Answer Happy

Question 4 12 pts A 3-phase, 12 Vdc brushless DC motor with integrated sensorless is shown in the following figure. Its name plate gives these details: • Rated torque: 0.32 Nm • Rate speed: 2500 RPM • No-load speed: 3200 RPM • Power: 85 W. Choose the correct statement O The motor's speed constant is K = 0.046 V/rad/s. Given the motor's linear speed-torque curve, the stall torque of the motor can be estimated at T = 1.46 Nm O Supplied by a 6-step inverter, the RMS line-to-line voltage of the Y-connected motor is estimated at Va 12 V = 2/2 = 222 = 5.405V 2.22 The RMS value of the motor's phase current is 1 = = = 7.083A Vs O The torque constant of this motor is KT = 0.45 Nm