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Motors and Mechanical Power Transmission

High-force Direct Drive Voice Coil Actuator

30 January 2018

Source: H2W TechnologiesSource: H2W Technologies

H2W Technologies says it has developed the world’s highest force commercially available non-commutated DC linear actuator, or direct drive voice coil actuator. Model NCC08-75-3000-3X is capable of generating a continuous force of 300 pounds [1,330 N] and a peak force of 900 pounds [4,000 N] at a duty cycle of 10 percent (i.e., 1 second on, and 9 seconds off).

A moving mass of just under 8 lbs [3.6 kg] allows for a maximum theoretical continuous acceleration of nearly 38 Gs. The NCC08-75-3000-3X also features a stroke of 0.8 in [20 mm] and a motor constant of 17.6 lbs/sqrt(watt) [323 N/sqrt(watt)]. The voice coil motor requires 4 amps of continuous current and 12 amps of peak current in order to generate the specified forces. The massive actuator has a diameter of 7.47 in [190 mm] and a retracted length of 8.15 in [207 mm].

Hysteresis-free movement is ensured by the moving coil design, as the bobbin is constructed of aluminum while the non-commutated coil allows for ripple-free motion and no cogging. The voice coil actuator is designed with a thru hole in the magnet and coil assemblies, allowing for the integration of a shaft and bearing system through the center of the motor. Alternatively, the actuator can be used in many applications where a thru hole would be necessary such as focusing applications or fiber optic routing.

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