Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 33, Problem 27RQ
To determine
Why do stepping motors have teeth machined in the stator poles and rotor.
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Chapter 33 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 33 - What are the three basic types of split-phase...Ch. 33 - The voltages of a two-phase system are how many...Ch. 33 - How are the start and run windings of a...Ch. 33 - In order to produce maximum starting torque in a...Ch. 33 - What is the advantage of the capacitor-start...Ch. 33 - On average, how many degrees out of phase with...Ch. 33 - What device is used to disconnect the start...Ch. 33 - Why does a split-phase motor continue to operate...Ch. 33 - How can the direction of rotation of a split-phase...Ch. 33 - If a dual-voltage split-phase motor is to be...
Ch. 33 - When determining the direction of rotation for a...Ch. 33 - What type of split-phase motor does not generally...Ch. 33 - What type of single-phase motor develops the...Ch. 33 - Prob. 14RQCh. 33 - Prob. 15RQCh. 33 - When a repulsion-start induction-run motor reaches...Ch. 33 - Prob. 17RQCh. 33 - What causes the magnetic field to rotate in a...Ch. 33 - How can the direction of rotation of a shaded-pole...Ch. 33 - Prob. 20RQCh. 33 - Prob. 21RQCh. 33 - Prob. 22RQCh. 33 - Prob. 23RQCh. 33 - Prob. 24RQCh. 33 - What is the principle of operation of a stepping...Ch. 33 - What does the term bifilar mean?Ch. 33 - Prob. 27RQCh. 33 - When a stepping motor is connected to AC power,...Ch. 33 - What is the synchronous speed of an eight-pole...Ch. 33 - How can the holding torque of a stepping motor be...Ch. 33 - Why is the AC series motor often referred to as a...Ch. 33 - Prob. 32RQCh. 33 - How is the direction of rotation of the universal...Ch. 33 - Prob. 34RQCh. 33 - Prob. 35RQCh. 33 - Prob. 36RQCh. 33 - Prob. 1PA
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- How can the holding torque of a stepping motor be increased?arrow_forwardQ2- Indicate whether the following statements are true or false and correct the false statements 1- The brushes of d.c machine always are placed at the magnetic neutral axis 2- The field current of d.c shunt generator is not affected by load current. 3-The armature voltage of d.c series generator is not affected by load current. 4- A lap winding is most suitable for higher voltage rating machines 5- In de generator, the critical resistance can be increased by increasing its speed 6-In LAP winding the front pitch equal to (yr Ye- yb). 7- The speed of d.c series motor is decreased if the armature current is decreased 8- The compensating winding carrying the field current 9- By tapping field method, the speed of d.c series motor can be controlled below rated value 10- To solve the Commutation Problem in small machines, this can be achieved by increasing the brush widtharrow_forwardWhich is the device in DC generators that converts AC into DC? stator brushes commutator armature This type of armature winding delivers high e.m.f. and low current. dummy or idle coils lap winding O frog-leg winding wave windingarrow_forward
- the magnetic strengh of the field poles on a perment magnet DC motor cannot be varied a- true b- falsearrow_forwardIf residual magnetism of a shunt generator is destroyed due to any reason, it may be restored by connecting its shunt field * to an AC source to a DC source to neutral to earth The direction of electro-magnetic torque developed in the armature of a DC machine can be reversed by reversing the direction of * rotation armature current either field flux or armature current. field fluxarrow_forwardsolve the question in the picture pleasearrow_forward
- ASAP ASAP ASAP previous answer is wrongarrow_forwardANSWERE FAST PLEASE QUESTION from book ELECTRIC MACHINE-1 LAB BASESD QUESTION i. A variable resistive load of (0-1K) ohm is connected across the DC shunt motor. What willbe the load characteristics in this case? What will be the effect of N on torque? Given thefollowing table of observations. ii. If the same load is connected across the DC shunt generator, what will be the difference.Explain using drawing.arrow_forwardIn a dc machine 4 pole lap winding is used. The number of parallel paths are?arrow_forward
- What effect does increasing rotor circuit resistance have on the breakdown torque and on slip at which breakdown occurs.arrow_forwardQUESTION 19 The torque of a DC motor is at its minimum strength when the motor's armature loop is at the neutral plane O inside of the main fieldarrow_forwardQuestion 2 / 220-V, 4-pole shunt motor with 800 conductors wave-connected supplying a load of 8.2 kW by taking 45 A from the mains. The flux per pole is 25 mWb , its armature circuit resistance is 0.6 ohm and the shunt field resistance is 110 ohm.arrow_forward
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