About the Quasi-Direct Feed Possibility of the Induction Traction Motors from Diesel-electric Locomotives

Applications of power electronics in railway systems

“…According to [51] voltage and current unbalance are related to train load and motion conditions and power supply configuration. Classic methods of unbalance alleviation which generally are 3 phase to 2 phase transformers are considered in this unbalance effect study (3 phase to 4 phase transformation for rail way application is proposed in [75]). To compare different railway load distribution effect four experiments with varying loads and different arrangement has been prepared.…”

“…[63] is a vector control induction motor study realized for traction application. [75] presents a control system for motor suppling power electronic circuit, which suppose to feed traction motor without a regulated DC link. [84] analyses traction system as a whole including inverter, rectifier, and contactor and DC traction motor.…”

An Alternative to Squirrel Cage Induction Motor for Electric Traction for Indian Railways – a Theoretical Cost saving Approach

“…Both Diesel-Electric and Electric Locomotives were using DC Series Motors for driving the Axles for the reasons of high starting torque and a cheap speed control mechanism by means of series parallel control. As the onboard Alternator was introduced in the WDP Class Electromotive Diesel Locomotives, the basic Power Electronics Control Circuit became almost similar for both Diesel-Electric and Electric Locomotives with difference in the mode of feeding Power to Locomotive -Alternator in Electro Motive Diesel (EMD) [1] and Over Head Equipment (OHE) in Electric Locomotives.…”