Your Guide to 3-Phase Converters

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A 3-phase converter allows you to run a 3-phase machine on single-phase power. These single to 3-phase converters offer versatility and convenience. Types to consider include rotary, static, and CNC convertors. Knowing the differences provides you the best power option for your specific application needs.


Rotary 3-phase Converters

Rotary 3-phase converters create true 3-phase power suitable for running a combination of 3-phase motors and any type of load. Reliable and flexible, they convert single-phase power to 3-phase. Rotary converters can manage 100 per cent of a motor's nameplate horsepower ratings, do not have limits on load starts, offer variable load ranges, and have a horsepower range of 1 to 500. They have an efficiency of more than 95 per cent at full load and require minimal maintenance.


Static 3-Phase Converters

Static 3-phase converters cannot balance the load between the three phases as effectively as rotary converters do. These devices typically generate a third power phase on startup, which switches off and leaves motors running on two of their three windings. This can damage some types of motors when they run under a full load. They are not suitable for rectifier loads or for heaters. However, consider a static converter if the motor you need to power starts quickly and less than four times an hour, and if the motor runs at less than 70 per cent of its stated horsepower. Static converters are not suitable for multiple motor loads, have limited variable load range, and have a horsepower range of 0.5 to 20. However, these converters have no maintenance requirements, run at 99 per cent efficiency at full load and are more affordable than rotary converters.


CNC and Digital 3-phase Converters

CNC phase converters are types of rotary phase converters with a balanced 3-phase output. People use these phase converters to supply 3-phase power to the sensitive computers in CNC machines. You can also opt for a digital 3-phase converter, an advanced type of CNC phase converter. It uses a digital signal processor to monitor phase conversion action and continually adjusts input and output to produce perfectly balanced 3-phase power under any load conditions. This is the most expensive type, but it delivers superior performance, which improves the operation and lifespan of equipment.


Choosing Between the 3-phase Converter Types

To run a single 3-phase motor that starts infrequently, choose a static converter to save money. For more reliably and versatility, opt for rotary converters. Those with a large budget can buy digital 3-phase converters for the best performance.

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