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A single phase to three phase converter allows businesses, workshops, and industrial facilities to operate three-phase equipment using standard single-phase electrical service.
These systems generate balanced three-phase power so machines such as CNC equipment, compressors, pumps, welders, and industrial motors can run reliably even where utility three-phase service is not available.
American Rotary manufactures high-performance single to 3 phase converters designed to convert existing single-phase electricity into stable three phase power for a wide range of industrial and commercial applications.
Explore American Rotary 3 phase power converters designed to generate reliable three-phase power from single-phase electrical service for workshops, farms, manufacturing facilities, and industrial equipment.
Explore real installations, customer stories, and step-by-step guides from the largest phase converter video library on YouTube.
Watch how American Rotary power runs CNC machines, welders, farm equipment, woodworking tools, and more — all with clean, steady, reliable power built in the USA.
Our Advantages
In-stock equipment ships quickly so you can keep your operation running without delays.
American Rotary equipment is designed for real-world shop environments, with reliable components and proven performance.
From common applications to specialized setups, we stock a range of solutions ready to ship. If you don’t see what you need, we can help source it.
Choosing the right equipment matters. Our team helps you select the correct solution based on your application and requirements.
My old rotary phase converter gave 30 years of faithful service before it went up in smoke. With customers asking when I’d be operational, I researched every manufacturer and the choice was clear on American Rotary. First impression when it ... READ MORE
FAA Certified Machine Shop Owner
Very good company to do business with. The salesman Lenny treated me like I was a big company. I was shopping for a roto phase for my home machine shop. He had all the time in the world for me. ... READ MORE
Rodney Mears
A quick google search pointed me toward American Rotary. It wasn’t their website or their pricing but the number of videos and testimonials about the quality of their product and the great service. I wasn’t disappointed. I called on a ... READ MORE
Carl DiPaolo
I purchased this unit for a tenant in a commercial property that needed 3 phase power and the cost for the utility company to bring it in was significantly higher with much longer times to complete the project. The phase ... READ MORE
Matt Peace
I tried an inexpensive digital converter that made my machine motors very hot due to unbalanced power. A person I bought a milling machine from said he had an American Rotary and was very happy with the quality, so I ... READ MORE
Brad Everett
When I started, the garage had a single 120 V receptacle behind a shelf. Now, there (4) duplex 120A receptacles, (1) NEMA 16,20 A 240/120V with a DPDT switch to select voltages. 30A 50A 1 phase receptacles. Two 20A, one ... READ MORE
Raymond Jensen
I called in a talked to a representative told them I have a refrigeration unit I was looking to run 3 phase to, gave them the specs and was recommended the ADX 10. I ordered it super fast shipping got ... READ MORE
Jonathan Arrington
I had to move my workshop due to rent increases. The one I found didn’t have 3 phase. I found some cheap crappy digital shifter…didn’t work. Then I found American Rotary, they are the real deal! I am able to ... READ MORE
Mike Chinn
para todos los hispanohablantes America Rotary 100% recomendado fácil de instalar fácil de manejar fácil de cablear todo perfectamente gracias por su ayuda para poner en funcionamiento mi máquina edgebanding 3 Phase For all Spanish speakers, American Rotary 100% recommended. ... READ MORE
Neftaly Bustos Custom
Just got my ADX 5 up and running couldn’t be happier with my decision to purchase this excellent customer service and tech support. A++++++
... READ MOREMark Anderson
Absolutely love what american rotary does. Had a wonderful experience with their support team the phase converter we purchased and the transformer were supper easy to install definitely recommend buying from them. Customer service is 10/10
... READ MORECustom Machined Concepts | Andrey Girenko
American Rotary is an awesome company to work with, Mike was/is very helpful in answering my questions and getting me what I needed to get my shop ready for a new machine, giving me an option to either piggy back ... READ MORE
Charles Nelson
A single-phase to three-phase converter allows equipment designed for three-phase electricity to operate using standard single-phase electrical service.
Three-phase power is commonly used in industrial environments because it allows motors to run more efficiently and deliver higher power output. However, many workshops, farms, and small manufacturing facilities only have access to single-phase electrical service.
A phase converter solves this problem by generating balanced three-phase power so machines such as CNC equipment, compressors, pumps, and welders can operate normally without installing utility three-phase power.
Phase converters work by creating an additional electrical phase from an existing single-phase power supply.
Most rotary phase converters use an idler generator motor that produces the third leg of power required to operate three-phase equipment. The converter control panel manages the start and run circuits to generate balanced three-phase voltage.
Once running, the converter produces stable power that allows machines designed for three-phase electricity to operate safely and efficiently.
Learn more: How Does a Phase Converter Work?
Three-phase motors provide smoother operation, higher efficiency, and more consistent power compared to single-phase motors.
However, many facilities only have single-phase service available, and installing utility three-phase power can cost tens of thousands of dollars depending on the distance and infrastructure required.
Using a three-phase converter allows businesses to run industrial equipment without upgrading their electrical service.
Common applications include:
Yes, a rotary phase converter can run multiple machines as long as the total running load does not exceed the converter’s rated capacity.
Many workshops use a single rotary phase converter to power several pieces of equipment such as CNC machines, pumps, compressors, or shop tools. Machines can operate individually or at the same time as long as the combined electrical load remains within the converter’s capacity.
Proper sizing of the phase converter ensures reliable startup performance and stable operation when multiple machines are connected.
Static vs Rotary Phase Converter
Feature
Static Phase Converter
Rotary Phase Converter
Power Output
Motor runs at roughly 2/3 of rated capacity
Power Generation
Equipment Operation
Voltage Balance
Best Applications
Industrial equipment such as CNC machines, welders, compressors, pumps, and production machinery
Reliability
Designed for continuous operation and heavier loads
