- 5hp 4 Poles 220v Three Phase 60hz Design B Y Connected Induction Motor Rated Current Of This Motor Is 13 1a The 1 (133.26 KiB) Viewed 31 times
5hp ,4-poles, 220V, three phase ,60Hz, Design B, Y-connected induction motor, rated current of this motor is 13.1A. The DC test, no load test and locked rotor test were found in the following interval values. DC test: No-load test: Locked-rotor test Voc E(12.5, 13.8)V VT.nl =220V VTLR E(22.5, 23.5)V Ipc E(12.5, 13)A IA E(3.5, 3.85) A IA E(11.5, 13) A Is (3.5, 3.85) A 18 E(11.5, 13) A Ic E(3.5, 3.85)A Ic E(11.5, 13) A f=60Hz fE(12, 18) Hz Pin =P1+P2 E(180,220)W P. =P,+P2 E(450, 469)W ** Every student should randomly select the values of the induction machine tests from inside the given intervals. Then answer the following questions using your selected values. The numbers that any student must choose differ from his classmate in at least two numbers DC test: No-load test: Locked-rotor test Vpc =. Vrur. Ibc = IA IA IB IB Ic= Ic f=60Hz Pin=P,+P2=....... Pin=P,+P2=.......... VT.nl 1) Sketch the experimental circuits of DC test, No-load test and locked-rotor test. 2) Determine R1, X1, R2, X, and Xm, and then sketch per phase equivalent circuit for this motor. 3) Determine line current (IL) and mechanical speed (nm) at a slip 3%. 4) Determine Pin, Pscl, PreL ,Prot,PAG Pcony and Pour at a slip 3%. 5) Determine induced torque (Tin), output torque(Tout) and efficiency (n) at a slip 3% 6) If the load torque of the motor reduced to half rated torque, what is the phase voltage require to keeping the motor at rated speed. 7) Determine maximum torque (tmax), slip at maximum torque ,starting torque (tstart).