Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 22, Problem 2SQ
To determine
Analyze the effect in the circuit (Figure 22-2), when the motor is operated by coil “M” becomes overheated.
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53. A 200 W, 230 V, 50 Hz capacitor-start mo-
tor has the following winding parameters:
Main winding: R = 4·5 Q2 ; X₁ = 3·7 Q
What should be the angle between input
voltage and starting winding current to give
maximum starting torque?
(1) 38.2⁰
(iii) 50-4⁰
(ii) 24-6°
(iv) 32.7°
Find the number of resistance sections and the resistance of each section of a starter for a 3.7 kW, 230 V, dC series motor from the following data:-Starting current varies from 1 to 1.5 times full load current Full load efficiency = 85%
Motor circuit resistance 1.4 ohm
Assume flux increases by 10% as the current rises from 1 to 1.5 times the rated full load current.
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- Subject : electrical machine Please write handwritten Answerarrow_forward22.a. One common type of electronic circuit component that is used to control the voltage and current to aDC motor is theA. silicon-controlled rectifier.B. resistor.C. capacitor.D. diode.22.b. Which one of the following types of motors can be powered with either AC or DC electricity?A. Servo motorB. Pancake motorC. Universal motorD. Shunt-wound motorarrow_forwardInterpret the statement with a mathematical calculation/proof, “The same step angle of 4.5° can be achieved with both the micro-stepping and switched reluctance stepper motors." [CO-2, C3]arrow_forward
- H.W 1) A 4-pole, 500 V d.c. shunt motor has 720 wave-connected conductors on its armature. The full-load armature current is 60 A and the flux per pole 0.03 Wb. The armature resistacne is 1.2 Q and the contact drop is 1 V per brush. Calculate the full-load speed of the motor. H.W 2) A d.c. series motor with series field, and armature resistance of 0.06 ohm and 0.04 ohm respectively is connected across 220 V mains. The armature takes 40 A, and its speed is 900 rpm. Determine its speed when the armature takes 75 A, and excitation is increased by 15% due to saturation.arrow_forwardElectrical engineering subject of electrical machines/ I need a correct and accurate solutionarrow_forwardI need answer with details and brief explanationarrow_forward
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