HobbyWing 50a V3 question

[DOG]

On the Hobbywing esc the default is fine but when it comes to finding PWM and the timing of a motor, is there some formula to figure it out. Thanks in advance!

[pvolcko]

There is, but it ballpark kind of results. I do not know it off hand. You're better off searching the internet forums for what others with the motor (and ESC if possible) have posted they use. You can also play around with the values yourself. When doing this kind of experimentation always only change one thing at a time and test it out.

In general:

You will absolutely need a IR thermometer "gun" to take temperature readings from the ESC and motor can very shortly after touchdown. You cannot wait more than a few seconds before the heat in the core of the motor dumps to the can and ruins the readings. If the ESC has data logging capability and tracks ESC temperature then you can get away with using that information for your post-flight checks.

PWM: The higher the value the hotter your ESC is going to get because it is switching the FETs more frequently which is where they generate the heat, aside from simple resistance based heat build up which will remain the same regardless of this setting. Some motors do not respond well to timing above 12khz or below 8khz. This is also highly dependent on the ESC's control software, so you may find that on one ESC type a given setting will work great for a motor, but on another ESC type the same setting will not work well. Trial and error is the best way to go here.

Timing: Higher advance timing will end up dumping greater power into the motor, trying to goose it earlier and earlier in the phase timing cycle. So your motor and ESC may heat up if you increase this from default settings. On the flip side, lower advance timing will put less power into the motor so it should run cooler. Some motors and setups benefit from higher advance timing. Lower timing can be useful on motors that run hot normally to help cool them down.

[DOG]

That's awesome Paul. Thanks for that information, I appreciated. Yeah that Trial and error part....... I had a funny feeling you might say that. That cool. Something else to learn. The Default PWM is @ 32khz? My motor says 10khz, I question that, the timing is 15 degrees for default. I'll research some more but your information helps me out.

[pvolcko]

The pwm settings I mentioned were from castle escs I've used. Your hobbywing may well have different values.

[DOG]

Hey there Paul. I found a formula for PMW that someone else can benefit from this. The formula Is: Kv x volts x poles/ 20 and that will get you close to the PMW you will need. I hope this help. It help me.

[Graham Lawrie]

Bit late reading the thread:( i could have given you the same formula:)