Vphase units

[UNG]

Can I ask what theory this V phase unit works on? All of the other theories relating to current, voltage, frequency and phase angle have been covered. But what does this unit do?

Answers on a post card please or is it that the answer could be put on a postage stamp

 

[Marvo]

Sorry Marvo, but a motors output at the shaft is governed by the load. Lower the voltage and the current goes up. Your bucket full of water requires the same power to fill it no matter which way you supply it. If the pump speed is varied efficiency is altered. So I’m afraid pumps are not a good example, not many small motors are.

Lol, please don't appologise, you're theory is spot on, I was just trying to avoid getting too deep into motor theory. The theory that low voltage is detrimental only applies once you're no longer running the motor in full flux saturation. My theory was that this wouldn't be the case if the motor was developed to run on EU supply.

As pointed out if the voltage decreases below a certain point it would result in lower flux and therefore loss in torque leading to high slip or stall and overload. Where I was thinking is that if the motor is designed to operate on EU voltages then it would still run in full saturation at a voltage that's 'optimised' from 247 to 220v and possibly a little lower. In actual fact it would be slightly oversaturated at UK voltages with some I²R losses. If this were the case then there would be an energy saving.

Yeah yeah I know I'm flogging a dead horse, the more look at this the more it looks like savings would be marginal and many of them might be at the expense of something else. The reason I'm not opposed to the general theory behind it is I've experienced voltage optimization setups in the industrial sector and there are large energy savings to be had same as there is with power factor correction. I can see there could be some savings to be had but I agree it would need to be specified on a case by case basis.

 

[malcolmsanford]

Marvo I'm sure SA is the same when your in a hole you can't get out of the last thing you need is a .......shovel lol

 

[Marvo]

Aww c'mon,:rofl: I'm not writing anything off...even snake oil as somebody called it.... without exploring it fully. You're right though, I'm just about at the stage where I'm playing devils advocate on this one. We can't even use the optimisers here cause our voltage is 220v on a good day, usually nearer 200 in peak periods.

 

[Marvo]

This artical made an interesting read. http://itee.uq.edu.au/~aupec/aupec04/papers/PaperID77.pdf

Does anyone know if the results of the Ofgem Scottish Energy Trials have been released yet? Link

 

[Knobhead]

I hate to point this out Marvo but a quick glance at the first paper covers RAISING the voltage in Australia.

Sorry again :rofl:

 

[Big n Daft]

Good lord, you lot still at it.

 

[Marvo]

I hate to point this out Marvo but a quick glance at the first paper covers RAISING the voltage in Australia.

Sorry again :rofl:

It's looking at the effects of operating domestic appliances at different voltages.

Good lord, you lot still at it.

I'm trying a new tactic now. If the thread runs long enough I'm hoping Tony will install one at his house and let us know how much he saves.

 

[Knobhead]

Marvo, I might be big (6' 2") but I'm not daft!

 

[topquark]

This artical made an interesting read. http://itee.uq.edu.au/~aupec/aupec04/papers/PaperID77.pdf

Does anyone know if the results of the Ofgem Scottish Energy Trials have been released yet? Link

Pretty much what you'd expect, even with upside down electrons

 

[Sam the man]

How about the VO4Home unit, that looks better but its £600!

 

[UNG]

Better than what!!. Can't be bothered to look. The only thing I see is a better rip off at £600 and an even longer payback

 

[Guest111]

Now here’s a strange twist, we’re now joined by Gordon0707. Zero posts, but a thanks to P Clark for his defence of the “snake oil” unit.

Has my mind become that nasty and suspicious?

NO,I told you that in our phone conversation did I not? your,e just turning into an old meldrew like me,btw you done anything about the meldrew lounge yet? lol

 

[Guest111]

Ha I,ve got it finally and you are all way off the mark,obviously the unit does bugger all worth laying out that kind of money for and the sole reason for its existance is as follows, A to make the manufacturer money and B to give us lot on here something to get heated over on a regular basis :teeth_smile:

 

[UNG]

and B to give us lot on here something to get heated over on a regular basis :teeth_smile:

So there are savings to be made we haven't even bought one but we get heated by it:biggrin::biggrin:!!