SU1370574A1 - Multiple-order high-frequency inductive voltage divider - Google Patents

Abstract

The invention relates to the field of measurement technology and can be used in the certification of multi-digit large-scale measuring transducers, in particular, in the complete testing of multi-decade 3S dual voltage dividers in the high-frequency domain. To do this, a three-pole multi-position switch 30, the reference winding 27 with the number of turns equal to the number of turns of one section of the separating winding, is introduced into the device. The drawing also shows ferromagnetic cores 1 and 13, excitation winding 2 with taps 3-12, separator winding 14 with taps 15-25, external conductors 26 of coaxial cable, terminal 28 of winding 27, terminal 29 of switch 30, terminals 31-35, inputs 36 and 37, connectors 38 and 39, AC source 40 and measuring means, for example, null organ 41. The invention improves the accuracy of multi-bit inductive voltage dividers in the high-frequency region by using equipotential protection of the pitch and reference windings. 1 il. c (L ro o ate BtijHl9f LJ

Description

The invention relates to a measuring technique and can be used in the certification of multi-bit mashshtabnyh measuring transducers, in particular for the complete verification of multi-decade inductive voltage dividers (IDNs) in the high frequency range.

The aim of the invention is to improve the measurement accuracy.

The drawing shows a diagram of a multi-bit high-frequency inductance. When connecting a split second divider input 37 via connector 39 to an AC source 40 and changing the position of switch 30 from the lower extreme to the upper extreme position with N 10, output voltages are received at terminal 29, respectively one; Oh, 2 ... 1.0, i.e. odnonogo divider.

The divider contains the first ferromagnet 15 bit transfer coefficients, the core core 1, the winding 2 is energized. If you connect the first input 36 of the divider through the connector 38 to the voltage source 40 and change the position of the switch 30 in the same way as in the previous case, then the devices receive output voltages respectively with transfer ratios 0.1111111 (1); 0,2222222 (2) ... 0.8888888 (8),

windings, pin 33 of a three-pole multi 25 1,000000, i.e. multi-bit coefficient switch, transfer factors.

34 and 35 of the excitation winding, the first due to the use in the device and the second inputs 36 and 37 of the divider, the co-equipotential protection of the reference drivers 38 and 39, the rewinding source 40 and thus the elimination of alternating current, the measuring current, 30 parasitic currents conductivities between

days with taps 3-12, second ferromagnetic core 13, separating winding 14 with taps 15-25, external conductors 26 of coaxial cable, reference winding 27 with pin 28, pin 29 of three-pole multi-position switch 30, also containing pin 31, pin 32 reference

excitation using pin 33 of switch 30.

The device works as follows.

When the split second input 37 of the divider is connected via the connector 39 to the AC source 40 and the position of the switch 30 changes from the lower extreme to the upper end position with N 10, output voltages with a transfer ratio of 0.1 are obtained at terminal 29; Oh, 2 ... 1.0, i.e. one thing

example null body 41.

On the ferromagnetic core 1 excitation winding 2 is made with taps 3-12. A coaxial cable is made on the coaxially mounted 35 ferromagnetic cores 1 and 13 with a coaxial cable 14. At this, the central wires of the coaxial cable

Sections of the separation and reference windings allow for the self-blocking of both single-digit and multi-digit gains obtained in the high-frequency region.

45

Calibration of both single-digit and multi-digit coefficients of the re-used to implement the divider of the cascade is the same, the winding 14 with taps 15-25. Out-of-process calibration of the taps 15–24 The coaxial cable's outer leads 26 are used to equipotentially protect the separator sections of the winding 14. The taps 3–12 of the excitation winding 2 are connected to the corresponding external wires of the coaxial cable. A coaxial cable is also used for the reference winding 27. One of the terminals 28 of the reference winding 27 and the terminal 31 of a three-pole multi-position switch 30 are interconnected. Their second terminals 32 and 29 are pre-thus, the invention is allowed to be connected to external ones to improve the accuracy of multi-digit measurement means 41, for example, 55 inductive voltage dividers in

high frequency areas due to the use of equipotential protection of the division and reference winding sections.

the separating winding 14 is conducted as follows.

Using the zero-body 41, the difference between the voltage of each section of the rotary divider and the fixed voltage of the reference source is determined, followed by the calculation of the relative error of any tap of the separating winding.

when calibrating. Pin 29 is also a device output. The equipotential protection of the reference winding 27 is also impacted against the winding 2.

Sections of the separation and reference windings allow for the self-blocking of both single-digit and multi-digit gains obtained in the high-frequency region.

Calibration of both single-bit and multi-bit transfer factors of a cascade is performed in the same way. The process of calibration of taps 15-24 Thus, the invention makes it possible to improve the accuracy of multi-bit inductive voltage dividers in

the separating winding 14 is conducted as follows.

Using the null organ 41, the difference between the voltage of each section of the rotary divider and the fixed voltage of the reference source is determined, followed by the calculation of the relative error of any tap of the separation winding.

Claims (1)

Invention Formula A multi-bit high-frequency inductive voltage divider comprising a cascade made in the form of a two-stage transformer on two ferromagnetic cores, one of which has an excitation winding with sectional taps, and the division winding is wound on both cores using N coaxial cables and has the same number of turns with excite the winding, the outer conductors of each coaxial cable are connected to the same wiring of the field winding, and the center wires are used to Separating winding, characterized in that, in order to improve the accuracy of dividing, a three-pole multi-position re74 the switch, the standard winding with the number of turns, the number of turns of one section of the separating winding, is made in the form of a central wire of an additional coaxial cable, the external conductor of which is connected to one of the three-pole multi-position switches of the excitation windings, one of the conclusions of the reference winding and a three-pole multi-position switch of the field winding, one of the conclusions of the reference winding and a three-pole multi-position switch of the field winding, one of the conclusions of the reference winding and a three-pole multi-position switch of the field winding, one of the conclusions of the reference winding and a three-pole multi-position switch of the field winding, one of the conclusions of the reference winding and a three-pole multi-position switch of the field winding; the windings are interconnected, and their other pins are connected to the input terminals, the first input of the divider is connected to the connected between At the inputs of the dividing winding and the field winding, the second input of the divider is connected to the interconnecting leads N and N-1 of the dividing winding and the field winding.