PL105773B1 - TRANSDUCER FOR MEASURING CURRENT VALUES IN MULTIPHASE SYSTEMS, FREQUENCY INDEPENDENT - Google Patents
TRANSDUCER FOR MEASURING CURRENT VALUES IN MULTIPHASE SYSTEMS, FREQUENCY INDEPENDENT Download PDFInfo
- Publication number
- PL105773B1 PL105773B1 PL18852676A PL18852676A PL105773B1 PL 105773 B1 PL105773 B1 PL 105773B1 PL 18852676 A PL18852676 A PL 18852676A PL 18852676 A PL18852676 A PL 18852676A PL 105773 B1 PL105773 B1 PL 105773B1
- Authority
- PL
- Poland
- Prior art keywords
- transducer
- core
- measuring
- current values
- measuring current
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase AC
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Transformers For Measuring Instruments (AREA)
Description
Przedmiotem wynalazku jest przetwornik do pomiaru wartosci pradów w ukladach wielofazowych, o dzialaniu niezaleznym od czestotliwosci, pozwalajacy przetworzyc wartosci pradów w przyblizeniu sinusoidalnie zmiennych na napiecie stale. Przez wartosc wielofazowego systemu pradów rozumie sie skuteczna wartosc pradów poszczególnych faz przy zalozeniu wielofazowej symetrii tych pradów.The subject of the invention is a transducer for measuring the value of currents in multi-phase systems, with an operation independent of the frequency, allowing to process the values of currents approximately with a sinusoidal constant voltage. The value of the multi-phase current system is understood to be effective value of the currents of individual phases assuming polyphase symmetry of these currents.
W dotychczasowej praktyce wartosc wielofazowego systemu pradów nie byla mierzona. W praktyce mierzono wartosc pradu w jednej albo w kilku fazach za pomoca przekladników lub przez pomiar spadku napiecia na bocznikach sprzezonych z miernikiem analogowym lub cyfrowym. Otrzymane wartosci zalezne byly od czestotliwosci pradów, a sam proces pomiaru odbywal sie osobno w kazdej z faz.Until now, the value of the multiphase current system has not been measured. In practice the value of the current was measured in one or more phases using transformers or by measuring the dip voltages on shunts connected to an analog or digital meter. The received values were dependent on the frequency of the currents, and the measurement process itself was carried out separately in each of the phases.
Celem wynalazku jest kontrolowanie wielofazowego ukladu pradów przy szybkich zmianach jego wartosci w ukladach o regulowanej czestotliwosci. Cel ten osiagnieto przez zastosowanie rdzenia blachowanego, zawierajacego co najmniej jedna blache i skladajacego sie z dwóch koncentrycznie osadzonych czesci, z których zewnetrzna ma ksztalt pierscienia a wewnetrzna pierscienia albo kola. Czesci te sa oddzielone od siebie szczelina, a jedna z nich ma przy szczelinie zlobki równomiernie rozlozone na obwodzie, w których ulozone jest wielofazowe uzwojenie wiodace mierzony uklad pradów. Dodatkowo na obwodzie jarzma nawiniete jest równomiernie uzwojenie pomiarowe nie sprzezone magnetycznie z wielofazowym uzwojeniem przetwornika.The object of the invention is to control the multiphase current system with rapid changes of its value in systems with adjustable frequency. This goal was achieved by using a sheet metal core, containing at least one plate and consisting of two concentrically seated parts, of which the outer is in the shape of a ring and the inner is a ring or a circle. These parts are separated by a slot, and one of them has grooves evenly distributed around the circumference in which it is located multiphase winding leading the measured current system. Additionally, the yoke is wound around the circumference evenly measuring winding not magnetically coupled with the multi-phase winding of the converter.
Zalety przetwornika wedlug wynalazku polegaja na tym, ze napiecie odwzorowujace wartosc wielofazowego zespolu pradów reaguje bez opóznienia na jego szybkie zmiany i nie zalezy od czestotliwosci pradu.The advantages of the transducer according to the invention are that the voltage corresponds to the value of a polyphase current complex reacts without delay to its rapid changes and does not depend on the frequency electricity.
Dodatkowa zaleta przetwornika jest jego prosta budowa oraz galwaniczne oddzielenie sygnalu od elektrycznego obwodu mierzonego ukladu pradów.An additional advantage of the converter is its simple structure and galvanic separation of the signal from electrical circuit of the measured current system.
Przetwornik do pomiaru wartosci pradów w ukladach wielofazowych wedlug wynalazku pokazany jest na rysunku, na którym przedstawiono przykladowo wycinek rdzenia przetwornika z fragmentem uzwojenia pomiarowego.2 105 773 Przetwornik wedlug wynalazku ma rdzen magnetyczny, który zawiera jedna albo kilka blach i zlozony jest z dwóch koncentrycznie osadzonych czesci, z których czesc zewnetrzna ma ksztalt pierscienia a wewnetrzna pierscienia albo kola. Czesci te oddzielone sa od siebie szczelina 5.A transducer for measuring the value of currents in multi-phase systems according to the invention is shown in The drawing shows, for example, a fragment of the transducer core with a fragment of a winding 2 105 773 According to the invention, the transducer has a magnetic core which includes one or more plates and is assembled with two concentrically placed parts, the outer part of which is ring-shaped and the inner part rings or wheels. These parts are separated by a slot 5.
