Explain the necessity of mechanical brake after dynamic braking occurs.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

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

2. For the OPAMP below: g) Grounding the inputs, perform a DC analysis (assume beta is infinite and VBE=0.7V and neglect the early voltage),calculate the DC currents and voltages everywhere in the circuit (all the collector and emitter currents and voltages aswell as the output voltage). Note that Q4 is 4 times as big as Q9 and Q3h) If Q1 and Q2 have a beta of 100, calculate the input bias current to the opampi) What is the input common mode range of this opamp?j) Calculate the common mode gain if the early voltage of Q3 and Q6 is 50Vk) Calculate the differential gain vo/vid of this circuitI) Calculate the input and output impedance of the opamp assuming beta is 100m) Calculate the input referred offset (Vos) if R2=21K

1. For the difference amplifier below, R1=R3=10K, R2=R4=50k, assume opamp is ideala) Find the differential mode gain, Admb) Find the input impedance (differential, between wi and va)c) Find the common mode gain in the presence of resistor mismatch (If R3=R1+ deltaR1, R4=R2+ deltaR2, deltaR1=100, deltaR2=500)d) Find the common mode rejection ratio (CMRR)e) Find the input impedance and output impedancef) If the OPAMP has an input current of 100uA, find the output offset voltage, set Vi1 = Vi2=0V

For the circuit shown, I-20 mA, R₁ =10000 2, R2 =2000 Q, R3 -2000 Q, R₁-6000 2, Vcc 5 V and the OPAMP is ideal with regions of operation are considered. The output current lo in mA is (choose the closet value): R₂ Is R₁ W VCC -VCC The relative tolerance for this problem is 1 %. -0.458 -0.833 6.667 -6.667 ○ 0.458 0.833 w R3 w RL

Answer 2

Question

Chapter 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

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 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

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 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

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 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

Answer 6

Chapter 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.

Answer 7

Chapter 50, Problem 1SQ

To determine

Explain the necessity of mechanical brake after dynamic braking occurs.

Answer 8

Expert Solution & Answer

Explanation of Solution

A motor cannot be completely stopped by applying the dynamic braking alone. In dynamic braking process, the DC motor acts as a generator by reconnecting the running motor, as a result the field gets excited and a low resistance path is created across the armature. Some of the mechanical energy of motor is converted to electrical energy resulting in the reduction of motor speed, current, generator action and the braking lessens. However, the motor does not attain complete stand-alone state due to dynamic braking, the mechanical brake is needed to stop and hold the drive at the final stage of braking.

Conclusion:

Thus, the necessity of the mechanical brake after dynamic braking occurs is explained.