DEP0020119DA - Wattmeter - Google Patents
WattmeterInfo
- Publication number
- DEP0020119DA DEP0020119DA DEP0020119DA DE P0020119D A DEP0020119D A DE P0020119DA DE P0020119D A DEP0020119D A DE P0020119DA
- Authority
- DE
- Germany
- Prior art keywords
- wattmeter
- iron
- frequency
- magnetic circuit
- parts
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000005291 magnetic effect Effects 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Description
Der Erfindungsgedanke bezieht sich auf ein Wattmeter für Gleich- und Wechselstrom bis in das Gebiet der Hochfrequenz, das in Form eines D'Arsonval'schen Drehspulsystems aufgebaut ist. Derartige Systeme haben als Wattmeter bereits in der Form Eingang in die Technik gefunden, dass der übliche Permanentmagnet durch einen Elektromagneten ersetzt wird, dessen Erregungswicklung z.B. den Spannungspfad des Leistungsmessers darstellt.The idea of the invention relates to a wattmeter for direct and alternating current up to the area of high frequency, which is constructed in the form of a D'Arsonval moving coil system. Such systems have already found their way into technology as wattmeters in the form that the usual permanent magnet is replaced by an electromagnet, the excitation winding of which represents the voltage path of the power meter, for example.
Erfindungsgemäss werden diejenigen Teile eines solchen Messwerkes, die den magnetischen Kreis schliessen, aus Pulvereisen (auch Hochfrequenzeisen oder nach der gebräuchlichen Herstellungsmethode Carbonyleisen genannt) hergestellt, so dass die im Gebiet höherer Frequenzen besonders störend in Erscheinung tretenden Wirbelstromverluste (quadratische Zunahme mit der Frequenz) auf diese Weise niedrig gehalten werden können. So entsteht ein Messgerät, mit dem elektrische Leistungsmessungen vorgenommen werden können bis zu Frequenzen, für die noch quasistationäre Verhältnisse innerhalb der Messwerkinduktivität und -Kapazität vorliegen.According to the invention, those parts of such a measuring mechanism that close the magnetic circuit are made from powder iron (also called high-frequency iron or carbonyl iron according to the customary manufacturing method), so that eddy current losses (quadratic increase with frequency) appear particularly disturbing in the area of higher frequencies this way can be kept low. The result is a measuring device with which electrical power measurements can be made up to frequencies for which there are still quasi-stationary relationships within the measuring mechanism's inductance and capacitance.
Die Zeichnung veranschaulicht den erfindungsgemässen Sachverhalt. Die Drehspule ist mit 1 bezeichnet, der Rundkern 2, die Polschuhe 3 und das Joch 4 sind die aus Pulvereisen hergestellten Teile des magnetischen Kreises.The drawing illustrates the situation according to the invention. The moving coil is denoted by 1, the round core 2, the pole pieces 3 and the yoke 4 are the parts of the magnetic circuit made of powder iron.
Claims (1)
Family
ID=
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