Go Back  R/C Tech Forums > General Forums > Rookie Zone
Battery directly to Brushed motor >

Battery directly to Brushed motor

Battery directly to Brushed motor

Reply

Old 03-31-2013, 09:57 PM
  #1  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default Battery directly to Brushed motor

Is it possible to hook a HPI Racing 1146 Firebolt 15t Motor (540 Type) directly to a battery without an esc? I just want to be able to turn it on and off. What kind of battery would you recommend?
Johnkow is offline  
Reply With Quote
Old 04-01-2013, 10:26 AM
  #2  
Tech Adept
iTrader: (11)
 
rcracer207's Avatar
 
Join Date: Mar 2011
Location: Casco, Maine
Posts: 102
Trader Rating: 11 (100%+)
Default

Yes you can.
I would suggest a NiMH since you won't have an ESC to cut off power when voltage gets low. A lipo would work but you would want to monitor voltage closely so that you do not discharge the cells beyond 3v /cell and cause damage to the battery
rcracer207 is offline  
Reply With Quote
Old 04-02-2013, 02:29 PM
  #3  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default

So a 7.2v Ni-MH battery would be too powerful?
Johnkow is offline  
Reply With Quote
Old 04-02-2013, 03:22 PM
  #4  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default Hooking up a Battery directly to Brushed motor

Is it possible to hook a HPI Racing 1146 Firebolt 15t Motor (540 Type) directly to a 7.2 Ni-MH battery without an esc? I just want to be able to turn it on and off.
Johnkow is offline  
Reply With Quote
Old 04-02-2013, 03:59 PM
  #5  
Tech Addict
iTrader: (37)
 
Join Date: Oct 2011
Posts: 508
Trader Rating: 37 (100%+)
Default

Yes it's possible. positive to positive, negative to negative. Wire in a switch on the negative side. Good luck controlling it.
jzwolen is offline  
Reply With Quote
Old 04-02-2013, 04:03 PM
  #6  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default

Ok. Thank you.
Johnkow is offline  
Reply With Quote
Old 04-02-2013, 04:10 PM
  #7  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default

Will it burn up if it runs for 2-3 mins?
Johnkow is offline  
Reply With Quote
Old 04-02-2013, 04:47 PM
  #8  
Tech Master
iTrader: (102)
 
TeamSkunkwerks's Avatar
 
Join Date: May 2010
Location: Tennessee
Posts: 1,738
Trader Rating: 102 (100%+)
Exclamation

Well....it will need some airflow to help cool the motor off. I'd be worried about the brushes, springs, & having to cut the comm from the heat & extreme usage.
Not to mention running the battery down flat down to 0.
TeamSkunkwerks is offline  
Reply With Quote
Old 04-02-2013, 04:51 PM
  #9  
Tech Rookie
Thread Starter
 
Join Date: Mar 2013
Posts: 6
Default

I'm only using it for about 2-3 minute runs a total of 4 times. With enough ventilation, would the motor and battery be alright? Do I have to run the battery down to zero after every 2-3 min run even if all 4 runs will be in one day?
Johnkow is offline  
Reply With Quote
Old 04-02-2013, 04:56 PM
  #10  
Tech Elite
iTrader: (73)
 
Metalsoft's Avatar
 
Join Date: Jun 2009
Location: Nashville, TN
Posts: 2,060
Trader Rating: 73 (100%+)
Default

Originally Posted by Johnkow View Post
I'm only using it for about 2-3 minute runs a total of 4 times. With enough ventilation, would the motor and battery be alright? Do I have to run the battery down to zero after every 2-3 min run even if all 4 runs will be in one day?
No reason to worry, just hook it up and let it run, if you are only going to run it like you stated, you won't even have to charge the battery.

Hook it up and let it rip, it's not going to hurt either one.
Metalsoft is offline  
Reply With Quote
Old 04-02-2013, 04:59 PM
  #11  
Tech Master
iTrader: (102)
 
TeamSkunkwerks's Avatar
 
Join Date: May 2010
Location: Tennessee
Posts: 1,738
Trader Rating: 102 (100%+)
Arrow

PM sent.
TeamSkunkwerks is offline  
Reply With Quote
Old 04-02-2013, 05:04 PM
  #12  
Tech Master
iTrader: (102)
 
TeamSkunkwerks's Avatar
 
Join Date: May 2010
Location: Tennessee
Posts: 1,738
Trader Rating: 102 (100%+)
Default

Never run the battery down to flat 0!!
When you see a major decrease in power, then charge it up. Let the battery cool down first though.
How many MaH are you using?
TeamSkunkwerks is offline  
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service