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Motor rated parameters not matching with drive parameter list.

Created by: PISCEAN 2010 at: 6/27/2011 5:33 AM (5 Replies)

6/27/2011 5:33 AM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 11/14/2024 Posts: 8092 Rating: (878)	Hello Experts, On the lathe Siemens make induction motor type no 1PH7184-2ND03-0BC0 is installed for spindle application. Its namplate rated parameters arei.e. 39 KW, Amp = 90, 1000 RPM, 335 Volt Y. Type of regulator used is 6SN1123-1AA01-0FA1 with control module MLFB no 6SN1121-0BA11-0AA1. As per manual P95=10 i.e. motor code is ok. But on drive display,it displays motor rated power P160= 28.1 Kw; rated motor current P161=68.3A, rated motor voltage P162= 312. Why is it so?
	Last edited by: DEEPSTR2010 at: 6/27/2011 7:21 AM
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Hello

Check this informations....

611D/U	611A
P1102	P96	442		motor code number
P1103	P161	90	[A]	rated motor current
P1117	P159	0.503	[kgm²]	moment of inertia
P1130	P160	39	[kW]	rated motor power
P1132	P162	335	[V]	rated motor voltage
P1134	P164	34.2	[Hz]	rated motor frequency
P1135	P165	327	[V]	no-load motor voltage
P1136	P166	42	[A]	no-load motor current
P1137	P167	0.058	[Ohm]	stator resistance
P1138	P168	0.0385	[Ohm]	rotor resistance
P1139	P169	0.149	[Ohm]	stator leakage reactance
P1140	P170	0.154	[Ohm]	rotor leakage reactance
P1141	P171	4.37	[Ohm]	magnetizing reactance
P1142	P173	1200	[1/min]	field weakening speed
P1143	P172	1800	[1/min]	upper speed MR characteristic
P1144	P175	122	[%]	factor MR characteristic
P1145		85	[%]	stall torque reduction factor
P1146	P174	5000	[1/min]	max. motor speed
P1400	P163	1000	[1/min]	rated motor speed
P1602	P63	150	[°C]	motor overtemperature warning

Regards,
Ekalavya

6/27/2011 10:13 AM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 11/14/2024 Posts: 8092 Rating: (878)	Hello Ekalavya, Thanks for your reply. I have checked the parameters which you have mentioned. But those parameters are not matching with the motor nameplate parameters. That is why I am unable to understand. So few nameplate parameters I have mentioned in my thread. Why this is so? Hope now my question is clear.

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6/27/2011 10:25 AM	Rate (0)
Ekalavya Posts: 2964 Rating: (484)	Hello Deep, I agree the parameter what you have mentioned and what i have mentioned there difference. May be the OEM would have got some error during the commissioining of this motor and would have changed for working this motor.... Regards, Ekalavya
Ekalavya Posts: 2964 Rating: (484)
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6/27/2011 10:58 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Or the motor was changed... Best regards, Hristo Mihalev

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6/27/2011 11:50 AM	Rate (0)
PISCEAN 2010 Diamond Expert Joined: 4/23/2010 Last visit: 11/14/2024 Posts: 8092 Rating: (878)	Hello Ekalavya & UMENCHO, Thanks for your reply. The machine at present is under commissioning. I have checked the motor & from the nameplate it is confirmed that the motor MLFB no is correct one. May be, as you have pointed out, the controller may be commissioned for some other motor. Let us see what happens when power is switched ON.

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