1846 results about "Electric locomotive" patented technology

Prior battery-powered electric locomotives have used multiple diesel engines to charge the batteries and have not been commercially accepted. The present invention provides a yard switcher which combines battery storage with a gas microturbine generator to provide an effective fuel-efficient and environmentally friendly locomotive. locomotive.

Designs for a battery-powered, all-electric locomotive and related locomotive and train configurations are disclosed. In one particular exemplary embodiment, a locomotive may be driven by a plurality of traction motors powered exclusively by a battery assembly which preferably comprises rechargeable batteries or other energy storage means. The locomotive carries no internal combustion engine on board and receives no power during operation from any power source external to the locomotive. A battery management system monitors and equalizes the batteries to maintain a desired state of charge (SOC) and depth of discharge (DOD) for each battery. A brake system may be configured to prioritize a regenerative braking mechanism over an air braking mechanism so that substantial brake energy can be recovered to recharge the battery assembly. Many locomotive or train configurations involving battery-powered or battery-toting locomotive(s) may be implemented. In one embodiment, a battery-toting locomotive is directly coupled with and positioned between two diesel-electric locomotives, wherein the batteries recover energy from regenerative braking and/or supply power to drive traction motors.

Designs for a battery-powered, all-electric locomotive and related locomotive and train configurations are disclosed. In one particular exemplary embodiment, a locomotive may be driven by a plurality of traction motors powered exclusively by a battery assembly which preferably comprises rechargeable batteries or other energy storage means. The locomotive carries no internal combustion engine on board and receives no power during operation from any power source external to the locomotive. A battery management system monitors and equalizes the batteries to maintain a desired state of charge (SOC) and depth of discharge (DOD) for each battery. A brake system may be configured to prioritize a regenerative braking mechanism over an air braking mechanism so that substantial brake energy can be recovered to recharge the battery assembly. Many locomotive or train configurations involving battery-powered or battery-toting locomotive(s) may be implemented. In one embodiment, a battery-toting locomotive is directly coupled with and positioned between two diesel-electric locomotives, wherein the batteries recover energy from regenerative braking and/or supply power to drive traction motors.

The invention discloses an electric locomotive pantograph copper-impregnated carbon contact strip producing method. The method comprises the steps that 1, pitch coke powder, graphite powder, siliconized graphite powder and high temperature pitch are mixed according to the proportion to be ground into powder; the mixed powder is prepressed into a stage stock column, and then the stage stock column is solidified and squeezed to be molded and roasted, so that a composite carbon contact strip is obtained; 2, the composite carbon contact strip is cleaned and dried, then is cooled and placed into a graphite crucible, and is placed in an electric furnace at temperature of 1300-1400 DEG C to be preheated; copper liquid is poured into the crucible to soak the composite carbon contact strip, then the crucible is placed in an oil press cover, nitrogen is led in, heat preservation is kept for 3-5 min under the specific intensity of pressure, and finally cooling is carried after pressure releasing. According to the electric locomotive pantograph copper-impregnated carbon contact strip producing method, the electroconductibility of the copper-impregnated carbon contact strip is improved, the electrical resistivity is lowered, the mechanical strength of the carbon contact strip and copper impregnated angle can be increased, then the carbon contact strip abrasive resistance and self-lubrication are improved, the copper-impregnated carbon contact strip is more resistant to abrasion, main line damage and block dropping are avoided, the shock resistance is high, and the service life of the copper-impregnated carbon contact strip is prolonged.

The invention relates to an electric locomotive non-power-off neutral section passing-electric energy quality comprehensive compensation device and method, which belongs to the technical field of railway transport equipment and electric electronics. The device comprises a controllable transfer switch, a single-phase step down transformer, a single-phase step down transformer with a middle tap, a two-phase back-to-back converter sharing a DC-side capacitor, a circuit breaker switch, four position sensors and three electric quantity sensors. In the method, when the electric locomotive passes the neutral section, the controllable transfer switch is turned off, and the device works in a non-power-off neutral section passing mode to perform control on amplitude and phase of the neutral section voltage and enable the electric locomotive to pass the neutral section with load in a non-power-off manner. Without locomotive passing, the controllable transfer switch is closed, and the device works in an electric energy quality comprehensive compensation mode and has functions of active power transfer as well as inactive power and harmonic compensation. Through the device, the problems relating to electric energy quality of a traction substation and neutral section can be comprehensively solved based on the traditional traction power supply mode.

