The reason why the contacts often connected in series when controlling small DC motors.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

This is a tilt and rotation question. Here are notes attached for reference. I prefer handwritten solutions. ONLY UPLOAD A SOLUTION IF YOU ARE SURE ABOUT THE ANSWER PLEASE. I prefer handwritten solutions.(If you had once answered this question don't answer it as I am looking for a different solution)

One end of a thin uniform rod of mass m and length 31 rests against a smooth vertical wall. The other end of the rod is attached by a string of length I to a fixed point which is located a distance 21 from the wall. A horizontal force of magnitude F, is applied to the lower end of the rod as shown. Assuming the rod and the string remain in the same vertical plane perpendicular to the wall, find the angle 9 between the rod and the wall at the position of static equilibrium. Notes: This quiz is going to walk you through a sequence of steps to do this. It won't give you the answers, but it will hopefully get you to see how to approach problems like this so that you have a working reference/template in the future. This is actually a modified version of a problem from the textbook (6.3). Note that in that problem, is not actually given. It has been introduced for convenience as we move through solving the problem, and should not show up in the final answer. DO NOT DO PROBLEM 6.3. It is not…

This is a tilt and rotation question. Here are notes attached for reference. I prefer handwritten solutions. ONLY UPLOAD A SOLUTION IF YOU ARE SURE ABOUT THE ANSWER PLEASE. I prefer handwritten solutions.(If you had once answered this question don't answer it as I am looking for a different solution)

Answer 2

Question

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Answer 6

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Answer 7

Chapter 33, Problem 1RQ

To determine

The reason why the contacts often connected in series when controlling small DC motors.

Answer 8

Expert Solution & Answer

Explanation of Solution

To break the motor circuit or to stop the motor the arc formation may occur.

In that case only load contact is required to break the circuit and to stop the motor but in that case current does not fall to zero as like the alternating current. This shows that the arc interruption in case of the DC motor is difficult.

In case the direct current do not fall the zero periodically so the severity of the arc and the risk to the damage is high.

To aid the arc interruption the load contacts in the small DC motor is connected in the series connection. Also, it increases the total air gap between the contacts and in arc quenching.

Thus, the contacts are in series in controlling small DC motor to aid the arc interruption.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Ch. 33 - Prob. 1RQ Ch. 33 - Why is direct current more difficult to interrupt...Ch. 33 - Why are clapper-type contactors generally used to...Ch. 33 - Prob. 4RQ Ch. 33 - How is the inrush current to large DC motors often...Ch. 33 - Prob. 6RQ Ch. 33 - How is the FCR connected in relationship to the...Ch. 33 - Prob. 8RQ Ch. 33 - Prob. 9RQ

The reason why the contacts often connected in series when controlling small DC motors.

Concept explainers

The reason why the contacts often connected in series when controlling small DC motors.

Explanation of Solution

Want to see more full solutions like this?

Chapter 33 Solutions