Repaired Motor Problem

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asecawy Member Join Date: Jun 2008 Location: Alexandria Posts: 9 Good Answers: 1	Repaired Motor Problem 11/18/2008 3:35 AM
	Hello every one, I have Inverter Hitachi 22KW, and an old repaired Motor [ name plate says: 2poles - 380V 35.5A delta, 660V 20.6 A star - 50/60Hz - 2850 rpm - 18.5 Kw - power factor 0.92] I have connected the motor Delta ,380V , overload 35A, max frequency 49hz when operation using the inverter the motor temperature get too high and consume 30A when direct connecting the motor to 3 phase source temperature is not very high my question is: Is there difference between inverter output (50HZ ,380V) and the direct source (50 Hz ,380V) ? __________________ TO BE is TO DO
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sachin_pawaskar2001 Participant Join Date: Nov 2008 Posts: 3	#1 Re: Repaired Motor Problem 11/18/2008 3:58 AM
	In both conditions dose the speed was rated speed & the motor was driving the same load?
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Anonymous Poster	#2 Re: Repaired Motor Problem 11/18/2008 8:19 AM
	Hello every one, you will change frequency 50hz. may be this is wrong i am very sorry.
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Johny451 Power-User Join Date: Aug 2008 Location: Melbourne, Australia Posts: 476 Good Answers: 32	#3 Re: Repaired Motor Problem 11/19/2008 3:54 PM
	Are you operating the motor at the same speed as direct-connect when running from the inverter? __________________ johny451
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asecawy Member Join Date: Jun 2008 Location: Alexandria Posts: 9 Good Answers: 1	#4 Re: Repaired Motor Problem 11/27/2008 2:47 AM
	dear all, i have made star delta starting panel to test the motor i found that motor temperature goes high also but after some time (20min), so the inverter is not responsible about that high temperature motor winding may be not perfect!!! bearing may not be suitable!!! __________________ TO BE is TO DO
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Anonymous Poster (1); asecawy (1); Johny451 (1); sachin_pawaskar2001 (1)

You might be interested in: Motor Controllers, AC Motor Drives, Motor Test Equipment

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