Rotary phase converters use a generator motor to convert single-phase power to three-phase, which your equipment needs to start up and run. A rotary converter supplies continuous three-phase power to the machines connected to it for safe, reliable, and balanced operation.
American Rotary Digital Rotary. I have installed lots of Rotary phase converters to run CNC equipment and here is what I have learned. 1. Retrofits usually have single phase controls so wire them to the single phase line. Then the voltage balance does not matter so much on a motor spindle unless it is VFD controlled.
American Rotary engineers the entire phase converter system to provide optimum performance. Our soft start generator and MicroSmart TM controller combine to make the most powerful and precise rotary phase converter on the market.
Static and rotary phase converters both turn standard single-phase electricity into three-phase power for heavy-duty equipment. The difference is that a static phase converter will start a three-phase load, but run it under lower power, while a rotary phase converter creates continuous, well-balanced three-phase power.
Smart-Phase™ is a digital rotary phase converter that is best suited for voltage-sensitive machines and/or multiple loads running simultaneously. It has the newest advancement in phase converter technology with 8-stage automatic voltage regulation (AVR).
Why would you need to convert single-phase to three-phase power? Single-phase power is the common residential and light-commercial variety supplied by utilities, used in places with smaller electricity loads requiring less power. Three-phase utility service is used in large industries, factories, and in manufacturing units where a large amount of power is required.
But here''s the problem. All kinds of equipment require three-phase power: machines for woodworking, metalworking, CNC machining, foodservice, and farming, milling machines, and lathes just to name a few. A lot of this equipment exists in areas that don''t already have three-phase utility service. And getting it installed is enormously expensive.
To determine which type you need for your application, you first need to understand the difference between the two. This article will help you understand that, as well as your main considerations so that you can make a smart decision.
So, what is a static phase converter? The straightforward static phase converter will start a three-phase load but run it only under single-phase power, limiting the load to about 2/3 of its rated capacity.
Many other types of equipment—vacuum pumps and air compressors being two prime examples—cannot be run at all with a static phase converter. If you decide to go with a static phase converter, make sure that it''s compatible with the power needs of your equipment. Feel free to contact American Rotary for help.
When a static phase converter motor disconnects after starting up your equipment, you''re left with only two "legs" of power distribution. This is the reason the load must be limited to 2/3rds of its rated capacity.
Potential of control refers to what you can power with a phase converter. In the case of a static phase converter, due to the inherent limitations we''ve already cited, only one piece of equipment can be managed at a time.
In cases where you only need the higher power for startup of the machine, then you may be able to rely on a static converter for your needs. In other cases, you''ll ensure greater reliability with a rotary phase converter, which we''ll discuss next.
A rotary phase converter adds a small idler/generator motor (more on this in a moment) and control panel to the design, which gives you continuous three-phase power. This makes it a cost-effective option to provide three-phase utility to your shop.
One of the biggest differences with a rotary phase converter is that, depending on the size of the system, you can run several pieces of three-phase equipment at a time. Rotary type converters are much better suited to large equipment and shops with multiple machines such as welding equipment, ovens and various woodworking machinery.
By supplying continuous three-phase power, a rotary phase converter is a reliable source of balanced power for your equipment. You can safely and reliably run several pieces of equipment at once.
You might have heard that an idler tends to draw a huge inrush current upon start-up, which can cause problems such as demand charges and large increases on power bills. But with all American Rotary phase converters, we use a custom-designed induction generator as our idler that solves this problem decisively.
Our VIT Induction Generator is a true soft start idler that uses 1/3 of the inrush current of a comparable three-phase motor—allowing you to run the phase converter 24/7 at little to no load without any negative effects. These idlers run very smoothly, quietly and efficiently.
This term sometimes refers to a solid-state phase converter, a patented design that uses a series of variable frequency drives, also known as vfds, with capacitors to provide three-phase power. In many other cases, the term refers to a rotary phase converter that is digitally controlled.
The complex solid-state phase converter design is capable of providing a precise voltage balance of 1% or better. But these systems also have some reliability drawbacks: the models currently available come with only limited warranties, and they can be difficult and expensive to troubleshoot due to their complexity (100''s of internal components).
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