Lsr (maximum) mutual inductance between one stator winding and one rotor winding Mrr' mutual inductance between the rotor windings, as seen from the stator side. That is, the transformation ratio between stator and rotor windings is taken into account. Lrr' self-inductance of one rotor winding, seen from the stator side. Mss mutual inductance between stator windings. We have created a wide range of electric coil data sheets to help you communicate your coil requirements to us. Lss self-inductance of one stator winding Electric Motor Coil Data Sheets Stimple and Ward are always working to improve our quality and capabilities for our customers. (Does not sound much like a squirrel cage, but seems to be OK in simulations).
RE: How to read squirrel cage induction motot data sheet ijl (Electrical) 19 Apr 06 04:44Īssume that there are three windings in the stator, and three windings in the rotor, one for each phase. May be some of the inputs in your simulation are zeros for a 3 phase motor. The total power is 3 times that per one phase. Using the equivalent circuit normally you calculate one phase and the other two are exactly the same but 120 and 240 ☎ out of phase. I am not familiar with your simulation equations but yes, the values are per phase and the resistances and reactances are the same for all three phases. TECO Electric Motors are regarded as one of the leading brands available on the market and are regularly specified and preferred amongst equipment manufacturers, constructors, engineering companies and major end-users alike. IEEE Standard 43-2000, Recommended Practice for Testing Insulation Resistance of Rotating Machines, recommends the insulation test voltage to apply, based on winding rating, and minimum acceptable values for electric motor. The easy and direct way to analyze the motor performance is by the equivalent circuit, the different states could be different slips ( eg s=0, 0.01.5 etc) or different voltages ( eg V= 1, 0.9, 0.8, etc). ELECTRIC MOTORS Insulation resistance testing is performed when troubleshooting electric motors and related equipment. The suffix 1 stands for primary (stator) and 2 for secondary (rotor), the M is for mutual. The parameters provided could be in ohms or per unit if in ohms you should match them to the voltage. The voltage applied to the input is the line to neutral. The equivalent motor circuit is per phase. Both windings are connected 2Y for 230 Volts or 1Y for 460 Volts operation. For concentric winding the turns per coil are 70 and two concentric coil per group, that is the reason for different span 1-12, 2-11. If the winding is lap the turns per coil are 41 and a fix span 1-9. The winding data you have is for two different types “LAP” and “CONCENTRIC” but they are equivalent. Thanks again RE: How to read squirrel cage induction motot data sheet davidbeach (Electrical) 17 Apr 06 18:58
Provided values in the circuit sheets are 'SLIP, I1, I2, R1, X1, R2/S, X2, XM, TOTAL R, TOTAL X, TOTAL Z, X/R RATIO' for FULL LOAD and LOCKED ROTOR.įrom these info, how can I get resistances, (self and mutual) inductances of rotor (each bar) and each phase of stator? I'm planning to give these values to the simulation of the motor.
This motor is working on 230V now.įrom the following information, what is the NUMBER OF TURNS of the stator? 41T or 70T or combination of both?Ģ) I also have an 'Equivalent circuit data (3phase 230V)' sheet for same motor as in the above. Thank you in advance.ġ) I have a data sheet for a squirrel cage incution motor, but I'm not familair with these. If anyone can help me I would appreciate an urgent responce.I'm new to electic motor, so I need some help in understanding provided specification. This motor is drawing excessive current on the 6 pole winding at full voltage no load and appears to have a transformer effect and being influenced by the 4 pole winding in some way, the delta connection on the 4 pole winding is open during the test run of the 6 pole speed.Ĭan anyone please throw some light on this subject and tell me what is the cause or possible cause? I have never come across this before in all of my years in the motor winding trade. Nameplate details are: 280/85 KW, 415 Volt, 471/158 Amps, 1480/980 RPM, 3Phase, 50 HZ, 315 Frame, Type PLS315VLG4/6B3.ħ2 Slot, 36 Coils, 4 Turns per Coil, 1-16 Coil Pitch, 2 Parallel Delta Connection, 6 Leads out, Wire Size 13 x 1.4 mm.ģ6 Coils, 3 Turns per Coil, 1-11 Coil Pitch, 1 Star Connection, Wire Size 17 x 1.4 mm. We currently have a Leroy Somer 3 phase, 2 speed, 2 winding motor which has been rewound.