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regulator/ charger design

Discussion in 'General Electronics Discussion' started by greigy, Mar 28, 2013.

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  1. greigy


    Mar 28, 2013
    I am building a micro hydro plant for my home wich I expect to be able to generate around 300-400W of power from a streem up the hill. I have a permanant magnet 3 phase 230V motor from an old fisher and paykel smart drive washing machine which I have reconfigured the windings to provide an output voltage of between 60 and 100v raw DC after rectification depending mostly on load. I am wanting to make as simply and as reliable as possible a regulator circuit to allow charging of batteries for my inverter.

    Batteries are simple lead acid type at this stage may go deep cycle later on but given that the turbine will run 24/7 i doubt they need to be

    efficiancy is not a huge concern since the turbine will be running continuiously and I am away most of the day. I only need it to run my fridge and lighting at night on a daily basis.

    I am looking for something simple, cheap and reliable using common parts. I was hoping to be able to use some form of 3 terminal regulator capable of handeling the higher voltage with boost transistor(s). one issue I can see in this approach is the power dissipated by the transistor(s) but I should be able to source reasnoble heatsinking.

    also id like to be able to have a dump load turn on automaticly when the batteries reach a charge level, probably just a 120v water heater element. this would probably be some form of voltage controlled switch on a relay im thinking at this stage.
  2. BobK


    Jan 5, 2010
    I would certainly use switch a switch mode regulator. Unless you are talking about saving a few dollars, they are far more efficient than linear regulators, and do not produce excessive heat.

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