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Consider the two-phase motor of Example 9.3. a. Find the startin The equivalent-circuit parameters of an 8-kW, 230-V, 60-Hz, four-pole, two-phase, squirrel-cage induction motor in ohms per phase are Rl = 0.253 Xl = 1.14 Xm = 32.7 R2 = 0.446 X2 = 1.30. This motor is operated from an unbalanced two-phase, 60-Hz source whose […]

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Consider the rectifier system of Example 10.5. Write a MATLAB Consider the rectifier system of Example 10.5. Write a MATLAB script to plot the ripple voltage as a function of filter capacitance as the filter capacitance is varied over the range 3000ÂľF < c=””>< 105Âľf.=”” assume=”” the=”” diode=”” to=”” be=”” ideal.=”” use=”” a=”” log-scale=”” for=”” […]

Consider the half-wave SCR rectifier circuit of Figure supplied Consider the half-wave SCR rectifier circuit of Figure supplied from the triangular voltage source of Figure. Assuming the SCR to be ideal, calculate the rms resistor voltage as a function of the firing-delay time td (0 < td=””> Is this the question you were looking for? […]

Consider the half-wave, phase-controlled rectifier system of Consider the half-wave, phase-controlled rectifier system of Figure. This is essentially the same circuit as that of Problem 10.8 with the exception that diode D1 of Figure has been replaced by an SCR, which you can consider to be ideal. Let R = 5O and Vs (t) = […]

Consider the plunger actuator of figure. Assume that the plunger Consider the plunger actuator of figure. Assume that the plunger is initially fully opened (g = 2.25 cm) and that a battery is used to supply a current of 2.5 A to the winding. a. If the plunger is constrained to move very slowly (i.e., […]

Consider a 500-kW, 2300-V, 50-Hz, eight-pole synchronous motor w Consider a 500-kW, 2300-V, 50-Hz, eight-pole synchronous motor with a synchronous reactance of 1.18 per unit and AFNL = 94 A. It is to be operated under field-oriented torque control using the unity-power-factor algorithm described in the text following Example 11.8. It will be used to […]

A salient-pole synchronous generator with saturated Xd = 1.57 A salient-pole synchronous generator with saturated synchronous reactances Xd = 1.57 per unit and Xq = 1.34 per unit is connected to an infinite bus of rated voltage through an external impedance X bus = 0.11 per unit. The generator is supplying its rated MVA at […]

b. Calculate the no-load rotational loss. c. The motor is suppli b. Calculate the no-load rotational loss. c. The motor is supplied from a 30-V dc supply through a PWM inverter. Table gives the measured motor current as a function of the PWM duty cycle D. Complete the table by calculating the motor speed and […]

A dc-motor shunt field winding of resistance 210Ω is to be A dc-motor shunt field winding of resistance 210東 is to be supplied from a 220-V rms, 50-Hz, three-phase source through a three-phase, phase controlled rectifier. Calculate the delay angle 杰d which will result in a field current of 1.1 A. Is this the question […]