AirC100/200/500 series double-pulse test inductance | IGBT/SiC device dynamic parameters

The AirC100/200/500 series is a dedicated device specifically designed for devices such as IGBT and SiC MOSFET. It is mainly used in single-pulse, switching, and continuous scenarios to evaluate the switching characteristics, losses, and safe operating area of devices. 

In double-pulse testing, the load inductor must withstand a current rapidly rising from zero to several hundred or even several thousand amperes pulsed current. If an inductor with a magnetic core is used, the large current can easily cause the core to saturate, leading to a sharp decrease in inductance, which in turn causes waveform distortion and invalid measurement results.

air-core inductorDue to the absence of magnetic materials,The magnetic saturation phenomenon does not exist, the inductance remains highly linear and stable over an ultra-high current range; at the same time, it has no hysteresis loss or eddy current loss, and possesses extremely highThe Q value and frequency response characteristics are ideal loads for high frequency and large current dynamic testing.

Inductance level

Parameters：AirC100Provide10μH-200μH（5file),AirC206HCProvide10μH-200μH（6file),AirC508Provide10μH-500μH（8File).

In double-pulse testing, the inductance determines the slope of the current rise (di/dt ≈ V/L). Different bus voltages and target test currents require matching different inductance values.The multi-gear adjustable design allows a single device to cover a variety of testing requirements from low current to high current and from low voltage to high voltage, without the need to change the inductor.

Maximum pulsed current

AirC100Support2000A/100μS；AirC206HCSupport4000A/150μS；AirC508Support3000A/150μS。

Represents the ability of an inductive coil to withstand peak current in an extremely short time without damage or changes in characteristics. This directly determines the maximum test current rating of the device under test. For example,4000AThe pulsed current capability is sufficient to cover the current high powerIGBT,Module andSiCThe extreme testing requirements of the device.

Maximum operating voltage and insulation resistance

Maximum operating voltage of the entire series≥7000Vpk，

insulationResistor≥ 13 × 10¹³ Ω(@7KV)。

double-pulse testingIt often operates at a bus voltage of several thousand volts, and the switch can generate extremely high voltage overshoot (surge voltage) instantaneously.7000VThe high voltage resistance and extremely high insulation electrical resistance ensure the electrical safety of the inductor under high voltage testing, preventing breakdown discharge and protecting the safety of operators and equipment.

DC resistance (DCR)

Each gearDCRfrom8.8 mΩto300 mΩDo not wait.

Parasitic resistance will consume the energy stored in the inductor and cause heating. Accurate and relatively lowDCRHelps reduce energy loss during the follow-up current period, lowers inductor heating, thereby ensuring the authenticity of the test waveform (reducing damping), and at the same time reduces thermal accumulation during continuous testing.

Structural Design and Material Advantages

Low-heat alloy copper coilUsing custom materials to ensure reliable electrical connections under high current impact, while optimizing heat dissipation performance to guarantee internal thermal stability.

High purityPEShell: Provides high-strength mechanical support and excellent insulation performance, ensuring stable inductance parameters at high frequencies while also meeting high-voltage safety standards.

Center tap and radial distribution terminals: usingM6Standard screw terminals, with terminals of different sensitivities uniformly distributed in a fan shape. This design allows testers to quickly switch positions, and the connections are secure, suitable for high-current connections.

Size and Compatibility

This series of inductors adopts a compact cylindrical design, with a load-bearing chassis diameter22 cm, main diameter12cm, the height varies depending on the model15 cmto50 cmbetween. This design allows it to be easily integrated into existing double-pulse testing platforms (such as JectronicPD-200XIn the system) or test cabinet, saving laboratory space.

Safety Operation Instructions

Strictly forbidden to operate with power on: Before switching gears, power supply must be disconnected.

Energy releaseAfter the experiment is completed, the inductor and the system capacitor must be thoroughly discharged before subsequent operations can be carried out.

Specialized tool: Gear shifting must comply withCATIII 1000VStandard high-voltage insulation tool.

Personnel QualificationsOperators must have electrical safety qualifications.