Pct designs and packages complete AC variable frequency drive systems for the rig123.net' target='_blank'>drilling industry. All AC drives convert AC to DC and then through various switching techniques invert the DC into variable voltage, variable frequency output. The AC control system utilizes advanced digital vector technology which greatly improves the speed adjusting specification of AC motors and system power factor.

The worldwide success of the AC control modules was accomplished by the reduction of all vital electronics for the AC functions of the system to a single circuit board. All modules of each type are interchangeable and identical for replacement in minutes. The modules are hard-wired to eliminate loose connections caused by vibration. Each module is subject to rigorous testing to eliminate any inferior components. Modules are calibrated at the factory and require no adjustments in the field. Service and troubleshooting of the system is minimized.