Direct current in electric motors?

[Plasm47]

1. Small electric motors with only one armature loop sometimes get stuck. They can be started again by giving the armature a small twist. Looking at the diagram below, what might be the explanation for the motor not being able to start on its own?

When the brush(es) reaches the split within the ring, current ceases to flow. This lack of electricty will stop the split ring commutator and evidently, the motor. Since no current can be transmitted, the motor can't start on its own. However, giving the armature a small twist will close the circuit allowing the motor to operate.

Please help! I'm not really understanding the principles of motors. I'm taking shots in the dark in answering my questions.

 

[berkeman]

1. Small electric motors with only one armature loop sometimes get stuck. They can be started again by giving the armature a small twist. Looking at the diagram below, what might be the explanation for the motor not being able to start on its own?

When the brush(es) reaches the split within the ring, current ceases to flow. This lack of electricty will stop the split ring commutator and evidently, the motor. Since no current can be transmitted, the motor can't start on its own. However, giving the armature a small twist will close the circuit allowing the motor to operate.

Please help! I'm not really understanding the principles of motors. I'm taking shots in the dark in answering my questions.

Your answer is fine. Can you think of some things that could be done to minimize this problem with DC brushed motors?

 

[Plasm47]

Your answer is fine. Can you think of some things that could be done to minimize this problem with DC brushed motors?

The problem can be minimize by using more than one armature

 

[berkeman]

The problem can be minimize by using more than one armature

Good answer!

 

[asteriatic]

It seems like you have a good understanding of the basic principles of electric motors. When the brush(es) reach the split within the ring, the circuit is broken and no current can flow. This means that the motor cannot start on its own because there is no electricity to power it. By giving the armature a small twist, you are manually closing the circuit and allowing current to flow again, which starts the motor. This is similar to how you might use a key to start a car's engine - you are completing the circuit and providing the necessary electricity to power the motor. As a scientist, it is important to understand the basic principles and workings of electric motors in order to troubleshoot and improve their design and functionality.