SI9012274B - Method and apparatus for propelling and retarding off-road haulers - Google Patents

Claims (8)

1 Patent claims The electric propulsion and distribution system for vehicles, comprising: an alternating current network (118, 218); an alternating current generator (116, 216) that is coupled to said alternating current network and adapted for connection to an internal combustion engine (112, 212); a motor (132, 232) to a direct current having an excitation coil (162, 262) and an angle; an inductor converter (158, 258) for supplying a current from said network to a drive current of the motor to a direct current which (the excitation converter) is responsive to the signals received at the control input; a boiler converter (124, 224) for supplying current from said alternating current network to the motor current to the direct current, which (the boiler) is responsive to the signals received at the control input, and the control means (106, 206) for controlling said inverters; characterized in that the current-receiver converter (184, 284) having DC connections, control inputs and alternating current connections coupled to said alternating current network for directing the direct current input to said DC connections, and feeding a directed DC current to said alternating current network, which (the current-receiver transceiver) reacts to the signals received at the control input of said current-collector converter; and wherein said controller (166, 266) comprises outputs coupled to the control input of said current-collector converter, the control input of said excitation transducer and the control input of said converter, said controller comprising also an input for detecting the direct current input said controller for controlling said excitation transducer and said converter for supplying current from the alternating current network 5 2 to said excitation winder or said alternating current converter. and for switching said current-receiver converter in such a way that the directed DC current is fed to said alternating-current network simultaneously with the supply of alternating current to said alternating current network from the alternating current generator. 2. The system of claim 1, further characterized by said controller having inputs for receiving parameters of velocity commands, boiler current and excitation winding current so that said controller also serves for controlling said current-collector in such a way that, as a reaction to said inductor converter and a boiler converter that supply sufficient current from said alternating current network, said alternating current network supplies said alternating current generator as a synchronous motor. The system of claim 1, further characterized by said current-collector converter, comprising a three-phase full-time controlled thyristor converter. The system of claim 1, further comprising a network current coupling means (188, 288) for electrically connecting said DC link to the overhead line of the direct current. 5. The system of claim 4, further characterized by said alternating current generator, adapted to function as an electric motor to alternating current, to supply power to the internal combustion engine when an electric current is supplied to the DC connections, so that the flow from the flow-to-receiver line to the direct current is used to relieve the internal combustion engine. The system according to claim 1, further characterized by said boiler converter comprising a single boiler thyristor converter (224) connected to said alternating current network and after said motor at 30 6. The 3D current comprising a pair of motors (232, 234) to the direct current for the drive of wheels, which are coupled serially on the side of the direct current of said single boiler thyristor converter. The system of claim 6, further characterized by said excitation current converter comprising: a pair of excitation current windings (262, 264), wherein each of these excitation current windings is electrically connected to a suitable exciter current converter and belongs to one of said two series-connected motors to the DC drive for driving the wheels, so that said controller can independently control each of said thyristor actuators of the excitation current. A method of operating an electric propulsion and distribution system for a vehicle, said vehicle comprising an internal combustion engine (112, 212), an alternating current alternating current generator (116, 216) for generating alternating current from said motor and supplying it to a network (118 , 218) of the alternating current, a flow-converter converter (184, 284) which is coupled to said alternating current network and the direct current connectors (190, 290) on which the external direct current is received, and the electric drive motor (132, 232), which is coupled to said alternating current network via an auxiliary inverters (158, 258) and angled converters (124, 224), characterized by the following steps: detecting the presence of a direct current input to said DC connections; discharging said direct current flowing to said DC link terminals into alternating current with said flow-to-receiver converter; switching the current-receiver converter for supplying said diverted direct current to said alternating current network simultaneously and in combination with alternating current from said alternating current generator and supplying said electric drive motor with said diverted direct current in combination with an alternating current of 4 of said alternating current generator stream. The method of claim 8, further characterized by an additional step: supplying said alternating current generator as a synchronous 5 motor with said diverted direct current. The method of claim 8, further characterized by additional steps: activating a braking method by controlling said motor converter so that the current is fed to said alternating current network 10 with said motor so that said alternating current generator is supplied as a synchronous motor; and coupling the inhibitory load (176, 276) to the alternating current network between said inhibitory means in order to drain the excessive energy that said motor has brought to said alternating current generator. 15 The method of claim 10, further characterized by said coupling, comprising: connecting said braking load to said DC connections. 20 A method according to claim 8, further characterized by a power supply comprising: supplying alternating current from said alternating current generator to alternating current networks; supplying alternating current from the AC current network to the first thyristor 25 converter (158, 258; 124, 224); converting the alternating current into a direct current in said first thyristor converter; supplying a DC current from said first thyristor converter to said electric drive motor. 