12/05/2023
By Danielle Fretwell

The Francis College of Engineering, Department of Electrical and Computer Engineering, invites you to attend a doctoral dissertation proposal defense by Ramin Safarpour on “Performance Enhancement of Magnetic Gears and Magnetically Geared Machine: Focus on Trans-Rotary Magnetic Gear.”

Candidate Name: Ramin Safarpour
Defense Date: Tuesday, Dec. 19, 2023
Time: 2 to 4 p.m. EST
Location: This will be a virtual defense via Zoom. Those interested in attending should contact Ph.D. advisor at least 24 hours prior to the defense to request access to the meeting.

Committee:

  • Chair: Advisor Siavash Pakdelian, Ph.D., Assistant Professor, Electrical and Computer Engineering, University of Massachusetts Lowell
  • Tingshu Hu, Ph.D., Professor, Electrical and Computer Engineering, University of Massachusetts Lowell
  • Mufeed Mah'd, Ph.D., Associate Professor, Electrical and Computer Engineering, University of Massachusetts Lowell
  • Christopher J. Hansen, Ph.D., Professor, Mechanical and Industrial Engineering, University of Massachusetts Lowell

Abstract:

Unlike traditional mechanical gears, which rely on physical contact between gear teeth, magnetic gears employ magnetic fields for motion conversion. A coaxial magnetic gear converts a low-speed, high-torque rotational motion into a high-speed, low-torque rotation and vice versa. On the other hand, a trans-rotary magnetic gear (TROMAG) converts linear motion to rotation and vice versa. This work aims at enhancing the performance of coaxial magnetic gears and TROMAGs. All magnetic gears utilize permanent magnets (PMs) to generate magnetic fields. Given that rare earth PMs are costly and have an unstable supply chain, it is crucial to optimize the utilization of PM material. Here, two approaches were adopted for performance enhancement: (1) Blind Approach (topology optimization) and (2) Intuitive Approach. Using these approaches, novel topologies and novel types of TROMAG were discovered. The results of this work include but are not limited to: (1) enhancing the force density of reluctance radially magnetized TROMAG by 40%, (2) enhancing the PM utilization of radially magnetized PM TROMAG by 47%, (3) introducing a new type of induction TROMAG, and (4) enhancing the torque per mass of the radially magnetized coaxial gear by 40%.

All interested students and faculty members are invited to attend the defense via remote online access.