Control system for electric railway car

Abstract

Abstract PURPOSE:To enhance the adhesion characteristic of motors for electric railway car by a method wherein a means to make the motors coupled to idling shafts to perform single phasing is provided. CONSTITUTION:An average value arithmetic unit 7 outputs an average value of torque signals of the motors 1A-1D outputted from torque detectors 5A-5D as a torque feedback signal T. A subtractor 9 applies a deviation signal between the torque feedback signal T and a torque command signal T* to an inverter 2 to generate AC output of variable voltage and variable frequency. An average value arithmetic unit 8 outputs an average value of speed detecting signals outputted from speed detectors 6A-6D provided in the motors 1A-1D. Comparators 11A-11D hold output frequency of the inverter 2 at the fixed value when the deviation between the average speed signal and the speed detecting signal become to the prescribed value or more, and changes the motors 1A-1D generating idling over the single phasing system opening switches 13A-13D.

Inventors

• 👤 Hiroshi Higasa
• 👤 樋笠　博
• 👤 Masakazu Kobata
• 👤 木幡　雅一
• 👤 Kazunori Masuda
• 👤 増田　和典

Bibliographic Details