VOICE COIL MOTORS

Voice Coil Actuators are the technical implementation of the Lorentz-Force-Principle: the force of a current carrying conductor in a magnetic field is proportional to the field strength and the current. An alternation in the current direction also alternates the direction of the force so that voice coil actuators are bidirectional actuators with similar behaviour in both directions. Both rotary and linear versions are available. Electrically voice coil motors are single phase motors and can be operated like conventional DC-motors. One big advantage e.g. over proportional solenoids is the extremely small hysteresis which make voice coil actuators ideally suited for applications requiring well controllable movement in both directions. Also requirements regarding audible noise, small overshoot or very good controllability on force can be fulfilled easily with voice coils. 

General characteristics of voice coil motors:

  • very small hysteresis
  • no cogging
  • high dynamic response due to small moving mass
  • high overload capacity

Voice coil motors very often are supplied as pure actuators, where the feedback for the control is derived from other variables in the application, e.g. like pressure or gas mixture in medical or valve applications.  

 

Voice Coil Aktuatoren (Tauchspulen) als Komponenten (G+)

Some customers would like to do all the integration of components for their applications. For this purpose we supply two families of voice coil actuators, with no integrated sensors and only limited or no guiding: the VM series (standard with linear sleeve bearing; custom version without bearing possible) and the CVC series with no bearing.

Our Voice Coil Actuator models:

  • VM: voice coil actuators in pot version with integrated sleeve bearing as standard; 1 to 45N continuous, 16 to 80mm diameter, stroke up to about 30mm, custom versions welcome!
  • CVC: voice coil actuators in pot version without guiding, up to 612.5N continuous, 20 to 180mm diameter

For integrated versions with bearing and position sensor we recommend the voice coil motors of our partner SMAC!