BEI Kimco’s Actuator with Magnetic Spring Technology Solves Challenging Application Requirements for High Reliability and Superior Service Life
5th August 2010
BEI Kimco Magnetics, recently met the challenging valve control actuator requirements for a medical ventilator system for critical care patients. Two Kimco Voice Coil Actuators support different functions within the ventilator. One actuator controls the diaphragm valves that regulate the air pressure within the patient’s lungs during the inhalation and exhalation cycles. A second actuator operates a safety valve that diverts the air flow around the ventilator in the event of a system malfunction or power failure. Both actuators incorporate a magnetic spring that establishes the preferred or home position. This feature was an important design element to support maximum battery life and the fail-safe valve mechanism.
Key to the ventilator’s design specification was to develop a highly reliable Voice Coil Actuator that would provide exceptional repeatability and reduced power consumption when compared to competing technologies. To meet these requirements, BEI Kimco developed the VCA LA16 series with a patented Magnetic Spring.
“The magnetic spring eliminates the need for a mechanical return spring or alternative option which may fatigue or fail,”
explains Miguel Hermosillo, BEI Kimco Applications Engineer. “Over time, these mechanical type springs exhibit wear and tear, resulting in a reduced spring constant that causes undesirable performance deviations, especially critical for medical equipment operation”
BEI Kimco’s Actuator with Magnetic Spring Technology Solves Challenging Application Requirements for
High Reliability and Superior Service Life
The actuator’s performance characteristics included a 6 mm stroke, a peak force of 60 N, and a continuous force of 17 N. Small size featured an outside diameter of just 40.6 mm and a length of 46 mm. BEI Kimco’s VCA with magnetic spring can be customized to individual applications with customer-specified actuator size, stroke, stall force, peak force, and other key performance requirements.
“The magnetic spring eliminates the need for a mechanical return spring or alternative option which may fatigue or fail,”
explains Miguel Hermosillo, BEI Kimco Applications Engineer. “Over time, these mechanical type springs exhibit wear and tear, resulting in a reduced spring constant that causes undesirable performance deviations, especially critical for medical equipment operation”
BEI Kimco’s Actuator with Magnetic Spring Technology Solves Challenging Application Requirements for
High Reliability and Superior Service Life
The actuator’s performance characteristics included a 6 mm stroke, a peak force of 60 N, and a continuous force of 17 N. Small size featured an outside diameter of just 40.6 mm and a length of 46 mm. BEI Kimco’s VCA with magnetic spring can be customized to individual applications with customer-specified actuator size, stroke, stall force, peak force, and other key performance requirements.
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