RC India
Home Help Calendar Login Register
Welcome Guest, please login or register.
 
Pages: [1]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: May 15, 2010, 09:28:46 PM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010

I want to test a brushless motor with a 12 lead acid battery (200ah inverter battery)... In the future I will use it with 11.1v lipo... Is it safe to do so with the lead acid? Any precautions I should take? Also I am using a micro-controller to control the esc. What kind of PWM pulses should I give to the ESC? Are the pulses the same as that we give to a servo?
Logged
 

Read
« Reply #1 on: May 15, 2010, 09:32:47 PM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010
Oh the ESC's I have are the 18A ones bought from rcforallin...
Logged
 

Read
« Reply #2 on: May 16, 2010, 12:40:34 AM »
ujjwaana
Plane Lover
Forum Hero

*****

Reputation Power: 28 
ujjwaana barely matters.ujjwaana barely matters.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Intermediate
Posts: 2384
Join Date: Oct, 2009
Yes, ESC work on exactly the same PWM signals used to control ESCs.. 12v should not upset BL motors which can handle 3S. BTW what are you up to ? static test or you really gonna put something like a Lead Acid battery on something moving/flying/floating ?
Logged
Futaba 8FG Super | HK-450v2 | FA-22 Raptor |AXN Floater-Jet | FunJet | Black Horse Edge 540 | Amp Master 015 | 2.3M Big Brother
 

Read
« Reply #3 on: May 16, 2010, 07:03:43 AM »
vinay
Global Moderator
Forum Hero

*****

Reputation Power: 20 
vinay barely matters.vinay barely matters.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Beginner
Posts: 1754
Join Date: Sep, 2009
Not sure about the PWM stuff, but you can even use a small 7.4 AH 12 V battery also for testing (like I did). With 200 AH you can run multiple motors  Wink
Logged
 

Read
« Reply #4 on: May 16, 2010, 09:25:06 AM »
hangingtough
Heli Lover
Forum Hero
*****

Reputation Power: 10 
hangingtough has no influence.
Offline Offline

City: delhi
State: Delhi
RC Skills: Intermediate
Posts: 634
Join Date: Sep, 2009
yeah , the servo pulse can be given to ESC for controlling the speed.
Logged
 

Read
« Reply #5 on: May 16, 2010, 12:57:22 PM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010
thx guys i'm testing motors for a quadcopter.... btw what is the range of pwm signals that a receiver outputs? tell me in servo angle terms... 
Logged
 

Read
« Reply #6 on: May 16, 2010, 05:17:41 PM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010
Okay! I tested the motors with a 7AH UPS battery. I cant get them to work. I dont know how to setup the ESC with the microcontroller. Anyone please tell me how to setup the ESC with a receiver for the first time? What exactly do you do?
Logged
 

Read
« Reply #7 on: May 16, 2010, 05:36:04 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !
http://www.rcindia.org/self-designed-diy-and-college-projects/brushed-or-brushless-motor-for-quadrotor/msg13928/#msg13928

That answers the pulse you need for 0 to 100% throttle. 

There is confusion about the receiver part.  If you are using the micro-controller to control the ESC (throttle range), where does the receiver come into the picture ?

Normally (ie, without any micro-controller), the ESC feeds power to the receiver via the black (ground) and red (roughly + 5v or +6v), and the receiver sends signals to the ESC for throttle control (and the signal details are in the thread mentioned above).
Logged
Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #8 on: May 16, 2010, 08:09:07 PM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010
Sorry about the ambiguity.. I wanted to know exactly what kind of signal The receceiver sends the ESC..... I;ll go through that link you gave..
Logged
 

Read
« Reply #9 on: May 16, 2010, 09:40:02 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !
This post form the same thread has a picture of the waveform you need to send.

http://www.rcindia.org/self-designed-diy-and-college-projects/brushed-or-brushless-motor-for-quadrotor/msg13916/#msg13916
Logged
Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #10 on: May 17, 2010, 08:39:19 AM »
Gaurav
Plane Lover
Active Member
**

Reputation Power: 1 
Gaurav has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 30
Join Date: May, 2010
I changed the PWM timings a bit and it works perfectly now... Initially I feared the quadcopter might be underpowered.. now I think it might take me with it... The power is mindblowing!!! Will put up a video soon...
Logged
 

Read
« Reply #11 on: July 17, 2010, 03:15:00 PM »
Prerak
Plane Lover
Active Member
**

Reputation Power: 1 
Prerak has no influence.
Offline Offline

City: Hyderabad
State: Andhra Pradesh
RC Skills: Beginner
Posts: 10
Join Date: May, 2010
@gaurav - anything happening with the quad ?? we are still waiting for the video !!!
Logged
 

Read
« Reply #12 on: April 24, 2012, 08:36:22 PM »
gurudattapanda
Last of my kind
Plane Lover
Active Member

**

Reputation Power: 1 
gurudattapanda has no influence.
Offline Offline

City: Berhampur
State: Orissa
RC Skills: Intermediate
Posts: 51
Join Date: Mar, 2012

Sum ppl constructs, sum r8 prog, We controls all!
@Gaurav: Please do not try with 200AH Lead Acid battery to 18 Amp ESC!! See the battery specification about the burst current/maximum current delivers. Use a greater value ESC than the Battery Max Current supply, its a regular practice!!
Logged
Failures give idea in how many method we can fail, leading the way to success.
 

Pages: [1]   Go Up
RC India  RC Models  Self-designed, DIY and College Projects  Topic: Powering brushless motor with 12v lead acid....
 « previous next »
Jump to:  

Related Topics
Subject Started by Replies Views Last post
First CDROM Brushless Motor
Self-designed, DIY and College Projects 		sandeepm 3 7999 Last post May 11, 2009, 03:54:19 PM
by RotorZone
Help me with lead acid batteries.
Batteries and Chargers 		coeprobotics 9 7043 Last post June 25, 2010, 01:17:25 AM
by akky
brushless motor
Beginners Zone 		balasubrahmanyam 19 15883 Last post November 02, 2010, 12:24:16 AM
by ashJR7202
Are 12V Lead Acid batteries suitable for high amp draw use.
Batteries and Chargers 		ajit4647 6 4584 Last post May 19, 2011, 05:06:01 PM
by Tassem
3.5mm Male/Female Bullet Brushless 16awg Motor Extension Lead 200mm wire
For Sale 		Rc Foam Makers 1 1625 Last post May 04, 2016, 06:23:37 PM
by Rc Foam Makers
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder 		Realized by Systalent | XHTML | CSS