The invention relates to an ice melting method for overhead contact system of an electrified railway and an ice melting system thereof. Major hazards of ice coating of the overhead contact system include accidents that pantograph of electric locomotives can not contact with a contact line to obtain current, contact system brandishes, even falls of piles and collapses, and the like. In the ice melting method and the ice melting system thereof, an upper overhead contact system and a lower overhead contact system are connected in series to form a circuit by a section post, AC or DC ice melting current is input at the head end of the circuit, ice coating thickness and safe ice melting current value are obtained by analyzing meteorological and overhead contact system parameters with an ice coating data processing and control module, and then the ice melting system is controlled to output the ice melting current at the end of the circuit, thus ice is molten by Joule heat generated by the current. In the ice melting method and the ice melting system thereof, ice attached to the contact line is molten by joule heat, and compared with the deicing modes of artificial knock and the like of operation departments, the ice melting method and the ice melting system thereof greatly improve deicing efficiency, thus reducing the effect on railway transport, and eliminating damages of external force on the contact line.

The invention discloses a novel method and a novel device for phase separation control of ground surface over-current. The method comprises the followings steps of: determining A and B phase voltage phases of a contact line according to locomotive position sensors CG1, CG2, CG3 and CG4 arranged on a rail and contact line voltage phase detection modules M1 and M2 used for detecting the voltage phases of the contact line; and using a controller to control the connection and the disconnection of switching devices K1 and K2 consisting of full-control type power electronic devices so as to realize ground surface bumpless transfer over-current phase separation of an electric locomotive. The method and the device realize the bumpless transfer of the electric locomotive (a motor train unit) during the ground surface over-current phase separation so as to avoid the generation of a cut-off current over-voltage and a switch-on surge over-current, and reduce requirements on the switching devices. The method and the device have a high switching speed and can short the power-cut time for a train to pass through a phase separation area.

A locomotive diesel engine waste heat recovery system for converting waste heat of engine combustion into useful work. A thermoelectric module is connected to the hot engine exhaust to provide a high temperature heat source, and the engine coolant system is also connected to the thermoelectric module to provide a low temperature heat source. The difference in temperature of the heat sources powers the thermoelectric module to convert waste heat of the engine into electricity to power selected devices of the locomotive.

The invention discloses an electrical locomotive auto-passing neutral section control system. In the control system, a signal generator used for transmitting passing neutral section anticipating signal is arranged on a vehicle mainframe of an electrical locomotive, wherein the vehicle mainframe comprises a signal receiver used for receiving the passing neutral section anticipating signal, a memory unit used for storing the required time of locomotive neutral section operation, a clock, a speed sensor used for providing the current speed of the electrical locomotive for a controller, the controller used for outputting passing neutral section control signal and restoring the control signal and a contact network connection controller used for controlling a contact network electrical connection device. The timing that the invention executes the auto-passing neutral section operation is accurate and the reliability of the auto-passing neutral section control is high.

The invention discloses a power supply system for an electric locomotive. The power supply system comprises an external power supply, a traction invertor, an auxiliary invertor and a charger, wherein the charger comprises a first three-phase bridge-type inversion circuit; the alternating current side of the first three-phase bridge-type inversion circuit is connected with the low voltage side of a first three-phase transformer and the direct current side of the first three-phase bridge-type inversion circuit is connected with a storage battery; and the high voltage side of the first three-phase transformer is coupled to the output end of the auxiliary invertor. The power supply system for the electric locomotive can supply power to a traction motor by using the storage battery when a contact network fails; and low speed running of the electric locomotive can be retained.

The invention discloses an automatic passage method through phase splitting for an AC-DC-AC electric locomotive which comprises the following steps: before the electric locomotive runs into a neutral section, a traction control system controls a traction motor to work in a regenerative braking mode and controls an inverter to stabilize intermediate DC voltage; a pulse rectifier works in an inversion state; an alternating voltage equal to a traction voltage is generated on the primary side of a traction transformer, thereby making the primary side of the traction transformer obtain zero current from a power supply arm; after the electric locomotive runs into the neutral section, the intermediate DC voltage still maintains stability; the AC phase generated by the inversion of the pulse rectifier in the inversion mode changes gradually so as to make the voltage of the primary side of the traction transformer change to become equal to the traction voltage of a next power supply arm; and then the electric locomotive enters the next power supply arm and runs normally. The method enables the automatic passage through phase splitting; in addition during the phase splitting, a main circuit breaker does not need to be turned on and off without arc discharge, interception overvoltage and closing surge overcurrent, and an auxiliary system is not deenergized; and the passage through phase splitting has short time, low traction loss and small speed drop.

