CONVEYORS Design fundamentals for drive …

22 Australian Bulk Handling Review: March/April 2009 CONVEYORS1. KeywordsConveyor, conveyor drive , multiple drive , drive control system, variable voltage variable frequency control, variable speed drive , variable frequency drive , second-ary resistance control (SRC), squirrel cage induction motor (SCIM), wound rotor induction motor (WRIM), fluid coupling, electronic soft starter, direct on line start, breakaway torque, acceleration torque, conveyor resistance forces, conveyor ef-ficiency, conveyor drive SynopsisThe combination of a number of fac-tors 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 coefficientsThe trend towards using squirrel cage induction motors under variable voltage variable frequency controls combined without considering the drive characteristicsNot analysing the operation and in- teraction of fluid couplings with the motor torque not allowing for break-away resistances, or not allowing for some components of break-away resistancesNot allowing f

22 Australian Bulk Handling Review: March/April 2009 CONVEYORS 1. Keywords Conveyor, conveyor drive, multiple drive, drive control system, variable voltage variable frequency control, variable speed

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  Design, Drive, Fundamentals, Conveyor, Conveyors design fundamentals for drive

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