Tech Torqs #5: What Is a Permanent Magnet (PM) Motor and Why Is It So Popular?
In this episode, Alva’s Design Engineer Matteo Leandro breaks down why Permanent Magnet motors are a top choice for applications like robotics, medical devices, and gimbals, and what makes them so effective.
August 19, 2025
In this episode of Tech Torqs, we explain the fundamentals of Permanent Magnet (PM) motors, how they work, what gives them an efficiency edge, and why they have become the go-to choice for compact, high-performance systems.
In PM motors, the rotor contains permanent magnets, typically made of rare earth alloys, that maintain their magnetization without requiring electrical current. This eliminates the need to energize the rotor, resulting in:
- Higher efficiency
- Lower weight
- Greater reliability
These benefits make PM motors especially valuable in industries where precision, low inertia, and energy efficiency are critical.
If you have a question about motors or motion systems, share it in the comments on our LinkedIn post or send it to us directly - we might feature it in the next Tech Torqs episode.
All rights reserved ©2025