Noise From The "off Grid" Heaters

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rnevillesmith

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I am a newcomer to wind turbines but have had one installed. The turbine is a 6kW Kingspam and the inverter is Power-One. I have the excess power wired to 3 low power Dimplex heaters which is fine except when powered they emit a a high frequency noise (for those with good hearing) although I can only just hear a lower frequency noise at approx 50 cps. A previous cheap convector heater did not make this noise. I am puzzled about the cause - is it because the inverter produces "spiky" AC. Has anyone experienced similar problems and any solutions offered? 

 
It sounds like it's a generator with an inverter and what you are hearing is the high frequency switching.

Try a mains EMC filter, or even a big transformer to filter out the high frequency component.

 
Hi there, It is because all this solar and wind power stuff is a load of cheap useless junk and pollutes the power supply that the rest of use have to use. The generation of electicity, like so many other things, is best left to specialists like the CEGB. or whatever it is the the chinese or the french have decided to call what remains of this public utility, stolen from the people of britain by the tories to make their city friends richer...

Two questions;

1, Anyone notice the quality of power getting better??

2, Anyone noticed it getting cheaper??

Thought not....

So There!!!!!

john...

 
Power One is part of ABB group, not famous for being cheap sh1te. It converts from dc to ac using high frequency galvanic isolation. Power one used to have a function whereby you could re-set the frequency it operates at to gain a slight increase in efficiency, they are normally set to a range which is inaudible. If the inverter is somewhere you are unlikey to hear it, changing this setting will change the frequency of operation, which may solve your heater issue. I tried this on my own inverter and could hardly hear it from 2 feet away.

 
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