Motion Control & Drives


PACked with performance: efficient speed control for pumps and fans

July 2008 Motion Control & Drives

In many industrial nations, electric motors account for more than half of the electricity consumption, which offers enormous energy saving potential. Speed control can easily reduce the excess energy requirements; and besides the saving of energy, a decrease in speed also offers a reduction in noise and an increase in the service life of the motor.

The speed controller is extremely compact and is housed in a standard bus terminal with a width of 12 mm
The speed controller is extremely compact and is housed in a standard bus terminal with a width of 12 mm

Beckhoff has expanded its Bus Terminal I/O offering in response to the need. The new KL2791 Bus Terminal is designed for direct connection to single-phase AC motors up to 100 W, enabling speed control of capacitor, universal and shaded-pole motors. This method is well suited to motors with fixed loads such as pumps and fans. The motor speed set-point being specified by a 16-bit variable in order to achieve flow rates from 10 to 100%. The motor is switched on and off with a practice-proven mains-synchronous pattern, which reduces power consumption further through controlled acceleration and deceleration.

The units are suitable for use in any bus system supported by the Beckhoff Bus Terminal system.



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