AT525785A2 - Single sheet tester with booster magnetization - Google Patents

Single sheet tester with booster magnetization Download PDF

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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
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Austria
Prior art keywords
booster
magnetization
single sheet
coil
detection area
Prior art date
Application number
ATA4/2022A
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German (de)
Inventor
Pfützner Dr Helmut
Original Assignee
Helmut Pfuetzner Dr
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Helmut Pfuetzner Dr filed Critical Helmut Pfuetzner Dr
Priority to ATA4/2022A priority Critical patent/AT525785A2/en
Publication of AT525785A2 publication Critical patent/AT525785A2/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/12Measuring 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)

Anspruch 1 — Single Sheet Tester, dadurch gekennzeichnet, dass an den Enden der Probe {1} statt einem Claim 1 - Single Sheet Tester, characterized in that at the ends of the sample {1} instead of one Jach sogenannte Booster-Magnetisierungsspulen (8) angeordnet sind, Anspruch 2 = Single Sheet Tester nach Anspruch 1, dadurch gekennzeichnet, dass zusätzlich zur B-Spuüle After so-called booster magnetization coils (8) are arranged, claim 2 = single sheet tester according to claim 1, characterized in that in addition to the B coil {5} zumindest eine Rand-B-Spule {7} montiert ist, um einen Boasterspannungs-Regier {11} {5} at least one edge B coil {7} mounted to provide a booster voltage regulator {11} ANZUSteUEIN, TO TAX,
ATA4/2022A 2022-01-07 2022-01-07 Single sheet tester with booster magnetization AT525785A2 (en)

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
AT525785A2 true AT525785A2 (en) 2023-07-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
ATA4/2022A AT525785A2 (en) 2022-01-07 2022-01-07 Single sheet tester with booster magnetization

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AT (1) AT525785A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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Effective date: 20231215