AT525785A2 - Single sheet tester with booster magnetization - Google Patents
Single sheet tester with booster magnetization Download PDFInfo
- Publication number
- AT525785A2 AT525785A2 ATA4/2022A AT42022A AT525785A2 AT 525785 A2 AT525785 A2 AT 525785A2 AT 42022 A AT42022 A AT 42022A AT 525785 A2 AT525785 A2 AT 525785A2
- Authority
- AT
- Austria
- Prior art keywords
- booster
- magnetization
- single sheet
- coil
- detection area
- Prior art date
Links
- 230000005415 magnetization Effects 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000006698 induction Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Zur Bestimmung von magnetischen Verlusten P von Elektrobändern beschreibt das Patent einen Single Sheet Tester, bei dem das standardisierte Magnetisierungsjoch durch an den Rändern der Probe (1) angeordnete Booster-M-Spulen (8) ersetzt ist. Im dazwischen gelegenen Detektionsbereich (4) wird die mittlere Induktion B durch eine B-Spule gemessen. Darüber hinaus wird die lokale Randinduktion B mittels einer Rand-B-Spule (7) gemessen. B und B werden verglichen. Bei zu geringem B erfolgt seine Anhebung durch Steigerung der Magnetisierung der äußeren Probenabschnitte durch die Booster-M-Spulen (8), im Sinne der Homogenisierung des Detektionsbereiches (4).The patent describes a single sheet tester for determining the magnetic losses P of electrical strips, in which the standardized magnetization yoke is replaced by booster M coils (8) arranged at the edges of the sample (1). In the detection area (4) in between, the mean induction B is measured by a B coil. In addition, the local edge induction B is measured using an edge B coil (7). B and B are compared. If B is too low, it is raised by increasing the magnetization of the outer sample sections by the booster M coils (8) in order to homogenize the detection area (4).
Description
Single Sheet Tester mit Booster-Magnetisierung Single sheet tester with booster magnetization
Die Erfindung betrifft magnetische Energieverluste von Elektrobändern, wie sie als Kerne elektrischer Maschinen. verwendet werden, und in zunehmenden Maße auch im Rahmen der e-Maobilität, Die Verluste: P {in W/kg} werden vor allem mit dem international JEC-standardisierten Single Sheet Tester {SST} bestimmt. Eine 50. cm lange und vorzugsweise auch 50 cm breite Materlalprobe wird durch eine Magnetisierungsspule (M-Spule} magnetisiert, wobei annähernde Homagenität durch ein Jochsystem erzielt wird. Problematisch ist, dass das Joch zur Verhinderung von Eigenverlusten äußerst massiv ausgeführt sein muss, mit Massen von hunderten Kilogramm. The invention relates to magnetic energy losses from electrical strips, such as those used as cores in electrical machines. The losses: P {in W/kg} are mainly determined with the internationally standardized JEC Single Sheet Tester {SST}. A material sample that is 50 cm long and preferably also 50 cm wide is magnetized by a magnetization coil (M-coil}, with approximate homogeneity being achieved by a yoke system. The problem is that the yoke must be extremely massive to prevent intrinsic losses, with masses of hundreds of kilograms.
Die Erfindung betrifft eine Anordnung, weiche die Masse des Testers extrem reduziert, Erzielt wird dies durch volle Einsparung des Joches, indem es durch so genannte Booster-Magnetisierungsspulen {BM-Spulen) ersetzt wird, Ohne sie würde die Probe ungenügende Homogenität der Magnetisierung aufweisen, indem die Induktion in Richtung der Probenenden stark absinkt. The invention relates to an arrangement which extremely reduces the mass of the tester. This is achieved by completely saving the yoke by replacing it with so-called booster magnetization coils (BM coils). Without them, the sample would have insufficient magnetization homogeneity, the induction drops sharply towards the ends of the sample.
Eine Vorbedingung zur neuen Vorrichtung ist ein Ersatz des so genannten Stromverfahrens {s. JECStandards 60404-3)} durch das Tangentialfeldspulenverfahren {s. z.8. [EEE Trans. Magni27, 778-785, 1991, LMagn.Magn. Mater, 215-216, 607-610, 2000}, bei dem die Feldstärke H der Prabe in direkter Weise detektiert wird. A prerequisite to the new device is a replacement of the so-called current method {s. JECStandards 60404-3)} by the tangential field coil method {s. z.8. [EEE Trans. Magni 27, 778-785, 1991, LMagn.Magn. Mater, 215-216, 607-610, 2000}, in which the field strength H of the prabe is detected in a direct manner.
