Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of these is the method of electric braking
Dynamic
Plugging
Regenerative
All of above
All of above
Electric braking is a process in which the kinetic energy of the rotating parts of a motor is converted into electrical energy. The motor acts as a generator, creating a counter-torque that opposes the rotation of the shaft to bring the system to a stop or control its speed.
Electric braking is a process in which the kinetic energy of the rotating parts of a motor is converted into electrical energy. The motor acts as a generator, creating a counter-torque that opposes the rotation of the shaft to bring the system to a stop or control its speed.
PbrakingтАЛ=TтЛЕ╧Й
V=EbтАЛ+IaтАЛRaтАЛ (General DC machine equation during regeneration)
Dynamic braking involves dissipating energy as heat in an external resistor. Regenerative braking feeds the generated electrical energy back into the power source, improving efficiency. Plugging involves reversing the supply polarity, which creates a high opposing torque to stop the motor rapidly.
Braking is essential for precision control in traction systems (trains, hoists).
Regenerative braking is the most energy-efficient method as it recovers energy.
Plugging provides the highest braking torque but requires careful protection of the motor insulation.
Dynamic braking is preferred when energy recovery is not feasible but rapid, controlled stopping is required.
Reduced mechanical wear on brake shoes/pads.
Smooth and precise deceleration control.
Energy savings in regenerative mode.
Higher initial cost due to control circuitry.
Plugging can cause excessive thermal stress.
Complexity in switching and power electronics.
Electric Locomotives
Electric Vehicles (EVs)
Industrial Hoists and Cranes
| Feature | Dynamic Braking | Regenerative Braking |
|---|---|---|
Energy Usage | Dissipated as heat | Returned to source |
In plugging, the supply leads to the armature are reversed, causing the machine to exert a torque in the direction opposite to rotation.
The question covers all three fundamental forms of electric braking used in industrial and traction drive systems.
D is correct тАФ Dynamic, Plugging, and Regenerative are the three primary standard methods of electric braking in electrical machines.
Always remember that in Regenerative braking, the induced EMF (EbтАЛ) must be greater than the supply voltage (V) for current to flow back into the source.