Power controller promises smoother processes
A
REO product story
Edited by the Engineeringtalk editorial team
Aug 10, 2005
A novel power controller operates on the phase-angle principle but, unlike traditional systems, it reduces harmonics (power factor) and provides a smoother process.
A new power controller, employing novel technology has been developed by REO.
Called the Reotron, the controller operates on the phase-angle principle but, unlike traditional systems, it reduces harmonics (power factor) and provides a smoother process.
The unit can be used for voltage, current or power regulation.
The Reotron produces two output voltages simultaneously; one is adjusted by firing the thyristors at a variable phase angle; the other is permanently on full conduction but at a lower voltage level.
This avoids abrupt switch-on of current at the firing-angle.
The two outputs are combined by interposing a transformer, with two primary windings, between the controller and load.
Possible applications include water treatment, electroplating, lasers, smelting, heat-treatment and metal coating.
The standard Reotron controller is built as a module with busbar, snap-on connections and it has a digital control panel for setting up operating parameters.
It can also be provided with a choice of fieldbus interfaces for applications where a number of control stations are run and monitored from a central, supervisory system, such as a PLC.
The concept provides a solution for situations where a cost-effective power regulation method is required but without undesirable harmonic voltage distortion on the mains supply and a power factor which is close to unity.
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