ElectroSaver - Energy Saving Motor Controller 4

[ottoboxer]

Has anyone any experience of the ElectroSaver - Energy Saving Motor Controller.

There has been discussions in the Forum regarding the PowerBoss. Are they practically the same?

Otto

 

[dpc]

Probably. None of these devices live up to the hype. Always keep the three laws of thermodynamics in mind:

1. You can't win
2. You can't break even
3. You can't get out of the game

If any product/device appears to violate one of those three concepts - it's bogus.

 

[jraef]

dpc,
That is probably the best interpretation of thermodynamics I have heard. It actually can be applied to many issues, not just physics, politics being the most noteable. Thanks for that.

ottoboxer,
The only refernce I saw for Electrosaver (that was not a consumer electronics buying service) was someone in the UK selling it in a way similar to the PowerBoss and their ilk. From the decription it appears to be the same old snake-oil.



"Venditori de oleum-vipera non vigere excordis populi"

 

[jbartos]

Suggestion: Visit

http://www.save-energy.org/electric_motors.htm

for:
Over the years we have had opportunity to evaluate them all - they should all be avoided. Our experience is that only one retro-fit control other than a VSD has any useful effect at all - the electrosaver.

 

[aolalde]

The only way to save energy in a process is by improving the efficiency. The limit is a perfect device with 100% efficiency; from there energy cannot be created from nothing.

 

[jbartos]

Comment: Fortunately, there is some room to improve the motor efficiency, which varies with the motor operating conditions and requirements. Motor manufacturers tend to have their product to be most efficient when the motor operates at rated nameplate values. Some applications allows such motor operations, others do not. Therefore, the offered energy saving hardware can save electrical energy in some motor operating conditions where the motor operates with less than motor nameplate efficiency value.

 

[busbar]

Marke is a regular contributor to Eng-Tips.com. He also has some work posted on the general subject at:

http://www.lmphotonics.com/energy.htm

A basic assertion he reiterates is, “Only energy that is being wasted, can be saved.”

 

[ottoboxer]

Thanks to all for the info. Busbar I did get a copy of T M Empson's report which I found quite useful. Still not sure but maybe have to give them a trial.

Otto

 

[Marke]

Hello ottoboxer

The three points to note with this tyoe of technology are: "you can only save a portion of the energy that is being wasted", "larger motors are much more efficient than very small motors" and "the maximum energy that can be saved is when the motor is operating under open shaft conditions".

In other words, if you want to achieve worthwhile results, select motor that are small and operate for a considerable period of time under very light load conditions such as punch presses. Do not bother with motors such as pumps and compressors even when operating at half load.

The old claim that oversized motors waste energy is not true except in extreme cases or very small machines.

The best way to find out is to try and see. Base all measurments on proper KWHr metering. Do not measure volts and amps and calculate. This only works for continuous sinewaves.

Report back on your findings.

Best regards,

Mark Empson

http://www.lmphotonics.com