Efficiency Improvement of Electric Motor Drives Using Dynamic Motor Drive Technology 2022-01-0721
Tula Technology has developed a novel, patented motor control strategy called Dynamic Motor Drive (DMD®), which reduces the light-load losses of electric motor drives by intermittently pulsing motor torque. Since passenger vehicles frequently operate at light loads, DMD can significantly reduce the energy consumption of electric vehicles, extending their range. DMD is particularly beneficial for rare-earth-free or reduced-rare-earth permanent magnet (PM)-based electric motor drives, and can help make these less expensive, more environmentally friendly motors range-competitive with traditional PM motors.
This paper details the efficiency improvement when DMD is applied to a rare-earth-free synchronous reluctance motor (SynRM). We present recent experimental results to show the loss reduction by DMD in a prototype 8-kW three-phase SynRM, and compare them to simulation results. Tula’s models indicate that DMD control, when applied to a 150-kW SynRM driving a Chevrolet Bolt, would reduce energy use by approximately 2.5% over the WLTP driving cycle. A detailed discussion is provided on DMD’s theoretical background, motor design and control techniques to optimize system efficiency with acceptable noise, vibration, and harshness.
Citation: Islam, M., Singh, A., Arvanitis, A., Younkins, M. et al., "Efficiency Improvement of Electric Motor Drives Using Dynamic Motor Drive Technology," SAE Technical Paper 2022-01-0721, 2022, https://doi.org/10.4271/2022-01-0721. Download Citation
Author(s):
Md Zakirul Islam, Amnish Singh, Anastasios Arvanitis, Matthew Younkins, Siyu Leng, Paul Carvell, Adya Tripathi, Zhiqian Chen, Andrew Phillips
Affiliated:
Tula Technology Inc.
Pages: 12
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Electric motors
Electric vehicles
Energy consumption
Bolts
Simulation and modeling
Vibration
Harshness
Optimization
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »