the load current of a DC generator has been increased twice. does it affect it's output...
the load current of a DC generator has been increased twice. does it affect it's output voltage
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the load current of a DC generator has been increased
twice. does it affect it's output...
A second separately excited DC generator has the same electrical parameters as the generator in part...
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
Question 8 10 points Save Answer A DC generator has a no-load output voltage of 133...
Question 8 10 points Save Answer A DC generator has a no-load output voltage of 133 V. its armature circuit resistance is 0.943 ohm and its field coils are separately energized. If the load is rated 3.42 kW at 103.1 V. Neglecting the effect of armature reaction, what power could be delivered to the load?
A DC shunt generator delivers a load current of 50 A at 300 V with its...
A DC shunt generator delivers a load current of 50 A at 300 V with its field circuit resistance being 50 ohms. The armature circuit resistance of the generator is 2 ohms The generator has a linear excitation with a constant rotor speed. The brush voltage drop is negligible. Aiding with a drawing of equivalent circuit, estimate: i) The field current, armature current and generated voltage of the generator when it delivers the 100 A at 300V; and (ii) The...
A separately excited DC shunt generator produces a no-load voltage of 150 Vdc at 1200 RPM....
A separately excited DC shunt generator produces a no-load voltage of 150 Vdc at 1200 RPM. If the armature resistance is 3 Ohms, calculate the output voltage under the following conditions: (Note all calculations for each problem are to be performed from the base values given above). a) The speed is reduced to 875 RPM. Vout = __________________ b) The field current is increased by 22% (assume a linear field current/flux relationship). Vout = __________________ c) The speed is increased...
true or false with explanation a- A separately excited DC generator terminal current increases as a...
true or false with explanation a- A separately excited DC generator terminal current increases as a resistive load is applied b- In a separately excited DC generator, a voltage will exist at the terminals for a zero speed c- Doubling the load on the generator will increase the generator voltage by a factor of two. d- The commutator is used for adding a resistor to the rotor. e- A rotating magnetic field is produced around the air gap.
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC...
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC GENERATOR REVIEW QUESTIONS: 1. A separately excited generator has constant: a Field Strength b Load Current c Terminal Voltage The terminal voltage of a separately-excited generator a Goes up as load increases b Goes down as load increases C Stays the same as load increases. 3. The current drawn from a separately-excited generator by the load a is also its armature current b Has...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bi...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
separately excited series, shunt, compound DC motor: *Describe how does decreasing the field current IF affect...
separately excited series, shunt, compound DC motor: *Describe how does decreasing the field current IF affect the speed versus voltage characteristic and constant K1 of a separately-excited dc motor. K1=(n2-n1)/(E2-E1) *Describe how does decreasing the field current IF affect the torque versus current characteristic and constant K2 of a separately-excited dc motor? k2=(T2-T1)/(I1-I2) *Briefly describe how the speed varies as the mechanical load applied to the series motor increases, i.e. as the motor torque increases.
Does the change in the dc motor field current mainly affect the real or reactive power...
Does the change in the dc motor field current mainly affect the real or reactive power delivered by the synchronous generator? Explain.
Two dc generators (A) and (B) with the following characteristics: Generator (A): rated voltage = 150...
Two dc generators (A) and (B) with the following characteristics: Generator (A): rated voltage = 150 V, rated current = 30 Amp, and armature resistance = 0.4 Ω. Generator (B): no-load voltage = 160 V, rated current = 20 Amp, and armature resistance = 0.6 Ω. are connected in parallel. Find: a) Circulating no-load current and terminal voltage. b) The load current when generator B floating. c) The maximum possible load power.
A second separately excited DC generator has the same electrical
parameters as the generator in part (a) first but does not have
compensating windings. The full-load demagnetising armature
reaction is equivalent to 500 Ampere-turns. (i) With Radj = 63Ω and
the generator is driven at 1600rpm, what is the no-load terminal
voltage? (ii) What would be the output terminal voltage if 364A
were drawn from the armature at 1600rpm?
Q2. (a) Fig. Q20) shows a separately excited DC generator with...
Question 8 10 points Save Answer A DC generator has a no-load output voltage of 133 V. its armature circuit resistance is 0.943 ohm and its field coils are separately energized. If the load is rated 3.42 kW at 103.1 V. Neglecting the effect of armature reaction, what power could be delivered to the load?
A DC shunt generator delivers a load current of 50 A at 300 V with its field circuit resistance being 50 ohms. The armature circuit resistance of the generator is 2 ohms The generator has a linear excitation with a constant rotor speed. The brush voltage drop is negligible. Aiding with a drawing of equivalent circuit, estimate: i) The field current, armature current and generated voltage of the generator when it delivers the 100 A at 300V; and (ii) The...
LAB MANUAL LAB EXPERIMENT - 04: LOAD CHARACTERISTICS OF SEPARATELY EXCITED DC GE ATELY EXCITED DC GENERATOR REVIEW QUESTIONS: 1. A separately excited generator has constant: a Field Strength b Load Current c Terminal Voltage The terminal voltage of a separately-excited generator a Goes up as load increases b Goes down as load increases C Stays the same as load increases. 3. The current drawn from a separately-excited generator by the load a is also its armature current b Has...
bridge oad DC DC Vload DC For a single-phase DC-AC inverter with an RL load at the output. It is switching using the bipolar SPWM method with the desired fundamental frequency of 400 Hz and the switching frequency of 20.4 kHz. Here the modulation index is 0.6, input DC is 200 V, load R-5 Ω and L 2 mH a. What's the RMS value of the fundamental component of the output voltage across RL? b. What's the RMS value of...
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