Figure 2. A simple sine wave with a period of 360° and an amplitude of 1. In single phase power the x-intercepts are 180° from each other. A full period is 360°. A single phase motor has a crest approximately every 16.5 milliseconds giving the motors a tendency to vibrate more, which may contribute to a shortened bearing life.
Figure 3. Three phase power has three identical sine waves overlapping at an offset of 2π/3 radians or 120°. When one phase reaches an x-intercept or node the next phase is only 30° and approximately 5.6 milliseconds from reaching its crest.
Computer Numerical Control Machine (CNC) at Nickerson
Model 342A Single Stage End Suction
Horizontal Lathe
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
SF Series®
Impeller wear ring
Frame-mount Centrifugal Pumps
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Computer Numerical Control Machine (CNC) at Nickerson
Horizontal Lathe
Schlumberger Pump Assembly
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Close-Coupled Vertical Turbine
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Custom fabrication to a large part
Super T Series® Engine Driven
Figure 1. The general arrangement of a three phase waveform.
