back voltage การใช้

• The principle of the DFIG is that rotor windings are connected to the grid via slip rings and back-to-back voltage source converter that controls both the rotor and the grid currents.
• Other position feedback methods measure the back EMF in the undriven coils to infer the rotor position, or detect the Kick-Back voltage transient ( spike ) that is generated whenever the power to a coil is instantaneously switched off.
• Bray wrote : " That was the one aspect that we missed, but even had we understood the idea of minority carrier injection . . . we would have said,'Oh, this explains our effects .'We might not necessarily have gone ahead and said,'Let's start making transistors,'open up a factory and sell them . . . At that time the important device was the high back voltage rectifier ".