between the low voltage circuit101and a high voltage circuit104and mainly uses the capacitor C2to boost step-up ration or bear part of voltage during step-down; a clamping circuit103comprising a clamping inductor L1, a clamping capacitor C1, a first clamping diode D1, a second clamping diode...
D.C. speed signals for each axle of the bogie are compared at a switch DS1 which provides a signal (if the difference exceeds a given amount) to the valve; these signals also pass to an OR gate G11 which transmits the higher signal to one input of a switch DS3, the other input ...