At 3:32 PM -0600 12/2/05, Nando wrote:
>Just because you have tried 3 times with induction motors and failed to get >the proper results you are FOUL MOUTHING the Hundreds or even several >thousands small hydro systems using induction motors as generators. Low >cost, Long Lasting, Easy to implement, Easy to control and maintain. I am sorry, I had no intention of being foul in any way. I intended to be helpful. If you know of a successful example using an induction generator and a transformer/rectifier, please could you tell me the efficiency? and suggest where I may have gone wrong? My turbines were not stalling, and I experimented plenty with the excitation but could never get any of them producing more than half what they should. This is also typical of other systems of this sort that I have heard of. I have had great success using induction motors (with controlled AC output) feeding synchronising sine wave inverters, but then I have the extra cost of the controller. I have had great success with high voltage permanent magnet machines and transformers. Hydro power is very easy compared to windpower. But induction motors and transformer/rectifier battery chargers are not so easy at all. A heavy cable is often cheaper and more efficient than a transformer, so I thought I ought to mention that fact. I also mentioned that he could use either a stream engine or a multi-jet pelton on that site and either would work well. Everything I said seems to have got right up your nose. I seem to have upset you, Nando and for that I am most sorry. If I have upset anyone else then I am sorry for that too. I only tried to be helpful by relating my own experiences, but in future I will probably not risk it. best wishes, and bye bye. -- Hugh ------------------------ Yahoo! Groups Sponsor --------------------~--> What would our lives be like without music, dance, and theater? Donate or volunteer in the arts today at Network for Good! http://us.click.yahoo.com/TzSHvD/SOnJAA/79vVAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
