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ESC PWM Frequency

Posted by ArvindD on August 18, 2015 at 1:33pm

Hi Guys,

I am using a BeagleBoneBlack to generate PWM signals for an ESC. I am using an Afro multirotor ESC 20A. I am confused with the PWM frequency.

The link below is the manual for this model.

http://www.hobbyking.com/hobbyking/store/uploads/214281780X260742X20.pdf

In default setting, it is mentioned "for PWM motor stop/arm below 1060us and full power at 1860us." Further more in the hobbyking website,

http://www.hobbyking.com/hobbyking/store/__43709__Afro_ESC_20Amp_Multi_rotor_Motor_Speed_Controller_SimonK_Firmware_.html

it mentions input 1kHz. Now I am confused because 1kHz is 1000us. This would not even start the motor.

Also in the manual->general operations section it is mentioned default PWM frequeyncy is 18kHz with 800 steps. Again 18kHz is 55us.

What am i doing wrong here?

Thanks guys

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Replies

Liu heng September 23, 2015 at 9:37pm

This is right for brushless motor esc :"for PWM motor stop/arm below 1060us and full power at 1860us". but sometimes it not very accurate,you can do a calibration first.

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