Patent GB-190720785-A (GB)
Title: Improvements in or relating to the Electrical Transmission of Power for Propelling Vehicles of all kinds.
Inventor: WERKNER RICHARD
Filed: 1907-09-18
Granted: 1908-09-10
Abstract: 20,785. Werkner, R. Sept. 18. Dynamos and motors combined for transmitting power.-Electrical power transmission systems for vehicles or ships of the kind in which the vehicle &c. is driven at normal speed direct by a heat engine and at reduced or increased speed by electromotors, are provided with an accumulator battery so that the prime mover works with uniform output under all conditions. The figure shows the general arrangement of heat engine, dynamo, and motor as applied to a railway vehicle, and the details of the controller. The vehicle, at the normal speed of travelling, is driven directly by the heat engine A through the friction clutch K, and, while starting or travelling at reduced or increased speed, by electric motors M<1>, M<2>, which are supplied with current from the dynamo D or the battery arranged in parallel with the dynamo, the system of control being such that the heat engine may work continuously at uniform speed and power. The heat engine may be connected directly to one axle only, the electric motors being distributed on the other axles of the vehicle or trailer cars. The motors are shunt wound, and the exciting wire T is provided with joint regulation resistances w<1>, w<2>. The small switch S' is intended for reversing. The resistances W<1>, W<2>,: W<3> may be switched into the armature circuit. In the positions 1 ... 6 of the main switch S, the motor armatures are in series. In the position 1 only the resistance w' is switched into the exciting circuit, the resistance w<1> being short-circuited. In the positions 2, 3, 4 the resistances W<1>, W<2>, W<3> are successively short-circuited and the speed thus increased. In the position 5 both resistances w<1>, w<2> are switched into the exciting circuit so as further to increase the speed, while in position 6 the resistance w<1> is again shott-circuited and the current through the armature thus reduced, so that on passing into position O<1> the armature circuit may be broken without sparking. In the position 7 ... 14, the armatures are switched in parallel and increases of speed obtained in a similar way. In position 12, the resistance w<1> is again switched into the exciting circuit, this resistance being of such an amount that the shaft of the heat engine and the shaft carrying the motors rotate at the same speed, so that on passing into position 13, the two shafts are coupled by means of the friction clutch K which is operated by the solenoid Z<1>. On passing into position 14 the current through the armature is cut off without sparking, and in position 15 the exciting circuit is switched out. On moving back the controller, the clutch is disconnected by the solenoid Z<2> and the reduction of speed obtained without shocks or sparking as when increasing speed. Braking may be effected by putting the switch S<2> into the left-hand position, the switch S<1> being in the right-hand or forward position. The adjustment of the switch S<2> may be effected automatically when reversing the direction of rotation of the main switch S. Before stopping, the switch S may be moved into the left-hand braking position 1 ... IV. In the application to a whole train, the wires 0, P, Q, R, T, U would extend along the train, or only two through highpressure wires need be used, a multiple central system being employed, in which each vehicle contains separate switches controlled by a controller switch on the leading vehicle. This system of control can also be applied to series-wound motors. The vehicle can also be electrically lighted by connecting the lamps y across the two main leads.