A 3-phase, 4-pole permanent-magnet brushless DC motor is star-connected and supplied by a 6-step inverter as shown below

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A 3 Phase 4 Pole Permanent Magnet Brushless Dc Motor Is Star Connected And Supplied By A 6 Step Inverter As Shown Below 1 (149.38 KiB) Viewed 49 times

A 3-phase, 4-pole permanent-magnet brushless DC motor is star-connected and supplied by a 6-step inverter as shown below. The line to neutral emf Ea is measured at 36 V rms at 1000 rpm at no load. The stator winding resistance and inductance per phase are respectively 10 2 and 1 mH. Which of the following is INCORRECT? P AC motor n Va de اله و اله و اله S وS S₁ a b إله S 8 C 8 اله S N O The torque constant kr (in T=kTla) is estimated at 1.03 Nm/A. o The DC supply voltage Vd is estimated at 46 V from the Fourier analysis of the 6- step phase voltages O The phase current in the rotor-locked case la,lk (at wr=0) is estimated at 3.6 A. O The DC supply voltage Vd is estimated at 80 V from the Fourier analysis of the line voltage. O The emf constant ke (in E₂= kEwr) is estimated at 0.344 V/rad/s