House Targaryen is a former Great House of Westeros and was the ruling royal House of the Seven Kingdoms for three centuries, before it was deposed during Robert's Rebellion and House Baratheon replaced it as the new royal House. The few surviving Targaryens fled into exile.
PCD Explained. PCD stands for Pitch Circle Diameter. Also Known as Bolt Circle Diameter (BCD). The Bolt Circle Diameter (BCD) (or Pitch Circle Diameter - PCD) is the diameter of the circle that passes by the center of the bolts. This is very easily measured on wheels with even number of bolts by measuring the distance between the center of two opposite bolts in mm.
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.he VFD controller is a solid-state power electronics conversion system consisting of three distinct sub-systems: a rectifier bridge converter, a direct current (DC) link, and an inverter. Voltage-source inverter (VSI) drives (see 'Generic topologies' sub-section below) are by far the most common type of drives.