Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 58, Problem 7SQ
To determine
List the primary characteristics of a stepper motor.
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The supply voltage to a DC motor is 160V. If the back emf Ez=155V and the armature resistance
A6
is 0.250, the armature current is
a) 5A
b) 10A
c) 15A
d) 20A
1800 ro/min The frequency
Which machine the following equation is describing?
Vs = Ris + V₁ + Vc
A. Series RLC circuit
B. Separately excited DC motor
C. Permanent magnet DC motor
Write short notes on ac series motor, universal motor and stepper motor.
Chapter 58 Solutions
Electric Motor Control
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Similar questions
- A DC motor connected to a 230 V supply has an armature resistance of 0.15 Q2. The value of armature current when the back emf E, = 200 V is_ A.arrow_forwardELECTRICAL MACHINES 2 Describe the difference in construction operation of dc shunt, series, and compound motor. Compare the speed characteristics of dc shunt, series, and compound motor.arrow_forwardA shunt motor running on no-load takes 5 A at 200 V. The resistance of the fieldcircuit is 150 ohms and of the armature 0.1 ohm. Determine the output andefficiency of motor when the input current is 120 A at 200 V.arrow_forward
- Q4/B/ What are the principal characteristics of a series DC motor? What are its uses? Core Mcarrow_forwardExplain how to drive DC Motors! (there should be a description about the PWM, duty-cycle, and transistor)arrow_forward[Electrical Machines and Power System] Discuss two design considerations when selecting a stepper motor.arrow_forward
- A 400-V shunt motor has armature resistance of 0.9 ohms and field resistance of 200 ohms. Determine the back emf if it gives an output of 7.5kW at 80% efficiency.arrow_forwardA shunt dc motor has armature voltage = 150 V, armature field resistance = 100 Q, and armature resistance = 1.6 Q. At a certain torque the motor rotates at 1350 R.P.M and takes a current = 12 A. what will be the load %3D %3D %3D torque?arrow_forwardThe current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is ?arrow_forward
- Q1 Describe the Characteristics, characteristics, efficiency calculations, their applications Of DC Motors in detailarrow_forwardA hybrid stepper motor is shown in Figure Q2(b). Demonstrate how the windings of the stepper motor are excited in wave drive mode to rotate the rotor 4 steps in the counterclockwise direction. Assume that Figure Q2(b) shows the starting position (to) of the stepper motor before the windings are excited. The first step (41) is given in Table Q2(b). (Note: Transfer Table Q2(b) to the answer script; tick the correct cells in the table to show the winding excitation sequence.) (b) Table Q2(b) Clock cycle Stator pole North pole South pole i (s) t2 (s) Al A2 B1 B2 Al A2 B1 B2 Clock eyele в (s) A2 14 (s) Stator pole North pole South pole AI B1 B2 Al A2 B1 B2 stator A1 AL armature N shaft PM armature 1- amature 2 armature 2 A A2 Figure Q2(b)arrow_forwardExplain theory of a separately excited DC motor.arrow_forward
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