Hi all. Is there a correlation between turns and output voltage at a particular frequency in alternators, or does it also depend on flux density through the coils ?
TIA.
Hi All. I have a relatively modern DSC9 where I have removed the electronic controls and attached a lever and pushrod to operate the power control.
Does anyone know:
1) If there is a TDC sensor ?
2) Does the #1 injector piezo sensor fire on needle lift and/or needle drop ?
3) What injector...
Hi. Does anyone know if there are available ball-valve inserts which can be dropped into a recess in a manifold. If so, what might they be called or where I might find them. I want some, probably 1 1/2" or 2" for a fuel fill and tank to tank transfer in a small ship.
TIA
Thanks for that.
Weight really isn't an issue. The vessel (ex-Minesweeper) was designed to be 116tons dry, 164 fully loaded. She is currently about 100tons. The British Navy removed about 15 tons of equipment when converted for training. I removed about another 4, then added about 5 in...
Hi all.
I am considering getting a prestressed reinforced concrete beam fabricated to stiffen the keel of a 100ft wooden boat. The proposal is a 16" x 8" or maybe 12 x 6 box section with 4 reinforcing rods, then filled with concrete. The concrete & rods would provide most of the stiffness...
Are pure-sine-wave inverters ALWAYS less efficient ? I am particularly interested in low or zero load efficiency. I suspect that, living off-grid, that I need a low-power PSW one for loads that need it or require it to be on all the time, and a heavier, NSW(non sine wave) one for occasional...
I think I will just microstep a geared motor for more than 60degree gauge. Less than 60 degrees just use a fixed voltage on one coil, then analog voltage on the other.
I am considering using just the fuselage, strakes and main spar, as I have them already built. Sea Sled hull, and possibly adding a high tailplane on twin-booms. Canard would be ineffective in GE. It would be a bit more interesting than just putting an outboard motor on it ! I have asked on...
Hi. Are there any tables or rules-of-thumb on the power reduction needed to fly in ground effect compared to above it ?
I built a Cozy, a derivative of the Rutan Long-Eze, but due to deteriorating health, I won't be allowed to fly it. I am considering adapting it to fly off water, in...
Hi. Can someone confirm that adjacent commutator segments SHOULDN'T read zero ohms ?
I just received a replacement armature for a small starter motor, and almost immediately noticed that the cuts to separate the segments don't look like they go all the way through the copper. I don't have a...
The other variety, ones which DO have a Gnd connection, work with a small forward voltage, the ones that I looked at has 30mV. What there response time is, I haven't determined. I presume there is a switched-capacitor converter to generate a decent Vgs.
I suspect that the ones I have are intended, and only suitable for, DC blocking diodes. The Bosch/Infineon ones are for car alternators and chargers i.e. low frequency rectifiers, and I haven't found any way of procuring a small quantity. I think they are only going to manufacturers in that...
IRstuff : exactly. Some controllers use 0v and supply V, and used a switched-capacitor circuit to derive the greater-than-Vin gate voltage. The ones that I have don't have a 0/negative connection, so have to switch off the FET in order to derive power from the 0.7V drop across the body diode...
First determine how much power you want to transfer, isolated or not, then input and output current/voltage ripple is acceptable.
That will determine switching frequency and thereafter the topology, core and capacitor sizes.
