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Power Supply Switching & charging battery

Discussion in 'Power Electronics' started by EEngineer93, Feb 28, 2021.

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  1. EEngineer93

    EEngineer93

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    Feb 28, 2021
    [​IMG]

    So my aim is create/find a circuit that will switch between 2 power supplies as follows:

    1- When generator is [OFF] - The battery will power the load

    2- When generator is [ON] - The generator will power the load and supply power to the charger in order to charge the battery.

    Note: Switching between both supplies must be done simultaneously to ensure no interruption of power.

    Thank you!
     

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  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,153
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    Nov 17, 2011
    Seamless switching can be done with two diodes:
    upload_2021-2-28_12-37-54.png
    Note that the generator needs to supply a slightly higher voltage than the battery. Otherwise the battery would power the load all the time.
     
  3. EEngineer93

    EEngineer93

    5
    0
    Feb 28, 2021

    Good idea, now how would I go about supplying power to the charger this way? I believe supplying the charger before the diode on the gen side would work, correct?
     
    Last edited: Feb 28, 2021
  4. Harald Kapp

    Harald Kapp Moderator Moderator

    11,153
    2,547
    Nov 17, 2011
    Like this:
    upload_2021-2-28_18-1-53.png
     
    EEngineer93 likes this.
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