| METHODS TO IMPROVE THE POWER FACTOR IN SINGLE PHASE FED LOCOMOTIVES | ||||||
| Author(s) | J. Bonal; E. Destobbeleer | |||||
| Abstract | The power factor reflects the amplitude of the two simultaneous perturbations of the power supply of an electric railway locomotive: the creation of harmonic currents, and the consumption of reactive power. Generally, the input rectifier consists of two series-connected half-controlled bridges with sequential control. The authors present two methods improving the power factor: - Connection of antiharmonic filters in parallel with the half-controlled bridges working with natura! commutation - Use of bridges working with forced commutation and Pulse Width Modulation, with a very light input filter. The necessary conditions which must be fulfilled by the filter capacitors, in order to effectively improve the power factor, are deduced. |
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| Type | Members Only | |||||
| Date | Last modified 2021-03-08 by System | |||||
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