First Steps: How Dynamometer Tests Confirmed the Future of Our Technology
The story of how test curves from the University of Bologna turned theoretical winding calculations into proven performance.

When developing or adopting a new technology, theoretical calculations only take you so far. The defining moment comes when real-world dynamometer data either validates your vision or breaks it.
For me, that turning point came when comparing test results from the University of Bologna with our own rewound motor technology. It was the moment all doubts vanished: the technology was not only viable, but carried immense commercial potential.
Bologna University Motor

Fig 1. Baseline OEM Motor (54 kg)

A heavily engineered 54 kg motor featuring a copper rotor and custom drive controller. The photo also shows the size comparison via the mounting flange and protective frame.
AEG Motor Test Bologna

Fig 2. Tested AEG Motor (27 kg)

A standard 3 kW off-the-shelf motor with manufacturing imperfections, rewound with combined windings.
Baseline Setup: Heavyweight OEM vs. Rewound Industrial Unit
To understand the significance of the test, consider the stark contrast between the two competing motors:
Baseline OEM Motor
• Weight: 54 kg (2x heavier)
• Build: Copper rotor, custom-tuned VFD
• Claimed Peak: 130 Nm torque
Our Motor (Combined Winding)
• Weight: 27 kg (standard industrial)
• Condition: Used, rotor skew alignment flaws
• Modification: Stator rewind only
What the Bologna Test Curves Revealed
When analyzing pages 3 and 4 of the University of Bologna test report against our dynamometer data, the dynamic torque curves revealed an unexpected result:
Bologna Test Report Graph

Fig 3. OEM Torque Curve Drop-off

Rapid torque degradation of the 54 kg OEM motor as rotational speed increased.
Torque Convergence Graph

Fig 4. Speed Convergence

Torque output of the 27 kg rewound motor matching the 54 kg motor past 2,000 RPM.
  1. Torque Drop-Off in Dedicated OEM Setup: The 54 kg motor's rated peak torque of 130 Nm degraded rapidly as soon as rotation began, suffering a steep decline early in the RPM range.
  2. High-RPM Convergence: By the time both motors reached 2,000 RPM, the torque output of the heavy, high-spec OEM motor plummeted to match the output of our lightweight 27 kg rewound motor.
Key Insight: Achieving high initial performance with a clean-sheet design where the motor and drive are custom-built at great expense is one thing. Achieving equal operational performance using an off-the-shelf industrial motor—rewound with combined windings despite structural imperfections—is proof of superior underlying electromagnetics.
Why This Validated Our Path
Seeing a 27 kg motor hold its ground against a 54 kg copper-rotor motor past 2,000 RPM demonstrated that the primary performance advantage lies in the electromagnetic efficiency of the winding configuration itself, rather than raw material mass or expensive custom drives.
These test graphs provided definitive proof: combined winding technology was not just a successful experiment, but a transformative breakthrough ready for commercial deployment.