A 100kW, 230V, shunt generator has an armature resistance and field resistance of 0.05Ω and 57.5Ω. If the generator operates at rated voltage. SPL is 1.8kW, a) At what load does the generator achieve maximum efficiency? b) What is the value of this maximum efficiency?

A 100kW, 230V, shunt generator has an armature resistance and field resistance of 0.05Ω and 57.5Ω. If the generator operates at rated voltage. SPL is 1.8kW, a) At what load does the generator achieve maximum efficiency? b) What is the value of this maximum efficiency?

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter54: Variable-frequency Mechanical Drives

Section: Chapter Questions

Problem 4SQ

See similar textbooks

Related questions

Q: 10. A circuit has a real power of 230 W and a reactive power of -250 VARS. Find the Apparent power…

A: Given, P = 230 W Q = -250 VAR

Q: Examine properly with the aid of diagram what transmission media is.

A: The transmission system interconnects all major generating stations and main load centers in the…

Q: *46. Perform the following operations (express your answers in rectangular form): (4 +j 3) + (6 – j…

Q: Q1: Draw the block diagram for AM/DSB-SD system uses a carrier frequency 1MHZ and pilot carrier of…

Q: What is the rated full-load current of a ¾-horsepower, 208-volt single-phase motor

A: The solution is given below

Q: D5.6. A perfectly conducting plane is located in free space at x = 4, and a uniform infinite line…

A: line charge ρL = 40 nC/m along x=6,y=3 to fond V and E at P(7,-1, 5)

Q: How do you calculate the effective resistance of a parallel circuit? (Equation)

A: Consider the resistances that are connected in parallel are, R1,R2,R3..........,RN Consider the…

Q: In a day, a household consumes 30W Light for 10 hours usage and 70W from appliances for 4 hours…

Q: Let Is = 25Z30°A, Vs = 30Z– 20°V, Z1 = 55+ j902, | R2 = 902, R3 = 852, X2 = -402, N¡ = 3, and N2 =…

Q: R R A, R, A3 ovo RG R, R2 R3 ov REF A2 + V, O

A: Please find the detailed solution in below images

Q: A 3-phase, 10 kVA, 400 V, 50 Hz Y-connected alternator supplies the rated load at 0.8 pf lagging. If…

Q: 5. Determine lc and VCE in the pnp emitter bias circuit. Assume 6pc = 150 VEE +10 V RE 470 N RB 10…

Q: (2) Implement the following circuits with only (a) 2-input NAND (b) 2-input NOR gates and inverters.…

A: According to guidelines, only the 1st 3 subparts will be solved. For the remaining parts please post…

Q: Find the equivalent closed loop transfer function for the system R(s) E(s) Y(s) 3 K s+2 10 s+10

Q: B Vin А D 1. For the circuit shown above, the PIV will occur when the input waveform is at point а.…

A: This question belongs to power electronics . It is based on the concept of PIV for a half wave…

Q: Simplify the given Boolean function (in POS) using a map. F(A,B,C,D,E) = ∑m(0,1,4,5,16,17,21,25,29

Q: Sketch the electronic symbol (schematic) for the following components/ devices. Briefly describe the…

A: For the following components, The electronic symbol and the function of the electronic component is…

Q: A. Three capacitors 15 µF, 10µF, and 5µF are connected in series with a 10 v battery. Determine: 1.…

Q: A function x with the following equation: | 2,0<x<3 (x)= -2,-3<x<0 _Period 6 Draw a symmetrical…

A: Property of symmetric waveform Amplitude of positive and negative wave will be same Duration of…

Q: Derive the flux density, D, by applying Gauss's Law: 1. Infinite Sheet Charge

A: Assuming the Gaussian surface to be a rectangular parallelopiped having an area of cross-section A.…

Q: 1. Suppose g(t) = x(t) • cos (t) and the Fourier transform of g(t) is G(jw) depicted as below. G(jw)…

Q: Determine the value of the capacitor to be connected in parallel with ZL (load) in order to correct…

A: In this question, We need to determine the value of the capacitor to be connected in parallel with…

Q: e) For the capacitor circuit shown find the voltage V3 (in V). Do not enter the unit. Enter number…

A: In this question we need to find a voltage V3 .

