Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 26, Problem 4SQ
How may additional steps of acceleration be added?
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1 . The armature of a 4-pole, lap-wound machine has 24 slots. Detemline the slot
pitch, the front pitch, and the back pitch. Sketch its polar-winding diagram and
highlight the parallel paths. If the armature current is 200 A, what is the current
per path?
PLEASE ANSWER IT NOW, I NEED THE ANSWER
Find the total external armature current of a dc machine which has thefollowing specifications: 120 armature slots; 6 conductor per slot; 9300lines per cm2 flux density; armature diameter of 28 inch ; 14 incharmature axial length ; 4 armature parallel path ; the pole span 72 % ofthe armature surface and the torque developed by the armature 1500 lb-ft.
In applications such as hoist, gates, movable bridges, street cars, locomotives, and transfer cars, very high starting torque is required and speed can vary with load changes. With the aid of diagrams, select the most appropriate motor for such applications?
Chapter 26 Solutions
Electric Motor Control
Ch. 26 - What is the purpose of inserting resistance in the...Ch. 26 - Why is the power not interrupted when the motor...Ch. 26 - If the starter is to function properly and a...Ch. 26 - How may additional steps of acceleration be added?Ch. 26 - What is meant by the low or poor starting economy...Ch. 26 - Prob. 6SQ
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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
- To what does current limiting, or compensating time, acceleration refer?arrow_forwardFind the total external armature current of a dc machine which has thefollowing specifications: 120 armature slots; 6 conductor per slot; 9300lines per cm2 flux density; armature diameter of 28 inch ; 14 incharmature axial length ; 4 armature parallel path ; the pole span 72 % ofthe armature surface and the torque developed by the armature 1500 lb-ft. (ANS: 133.6 A) PLEASE ANSWER IMMEDIATELYarrow_forwardSOLVE AND SHOW YOUR COMPLETE SOLUTION. ANSWERS SHOULD BE IN TWO DECIMAL PLACES. The armature of a two-pole dc machine has 30 slots, each slot has 4 conductors each. during its operation, only 75% of the conductors are directly under the pole. each pole measures 2 inches by 3 inches and produces ten million maxwells of flux. the armature core is 12 inches in length and 3.5 inches in diameter. the total resistance of the winding is 2 ohms. e) Determine the total torque exerted by the armature core in ft - lb if the winding is simplex lap winding.arrow_forward
- The current in a conductor on the armature of a dc motor is 300A. The flux under the poles is 850x10-6 Wb. The area per pole is 700 mm2. The length of the conductor on the armature is 640mm. Calculate the force exerted on the conductor.arrow_forwardCan you please provide a clear and readable solution for this problem about rotational mechanical systems with gears? Super thanks!arrow_forwardFind the total external armature current of a dc machine which has the following specifications: 120 armature slots; 6 conductor per slot; 9300 lines per cm flux density; armature diameter of 28 inch 14 inch armature axial length ; 4 armature parallel path ; the pole span 72% of the armature surface and the torque developed by the armature 1500 lb-ft.arrow_forward
- A d.c series machine rated at 200V, 100A has an armature resistance of 0.1Ω and field resistance of 0.15 Ω . The friction and windage loss is 1500W . Use a Vbase of 200V and an Ibase of 100A . Use the above information to answer the questions below. a.Calculate the per unit value of the total series resistance of the machine. b. Calculate the per unit value of the friction and windage loss. c. Calculate the per unit value of the total series resistance loss at the rated load. d. Calculate the per unit value of the total power loss at the rated load. e. Calculate the per unit value of the efficiency of the machine .arrow_forwardhi tutor this subject is all about Dc machine Please help me ASAParrow_forwardDiscuss the various types Brushless machines? Also explain their applications?arrow_forward
- Pls Explain the following 1. What are the types of DCmotors? 2.What is torquearrow_forwardFind the total external armature current of a dc machine which has thefollowing specifications: 120 armature slots; 6 conductor per slot; 9300lines per cm2 flux density; armature diameter of 28 inch ; 14 incharmature axial length ; 4 armature parallel path ; the pole span 72 % ofthe armature surface and the torque developed by the armature 1500 lb-ft.[Ans. Ia = 133.6 A]arrow_forwardHi, my topic is about Optical Instruments: Elecricity and Magnetism, please use this as reference when answering, thanks!What is the basic principle of an electric motor and generator?arrow_forward
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