The present invention relates to vehicle fittings. The carbon fiber reinforced slide plate for pantograph of electric locomotive is manufactured with graphite, electrolytic copper powder/copper fiber as conducting stuffing, carbon fiber as reinforcing material and heat resisting modified phenolic resin as adhesive and through hot pressing. It has excellent friction performance, long service life, few wear of contacted wire, excellent mechanism performance and impact strength as high as ten times that of metal soaked carbon slide plate. The manufacture process has low cost, low power consumption and short period. The carbon fiber reinforced slide plate may be used in pantograph for rail transportation.

The invention discloses an electric locomotive fault prediction and health management method. Sensors arranged in and out of an electric locomotive are used for collecting and monitoring state characteristic parameter data of different components of the electric locomotive and external environmental parameter data in real time; the parameter data is arranged, compressed and coded and sent to a ground processing center through a wireless network; the ground processing center receives the data transmitted from the electric locomotive and establishes state evaluation models for the different components of the electric locomotive through fuzzy logic to analyze corresponding data obtained after extraction is carried out according to time sequence classification, and by means of estimation, the performance, states and health situations of the different components of the electric locomotive are obtained; a fault prediction model is established based on an artificial neural network through a fault foreboding and failure mechanism diagnosing and predicting method, fault prediction is carried out, the residual life is calculated, and data is recorded to form a historical database. By means of the electric locomotive fault prediction and health management method, fault prediction can be automatically carried out, the residual life of the components can be calculated, and health management of the electric locomotive can be achieved.

This invention relates to a hybrid fiber reinforcement compound material pantograph slide plate with lamination used in railway electric locomotives and its preparation method, which takes a metal net and hybrid fiber reinforcement compound material as the backing of said slide plate and makes them distribute in lamination, among which, phenolic resin is taken as the matrix, hybrid fiber as the reinforcement agent, rubber, graphite, copper powder, baritite and at least three kinds in SiO2 as the friction performance modifiers of the compound material to be mixed fully to be hot-pressed with the metal net to form a pantograph slide plate.

The invention relates to electric lubricating grease and a preparation method thereof, and in particular relates to electric lubricating grease used for a terminal in the electric locomotive and power industries and a preparation method thereof. A fatty acid soap-type thickening agent is weighed in proportion and is added into base oil to be mixed, stirring and slow heating are carried out, then the base oil is continuously added, stirring and heating are continuously carried out, and then the base oil is added, and mixing is carried out and homogenizing by virtue of a homogenizer or grinding by virtue of a grinding machine is carried out, thus base ester is obtained; and an anti-oxidation additive, an anti-corrosion additive, an anti-rust additive, a conductive additive and an anti-static additive are sequentially added into the obtained base ester and mixed; and then the mixture is homogenized by virtue of the homogenizer or ground by virtue of the grinding machine; and finally filtering and packaging are carried out to obtain the electric lubricating grease product. The lubricating grease provided by the invention has excellent conductive performance, contact condition of an electric contact is effectively improved, and antiseptic and antirust performances of the electric contact are obviously improved. The electric lubricating grease product can be widely applied to the electric contact of an electric locomotive and a power supply system.

The invention discloses a network-side circuit of an electric locomotive unit, which comprises two network-side circuit bodies with pantographs. Each network-side circuit body consists of a high-voltage transformer, the pantograph, a high-voltage isolating switch, a main circuit breaker, a grounding switch, a lightning arrestor, a primary-side high-voltage current transformer, a transformer, a primary-side grounding current transformer and a shaft end grounding device. The high-voltage circuit of the electric locomotive unit further comprises a high-voltage circuit body without a pantograph, the high-voltage circuit consists of a main circuit breaker, a grounding switch, a lightning arrestor, a primary-side high-voltage current transformer, a transformer, a primary-side grounding current transformer and a shaft end grounding device. The three high-voltage circuit bodies are connected by roof high-voltage buses and high-voltage connecting cables. The network-side circuit of the electric locomotive unit can meet the requirement of heavy-load and high-power traction, an optional network-side high-voltage electric component can be isolated when breaking down, and power loss of an integral locomotive is minimized assuredly after fault isolation.

