Search results

I feel that the rotor exploded under the centrifugal force. I am a mechanical engineer then I have a good amont of intuition about this kind of things. I was very slowly increasing the throttle, it's not a suddend command change. Externally, the motor looks perfect, but it's jammed. I will way...

Yes, It worked. But it worked so well that my motor snapped and jumped out of the table. It's completely jammed and useless. Something exploded inside. Hobbyking told me that it was able to reach 58000 rpm, but this is bulshit. I was not at even at 1/3 the throttle for just a few seconds. This...

Thanks. My ESC is a HV. As I said on previous post, I don't have a receiver. I send a servo command from an arduino. I also ordered a servo tester but will not receive it before a while. Do you mean that the ESC needs to received a 5 V on the center pin?

A 0 thr input is just a 1 ms pulse width or close. I will try to simulate that signal before to power the ESC. I will see if it works.

I already seen this video. It does not help. I don't have a receiver. I need to know to complete logic the ESC is using to operate. My ESC does not have a BEC. Do I need to send a 5 V on the center pin?

What does it mean? My application is not RC. I will never hook it to a receiver. I want to control it with an Arduino.

Hi, I bought a YEP 120A ESC for my project. This thing comes with no instruction at all and I have found nothing on the net neither. This is kind of bizarre to say the least. I have not received yet the programming card because it was back order. I wanted to connect things together just to see...

I have found this equation: C = 1/[1-((T-25)*0.00393))] Not sure it's reliable. It would need that for a 50°C temperature increase the resistance increases only by 24%. Still rather low. I don't know how much hot these motor can run.

Thanks for all these quick replies. I suppose there might be an approximate rule of thumb on this like a multiplying factor. I would not be surprised that the hot resistance be at least 50% higher. I am actually not even sure if the rated resistance is cold. Still need to search.

Hi, Another question for you. When a given motor has a specified stator resistance of 17 mOhm for example, this is cold (no load). How do we know the resistance at maximum temperature? (full load) It must be higher. I suppose that a hot motor maximum speed will be lower than when cold.

Thanks, but your answer sound confusing to me. Using 100% just mean the "no load" rpm you will get. That's the definition of kv. That theoreical speed is useless, since as soon as you increase the current (load) a voltage drop in the motor will occur and the real max speed you get is lower. In...

Hi, This is an old thread but in-line with my questions. I did not received clear answers on my post in the ESC category. The actual speed depends on the load and on the motor resistance as well. Is the 0.8 rule always good enough? Is there a more accurate calculation? If you can't find the...

"The ESC's we use in RC don't have an off switch" This is kind of weird in my mind. A industrial motor and drive is never disconnected. OK but what happend when you are in line waiting to lift a plane with battery connected? Does the ESC draw power from the battery and how much? Does the...

Hi, Thank you for your reply. My questions are for general understanding and may actually apply to any RC project as well. Don't stick too much to my numbers. This one would be a kind of portable high air speed blower. I cannot tell you more here. I could also build a kart and the same...

Hi, I am new to RC. I don't have any yet. I am an engineer interested in the matter. Regards! Serge

Hi, I am new to RC with limited knowledge. I have a background engineering knowledge in the industrial side. RC is very different and special. I have searched and read a lot right and left but cannot find clear answers to my questions. I need help to select and match batteries with ESC and...