DIESEL VS ELECTRIC TRACTION

Double 7.5-kW Three-Phase Switched ReluctanceMotors Parallel Drive System for ElectricLocomotive Traction 2/25/20151OSMANIA UNIVERSITY (IDC-102)1CONTENTSIntroductionOperational PrinciplesComponents and RatingsBlock Diagram ConfigurationControl StrategyOperational ExperimentAdvantages of the Proposed driveConclusion2/25/20152OSMANIA UNIVERSITY (IDC-102)INTRODUCTIONDc motors are having huge Importance in coal Mines from long period

It is necessary to improve the transport vehicle in the aspect of the performance, the safety, the reliability and the maintenance cost

This proposes an electric locomotive in coal mine drawn by the parallel drive system of the switched reluctance dual motors.

2/25/2015OSMANIA UNIVERSITY (IDC-102)3 Operates in all four Quadrants with fixed conducting angles PWM control strategy.

The new technique for multidimensional performance optimization of switched reluctance motor drives with optimum firing turn-on and turn-off angles for achieving high drive efficiency and lowest torque ripple is developed

It is shown that the rotor speed error of the subordinate motor is within 5% and the error of the output torque of the subordinate motor is within 10%.

2/25/2015OSMANIA UNIVERSITY (IDC-102)4 OPERATIONAL PRINCIPLESThe relationship between the phase inductance, the rotor position , and the phase current I

Lmin is the minimum value of the phase inductance Lmax is the maximum value of the phase inductance 1k=turn-on angle, 2k=turn-off angle, (k= I, II,III, IV)2/25/2015OSMANIA UNIVERSITY (IDC-102)5

For Symmetrical Traction in 1 and IIIThe triggering signals of the main switches at I-quadrant ( 1I& 2I)are advanced as f1= 1I+ 2IAnd those could be used as the triggering signals of the main switches at III-quadrant 1III = f1- 2I, 2III = f1- 1I

For Symmetrical Braking (II and IV) The triggering signals of the main switches at 1I-quadrant ( 1II& 2II)are advanced as f2= 11I+ 21Iand those could be used as the triggering signals of the main switches at IV-quadrant 1IV = f2- 21I, 2IV = f2-11I

2/25/2015OSMANIA UNIVERSITY (IDC-102)6 The phase current chopping control strategy could be adopted at the low rotor speed range in order to balance the distribution of the loads of the two switched reluctance motors in the parallel drive system.

The fixed angle PWM control strategy is adopted for the adjustable speed control at the high rotor speed range and the regenerative braking control of the driveThe output power of the Switched Reluctance motor drive system is P 2= K Us Iin Where K (0