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.
What is the function of traction motor?
The traction motor of EVs is responsible for converting electrical energy to mechanical energy in such a way that the vehicle is propelled to overcome aerodynamic drag, rolling resistance drag, and kinetic resistance.
How many traction motors does a locomotive have?
The Trucks: Braking
In conjunction with the mechanical brakes, the locomotive has dynamic braking. In this mode, each of the four traction motors acts like a generator, using the wheels of the train to apply torque to the motors and generate electrical current.
What type of motor is traction motor?
AC induction motors known as asynchronous traction motors. Before the mid-20th century, a single large motor was often used to drive multiple wheels through connecting rods.
What is traction on a train?
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.
Are locomotives AC or DC?
Rectifier locomotives, which used AC power transmission and DC motors, were common, though DC commutators had problems both in starting and at low velocities. Today’s advanced electric locomotives use brushless three-phase AC induction motors.
Why are DC motors used in trains?
DC motors are used on trains is because of their high torque and good speed control. … Trains are a large-scale application; therefore, a DC motor can effectively and safely move the heavy load forward.
How are locomotives powered?
The ignition of diesel fuel pushes pistons connected to an electric generator. The resulting electricity powers motors connected to the wheels of the locomotive. A “diesel” internal combustion engine uses the heat generated from the compression of air during the upward cycles of the stroke to ignite the fuel.
How does a locomotive get traction?
Trains get traction because of the immense weight of the locomotives, and the friction generated between the wheel and rail head. … To assist with gaining traction, many modern locomotives are equipped with traction control systems, which will control the amount of tractive effort applied to the rail head.
Are locomotives electric?
Although commonly called “diesels,” the locomotives actually are electrically driven. The diesel engine drives an alternator, which produces electricity to run electric motors mounted on the locomotive’s axles.
What type of DC motors is used in traction system?
|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|
Which DC motor is used in train?
Series-wound DC motors. That means current flows through the armature, then through the fields. They have high starting torque, favorable for starting a train. Nowadays the trend is toward AC motors, typically a 3-phase induction motordriven by a DC->AC inverter control.
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.
How does a train not slip?
Thus, trains stay axled, with the wheels on both sides of the train rotating at the same speed, and are still able to go around curves. When trains go around curves and corners, they must tilt. With all this tilting, it’s surprising that trains don’t fall over.
How does traction power work?
A traction network or traction power network is an electricity grid for the supply of electrified rail networks. … Alternatively, the three-phase alternating current of the power grid can be converted in substations by rotary transformers or static inverters into the voltage and type of current required by the trains.
What is traction supply?
A traction substation, traction current converter plant or traction power substation (TPSS) is an electrical substation that converts electric power from the form provided by the electrical power industry for public utility service to an appropriate voltage, current type and frequency to supply railways, trams ( …