hi there,
i'm planning to use a voltage booster for my fuel cell stack which theoretically will provide 48VDC , in which i'm going to power a 350W 48V Dc motor.

i'm not sure which type of voltage booster i should use...
the closes i found is (max15004) http://www.maxim-ic.com/datasheet/index.mvp/id/5319 .

Furthermore a lot of booster only give our less than 1A of current, i doubt that will be able to run my motor.

 

Go to National.com (National Semiconductor) and use their Simple Switcher calculator to design what you need, including the right amount of current.

 

i search through but yet haven't found any suitable IC thou. seems like they dont really support 40+ voltage output

 

Take a peek at this.

 

Have you asked yourself why you do not not get the 48V. If you get 34 volt only. Something has to be very wrong. Let us say you will get an efficiency equal to 75% from your DC to DC converter. So your fuel cell has to deliver 467 Watt. At 34 volt this is about 14 ampere. Are you sure your fuel cells can deliver that current.

 

the reason is that by having 48v output, the stack has to consist of at least 68 cell ( considering each cell gives around 0.7v ) , thats a huge stack which in terms cost a lot.

i'm thinking of using a 24v output , then applying a voltage booster, but then it would be impractical assume the stack would supply a 16~18A.

well if in the end i can find a practical device to support such voltage boosting ability, i might just have to use a 48v fuel cell stack.