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how to implement 240AC to 240DC converter

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nismo87

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240AC to 240DC converter

Does anyone know how to implement this device?
 

shamikrudra

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Re: 240AC to 240DC converter

simply make bridge rectifier using four 1N4007 diode to convert 240V AC to 240V DC.
 

rajudp

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240AC to 240DC converter

if you want isolation from mains use a transformer,
 

ark5230

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If you use filter capacitors for smoothing of DC, it will increase voltage at the output by a factro of 1.41 thus some voltage divider or alternate can be resorted if the 240 AC to 240DC is critical.
Raoof
 

karesz

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Hi,
These means, that you must have a DC/DC Converter with Dc Input of ca. 300-350V:).
Check pls **broken link removed** has a good designer Sw (downloadable) & rich ApplNotes...
"PI Expert® Suite v7.1 simplifies the design of off-line power supplies and DC-DC converters based on PI products."
ST is another good source of ApplNotes.
K.
 
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Tahmid

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Hi,

When you rectify the AC voltage to DC and add filter capacitors, you have a DC voltage that is approximately 1.414x the AC input. So, you have a 1.414 * 240 = 339VDC supply.

Use a DC-DC converter now to convert this to 240VDC. You can use TOPSwitch from Power Integrations, VIPERswitch from ST Microelectronics or a discrete circuit with UC384x and MOSFET.

An alternative is to drop the 240VAC to 170VAC using a transformer and then rectifying this to DC and filtering it. So, you will have a 170 * 1.414 = 240VDC supply.

The latter method would be much easier, but maybe more expensive / bulky, depending on your power rating.

The first method would be a little trickier, but not very difficult nonetheless, and will be lightweight and cheaper, but again this depends on your power rating.

Hope this helps.
Tahmid.
 

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