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Design AC/DC power system for medical apps

Posted: 14 Jul 2009     Print Version  Bookmark and Share

Keywords:Medical electronic  power supplies  air-cooling 

Medical electronic equipment is no longer just used in hospitals, which means that trained experts do not always operate it, or used in tightly controlled environments. Such equipment is now widely used in doctors' surgeries, in ambulances and even in the home.

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.

View the PDF document for more information.

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