An induction motor which specification tabulated in Table Q2 is identified as a potential machine to be used for a conveyor system in a small manufacturing company. Table Q2 3-phase ouput power (W) 3-phase supply (V) Pole number, P Supply frequency (Hz) Connection type Per phase stator resistance, R1 (Q) Per phase stator inductance, X¡ (Q) Per phase magnetizing inductance, XM (N) | Per phase rotor inductance, X2 (N) 750 415 4 50 Y 0.25 0.4 15 0.4 The motor develops its full-load induced torque at a slip of 0.05 when operating at 50HZ and 415V. If the core loss, Pcore, mechanical loss, Pr&w and stray loss, Pmisc are negligible, determine the following: i) Rotor resistance, R2. (Hint: use Thevenin equivalent approach) ii) Maximum slip, Smax - iii) Maximum torque, Tmax - iv) Rotor speed, wm at maximum torque condition. v) Starting torque, Tstart ·

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b)
An induction motor which specification tabulated in Table Q2 is identified as a potential
machine to be used for a conveyor system in a small manufacturing company.
Table Q2
3-phase ouput power (W)
3-phase supply (V)
Pole number, P
750
415
4
Supply frequency (Hz)
Connection type
Per phase stator resistance, Ri (Q)
Per phase stator inductance, X, (Q)
Per phase magnetizing inductance, XM (Q)
Per phase rotor inductance, X2 (2)
50
Y
0.25
0.4
15
0.4
The motor develops its full-load induced torque at a slip of 0.05 when operating at 50HZ
and 415V. If the core loss, Pcores mechanical loss, Pr&w and stray loss, Pmisc are
negligible, determine the following:
i) Rotor resistance, R2. (Hint: use Thevenin equivalent approach)
ii) Maximum slip, Smax -
iii) Maximum torque, Tmax .
iv) Rotor speed, @m at maximum torque condition.
v) Starting torque, Tstart .
Transcribed Image Text:b) An induction motor which specification tabulated in Table Q2 is identified as a potential machine to be used for a conveyor system in a small manufacturing company. Table Q2 3-phase ouput power (W) 3-phase supply (V) Pole number, P 750 415 4 Supply frequency (Hz) Connection type Per phase stator resistance, Ri (Q) Per phase stator inductance, X, (Q) Per phase magnetizing inductance, XM (Q) Per phase rotor inductance, X2 (2) 50 Y 0.25 0.4 15 0.4 The motor develops its full-load induced torque at a slip of 0.05 when operating at 50HZ and 415V. If the core loss, Pcores mechanical loss, Pr&w and stray loss, Pmisc are negligible, determine the following: i) Rotor resistance, R2. (Hint: use Thevenin equivalent approach) ii) Maximum slip, Smax - iii) Maximum torque, Tmax . iv) Rotor speed, @m at maximum torque condition. v) Starting torque, Tstart .
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