2013年8月19日星期一

What are electric vehicles?


Electric flat car is an electric rail plant transportation vehicles. Also known as trolley, cross-over vehicles. It has a simple structure, easy to use, easy to maintain, load capacity, less pollution and other advantages. Widely used in machine building and metallurgical plants, as a workshop with the crane transport heavy loads over the cross-purposes. KP series electric flat car height is low, countertops strengthened, modified, easy maintenance.

    KPJ Series electric flat car is powered reel to reel 380V AC power cable. Cable reels for the hysteresis coupling type, ensure that the cable is not easy to pull the bad even by force. AC 380V to flat car YZ hoisting metallurgical motors provide power, motor drag flat car running. Cable reel flat car runs automatically rolled up or release the cable, powered by the length of the spool impact, the general maximum operating distance of less than 200m.

    KPD series is a 36V single-phase (three-phase) electric power supply voltage rail flat car to rail trolley line power supply. Ground step-down transformer control cabinet will single-phase (three phase) AC 380V step-down to a single phase (three phase) 36V, via rail trolley line fed flat car, and then the car is a single-phase step-up transformer (phase ) AC 380V. To the flat car with a single-phase capacitor motor provides power (YZ when lifting metallurgical phase motor). Because without cable, so safe and reliable, not afraid of hot, not afraid to drop, without prejudice to the cross-transport, easy to realize remote control and automation, factory transport arranged to give great convenience. But its track construction are higher, and shall ensure that track insulation, over a certain distance running track should be added to compensate for copper wire. Run a long distance number must also be increased step-down transformer.

    As KPD flat car starter starting current flowing through the track is very large (up to 1000A), end of the electric stacker at this time a great voltage drop, resulting in difficulty in single-phase capacitor start motors, the maximum single-phase KPD flat car of 50 tons deadweight , load 50 tons or more three-phase 36V low voltage rail power supply, YZ hoisting metallurgical motors.

    Product KPDZ only inherits the advantages of KPD flat car and avoid the original model is difficult to start and run a short distance shortcomings. KPDZ flat car to car on the track rectifier single phase (or phase) 36V AC to DC 36V, DC traction motor drag the flat car running, DC motor and AC motor burn easily compared, starting torque strong overload advantages. Even though the track insulation aging and other reasons, the undervoltage condition can still work reliably.
 
    Battery Type KPX series is battery electric vehicles to battery power. Battery to provide power to the DC traction motor, DC motor drag flat car running. Compared with AC motors DC motors have easy burning, starting torque, strong overload advantages. Unrestricted travel distance. It is more than KPJ, KPD two series of flat car with greater flexibility and mobility safety performance, operation distance is not restricted, no insulation requirements of the track, so inexpensive and easy construction.

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