The present invention relates generally to hybrid versions of diesel-electric locomotives and improves the previous art by placing such batteries in standard intermodal containers which can easily be moved by readily available cranes built for the purpose of moving freight containers. The containers housing the batteries are standardized, so that different operators can use them by way of purchase or rental. The invention produces the following advantages. (1) After a descent from high altitudes, a full battery unit can be removed from a train and put in storage to reduce the weight of the train should no extra power be needed for the next leg of the journey. On particular long descents, full battery units can be replaced by empty ones several times to enable further energy recovery as the train continues its way down the mountain. (2) Conversely, a train heading for the mountains can be loaded with one or more full battery containers from storage to reduce the use of fossil fuels during the ascent and, if need be, receive replacement units on the way should the original set not last long enough to reach the high point. (3) Different configurations become possible such as two containers, one on top of the other, to accommodate different requirements. (4) The commercial trade of battery containers, made possible through standardization, will create a market for energy which will result in its most efficient use.

The invention relates to an identifying method for the line breaking and ground faults of an AT power supply contact network of an electrified railway which comprises: judging and identifying whether an element achieves the starting condition or not; calculating a real time power factor according to a bus voltage and a feeder line current; calculating the self-adapting control amount and the secondary harmonic content according to the harmonics 1. 2, 3, 5 and 7 of the feeder line current; judging whether the power factor regulated by the self-adapting control amount and the self-adapting control amount are in the motion range or not and judging whether the secondary harmonic content is smaller than a setting value or not; if yes, all the conditions can be met; then giving out alarming signal or tripping, uploading the failure data information; or quitting and initializing the identifying element. The identifying method can identify the high impedance failure formed by line breaking and grounding and ensure the identifying element for the feeder line protection device of a microcomputer to be not mistakenly moved when various electric power engines run under load, under the temporary state of exciting surges and under the working condition of heavy load; simultaneously, the identifying method solves the problem of failure to operate of the normal protections after the stepout of the AT (autotransformer).

The invention discloses a cascaded multi-level-based ground overvoltage phase splitting device. The cascaded multi-level-based ground overvoltage phase splitting device is characterized in that the position of a train is determined by the aid of locomotive position sensors CG1, CG2, CG3 and CG4 which are arranged on a rail, a ground overvoltage phase splitting device which is connected to two adjacent phases outputs single-phase alternating-current voltages under the control, and amplitude values, frequencies and phases of the voltages are identical to an amplitude value, a frequency and a phase of a voltage of an A-phase bridge arm when the train is positioned on an A-phase bridge arm side; when an electric locomotive enters a neutral section, output voltage which is identical to the A-phase voltages the amplitude values, the frequencies and the phases of the A-phase voltages is converted to be identical to the B-phase amplitude values, frequencies and phases of the B-phase voltages. The cascaded multi-level-based ground overvoltage phase splitting device has the advantages that flexible passing voltage phase splitting can be implemented on the electric locomotive (or a motor train unit) by the aid of the cascaded multi-level-based ground overvoltage phase splitting device, impact on an overhead line system and the electric locomotive (or the motor train unit) can be prevented, and requirements on switch devices can be lowered; uninterrupted power supply passing voltage phase splitting can be implemented on the train; the cascaded multi-level-based ground overvoltage phase splitting device has an important significance on implementing through type power supply on the overhead line system with electric phase splitting.

The invention provides an electric locomotive adhesion control method and a device. The method comprises the following steps: collecting rotating speed information of locomotive wheel shafts at real time; performing digital filtering processing of the rotating speed information, then converting into digital signals; determining whether the locomotive is in a coasting state according to the digital signals, if yes, calculating a wheel diameter correction coefficient according to the rotating speed information of two driving wheels when receiving a wheel diameter compensation control instruction, and if no, calculating a corresponding adhesion control coefficient according to the collected rotating speed information based on an established adhesion control type-II fuzzy model; and adjusting a correction coefficient of a traction motor torque given value according to the wheel diameter correction coefficient and the adhesion control coefficient based on a preset correction rule. The invention realizes the intelligentization of adhesion control, effectively improves the adhesion utilization rate between wheel tracks, and realizes optimization utilization of available adhesion strength of electric locomotive.

The embodiment of the invention discloses a method and device for controlling power supply of double energy sources. The method comprises the steps of: judging a power supply mode selected by a locomotive currently based on a locomotive state; when a contact network power supply mode is selected, controlling break-over of a power supply loop of a contact network at the absence of a fault which results in power supply switch-on prohibition of the contact network; and when a power storage battery power supply mode is selected, controlling break-over of a power supply loop of a power storage battery at the absence of a fault which results in power supply switch-on prohibition of the power storage battery. Through the method disclosed by the invention, the locomotive can select a suitable power supply mode based on the practical condition, and can work normally by switching to the power storage battery power supply mode when no contact network exists so as to enhance application adaptability of an electric locomotive.