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Efficiency Improvement of Electric Motor Drives Using Dynamic Motor Drive Technology
Technical Paper
2022-01-0721
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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.
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Authors
- Md Zakirul Islam - Tula Technology Inc.
- Amnish Singh - Tula Technology Inc.
- Anastasios Arvanitis - Tula Technology Inc.
- Matthew Younkins - Tula Technology Inc.
- Siyu Leng - Tula Technology Inc.
- Paul Carvell - Tula Technology Inc.
- Adya Tripathi - Tula Technology Inc.
- Zhiqian Chen - Tula Technology Inc.
- Andrew Phillips - Tula Technology Inc.
Topic
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.Also In
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