WHAT ARE FREQUENCY CONVERTERS:

Frequency Converters for 400Hz, 100Hz, 60Hz, 50Hz, & 25Hz

Frequency Converters, also called a Frequency Changers, convert 50Hz and 60Hz to 400Hz power.  This is done either by means of a double conversion Static Frequency Converter or by using a motor generator set called a Rotary Frequency Converter.  Frequency converters are machines that convert power from one frequency to another frequency.  Either by means of a double conversion Static Frequency Converters or by using a motor  generator set called a Rotary Frequency Converter.  In the double conversion method, the Rectifier converts AC into DC and the Inverter converts DC back into AC.  In an Motor Generator set, this is completed by either changing the rotational speed of the generator in the versions with belts & sheaves or the gear box and by means of motors and generators with a different number of poles operating to achieve the same result of producing the desired output frequency.

Examples of Frequency Converters:

Single Phase Converter:

Series SFC1 (Single Phase Static Frequency Converter) has a versatile communications platform allowing for local, network, or remote monitoring & controls. Communication packages include RS-232 Serial port, as well as, USB. PS&C has invested a great deal of time in developing this sophisticated communications package for today's technologically savvy customer. By adding a battery to the Series SFC1, this frequency converter will turn into a Frequency Converter UPS.

Static Frequency Converter:

Series SFC3 Phase Static Frequency Converter utilizes 6 and 12 pulse, as well as, "IGBT" topology for the most efficient solid state frequency conversion available. This advancement gives PS&C's converters a great advantage over other conventional converters. PS&C has avoided utilizing older technology in our products, which allows this machine to support equipment in the most extreme electrical conditions. By adding a battery to the Series SFC3, this frequency converter will turn into a Frequency Converter UPS.

Dynamic Frequency Regulator:

Series DFR will provide the same uncompromising reliability as all of Power Systems & Controls equipment as it is based on our hybrid rotary technology. The frequency regulator is available from 25 – 500kVA. Our commitment to power quality supported the development of this industrial grade product that will correct the frequency and voltage simultaneously. This reliability coupled with the long life design gives the Series DFR a distinct advantage over all other regulators on the market today.

Rotary Frequency Converter:

Series RFC incorporates the proven technology of Motor Generator Sets. The Rotary Frequency Converter provides the equipment with reliable power while simultaneously converting the input voltage and frequency. The RFC acts as a rotating filter protecting the critical load from transients and blowouts. In general, it is 100% effect for outages less then 100m sec. Our models are available with either a synchronous or induction motor, and is offered in horizontal or vertical configurations.

Computers and small electronics operate with switch mode power supplies capable of operating at both 50HZ and 60HZ.  In this case the only item you may need is a plug converter as 50HZ outlets are not the same as 60Hz outlets for the following reason.  As 60Hz and 50Hz operate at different frequency, you do not want to plug equipment into the wrong power source.  However, if your equipment is operating at 208V (which is used for both 50Hz and 60Hz), you might be OK.  If not,  you run the risk of damaging equipment and or harming yourself.  Once you let the smoke out of the equipment, you cannot put it back in.

Larger and 3 phase equipment cannot operate on the wrong frequency.  This can cause damage or premature wear on the equipment. 50 Hz designed equipment cannot operate at 60 Hz.  If you force the equipment to operate outside its design criteria, there will be trouble.  Most likely, the equipment will be damaged immediately (remember the smoke)?  If not immediately, it will fail over time from fatigue and overheating.  With our ever growing global economy, equipment from other parts of the world are being used more frequently in countries that they were not manufactured in.

This usually results in the need of a Frequency Converter (also called a frequency changer).  This will change the local utility’s frequency (and sometime its voltage) as needed.  As a result, it will be compatible with the power requirements of the equipment you are trying to operate (also called the load).

Which Industries Need Frequency Converters:

Specific industries have unique frequency requirements and this is based on how they supply power to their equipment.  Aviation and Weapons systems require 400Hz, therefore equipment used on the ground operating at 400Hz require ground power support for the electrical system.

In addition to aviation and military using 400Hz,  Rail utilizes 25Hz, 91.66Hz or 100Hz to run their signaling systems. Ship yards and boat docks require shore power conversion.  Ships built in 50HZ countries have electrical power systems operating at 50HZ.  In this case you will need a frequency converter to match the electrical needs of ships being built, repaired or docked. There are also many unique and/or variable frequencies needed in laboratories and testing facilities.

When equipment manufactured in one country and used in another, chances are that you not only have to convert the voltage, but you will also need to convert the frequency.  The most common frequencies are 50Hz and 60Hz as they are used in most commercial machines, however, there are many applications not related to this issue that need for frequency converters. Hydro power, for example produces 25Hz.

So WHY are there so many different frequencies?  It is very basic and has to do with the RPM that the prime power producer spins at. 1500 RPM=50Hz, while 1800 RPM=60Hz utilizing a 4 pole synchronous generator.  With the globalization of the world’s economies intensifying, the need for frequency conversion is increasing as multinationals from 60Hz countries are doing more business in 50Hz countries and vice-versa.