Question

What is the applied voltage to a 3-phase battery charger with respect to the input 3-phase voltage?

A. The applied voltage to a 3-phase battery charger is equal to the input 3-phase voltage.
B. The applied voltage to a 3-phase battery charger is lower than the input 3-phase voltage.
C. The applied voltage to a 3-phase battery charger is higher than the input 3-phase voltage.
D. The applied voltage to a 3-phase battery charger can vary depending on the charging mode.

Answer 1

The applied voltage to a 3-phase battery charger can vary depending on the charging mode.

Step-by-step explanation:

The applied voltage to a 3-phase battery charger can vary depending on the charging mode. Some batteries can be recharged by passing a current through them in the opposite direction of the current they supply to an appliance. In this case, the voltage output of the battery charger must be greater than the electromotive force (emf) of the battery to reverse the current through it. This causes the terminal voltage of the battery to be greater than the emf. Therefore, option D is the correct answer.