Well done on the video however I would like to add something. If the two motors are identical and ESC of correct rating you should not have desync issues. The two motors should phase lock (3 phase generation principle) a scope would confirm this/bl heli frames. Not advisable though.
I liked the video (not many like this on the net) and can even tell that even when using the same motor the max RPM will never be achieved, it is better to have Two ESC's and 2 motors
It dosnt work. I dont know if it works to connect a 6diode rectifire. I think it dosnt work, becourse the back emf is missing and the Esc trys to get more and more speed.
A three wire esc is for a brushless motor. Brushless esc's send pulses of current to each set of windings. A 2 wire esc literally just connects the battery to the motor. A 2 wire esc at full throttle is no different than connecting the battery DIRECTLY to the motor. Google how brushless vs. brushed work.
Can I do it can do it the way you're doing but instead of using a stack just plug everything into my receiver and use a y harness cuz I seen somebody use that in another video with the Y harness well the motors and the ESC work with a receiver instead of a stack
What would happen if you lock the shafts of the two motors together and then run from one ESC in parallel? If the kv is the same and you can somehow align the motors before locking together, would this allow both to run efficiently?
That seems to work on RC cars like the E-maxx where you sync both motors before meshing them with the spur gear. I've seen it done with 1 or 2 ESCs. I also have a Nikko rc car that has entirely separate motors and transmissions at the front and back and I've used 1 ESC and 2 brushless motors and it to work fine. Maybe a little stuttery off the line sometimes, especially a low speed start but once it was up and running it went like a dream to be honest.
I watched earlier and found interesting, especially how one affects the other. I had an idea, isolate the motors from each other by running the one motor directly from the controller and then use the 3 phases to control the gates of 6 MOSFET,s to drive the second motor. Just a thought that came to me watching Master Chef ( don't ask) have not tried but wondering about an easy way to make my skateboard 4wd.
@@Joyplanes HI, take a look at this. electronics.stackexchange.com/questions/272338/running-bldc-motor-without-hall-effect-sensor-or-back-emf With a skateboard starting is not an issue but can be a benefit due to inertia of your body if you open up throttle a bit much from stationary.
I'm trying to find out about this, I'm building a gokart using Segway wheels but only want to use the circuitry from 1 Segway, any info would be greatly appreciated
Nice, this explained alot. I'm working on 4x4 drive rover wheel, something like a mars rover. Maybe I will go for 1 ESC to 4 motors. this saves a lot of esc
Thanks you for the video. Quite informative. From what you demonstrated, my conclusion is that using two same motors, with double sized controller should work fine. But I would use motors that use hall sensors and plugged one of them into the controller.
The thing you say is bad ie if one motor stops so dies the other could be a good thing in a plane for a novice pilot, I saw a guy crash a twin motor model because one motor failed and he could not control the model due to to the other motor puling the plane into a spin. However I absolutely agree it's a bad idea and esc do not cost much anyway so why would you even bother risking running two motors from one esc?
Very informative.....but can you tell me what to do if i want to control two motors.......actually i am working on a rc boat for which i need to control two propellers for turning and speed enhancement.
Thanks bro please make these kind of more videos...🙂 bro tell me one thing if my rc plane have right and down thrust can i use the cw propeller. As i have used but its not flying.. i have to uses only ccw propeller then its flying well.. why?
Thanks for the test. I've got an 80A ESC that I want to use to power to max 30A motors of the same kind and same payload. This is for a ball launcher so I don't think it will really matter to use the one ESC. Let's see what happens! haha
Thanks. Very helpful. Trying to make vtol plane with 2 edfs and now I understand how to have the same amount of current flowing through each one. Thanks again.
One esc can used to drive two identical motors but the wires have to be very short. It works but definitely not recommended. Any differences in motors' specification, a new and an older motor, impedance due to longer or bad cables, can cause one of the motors stop or tickle due to desync.
@Joyplanes RC I like how you showed in the diagram at 2:35 that the signals might be out of phase. And in theory that should result in a failure, in reality it showed that is seemed just fine. this is because the ESC will try to sync then unintentionally by slowing down one motor until they are the same. This has the effect that it creates an oscillation in these signals equal to the switching frequency that will work against both motors. and this it the observed reduced efficiency as its wasting power trying to correct the errors. And although it is possible to run motors this way it is still not recommended as in the long term it will damage the ESC and/or the motor(s)
So it can and will work just fine with no issue if your esc is double the rating? I’m making an edf car with one large brushless esc and 2 small brushless UMX motors
So yes it absolutely can be done and works fine. Obviously if one motor stops the other will too. Obviously there is no redundancy for loosing a sinlgle esc if there is only one esc.
I wanted to build a y-6 drone back then using 6 motors and 3 esc. I didn't even get the pair of motors spinning like yours lol The motors only kept on shaking but never spinned. So it's really not recommended to run multiple motors with one esc
You change direction of a brushless motor's spin by swapping out any 2 of the 3 wires. But now you need a reverse prop and you will either need to use a Left-Hand nut to secure the prop to a Left-Hand prop shaft/adapter, or use a Lock Nut or a Cotter pin thru the Right-Hand nut and shaft. Otherwise it will eventually spin the nut off the prop shaft.
Title reminds me of two girls one cup 😂 good material tho, but it's quite obvious that 2 motors will draw 2x more current than one, hence the ESC temperature.
@@szajba8106 It's the same as doing two batteries in parallel. Two motors in parallel are splitting the load of the weight and inertia between each other. Although once the car is up to speed, they'll start pulling a high current on each individual motor again as they struggle to maintain a high speed, although that top speed should be slightly higher than just the single motor
Hi mate. What I'm trying to find out is on a boat setup with twin motors. I want to be able to cut power to one motor for turning without using a servo or rudder. A link to relevant information would be amazing, I can't find anything at all. Thank you 🙂
