variable transformer การใช้

• The only obvious approach would be to either use a tap changer or convert the voltage later with some kind of variable transformer or power electronics.
• They can be restored before use by gradually applying the operating voltage, often performed on antique vacuum tube equipment over a period of thirty minutes by using a variable transformer to supply AC power.
• The " swinging link " is a form of variable transformer, that moves the input coil in and out of the space between turns in the main coil to change their mutual inductance.