Which type of DC motor is used for electric traction?
1. DC shunt motor is a constant speed motor but for traction purpose, the speed of the motor should vary with service conditions. 2. In case of DC shunt motor, the power output is independent of speed and is proportional to torque.
Which motor is most suitable for electric traction?
Many single phase ac motors have been developed for traction purposes but only compensated series type commutator motor is found to be best suited for traction. Single phase induction motors have been abandoned as they are not capable of developing high starting torque.
Which of the following motor is used in traction?
DC series motor is best suited for DC traction, cranes as it provides high starting torque and easy speed control which is primary requirement of DC traction.
|DC compounded motor||Presses, Shears, Elevators, Rolling Mills|
|Stepper motor||3D printing equipment, Small robotics, CNC milling machines|
What is electric traction motor?
Traction motors are powered by electricity and generate the power to rotate the wheels of the train. The turning force produced by traction motors is transmitted to the wheels via the driving gear unit and axle. Traction motors are typically mounted in the trucks where the wheels are housed.
Why a series motor is preferred for the electric traction?
DC Series motor is variable speed motor. Due to these characteristics motor is protected against overload. … DC series motor has develops high torque at low speeds, low torque at high speed, this is the basic requirement of traction unit. Commutating property of series motor is good so we get sparkles commutation.
Why induction motor is used in traction?
This is the most important feature of traction motor provides opportunity for saving on energy but also smoothness in braking, saving on wear and tear in mechanical braking system. An Induction motor works as a generator if mechanical speed is more than the synchronous speed.
Which of the following motor is most suitable for regenerative braking in electric traction?
But if you want more braking plus energy, use a generator G or DC motor and, by creating a resistor between the two ends of the coil, you can control the braking force and use its energy to generate and store electricity. Switched Reluctance Motor is the best in terms of regenerative braking.
Which motor is used in tramway?
The drives can run on a dc motor with electromagnetic excitation from a power electronics converter, or one excited by permanent magnets. They can also run on a cage induction motor, a slip-ring induction motor or a brushless motor.
What is traction system?
The traction system is a component of the train. It is a system installed on the roof or underneath the train. The traction system converts the electrical energy, collected from the catenary via the pantograph, into mechanical energy, thus enabling the wheels to turn and, therefore, the train to accelerate and brake.