Where To Get A Separately Excited DC Motor

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eng_alhemyari Participant Join Date: Sep 2012 Posts: 4	Where To Get A Separately Excited DC Motor 10/16/2012 10:33 PM
	I am looking for a separately excited dc motor with following ratings: Rated power: 1.5 kW Rated Speed= 1500 rpm Rated armature voltage: 420 V Rated armature current: 15 A Rated Field voltage: 310 V Rated Field current: 3 A I am in Malaysia Could any one advice me where can I get this motor, please? Thank you in advance.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Where to get a separately excited dc motor 10/16/2012 10:45 PM
	Go here:Search GlobalSpec. Or, the Commercial Section here.
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tcmtech Guru Join Date: Jun 2009 Location: South of Minot North Dakota Posts: 8376 Good Answers: 775	#2 Re: Where to get a separately excited dc motor 10/16/2012 11:52 PM
	I already see s problem with your specs. 1.5 Kw with a 420 volt 15 amp input. Plus the 310 volt 3 amp field seems a bit off as well.
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eng_alhemyari Participant Join Date: Sep 2012 Posts: 4	#3 In reply to #2 Re: Where to get a separately excited dc motor 10/17/2012 12:08 AM
	Actually I need a 1.5kW 1500 rpm dc motor. This motor will be used to emulate a wind turbine characteristics. So, It's torque will be controlled using a SINAMICS DC Drive. For the driver output ratings, the armature is 420 V and the field is 310 V with 15 A and 3 A current ratings. As I understand, the motor ratings should match the driver ratings. Are the specifications which I posted resonable, or there is something wrong? Please explain. Thank you
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tcmtech Guru Join Date: Jun 2009 Location: South of Minot North Dakota Posts: 8376 Good Answers: 775	#4 In reply to #3 Re: Where to get a separately excited dc motor 10/17/2012 2:30 AM
	Well 420 x 15 = 6300 watts so there is one specs problem. Then add the 3 amp 310 volt stator pwoer and thats another 930 watts of power so... you are looking for a motor that takes around 7230 watts to produce 1500 watts of mechanical output. I think you need to read up on motors and motor drive unit ratings.
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TonyS Guru Join Date: Aug 2010 Location: Resting under the Major Oak Posts: 4347 Good Answers: 181	#5 In reply to #3 Re: Where to get a separately excited dc motor 10/17/2012 2:10 PM
	A 1.5KW DC motor should be an off the shelf item. You then configure the drive to the motor. You seem to have __________________ The reports of my death are greatly exaggerated.
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Andy Germany Guru Join Date: Sep 2006 Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E Posts: 17996 Good Answers: 200	#6 Re: Where To Get A Separately Excited DC Motor 10/18/2012 4:49 AM
	Theoretically, most normal industrial (not PMM types of course) DC motors can have the fields separated with a tiny bit of luck and skill....never done it myself though..... Thought about it a few times as I was trained many years ago on "Ward-Leonard" Systems....Invented in 1891... See here only if you are interested:- Ward_Leonard_control __________________ "What others say about you reveals more about them, than it does you." Anon.
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Andy Germany Guru Join Date: Sep 2006 Location: Near Frankfurt am Main, Germany. 50.390866N, 8.884827E Posts: 17996 Good Answers: 200	#7 Re: Where To Get A Separately Excited DC Motor 10/18/2012 5:21 AM
	It just struck me, surely a modern VFD would do this job at least as good, if not better? What I know nothing about, but maybe even cheaper and smaller.......someone here must know! __________________ "What others say about you reveals more about them, than it does you." Anon.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#8 Re: Where To Get A Separately Excited DC Motor 10/05/2020 8:11 AM
	Yes. The organisation's Buyer will have access to this sort of information. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Andy Germany (2); eng_alhemyari (1); lyn (1); PWSlack (1); tcmtech (2); TonyS (1)

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