Dynamatic adjustable speed drives and digital controls are the smartest choice

When selecting an adjustable speed drive, it is necessary to select the drive that will perform the intended function at the lowest life cycle cost. The minimization of total cost coupled with careful attention to maintaining high operating speeds will result in the opportunity to generate increased profitability for the user. An Eddy Current drive with its inherent simplicity, ruggedness and performance features is your strongest candidate for lowest life cycle cost.

The acquisition cost of a drive system is generally the easiest to identify

Because Eddy Current drive systems are inherently simple and require fewer full power handling components, they have significantly lower acquisition costs. An Eddy Current drive has only two power conversion items, the motor and the clutch, to handle the full power. In general, the motor starter can be connected directly to the plant power distribution system appropriate for its HP rating.

Variable Frequency Drives (VFDs) with full power solid-state conversion units generally require a full-rated isolation transformer to minimize the effects of harmonic distortion on the power system. The controller for the Eddy Current drive is a low-power unit easily connected to any 115/230/460 single-phase power source.

Eddy Current drive systems can typically be 20% less than that of DC or AF drive systems. In applications such as stamping presses, VFD systems are typically oversized and require NEMA-D design AC motors to insure sufficient torque is available. Additionally, dynamic braking is frequently required to absorb the regenerative power from the flywheel. All this adds significant cost and also decreases operating efficiency. Also, care must be taken to insure that the AC or DC motor can withstand the overhung load requirements of stamping press applications.

Installation costs are minimized with an Eddy Current system

Because each drive type has different system components, foundations, wiring, and cooling costs may also vary. DC and AFD controllers are generally packaged in large NEMA I convection or forced air-cooled enclosures which are susceptible to contamination. DC and AF controllers and transformers require additional floor space and installation labor. Often it is necessary to locate the conversion units remotely due to floor space limitations and at times in their own specially constructed “clean room”. Eddy Current controls, on the other hand, are small and can be located adjacent to the drive to minimize inter-connect wiring. When the environment dictates, they are easily packaged in totally enclosed NEMA 12 cabinets.

Why Choose Eddy Current as Your Solution?

  • Minimize and reduce downtime
  • Maximize the availability of the machinery to perform its intended function
  • Simple to install, use, and maintain
  • Reliable source of variable speed
  • Lower maintenance and repair costs
  • Readily serviced by plant maintenance personnel with basic troubleshooting
  • Simple control that can operate drives from 1/4HP to 200HP
  • Spare parts inventory costs are kept to a minimum
  • Entire control can be replaced for a fraction of the cost of others on drive systems up to 200HP
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