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Question 5 5 points A motor draws 450 mA current from a de power supply. It...
A 6 hp, 180 V shunt dc motor draws a full-load current of 30 A from the power supply. The motor h...
A 6 hp, 180 V shunt dc motor draws a full-load current of 30 A from the power supply. The motor has a field (shunt) resistance of 150 Ω. The armature resistance of the motor is 0.1 Ω. When the motor speed is 1800 rpm (this is not the full-load speed), the relationship between the induced voltage
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of th...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of the Week 10 Practical, when the load on the motor increases the voltage across the motor and the current through the motor Under this higher load the lifting speed and the motor torque QUESTION5 If the power supply is set to 5 V and a...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of the Week 10 Practical, when the load on the motor increases the voltage across the motor and the current through the motor Under this higher load the lifting speed and the motor torque QUESTION5 If the power supply is set to 5 V and a...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de supply The ac generator is connected to a 460 V, fixed-voltage, fixed-frequency, three-phase supply. The synchronous reactance of the synchronous generator is 513 Ω/phase. The armature resistance of the de motor is 30 m2. The 4-pole de machine is rated 30 kW at 230 V. All unspecified losses are to be...
A motor attached to a 120 V/60 Hz power line draws an 7.50 A current. Its...
A motor attached to a 120 V/60 Hz power line draws an 7.50 A current. Its average energy dissipation is 840 W. Part APart complete What is the power factor? 0.933 Part B complete What is the rms resistor voltage? 112 V Part C What is the motor's resistance? nothing ΩΩ Request Answer Part D How much series capacitance needs to be added to increase the power factor to 1.0? nothing μF
We have an amplifier that draws 2A from a 15-V dc power supply. The input signal...
We have an amplifier that draws 2A from a 15-V dc power supply. The input signal current is 1mA rms, and the input resistance is 2 k ohm. The amplifier delivers 12V rms to an 8 ohm load. Determine the power dissipated in the amplifier and the efficiency of the amplifier.
Suppose a motor connected to a 135 V source draws 21.5 A when it first starts....
Suppose a motor connected to a 135 V source draws 21.5 A when it first starts. (a) What is its resistance (in Ω)? Answer in Ω. (b) What current (in A) does it draw at its normal operating speed when it develops a 100 V back emf? Answer in A. (c) What is the voltage output (in V) of a transformer used for rechargeable flashlight batteries, if its primary has 525 turns, its secondary 8 turns, and the input voltage...
An RC series circuit draws 345 mA of current from a 90V, 60Hz source. The real...
An RC series circuit draws 345 mA of current from a 90V, 60Hz source. The real power dissipated in the circuit is 15.2 W. Determine the size of the resistor and the size of the capacitor being used. Draw the impedance triangle, the power triangle and the phasor diagram.
A PlayStation draws a current of 140 mA at 120 V. How much power (in W)...
A PlayStation draws a current of 140 mA at 120 V. How much power (in W) does the device require? w
Question # 2(25 points) A three phase, 200 hp, 2400 V, 60 Hz, 4 pole, Y connected synchronous mot...
Question # 2(25 points) A three phase, 200 hp, 2400 V, 60 Hz, 4 pole, Y connected synchronous motor has a reactance of 12 Ω phase and a negligible armature resistance. The motor draws 150 KW at a power angle of-18 Determine a) The synchronous speed of the motor in rpm. (3 points) b) The excitation voltage E. (5 points) c) The line current. (5 points) d) The motor power factor. (3 points) e) The pull-out torque (maximum torque). (3...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of the Week 10 Practical, when the load on the motor increases the voltage across the motor and the current through the motor Under this higher load the lifting speed and the motor torque QUESTION5 If the power supply is set to 5 V and a...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of the Week 10 Practical, when the load on the motor increases the voltage across the motor and the current through the motor Under this higher load the lifting speed and the motor torque QUESTION5 If the power supply is set to 5 V and a...
2.3 (20 points) A separately-excited de motor is mechanically coupled to a three-phase, 4-pole, 30-kVA, 460-V, round-rotor synchronous generator. The de motor is connected to a constant 230-V de supply The ac generator is connected to a 460 V, fixed-voltage, fixed-frequency, three-phase supply. The synchronous reactance of the synchronous generator is 513 Ω/phase. The armature resistance of the de motor is 30 m2. The 4-pole de machine is rated 30 kW at 230 V. All unspecified losses are to be...
A PlayStation draws a current of 140 mA at 120 V. How much power (in W) does the device require? w
Question # 2(25 points) A three phase, 200 hp, 2400 V, 60 Hz, 4 pole, Y connected synchronous motor has a reactance of 12 Ω phase and a negligible armature resistance. The motor draws 150 KW at a power angle of-18 Determine a) The synchronous speed of the motor in rpm. (3 points) b) The excitation voltage E. (5 points) c) The line current. (5 points) d) The motor power factor. (3 points) e) The pull-out torque (maximum torque). (3...
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