Again, great video! I know how difficult it can be to explain these concepts in "plain English" and enjoyed your presentation. Good luck growing your channel!
I have a bit of trouble finding anyone to ask these so i hope you see this. Why do we have to use cylindrical wires though? Let's say i want a 1 turn coil, i could just wrap a copper plate around with no gaps. I will have eliminated the volume and mass of the insulation as well. Also, when i run the calculations, given that the amount of copper and the power across the coil is the same, the magnetic force and the power used by magnetic reluctance stays the same. I could find nothing that could affect the speed or the torque that is a factor of turn count. I am obviously missing something but i can't put my finger on it. So far the only reason I can think of for varying the turn count is to control how much voltage I prefer to run the thing with.
Question: Torcman offers many of its motors at a particular KV with a choice of winds e.g. 10, 12, 14 or 16. What difference does the number of winds make and is the difference significant?
Hey can you tell me how much does winding cleanliness aka overlapping plays role in performance because my emax Ecos winding look so unpleasant all that mess they do with multi stranded wire
@@RCexplained, my goal is to build a DYI esc simply for the challenge and satisfaction of doing it. After I removed the stator of an E-max MT2204 to resolder one of the leads I noticed that it was delta wound. I wrote code to successfully spin the motor in open loop but each time I tried to switch to closed loop using a quad comparator I failed. I tested LED's on the comparator outputs; they flashed on and off. I tested voltage on the outputs; Too low...I need minimum 1.65v for logic high. I wrote a program to loop slowly through the complete commutation sequence to see if I was getting logic high anywhere in the sequence...nothing. Is it possible to get a neutral ground in a delta configuration? Should I replace the comparator with an ADC? I won't quit because I know it can be done. Aside from that, I subscribed to your channel because it is full of great content. Thanks for sharing.
That is a pretty sweet project you are working on. Not sure how you can get a neutral ground in this configuration. I don't have any practical experience with this type of design.
@@RCexplained, I made some experiments and got the comparator to switch high and low which is encouraging but I still don't have the results I wanted. It's part of the fun. Thanks again.
Hi, could you make a video on BLDC scooter motors ? Please explain how can we choose the motor that'll give good speed and decent torque. My electric scooter motor is 1500w, low KV high torque motor that operates on 72V. So basically I want to know if I can get this motor any faster without generating energy losses or should I buy a different motor. And what are the turn numbers and kV /wattage / voltage values should I look for for the new motor ?.
Hi Adam, If you try and push your motor harder, you will start to generate more heat. To get the motor to spin faster, choosing the right wind which equates to kv is important.
I use 30 amp esc for 4000 kv bldc, why its getting hot when i use big prop for my boat...but when i use 2000 kv motor and the same prop its not getting hot
I need an advice. I planned to make an Electric Scooter as a school project. I have 200Watt motor, but I want to increase it to 500Watt. What should I do to increase the motor power?
Hello, you may see a very thin small wire inside the motor, however that wire is in parallel with many other strands. In some case all the wire that you see is of the same "turn." This would be true in a 1Y or 1D wind.
Oh ok that makes much sense, but I see motors online such as the tp 100 or the tp 100xl which is relatively small for how much power they can put out (96 hp or 72kw) they pull up to 600 amps of current, it just doesn’t seem like you’ll even have enough wires to handle that current, for how big the motor is (about 1 foot long and 6 inches in diameter) all those wires running in parallel still just doesn’t seem like enough to handle the upper 600s in current. Unless they are, could you maybe explain this if possible. Thank you!
@@caleb1951 The TP 100XL is a 4 turn motor with an Rm value of 0.00146 ohms. Working out what the equivalent wire gauge would be assuming a total turn length of 9-10 feet is 2AWG. That wire can handle some serious power. At 50 volts and 500A, the voltage drop in the wire is about 1.5%.
RCexplained oh ok so basically they run the smaller wires in parallel so they all together create a 2 gauge wire. Then they wrap them 4 times, and they can handle tons of power. Thank you so much for the help! I’m pretty new to this stuff
A higher timing setting will provide you with a higher top speed, however you will be sacrificing low end torque potential. For your drag race, you would have to do many trials using each setting, recording your elapsed time and trap speed. Choose the setting that most influences a positive shift in your times.
Hello, Thank you so much for your video. I was wondering if there are two different types of drivers, one for wye and the other for delta? And also how can I tell if a particular motor is delta or wye as both have three wires coming out? Some may have 4, that would automatically perhaps mean wye ( not sure on that).
A speed control will drive both wind types on a brushless motor. You wouldn't be able to tell easily by looking at the motor. All brushless motors will have 3 wires exiting. In some cases manufactures list their specific wind in the motor. A 2Y or 2D would represent the number of winds and the winding termination. In this case 2 turns wye and 2 turns delta respectively.
@@RCexplained Can you run a set up that is a pair of magnet that is same pole facing out inside a stator that is 3 coils also same pole facing in with a bldc driver? Can such a motor fall under bldc motor? Because I was under the impression that bldc comes in pair magnet opposite poles mulitiple of two and coils opposite poles multiple of three. Or is it that the coils all have the same face and the driver determines which pole a particular coils gets? And the magnet is in opposite pair poles at all times of course....??
Hi Blue Ocean, I'm not sure I understand what you mean. There are a few different calculators and charts online that covers stator slots and magnetic pole counts.
Thank you for your great video presentation! My main concern with windings is to know what the difference when changing termination to a 36 slot star bldc. If for example terminated after the last pole of the 3 phases, 1 time per rotation, in contrast with every 3 slot termination, 12 times per rotation. How that effect Kv and torque? Thank you again!
HI, thank you for the comment! I don't quite understand what you are asking. Would you happen to have a diagram of the terminations you are looking at? Or you can list it out by nomencalture? ex. 36 slot, 4 pole, 2D vs 36 slot, 4 pole, 2Y
@@RCexplained thank you for your quick response! The motor im working on is a 36 slot, 48 pole (24pp) 12Y outrunner washing machine bldc which i change the winding termination.This used to be like 1 termination for all 3 phases and i have changed it like 1 termination every 3 poles, 12 in total.I have done this to help the motor deliver more torque at low voltage and higher amps, connecting with a common rc ESC.. I don't know if i make it clear. Any thoughts would be great!
@@WhyNotCycles If as a result of your changes, the internal winding resistance of one phase decreases, I would expect that the Kv increased and you will see higher torque at lower voltages.
I want to know how to reduce kv of brushless motor ? Is the method for reducing kv for brushless innrunner motor and outrunners same ya different ? Also you said heat is main issue in motors How to solve heat issue in outrunners
@@pratikraut7552 are you planning on taking the motor apart to modify it's specifications? This can be very intimidating. To reduce the kv, the easiest method is to increasing winding count. If your motor has 12 turns increasing to 14 turns will decrease the kv. This works for in runners and outrunners. Good amount of air cooling will keep an outrunners cool. If it is still over heating reduce the load of the motor or increase the size of the motor.
Thank you much for replying and clearing my doubts Earlier motor had 11 thin copper wires wound around one stater pole 5 times and in delta pattern Now if i increase no of turns i would have to use less no of strands What to do in this case Can i use only one thick wire to do rewind instead of using many wires
Each winding has two wires. Connect them in delta and you end up with four connectors. This is why I always believed delta winding is a myth. Doesn't exist in real world
