Power Electronics / Power Management

Convection-cooled medical/industrial power supply

24 November 2021 Power Electronics / Power Management

With its AEA1000F series, Cosel has introduced a new range of 1000 W free-air convection cooling power supplies. With demanding applications in mind, the AEA1000F is able to deliver 330% peak power for a period of up to 3000 milliseconds.

Designed for applications requiring a high level of safety, the power supply is certified according to the EN62477-1 (OVC III) standard for industrial applications and is approved in accordance with ANSI/AAMI ES60601-1 and EN60601-1 3rd Edition for medical applications.

The AEA1000F is suitable for Body Floating (BF) applications and complies with 2MOPP (IN/OUT) and 1MOPP (OUT/FG) safety requirements. Its layout is optimised for free-air convection, making it ideal for use in equipment being operated in low-noise environments.

With the ever-increasing levels of automation in industrial and medical applications, power supplies must be able to deliver extra power during peak operation times as required by dynamic loads such as motor start-up. To satisfy and sustain such conditions, the power supply must be designed with a high dynamic control level and a power stage able to sustain repetitive peak loads. The AEA1000F is able to deliver 330% of its free-air, convection cooled, nominal power for a period of up to 3 seconds, which is noteworthy and responds to the latest market requirements from industrial and medical equipment.

Industrial applications are now requiring efficient power supplies that are able to work in various environments with a high level of safety. The AEA1000F is certified to the EN62477-1 Over Voltage Category Three (OVC III), meaning that end-equipment powered by it can be directly connected to the main distribution panel without adding an extra level of isolation. This simplifies the systems designer’s task, reduces costs and guarantees the highest level of efficiency.

For medical applications, the unit’s input-to-output isolation complies with 2MOPP, its input to ground with 1MOPP and output to ground with 1MOPP – making the product suitable for Body Floating (BF) applications. The AEA1000F has an input to output isolation of 4000 V a.c., input to ground (FG) of 2000 V a.c. and output to ground (FG) of 1500 V a.c.

Designed for international applications, the versatile AEA1000F has an input voltage of 85 to 264 V a.c. Three output voltages are available: 24 V, 36 V and 48 V, with respective current ratings of 42 A, 28 A and 21 A. Output voltage can be adjusted using a built-in potentiometer.

For low harmonic current distortion, the AEA1000F uses an active power factor corrector (PFC) and the switching stage uses an LLC resonant topology deploying the latest generation of power semiconductors, resulting in a typical efficiency of up to 95%.

For additional power, up to six AEA1000F units can be connected in parallel. When in parallel, by adjusting the output voltage on the ‘Master’ unit, ‘Slaves’ automatically adjust their output voltage to be of equal value. Optimised for convection cooling, the AEA1000F can be operated within an ambient temperature range of -20°C to +70°C. Depending on the assembly method and ventilation used in the final equipment, a derating may apply as specified in the technical documentation.


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