30 The method of claim 12, further characterized by additional steps: use of a diversified DC current for propagating said alternating current generator as an alternating current motor; and ο propelling an internal combustion engine from said alternating current generator acting as an alternating current motor. An electric propulsion and distribution system for a vehicle, comprising: an alternating current network (118, 128); an alternating current generator (116, 216) coupled to said alternating current network and adapted for connection to an internal combustion engine (112, 212); a motor (132, 232) to a direct current having an excitation coil (162, 262) and an angle; means for converting the current from said alternating-current network to the excitation winding and motor current to the direct current reacting to the signals received at the control input, and a controller (166, 266) for controlling said converters (158, 258, 124, 224) funds; characterized by: an inhibitory load (176, 276) connected to said DC connections; and an AC / AC inverter (184, 284) having DC connections, a control input, and alternating current couplings with said alternating current network, for directing the DC current supplied to said DC connections, and feeding the feeder a direct current to said alternating current network, which (current-receiver / inhibitor converter) is responsive to the signals received at the control input of said current-receiver / inhibitor converter; said controller (166, 266) comprising outputs coupled to the control input of said current-receiver / inhibitor converter with a control input of said conversion means, said controller also comprises an input for sensing a direct current input to said DC link terminals said controller for controlling said conversion means in order to bring the current from said alternating current network to said excitation winding and the Ο angle and for switching said current-receiver / inhibitor converter in such a way that the directed direct current flows to said alternating current network; and wherein said controller, in braking mode, also serves for controlling said conversion means for inverted current flow to the DC motor so that the current is fed to said alternating current network in such a way that said alternating current network supplies said alternating current generator flow as a synchronous motor, and also serves to control said current-receiver / inhibitor converter in such a manner that said retention load receives current from said alternating current network. The system of claim 14, further characterized in that said braking load comprises a resistor (176, 276) and a diode (178, 278) which are connected between the said DC link connections in such a way that, when the DC current brought to said DC link connections, said diode is oriented reversely. The system of claim 14, further characterized in that said conversion means comprise: an inductor converter (158, 258) for supplying current from said alternating current network to the motor inductor winding to a direct current which (the inverter converter) reacts to signals received at control input; and a corner converter (124, 224) for supplying current from said alternating current network to the motor current to the direct current, which (the boiler) is responsive to the signals received at the control input; and wherein said controller, in a braking mode, controls said inducer converter so as to supply the inverted current to the excitation winding, so that said corner converter delivers current to said alternating current network. The system of claim 14, further characterized in that said braking load comprises: 7 braking resistors (176, 276) which, when said system operates in a reversed mode, is adapted for the consumption of electricity generated by the motor to the direct current .; an inhibitory resistor thyristor conversion means (184, 284) electrically connected to said alternating current network and to said inhibitory resistor means, said braking resistor thyristor conversion means comprising means for receiving alternating current from said alternating current network and feeding one-way electric current to said inhibitory resistance means; and that said controller is also electrically connected to said inhibitory resistor thyristor conversion means for controlling the operation of said inhibitory resistor thyristor conversion means to control the direction and size of the torque applied by said motor to the DC current so that when said system operates in said braking mode, the electric power generated by said motor in direct current can first be used to reduce power requirements for the internal combustion engine, wherein the excess energy generated by the motor on the direct current is brought to said inhibitory resistor. The system of claim 17, further characterized by a means (188) for connecting to a network current for selectively connecting said system to a direct current supply source outside said vehicle, and for supplying said external mains current to the side of said direct current of said inhibitory resistor thyristor conversion means, so that the external network direct current with said inhibitory resistor thyristor converters is converted into alternating current and is brought to said alternating current network to compensate for the alternating current generated by said alternating current generator and reduces engine power requirements with an internal combustion. 3 19. The system of claim 17, further characterized by said means for connecting to a network current, which is connected to the DC voltage of the opposite polarity, as usually exists on said braking resistor means, and additionally comprise a power diode (178, 278), 5 coupled between said means for connecting to a network current and said inhibiting resistor means such that, when said external network direct current is connected to said system via said means for connection to a network current, the opposite polarity of the DC network is rotated by the orientation of the power diode, and 10 blocking the supply of the mains direct current into said inhibiting resistor means, while permitting said supply current to flow into said inhibitory resistor thyristor conversion means for converting to alternating current. The system of claim 17, further characterized in that said braking resistor means: a series of stage resistors adapted to convert excessively generated electrical energy into heat; and a heat exchanger (156, 256) produced by said resistors.