| 摘要 |
945,963. Electromechanical systems for transmitting power. R. ADOUTTE, K. SCHNEIDER, and M. BAUMGARTNER. Oct. 15, 1962 [Oct. 20, 1961], No. 38879/62. Headings H2H and H2J. In a power-matching arrangement for a diesel electric traction system, a signal representing the desired diesel power output at any speed automatically controls the " electrics " to first strengthen the generator field and then weaken the motor field. Current balancing for parallel motors and current limiting at starting is provided. As described a signal from a tachometer generator 16 driven by the diesel D is " tailored " by a function-generator 17 to provide the power-reference-signal which is compared at 15 with the generator output as sensed in terms of the voltage across device 21 and the motor current multiplied together at 18. The power error signal is applied to function generators 13, 14 to control rectifiers 2, 8, 12, energizing the generator and motor fields. The function generator 13 allows progressive strengthening of the generator field until a certain level is reached, at which the generator control signal is clamped. The function generator 14 allows no control of the motor field until a certain level of error signal is reached after which there is progressive weakening of the motor fields. Current balancing and limiting.-The currents of the two motor groups measured at 23, 24 are fed to a comparator 25 producing two equal limited amplitude signals of opposite sign, and proportional to the current difference. These signals are applied to control the rectifiers 8, 12 to reduce the current difference. During starting the diesel speed control member 4 also varies the function generator 19 to limit the error signal output from comparator 26, which is used as a reference for comparator 20 and compared with the motor current signal from device 22 which compares the two motor current values, and passes on whichever is the bigger. Overload.-When the diesel injection exceed a reference value, a limiting signal may be applied at 26 to comparator 15. |
