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
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...
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...
Opinions please:
Should the Groundless controllers be regarded as "Ideal" when they switch off the MosFET every few 65mS to recharge the capacitor ?
I bought some modules, intending to use them for alternator rectifiers, but with AC power going into them, they don't work much better than a...
Hi. I am looking for an AVR for a 3-phase brushed alternator/generator. Are AVRs for brushless units similar, just without the rectifier ? If I added a rectifier to a brushless type, would it work with a brushed system ? What is the difference between an AVR for a single-phase and a 3-phase...
Being new to industrial computing, I hope some can advise me on configuration rather than board specifics.
An SBC, with PCIe edge-connector, and a multi-slot PCIe backplane: Is the computer limited in how many PCIe slots it can talk to ? What are the limiting factors for communication with the...
Hi, and apologies if this question has been answered before:
Small generators, some use a capacitor and auxiliary stator winding to energise the rotor, some use an auxiliary coil and electronic regulator via brushes, some take power from the main windings, with electronic regulation via brushes...
Does anyone know if there is a fluid or gel that is relatively transparent to IR/cutting laser light ?
Obviously, water isn't ! I am only thinking of a few cm, but want it to be as energy efficient as possible.
Hi all. I haven't been able to find a thread that this fits in so:
What material has the highest reluctance to magnetic fields ? Is air the best there is, or otherwise ?
Another question that does, I think, belong here: In a PMA, can anyone confirm that alternating radially polarised magnets...
Hi. Another off-beat question. Can anyone recommend a material, probably a liquid (acid or base ?), which will effectively remove oxide from a heavy stranded cable. Soldering flux is not an option, as the cable is about 100mm^2/.15in^2, stranded. It is also rubber insulated, so heating is...
Hi. I have been looking for a multi-phase (3 or 4) controller for a DC-DC application, which has SPI, I2C, or other serial interface so that I can control the duty cycle (PWM) and read back outpt voltage and current. I need the supply voltage to be 18-40v (with different inductors for the...
Can anyone advise my on the basics of using cutting/burning lasers up to the 1kW region ?
Can slab lasers be used directly, or would I need a pumped unit ?
What is involved in driving/controlling/cooling such a device ? I am not particularly interested in control better than about +/-5%, or...
Hi. Has anyone come across a chemical treatment to dissolve/convert the oxide layer so as to improve electrical conductivity between the heatsink and cooled device ? I found a product some years ago, but can't find it now.
Hi all. Has anyone any idea what would have caused this damage to a magnetron ? It obviously needs replacing, but my curiosity requires a cause.http://files.engineering.com/getfile.aspx?folder=9cfc0353-5b9a-45cb-8087-3a5aa1552b17&file=magnetron.jpg
Hi. Is there an easy calculation from voltage, & inductance to maximum power transfer ? I had expected to use a 500kHz converter with an 18V supply, but that won't allow the power that I need. I would need either to crank up the voltage, reduce the frequency, or use multiple phases. A lower...
