Graham Motors and Controls

Permanent Magnet Cycletrol ® DC Motors

Graham Transmissions' permanent magnet DC motors are optimized for rapid cycling use with Cycletrol Series DC controls. All motors are in-stock for prompt delivery.

  • Designed to industry-standard NEMA frame sizes
  • 13 models rated from 1/8 to 5 HP
  • Easy access to brushes for quick brush replacement
  • Non-vented and fan cooled versions
  • UL recognized
  • For use with 120/240 VAC single phase silicon controlled rectifier (SCR) drives
  • 90/180 volt armature motors have 1,800 RPM base speed.

MOC-1 Motor Overload Controls

The MOC-1 monitors motor load and provides a latched "alarm" contact if an overload occurs. An adjustable time delay allows the MOC-1 to ignore normal acceleration currents without nuisance tripping. The MOC-1 is frequently used to shut down an overload system before motor or machine damage can occur.

Cycletrol® Series DC Controls

Graham Motors and Controls® Cycletrol® Series DC adjustable speed controls provide rapid cycling capabilities, while offering higher reliability and lower maintenance compared to clutch/brake mechanisms. The Cycletrol Series consists of two product lines, the 150 Series rated for up to 60 cycles/minute and the C2000 rated for up to 30 cycles/minute.

Common Features:

  • All Cycletrol digital logic inputs are optically isolated
  • Versatile logic allows direct interfacing with switches and push-buttons or solid state devices
  • LED function lights are easy-to-see indicators of control status
  • Transient protection by voltage-clamping MOV's and RC networks protect p... Read More

Vari Speed® A2000 series

The Vari Speed® A2000 is compact, rugged, reliable and flexible. Available in 1/2 - 3 HP control rating configurations, the Vari Speed A2000 Series incorporates surface mount technology to reduce package size and improve reliability.

The Vari Speed A2000 may be ordered with isolation, NEMA 12 or NEMA 4 enclosures.

  • Compact, extremely rugged speed drive for standard permanent magnet or would-field DC motors
  • 120 or 240 VAC line input
  • Nine models rated for 1/8 to 3 HP
  • Available in chassis, NEMA 12 or NEMA 4 enclosure
  • LED status indicators for Power On, Run, and Current Limits
  • Chassis units are UL and cuL listed.

Vari Speed R400 Speed and Torque Control for 1/4 to 2 hp DC Motors

The Vari Speed® R400 is a full-wave DC regenerative control that provides high performance four quadrant speed and torque control. The R400 solid state controller converts single phase AC line power into an adjust able DC power to control 1/4 to 2 horsepower DC motors.

The R400's flexible design is easily selectable for speed or torque mode, tachometer voltage, dual voltage and for horsepower size. The R400 is designed with today's most desirable features including isolated input signals, status indicators, alarm outputs. When performing frequent directional changes, the R400 trans fers excess system energy back to the AC line rather than wasting additional energy by the use of a dynamic brake resistor.
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