Document Type and Number:
Japanese Patent JPS4014685
Kind Code:
B1
Abstract:
1,018,716. Control of D.C. motors. WESTINGHOUSE ELECTRIC CORPORATION March 24, 1964 [April 3, 1963], No. 12278/64. Heading H2J. Acceleration and dynamic braking of traction motors M1, M2 is effected by a master controller which is notched automatically by a bi-stable magnetic amplifier MA having control windings 16, 18 sensitive to motor current. The controller is pneumatically actuated and is controlled by electromagnetic valves BV, PV energized by the magnetic amplifier, there being a Zener diode Z in their circuit which prevents spurious operation by blocking feeble currents. A manual controller MC selects accelerating or braking operation, and also switches a resistor network 23 in a bias winding 22 to give different notching rates for the two conditions. Anaclclitional bias winding 24 is connected to a differential transformer 34 which has a core 35 moved by the manual controller in such a way that the braking rate at least can be varied by movement of the controller. The transformer and the magnetic amplifier are supplied from a static inverter IV. During acceleration the motors operate as series machines connected in parallel, but for dynamic braking armatures and fields are cross-connected through a common resistor BR.
Application Number:
JP1650464A
Publication Date:
July 12, 1965
Filing Date:
March 26, 1964
Export Citation:
International Classes:
B60L15/04; B60L15/10