Large Permanent Magnet Motors and VFD's
Many industrial projects fail to capture the full value of large permanent magnet motors, not because of the technology itself, but because early engineering decisions are misunderstood or overlooked. Having supported large PM motor applications across critical industries, Valmir Andrade, Wolong Technology Leader, frequently sees questions around when a VFD is truly required — and when this costly hardware can be avoided. With the right application evaluation, self-starting permanent magnet motors can be applied with a direct and positive impact on reliability, risk exposure, and total cost of ownership. In the images below, he shares a design and application perspective used in projects by Wolong Electric America, showing how self-starting and VFD-driven PMSMs enable two distinct operating strategies, each creating value when applied correctly. If you are accountable for uptime, CAPEX efficiency, or long-term operational risk, this distinction matters.