E-mobility inverter end-of-line auxiliary test bench

Manual loading and secure positioning

The operator manually inserts the 6-phase 48 V inverter into the holder and aligns it using centering pins. As soon as the lift door is closed and the start button is pressed, the test specimen is automatically secured in place. This ensures that the inverter is held in the correct position in a reproducible manner throughout the entire test run.

Automatic contacting and cooling connections

After clamping, the system takes over the contacting. The cooling connections are automatically fed, followed by the high-voltage DC and AC connections. The AC phases are contacted on both sides, while the DC side is connected via a highly compact spring contact solution.
This results in reliable contacting in a confined space with:

• Double-sided connection of the six AC phases
• DC contacting via spring contacts on a small surface area
• Automatic delivery of all interfaces
• Stable clamping technology for secure positioning of the test specimen

Fully automatic test sequence

Once the inverter is fully connected, the automatic test sequence starts. The following tests are performed in a continuous process:

• insulation test
• communication and hardware checks
• functional testing under defined operating conditions

All steps are performed without any further action by the operator. The system monitors the status and displays the current test step and any malfunctions on the screen and via signal lights.

Evaluation and feedback to the operator

Once the test run is complete, all contacts are disconnected and the inverter is released. The result is displayed on the screen, and the measurement and process data are stored in autfactory, where they are available for traceability and evaluation purposes. The operator can remove the tested inverter and insert the next test item.