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dc bus in power electronics

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mess123

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I am confused by the term 'DC bus' used very often in Power electronics where multiple DC DC converter are connected to fed a common load? I had studied about the synchronization in AC but how actually the multiple DC/DC converters are synchronized?
From the software simulation, I came to know that if the voltage of two sources are perfectly same, then current will be shared in each sources through the common bus? But in practice, such perfectly same voltage doesn't happen in each of the DC DC converter as they will have ripples in the output voltage.
Can anybody explain to me about this.
 

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