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| How to control brushless DC motor speed with my ESC? |
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| drummerdimitri:
So I've bought a brushless DC motor with it's ESC but I have no idea how to control the speed of the motor as the pin-out of the 3 wire cable coming out of the ESC is not mentioned anywhere. I bought a e-bike throttle to mount to my bike as I would like to turn it into an electric one but it does nothing. Can't even get the motor to run. So what is needed to get this thing going :-// |
| maginnovision:
Probably power ground and signal which will probably just be PWM. Pictures, model #'s? |
| Benta:
Pics and more information, please. This is far too vague. |
| drummerdimitri:
--- Quote from: maginnovision on December 12, 2018, 10:35:08 pm ---Probably power ground and signal which will probably just be PWM. Pictures, model #'s? --- End quote --- Sure, here's the link to the ESC/Motor combo: https://www.aliexpress.com/item/HIINST-Waterproof-B3650-4300KV-Brushless-Motor-w-60A-ESC-Combo-Set-for-1-10-RC-Car/32915974680.html?spm=a2g0s.12269583.0.0.2c407ae1RcyE9P And this one is for the throttle control: https://www.aliexpress.com/item/Passion-Ebike-36V-48V-72V-Electric-Bike-Thumb-Throttle-Throttle-Speed-Throttle-bicycle-Parts/32476370166.html?spm=a2g0s.12269583.0.0.22913c8beZfUmQ I don't have a remote control receiver so not sure how to make this work. |
| kurt:
As it looks like a regular RC ESC it probably expect a standard RC-servo signal. Which is a PWM signal encoding position command (or throttle command in your case). The standard encoding is pulses spaced ~20mS apart where a ~1mS pulse is 0%, 1.5mS (or actually 1540uS IIRC) is center/50% and ~2mS is 100%. Old analog servos would burn out if pulsed faster than the standard ~50Hz, but digital servos and ESCs normally can handle higher frequencies as long as there is some space between the pulses. 330Hz seems to be a pretty standard refresh rate these days (gives faster response and tighter control loop when gyros for flight control, or governors for RPM control are involved). |
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