Efficiency analysis between an IGBT controller and a mosfet controller

Motor/ Inverter connection diagram. I used the second motor as a generator and to dump the energy i used water heaters seen in a picture below.
I use a state of the art Power Analyzer PA3000 from Tektronix with 0.04% accuracy.


My small setup for testing motors and controllers, I have a very precise torque sensor with 0,01% accuracy from Datum Electronics UK.
Range is 0-500Nm and up to 8000 RPM



Paul Open source controller test results, using water cooling plate and 400AMP IGBT modules. Encoder angle was fine tuned until i got the best performance.
Advanced angle Id current was adjusted but without any practical improvement.

Orange wave is phase voltage, and green line represents the current.
Using Paul Open source controller

95 % motor efficiency achieved at only 10-20% load using IGBT driver.
IGBT inverter at 10khz has 87,8% measured efficiency.
The controller is using encoder signals ABI, form AS5047 encoder



Open source controller used to run my RED 130 motor in sensorless mode

Vesc open source controller driving the motor in sensorless mode.
The controller has automatically detected all the motor parameters including: Internal resistance, Inductance, Flux Linkage, Kp, Ki and observer gain
Results using Vesc controller using in sensorless mode.
As we can observe the inverter efficiency is much better since is using mofets instead if the IFBT`s. The drive PWM frequency was set to 20khz.
The motor efficiency is also better because the sinewave generated is much closer to a pure sinewave. The torque per amp constant in this case was better from 0,14Nm/Arms to 0,22Nm/Arms
Waveforms for all the 3 phases and the currents
Voltage Harmonics.

To be continued…