Der Grundgedanke der Vorrichtung ist, die Erregung der Probenenden In gezielter Weise so Zu verstärken, dass im zentralen, etwa Zweidrittel der Probenlänge langen Probenbereich — als so genannter Detektionsbereich - annähernd konstante Induktion R auftritt, Erzielt wird dies, indem der neuartige Single Sheet Tester dadurch gekennzeichnet ist, dass an den Enden der Probe statt einem Joch sogenannte Booster-Magnetisierungsspulen angeordnet sind. In physikalisch konsistenter Weise werden zur Verlustbestimmung im Detektionsbereich sowohl die induktion 8 als auch die Feldstärke H detektiert, The basic idea of the device is to amplify the excitation of the sample ends in a targeted manner in such a way that an approximately constant induction R occurs in the central sample area, which is about two-thirds of the length of the sample - as the so-called detection area. This is achieved by using the new single sheet tester characterized in that so-called booster magnetization coils are arranged at the ends of the sample instead of a yoke. Both the induction 8 and the field strength H are detected in a physically consistent manner to determine the loss in the detection area,
Die gezielte Verstärkung der Erregung erfolgt vorzugsweise in vollautomatischer Weise mit Hilfe eines Computers, Er regelt die Spannung an den Booster-Spulen so ein, dass die Ränder des Detektionsbereiches eine Induktion 8 aufweisen, die mit der mittleren Induktion 8 des Detektionsbereiches übereinstimmt, Damit kann angenommen werden, dass der Detektionsbersich ausreichende Homogenität der Magnetisierung aufweist, Die Erfahrung zeigt, dass der erzielbare Grad der Homogenität zumindest jenem entspricht, wie er bei Einsatz eines Joches aufkommt. The targeted amplification of the excitation is preferably carried out fully automatically with the help of a computer. It regulates the voltage at the booster coils in such a way that the edges of the detection area have an induction 8 that corresponds to the middle induction 8 of the detection area that the detection area has sufficient homogeneity of the magnetization. Experience shows that the achievable degree of homogeneity corresponds at least to that which occurs when using a yoke.
Die Erfassung der Feldstärke H erfolgt durch zumindest eine Tangentfalfeldspule {H-Spule}, die den Detektiohsbereich fast vollständig bedeckt, Die Berechnung der Verluste P erfolgt in bekannter Weise The field strength H is detected by at least one tangent field coil {H-coil}, which almost completely covers the detection area. The losses P are calculated in a known manner
durch zeitliche Mittelung der zum Produkt & d8/dt proportionalen Momentan-Verluste, by temporal averaging of the instantaneous losses proportional to the product & d8/dt,
{13} berechnet, {13} calculated,
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA4/2022A AT525785A2 (en) | 2022-01-07 | 2022-01-07 | Single sheet tester with booster magnetization |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA4/2022A AT525785A2 (en) | 2022-01-07 | 2022-01-07 | Single sheet tester with booster magnetization |
Publications (1)
Publication Number | Publication Date |
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AT525785A2 true AT525785A2 (en) | 2023-07-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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ATA4/2022A AT525785A2 (en) | 2022-01-07 | 2022-01-07 | Single sheet tester with booster magnetization |
Country Status (1)
Country | Link |
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AT (1) | AT525785A2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1224402B (en) * | 1961-12-12 | 1966-09-08 | Licentia Gmbh | Device for the precise measurement of the loss factor and other magnetic properties of electrical steel sheets, especially in strip form |
CN201876536U (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets |
CN111308404A (en) * | 2019-12-25 | 2020-06-19 | 河北工业大学 | Two-dimensional magnetic characteristic measuring device under three-dimensional stress loading condition |
-
2022
- 2022-01-07 AT ATA4/2022A patent/AT525785A2/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1224402B (en) * | 1961-12-12 | 1966-09-08 | Licentia Gmbh | Device for the precise measurement of the loss factor and other magnetic properties of electrical steel sheets, especially in strip form |
CN201876536U (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets |
CN111308404A (en) * | 2019-12-25 | 2020-06-19 | 河北工业大学 | Two-dimensional magnetic characteristic measuring device under three-dimensional stress loading condition |
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