THE 3 PHASE POWER
RESOURCE SITE

3 Phase Power Grain Dryer
3 phase power is used today for many applications ranging from the above grain dryer to saw mills, conveyer belt systems, refrigeration and air conditioning, etc.

3 Phase Contents
- 3 Phase Power Home
- 3 Phase Wiring
- 3 Phase Power Calculation
- 3 Phase Power Converter
- 3 Phase Converters
  * Rotary Phase Converters
  * Static Phase Converters
- 3 Phase Generators
- 3 Phase Transformers
  * 3 Phase Isolation Transformers
- 3 Phase Motors
- 3 Phase Electricity
- 3 Phase Power Loads
- 3 Phase Frequency
  * Frequency Converters
- 3 Phase Distribution
- 2 Phase Systems
- 1 Phase Loads on 3 Phase Power
- 3 Phase Loads on 1 Phase Power


3 phase power three phase power three phase electricity three phase generator 3 phase converter, rotary three phase

  

3 Phase Converters

To Buy 3 Phase Converters
We Recommend ACE Brand.
Call 1-800-967-7217
Web Link:  3 Phase Converters

3 Phase Electrical Power Converter
Often the advantages of three-phase power for motors and other 3 phase equipment make it worthwhile to convert single-phase to three phase power.  Rural business or farm properties, and urban residential area power consumers, may not have access to a 3 phase supply, or may not want to pay for the extra cost of a 3 phase service, but may still wish to use three-phase equipment. Some of such 3 phase converters may also allow the frequency (see also frequency converters) to be varied allowing for different equipment frequency requirements (50Hz, 60Hz, 400Hz, etc.) and also for motor speed control (VFDs).  Some locomotives are driven by 3-phase motors with 3 phase converters converted from the incoming supply of either DC or 1 phase AC.   The two main types of 1 phase to 3 phase converters are Rotary Phase Converters and Static Phase Converters.  Read below for more about 3 phase converters.
3 Phase Generating Phase Converter
There is a big difference between phase converter types available on the market today.  Most 3 phase converters sold by companies today do not produce actual balanced 3 phase power.  This is why is very important to select a 3 phase generating phase converter which will run on single phase power and generate true balanced smooth 3 phase power.  Below is a comparison of several technologies available today.
TEMCo 3 Phase Power Converter
3 Phase Converter Types and Comparison
Good old fashioned research will help guide you to make sure that you are able to get the proper product to give you balanced 3 phase power.  The US Phase Converter Standards Organization has some excellent guides to help choose the appropriate technology for your need comparing them side by side.  Check out their Phase Converter Type Comparison Chart to read about the strengths and weaknesses of each type side by side with their ratings on quality, durability, safety, and 3 phase power quality produced.  They also offer a useful 3 Phase Converter Resources page.

Rotary Phase Converters
The most common type of phase converter is the Rotary Phase Converter.  Not all Rotary Phase Converters are the same.  Many just convert single phase power into unbalanced 3 phase power, while the best kind that we were able to find will actually generate true balanced 3 phase power.  This is the best kind to use.  There were only a few companies who manufacture this type with the most notable brand being TEMCo Phase Converters.  A few other companies called this type of 3 phase generating rotary phase converter a motor generator set.  

Static Phase Converters
The next most common type of phase converter is called a Static Phase Converter.  These can only be used on 3 phase motor loads.  These units only generate a 3rd leg of power during start up but then turn off leaving motors to run simply on 2 out of 3 of their windings.  This can damage some types of 3 phase motor loads by over heating the motor and burning it out when it is put under its full load.  Many times a load has 3 phase circuitry and not simply a motor load so it will not even work with a static phase converter.  Read more about Static Phase Converters here.

Analyzing "Build Your Own Phase Converter Plans"
There is a lot of info out there about how to Build Your Own Phase Converter Plans, but most of these actually are simply showing how to use the equivalent of a static phase converter with an inferior electric motor as a generator and can waste valuable time and capital.  Read the US Phase Converter Standards Organizations site for more info on these and the other types below.

Understanding Phase Inverters and VFDs
There is a product sometimes referred to as a Digital Phase Converter.  Sometimes this is a just a marketing term, and other times this is to say that it does not have any moving parts and has a circuit that calculates part of the output.  These tend to be very sensitive and are prone to damage if a circuit has a spike or feedback from your 3 phase load. Others are simply a Phase Inverters also known as a variable frequency drive (VFD).  These are manufactured to control the speed of electric motors and can run some 3 phase motors on single phase but cannot power any other type of 3 phase load
These solid-state inverters are only used to power some 3 phase motors from a single-phase supply.  They are never used for a mixed type of load and are very sensitive.  They also have a short operational life.

The last common type is the CNC Phase Converters. These are simply a Rotary Phase Converter with more balanced 3 phase output manufactured to provide 3 phase power to sensitive computers that are a part of CNC machines.  

1 Phase Loads on 3 Phase Power
1-phase loads may be connected to a three-phase system in two different ways.  This can be done either by connecting across two live conductors (phase-to-phase connection), or by connecting between a phase conductor and the system neutral, which is either connected to the center of the Y (star) secondary winding of the supply transformer, or is connected to the center winding of a delta transformer (High Leg Delta system). Single-phase loads should be distributed evenly between the phases of the 3 phase system for efficient use of the supply conductors and supply transformer.   Click here to read more about connecting a 1 phase load to a 3 phase power supply line.

Continue And Read About Additional 3 Phase Power Details:

- 3 Phase Power Home
- 3 Phase Wiring
- 3 Phase Power Calculation
- 3 Phase Electricity
- 3 Phase Power Loads
- 3 Phase Power Converter
- 3 Phase Converters
  * Rotary Phase Converters
  * Static Phase Converters
- 3 Phase Generators
- 3 Phase Transformers
  * 3 Phase Isolation Transformers
- 3 Phase Motors
- 3 Phase Frequency
  * Frequency Converters
- 3 Phase Distribution
- 2 Phase Systems
- 1 Phase Loads on 3 Phase Power
- 3 Phase Loads on 1 Phase Power

Contribute 3 Phase Power Articles to The 3 Phase Power Resource Site:
If you would like to contribute additional 3 phase info to our 3 phase power resource site please feel free to email your 3 phase power article to us at info@3phasepower.org.  By doing so you are giving us full rights to edit and distribute the info freely worldwide in perpetuity in any way we see fit.  Note that The 3 Phase Power Resource Site is run by all volunteers and thus we do not have the ability to respond to all emails.  Also not all info submitted will be added to the site.  It is at the sole discretion of our electrical editors.  Thank you for contributing! 

 

Smooth 3 Phase Power Wave Form (center)
Because of its smooth wave length properties, 3 phase electrical power is used across the U.S. and throughout the world.



3 Phase Transformer

3 Phase Substation Transformer
(above)
There are a variety of 3 phase transformer types and voltages, depending on your power needs.


3 Phase Power Saw

3 Phase Power Saw (above)
There are a whole variety of power equipment and power tools which require 3 phase power to run.


TEMCo 3 Phase Converter

3 Phase Converter
(above)
Some Types of Rotary Phase Converters will run on 1 phase power and generate 3 phase power to run other 3 phase equipment.


 
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