SU1005249A1

SU1005249A1 - Ferromagnetic frequency divider

Info

Publication number: SU1005249A1
Application number: SU802884726A
Authority: SU
Inventors: Виталий Михайлович Бладыко; Леонид Иванович Сончик
Original assignee: Белорусский Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1980-02-20
Filing date: 1980-02-20
Publication date: 1983-03-15

Description

Изобретение относитс к преобра зевательной технике и может быть использовано во вторичных источниках питани , в различных системах автоматики, в размагничивающих устройствах , дл питани трехфазных потребителей переменного тока пониженной частоты.The invention relates to a conversion technique and can be used in secondary power sources, in various automation systems, in demagnetizing devices, for powering three-phase, low-frequency alternating current consumers.

Известны делители частоты в три раза с: преобразованием однофазного переменного тока в трехфазный, содержащие три однофазных трансформатора/ первичные обмотки которых соединены последовательно - согласно, а вторичные - с паралельно им включенными конденсаторами по схеме звезды 1.Known frequency dividers three times with: the conversion of single-phase alternating current into three-phase, containing three single-phase transformer / primary windings of which are connected in series - according to, and the secondary windings - with parallel included capacitors according to the scheme 1.

Однако в этих устройствах искажены фазные напр жени из-за наличи f них основной гармоники напр жени вследствие влени трансформации напр жений . Конденсаторы, включенные параллельно вторичнык: обмоткам,оказывают вли ние на выходные характеристики,, конструктивное исполнение сложно и громоздко вследствие наличи трех однофазных трансформаторов.However, in these devices the phase voltages are distorted due to the presence of the main voltage harmonics f of them due to the appearance of voltage transformation. Capacitors connected in parallel to the secondary: windings, affect the output characteristics, the design is difficult and cumbersome due to the presence of three single-phase transformers.

Наиболее близким к изобретению вл етс ферромагнитный делитель частоты, содержащий насыщающиес Closest to the invention is a ferromagnetic frequency divider containing saturable

трансформаторы с расположенными на их стержн х соединенными согласно последовательно первичными обмоткаг ми, параллельно Кс1ждой из которых включен конденсатор, и вторичными Обмотками, одни концы которых образуют выходные выводы 2.transformers with primary windings connected in series according to their rods, parallel to Кс1 each of which includes a capacitor, and secondary windings, one ends of which form the output pins 2.

Однако форма выходного напр же10 ни этого делител частоты вл етс несколько искаженной за счет содержани , высших гармоник.However, the shape of the output voltage 10 of this frequency divider is somewhat distorted due to the content of higher harmonics.

Целью изобретени вл етс улучшение формьт выходного напр жени путем The aim of the invention is to improve output voltage formats by

15 исключени в нем основной гармоники.15 exclude the main harmonics in it.

Указанна цель достигаетс тем,; что в ферромагнитном делителе частоты , содержащем .насьндсиощиес , транс- форматоры с расположенными на их стержн х соединенными согласно последовательно первичными, обмотками , параллельно каждой из которых включен конденсатор, и вторичными обмотками, одни концы которых обра25 зуют выходные выводы, каждый трансформатор снабжен дополнительной обмоткой, соединенной одним концом . с вторым концом вторичной обмотки другого трансформатора, образу ; This goal is achieved by; that in a ferromagnetic frequency divider, containing in real power, transformers with primary terminals arranged on their rods in series, windings parallel to each of which a capacitor is connected, and secondary windings, one ends of which form the output terminals, each transformer is provided with an additional winding connected by one end. with the second end of the secondary winding of another transformer, form;

Claims

30 anti-sequential circuit. the other ends of all the additional windings are combined at a common point. In FIG. Figures 1 and 2 show the principle divider circuits three times with the conversion of single-phase alternating current into three-phase, made on the basis of three single-phase transformers; in fig. 3 is the same, made; on the basis of a twisted spatial magnetic circuit of a three-phase transformer. The frequency divider (figure 1) contains three single-phase transformer primary windings 2 are connected according to - in series. The secondary windings 3 form the output pins, each of the additional windings of the corresponding transformer is connected in series - facing the corresponding secondary winding of another transformer: 1 X1 of the primary windings is shunted by a capacitor 5. The frequency divider works as follows. When the input voltage is applied to a certain value, parametric oscillations occur in the frequency divider and the frequency is divided threefold with the conversion of the single-phase voltage of the fundamental frequency to the symmetric three-phase voltage. Due to the combination of secondary and additional windings in series - oppositely, the EMF excited by magnetic Fluxes into them is directed oppositely and in the output voltage there will be no component of the main harmonic, which is a zero sequence of phase alternation with respect to the output voltage subharmonic. The inclusion of capacitors 5 at the output of the frequency divider parallel to the primary windings eliminates their influence on the output characteristics of the device. Figure 2 is a variant of the frequency divider in the case when each of the capacitors 5 is connected in parallel with the corresponding secondary winding. The frequency divider in FIG. 3 contains three frames of the magnetic circuit of the twisted structure of the transformer 1, joined by semi-cores, primary on the coils 2, located on the frames. the magnetic circuit connected in series according to, secondary windings 3, which cover half-cores, connected according to the star circuit, capacitors 5 are connected in parallel with the primary windings. The frequency divider works as follows. Magnetic fluxes, excited by the current of the primary winding when applying a voltage of a certain magnitude, in the half-cores joined by the sides, have the opposite direction. As a result, in the output voltage of the secondary windings covering the half-cores, there is no component of the main harmonic of the voltage, which is a zero sequence of phase alternation with respect to the subharmonic of the output voltage. The claims of the ferromagnetic frequency divider, containing saturated transformers q located on their rods connected according to - successively primary windings parallel to each of which a capacitor is connected, and secondary windings, one ends of which form output, conclusions, characterized in that output voltage by eliminating the main harmonic therein, a transformer is provided with an additional winding connected by one end to the second end of the secondary winding another transformer to form a counter-series circuit, with the other ends of all additional windings combined into a common point. Sources of information taken into account in the examination1. Karimov A.S. Theoretical and experimental analysis of amplitude, frequency and phase relations in ferroresonance chains when auto parametric oscillations are excited. Author. dis. on the competition Academic degree of Dr. Tech. sciences. M., 1979, p. 38

2. USSR author's certificate 678611, cl. H 02 M 5/16, 1978.

W

FI22

5 g