An ac electric motor drives a dc electric voltage generator. If the motor operates a an...
An ac electric motor drives a dc electric voltage generator. If the motor operates a an efficiency of 90% and the generator at an efficiency of 80%, and if the input power to the motor is 5 kW, what is the output power of the generator?
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An ac electric motor drives a dc electric voltage generator. If
the motor operates a an...
A. A three-phase ac induction motor drives a mechanical load. The motor's terminal voltage is 470V,...
A. A three-phase ac induction motor drives a mechanical load. The motor's terminal voltage is 470V, 60 Hz. The motor's line current is 175 A, and the power factor is 0.85 lagging The motor's output power is 140 hp and the motor rotates at a speed of 1735 rpm. The motor's copper and core losses total 8.5 kW combined 1. Determine the number of poles of this motor 2. Determine the motor's shaft torque (N-m). 3. Determine the motor's rotational...
Terry owns an electric vehicle that uses a 273 V DC electric motor. When Terry drives...
Terry owns an electric vehicle that uses a 273 V DC electric motor. When Terry drives his vehicle on a 3.4 hour trip, the power used by the motor is a constant 16.7 kW. If the power company charges Terry $0.12 per kWh, what is his total electric energy cost for the trip? During the trip, what is the current used by the engine?
An armature-controlled dc motor operates at steady state, with an armature drive voltage va = 10 ...
An armature-controlled dc motor operates at steady state, with an armature drive voltage va = 10 V. The motor runs at 600 rpm, and the armature current is found to be ia = 0.2 A. The armature resistance is Ra = 15 Ω. Determine: (a) The torque constant km of the motor (b) Electrical damping constant be (c) The efficiency under the given operating conditions, if the mechanical damping constant is bm = 8.25 × 10−5 N ⋅ m/rad/s (d)...
A separately excited DC motor is fed from a variable DC source and it drives a...
A separately excited DC motor is fed from a variable DC source and it drives a variable mechanical load as shown in Figure Q4b. The excitation current If is held constant during the motor operation. (i) How can the motor direction be reversed? (4 marks) (ii) Explain what will happen to the current Ia, the internal voltage Eg, and speed if the mechanical torque increases whilst the DC input voltage VT is held constant. (4 marks) (iii)Explain what will happen...
If an AC induction motor says in nameplate that the power is 100 HP, and it...
If an AC induction motor says in nameplate that the power is 100 HP, and it has an efficiency of 88%. It is operating at a 90% of full load. What is the input kW to the motor?
A 3 phase Y connected AC motor operates on 460V, line voltage, and draws 10.0 amps,...
A 3 phase Y connected AC motor operates on 460V, line voltage, and draws 10.0 amps, line current. If the motor produces 10.0 hp at 3500 RPM, answer the following: a. What is the motor efficiency? b. How much power is lost to heat? c. What is the running torque of the motor?
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...
Q4. Most electronic systems need a dc voltage to work properly. The AC-to-DC power supply system ...
part g
Q4. Most electronic systems need a dc voltage to work properly. The AC-to-DC power supply system is including a transformer, a rectifier and a capacitor input filter. The AC input voltage is 110 Vrms at 60 Hz. (a) Draw the full wave bridge rectifier circuit with transformer which steps down voltage to safer and lower levels that are more suitable for use with diodes (b) Show how the capacitor input filter connects to the rectifier output in the...
onsider a DC electric motor. Assume the armature inductance is negligible. Consider the harmature voltage ea...
onsider a DC electric motor. Assume the armature inductance is negligible. Consider the harmature voltage ea as the input and the angular displacement @t) as the ulput. By measuring an input and the system's response as functions of time, the transfer function is then found to be 10s(s +1) What are the motor time-constant and the motor gain? a. b. iIt the input is 2 u(l), find the output i.e. the angular displacement et) c. Find the angular speed o(t)
The output torque of a motor is 69.2 lb-ft when it operates at 950 rpm. Calculate...
The output torque of a motor is 69.2 lb-ft when it operates at 950 rpm. Calculate the losses in the machine and its efficiency if, under this condition, the power input is 10900 watts. Topic: DC MOTOR: Efficiency and Power Losses
A. A three-phase ac induction motor drives a mechanical load. The motor's terminal voltage is 470V, 60 Hz. The motor's line current is 175 A, and the power factor is 0.85 lagging The motor's output power is 140 hp and the motor rotates at a speed of 1735 rpm. The motor's copper and core losses total 8.5 kW combined 1. Determine the number of poles of this motor 2. Determine the motor's shaft torque (N-m). 3. Determine the motor's rotational...
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...
part g
Q4. Most electronic systems need a dc voltage to work properly. The AC-to-DC power supply system is including a transformer, a rectifier and a capacitor input filter. The AC input voltage is 110 Vrms at 60 Hz. (a) Draw the full wave bridge rectifier circuit with transformer which steps down voltage to safer and lower levels that are more suitable for use with diodes (b) Show how the capacitor input filter connects to the rectifier output in the...
onsider a DC electric motor. Assume the armature inductance is negligible. Consider the harmature voltage ea as the input and the angular displacement @t) as the ulput. By measuring an input and the system's response as functions of time, the transfer function is then found to be 10s(s +1) What are the motor time-constant and the motor gain? a. b. iIt the input is 2 u(l), find the output i.e. the angular displacement et) c. Find the angular speed o(t)
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