Permanent Magnet Synchronous Motor

In our fast-paced world, permanent magnet synchronous motors – commonly used in industrial automation for traction, robotics or aerospace – require greater power and heightened intelligence. Cutting-edge semiconductor solutions from Infineon promise and deliver highest-possible quality and the most innovative technologies. Turn to our software tools to reduce the complexity and cost of integrating specific feature sets into your systems. Within Infineon’s wide portfolio, you'll find the right products, application kits and support to optimally control permanent magnet synchronous motors. See additional motor control applications here in Battery Powered Applications, Home & Building and Industrial Automation.

The permanent magnet synchronous motor is cross between an induction motor and brushless DC motor. Like a brushless DC motor, it has a permanent magnet rotor and windings on the stator. However, the stator structure with windings constructed to produce a sinusoidal flux density in the airgap of the machine resembles that of an induction motor. Permanent magnet synchronous motors' power density is higher than induction motors with the same ratings since there is no stator power dedicated to magnetic field production. Today, these motors are designed to be more powerful while also having a lower mass and lower moment of inertia.

Key Characteristics

  • Close relative of the brushless DC motor
  • Permanent magnet rotor and windings on the stator
  • Sinusoidal back electromagnetic field (EMF) waveforms of the windings 
  • Controlled with sinusoid waveforms: matches the back EMF waveform of each winding

Example Application for Permanent Magnet Synchronous Motor (discrete)