Test Solutions for the Low-Altitude Economy
Programmable AC and DC sources, electronic loads, bidirectional source/sink systems, battery simulators, and modular measurement and I/O technology for aircraft, charging infrastructure, propulsion systems, BMS, avionics, and interconnection testing.
From charging to signal-level testing
Three levels for an end-to-end test solution
Low-altitude aircraft combine high-voltage power electronics, highly dynamic propulsion systems, precise battery systems, and complex control and communication signals. The test system must reproduce these levels reliably and support full automation.
Power Management
Precise simulation of cell voltages, total voltage, total current, temperature, insulation resistance, and I/O signals for battery, BMS, and controller validation.
Power Testing
Grid simulation, battery and load emulation, high-voltage loading, load transients, and bidirectional energy flow for charging, DC/DC, and propulsion systems.
Electronic Testing
Modular power, measurement, and signal simulation for flight control, avionics, sensors, relays, CAN communication, PWM, cables, and connectors.
Test technology across the complete electric aircraft
From external charging infrastructure and high-voltage distribution to propulsion, BMS, flight control, sensors, cables, and connectors, the key components of a UAV or eVTOL system can be reproduced using scalable instruments and modular platforms.
Charging Infrastructure & Chargers
Grid, input, output, efficiency, power-factor, protection, and short-circuit testing of charging infrastructure for large and small aircraft.
Onboard Charger (OBC)
Simulation of the AC supply and battery pack for inrush current, ripple, efficiency, power factor, load dump, and protection-function testing.
DC/DC Converter
HV and LV input simulation, output loading, static characteristics, quiescent current, overshoot, recovery time, and short-circuit protection.
PMU, PDU & BDU
Supply, distribution, and protection testing of low-voltage power-management systems, high-voltage distribution units, and battery disconnect units.
Aircraft Battery
Charge/discharge cycling, capacity, ageing, voltage, current, and temperature testing for individual cells, modules, and complete battery packs.
Motor Controller
Battery simulation, inrush, regenerative energy, reverse current, CV/CC priority, and dynamic DC-link supply for electric propulsion systems.
Flight Control & Avionics
Power supply, digital and analog I/O, CAN, relays, sensor excitation, measurement, and ground-offset testing for FCU, ECU, DCU, and VCU.
Aircraft BMS
Cell-voltage, total-voltage, current, temperature, insulation, and fault simulation for protection functions, SOC, balancing, and communication.
Harness & Connector
Dielectric strength, momentary interruption, short circuit, current cycling, overload, ageing, and temperature-rise testing of cables and connectors.
Intelligently combine source, DUT, load, and signals
Realistic energy flows on the AC and DC sides
For chargers, onboard chargers, and DC/DC converters, defined grid conditions, battery characteristics, and load profiles are combined. This enables reproducible testing of efficiency, power factor, start-up behavior, short circuit, overvoltage/undervoltage, and bidirectional operating modes.
From pack-level power to individual cell voltage
Bidirectional DC systems handle charge/discharge cycling and battery-pack simulation. Multi-channel battery simulators and modular measurement platforms add cell voltages, temperature-resistance simulation, total voltage, current-sensor signals, insulation resistance, fault scenarios, relays, and CAN communication.
Modular signal and measurement technology for complex electronics
NXI modules combine DAQ, relays, digital I/O, PWM, CAN, programmable resistors, and compact power functions. This creates scalable test systems for FCU, ECU, DCU, VCU, sensors, cables, and connectors—from the laboratory to end-of-line testing.
Core instruments for low-altitude test systems
The product range extends from bidirectional AC and DC systems and high-power loads to compact DC sources and multi-channel battery simulators. For complete test stands, the instruments are combined with measurement technology, switching matrices, safety equipment, and software.
N75500
Bidirectional AC/DC grid simulation for charging, OBC, and grid-interaction testing.
N35500
Battery and load emulation, charge/discharge cycling, and regenerative power testing.
N69200
Highly dynamic loading for chargers, DC/DC converters, batteries, and protection-function testing.
N35100
Bidirectional low-voltage source for small battery packs, PMU, DC/DC converters, and motor controllers.
N36200
Power supply for avionics, BMS, harnesses, and controllers with waveform, sequence, and automation functions.
N9000
Modular platform for cell voltage, total voltage, temperature, insulation, and fault simulation.
Which solution fits each test application?
The table provides initial guidance. The final configuration depends on voltage, current, power, power flow, dynamics, accuracy, interfaces, test standards, safety concept, and the required level of automation.
| Test Application | Recommended Solution | Typical Benefits |
|---|---|---|
| Charging Infrastructure / Charger | N75500 / N35500 / N69200 | Grid simulation, battery or aircraft emulation, output characteristics, efficiency, power factor, short circuit, and protection functions. |
| OBC / BOBC | N75500 / N35500 / N35100 / N69200 | AC input conditions, DC output, ripple, inrush, efficiency, load dump, A2G, and regenerative operation. |
| DC/DC Converter | N38300 / N36200 / N35100 / N69200 | HV/LV input simulation, output loading, quiescent current, overshoot, recovery time, and OVP, UVP, and short-circuit testing. |
| PMU / PDU / BDU | N35500 / N35100 / N69200 / NXI | Supply and load simulation, current cycling, power-up sequences, overload, ageing, fault detection, and protection logic. |
| Aircraft Battery | N35500 / N35100 / NXI DAQ / NP301 | Charge/discharge cycling, capacity, ageing, current, voltage, and temperature acquisition, plus safe battery-pack testing. |
| Motor Controller | N35500 / N35100 / NS81000 | Battery models, SOC profiles, regenerative energy, reverse current, start-up current, and stable DC-link supply with CV/CC priority. |
| Flight Control / Avionics | N36200 / N8361F / N2600 / NXI | ECU/FCU power supply, ground offset, sensor testing, digital and analog I/O, PWM, relays, CAN, and data acquisition. |
| Aircraft BMS | N9000 / N83624 / N36200 / NXI | Cell-voltage, total-voltage, current, temperature, insulation, and fault simulation for SOC, balancing, protection, and communication. |
| Harness & Connector | N36200 / N8150A / NXI-6100 / NXI-6501 | Momentary interruption, transient short circuit, current cycling, overload, temperature rise, and automated report export. |
| End-of-Line & Automated Systems | Customized Test Stand | Combination of source, load, battery simulator, DAQ, relays, CAN, safety technology, and test software for reproducible production testing. |
A structured path to the right low-altitude test solution
Send us your UAV, drone, or eVTOL test requirements
ET System supports you in selecting suitable AC/DC test equipment and designing complete test stands. For an initial system concept, we ideally need the key electrical specifications, power flow, required dynamics, interfaces, and test sequences.