ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 15 guests, and 20 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Universal Motors Concern #129329
01/21/05 09:46 PM
01/21/05 09:46 PM
S
splitzapper  Offline OP
Junior Member
Joined: Jan 2005
Posts: 6
Davao
Hello there. I am about to use a Universal Motor(a Mototr that can both operate in an AD or DC supply). However i am quite confused by its rating. It is rated at 120 Volts AC. But my supply or source is DC since i am going to use it outdoors. My question is:
Is it safe to use a supply of 120dc?
If not which of these supply can i use?(all in dc)

12 0r 48 volts?
what would be the ideal dc source of it?
will it be 120/sqrt of 2 v dc?

thanks,


Oh Yeah!
Tools for Electricians:
Re: Universal Motors Concern #129330
01/22/05 01:01 AM
01/22/05 01:01 AM
P
peterpang  Offline
Member
Joined: Jan 2005
Posts: 19
toronto
There should be a voltage range in the nameplate on the enclosure of the motor or in the manual.

Normally this voltage range is same for AC or DC.For example,24-240,you can applied 24dc or ac,240 dc or ac.Higher voltage applied,more power the motor can output.So you can apply 24dc...48dc...50dc...100dc......to the motor,it depends on your appliance!!
But DO NOT exceed the rated voltage range!!!!

There is a frequency requirement for ac supply,for example 60HZ!!

when applied same voltage to this kind of motor,dc is more effective than ac!!

[This message has been edited by peterpang (edited 01-22-2005).]

Re: Universal Motors Concern #129331
01/29/05 02:52 PM
01/29/05 02:52 PM
Trumpy  Offline

Member
Joined: Jul 2002
Posts: 8,260
SI,New Zealand
No Way!.
splitzapper,
Where are you getting a 120VDC supply from?.
Using a lower than design voltage on a motor will always end in tears, as does a higher voltage.
Personally I'd stick with the AC mains and protect it with a GFCI, if the appliance is going to be used outside.
By the way, what sort of appliance is it?.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
255,698 Are you busy
191,677 Re: Forum
181,459 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.014s Queries: 14 (0.003s) Memory: 0.9516 MB (Peak: 1.0773 MB) Zlib enabled. Server Time: 2019-06-17 02:53:57 UTC