MAG-TD200

In case of alternating field the system uses the following test circuits: Epstein frame, SingleSheetTester, yoke for sample with dimensions (280x30) mm, yoke for sample with dimensions (100x100) mm and toroidal sample. There is also a possibility to use another test circuits according to customer's requests. When test circuits, mentioned above are equipped with appropriate sensors, the system allows measuring dynamic magnetic properties based on indirect or direct measurement of magnetic field strength. The system is able to measure the properties of ferromagnetic materials in alternating field with simultaneous determination of field strength by direct and indirect method, as well.

Yoke for measurements in rotational field
In case of rotational field the measurement of magnetic field strength is realized by direct method by means of following sensors: flat coil, Rogowski coil or Hall's sensor. When the yoke of magnetizing circuit and the sample are closed circuit, the system allows measuring dynamic magnetic properties based on indirect or direct measurement of magnetic field strength, likewise on indirect and direct measurement of magnetic field strength simultaneously. The sample is magnetized by appropriate yokes with "U" shape. These yokes are equipped with permeance regulator for two magnetizing channels. The magnetizing circuit can be made in different ways according to customer's requests.

Relative magnetic permeability in rotational field Hodograf Hx=f(Hy) The set of hysteresis loop in rotational field Electric signal in rotational field Fourier analisys The set of hysteresil loop in alternating field Magnetisation curve in rotational field in one channel Magnetisation curve in alternating field with data of sample temperatures

MAG-TD200 system provides measuring and determination of:

»   peak value of field strength H_m [A/m]

»   effective value of field strength H_eff [A/m]

»   coercive field strength H_c [A/m]

»   peak value of polarization B_m [T]

»   peak value of induction J_m [T]

»   effective value of polarization B_eff [T]

»   effective value of induction J_eff [T]

»   remanence J_r [T] (B_r [T])

»   specific core losses P_s [W/kg]

»   specific apparent losses S_s [VA/kg]

»   loss separation of hysteresis and eddy-current losses P_h, P_w [W/kg]

»   amplitudal relative magnetic permeability µA

»   initial permeability in Epstein frame 25 cm for: µA_pocz dla:

H_m = 0.4 A/m; f = 50 Hz

H_m = 1.6 A/m; f = 50 Hz

»   differential relative magnetic permeability µr

»   hysteresis loop for required value of polarization and magnetic field strength with full description of the parameters

»   the set of hysteresis loops for different values of polarization and magnetic field strength with full description of the parameters for each data point

»   anisotropy of induction (polarization) J [T] (B [T])

»   anisotropy of losses A [%]

»   specific core losses of mixed sample P_s [W/kg]

»   magnetizability of mixed sample J_m [T]

»   signals of voltage proportional to the sample induction and current as a function of time with full description of the parameters for each data point

»   signals of polarization and magnetic field strength as a function of time with full description of the parameters for each data point

»   Fourier series distribution with full description and spectral lines diagram (for each measuring point) for function of magnetic field strength, polarization, specific core losses, specific reactive losses and specific apparent losses with determination of deformation losses

»   peak factor of field strength k_s

»   form factor of field strength k_k

»   automatic samples mass measurement

»   final setting of obtained results

In case of rotational fields all of the above characteristics are measured and determined for two channels x and y simultaneously.

Moreover, in rotational fields system MAG-TD200 provides measuring and determination of:

»   rotational losses P_r [W/kg]

»   an angle between H and B vectors [°]

»   hysteresis loop for required value of polarization:

J_x = f(H_x)

J_y = f(H_y)

J_y = f(J_x)

H_y = f(H_x)

J_y = f(J_x) i H_y = f(H_x) simultaneously with full description of parameters.

The system allows presenting any characteristic curves. All of the above magnetic quantities can be either independent or dependent value of drawing characteristic. The system provides the opportunity of a tabular and graphic presentation of the obtained data, which can be presented by means of monitor and printer with full description of measured object parameters. An important advantage of the system is the possibility of export of all obtained results along with all measured time courses of magnetic and electric signals. This feature enables an operator to perform any mathematical operations using programs compatible with Windows. By that means this option provides full freedom for mathematical analysis and graphical presentation of obtained results.
All of the above mentioned characteristics can be measured in the range of:

For alternating field:

»   frequency

resolution f = 0.01 Hz
(1÷10 000Hz)

setting accuracy
<= 0.1 %

»   magnetic field strength (for Epstein frame 25cm 50/60 Hz)

setting accuracy <= 0.3 %
(0.1÷15 000A/m)

»   polarization

step J = 0.05 T
(0.005÷2.5T)

setting accuracy
<= 0.1 %

For rotational field, with any elliptical degree:

»   frequency

resolution f = 0.01 Hz
(5÷800Hz)

setting accuracy
<= 0.1 %

»   polarization in depending on material being tested

step J = 0.05 T
(0.005÷1.6T)

setting accuracy
<= 0.3 %

»   magnetic field strength it depends on material being tested and air gap yoke-sample

The MAG-TD200 system is equipped with external amplifiers of signals proportional to the polarization and magnetic field strength in two measuring channels. The gains are equal 10, 100, 200, 500 and 1000. It is possible to use other values according to the Customer's request.

The measurements can be performed in the whole or in the closely restricted measuring range with required value of magnetic polarization (induction) or magnetic field intensity. The measurements may also be accomplished for defined values of magnetic polarization (induction) or magnetic field intensity. Magnetic field intensity or magnetic polarization (induction) can be independent variables in each case for alternating field. For rotational field the independent variable is induction. Demagnetisation of the sample can be omitted or included into the measuring procedure. The value of demagnetic field and time of demagnetisation are determined by operator

The whole measuring process as well as calibration procedure is fully automated. The measurements are performed with preservation of sinusoidal signal of magnetic induction differential. Allowed deviation of the form factor from sinusoid does not exceed 0.1% for alternating field. For rotational field it does not exceed 0.5 %. The measurements, which were performed in normalized range, fulfil IEC and EN standards.

It is also possible to perform researches for set tolerance values of:

Setting of the measuring quantity value,
Form coefficient.

Moreover the user can set the limitary value of magnetizing current.

TECHNICAL DATA

PDF version of MAG-TD200
83 kB

23-01-2009

DOC version of MAG-TD200
1.14 MB

23-01-2009

MAG-TD200 demo version (.exe)
6.68 MB

12-03-2006

MAG-TD200 demo version (.zip)
6.14 MB

12-03-2006

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