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Voice Coil Motors
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From GEEPLUS Inc.
Voice coil motors offer excellent control characteristics where linear actuation is required over short distances with electronic control systems. Comparison of the force characteristics vs displacement, and vs current, for voice coil devices and solenoid actuators shows the difference between these devices. The flat force characteristic exhibited by the voice coil motor lends this to applications requiring precise control of force or position such as control valves, or lens and mirror positioning systems, whereas the sharp increase in developed force as the pole faces approach one another in a solenoid device makes these difficult to control. The voice coil motor can develop force in either direction by reversing polarity of the excitation. In a solenoid, a spring is typically required to produce force in the return direction, this spring force subtracts from the magnetic force developed so reducing force and speed in the energised direction. Combined with low inductance this makes possible cycle times <1ms in certain cases, typically an order of magnitude faster than solenoid devices Products & Services
Voice coil actuators and motors generate force when subjected to an electrical current or magnetic field. The coil within the motor is the only moving component, allowing for high speed motion and accurate positioning.
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Learn more about Voice Coil Actuators and Motors
Stepper motors use a magnetic field to move a rotor in small angular steps or fractions of steps. They provide precise positioning and ease of use, especially in low acceleration or static load applications.
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Learn more about Stepper Motors
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