GB1204894A - Electric bridge circuit for measuring the impedances of inductors - Google Patents
Electric bridge circuit for measuring the impedances of inductorsInfo
- Publication number
- GB1204894A GB1204894A GB4575767A GB4575767A GB1204894A GB 1204894 A GB1204894 A GB 1204894A GB 4575767 A GB4575767 A GB 4575767A GB 4575767 A GB4575767 A GB 4575767A GB 1204894 A GB1204894 A GB 1204894A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- impedance
- resistance
- standard
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
1,204,894. Measuring bridge circuits. A.Y. ESSENSON AND A.A. MORACH. Oct.6, 1967 No.45727/67. Heading G1U. In a transformer ratio arm bridge for measuring impedance components of an inductor 5 carrying a direct current of given value, the two secondary windings 3, 9 of a voltage transformer 1 form parts of the bridge and are respectively connected across an unknown impedance circuit in which the inductor 5 is connected and a standard impedance circuit, the primary, of the voltage transformer being connected to feed the bridge from an A.C. source. The standard impedance circuit incorporates an assembly 13 of a standard inductance 14 and standard resistances 15, 16, 17 switchable at 18 for measuring either series or parallel components of the inductor under test. A variable potentiometer 12 is connected across the secondary 9. A battery 6 supplies the required D.C. to the inductors while the voltage across the unknown impedance circuit is assessed by meter 8. A current transformer 2 has two primaries forming parts of the unknown and standard impedance circuits respectively, and an indicator is connected across the output secondary of this transformer. In operation, the reactive part of the unknown impedance is balanced by adjusting the potentiometer 12, and the resistive part by adjusting either resistance 15, 16 or 17 depending on which is connected in circuit. The arrangement of components within the assembly 13 is set in accordance with the type of impedance 5 being measured, and comprises either resistance 15 in series with inductance 14, or alternatively resistance 16 in parallel with inductance 14 with resistance 17 connected into the transformer winding 11. Balance is observed on an indicator across the secondary of current transformer 2. Resistance 19 and inductance 20 enable the residual reactance of winding 9 to be compensated, while a phase shift circuit 21 enables spurious phase shifts to be compensated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4575767A GB1204894A (en) | 1967-10-06 | 1967-10-06 | Electric bridge circuit for measuring the impedances of inductors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4575767A GB1204894A (en) | 1967-10-06 | 1967-10-06 | Electric bridge circuit for measuring the impedances of inductors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1204894A true GB1204894A (en) | 1970-09-09 |
Family
ID=10438464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4575767A Expired GB1204894A (en) | 1967-10-06 | 1967-10-06 | Electric bridge circuit for measuring the impedances of inductors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1204894A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225784A (en) * | 1991-02-25 | 1993-07-06 | National Research Council Of Canada | DC Current comparator circuit for generating an adjustable output proportional to an input signal |
| RU2475764C1 (en) * | 2011-09-01 | 2013-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Юго-Западный государственный университет" (ЮЗГУ) | Bridge meter of bipoles parameters |
| CN111505358A (en) * | 2020-04-30 | 2020-08-07 | 常州市致新精密电子有限公司 | Inductor direct current bias current source test equipment |
-
1967
- 1967-10-06 GB GB4575767A patent/GB1204894A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225784A (en) * | 1991-02-25 | 1993-07-06 | National Research Council Of Canada | DC Current comparator circuit for generating an adjustable output proportional to an input signal |
| RU2475764C1 (en) * | 2011-09-01 | 2013-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Юго-Западный государственный университет" (ЮЗГУ) | Bridge meter of bipoles parameters |
| CN111505358A (en) * | 2020-04-30 | 2020-08-07 | 常州市致新精密电子有限公司 | Inductor direct current bias current source test equipment |
| CN111505358B (en) * | 2020-04-30 | 2022-06-14 | 常州市致新精密电子有限公司 | Inductor direct current bias current source test equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |