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Power Systems Talk about motors, ESC speed controllers, gear drives, propellers, power system simulators and all power system related topics

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Old 08-27-2011, 11:10 PM   #1
dsm0002
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Default Input Voltage from Reciever to ESC

Hey Guys,

I am working on a project for my senior design project and am tryingh to use ducted Fans. I am trying to use a Electronic Gyro to communicate with a Micro proscessor controller but I need to know at what voltage the Reciever communicates with the ESC (Electronic speed Controller) anone know?

I found that the battery feeds around 5 V to the receiver to power it. But how does the signal get to the ESC? Is it the pulse signal? Also is it possible to controll two motors indepentantly using only one battery?

Any advice or insoght would be great.
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Old 08-28-2011, 12:18 AM   #2
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Originally Posted by dsm0002 View Post
Hey Guys,

I am working on a project for my senior design project and am tryingh to use ducted Fans. I am trying to use a Electronic Gyro to communicate with a Micro proscessor controller but I need to know at what voltage the Reciever communicates with the ESC (Electronic speed Controller) anone know?

I found that the battery feeds around 5 V to the receiver to power it. But how does the signal get to the ESC? Is it the pulse signal? Also is it possible to controll two motors indepentantly using only one battery?

Any advice or insoght would be great.
Well I can help a little.

The signal we use to control ESC's comes from a Receiver or RX. I believe it is a sign wave signal, but that may be brand specific. Typically (in an airplane) the voltage supplied to the ESC comes from a battery pack, a UBEC, or the ESC has a built in BEC feature and it provides the voltage to the Receiver. Those voltages can vary, 5v & 6v are common settings, but there are RX's and servos that can handle larger voltages for bigger airplanes since larger servos need to make a lot of power. How they are controlled, is they each have a separate ESC. Those two ESC's can be wired in a multitude of ways to provide thrust vectoring type of control, or to have a master/slave setup. Thats simply done at the TX for the two channels the ESC's occupy.

It is also easy to control two alike motors from one battery, as long as the battery's C rating, and cell count are proper for the load generated by the fans. Actually, with airplanes, when controlling two motors is it usually preferred to have a single source for power. Even multi packs are wired in parallel to provide a single source.

Another point is that when using two ESC's, you do not want them to have a built in BEC function. You want the ESC's to be "Opto" type, without RX Power step down. Thats because you dont want two ESC's trying to both provide voltage to the RX.

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Old 08-28-2011, 06:16 AM   #3
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maybe these links might help, Take care, Chellie

http://www.societyofrobots.com/axon/

http://www.societyofrobots.com/micro...tutorial.shtml



http://www.rcuniverse.com/forum/m_2172624/tm.htm



http://www.hobbycity.com/hobbycity/s...idProduct=4573

Excellent device with Manual in english. It needs some basic understanding about servo control signal (puls width). First you want to do is adjust the puls width to your receiver (Function F5) and then programme this range in F0-0 to F0-3. For my Spektrum DX7 it's 1100ms / 1500ms / 1900ms / 5 μs.

a servo tester can also be used to operate a ESC to operate the motor, normally any driver that will operate a servo will operate a ESC to operate the motor

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