You asked: Which method is most suitable to easily stop the motor?

How do you stop an electric motor?

Dynamic braking is another method for braking a motor. It is achieved by reconnecting a running motor to act as a generator immediately after it is turned off, rapidly stopping the motor. The generator action converts the mechanical energy of rotation to electrical energy that can be dissipated as heat in a resistor.

How do you stop an AC motor fast?

DC injection braking provides a fast stop and can hold the motor through an applied braking force after the motor has stopped. With DC injection braking, the energy output is heat, so the braking time is usually short and quick, say no more than 2 seconds.

Which method in DC motor stops the motor fast?

The correct answer is A.

This is accomplished through the use of “reverse-connected” SCRs, which allow the drive to conduct current in the opposite direction and oppose the rotation of the motor, bringing it to a quick stop.

IT IS INTERESTING:  Frequent question: What kind of car seat covers are safe?

How are Motors braked or stopped?

Motor brakes generally use friction between mating surfaces to stop or hold a load. … They generate friction and braking torque in one of two ways — spring set or permanent magnet. Both methods use an electrical coil that, when voltage is applied, moves the friction faces apart to disengage the brake.

What is braking in motor?

The braking is the process of reducing the speed of an induction motor. In braking, the motor works as a generator developing a negative torque which opposes the motion of a motor.

What is braking of DC motor?

Kindly see that the braking preferred to stop a DC Motor is Electrical Braking and not Mechanical Braking. In other words, the motor is stopped by the voltage and current action in the circuit rather than the mechanical friction brakes on the rotor.

How do you break an AC motor?

With this braking circuit in place, the only action a VFD must take to dynamically brake an AC induction motor is simply slow down the applied AC frequency to the motor until that frequency is less than the equivalent rotor speed (i.e. create a condition of negative slip speed).

Which method is the most efficient method of electrical braking?

The most economical method of electrical braking is regenerative braking. Regenerative braking: In this type braking back emf Eb is greater than the supply voltage V, which reverses the direction of the motor armature current.

Which of the following 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.

IT IS INTERESTING:  What is mechanical automobile engineering?

Which is a better method to control motor speed Mcq?

DC Motor Speed Control MCQ Question 1 Detailed Solution

We can control the speed by increasing armature resistance. This method gives only below base speeds. This method is a constant torque and variable power drive.

Which method is suitable for the speed control below and above the normal rated speed of DC shunt motor?

Voltage control method is suitable for speed control, below and above normal rated speed of d.c. shunt motor. Q.

How can we stop DC motors automatically?

instead, using simple relay logic, electrically isolate motor and then connect low value, power resistor parallel to the motor to brake it. This arrangement will bring motor gently to stop without any mechanical arrangement.

Which method is the most efficient method of electrical braking Mcq?

Regenerative braking

Electrical energy is feedback to the supply. The magnetic drag produced on account of generator action offers the braking torque. It is the most efficient method of braking.

How does DC Braking work?

DC injection braking works just as its name implies — by injecting DC voltage into the motor windings. … When DC current is applied to the motor windings, it creates a fixed (rather than rotating) magnetic field. Braking action is produced by the rotor working to align to this stationary field.