The Power Choke Tester DPG family is an innovative measurement instrument series for all inductive power components.
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 incremental inductance and the secant 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 incremental inductance Ldiff(i) and the secant inductance Lamp(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
Advantages
- very easy and fast measurement
- Lightweight, portable and affordable price-point despite of the high measuring current up to 10000 A
- High sample rate and very wide pulse width range => suitable for all core materials
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.
Applications
- Development, research and quality inspection
- Routine tests of small batch series and mass production
- Very wide current range from <0.1 A up to 10,000 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
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 (which displays the DC pre-magnetisation dependent inductance profile) for the test component can be produced by taking a single measurement. In addition to the differential inductance Ldiff (i) and the amplitude inductance Lamp (i), the linked flux ψ (i) and the magnetic co-energy Wco (i) can also be obtained from the measurement pulse. Further more the flux density B (i) can also be determined from the measurement pulse, after entering the geometric core data.
