Alstom Frequency Stabilizer System
Published on 27 September 2020 06:20
Alstom has provided its freight locomotive with an air conditioning system that works based on frequency generated by generator resulted by internal combustion mechanical engine rotational speed.

This logic of operation means that if the locomotive engineer wants to get the best output of the air conditioner system, has to keep it in highest notch. Because when the engine runs in the highest rotational speed, provides highest input for the generator which generates frequency. Air conditioner system is fed by frequency. Electromotor of air conditioner runs between 45 to 430 Hz. 
Tending to the upper limit of this range will result in higher performance of air conditioner system. But there several important and essential faults and problems that we will try to address some of important problem herein: 

1)      When engine runs in the highest RPM, it consumes the most fuel. It means that costs related to this item, increase considerably.

2)      Running in highest speed of engine causes higher rate of amortization of parts. It ends in shorter life cycle of parts and components that has no reflect except impressive high maintenance costs.

3)      Even the times that locomotive or train is stopped in a block waiting for permission, locomotive must run in highest notch. This stagnation and stillness in a place can stay constant for hours. During this time, locomotive crew must have the comfort means available. When engine runs in highest RPM, the level dB generation is significantly high. This noise is very harmful for the people and natural life of live organisms in that area. As we know high dB can cause permanent deafness if a person gets exposed to it for long period of time an of course periodically.

4)      The generated hazardous gasses from locomotive exhaust produced by incomplete or even complete fuel combustion, harms the nature and environment.
The world tries to find a solution to reduce the greenhouse gasses such as Carbon Di-Oxide, NH and HS group of gasses.

Gasoline is a source for all those mentioned gasses which are becoming the instant treatment for human life.
Running engine in such condition as explained in upper paragraphs, does not have better production than those harmful gasses.

5)      When the electrical components of locomotive air conditioner run with high frequency (430Hz), the armature core will tend to saturation.
This tendency to saturation has no better outcome than getting hot and in most of the cases failure due to fusion of the core.
The same will happen to mechanical parts such as frictional bearings of compressor crankshaft or other parts. The lifetime of parts significantly gets reduced.

These are some of the main areas that we would like to address them just to show the importance of the project that we have done.

When our client railway asked us for our urgent help, our engineering department immediately attacked the problem to find a permanent solution for it that can help the locomotive owners, environment and crews and people exposed to those locomotives.

Our engineering department developed a system that we call it “Alstom Frequency Stabilizer System” known as “AFSS”.

What we do with this system can be described as:

AFSS independence Alstom locomotive air conditioner system from frequency. In other word, no matter locomotive is in neutral situation and stopped or runs in highest notch, the air conditioner system will work with constant voltage which we have designed it for 50 VAC on purpose.

Also, the originally designed air conditioner system of Alstom works with just one choice. But in our design, we gave choice right to the crews between High – Medium – Low speeds in both applications of “Cooler” or “Heater”.

World Part Supplier Inc. provided the INTERCHANGEABILITY advantage for the maintenance team.
We consider that if our system, due to any known or unknown reason fails, the maintainer will have the superiority to immediately change the system to the old version and run air conditioner on frequency base.

This interchangeability is an additional profit of our system that admires the operators and owners of the system. It means that air conditioner will never stop operation unless for regular and scheduled maintenance programs.

AFSS provides different access for the administrator of the system to set up the goals based on the policy. Some of the data that can be administrated are:

  • Defining the set points for unit’s ON / OFF temperatures
  • Defining the maximum and minimum workable input voltage
  • Defining the compressor operation in percentage for High, Medium and Low cool (by rating the electromotor speed)
  • Event logger that provides list of errors (date, time, condition and number of repetitions, input voltage, output voltage, output current, atmosphere temperature, cabin temperature and operational mode)

Some major advantages that our system implements in Alstom air conditioner system can be briefly listed as:

1)      By making the air conditioner independent from frequency, we eliminated the requirement of engine high speed. It means that our system brightly and significantly reduces the fuel consumption to less than 50% of original design.
The economical calculation of fuel saving, shows a huge value that can be spent in other areas.

2)      Life-time of engine, alternator, air conditioner components and parts magically increase by using our system. The saving driven from this fact can be for other means.

3)      By eliminating the best performance of air conditioner under the engine high speed circumference, we controlled and reduced the production of harmful HS, NH and CO group gasses to the atmosphere

4)      By the system designed and manufactured by World Part Supplier, air conditioner will run with its best operational performance even when locomotive is in neutral position. It means that when locomotive or train is stopped in the station, the generated noise by engine significantly gets reduced and dB of the noise returns to the acceptable range. It saves the health of all live organism and human

5)      We provided variety of choices for the user comparing to the original design

6)      Interchangeability is an unavoidable privilege that nobody can ignore it

7)      Smart control of system and intelligent correction is the opportunity that original system never had it.

For more information, please do not hesitate to contact World Part Supplier by or any other social means that we have.




#WPSupplier #Locomotive #Airconditioner