SU620903A1

SU620903A1 - Measuring dc-to-ac voltage converter

Info

Publication number: SU620903A1
Application number: SU752096479A
Authority: SU
Inventors: Владислав Семенович Прохоров
Original assignee: Уральский Филиал Всесоюзного Научно-Исследовательского И Конструкторского Института "Цветметавтоматика"
Priority date: 1975-01-07
Filing date: 1975-01-07
Publication date: 1978-08-25

Description

Изобретение относитс к эпекгроизмеритепьной технике к может испопьзовать с в системах телеметрической передачи данных дн уплотнени каналов.This invention relates to an e-aggro-sensing technique that can be used in telemetry data transmission systems for the day of channel multiplexing.

Известен измерительный преобразовагегъ посто нного напр жени в переменное , выполненный на транзистфах с трансформатором и выпр мителем l .A measuring voltage-to-current conversion transformer, made on transistors with a transformer and rectifier l, is known.

Однако этот преобразователь не позво Л1ют получить длительности обоих попуп&« риодов выходного напр жени обратно пропорциональными первому и второму преобразуемым напр жени м.However, this converter does not allow L1yut to get the duration of both output and output phases of the output voltage inversely proportional to the first and second convertible voltages.

Известен также измерительный преобразовагель посто нного напр жени в переменное , построенный по схеме, г енератора Ройера 2 ,Also known measuring transformer constant voltage to AC, built according to the scheme, generator Royer 2

Однако такой преобразователь позвол ет производить преобразование в частоту пить только одно входное напр жение.However, such a converter allows conversion to drink only one input voltage per frequency.

Цель изобретени - расширение функциональных возможностей за счет получени длительности обоих полупериодов выходного напр жени обратно пропорциональными The purpose of the invention is to expand the functionality by obtaining the duration of both half-cycles of the output voltage inversely proportional to

Первому и второму преобразуемым напр жени м .The first and second transformable stresses

Это достигаетс тем, что измерительный преобразователь посто нного напр жени в переменное, содерЖБЩий генератор переменного напр жени , собранный по схеме Ройера, снабжен двум дополнител ными обмотками, первые выводы которых подключены к источникам преобразуемых посто нных напр жений, а вторые выводы через встречно включенные диоды - к бсн зам транзисторов генератора.This is achieved by the fact that the DC-to-AC voltage measuring converter, containing the alternating voltage generator assembled according to the Royer circuit, is equipped with two additional windings, the first terminals of which are connected to the sources of convertible DC voltages - to BSN deputy generator transistors.

На чертеже представлена принципиальна электрическа схема предлагаемого измерительного преобразовател посто нного напр жени в переменное.The drawing shows a circuit diagram of the proposed DC / DC voltage measuring transducer.

Claims

O contains an alternating voltage generator assembled according to Royer's scheme on transistors 1 and 2 in transformer 3 with windings 4 and 5 fed by or source of constant voltage 6. Transformer 3 also contains two additional windings 7 and 8, the first outputs of which are connected to the sources 9 and 1O of the convertible direct current sources of the research institutes, and the second outputs through the opposite Nc 12 diodes connected to the bases of the transistors 1 and 2 of the generator. The device works as follows. If the voltages taken from the additional windings 7 and 8 exceed the corresponding input voltages, a positive voltage is applied to the base of transistors 1 and 2, which locks them. The current through transistors 1 and 2 decreases, as a result of which the voltage across the additional windings 7 and 8 is set to levels and 1 and 112 of the input voltages. The duration of the popup periods of the output voltage is determined from the expression iBg-a-Wi where t is the half-period duration; B - induction saturation of the transformer core material 3 | 5 is a cross section of the core of transformer 3; number of turns of the winding 5 of the transport format 3; voltage on the winding of the 5 transformer a 3. Since dp of the first pooperiod W b in dp of the second. Wj (3), where W HWj is, respectively, the number of turns of the windings 7 8 of transformer 3, then substituting AND expressions (2) and (3) into expression (1) of the value I, we obtain respectively IbelSJ /, VI-IQ aba, s.Wa 131, - 10 Thus, the duration of each va of the periods of the output voltage is inversely proportional to the corresponding input voltage. Maximum input voltages are determined from the expressions. By varying the number of turns of the additional windings 7 and 8 of transformer 3, it is possible to work at any input voltage values and any conversion factors. If necessary, have a long. both popupperiodov output voltage, depending on a single input, you will need to combine the converter inputs. DETAILED DESCRIPTION OF THE INVENTION DC-to-AC voltage measuring transducer, containing a generator of alternating voltage J, manufactured according to Royer’s scheme, which is aimed at expanding the functional ones; Owing to the possibility of obtaining the duration of both half-period output voltage inversely proportional to the first and convertible voltage, respectively, it is weak. two; additional rb-. in coils, the first outputs of which are connected to the sources of transformed DC voltages, and the second outputs through counter-connected diodes - it to the bases of the generator transistors. Sources of information taken into account during the examination: 1. Author's certificate hfe 287307, MKI q O1 R 19/26, 1968.

2. Author's certificate number ZO4v9O, cl. N OZ K 13 / 2O, JL969,

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