Phase Converters

About Rotary Phase Converters

Rotary Phase Converter runs 3 phase equipment at Full Rated Power from a single-phase power source.

A rotary phase converter is the most popular and universal type of phase converter. The rotary phase converter consist of two components.  An “idler generator” and a “control panel”.  The electric control panel includes a start circuit to start/stop the idler generator and capacitance to balance voltages between phases. The idler generator is energized by the single phase power spinning a rotating mass.  This rotation generates a third line of power which is coupled with the 2 single phase line to make 3 phase power.

What will a rotary phase converter run?   A rotary converter will run every type of load (motor, resistive and inductive loads).

There are 3 types of rotary phase converters:

  • Standard Rotary Phase Converter
    • Pro-Line (PL) with digital start circuit.  Pro-Line Rotary Phase Converters are a general purpose economical all around phase converter for every type of load.  Good for food service equipment, woodworking and metalworking machine tools.
  • Digital Rotary Phase Converters
    • Smart-Boost™ (SB) with digital current boost mode.  Smart-Boost™ Digital Rotary Phase Converters are a power-packed converter with current booster for those hard starting / high inertia loads.  Better for fans, blowers, dust collectors, larger flywheel, pumps, and compressors.
    • Smart-Phase™ (SP) with active digital voltage balancing.  Smart-Phase™ Digital Rotary Phase Converters have electronic stability control powered by an 8 stage automatic voltage regulation controller.  Best for CNC machines, AC drives, and voltage-sensitive equipment.
  • Rotary Converter Control Panels
    • CP (add your own idler motor)

The importance of properly sizing a rotary phase converter cannot be overstated. Proper sizing will insure years of trouble free performance for your equipment. If at any time you have questions about sizing a rotary phase converter, please call one of our application engineers at 877-545-2926. Note: You can never over size a phase converter; there are no minimum load requirements for a North America Rotary Phase Converter.

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