A Bench Built for Power Modules
Applying a power module correctly is as important as choosing the right part. To support customers more effectively, BeiLuo has opened an FAE verification bench dedicated to Semikron SEMITRANS and SEMiX IGBT modules. The bench lets our engineers measure gate waveforms, switching loss, turn-off overshoot and thermal behaviour before a customer commits to a design, turning advice into evidence rather than opinion. A module is the component that decides the losses and the reliability of a converter, so measuring it directly is one of the most useful things a distributor can do for a customer.
What We Measure
The bench is equipped with high-bandwidth oscilloscopes, differential probes, current sensors, a thermal stage and a double-pulse test rig. Engineers characterise the gate-drive behaviour, measure the turn-off overshoot at the module terminals, and quantify the switching energy across current and temperature for a chosen gate resistor. They also validate the protection sequence, including short-circuit detection and soft shutdown, by injecting a controlled fault. Measuring at the module terminals matters because the device sees the peak, not the bus, and a design that looks safe at the bus can still exceed the module rating at the terminals.
Gate Drive and Switching Loss
Gate drive characterisation begins with the gate waveform. The engineers measure the turn-on and turn-off transitions, the ringing amplitude and the switching energy, then derive a gate resistor value that balances switching loss against overshoot for the customer target. Because Semikron modules are driven by matched SKYPER or SKHI drivers, the recommendation is a practical starting point that the customer can reproduce on their own bench, and the double-pulse rig lets us confirm the loss before the converter is built.
From Selection to Validation
When a customer asks which module suits their application, our FAE team can now validate the recommendation on the bench. We compare a SEMITRANS module against a SEMiX module, compare a Gen 7 chip against an earlier generation, and confirm that the chosen module delivers the current without exceeding the junction temperature. The result is a design path backed by measured data, which reduces the risk of late-stage surprises and shortens the path from concept to production.
Thermal Validation
Thermal design is often where converters fail. The bench measures the case temperature under load, letting us verify the heatsink sizing against the module junction-to-case thermal resistance and the customer ambient. For a high-current module, this validation is especially valuable, because a marginal thermal path can derate a design severely and force an unnecessary redesign late in the project. The measurement also confirms the interface material and the mounting torque.
Three-Level Validation
As more converters move to three-level topologies, the bench lets us check the modules in the topology they will actually run in, where the switching stress is shared across more devices. That is where a paper estimate can mislead, and where a direct measurement of the junction temperature and the output waveform pays off. The bench supports the deeper loss and timing checks that a three-level design needs.
Supporting Customers Remotely
Not every customer can send hardware, so the bench also produces reference data that our team shares directly: recommended gate-drive values, expected switching energy and thermal headroom for common module and topology combinations. This shortens customer bring-up and lets design teams start from a known-good baseline, then fine-tune on their own bench. Over time, this reference data becomes a library that shortens the path for every new customer in the same power class.
A Lab That Answers Questions
The purpose of the bench is not to look impressive but to answer the questions customers actually ask: which module, which driver, which gate resistor, and how much overshoot should I expect. A lab that answers those questions with measurement is what turns a component distributor into an engineering partner, and it is the standard BeiLuo intends to hold for Semikron customers through 2026.
Bring-Up Support in Practice
In practice, the bench shortens bring-up in a predictable way. A customer sends the bus voltage, the module and the topology; the engineers propose a module and driver, set the gate resistor and measure the switching energy and the junction temperature. The customer then reproduces the result on their own hardware, starting from a known-good baseline rather than a blank page. For teams without a dedicated power-electronics lab, that support is often the difference between a design that ships on schedule and one that stalls in validation.