Permanent-Magnet Stepper Motors: Disc Motor Benefits

Sinotech    January 21, 2014

Disc motors are permanent-magnet stepper motors that act in a similar fashion as hybrid motors. Unlike hybrid and traditional permanent magnet motors, disk motors have thin rotors. Stepper motor manufacturers have created disc motors for over two decades, but improvements to magnet-related technologies have expanded their applications. Advantages of Disc Motors Maximum accuracy: At high stepping rates, the distortion of the output torque sinusoid is lower. The integral-velocity damper also allows for out-of-phase feedback, which reduces errors, ringing and overshoot. Low inertia: The disc armature doesn’t contain iron and has a thin design, which provides a high torque-to-inertia ratio. Smooth…

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Micro Stepper Motors for Control Systems

Sinotech    December 2, 2013

A stepper motor is a type of brushless DC motor that has an equal number of steps dividing a full rotation. Micro stepper motors take a standard step, say 7 degrees, and divide it up to provide smaller steps of, for example, 3.5 degrees.   As the micro-steps get smaller, the motor’s operations get smoother, which reduces the resonance within the motor and parts connected to it. The micro stepper motor is suited for control systems for the following reasons: Drift-free motor stiffness while stopped. High levels of torque despite the small size. Stepper motors are simple to maintain because they…

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