicated between the two contact transformers, the primary winding of each of which including on the collector circuit of the transistor of one of the shoulders of the pre-end cascade, and the secondary winding through a diode. and is connected in series with the primary winding of the control transformer, and the primary winding of the current transformer encompasses both ser.dechniki.

The drawing shows a schematic diagram of the transistor inverter.

It contains a power terminal cascade on a power transistor / and a push-pull pre-terminal cascade on transistors 2, 3. The circuits; the collector of transistors 2, 3 include the primary windings 4, 5 of the control transformers 6, 7, the secondary windings 5, 5 through which diodes 10, 11 are connected to the input of the power transistor /. The current transformer 12 is made on two ser.1, echniki, on one of which. X is located. The first second winding 13 is on the second, the second secondary latch 14 is on the other, and the primary winding 15 covers

both cores. The inverter has a high-frequency generator 16, the output of which 17, 18, and 19 is connected to the input circuit of transistors 2, 3. The input signal is applied to terminals 1, 20, 21, the voltage is connected to terminals 21, 22, and the load is connected to terminals 23 24

The principle of operation of the inverter is as follows. When a negative polarity (relative to; terminal 21) input signal is applied to terminal 20, transistors 2, 3 begin to switch at a frequency set by a higher frequency generator 17. In the input circuit of the power transistor /., It appears as such, and it opens. The load current, flowed through the terminal transformer transformer, ka 12, sets the collector currents of the transistors 2, 3, and hence the current value of the base of the power transistor /. For a time equal to half the period of the output voltage of the high frequency generator 16 (taken off terminal 17, 18, 19), the transistor 2 (3) is in a closed state. At this time, the magnetization is reset to the initial state of the control cores, their transformers 6 (7), and one of the current transformer cores 12. Transition windings Magnetized control transformers 6, 7, not shown in the drawing, can be connected in series a circuit 25 of the reversal of the initial state of the cores of the current transformer 12.

Thus, the introduction of a higher frequency generator into the inverter allows one to reduce the dimensions of the transformers and the inverter as a whole, and the completion of the inter-coaxial communication on the two transformers makes it possible to transmit a signal to alternating current and so on.

The introduction of a second push-pull device to the device; the final stage allows the inverter to be carried out according to a bridge.

Claims (2)

1. Patent of England No. 10 &3867,; cl. H 2 F, 62. 2. USSR author's testimony No. 342271, cl. H 02 M 7Sh7, 1969.