Conventional VFD

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engr. Participant Join Date: Jun 2012 Posts: 4	Conventional VFD 06/26/2012 6:34 AM
	hi all, just wanna ask if I can use a non servo VFD to a servo motor? If I can do so what parameters do I have to change?
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	Pathfinder Tags: Servo motor

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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	#1 Re: conventional VFD 06/26/2012 6:45 AM
	Why would one want to? __________________ "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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NotUrOrdinaryJoe Guru Join Date: Apr 2008 Location: Lexington, KY Posts: 1639 Good Answers: 73	#2 Re: Conventional VFD 06/26/2012 1:00 PM
	Most non servo VFD's are designed to run a three phase induction motor. Among the parameter differences will be the number of poles and the peak current that the VFD could withstand. The VFD will want to drive the motor with a relatively constant voltage but use current to generate torque. A servo motor generally swings the voltage all over the place and the current follows. Consequently, you will not get very good performance from the VFD as a drive device. Not knowing what brand of VFD or motor you are talking about, I can tell you that one thing your VFD probably does not have is any kind of input for overheating warning. Consequently, by experimenting you may cause permanent damage to either or both devices if they are too far apart in operating ranges. By the time you finished experimenting you might not be impressed by the performance of either device. But using a good servo drive should be much more interesting because they can start and stop very rapidly. Can't do that with a VFD and an induction motor very well. __________________ A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle
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engr. Participant Join Date: Jun 2012 Posts: 4	#4 In reply to #2 Re: Conventional VFD 06/29/2012 5:35 AM
	Thank you sir......
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JRaef Guru Join Date: Sep 2006 Location: California, USA, where the Godless live next door to God. Posts: 4665 Good Answers: 804	#3 Re: Conventional VFD 06/26/2012 6:44 PM
	Where are you going to connect the resolver or encoder from the servo? __________________ All I every really wanted to be, was... A LUMBERJACK!.
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engr. (1); JRaef (1); NotUrOrdinaryJoe (1); PWSlack (1)

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