Inductance measurement using the Power Choke Tester DPG series

For all inductive power components

Power Choke Tester DPG Series

Power Choke Tester DPG Series

The large-signal impulse measuring method provides a complete inductance curve as a function of the current L(i) or as a function of the applied time-voltage-integral L(∫Udt). Thus the saturation characteristics of the power inductor can be seen clearly at a glance.

Besides the differential inductance and the amplitude inductance a lot of other variables can be measured.

Meanwhile our Power Choke Tester DPG10 series is established worldwide as a standard measurement instrument in development, production and quality control of inductive power components.

Specifications

  • Measurement of the differential inductance Linc(i) and the amplitude inductance Lsec(i)
  • Measurement of the flux linkage ψ(i) and the magnetic co-energy Wco(i)
  • Measurement of the DC resistance
  • Calculation of the flux densitiy B(i)
  • By means of the optional 3-Phase Extension Unit also suitable for 3-phase chokes
  • More realistic measurement results compared to small signal measurement with DC bias or 50/60 Hz mains current measurement

Applications of  inductance measurement

  • Development, research and quality inspection
  • Routine tests of small batch series and mass production
  • Very wide current range from <0.1 A up to 10000 A => suitable for all inductive components from small SMD inductors to very large power reactors in the MVA range, e.g.
    • Filter inductors for switch mode power supplies, DC/DC converters etc.
    • Filter inductors for uninterruptible power supplies, inverters etc.
    • Power chokes for PFC etc. and commutation inductors
    • Suppression chokes and Current compensated chokes
    • Solenoids, coils of valves
    • Transformers for flyback converters
    • Power transformers, motors
    • and much, much more inductive components

Power Choke Tester DPG10

Measuring current 0.1 A to 10000 A

Advantages

  • very easy and quick measurement
  • Lightweight, portable and affordable price-point despite of the high measuring current up to 10000 A
  • high sampling rate and very wide pulse range => suitable for all core materials

Pulse energy µJ to 15 kJ

Powerfull software

  • Easy and intuitive operation via a user-friendly graphical user-interface
  • Measurement results shown as diagram and as table
  • Measurement report in pdf-format, data export and data storage (XML, CSV)
  • For routine tests in mass production the instrument can be integrated easily in automated test environments by means of a DLL or by LabView

If required we assist you with integrating the DPG10 series in your specific test environment.

Power Choke Tester Software Application

Measuring Principle

The DPG10 works on the principle that a constant DC voltage is applied to the test inductor, which corresponds to the inductor’s real operational conditions. This will result in a current ramp in the test component, whose dt/di slew rate is subject to inductance. If the pre-set maximum current limit is reached, the measurement impulse is cut off.

By making calculations based on the profile of the measurement current, a complete inductance curve L(i) for the test component can be produced by taking a single measurement. In addition to the differential inductance Linc(i) and the amplitude inductance Lsec(i), the flux linkage ψ(i) and the magnetic co-energy Wco(i) can also be obtained from the measurement pulse. By entering the geometric core data the magnetic flux density B(i) can be determined too.

Produkte Prinzipschaltbild

3 Phase Extension Unit

3-Phase Extension Unit

The 3-Phase Extension Unit is an additional unit for the Power Choke Tester DPG10 series.
With the help of the 3-Phase Extension Unit the inductance of 3-phase chokes can be measured simply and quickly.

All three coils of the choke are automatically measured in succession without changing the connections of the test specimen.

The software takes into account the changed flux conditions in the core compared to a 3-phase sinusoidal current feed and corrects the measurement results accordingly using a sophisticated algorithm.

In relation to the measurement with 50 Hz mains voltage, this method is much simpler, faster and also more accurate.

software updates included

With the purchase of a Power Choke Tester of the DPG series you always receive the current software version for your device generation at no additional cost from our support.

uo to 4 year warranty

Trust in the quality of the market leader for inductance measuring devices based on the pulse measurement method. We grant you 4-year warranty in Europe and worldwide 2-year warranty for your Power Choke Tester.

Competent consulting

Do you have technical questions about inductance measurement? We will be happy to advise you in detail and in depth, by request using our contact form or by email to info@ed-k.de.