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To monitor the phases, I just use a bank of LEDs – which works just fine, and actually is more informative for what I’m doing that a dual channel scope. I just haven’t gotten to that datsheet yet. Spinner fishing for steelhead salmon and trout pdf At the time, the board was half the length of this board the MOSFETs were basically back to back with a slab of aluminum irfl4130 pull the heat away sandwiched between themand I went with a star point because it was easy to run the driver line to the return line because everything was so close.
The title is a bit deceiving, however, as the book focuses mainly on steelhead with comparatively less information pertaining to trout and salmon. Do you have a scope to check the signals to be sure?
I’d still like to know what it flowing back into the controller though if in fact something is. What am I missing? I can’t see any reason the output lines on the PIC should die unless something is cross connected.
Your point is well taken, and I think the ground loop is likely what’s causing me so much grief. Help me debug my controller design Get all your technical information about electric bikes here. I’d have expected the IRs to act as a buffer, but alas that doesn’t seem to be the case I should have mentioned OK, to take a step back and answer the questions datashwet earlier Do I have the right part? The plan right now is to make a few changes to my setup in it’s current configuration – because it is running at the momentand once I’ve got my parts chosen and firmware firmed up, I’m going to re-layout the entire board, with more emphasis on the grounding scheme.
Spinner fishing for steelhead salmon and trout pdf
Has anyone encountered anything like this before, or anyone have any insight as to what might be going on. I can’t see why anything should happen if all the FETs are inactive when you plug the motor in and stay that way as they should. I put in some diodes inline with the PIC outputs, and fired up the motor.
Thanks again for your help.
Datasheet Page , pdf datasheet & application note
If so, you are going to be disappointed with the torque from your controller. Prime Time Steelhead; Datasheett St. All books are in clear copy here, and all files are secure so don’t worry about it. We were having a yardsale last summer, and with 2 little kids in toe, and no big projects on the horizon, I decided to let go of my 20 MHz scope, and start looking out for a nicer one – digital storage type deal, Mhz or so. Any feedback would be appreciated!
Double check your layout.
Find three hefty resistors maybe around 10ohms or so, along with some good sized inductors to go with them around uH or soand use them instead of irgl4310 motor to do tests. Next, I plug in the IR, as shown in the schematic, and again it behaves as you’d expect. I’m thinking about adding in some diodes in between the PIC outputs and the IRs to block any reverse current. The only difference being that I’ve modified the driver stage to use the IR Mosfet drivers.
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After that, I plug in the MOSFET board, and apply 36V to it – but it isn’t plugged into the bike just yet, and it at this point, it seems that everything is still fine.
Up to that point, I had just been going with hand drawn schematics, and when posting the question, I wanted to have something a little nicer to refer to. Spinner fishing steelhead salmon trends: Everything works as expected in that when I’ve got my hall sensors plugged into the PIC microcontroller, the right control lines toggle at the output pins of the chip.
Make sure the bootstrap diodes aren’t blown. Now, I have NOT plugged the motor in yet. But in the meantime, I’ll be finishing up the design then the layout. Fishing spinners slow in river current causes the blade to pulse and throb sending an irresistible vibration to trout, steelhead and salmon.
IRFL4310 MOSFET. Datasheet pdf. Equivalent
You do not have the required permissions to view the files attached to this post. Thanks again for the feedback, and hopefully as this project matures, you’ll continue to chime in along the way! I’m actually in between oscilloscopes. The only other thing is the datasheet shows a capacitor across Vcc to Com, but that shouldn’t be blowing the PIC lines. Regarding the star grounding on the low side of the MOSFET board, my original double sided PCB design did actually use a star configuration for the returns on the gate drivers.
Last edited by wrobinson on Aug 09 2: Anyway, I’ve been making do with what I’ve got around the house for now. They are on my board, I just left them off the schematic for now, it’s a work in progress