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permanent magnet motor

FAQ: What is sinusoidal back EMF with sinusoidal current?

April 23, 2016 By Danielle Collins Leave a Comment

Both brushless DC (BLDC) and brushless AC (BLAC) motors are permanent magnet, synchronous devices. They both produce torque and speed through the interaction of a rotating magnetic field in the stator and permanent magnets on the rotor. But while they have many similarities, differences in their stator construction produce different back EMF waveforms and result […]

Filed Under: AC Motors, Brushless Motors, FAQs + basics, Motors, Servo Motors Tagged With: back EMF, BLAC, brushless AC, commutation, permanent magnet motor, PMSM, sinusoidal current

What’s the difference between BLDC and synchronous AC motors?

December 17, 2015 By Danielle Collins Leave a Comment

BLDC and synchronous AC motors

The short answer is: brushless DC (BLDC) and synchronous AC motors are similar in construction and operation. Some manufacturers and experts even group them together as similar technologies, in the category of  “permanent magnet synchronous motors.” Their key difference, however, lies in the stator coil windings and resulting back-EMF waveform of each motor. This gives them distinct performance […]

Filed Under: DC Motors, FAQs + basics, Motors, Servo Motors, Stepper Motors Tagged With: bldc motor, brushless motor, permanent magnet motor, synchronous motor

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