Hi, is it possible to have a transistor configuration to oscillate Vgs?
When point A is enabled the voltage at point X will be 2 times the battery voltage.
MOSFET source is always at the plus value of the battery voltage and is consider ground with respect to Vgs.
The MOSFET requires 10 volts at the gate to turn on.
Use a resistive voltage divider to create a high and low side of the voltage at point X.
Configure a transistor circuit on the high side of the voltage divider to provide 10 volts to gate.
I do not have a lot of experience with transistor circuits, comments are welcome.
high side, low side, I am starting to understand, still learning spice software.
Lets find renewable solutions to reduce energy cost
Hi, The RC timing constant at the voltage multiplier output is not allowing a pulsed output. The output of the voltage multiplier has 1.5 volt ripple riding at 20 volts and is not discharging to zero, so the MOSFET will never turn off. I am searching for alternatives. Ordering a gate driver is the obvious solution. Comments welcome.
The new used oscilloscope arrived and I spent the few days trying to get the nand gate oscillator to oscillate and show the output wave form on the O-scope. Step one complete, next is the voltage multiplier. I will post updates when available.
Hi, thank you for the help. Spinning the PMA by hand I am to confirm that the PMA does produce a sine wave output.
Connect the ground clip to one phase, and the probe to another phase. With a scope always start on a lower gain setting than you expect to need, and then work up. If you have the gain too high and the voltage at the input is higher than expected you can burn out the input amp.
Hi, the new used oscilloscope arrived. It displays the calibration wave form on each channel. What connections are needed to view the AC output of the PMA?
Hi, this is a circuit for a dump load controller that drive a MOSFET. I have contacted Ghurd. It may solve some of the problem with turning on the MOSFET.
If you are going to cut a board, then you should consider some of the SMT FETs. You won't have to drill so many holes, and some of them are very nice. (200V VDS, turn on with a 4v VGS, 33 amps!)
Hi, circuit board for MOSFET modules. This will allow for paralleling and will function as a heat sink. The will also allow from binding posts to be mounted for easier connections. I should be able to use CNC router for fabrication. After looking at the Radio shack data sheet it looks like continuous I out is 4 amps. Once the basic test is working I can add more modules, then the only real concern will be dealing with control circuit fan out.
GoVertical wrote:Hi, it is to early 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
Hi, it is to early 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
It's probably much more dangerous to your screw driver than it is to you.
The energy in the cap is 1/2CV^2 or for your cap .5*7200E-6*50^2 = 9 jouls
A watt is a joul per second, so if you cranked on the alt with only one watt for 9 seconds you could charge that cap.
But when you shorted it, it discharged in about 1/100000th of a second. So the power was 9 / (1/100000) = or about 900000 watts! luckily it only lasted for 1/100000th second. :-)