View Full Version : need help building a FY-Quad X-4
lamadude
05-04-2012, 09:15 PM
Hi. I have a Feiyu-Tech Quad X-4 and I'm at the point where I need to wire the ESC to the motors and I have a slight problem. The 3 wires off the motor are standard red,blue,black(left to right) but the 3 corresponding plugs on the ESC are all black and I don't know which wires to plug into what and I don't want to fry the electronics by cross wiring. Anybody have any suggestions? The ESC is a HobbyWing 20A Brushless ESC.2-3SLipo, BEC2A@5V or do I just plug them in left to right as they stick out of each motor as red, blue, black to the 3 black plugs on the ESC, left to right with the ESC sitting face up(writing facing up)?
Any help is greatly appreciated as I have never had to wire a helicopter before and I'm a little over my head. I think?, I can figure out the rest of the wiring, but this part has me a little worried.
Thanks
JamesBC
05-05-2012, 12:10 AM
Makes no difference, just plug all of them in and check to see if the motor is turning the proper way for where it is on the Quad.
If it is not turning the proper way, just unplug two of the wires and swap them to change the direction.
Jim
hifly2104
05-06-2012, 07:17 AM
Makes no difference, just plug all of them in and check to see if the motor is turning the proper way for where it is on the Quad.
If it is not turning the proper way, just unplug two of the wires and swap them to change the direction.
Jim
Basically as James BC has said . Is this the 90Q controller how is the setup(manual)
Mark L @ FL
05-07-2012, 04:21 AM
As other have noted, it doesn't matter. If the motor spins the wrong way just swap any 2 wires.
If you need any help feel free to PM me and I sell the X4 kits so have experience with them.
dege13
05-07-2012, 11:19 AM
The reason why it does not matter which wire goes where between the ESCs and motors is that the motors are three phase motors.
Here is a bit of info on three phase power:
"hree-phase motors are motors designed to run on the three-phase alternating current (AC) power used in many industrial applications. AC electricity changes direction from negative to positive and back many times a second. The AC you get in your house, for example, goes from negative to positive and back again 60 times a second. AC changes power in a smooth continuous wave called a sine wave. Three-phase AC has three sources of AC power, all out of phase with each other. That means that no two AC waves are ever at the same point at the same time."
Read more: How a Three-Phase Motor Works | eHow.com http://www.ehow.com/how-does_5191973_three_phase-motor-works.html#ixzz1uCV3MT4l
The animation in this video helps to explain how the three phases works to rotate the motor and therefore explains why switching two of the wires will change the direction of rotation:
http://www.youtube.com/watch?feature=player_detailpage&v=6sFIIUR5V3U#t=66s
Doing more research on this, I found that the ESCs are outputting DC voltage, even though it does go into negative voltages. It looks like ESCs use square waves making it not AC current. Lots more talks about that here if anyone is interested:
http://www.rcuniverse.com/forum/m_1558046/tm.htm
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