SU1432723A1 - Frequency converter - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the coefficient. transmission while reducing the size. The frequency converter contains a transformer 1 with primary winding 2 and secondary windings 3 and 4, ring diode bridges 5 and 6, consisting of diodes 7-14, load 15 and capacitors 16 and 17. Using transformer 1 with windings 2-4 ensures the field remains unchanged the current through the load 15 and the operation of the frequency converter in the phase detection mode. The introduction of series-connected capacitors 16 and 17 into one of the windings 3 or 4 leads to a decrease in the resultant flow of the scattering through the transformer 1, and, consequently, to a decrease in its dimensions. 1 hp ff, 1 ill. (L 4i SO th "h N9 O9

Description

This invention relates to radio engineering and can be used as a phase-sensitive rectifier of a demodulator and a modulator.

The purpose of the invention is to increase the transmission coefficient while decreasing the dimensions.

The drawing shows an electrical schematic diagram of a frequency converter.

The frequency converter contains a transformer 1, a primary winding 2, a first 3 and a second 4 secondary windings, a first 5 and a second 6 ring diode bridges containing diodes 7-10 and 11-14, respectively, and a load 15, as well as capacitors 16 and 17.

The frequency converter operates as follows.

At the moment when the electromotive force (EMF) RO of the secondary windings 3 and 4 is directed, for example, from right to left, the emf of the signal source applied to the inputs 18 generates a current branching in the opposite direction along the secondary winding 3 (without creating a resulting magnetic field, i.e., it is practically non-inductive), in diodes 8 and 9, in load 15 and diodes 11 and 14.

With a simultaneous change in the polarity of the signal and the switching voltage on the secondary windings 3 and 4, the positive half-wave passes through diodes 12 and 13, load 15 and di-; Odam 7 and 10.

Thus, when the phases of the switching current and the signal coincide, the field fi rity of the current through the load does not change:, i.e. the circuit operates in the mode of: phase detection.

The signal source and the load 15 can be included in place of each other. Transformer 1 can be either with a ferromagnetic core or with an air core and can be used for any frequency.

In order to reduce the size of transformer 1, the direction of the reactive component currents in the windings 3 and 4 can be reversed. In this case, capacitors 16 and 17 may be included in one of the secondary windings (shown by dotted lines). In this case, the direction of the coils or the inclusion of one of the secondary windings, or the direction of the inclusion of the diodes of one of the ring

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bridge diodes 5 or 6, or their inclusion among themselves should be reversed. The capacitance of these capacitors 16 and 17, connected in series, should create a capacitive current in its secondary winding (in this case in the secondary winding 3), which is close in absolute value to the inductive current of the secondary winding 4. In this case, in the core of the transformer 1, the currents created only by the active currents of the secondary windings 3 and 4 are added, and the capacitive (secondary winding 3) and inductive (secondary winding 4) currents cancel each other out. In addition, the inductive current in the primary winding 2, and hence the active losses, is also reduced. This leads to a decrease in the net flux dispersed through transformer 1 and, consequently, to the possibility of using a transformer of smaller dimensions.

Claims (2)

1. A frequency converter containing first and second diode ring bridges, between the first diagonals of which the load is included, the first and second inductive elements included in the second diagonals of the first and second diode ring bridges, respectively, and a third inductive element, characterized in that the purpose of increasing the transmission coefficient while reducing the size of the first, second and third inductive elements is made in the form of a transformer, the primary winding of which is the third inductive element t, and the first and second inductive elements are the first and second secondary windings of the transformer, and when the first and second secondary windings are consistently connected, the diodes of the first and second diode ring bridges are connected in opposite directions, the first and second secondary windings being made with taps from The middle point, which is the input of one of the convertible signals, and the terminals of the primary winding of the transformer are the input of the other convertible signal. 2. The converter according to claim 1, characterized in that the conclusions 3U327234 one of the secondary windings of the transformer- corresponding diode ring-mat- ter through the corresponding condenser bridge, with the secondary insulators connected to the second diagonal of the transformer connected in opposite directions.