The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils. Motors for a typical locomotive would be in the range 400 to 600 kW.
Which motor is used in electric traction?
Which motor is suitable for traction?
3. AC Series Motor: 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.
What type of electric motor is used for the traction motor in Hybrid Electric Vehicles?
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.12 мая 2013 г.
Do trains run on AC or DC?
Direct current, either directly supplied, or converted from AC onboard a train, is the most commonly used. This is because, according to railsystem.net, “DC consumes less energy compared to an AC unit for operating the same service conditions.
Are locomotives AC or DC?
All in all, the AC traction locomotive offers about twice the amount of adhesion as a DC unit. Therefore, a modern lightweight AC locomotive such as the RX500 can provide as much or more tractive effort than an old style DC unit like the SW1200 which weighs 60% more.
Which motor is used in metro train?
Which motor is used in tramway?
Mostly DC series motors are used in this system. For trolley buses and tramways, DC compound motors are used where regenerative braking is required. The various operating voltages of DC traction system include 600V, 750 V, 1500V and 3000V.
Why is 25kV used in electric traction?
The main reason for 25kV voltage used in railway is, that 25 kV AC more economical than 1.5kV DC voltage system. Since 25kV voltage system has higher voltage, the higher voltage reduces the current flow through conductor; this reflects to reduce the conductor size. The cost of the conductor gets less.
Does Tesla use brushless motors?
Today, all the hybrids are powered by DC brushless drives, with no exceptions. The only notable uses of induction drives have been the General Motors EV-1; the AC Propulsion vehicles, including the tzero; and the Tesla Roadster. Both DC brushless and induction drives use motors having similar stators.
What is the best car to convert to electric?
Top 5 Electric Vehicle Conversions
- Porsche 924 EV.
- Mazda Miata EV. …
- Chevy S-10 and Ford Ranger. GM’s Chevrolet S-10 Electric Vehicle. …
- Triumph Spitfire. This British classic no longer spits carbon after it’s been converted to electric power. …
- VW Bus (Officially, the Type 2 or T2) The Volkswagen Bus lends itself nicely to EV conversions. …
Why DC motor is not used in EV?
Brush DC motor: mechanically commutated, only a simple DC ‘chopper’ is required to control torque. While Brush DC motors can have permanent magnets, the size of the magnets for traction applications makes them cost-prohibitive. As a result, most DC traction motors are series- or shunt-wound.
Which type of DC motor is used for traction?
Traditionally, these were series-wound brushed DC motors, usually running on approximately 600 volts. The availability of high-powered semiconductors (thyristors and the IGBT) has now made practical the use of much simpler, higher-reliability AC induction motors known as asynchronous traction motors.
What is traction inverter?
Traction inverters convert dc power from an on-board high voltage (HV) battery into ac power to drive the main motor or motors of an electric vehicle. In addition, traction inverters perform functions such as voltage boosting, switch protection and regenerative braking.
Which braking is also called?
Braking accomplished by reversing the motor connections, at the same time inserting appropriate resistance in the rotor circuit to adjust the negative torque to the desired value. With this method, complete control of deceleration is obtained, even to a dead stop.