TECHNOLOGY PRIMER


SRC WRIM Drive Systems

The Secondary Resistive Controller is a most reliable and robust controller for various large Wound Rotor Induction Motor industrial applications…

(Click here to see SRC/WRIM PDF.)


SRC for Pumps

Secondary Resistive Controllers for Pumping Applications couples Synergy's long-time proven SRC technology with pump applications, resulting in the new Pump Drive SRC with variable speed capability…

(Click here to see SRC Pump PDF.)


Electrical Systems

Synergy designs electrical systems for limestone and aggregate quarries. The original quarrying operation on Texada Island was built in 1973 to provide crushed limestone to the cement, agricultural and chemical industries…

(Click here to see Texada Quarrying Ltd. PDF.)


Lauhoff—Saving Energy

Controlling belt speed does not significantly reduce energy costs, as presented in a recent technical paper by Hans Lauhoff: "The energy consumption of long, horizontal belt conveyor systems in stationary operating conditions is determined by the motion resistance."

(Click here to see Speed Control on Belt Conveyors—Does it Really Save Energy? by Hans Lauhoff PDF.)


Design Fundamentals for Drive Systems on Conveyors

The combination of a number of factors can result in conveyor drives being undersized or operating in an unsuitable manner. Some of these factors include:

• The trend to reduce drive sizes by reducing friction coefficients.
• The trend towards using squirrel cage induction motors under variable voltage variable frequency controls combined without considering the drive characteristics.

(Click here to see Design Fundamentals for Drive Systems on Conveyors by Luke Meakin and Peter Saxby PDF.)


The Right Drive to Maximize Efficiency and Production for Large Overland Conveyors

This paper examines various drive systems available for large overland conveyors, with special attention to starting and operating methods with respect to two most commonplace drives, the VFD (for squirrel cage induction motors) and the SRC, secondary resistive controller, (for wound rotor induction motors).

(Click here to see The Right Drive to Maximize Efficiency and Production for Large Overland Conveyors by Nicole Hampton, P.Eng PDF.)