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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Mike Scholtes on October 07, 2013, 11:12:51 PM

Title: Significance of PWM settings?
Post by: Mike Scholtes on October 07, 2013, 11:12:51 PM

When programming my Phoenix 45 I noted a PWM setting called "outrunner" in addition to the 8, 12 etc khz setting choices. Should this be selected when using an outrunner? Motor is 750KV, 14 pole OS, 5C batteries, Hubin FM9 timer.

Also, I notice a wide variety of PWM settings in the setups being posted here, even for similar motors with the same number of poles and similar KV. What does it matter how often the pulse is sent to the motor?

Title: Re: Significance of PWM settings?
Post by: Crist Rigotti on October 08, 2013, 06:17:42 AM

Deleted.

Title: Re: Significance of PWM settings?
Post by: Dean Pappas on October 09, 2013, 08:18:25 PM

Hello Mike,
I would not suggest using the "outrunner" setting. Just use the PWM and advance that is recommended for your motor.
Also, ask around here or look at the "list your setup" thread for folks that have used the same motor to see what PWM frequency and advance they used.
There is no arguing with success.
The outrunner setting from most all manufacturers is an attempt to do a one size fits all, and we know that this just isn't true.

Regards,
Dean P.

Title: Re: Significance of PWM settings?
Post by: Mike Scholtes on October 09, 2013, 09:22:38 PM

Thanks Dean. Norm gave me the same advice in a PM, suggested using 8khz for cooler running. I don't see anyone else reporting using the OS 3825 750KV motor. The info sheet says it is a 14 pole 12 turn motor. Guess I can be the first to report after this Sunday. Using either ICE 50 or Phoenix 45 with Hubin FM9 timer, 5s 3000mah batteries. Nice motor with cooling fan on front like Plettys.