At 8:40 PM -0800 14/2/05, Rob Linschoten wrote: >I am running a small (300W) crossflow turbine using a 1 hp 240V 3 >phase Hyundai TEFC motor wired 1C-2C (about 800 feet from the >battery, then stepped down to 60VDC via a toroid transformer, >rectifier assembly and about 24,000MF of capacitance) and into an >Outback MX60 MPPT controller to charge a 48VDC bank. Works like a >charm. The MX60 finds the sweet spot for the turbine at any given >head/load. I have a diverter on the 240VAC side set to 260VAC in >case the MX60 "lets go" during the float cycle.
This sounds very expensive? What sort of efficiency are you getting, do you know? Many people also use the MX60 as a step down converter so as to get high line voltage (max 140V). But this makes more sense for lower voltage batteries. In your case it appears to be used purely for speed matching. This could more cheaply be achieved by tweaking the C-2C capacitor sizes when you alter the flow (or for gross changes in battery voltage), if it seems worth it. You can usually find a good all round value for the capacitance (and hence speed) to suit all flows and loads, if the pipe and wires are big enough. -- Hugh http://www.scoraigwind.co.uk/ ------------------------ 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/
