Hi, it is to early to say how the completed circuit will affect the load experienced by the PMA. I am filled with a new zeal to complete the circuit and test. I often have a casual attitude when working on electronic projects, but after what I experienced today, WOW, I will be exercising more caution.
-- Edited by GoVertical on Saturday 14th of January 2012 10:29:30 PM
Lets find renewable solutions to reduce energy cost
Can you say DON,T TAZ ME BRO
Greetings, I tried a very basic experiment by hooking a 7200 MFD 50 VDC to the bridge rectifier and used the PMA to charge the capacitor. I was surprised how fast and how little effort was required to charge the capacitor to 50 VDC. I then discharged the capacitor using a piece of metal. This resulted in a very large spark and snap sound and the piece of metal had pitted scorch marks. I now have a new respect for the components I will be working with. Safety is a new priority for the project.
Hi, I received a recommendation to add a voltage comparator that would turn off the MOSFET when the input voltage is lower than the battery voltage. This will be the first circuit to determine what else will needed for the buck converter. I should be able measure input current and compare it to the output current. Because the controller circuit will be on a bread board it will be easy to make improvements after I have a working buck converter.
GoVertical wrote:It will take a few days to learn LTSpice maybe longer, but looks like it will be time well spent.
It will take a few days to learn LTSpice maybe longer, but looks like it will be time well spent.
Once you get started, it will go fast. If you need some help, I can post some example circuits.
Hi, it sounds like a good plan. I am shopping for a newer oscilloscope. Does anyone have any experience with the PC scopes?
GoVertical wrote:I do not know if the switch frequency has to be adjustable for the circuit to function at different wind speeds.
I do not know if the switch frequency has to be adjustable for the circuit to function at different wind speeds.
You could run simulations in LTSpice to see if it does what you want with a fixed frequency and duty cycle.
GoVertical wrote:Hi, project update. Waiting for ordered parts. I found a link that shows sensor to measure current if micro control is required.http://scienceshareware.com/how-to-measure-AC-DC-current-with-a-hall-effect-clamp-.htmI do not know if the switch frequency has to be adjustable for the circuit to function at different wind speeds.
Hi, project update. Waiting for ordered parts. I found a link that shows sensor to measure current if micro control is required.
I'm not sure how much those sensors cost, (they quote $50 - $500), but the Hall Effect sensors I used on my MPPT board were only $8.00 and they are good for 50 amps. I think that's a pretty good price. Digikey carries them.
Hi, I only know basic concepts. I am repeating the information from the article. If I make a false statement or conclusion please correct me. This really is a first attempt at this type of project. I am starting with a basic circuit with a fixed switching frequency and I will use a hand crank on the PMA at a fixed RPM and then try to measure a increase in current at the output when compared to the measured input current. This is all I am trying to achieve for now.