Which of the following is a disadvantage of plugging a motor?

Another drawback to plugging is that it can induce high mechanical shock loads on the motor and connected equipment, due to the abrupt stop that it causes. Plugging is also a very inefficient method of stopping and, therefore, generates significant heat.

What are the advantages and disadvantages of plugging in electric drive?

Disadvantages of Electrical Drive

  • The application of the drive is limited because it cannot use in a place where the power supply is not available.
  • It can cause noise pollution.
  • The initial cost of the system is high.
  • It has a poor dynamic response.
  • The output power obtained from the drive is low.

What is plugging a motor?

Plugging is defined by NEMA as a system of braking, in which the motor connections are reversed so that the motor develops a counter torque, which acts as a retarding force. Plugging controls provide for the rapid stop and quick reversal of motor rotation.

Which of the following is a common method of braking a motor?

Two common basic methods used for braking a motor are DC injection braking and dynamic braking.

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What is the plugging?

Plugging is the method of inducing negative torque in the rotor of an induction motor to rapidly bring its speed of rotation to zero. This is done by reversing the supply connection at the stator terminals.

What are the disadvantages of electric traction?

Disadvantages of Electric Traction (i) High initial expenditure (ii) Failure of supply is a problem (iii) Electrically operated vehicles have to move only on electrified track (iv) For braking & control, additional equipments required (v) Interference with telegraphs and telephone lines.

Another drawback to plugging is that it can induce high mechanical shock loads on the motor and connected equipment, due to the abrupt stop that it causes. Plugging is also a very inefficient method of stopping and, therefore, generates significant heat.

Which braking is not suitable for motor?

1. Regenerative braking is not possible in a series motor. Explanation: In regenerative braking, the motor acts as a generator. The back emf is more than the terminal voltage in case of regenerative braking.

Where is plugging braking used?

Applications of Plugging

The Plugging is commonly used for the following purposes listed below: In controlling elevators. Rolling Mills. Printing Presses.

Which motor is used in regenerative braking?

One commonly used method of regenerative braking of DC Series Motor is to connect it as a shunt motor. Since the resistance of the field winding is low, a series resistance is connected in the field circuit to limit the current within the safe value.

Which is the best braking method?

Explanation: Plugging is the best braking method among all braking techniques. In plugging the value of the armature current reverses and the mechanical energy is extracted. A very high braking torque is produced in case of plugging.

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Which motor is used in traction system?

AC traction motors have replaced DC motors in many traction applications. The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils.

What method does not allow braking for DC motor?

Regenerative Braking

The motor begins to operate as an electric generator. It is very interesting to note that regenerative braking cannot be used to stop a motor but to control its speed above the no-load speed of the motor driving the descending loads.

What are the advantages of plugging?

Plugging in offers many advantages, including (1) the end of tailpipe emissions, (2) the per-mile creation of less GhGs even when running on electricity generated by dirty coal, and (3) the potential of running on electricity generated by emissions-free sources like wind, solar, hydrokinetics and geothermal.

What does it mean I need a plug?

A plug (or the plug) is a person who has the ability to get or supply hard-to-find items, especially drugs.

How is a plugging stop accomplished?

Plugging is accomplished with three phase motors by disconnecting the motor from the power line and momentarily reversing the direction of rotation. As a generally rule, the reversing contactor is of a larger size than the forward contactor because of the increased plugging current.

Motorization