Hello everyone,

We are testing electric motors in our production facility and would like to recover the energy generated during testing instead of dissipating it as heat.

The test bench power is approximately **11 kW**.

We are looking for practical advice on the best way to implement an energy regeneration system. For example:

* Returning energy back to the AC grid.
* Charging a battery energy storage system.
* Using a common DC bus with multiple drives.
* Other reliable and cost-effective solutions.

Our main goals are improving energy efficiency, ensuring reliable operation, and keeping the system practical for industrial use.

If you have experience with similar projects, could you share your recommendations? Which architecture would you choose for an 11 kW test bench, and what are the main advantages and disadvantages?

Thank you in advance for your suggestions.

 

I presume you are just testing the motor, anything used for mechanical load is not part of the test. A modular drive system should be able to be set up to achieve what you want. One drive for the test motor and one drive connected to another motor, maybe servo, maybe with forced cooling. The test motor would be mechanically coupled to the second second motor, this would be used as the load, it would be applying a torque in one direction but be driven in the opposite by the test motor, regenerating power into the modular drive which would have a common DC bus bar. No battery or feed to grid required, this would be mostly self sustaining with a small draw from the grid due to losses.