Phase Converters & Power Factor
Phase Converter Efficiency
Installing a Phase Converter
Rotary Phase Converters
Static Phase Converters
VFDs as Phase Converters
     • Harmonic Distortion
Three-Phase Motors
Phase Converters & Voltage Balance
Phase Converter Applications
     • Submersible Pumps
     • Woodworking Equipment
     • Dual Lift Stations
     • Phase Converters & Welders
     • Phase Converters & CNC Machines
     • Phase Converters & Air Compressors
     • Phase Converters & Elevators
     • Phase Converters & Wire EDM
     Phase Converters & HVAC
Phase Converters & Transformers
     • Step-up Transformers
     • Buck-Boost Transformers
     • Isolation Transformers
Phase Converter Experts
Digital Phase Converters
Regenerative Power
Three-Phase Power
     • Delta vs. Wye Configured Power
Motor Starting Currents

Phase Converters and Woodworking Equipment


Woodworking enthusiasts are finding that modern equipment is increasingly becoming three-phase because of the better reliability and performance of three-phase motors over single-phase.

Computer numeric controlled (CNC) woodworking equipment is not that common and is usually a CNC router used by commercial and industrial shops.  Woodworking hobbyists typically operate 10 HP or smaller manual machines in their shops.  If these motors are lightly loaded and intermittently used, even a low cost static converter may operate the equipment safely.  However if a static converter is used, the motors will not develop full horsepower,

and if loaded to anything more than about half their rated capacity, the motors will likely be damaged.

A rotary converter is a more versatile solution for the common woodworking shop because it can operate multiple motor loads.

The voltage balance of a rotary converter is likely to be better than that of a static converter, but can still present a problem if the motors are fully loaded.  A rotary converter can produce balanced voltages at only one load point, and the typical end-user cannot predict or control the voltage balance.  Voltage imbalance between the phases of just 5% requires that a motor be de-rated by 25%.  Rotary converters are not very efficient, usually about 80%.  The inefficiency may not be of much concern for a hobbyist as

the loads are usually small and use is intermittent, but for commercial operations or in areas where electricity costs are high, the inefficiency of rotary converters can cost significant amounts.

Phase converting VFDs work well in most woodworking shops if the equipment consists of small single motor loads with no CNC controls. Installation of the VFD can be inconvenient because one is required for each motor in the shop and the controls of the machine must be bypassed, wiring the output of the VFD directly to the motor leads.

Digital phase converters are a versatile solution for woodworking shops, producing high quality three-phase power that can be used like utility three-phase to power all the three-phase equipment in the shop.