Rystinek obrazuje przypadek, gdy uzwojenie pomiarowe 1 jest nawiniete na zewnetrznym jarzmie 2, a uzlobkowany jest równiez zewnetrzny pierscien rdzenia. W zlobkach 3 umieszczone jest wielofazowe uzwojenie, analogiczne do uzwojen stosowanych w silnikach indukcyjnych, wiodace mierzony uklad pradów.Rystinek shows a case where measuring winding 1 is wound on the outer yoke 2, and the outer ring of the core is also grooved. In 3 compartments there is a multiphase one winding, analogous to the windings used in induction motors, leading the measured current system.
Wzbudzone przezen pole magnetyczne przenika przez szczeline 5, zeby 4 i zamyka sie w jarzmach 2 i 6. Pole to nie kojarzy sie z uzwojeniem pomiarowym 1, lecz podsyca magnetycznie jarzmo 2, na którym to uzwojenie jest nawiniete.The magnetic field induced by it penetrates the slit 5, teeth 4 and closes in the yokes 2 and 6. This field is not associated with the measuring winding 1, but magnetically energizes the yoke 2 on which this winding is wound up.
Przy zmianach stanu nasycenia jarzma 2 uzwojenie pomiarowe 1 zasilane przemiennym napieciem pomiarowym odpowiednio duzej czestotliwosci, zmienia swoja impedancje, bedaca funkcja wartosci wielofazowego ukladu pradów. Uzyskiwane zmiany impedancji na zaciskach la uzwojenia pomiarowego 1 sa przetwarzane - np. w ukladzie mostkowym - na napiecie przemienne o czestotliwosci napiecia pomiarowego, które po wyprostowaniu i wygladzeniu moze byc wykorzystane do celów regulacyjnych.With changes in the saturation state of the yoke, 2 measuring winding 1 is supplied with alternating voltage appropriately high frequency, it changes its impedance, which is a function of the value multi-phase current system. Obtained impedance changes at terminals la of the measuring winding 1 sa processed - e.g. in the bridge circuit - into alternating voltage with the frequency of the measuring voltage, which, after straightening and smoothing, can be used for regulatory purposes.
Przetwornik moze byc wykonany w róznych wariantach konstrukcyjnych, a mianowicie uzwojenie wielofazowe wiodace mierzony uklad pradów moze byc umieszczone w zlobkach na zewnetrznej albo wewnetrznej czesci rdzenia. Podobnie uzwojenie pomiarowe 1 moze byc nawiniete na jarzmie 2 czesci zewnetrznej albo jarzmie 6 czesci wewnetrznej. Wszystkie powstale w ten sposób warianty konstrukcyjne przetwornika sa równowazne.The converter can be made in various design variants, namely windings multiphase leading measured current system can be placed in slots on the outside or the inside of the core. Likewise, the measuring winding 1 can be wound on the yoke of the 2 parts outer or yoke 6 inner parts. All the construction variants created in this way of the converter are equivalent.
Claims (3)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18852676A PL105773B1 (en) | 1976-04-05 | 1976-04-05 | TRANSDUCER FOR MEASURING CURRENT VALUES IN MULTIPHASE SYSTEMS, FREQUENCY INDEPENDENT |
| DE19772714717 DE2714717A1 (en) | 1976-04-05 | 1977-04-01 | Frequency independent instrument transformer - has split magnetic core with polyphase winding in core slots |
| JP3771077A JPS52121371A (en) | 1976-04-05 | 1977-04-04 | Transducer for measuring multiiphase current system having function independent of frequency |
| CA275,525A CA1069586A (en) | 1976-04-05 | 1977-04-04 | Transducer for the measurement of polyphase current independently of frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18852676A PL105773B1 (en) | 1976-04-05 | 1976-04-05 | TRANSDUCER FOR MEASURING CURRENT VALUES IN MULTIPHASE SYSTEMS, FREQUENCY INDEPENDENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL105773B1 true PL105773B1 (en) | 1979-10-31 |
Family
ID=19976294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18852676A PL105773B1 (en) | 1976-04-05 | 1976-04-05 | TRANSDUCER FOR MEASURING CURRENT VALUES IN MULTIPHASE SYSTEMS, FREQUENCY INDEPENDENT |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS52121371A (en) |
| CA (1) | CA1069586A (en) |
| DE (1) | DE2714717A1 (en) |
| PL (1) | PL105773B1 (en) |
-
1976
- 1976-04-05 PL PL18852676A patent/PL105773B1/en unknown
-
1977
- 1977-04-01 DE DE19772714717 patent/DE2714717A1/en not_active Withdrawn
- 1977-04-04 JP JP3771077A patent/JPS52121371A/en active Pending
- 1977-04-04 CA CA275,525A patent/CA1069586A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1069586A (en) | 1980-01-08 |
| JPS52121371A (en) | 1977-10-12 |
| DE2714717A1 (en) | 1977-10-20 |
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