All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > General Electronics Chat

Notices

General Electronics Chat Discussion forum for general chat about anything electronics related, including asking questions about material in the All About Circuits E-book, Worksheets, and Videos.

Reply   Post New Thread
 
Thread Tools Display Modes
  #1  
Old 08-07-2010, 02:45 PM
drinkr drinkr is offline
New Member
 
Join Date: Aug 2010
Posts: 4
Default wiring a AC 120 v motor to make is reversable

Im trying to wire a 1/2hp 120v Harbour Freight motor to a dpdt switch to make the motor reversable on a draw bench Im constructing. The motor has 4 wires black red orange and white. http://manuals.harborfreight.com/man...6999/36549.PDF

Last edited by drinkr; 08-07-2010 at 02:54 PM. Reason: add link
Reply With Quote
  #2  
Old 08-07-2010, 03:01 PM
shortbus's Avatar
shortbus shortbus is offline
Senior Member
 
Join Date: Sep 2009
Location: ohio,usa
Posts: 2,750
Default

Quote:
Originally Posted by drinkr View Post
Im trying to wire a 1/2hp 120v Harbour Freight motor to a dpdt switch to make the motor reversable on a draw bench Im constructing. The motor has 4 wires black red orange and white.

Not all single phase motors are reversible (without completely rewiring internally) If your motor is, it will usually state that on the "name plate", where the specifications are. Also inside the wiring cover plate it will show the wire connections for each direction.

Most motors sold for, "compressor duty" at Harbor Freight are not reversible. This is why they can sell them so cheap.

But after looking at your manual, this one can be reversed. Go to; http://en.allexperts.com/q/Electric-...witch-110V.htm It will give a explaination on how to do it.

Last edited by shortbus; 08-07-2010 at 03:10 PM.
Reply With Quote
  #3  
Old 08-07-2010, 03:06 PM
drinkr drinkr is offline
New Member
 
Join Date: Aug 2010
Posts: 4
Default

this motor is reversible. I modified my post to add the manual. I can change direction by changing the black and red wires
Reply With Quote
  #4  
Old 08-07-2010, 04:15 PM
drinkr drinkr is offline
New Member
 
Join Date: Aug 2010
Posts: 4
Default

Im not sure if I understand yet. I wanted to use the motor both forward and reverse with a dpdt switch. Is this possible
Reply With Quote
  #5  
Old 08-07-2010, 06:41 PM
BMorse's Avatar
BMorse BMorse is offline
Senior Member
 
Join Date: Sep 2009
Location: Vermontville, Michigan (GMT -5)
Posts: 2,658
Blog Entries: 15
Default

Can't anyone look at the attached PDF for the motor wiring???? Instead of speculations and theories, it is much better to provide an actual solution for the OP's question.... which is pretty simple if anyone bothered to look at the motor specs....

DPDT AC Motor Reverse.png

In the above circuit, the motor will be rotating counter clockwise when Relay is not energized, once the relay is energized, then the motor will spin clockwise.... Just remember to have to motor power off, and the motor needs to be at a complete stop before switching rotation direction, if you try to switch the rotation while the motor is spinning or powered up, it will just continue to go in the same direction and WILL NOT switch directions.

The same wiring can apply to a DPDT switch since the illustration shows a DPDT relay, just connect the same connections to your switches NO, and NC connections....

B. Morse
__________________
There is no spoon -Neo-
Disclaimer: The example programs,circuits, projects and information I provide or post on this web site are for educational purposes only. By copying anything from this site posted by me, you agree to the "as is" nature of the programs, circuits, information and to the statements listed in this disclaimer.No warranty or liability is expressed or implied. Working with AC /DC voltages can be dangerous and even deadly. Proceed at your own risk!
Reply With Quote
  #6  
Old 08-07-2010, 08:24 PM
drinkr drinkr is offline
New Member
 
Join Date: Aug 2010
Posts: 4
Default BMorse

would it be possible for you do send the same kind of drawing for a DPDT switch? Im a novice in these type of things. Thanks in advance
Reply With Quote
  #7  
Old 08-07-2010, 10:01 PM
BMorse's Avatar
BMorse BMorse is offline
Senior Member
 
Join Date: Sep 2009
Location: Vermontville, Michigan (GMT -5)
Posts: 2,658
Blog Entries: 15
Default

Sure, like I said the connections are the same,

DPDT AC MOTOR REVERSE SWITCH.png

B. Morse
__________________
There is no spoon -Neo-
Disclaimer: The example programs,circuits, projects and information I provide or post on this web site are for educational purposes only. By copying anything from this site posted by me, you agree to the "as is" nature of the programs, circuits, information and to the statements listed in this disclaimer.No warranty or liability is expressed or implied. Working with AC /DC voltages can be dangerous and even deadly. Proceed at your own risk!

Last edited by BMorse; 08-08-2010 at 12:14 AM. Reason: edited schematic to show main power switch
Reply With Quote
  #8  
Old 08-07-2010, 10:45 PM
jpanhalt jpanhalt is online now
E-book Developer
 
Join Date: Jan 2008
Location: Ohio, USA(GMT-5)
Posts: 3,651
Default

Let me re-emphasize BMorse's suggestion. It is rare to find a 110V single-phase motor that is instantly reversible. That is, if the armature is still turning, and you throw the DPDT switch, there is a very high likelihood that the motor will continue running in the same direction.

I suggest a DPDT center off switch. ALWAYS pause at the off position until the motor stops rotation before going to reverse. Special switches are made that have a lock out to ensure a stop, but if you are the only user, you can probably get by without the lock out.

John
Reply With Quote
  #9  
Old 08-08-2010, 12:13 AM
BMorse's Avatar
BMorse BMorse is offline
Senior Member
 
Join Date: Sep 2009
Location: Vermontville, Michigan (GMT -5)
Posts: 2,658
Blog Entries: 15
Default

jpanhalt is right, I want to emphasize that the drawing submitted here for guidance requires the AC mains to have a separate switch, which has to be switched off, and the motor/armature is at a complete stop before switching the DPDT switch to reverse direction...

B. Morse
__________________
There is no spoon -Neo-
Disclaimer: The example programs,circuits, projects and information I provide or post on this web site are for educational purposes only. By copying anything from this site posted by me, you agree to the "as is" nature of the programs, circuits, information and to the statements listed in this disclaimer.No warranty or liability is expressed or implied. Working with AC /DC voltages can be dangerous and even deadly. Proceed at your own risk!
Reply With Quote
Reply   Post New Thread

Tags
, , , ,


Related Site Pages
Section Title
Worksheet Servo motor systems
Worksheet AC motor theory
Textbook Stepper motors : Ac Motors
Worksheet DC motor theory
Worksheet Kirchhoff's Laws
Textbook What is alternating current (AC)? : Basic Ac Theory
Textbook Induction motor, large : Ac Circuits


Similar Threads
Thread Thread Starter Forum Replies Last Post
AC alternator & coil winding connections & theory enduro250z General Electronics Chat 9 07-30-2010 03:14 PM
Help I get AC voltage through DTV coaxial cable from antenna dssence Radio and Communications 19 03-15-2010 07:53 PM
AC Light Wiring Dalaran The Projects Forum 5 02-06-2010 03:46 AM
120 v ac to 12 v dc magnumrtawd The Projects Forum 2 01-14-2010 04:08 PM
Wiring Help 230v ac 1phase motor shadowPDW General Electronics Chat 1 06-05-2009 10:31 PM

Thread Tools
Display Modes

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

Forum Jump


All times are GMT. The time now is 01:24 PM.


User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.