Hi guys
I have posted this over on the energeticforum too. But, this forum seems ju st as active
I have recently finished builing a FEG. I seem to be missing something because although it runs not very smoothly - it is hunting, waiting for the next battery pulse - it does run but slowly drains the battery.Also, it is a bit noisy, that is, it has a high vibration sound.
I am uploading a few pics of the scope output and the actual machine and would appreciate any comments from anyone who may also have dabbled with this project.
I have built the magnets into the flywheel. Machining costs are not cheap. My first FEG attempt kept bouncing off the bench because it was running unbalanced. With the machined parts my FEG runs smoothly, limited bounce. I have used 8 coils with 8 N35 40x20x5 neodymium magnets. The coils are as specified in John Bedini's book. 250 turns .8mm wire My first attempt with older ceramic magnets did not give a very strong output. The scope is showing about 60 volts (20 volt scale) through the diode into the capacitor. Two photos, after discharge - lower voltage and charging 50 volts. When running I have disconnected the pulse follow through charging as it seems to make little difference. However, my caps will only charge up to 32 volts over a period of about 1 second. Thus, I am limited to the size of capacitance. 10000uf is about the maximum at the moment. My run capacitors are a total 13uf for wave smoothing. The time base for the scope is 2ms. The voltage scale is 20 volts. Without a tachometer I am roughing the speed at around 620 RPM. The diameter of the flywheel is 295mm. I have eight coils and eight magnets.
I am using the basic circuit of John Bedini, which I think is supposed to theoretically charge the battery with positive BEMF pulses. That said I have used a Hall sensor to define the changeover of flux through the coil but cannot seem to locate the actual point of pivoting to selectively collect the peak BEMF which should maximise the output to the cap. So I am thinking that I am maybe introducing some negative influence into the capacitor charge that is reducing the effectiveness of the charge prior to discharge into the battery. Result, my circuit needs some development!
It has taken a bit of time to put this FEG together so I am hopeful of getting it to run with the excess output as suggested by John Bedini in his book. Also, to run it a bit quieter. Happy wife, happy life!!
cheers
Dwane
I have posted this over on the energeticforum too. But, this forum seems ju st as active
I have recently finished builing a FEG. I seem to be missing something because although it runs not very smoothly - it is hunting, waiting for the next battery pulse - it does run but slowly drains the battery.Also, it is a bit noisy, that is, it has a high vibration sound.
I am uploading a few pics of the scope output and the actual machine and would appreciate any comments from anyone who may also have dabbled with this project.
I have built the magnets into the flywheel. Machining costs are not cheap. My first FEG attempt kept bouncing off the bench because it was running unbalanced. With the machined parts my FEG runs smoothly, limited bounce. I have used 8 coils with 8 N35 40x20x5 neodymium magnets. The coils are as specified in John Bedini's book. 250 turns .8mm wire My first attempt with older ceramic magnets did not give a very strong output. The scope is showing about 60 volts (20 volt scale) through the diode into the capacitor. Two photos, after discharge - lower voltage and charging 50 volts. When running I have disconnected the pulse follow through charging as it seems to make little difference. However, my caps will only charge up to 32 volts over a period of about 1 second. Thus, I am limited to the size of capacitance. 10000uf is about the maximum at the moment. My run capacitors are a total 13uf for wave smoothing. The time base for the scope is 2ms. The voltage scale is 20 volts. Without a tachometer I am roughing the speed at around 620 RPM. The diameter of the flywheel is 295mm. I have eight coils and eight magnets.
I am using the basic circuit of John Bedini, which I think is supposed to theoretically charge the battery with positive BEMF pulses. That said I have used a Hall sensor to define the changeover of flux through the coil but cannot seem to locate the actual point of pivoting to selectively collect the peak BEMF which should maximise the output to the cap. So I am thinking that I am maybe introducing some negative influence into the capacitor charge that is reducing the effectiveness of the charge prior to discharge into the battery. Result, my circuit needs some development!
It has taken a bit of time to put this FEG together so I am hopeful of getting it to run with the excess output as suggested by John Bedini in his book. Also, to run it a bit quieter. Happy wife, happy life!!
cheers
Dwane
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