No abstract

No abstract

Synopsis:-A review is given of the development of self-propelled limiting the torque required by means of a torque regulator and railway vehicles which utilize electrical transmission, paying contactor. The problem of overcoming hunting of the system due to particular attention to the ways and means of regutlating the torque lagging of the field change and its solution are given.demand on the internal combustion engine which serves as the source The differential field control comprises the minimum amount of of power, and the supply of power to the auxiliaries.apparatus consistent with operation of the car or locomotive and its Two general designs are discussed, and classified as "differential auxiliaries. It shoutld be noted, however, in connection with this field control" and "torque control." In differentiating between type of control, that battery charging and air compressor operation these two systems, two types of differential field control are outlined, cannot be obtained at both operating and idling speeds of the engine. giving their major advantages and limitations. The principle of Torque control equipment functions to vary automatically the torque control depending upon constant engine speed is discussed, generator voltage inversely as the current in such a way that the full enumerating its advantages over previous schemes. It permits the available power of the engine is utilized; it acts directly on the absorption of the entire engine output for any throttle opening and generator field and has proved its superiority over methods of regulaengine speed selected. The various relays and control devices tion involving the exciter field. The availability of the auxiliary necessary for proper operation of the scheme are described, together generator for compressor operation and battery charging, when the with the use of the auxiliary generator and main generator for engine is running under load, represents a marked advance in design. compressor operation and battery charging.The main generator supplies these auxiliaries during idling. TheThe appendixes deal with the design of auxiliary generators for torque control system meets the requirement of any type of engine.