Q: 1. A cardiac defibrillator is used to shock a heart that is beating erratically. The capacitor is…

Q: What does the term "integrated circuit" mean?

A: An integrated circuit is also called a microchip or microelectronic circuit or simply called as a…

Q: Find V2 (volt) unit if E1=9V, E2=-5.4V, R1=4.6kN, and R2=1.9kQ. (Answer should roundoff to 2 decimal…

A: Given , We have a circuit with diode. Please find the below attachments for the clear explanation.

Q: 7. The bias voltage is set to +4.3 V. The output of the biased limiter shown will be clipped a.…

Q: + V - C 3 µF + C2 Q2 V2 |4 μΕ C3 03 V3 2 µF E = 120 V +

Q: Prove that a NOR gate is a Universal gate?

A: In this question we need to prove that a NOR gate is a Universal gate.

Q: A broadcast radio transmitter radiates 9 kilowatts when the modulation percentage is 75. how much of…

A: The carrier power can be calculated by using the general expression of transmitted power.

Q: Directions: Using the schematic below and the test results listed, which resist. Shorted resistor =…

Q: (1) Consider the circuit shown in Fig. 1, derive the expression (step by step) of the voltage…

Q: An inductor of inductance of 2 H is connected in series to a resistor of 10 2 and a 12 v battery.…

Q: 6.28 For the circuits in Fig. P6.28(a), (b), (c), and (d), assume that the transistors have very…

Q: I need handwritten otherwise i will dislike and want explanation with zero plag please in your own…

A: Given, We have two questions a and b. Please find the below attachments for the clear explanation.

Q: Sketch the transfer curve for an n-channel depletion type MOSFET with IDSS=14 mA and Vp = -5 V

Q: 1. A capacitor is rated at x farad. If its minimum nominal tolerance value is 850uF, what is the…

A: As per guidelines we are supposed to answer only 1st Question so please upload others seperately..

Q: During the positive input cycle shown, the conduction path is through diodes a. Di and D2 b. Dz and…

Q: B. Three capacitors 15 µF, 10µF, and 5µF are connected in parallel with a 10 v battery. Determine:…

A: Three capacitors C1= 15uF, C2= 10uF and C3= 5uF are connected in parallel. Battery voltage E = 10v…

Q: An input voltage of 2 Vrms (measured from base to ground) is applied to the circuit of the figure.…

A: The following circuit diagram is given:

Q: Which of the following are considered an issue with wind or solar power? a) It is not always…

A: The answer is option d) all of the above. Let's get to each option one by one.

Q: 5. Which type of DC motor should be used if constant speed is needed? series shunt induction…

A: In this question, We need to choose the correct option Which motor is used for constant speed?

Q: In an electrical installation, the active power is 500 kW and the power factor is 65% (lagging). How…

Q: a) For the capacitor circuit shown find the total capacitance CT (in pF). Do not enter the unit.…

Q: Find the following signals FT (Hint use FT pairs and FT propertise), Please write procedures (a)…

A: Given the signals as given below: a) P3(t+2)+2P2(t-1) b) te-3tu(t)+cos(3t) c) 3P4(2t)

Q: Derive the flux density, D, by applying Gauss's Law: 1. Uniformly charged sph

Q: Given a transformer (200 kVA, 60 Hz, 4600/230 volt ) R1=2.25 Ω, R2=0.005 Ω X1=13.4 Ω, X2=0.03 Ω Core…

Q: R7 Os tovo Quo The circuit in Figure 3 shows a simple multi-stage BJT op-amp, consisting of three…

A: Given: The circuit the figure below shows a simple multi-stage BJT op-amp, consisting of three…

Q: Takes 3-bit input and outputs 1 when the number of 1's in the input number is smaller than the…

