Using the wrong phase converter can damage machinery, injure workers, and ultimately shorten the lifespan of the phase converter you have. This is why it’s crucial to choose a rotary phase converter that has the correct horsepower and is designed for your particular industry. To help you choose the correct system for your industry, we have created an outline of tips that are designed to make your decision easier for your unique application.

What Is a Phase Converter?

If you are wondering what a phase converter is utilized for, it is a system that is engineered to create and maintain three-phase power. A phase converter—also known as a rotary phase converter—is a system that converts single-phase power into three-phase power. The bigger the machinery is that you’re using on a job, the more power it needs to operate. Rotary phase converters are designed to convert single-phase power into three-phase power, but they also provide single-phase power when you need it.

Why Are Phase Converters Utilized in the Welding & Metalworking Industries?

The welding and metalworking industries need phase converters because they use heavy machinery that require a high level of reliable power to operate effectively. On the other hand, household or residential appliances such as microwaves and ovens only require single-phase power to operate because the applications they fulfill are less demanding. However, industrial machinery requires three-phase power because these types of systems require a large amount of energy. Even if only some of your equipment requires three-phase power, go ahead and invest in a phase converter so you can have three-phase power whenever you need it. You’ll save money in the end and avoid unnecessary headaches.

Choose the Right Phase Converter

Follow this step-by-step guide to choose the right phase converter for your industry:

  • Ensure that you have enough single-phase power to convert into three-phase power.
  • Know whether your machinery load is light, medium, or heavy.
  • Know how small or big your load is (i.e. horsepower, amps, kilowatts).
  • Place your phase converter in a separate, protected area.
  • Buy your phase converter from a reputable manufacturer—such as Phoenix Phase Converters—to ensure your product will be high-quality, efficient, and last a long time.

Using Rotary Phase Converters in the CNC Machining Industry

CNC is a term that stands for Computer Numerical Control. CNC machining is the method by which pre-programmed computer software controls machinery used during product manufacturing. CNC machines need a steady, reliable power supply to function properly and avoid getting damaged. Rotary phase converters come into play because they provide reliable, continuous, three-phase power when you need it. Since CNC machines require a particular voltage balance to perform properly and last a long time, be careful to choose the correct rotary phase converter for your equipment.

Shop & Compare: View Our Selection Of Rotary Phase Converters For Your Application

Know the Benefits of Investing in a Rotary Phase Converter

If you work in the welding, metalworking, or machining industries and need reliable, continuous three-phase power to increase equipment performance, you should invest in a rotary phase converter. They get any job done quicker and more effectively. Check out the main benefits of investing in a rotary phase converter.


Rotary phase converters enable your heavy equipment to run more efficiently by providing the higher level of power that they require. Heavy machinery that runs on single-phase power is slower and ineffective. When you invest in a rotary phase converter, the single-phase power converts into three-phase power which speeds up the process. When you don’t need three-phase power, the rotary phase converter motor runs idle. That way you don’t waste any power that’s not being used.


Investing in a rotary phase converter will save you money in the long run. Powering heavy equipment with single-phase power will wear down the equipment more quickly, requiring you to replace it more often. Additionally, it costs more to get three-phase power on demand from your electricity provider than it does to purchase a rotary phase converter that will provide the power in-house. You also don’t have to rewire your equipment to accommodate a three-phase power source.


While it’s a significant financial investment initially, rotary phase converters last for years when they’re stored in a safe environment and maintained properly. You can rest assured that your investment will be more than worth it in the end.