Since the gear engagement is a commoncoupling form between rotors, the transfer matrix of skew gear engagement in global coordinate system is deduced based on the concept of coupling element.
D-STATCOM has been paid more and more attention since it can stabilize the voltage of the commoncoupling point and compensate the reactive power. But there are still many problems to be resolved.
Designers use various methods of thermally coupling the transistor and the tempco, ranging from glueing the two together, to mounting them both on a common heat sink.