In the test rig used to demonstrate an electric motor test, we are using a torque transducer which is placed between the drive and the brake. With this test rig, we can control torque and speed to look at the different output states to imitate real world scenarios. The output of the torque and speed sensors are connected to our eDrive power analyzer which time aligns them with the voltage and the current signals. 

You also have the option to add other channels to measure temperature or vibration. The power analyzer can be connected to either a PC or a tablet for setup and data analysis in the eDrive software. The system could also be set up using software commands by utilizing our API. The splitter box connects the torque and speed outputs to the power analyzer and provides the possibility to repeat the signals for your automation system. 

For events like a load step shown in the middle of the screen, you can closely watch how the electrical system responds to a change in torque. This allows users to understand their motor at a system level. Electrical and mechanical data are averaged on the same time basis for doing power measurements.  This ensures that there is no shift between signals again maximizing accuracy. The eDrive system directly measures the frequency output of the torque sensor using high accuracy timer counter channels. The frequency signal can be shown zoomed in at the bottom of the screen. 

eDrive can average this frequency on a short time period shown in the middle screen at the full bandwidth. In the bottom screen, the torque averaging period is synchronized with the electrical signals for calculating highly accurate power and efficiency measurements. The ability to record the raw data and average it on unique time frames makes for the highest accuracy measurement, giving you the ability to trust what values you are getting.