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a. Calculate the rated armature current of this motor. What a. Calculate the rated armature current of this motor. What is the corresponding mechanical tor Figure shows in schematic form an electrostatic voltmeter, a capacitive system consisting of a fixed electrode and a moveable electrode. The moveable electrode is connected to a vane which rotates […]

a. Calculate the rated armature current of this motor. What a. Calculate the rated armature current of this motor. What is the corresponding mechanical torque in N 路 m? b. The current source supplies a current of 6.2 A to the motor armature, and the motor speed is measured to be 2670 r/min. Calculate the […]

A two-phase linear permanent-magnet synchronous motor has an air A two-phase linear permanent-magnet synchronous motor has an air-gap of length 1.0 mm, a wavelength of 12 cm, and a pole width of 4 cm. The rotor is 5 wavelengths in length. The permanent magnets on the rotor are arranged to produce an air-gap magnetic flux […]

a. Calculate the field current required to achieve operation a. Calculate the field current required to achieve operation at 15.2 N 路 m torque and 1800 r/min. Calculate the corresponding PWM duty cycle D. b. Calculate the field current required to achieve operation at 15.2 N 路 m torque and 1500 r/min. Calculate the corresponding […]

A voltage-source H-bridge inverter is used to produce the A voltage-source H-bridge inverter is used to produce the stepped waveform v (t) shown in Figure. For V0 = 50 V, T = 10 msec and D = 0.3: a. Using Fourier analysis, find the amplitude of the fundamental time harmonic component of v (t). b. […]

A two-pole, 60-Hz three-phase laboratory-size synchronous A two-pole, 60-Hz three-phase laboratory-size synchronous generator has a rotor radius of 5.71 cm, a rotor length of 18.0 cm, and an air-gap length of 0.25 mm. The rotor field winding consists of 264 turns with a winding factor of kr = 0.95. The Y-connected armature winding consists of […]

For a synchronous machine with constant synch For a synchronous machine with constant synchronous reactance Xs operating at a constant terminal voltage Vt and a constant excitation voltage Eaf, show that the locus of the tip of the armature-current phasor is a circle. On a phasor diagram with terminal voltage shown as the reference phasor, […]

A transformer is to be used to transform the impedance A transformer is to be used to transform the impedance of a 8-Ω resistor to an impedance of 75 ft. Calculate the required turns ratio, assuming the transformer to be ideal. Is this the question you were looking for? If so, place your order here […]

A squirrel-cage induction motor runs at a full-load slip of A squirrel-cage induction motor runs at a full-load slip of 3.7 percent. The rotor current at starting is 6.0 times the rotor current at full load. The rotor resistance and inductance is independent of rotor frequency and rotational losses, stray-load losses and stator resistance may […]

A two-phase permanent-magnet ac motor has a rated speed of A two-phase permanent-magnet ac motor has a rated speed of 3000 r/min and a six-pole rotor. Calculate the frequency (in Hz) of the armature voltage required to operate at this speed. Is this the question you were looking for? If so, place your order here […]