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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Students have asked these similar questions
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
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.
Chapter 58 Solutions
Electric Motor Control
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Similar questions
- Write short notes on ac series motor, universal motor and stepper 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[Electrical Machines and Power System] Discuss two design considerations when selecting a stepper motor.arrow_forward
- Explain how to drive DC Motors! (there should be a description about the PWM, duty-cycle, and transistor)arrow_forwardq8arrow_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_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_forwardTopic: Efficiency and Testing of DC machines See the image sttached.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
- A 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_forwardThe armature resistance of a shunt motor is 0.09 N. When connected to a 230-V supply a counter-emf of 222.8 V is developed. Find (a) the armature current; (b) the armature current when the armature is not rotating; (c) counter-emf when the armature current is 100 A. A shunt motor operates at 1400 r/min when connected to a 110-V line. The armature current is 20 A, and the armature resistance is 0.15 N. If the flux remains constant, determine the speed of the motor when the armature current is 34 A.arrow_forwardA permanent magnet de commutator motor has a no load speed of 6000rpm when connected to 120V supply. The armature resistance is 2.50 and other losses may be neglected. The speed of the motor with the supply voltage of 60V developing a torque of 0.5Nm isarrow_forward
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