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Voice Coil Motors

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Voice Coil Motors (VCM)

Voice Coil Motor (VCM), also called Voice Coil Actuators (VCA), is an electric motor consists 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.

Some examples of applications of VCM

  • Shaker/Vibrator
    Voice coil actuators (VCAs) provide advanced solutions for a broad range of industrial shaking applications where the actuator is used as the vibration source.
  • Lens focusing
    Voice coil motor (VCM) actuator is used for cell phone camera applications in which the lens was precisely positioned by a closed-loop feedback signal generated by a Hall element.
  • Servo valves
    Voice coil motor (VCM) actuator is used for servo valves.
  • Positioning Stage
    Voice coil motor (VCM) actuator is widely used for positioning stage.
  • Speaker
    Voice coil motor (VCM) actuator is widely used for speaker.
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Advantages of VCM

Linear DC Motors, Voice Coil Motors (VCM) or Voice Coil Actuators (VCA) are the simplest type of electric motors. These motors consist of two separate parts; the magnetic housing and the coil. Applying a voltage across the terminals of the motor causes the motor to move to one direction. Reversing the polarity of the applied voltage will move the motor to the opposite direction. The generated force is proportional to the current that flows through the motor coil. This force is almost constant in the specified stroke range of the motor. Voice coil motors are brushless and do not utilize commutation. Their structural stability can support high positioning resolutions presented by external position sensors and motion controllers. These are many advantages of VCM.
  • No commutation required
  • Low to no hysteresis
  • Zero cogging
  • Fewer mechanical components compared to “screw-type” actuators
  • Linear control characteristics
  • High power to mass ratio
  • High power to volume ratio
  • Infinite position (only limited by the encoder device)
  • High acceleration

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Stanford Magnets
Average rating:  
 3 reviews
by Felix E. Fernandez on Stanford Magnets

Did exactly what I wanted them to do. Excellent for the price

by Wachsman Eric on Stanford Magnets

Fits and performed perfectly.

by Martin E. Kordesch on Stanford Magnets

Quality is good. Exactly what I needed for the STEM activity I’m putting on.

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