High Accuracy Digital Motor Current Control in an Extremely Small Package

The A3904 is the first device in a series of voice coil motor drivers with I²C serial interface designed for camera auto focus and zoom applications. The operating voltage range is 2.4 V to 5.5 V and the maximum output current is 127 mA. (read more)

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. (read more)

Gee Plus Inc. of Elgin, South Carolina, furnishes 4 new larger sized voice coil motors that possess force values ranging from 36 newtons (8.1 pounds) from model VM4632 (1.85 inches OD by 1.26 inches long) up to 150 newtons (31.5 pounds) from model VM8054 (3.15 inches OD by 2.13 inches long). The VM4632 voice coil motor model provides a 0.4 inch stroke with a 210 watt input at 10% duty cycle. Con... (read more)

Linear motion voice coil motors have been developed by Gee Plus Inc., located in Elgin, South Carolina. Seven models ranging in size from the smallest (VM1614) 0.63" diameter by 0.55" long to the largest (VM8054) 3.15" diameter by 2.13" long provide precision linear actuation over short distances or strokes. The linear motion force profile is constant and linear over a wide range ... (read more)

Gee Plus Inc. of Elgin, South Carolina, announces the new VM2436 voice coil actuator that provides precision bidirectional linearity over a maximum linear stroke of 0.59 inches. (read more)

H2W Technologies Non commutated DC Linear (NC) Actuators are ideal for short stroke (typically less than 2 inches) closed loop servo applications. Their compact size allows them to fit into small spaces. They have very low electrical and mechanical time constants. The low moving mass allows for high accelerations of light payloads. (read more)

This Linear Positioning Stage is ideal for sort stroke, (typically less than 2 inches) precision positioning and scanning applications. The voice coil linear actuator is non-commutated thus eliminating the force and velocity ripple characteristics typical of commutated motors. (read more)

High resolution, compact, voice coil stages with no force or velocity ripple for very smooth motion, are ideal for precise motion control applications such as scanning, lens grinding, and laser and mirror positioning. These motion control stages offer high force output per weight, and footprint. (read more)

TWO ACTUATOR MODELS IN THE LA15-16 LINE

BEI Kimco Magnetics model LA15-16-020A is a two-wire non-commutated direct drive linear voice coil servo actuator featuring cog-free, hysteresis free motion with high acceleration capability. (read more)

BEI Kimco introduces its housed voice coil actuator (VCA) with an integrated position sensor. A smart voice coil actuator integrates a position feedback sensor for servo positioning or velocity control. It can be mounted into hand-held wands and used in reciprocal medical applications like skin-abrasion and tissue stimulation. (read more)