Permanent Magnet (PM) Motor Drive Control System - Control Methods and Practical Design

Permanent magnets are a powerful solution for energy conservation and, consequently, environmental issues.

The ultra-powerful permanent magnet Nd-Fe-B (neodymium, iron, boron) is creating an innovative trend in motor drives. By utilizing its magnetic strength, the miniaturization and lightweight design of electric drive systems using permanent magnet motors have significantly advanced. Recently, applications have expanded to small-capacity uses that were previously unthinkable. As a result, manufacturers that have had no connection to motors, as well as those that did not require power electronics technologies like inverters, are increasingly facing a situation where new product development is hindered without motor drive control technology. Applications in hybrid vehicles, home appliances, machine tools, elevators, and trains are becoming active. Not only is there development of new functions and improvement of performance, but permanent magnet motors are also highly efficient as they do not require excitation current. This makes permanent magnets a promising solution for energy conservation and environmental issues.

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