A: Since you have asked multiple questions in a single request, we will be answering only the 1st…

Q: A 4 pole lap Wound DC shunt generator has 300 armature conductors an flux per pole of 0.01 Wb. It…

A: In this question we have given dc shunt generator .We have to find out terminal voltage of dc…

Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

A 100kW, 230V, shunt generator has an armature resistance and field resistance of 0.05Ω and 57.5Ω. If the generator operates at rated voltage. SPL is 1.8kW,

a) At what load does the generator achieve maximum efficiency?

b) What is the value of this maximum efficiency?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Given

VIEW

Solution step 1

VIEW

Step 2

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Calculate the efficiency of a 200-V, 100-kW shunt generator if the resistance of the armature and shunt respectively are 0.005 ohm and 20 ohms. The friction, windage and iron losses together amount to 3,000 W.
A Four pole, 50kW, 250 Volt Long Shunt DC Machine Generator has a shunt field current of 1.5 A. It is Lap-winded with 872 conductors, and a rated speed of 1200 RPM. Solve for the following: Mechanical, Electrical and Commercial Efficiency when the Stray Loss is 1600 W Total Copper Loss
A 30 kW, 300 V , 4- pole lap series generator has 160 conductors and the resistance of each conductor is 0.005 Ω if mechanical efficiency is 95% and electrical efficiency is 95.45% Find: a- The losses in armature resistance. b- The resistance of series field. c-rotational losses
A 220V shunt generator has armature resistance of 0.2 ohms and a shunt resistance of 44 ohms. At rated load, the driving engine develops 62.5HP. if the iron and friction losses amount 1600W, how much is the current delivered to the load at rated condition?
A 25 kW, 200 V compound generator has an armature, series field, interpole, compensating and shunt field resistance of 0.03 ohm, 0.04 ohm, 0.05 ohm, 0.02 ohm and 50 ohms respectively. If the iron and friction losses is 655 W. Assume 1 V per brush contact drop. Find (a) Generated power by the armature. (b) Electrical efficiency (c) Mechanical efficiency (d) Over all efficiency
A 30kW generator has an armature resistance of 0.45 ohms, generates a terminal voltage of 225 V at full load. Neglect field current and field copper loss. Iron and mechanical losses are 2.4kW. What will be the efficiency of the generator?
A 220V series generator has an armature resistance of 0.4ohms. If the generated emf is 230V and the drop across the series field winding is 8V, what is the value of armature current (in amp)?
A 25kW, 250V DC shunt generator has armature and field resistances of 0.06 ohm and 100 ohm respectively. Determine the total armature power developed when working (i) as a generator delivering 25kW output and (ii) as a motor taking 25kW.
A 18 kW shunt generator having an armature circuit resistance of 0.5 ohm and a fieldresistance of 125 ohm, generates a terminal voltage of 250 V at full load with a brushloss of 1 V per brush. Assuming the iron, friction and windage losses amount to 1.5kW. Determine the efficiency of the generator. (Show all calculations of Currents,Emf, Powers, Power losses, ext.)
ANSWER THE PROBLEM, ILLUSTRATE THE CIRCUIT AND ANSWERS MUST BE IN 2 DECIMAL PLACES. A long shunt generator running at 1000 RPM supplies 20 kW at a terminal voltage of 220 V. The resistance of armature, shunt field, and series field are 0.04, 110 and 0.05 ohm respectively. The overall efficiency at the above load is 85%. Find: the total Copper loss, SPL, and the torque developed by the prime mover.
The dc shunt generator is connected to a load that draws 28,800 watts, given the armature and shunt field resistance of 0.04 ohm and 48 ohms respectively. If the power delivered in the armature is 106.3 % of the power delivered to the load. Calculate the generated e.m.f. of the generator. A: 242.97 V
An A 20kW DC shunt generator having an armature circuit resistance of 0.8Ω and a field resistance of 140 Ω, generates a terminal voltage of 230V at full load. Determine the total iron, friction and windage losses if the efficiency of the generator at full load= 83%.