question archive A 3-phae star-connected PMSMRating: are as follows: 2

A 3-phae star-connected PMSMRating: are as follows: 2

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A 3-phae star-connected PMSMRating: are as follows: 2.5 kW, 9.2 A, 2500 rpm, 9.55 N.m,

Parameters: 6-pole, Rs= 0.5 Ω, Ld=3 mH, Lq=9 mH, B=9.36×10-4 N.m/(rad/s) , J=0.01 kg.m2, emf constant KΦ=0.0669 V/rpm, inverter input voltage =300 V DC.

(i) Determine the maximum speed of the PMSM drive system. (Solve this problem using p.u values)

(ii) Without exceeding the stator rated current and the inverter input voltage, what is the maximum speed at which the rated power is delivered? (the stator resistance drop can be neglected in the calculation for this question, and the maximum stator phase peak voltage obtained through the inverter is 50% of the DC-link voltage).

pur-new-sol

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