Power Choke Tester DPG10 – Series

Large Signal Inductance measurement instruments
Power Choke Tester DPG – Family

Characteristics and Application Areas

The Power Choke Testers of the DPG10 family are innovative instruments for measuring inductance of all kinds of power inductors. The range of application covers small PCB mounted ckokes as well as large power inductors up to several 100kVA.

 

Induktivtätsdiagramm

The Power Choke Tester DPG10 series is available in different versions for different maximum measuring currents and pulse energy capabilities. The maximum level of current, which when exceeded causes the measuring impulse to be terminated, is adjustable. There are three measuring ranges.

Maximum measuring current
Model Range 1 Range 2 Range 3
DPG10 – 1000A 1 … 9A 10 … 99A 100 … 1000A
DPG10 – 1500A 1 … 9A 10 … 99A 100 … 1500A
DPG10 – 1500A/E 1 … 9A 10 … 99A 100 … 1500A
DPG10 – 3000B/E 3 … 30A 31 … 300A 301 … 3000A
DPG10 – 100A 0.1 … 0.9A 1.0 … 9.9A 10.0 … 100.0A

 

The models with option /E are able to provide more than twice the pulse energy compared to the other models (up to 2500J). Therefore they are also suitable for measuring very large power inductors.

The voltage applied to the test component can be adjusted within the range of 10V to 400V.

Operation and Software

A PC is used to operate and display results from the Power Choke Tester DPG10 via a simple and intuitive graphical user interface. The measuring instrument must be connected to the USB port or the RS232 port of the PC.

The following parameters can be set before measuring inductance:

  • Maximum current: The measuring impulse is terminated when this value is reached, so long as the pre-set maximum duration of the measuring impulse has not been reached before.
  • Measuring impulse voltage: A value should be entered here that corresponds to the test specimen’s voltage levels during normal operating conditions.
  • Maximum duration of the measuring impulse: The measuring impulse is terminated when this value is reached, so long as the maximum current level is not reached before.

All settings can be saved and reloaded when required. This considerably eases conducting a series of measurements for quality control checks during production.

If the instrument is incorrectly used (i.e. incorrectly connected or setup), then detailed error warnings help to quickly solve any problems.

After the measurements are complete, the results L(i) are displayed in the form of both a diagram and in a table. Alternatively in some cases it could be useful to display the inductance as a function of the voltagetime-integral ∫U(t)dt applied to the inductor. The display mode is togglable.

A resistance test is automatically carried out before every inductance measurement is undertaken because the ohmic portion of the inductor must be considered in the calculation of the inductance curve. A resistance test can also be carried out separately.

The PC software for the Power Choke Tester DPG10 is subject to continous improvement and contains a lot of additional functions, e.g.

  • Definition of limit curves for automatic pass/fail testing
  • Functions for ease of routine testing
  • Comparison of different measurement curves in one diagram
  • Data export and import

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