The power triangle shown represents the characteristics of a 230 V 60 Hz ac motor. How much capacitive reactive power is needed to improve the power factor to 0.90 lagging. S= Q= 4 P = 1000W 60° Qneed = units

The power triangle shown represents the characteristics of a 230 V 60 Hz ac motor. How much capacitive reactive power is needed to improve the power factor to 0.90 lagging. S= Q= 4 P = 1000W 60° Qneed = units

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

See similar textbooks

Related questions

Q: C. Draw a general sine wave V vs t and I vs t plot for a purely resistive and a purely inductive…

Q: Harmonic Frequency 50 Hz 250 Hz 350 Hz 450 Hz Current Amplitude 5A 2.1 A 1.5 A 0.8 A The current…

A: Given,

Q: power triangle shown below represents the characteristics of a 230 V 60 Hz ac motor. How much…

Q: An alternating f.e.m generator has an effective value of 2000 V and a frequency of f=100 Hz. Find…

A: An alternator f.e.m generator has,The effective voltage of the generator, .The frequency of the…

Q: A generator uses a coil that has 105 turns and a 0.700-T magnetic field. The frequency of this…

Q: A pump station uses an induction motor that requires a complex power of S1 = 55<30° kVAand a…

Q: power triangle shown beloe represents the characteristics of a 230 V 60 Hz ac motor. Determine the…

Q: Problem 54: Express the following phasor currents and voltages as sine waves for f = 60 Hz. Notice…

Q: A 60 Hz alternator stator is wye connected with each phase winding having 24 turns of wire. The…

A: f=60HzT=24 turnsϕ=0.103 weber

Q: 1. Sinewave A lags sinewave B by 30°. Both have peak values of 15V. Sinewave A is the reference with…

Q: Phasor A: magnitude 10, angle 45° Phasor B: magnitude 10, angle -45° A

A: Given, Two magnitudes with angles , We have to draw the phasors. Please find the below attachment…

Q: Question A single-phase half wave ac voltage controller has a resistive load R = 10 ohm and input…

A: Given- A single-phase half wave ac voltage controller, Resistive load R=10 ohm, Input voltage Vs=180…

Concept explainers

Multistage Amplifier

The multistage amplifier is generally a voltage or power amplifier. The multistage amplifier has a number of single stage amplifier that are cascaded together. Since a single stage amplifier output is not useful, they are being replaced with multistage amplifiers or multistage transistor amplifiers. The multistage amplifier are used where the gain required is high or the input signal is very small such that only a single stage amplifier cannot amplify it.

Question

The power triangle shown represents the characteristics of a 230 V 60 Hz ac motor. How much capacitive
reactive power is needed to improve the power factor to 0.90 lagging.
S=
60°
Qneed =
P = 1000W
Q=
units

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

Step 1: To improve the power factor of a system

VIEW

Step 2: Calculate capacitive reactive power

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 5 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

Suppose we have an ac current flowing through a coil wound on an iron core. Name two mechanisms by which energy is converted to heat in the core material. For each, how is the core material selected to minimize the power loss? How does each power loss depend on the frequency of the ac current?
A three-phase, 4-pole alternator runs at 1,800 RPM. Each phase covers two slots under each pole. The full pitch armature coils have 4 turns per coil and there are 2 coil sides per slot. The flux/pole is 6,000 kilolines distributed sinusoidally. (a) What is the distribution factor? (b) Determine the emf per phase. Ans. 0.966; 494V
(c) (iv) A separately excited DC generator is rated at 172 kW, 430 V, 400 A and 1800 rpm. Its magnetization curve is shown in Figure Q4(c). The generator's characteristics are: RA= 0.05 RF = 2002 Radj = 0 to 300 (i) (iii) VF = 430 V NF = 1000 turns per pole Sketch an equivalent circuit of the generator with proper labels. If Radj = 63 N, and the prime mover is driving at 1500 rpm, calculate the generators' no-load terminal voltage. Calculate the terminal voltage if a 360 A load is connected to its terminal. Assuming the generator does not have compensating winding. Its armature reaction at this load is 450 A. turns. The prime mover is driving at 1500 rpm. For Q4(c)(iii), the terminal voltage is lower than no-load terminal voltage calculated from Q4(c)(ii). Investigate the adjustment of field current, IF and Radj to raise for the terminal voltage to match the no-load terminal voltage. |
Question -9b
A 6-pole ,3 phase , 60 cycle alternator has 12 slots per pole and four conductor per slot. The winding is 5/6 pitch. There are 2,500,000 Maxwell ( 0.025 weber ) entering the armature from each north pole, and this flux sinusoidally distributed along the air gap. The armature coils are all connected in series , The winding is wye connected. Determine the open circuit emf of the alternator.
A 3 phase AC induction motor is operating at no load. What is the power factor? Group of answer choices A) leading B) lagging C) neither leading nor lagging
Answer is 2.93 hz. Take No. Of poles = 2.
Induction motors and welding transformers require magnetizing current, which causes a. lagging power factor. b. leading power factor. c. unity power factor. d. zero power factor.
The frequency of rotor current in an induction motor is slip times the frequency of stator current. slip times the frequency of supply, One by slip times the frequency of stator current. One by slip times the frequency of supply
A 6 pole wave wound d.c. shunt generator has 500 conductors. A generator delivers 50 kW of power at 250 voltage at full load. The resistance of the field circuit is 125 2. Actual brush shift is 10°. Then find the demagnetizing and cross magnetizing ampere turns per pole and how many additional turns must be wound on each pole to eliminate the demagnetizing effect.
A 40kW induction motor with a lagging power factor of 0.76 is supplied by a 120Vrms 60Hz sinusoidal voltage source. find the capacitance needed in parallel with the motor to raise the power factor to (a) 0.9 lagging and (b) 1.0
A Three-phase four-pole AC machine has 60 coils in the stator and each coil has 100 turns. The coils are place in 60 uniformly distributed slots around the inner perimeter of the stator. The coil is also short-pitched (eg spam of two sides of one coil is 13 slots, less than the pole-pitch). The distribution factor of the phase winding is 0.9566 and the short pitch factor is 0.97814. What is the winding factor of the phase winding, and the effective number of turns for each phasewinding.