CN214141272U - Pure electric driving system of high-speed railway crane supporting trolley - Google Patents
Pure electric driving system of high-speed railway crane supporting trolley Download PDFInfo
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- CN214141272U CN214141272U CN202023043622.2U CN202023043622U CN214141272U CN 214141272 U CN214141272 U CN 214141272U CN 202023043622 U CN202023043622 U CN 202023043622U CN 214141272 U CN214141272 U CN 214141272U
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Abstract
The utility model provides a high-speed railway crane supports pure electric drive system of platform truck, replace traditional engine with driving motor, through set up storage battery and super capacitor on supporting the platform truck, and before getting into the rescue scene, be full of the electricity for storage battery and super capacitor through hoist owner car power, davit flatcar power, the power supply net, portable battery charging outfit or portable battery charging outfit, provide the electric energy for driving motor with storage battery and super capacitor, can realize railway crane at the scene of rescue continuity of operation.
Description
Technical Field
The utility model relates to a railway rescue hoist's support platform truck field especially relates to high-speed railway hoist support platform truck pure electric drive system.
Background
When the high-speed rail crane performs hoisting operation, the fulcrum counter force of a single supporting leg is large, and if the supporting leg of the crane is directly supported on a track above a bridge, concentrated force can generate large influence on the bridge structure, so that the safe operation of a railway is threatened. The existing railway rescue crane usually adopts the support trolley shown in figure 1 to transmit the concentrated load of the crane support legs to the bilateral railway tracks in a dispersed manner through four pairs of wheels, so that the problems of large concentrated load force and load traveling of the crane support legs to the railway tracks are effectively solved, the longitudinal movement of the crane support leg structure along the longitudinal beam, the lifting movement in the direction vertical to the longitudinal beam and the rotating movement relative to the longitudinal beam are realized, and the crane is endowed with the operating performance of traveling movement and rotating operation through the support leg mechanism.
However, when the crane is used for a severe working environment or a working condition for rescue in a working environment with a long distance and a high altitude, the supporting trolley is driven to work by the power generated by the combustion of diesel oil in the diesel engine, the air in the working environment is thin, oxygen in the working environment can be consumed by the combustion of the diesel oil in the diesel engine, when the oxygen is insufficient, the diesel engine cannot work, at the moment, the supporting trolley is not driven by the power and cannot advance, and further the crane cannot be driven to realize the functions of moving and rotating, and the purpose of timely and quick rescue cannot be realized. Therefore, in order to solve the problem, the utility model provides a high-speed railway hoist supports pure electric drive system of platform truck, through set up energy storage equipment and for the charging device that energy storage equipment charges on supporting the platform truck, before supporting the platform truck and getting into the rescue scene, charge for energy storage equipment, when rescue site environment is more abominable, switch the energy storage equipment power supply, avoid supporting the platform truck because lack of electricity and cause the unable condition gone on of rescue work.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a high-speed railway hoist supports pure electric drive system of platform truck, through set up energy storage equipment and for the charging device that energy storage equipment charges on supporting the platform truck, before supporting the platform truck and getting into the rescue scene, charge for energy storage equipment, when rescue scene environment is more abominable, switch the energy storage equipment power supply, avoid supporting the platform truck because lack of electricity and cause the unable condition gone on of rescue work.
The technical scheme of the utility model is realized like this: the utility model provides a pure electric driving system of a high-speed railway crane supporting trolley, which comprises a supporting trolley and an external power supply, wherein the supporting trolley is provided with a driving motor, an energy storage device, an inversion module, a charging management system and a controller;
the external power supply comprises a crane main vehicle power supply, a suspension arm flat vehicle power supply, a power supply network, portable charging equipment or movable charging equipment;
the crane main vehicle power supply, the suspension arm flat vehicle power supply, the power supply network, the portable charging equipment or the mobile charging equipment charge the energy storage equipment through the charging management system, and the charging management system monitors the electric quantity of the energy storage equipment in real time and sends a detection result to the controller; the energy storage device is electrically connected with the input end of the inversion module, the inversion module inverts the direct-current voltage output by the energy storage device into alternating current, the output end of the inversion module is electrically connected with the power supply end of the driving motor, and the driving motor is assembled and connected with a gear shaft of a driving wheel shaft on the support trolley; when the engine does not operate, the energy storage device provides electric energy for the driving motor through the inversion module so as to drive the supporting trolley to run.
On the basis of the above scheme, it is further preferable that the energy storage device includes a storage battery and a super capacitor;
the crane main car power supply, the crane jib flat car power supply, the power supply network, the portable charging equipment or the mobile charging equipment are respectively and electrically connected with the two ends of the super capacitor and the anode and the cathode of the storage battery through the charging management system, and respectively charge the storage battery and the super capacitor, and when the storage battery and the super capacitor are fully charged, the storage battery and the super capacitor respectively supply power to the driving motor through the inversion module.
