SU142359A1 - Method for automatic balancing of an ac electric bridge - Google Patents
Method for automatic balancing of an ac electric bridgeInfo
- Publication number
- SU142359A1 SU142359A1 SU662581A SU662581A SU142359A1 SU 142359 A1 SU142359 A1 SU 142359A1 SU 662581 A SU662581 A SU 662581A SU 662581 A SU662581 A SU 662581A SU 142359 A1 SU142359 A1 SU 142359A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- bridge
- electric bridge
- automatic balancing
- balancing
- phase
- Prior art date
Links
Landscapes
- Control Of Multiple Motors (AREA)
Description
Насто щее изобретение относитс к способам автоматической балансировки электрического моста переменного тока по двум параметрамПредлагаемый способ отличаетс от известных тем, что параметры двух плеч моста модулируют с различными частотами, либо с одной и той же частотой и со сдвигом по фазе на 90°, а напр жени выхода моста подают на два электрических двигател , обмотки возбуждени которых питают переменными токами с различными частотами, соответствующими частотам модул ции, либо током одной и той же частоты, со сдвигом в 90° по фазе. При этом каждый из двигателей в отдельности используют дл регулировани одного из плеч моста и одновременного уравновещивани последнего по активной и реактивной составл ющим измер емого сопротивлени .The present invention relates to methods for automatically balancing an electric AC bridge in two ways. The proposed method differs from the known ones in that the parameters of the two arms of the bridge are modulated with different frequencies, or with the same frequency and phase shift of 90 °, and the voltage The outputs of the bridge are fed to two electric motors, the excitation windings of which are fed by alternating currents with different frequencies corresponding to the modulation frequencies, or the current of the same frequency, with a shift of 90 ° in phase. In this case, each of the motors is separately used to regulate one of the bridge arms and simultaneously balance the latter by the active and reactive components of the measured resistance.
Применение такого способа обеспечивает упрощение процесса балансировки мостаПа чертеже изображена схема балансировки моста по предлагаемому способу.The use of this method provides a simplification of the process of balancing the bridge. The drawing shows the scheme of balancing the bridge according to the proposed method.
В цел х раздельной индикации напр жений, определ ющих стеlieHb и знак разбаланса моста, составленного из сопротивлений Z,, Zj, 3 и Zi, по активной и реактивной составл ющим, параметры р q соответствующих плеч модулируютс различными некратными частотами или одной частотой, но со сдвигом по фазе в 90°.For the purpose of separate indication of voltages that determine the class Hb and the sign of the unbalance of the bridge, made up of resistors Z ,, Zj, 3 and Zi, along active and reactive components, the parameters p q of the respective arms are modulated by different non-multiple frequencies or one frequency, a phase shift of 90 °.
В частности, модул ци параметров р п q может осуществл тьс о г сети переменного тока посредством параметрических модул торов Л/,п Mfg, управл ющие напр жени которых сдвинуты по фазе друг относительно друга на угол 4 90°. Выходное напр жение моста, модулированное по амплитуде и фазе, подаетс на избирательный усилитель ИУ и затем - на детектор Д. После детектировани выдел етс его огибаIn particular, the modulation of the parameters p p q can be made on the ac network by means of parametric modulators A /, n Mfg, the control voltages of which are phase-shifted relative to each other by an angle of 4 to 90 °. The output voltage of the bridge, modulated in amplitude and phase, is applied to the selective amplifier of the DUT and then to detector D. After detection, its curvature is selected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU662581A SU142359A1 (en) | 1960-04-09 | 1960-04-09 | Method for automatic balancing of an ac electric bridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU662581A SU142359A1 (en) | 1960-04-09 | 1960-04-09 | Method for automatic balancing of an ac electric bridge |
Publications (1)
Publication Number | Publication Date |
---|---|
SU142359A1 true SU142359A1 (en) | 1960-11-30 |
Family
ID=48298221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU662581A SU142359A1 (en) | 1960-04-09 | 1960-04-09 | Method for automatic balancing of an ac electric bridge |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU142359A1 (en) |
-
1960
- 1960-04-09 SU SU662581A patent/SU142359A1/en active
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