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ケーススタディ:Medical knee surgery robot

Improving the ergonomics of hand-held tools

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お客様の課題

Reducing the scale of any intervention is a common aim in surgery, enabling the patient to recover more quickly. Miniature robotic tools can facilitate a reduction in the scope of the surgery. In addition, linking the position of the tool to a patient’s CT scans improves precision and reduces risk. Reducing the surgeon’s fatigue requires the minimization of the size of hand-held operat-ing tools. This manufacturer had the twin goals of reducing the weight of their hand-held robotic tool and improving its reliability. The key goals were:

Reduce size and weight of hand-held tool
Minimize interference with other equipment by reducing noise generated
Reliable solution required

Vicorソリューション

Power for the tool came from a 55V medically isolated bus and required conversion to 24V within the tool to drive the motors and control circuitry. To save space and weight a DCM DC-DC converter was selected that provided the 300W required in a footprint of just 8.8 cm² and a weight of only 24g. The converter featured a low noise switching topology and also provided isolation, helping to reduce EMI from the device.

主な利点

DCM offered high power density (1kW/in3) and low weight (24g)

Minimal electromagnetic interference (EMI)

DCM’s high level of integration significantly increased reliability

Vicor DCM DC-DC Converter reduces size of solution

A DCM DC-DC converter converted the 55V input to 24V 300W to drive the motor and control electronics. The high efficiency (91.3%) of the converter reduced waste heat in the tool, improving system reliability. To analyze this power chain go to the Vicor Whiteboard online tool.

Learn more about the modular approach power.

電力供給ネットワーク（PDN）