Design AC/DC power system for medical apps
The requirement for portability in such equipment means that size and weight are prime considerations in the selection of power supplies. You can always find a smaller power supply, or design one, by including a fan to provide forced air-cooling. You might save one-third to one half of the total volume of a typical unit in this way. The major disadvantage of this approach is fan noise, which disturbs and irritates patients. Other problems include a significant reduction in reliability—the fan will likely be the only moving part in the power supply, and you add a maintenance problem. Due to these issues, system designers are now looking to utilise convection-cooled power supplies to power their equipment.
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