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transformers converts voltages to a higher or lower value but in that process energy or current is lost when converted to a higher voltage, if that is the case is current generated when the voltage is stepped down?
also if the voltage in a DC current were to increase would that also mean more current is being drawn from the battery(ohms law) and therefore kills the battery faster?also if that were the case couldn't the battery potentially heat up?
When the current in the primary is off (AC mains zero crossing) the magnetic field in the core collapses and this induces a current to flow in the secondary winding.
is current generated when the voltage is stepped down?also if the voltage in a DC current were to increase would that also mean more current is being drawn from the battery(ohms law) and therefore kills the battery faster?also if that were the case couldn't the battery potentially heat up?
It's mentioned in the thread above that opening/closing a voltage source is one way to turn DC into AC. Specifically, closed == full current; open == no current; thus, current alternates. (And because of rise/fall times, the "==" only becomes true over time.)
For the current to alternate in the secondary
QuoteFor the current to alternate in the secondaryI see -- "alternate" as in "changes polarity" instead of "changes value over time." (I learned electronics in an obscure Nordic language thirty years ago, and am not actually a native English speaker...)Transformers can only transfer energy when the current through them changes value over time. Actual alternating polarity is not necessary.
To produce alternating polarity in the secondary of a transformer, alternating polarity in the primary is required.
so let's say i was planning to buy a DC to DC conveter how could i reduce the temperature of the battery(power supply)