gwhy!1
100 kW
Thud said:you had a false positive.
& now you have a good set up.
Yep, false positive.... Glad you now have it sorted.
Thud said:you had a false positive.
& now you have a good set up.
eDahon said:So if the sensors are placed at 120 degrees internally on a delta wound motor an i reterminate the motor in wye without changing the hall sensor position? Or will the timining be off in wye configuration?
marcexec said:Seems to work fine on mine (see my thread, currenly dialing the 80-100 in).
Have internal halls and the motor runs so much smoother once the 120° fixed spacing kicks in.
Dynamic advance gives another 1k rpm.
Semi-on-topic question:
given the same amount of batteries, 130kv (don't want to rewind yet) and saturation at about 8.5k rpm, would you rather go for 60V or 84V (limiting the speed in the controller)
(I can handle the gearing )
I did not find the ss41a but found ss41 and some others the ss41 is $2.20 and others are priced similarlygwhy! said:a good alternative hall sensor to the ss41a ( or any hall used in a motor )
SS460S SENSOR , They are a fair bit cheaper than the 41's ..
Arlo1 said:I did not find the ss41a but found ss41 and some others the ss41 is $2.20 and others are priced similarlygwhy! said:a good alternative hall sensor to the ss41a ( or any hall used in a motor )
SS460S SENSOR , They are a fair bit cheaper than the 41's ..
The ss460s is $1.31 each but I didn't think $3.00 would be a big deal per motor....
These things just get chucked on my orders once in a while because they are good to have in stock and there is nothing more frustrating than not having my motor running for a few days because $6.60 worth of ss41 sensors have failed during testing.....
dgrdan93 said:Just a couple of questions I hope someone here can answer
Recently I've been testing outrunners on a greentime 15 fet sensored/sensorless controller from aliexpress.com. I found that these work fine sensorless with a turnigy 8085 170kv at 6s to 8s lipo, but on 12s lipo it struggles to start up and easily loses sync under small load anywhere up to around 3000 rpm. I can understand the purpose of hall sensors during start up but at 3000rpm I would assume there is enough back emf so I don't understand why this is happening.
Should hall sensors eliminate this problem?
I have installed sensors to my motor but my controller only seems to use the sensors for a short period during start up then switches to sensorless mode once the motor is running, so I can't find out how the motor would behave with a sensored controller at higher rpm.
Also, do sensored controllers typically have higher erpm limits than sensorless ones?
The greentime controllers are only capable of 40k erpm which isn't quite enough for 12s lipo.
Thanks in advance.
Thanks for the replyIn sensorless mode all the "cheap" controllers tend to only be able to do 4.5krpm at most with your above motor.
how have you set up your sensors on your motor ? some controller are to clever for there own good and it may see that you have sensors and will only use them to startup or your sensors are not setup correctly so the motor gets to a speed that the signals from the halls are not matching up with the bmf from the motor so it drops back to sensorless some controllers that I have played with you just can not get around this problem so this may be the case with the greentime controllers, some controllers have a jumper link to turn on/off the sensorless mode. The only 100% reliable way is to have a sensored controller only , but that is not saying that all sensorless/sensored controllers will not work . The only thing I can suggest is to try and shift the hall timing a tiny bit.
the infineion controllers like cellman sells will do what you want.dgrdan93 said:Thanks for the replyIn sensorless mode all the "cheap" controllers tend to only be able to do 4.5krpm at most with your above motor.
how have you set up your sensors on your motor ? some controller are to clever for there own good and it may see that you have sensors and will only use them to startup or your sensors are not setup correctly so the motor gets to a speed that the signals from the halls are not matching up with the bmf from the motor so it drops back to sensorless some controllers that I have played with you just can not get around this problem so this may be the case with the greentime controllers, some controllers have a jumper link to turn on/off the sensorless mode. The only 100% reliable way is to have a sensored controller only , but that is not saying that all sensorless/sensored controllers will not work . The only thing I can suggest is to try and shift the hall timing a tiny bit.
I currently have my sensors mounted externally at 17.14 degrees apart with about 2mm of clearance from the motor. I haven't yet got a permanent hall sensor mount so I'm able to adjust them slightly and I can definitely notice how well they are placed by how clean the motor sounds.
I'll look at buying a sensored only controller but I'm not sure where to get one that's capable of higher rpm, and reverse like the greentime controllers.