Electronics > Beginners
H-bridge doesnt supply any current.
Dmeads:
Hi folks!
I followed the Lewis Loflin H bridge tutorial for an SPWM signal which is great
I have included my schematic, but I used a square wave to simulate in LTspice instead of the SPWM switching.
also I used IRFZ24N instead of IRFZ44N MOSFETs.
I get a nice sinusoidal output with a high resistance RC filter, but no matter what load i stick on the bridge, my power supply says the H bridge never draws more than 1mA, which from simulation I learned is for the 10kohm pullup resistors with a 10V supply voltage.
Does anyone know how my H bridge can output more current? I would eventually like to use it to drive an induction motor.
Thanks!
james_s:
Your circuit is not the same. One has all N channel mosfets, the other has N and P channel mosfets, at least it looks that way from the picture.
garethw:
You’re trying to turn on an N-channel mosfet by grounding it and that will not work. You can’t swap p and n channel devices without reconfiguring the circuit.
Sent from my iPhone using Tapatalk
Mechatrommer:
if you do that in real life, you will burn all the mosfets.
mc172:
--- Quote from: Mechatrommer on September 08, 2019, 09:51:44 pm ---if you do that in real life, you will burn all the mosfets.
--- End quote ---
Well that's a great help to the OP, nice one for helping him to understand why. :palm:
Navigation
[0] Message Index
[#] Next page
Go to full version