SU1408508A1 - Static ferromagnetic frequency quadruplier - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a single-phase power source with a twisted frequency. The purpose of the invention is to simplify the device by eliminating the direct current bias circuit. The frequency multiplier contains oscillating circuits 1-4, formed from parallel-connected primary windings of transformers 5-8 kjooH kxxy-l and capacitors 9-12. All circuits are connected in series and connected between the input terminals. . The secondary windings of transformers are connected in a zigzag. When current passes through the primary windings of transformers, due to the presence of residual magnetic flux in the cores in oscillatory circuits, fourth harmonic current arises. This current, passing through the secondary windings, creates a magnetizing force, which, adding to the magnetizing force of the primary windings, creates an additional constant magnetic flux in the cores. In this case, the effect of higher magnetic flux occurs. Capacitors 9-12 further increase the constant magnetic flux, and also establish the necessary phase relationships between the circuits, which allow to obtain a voltage across the load, the frequency of which is four times higher than the net voltage frequency (L CX). ate about 00

Description

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The invention relates to electrical engineering and can be used as a single-phase power source of higher frequency.

The purpose of the invention is to simplify the frequency multiplier by eliminating the direct current biasing circuit.

Figure 1 shows a schematic diagram of a frequency multiplier; figure 2 -

diagrams of the input and., and output and,

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The frequency multiplier (Fig. 1) contains oscillatory circuits 1-4, formed from parallel-connected primary windings of transformers 5-8 and capacitors 9-12, respectively. The primary windings of transformers are connected in series with the input terminal 13, to connect the | Single-phase network, the beginning of the 1-WAY oscillating circuit 1 is connected, and the end of the 1-winding of the oscillating circuit 4 is connected to the 1 inlet 14. J. The secondary windings of the transformers are connected in a zigzag so that end (end) the secondary winding of the transformer jpa 5 is connected to the beginning of the secondary winding of the transformer 7, the end of which is connected to the end of the secondary circuit of the transformer 6 "The beginning of the secondary winding of the transformer is 6 soy, - it is called the end of the secondary The winding of the transformer 8, the beginning of which, and also the beginning of the secondary winding of the transformer 5, are connected to the output terminals 15 and 16, respectively, to connect the load 17. I The frequency multiplier works with the following

I When switching on the frequency multiplier to the source of single-phase sinusoidal voltage Ugjj frequency f 50 Hz, the cores of the magnetic circuit of the transformers 5-8 are saturated and, just because there is a slight residual magnetic flux in the cores, in the oscillatory circuits I - 4 there is a small current of even 1 Armonikio Passage through the secondary windings of transformers 5-8, this foK creates a small magnetizing force, which, adding to the magnetizing force f of the primary windings of transformers 5-8, creates an additional constant Magnet Yy flow in the cores, i.e. The effect of rectifying the magnetic flux is happening. Constant magnetic flux due to the presence of capacitors 9-12 directed so that polarization of the cores increases and even harmonic current in oscillatory circuits I - 4 increases. This causes a further increase in magnetizing force and, accordingly, constant magnetic flux. This process ends at the degree of saturation of cores when a constant magnetic flux ceases to increase

Selection of capacitors 9-12 sets the phase relations so that the voltage vectors U, (oscillatory circuit 1) and Uj (oscillatory circuit 2) are ahead of the current vector i gx (single-phase power source) by 45 el, degrees, and the voltage vectors UJ (oscillatory circuit W) and U; (oscillatory circuit 4} lagged behind the current vector Id by 45 eLo grad. Thanks to the indicated phase relations, the first harmonics of magnetic fluxes penetrating the cores of the transformer 5-8 magnetic cores are mutually shifted by 90 degrees, the second ones are 180 degrees el. at 360 el.gr. The third and other harmonics are absent in the magnetic flux curve, since the voltage Ug of a single-phase power supply is sinusoidal. Secondary windings of transformers 5-8 are connected in a zigzag mode. The second harmonics and the emf induced by them are connected in this way. in the secondary windings circuit of the transformer 5-8, they are mutually destroyed, and the fourth harmonic emf is added up and at the outputs of outputs 15 and 16 the voltage Uch | is generated, multiplied four times the frequency of the power source

Their oscillograms (Figs. 2) show that the voltage frequency Ug, at the output of the frequency multiplier, has four times the frequency of the power supply.

Claims (1)

Invention Formula A static ferromagnetic frequency multiplier four times, containing four installed transformers, on the terminals of each of which there is one primary and one secondary winding and two capacitors, and the primary windings of the transformers form a circuit connected between the input terminals for connecting the supply network, characterized in that, in order to simplify by eliminating the direct current bias circuit, two capacitors are additionally introduced, with the primary windings of the transformers in this circuit connected in series and each of them is bridged one of these capacitors, the beginning of the secondary winding first, jg 085084 The second transformer and the beginning of the secondary winding of the last transformer form output terminals for connecting the load, the end of the secondary winding of the first transformer is connected to the beginning of the secondary winding of the third transformer, its end connected to the end of the secondary winding of the second transformer, beginning from the second winding of the last transformer. CHALLALLAAA / v, Srig.G. ,  out