REDUCED RARE EARTH PERMANENT MAGNET SYNCHRONOUS MOTOR
Novel design for permanent magnet synchronous motor with 20% reduction in the rare-earth magnet volume compared to conventional synchronous motors.
Challenges of permanent magnet synchronous motors (PMSM) market
- Permanent magnet synchronous motors (PMSMs) with rare-earth magnets are widely utilized.
- PMSMs provide higher efficiency and torque density compared to conventional DC, induction, and wound-rotor synchronous machines.
- But higher costs due to the added magnet.
- Concern about the future availability of rare-earth magnets at economical prices.
The new design of reduced rare-earth permanent magnet synchronous motor
- Novel rotor configuration for interior PMSMs.
- Improved utilization of thereluctance torque compared to conventional interior magnet designs.
- 20% reduction in the rare-earth magnet volume, for the same machine output torque.
- Prototype available.
- A patent pending technology developed by prof. Pragasen Pillay and Maged Ibrahim at Concordia University.
The new PMSM design presents multiple advantages compared to classic synchronous motors
- Produce lower costs PMSMs.
- Provide smooth torque with less than 6% ripple.
- Fast response in variable speed applications due to reduced inertia.
Interesting market applications in reduced rare-earth PMSM
PMSM new design may be used in many applications:
- Industrial motors operating at variable speeds.
- Motors for home appliances.
- Automotive applications for electric and hybrid electric vehicles.
- Technology available for licensing.
- Potential development of new and improved PMSMs.
Pragasen Pillay & Maged Ibrahim
Professor and NSERC/Hydro-Québec Senior Industrial Research Chair
Prof. Pillay is a professor in Electrical and Computer Engineering Department. His research interests are in Modeling, Analysis, Design and Control of Electrical Machines, Electric Motor Drive Systems, Traction Motors for Electric and Hybrid Electric Vehicles, Renewable Energy including Wind, Biomass and Solar Energy, Energy Storage, Energy Efficiency and Conservation, Sustainability issues in Power and Energy Engineering.