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Old Dec 30, 2012, 07:35 PM
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United States, MI, Ann Arbor
Joined Aug 2011
895 Posts
Quote:
Originally Posted by Fourdan View Post
Hi
Yes I observed some variations of Kv depending of the ESC
** Brand
** Timing
Also it happens that some ESC are not starting well if voltage is too low.
After starting-running some ESC could go down in voltage or PWM to some
low speed limit.
SLS ESC are very good to go low speed (FOC algorithms with a lot of DSP)
Louis
Thank you Louis. Though this is a bit off the topic, but do you have any idea how servo motor driver can make the 3-phase motor running at constant torque even at low speed, while when using RC ESC, when reducing the speed by turning down the throttle, the torque is also reduced. Is this due to the difference in design of the 2 types of brushless driver?

Also, is this why high speed motor + gear can be a good combination, cause this gearing system kind of "reduce' the effect of reduced torque when turning down the throttle. Is this why high speed motor + gear may have better acceleration than using low speed motor for direct drive?

Thanks
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