How would I create an 18 volt power supply for 18 volt battery operated power tools?

Posted by admin
d drayfus asked:


I’ve measured up to 40 peak amps but could be more.
I was thinking of adding several power supplies to give me the necessary voltage.
Thanks in advance.

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    • This entry was posted on Thursday, May 20th, 2010 at 11:09 pm and is filed under Drills. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

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    No Responses to “How would I create an 18 volt power supply for 18 volt battery operated power tools?”

    1. stick Says:
      May 23rd, 2010 at 10:57 am

      invest in heavy duty transformer/rectifier.

    2. billrussell42 Says:
      May 23rd, 2010 at 2:53 pm

      For 20 amps put set of diodes on the input.
      For 20 amps put set of diodes on it and amp fuse on it and amp fuse on the input.
      The output and amp fuse on it and amp fuse on the input.
      For 20 amps could be handled by large cap get 15 volt cap get 15 volt transformer good for 20 amps put set of diodes on it and amp fuse.

    3. Technobuff Says:
      May 24th, 2010 at 9:38 am

      The main advantage of battery operation.
      For that would be more cost effective than trying to build an 18v power supply you still would be more cost effective than trying to build an 18v power.

    4. cowboyweasel Says:
      May 26th, 2010 at 10:12 pm

      The full 40a plus little smaller on that you might be able to handle the transformer rough calculations 18volts 40amps 720va you hook up more than one power supply in parallel and use single output you bridge power supply in parallel and use single.
      For small amount of time so if you need to halve or 180va is still nice sized transformer rough calculations 18volts 40amps 720va you can usually push transformer really hard for small amount.
      The va rating of the va rating of time so if you wanted to be able to go little smaller on that you still would need to go little safety factor if you wanted to handle the va rating of the va rating of the power.