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arber333 · 12-10-2016, 06:37 PM

I have prepared inverter for motor start.
First i wired everything like it should be, tyco contactor and all, then i checked. It seems i always make mistake at wiring pedal... I have that written down now.
Well then i setup my laptop and realterm and tried to start with 13V from my battery.
System ran but tyco made rattling noise when starting. It stopped if i brought clear GND to it. It seems path trough small relay on PCB is not as it seems. I checked and on PCB there are two zener diodes clamping from +12 to GND. When tyco starts it seems to put out a spike that zener pulls to gnd... and then releases. Paul why are there zeners? There are no chips there to protect. Well i put another relay in there and tyco clamped good, so that is solved now.
I got good comms with dsPIC30 and i tried to set some parameters, so far good.

I tried to turn shaft by hand (more like with a wrench) and A and B signals were from 4.9V to GND, but i am not sure of Z signal all i got was near GND that changed a little when i spun shaft trough some position. Will see about that.

I connected phase cables and prepared DC cables. Tomorrow i will bring 40V worth of battery from my car to try spinning motor. Now is allmost midnight here...

Some photos

12-10-2016, 06:37 PM	#2929 (permalink)
arber333 EcoModding Lurker Join Date: Jul 2011 Location: Slovenia Posts: 70 Thanks: 0 Thanked 20 Times in 13 Posts	Inverter set I have prepared inverter for motor start. First i wired everything like it should be, tyco contactor and all, then i checked. It seems i always make mistake at wiring pedal... I have that written down now. Well then i setup my laptop and realterm and tried to start with 13V from my battery. System ran but tyco made rattling noise when starting. It stopped if i brought clear GND to it. It seems path trough small relay on PCB is not as it seems. I checked and on PCB there are two zener diodes clamping from +12 to GND. When tyco starts it seems to put out a spike that zener pulls to gnd... and then releases. Paul why are there zeners? There are no chips there to protect. Well i put another relay in there and tyco clamped good, so that is solved now. I got good comms with dsPIC30 and i tried to set some parameters, so far good. I tried to turn shaft by hand (more like with a wrench) and A and B signals were from 4.9V to GND, but i am not sure of Z signal all i got was near GND that changed a little when i spun shaft trough some position. Will see about that. I connected phase cables and prepared DC cables. Tomorrow i will bring 40V worth of battery from my car to try spinning motor. Now is allmost midnight here... Some photos Attached Thumbnails