What is the function of traction motor?

What is the purpose of a traction motor?

A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit.

What is the function of electric traction?

Electric traction allows the use of regenerative braking, in which the motors are used as brakes and become generators that transform the motion of the train into electrical power that is then fed back into the lines.

Which motor is used as a traction motor?

List of electric motors used for traction: 1. DC Series Motor 2. DC Shunt Motor 3. AC Series Motor 4.

How does electric traction motor work?

The traction motors provide propulsion power to the wheels. There is one on each axle. Each motor drives a small gear, which meshes with a larger gear on the axle shaft. This provides the gear reduction that allows the motor to drive the train at speeds of up to 110 mph.

Why is traction used?

Most often, traction uses devices such as weights and pulleys to put tension on a displaced bone or joint, such as a dislocated shoulder. The tension helps put the joint back in position and keep it still. Traction is also used to keep a group of muscles (such as the neck muscles) stretched to reduce muscle spasms.

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What type of DC motor is used in traction system?

Detailed Solution

Motor Application
DC series motor Traction system, Cranes, air compressors
DC shunt motor Lathe Machines, Centrifugal Pumps, Blowers, Conveyors, Weaving Machine, Spinning machines
DC compounded motor Presses, Shears, Elevators, Rolling Mills

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.

What is the speed of DC motor?

DC controls adjust speed by varying the voltage sent to the motor (this differs from AC motor controls which adjust the line frequency to the motor). Typical no load or synchronous speeds for an AC fractional horsepower motor are 1800 or 3600 rpm, and 1000-5000 rpm for DC fractional hp motors.

Why DC motor is used in traction?

DC Series motor has high rate of acceleration and retardation. 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.

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.

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Which traction system is best?

In case of heavy trains that require frequent and rapid accelerations, DC traction motors are better choice as compared AC motors. DC train consumes less energy compared to AC unit for operating same service conditions.