GB635518A - Improvements in devices for measuring the harmonics produced in electrical equipment - Google Patents
Improvements in devices for measuring the harmonics produced in electrical equipmentInfo
- Publication number
- GB635518A GB635518A GB5564/48A GB556448A GB635518A GB 635518 A GB635518 A GB 635518A GB 5564/48 A GB5564/48 A GB 5564/48A GB 556448 A GB556448 A GB 556448A GB 635518 A GB635518 A GB 635518A
- Authority
- GB
- United Kingdom
- Prior art keywords
- harmonics
- oscillation
- equipment
- measuring
- electrical equipment
- 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
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
635,518. Analyzing harmonic distortion. COMPAGNIE INDUSTRIELLE DES TELEPHONES. Feb. 25, 1948, No. 5564. Convention date, Feb. 25, 1947. [Class 37] The invention relates to apparatus for measuring the harmonics produced in electrical equipment by feeding a substantially pure sinusoidal oscillation to the equipment and subjecting its output to harmonic analysis. According to the invention, the oscillation fed to the equipment is rendered free from harmonies by heterodyning an oscillation F, Fig. 1, with an oscillation f and passing the beat frequency F - # =#0 through a band-pass filter B centred on f1 which will attenuate beat frequencies produced by the harmonics of F and f, while the output is applied to a plurality of parallel band-pass filters B, C, D ... , Fig. 2, successively centred on the harmonic frequencies f1, 2f1, 3f1 ... , each filter C, D ... being followed by a heterodyning stage E, G ... to produce a beat frequency (which may be the same for all the channels) which is fed to bandpass filters B<1>, B<11> to eliminate harmonics other than that appropriate to the channel. Meters at M, N, P ... indicate the amplitude of the fundamental and harmonics.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR635518X | 1947-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635518A true GB635518A (en) | 1950-04-12 |
Family
ID=8994307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5564/48A Expired GB635518A (en) | 1947-02-25 | 1948-02-25 | Improvements in devices for measuring the harmonics produced in electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635518A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2456624C1 (en) * | 2010-11-09 | 2012-07-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" "СПбГУКиТ" | Device for measuring harmonic distortions of electric signal and derivatives thereof |
| RU2547166C1 (en) * | 2013-10-22 | 2015-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" (СПбГУКиТ) | Method to measure harmonic distortions of electric signal (versions) and device for its realisation |
| RU214156U1 (en) * | 2022-04-04 | 2022-10-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный институт кино и телевидения" (СПбГИКиТ) | Device for measuring non-linear distortions of an electrical signal with increased noise immunity |
-
1948
- 1948-02-25 GB GB5564/48A patent/GB635518A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2456624C1 (en) * | 2010-11-09 | 2012-07-20 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" "СПбГУКиТ" | Device for measuring harmonic distortions of electric signal and derivatives thereof |
| RU2547166C1 (en) * | 2013-10-22 | 2015-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет кино и телевидения" (СПбГУКиТ) | Method to measure harmonic distortions of electric signal (versions) and device for its realisation |
| RU214156U1 (en) * | 2022-04-04 | 2022-10-13 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный институт кино и телевидения" (СПбГИКиТ) | Device for measuring non-linear distortions of an electrical signal with increased noise immunity |
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