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Voice Coil Motors

Stanford Magnets Official


Voice Coil Motor (VCM), also called Voice Coil Actuators (VCA), is an electric motor consisting of a magnet and yoke in conjunction with a coil. The magnet’s position, the type of magnet, the surrounding structure, etc., can influence the efficiency of the unit.

Voice Coil Motors (VCMs), also known as Voice Coil Actuators (VCAs) or Linear DC Motors, embody the epitome of simplicity in electric motor design. Comprising just two main components—the magnetic housing and the coil—they operate on a straightforward principle. The application of voltage across the motor's terminals induces movement in a specific direction, with the polarity reversal facilitating motion in the opposite direction. The force generated is directly proportional to the current passing through the coil, maintaining near-constant levels across the motor's operational stroke range.

VCMs stand out for their brushless operation and lack of commutation, enhancing their structural integrity and enabling high positioning accuracy, especially when paired with sophisticated external position sensors and motion control systems.

Voice Coil Motor (VCM) Advantages

Voice Coil Motor (VCM) Applications

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