On the basis of the above scheme, it is further preferable that the inverting module includes a first bidirectional DC/DC converter, a second bidirectional DC/DC converter, and a PWM converter;
the first bidirectional DC/DC converter performs boost conversion on the direct current output by the storage battery pack to convert the direct current into direct current with adjustable voltage;
the second bidirectional DC/DC converter performs boost conversion on the direct current output by the super capacitor to convert the direct current into direct current with adjustable voltage;
the PWM converter rectifies direct currents output by the first bidirectional DC/DC converter and the second bidirectional DC/DC converter, and rectified electric signals are input to a power supply end of the driving motor;
the positive output end and the negative output end of the storage battery pack are electrically connected with the input end of the PWM converter through the first bidirectional DC/DC converter respectively, the super capacitor is electrically connected with the input end of the PWM converter and the output end of the first bidirectional DC/DC converter through the second bidirectional DC/DC converter respectively, and the output end of the PWM converter is electrically connected with the power supply end of the driving motor.
Further preferably, the charging management system comprises a 12-pulse rectifier, a digital phase-shift trigger circuit and a full-bridge power conversion circuit;
the 12-pulse rectifier converts three-phase alternating current provided by an external power supply into direct current and transmits the direct current to the storage battery pack and the super capacitor;
the digital phase-shift trigger circuit regulates the output direct-current voltage of the 12-pulse rectifier;
the full-bridge power conversion circuit converts the direct current output by the 12-pulse rectifier into alternating current and then converts the alternating current into direct current to complete the conversion of DC-AC-DC;
the input end of the digital phase-shift trigger circuit is electrically connected with the controller, the output end of the digital phase-shift trigger circuit is electrically connected with the control end of the 12-pulse rectifier, the external power supply is electrically connected with the input end of the full-bridge power conversion circuit through the 12-pulse rectifier, and the output end of the full-bridge power conversion circuit is electrically connected with the two ends of the super capacitor and the positive output end and the negative output end of the storage battery pack.
Further preferably, the charge management system further includes a discharge depolarization circuit;
the discharge depolarization circuit is connected in parallel between the positive output end and the negative output end of the storage battery pack.
Further preferably, the discharge depolarization circuit includes: the circuit comprises an inductor L8, a capacitor C5, a diode D5, a resistor R7 and a triode Q17;
one end of an inductor L8 is electrically connected with the anode of the storage battery pack, the other end of the inductor L8 is electrically connected with the collector of a triode Q17 and the cathode of a diode D5 respectively, the base of the triode is electrically connected with a controller, a capacitor C5 is connected in parallel with the two ends of the collector and the emitter of a triode Q17, the emitter of the triode Q17 and the anode of the diode D5 are electrically connected with one end of a resistor R7 respectively, and the other end of the resistor R7 is electrically connected with the cathode of the storage battery pack.
The utility model discloses a high-speed railway crane supports pure electric drive system of platform truck has following beneficial effect for prior art:
(1) the traditional engine is replaced by the driving motor, the storage battery pack and the super capacitor are arranged on the supporting trolley, the storage battery pack and the super capacitor are fully charged by a main vehicle power supply, a suspension arm flatcar power supply, a power supply network, portable charging equipment or mobile charging equipment of the crane before entering a rescue site, and the storage battery pack and the super capacitor provide electric energy for the driving motor, so that the continuous operation of the railway crane on the rescue site can be realized;
(2) by arranging the first bidirectional DC/DC converter and the second bidirectional DC/DC converter, when the discharge amount of the storage battery pack is more than the demand amount of the driving motor, the residual amount of electricity is absorbed by the super capacitor through the first bidirectional DC/DC converter and the second bidirectional DC/DC converter; when the driving motor decelerates or brakes, the generated braking energy is rectified by the PWM converter, is subjected to buck conversion by the second bidirectional DC/DC converter and then is input into the super capacitor, so that the electric quantity of the super capacitor is supplemented, and energy feedback is realized;
(3) by arranging the 12-pulse rectifier, 6n +/-1 times of harmonic waves in a power grid can be suppressed, and the power factor is improved;
(4) the digital phase-shifting trigger circuit can meet the trigger requirement of the 12-pulse rectifier.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of the supporting trolley of the pure electric high-speed railway crane of the utility model;
FIG. 2 is a structural diagram of the pure electric driving system of the high-speed railway crane supporting trolley of the invention;
FIG. 3 is a structural diagram of a digital phase shift trigger circuit in the pure electric driving system of the high-speed railway crane supporting trolley of the utility model;
fig. 4 is the circuit diagram of the full-bridge power conversion circuit and the discharge depolarization circuit in the high-speed railway crane supporting trolley pure electric driving system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in figure 2, the utility model discloses a high-speed railway crane supports pure electric drive system of platform truck for drive high-speed railway crane auxiliary stay platform truck. The structure of the supporting trolley is shown in figure 1. At present, a support trolley generally runs in an engine driving mode, oxygen in a working environment is consumed by fuel combustion in an engine, and when the working environment is severe, the engine cannot work and cannot implement rescue work. Therefore, in order to solve this problem, in the embodiment, the support trolley is driven to run by a pure electric drive method. Specifically, the support trolley is provided with a driving motor, energy storage equipment, an inversion module, a charging management system and a controller, wherein the charging management system, the controller and the energy storage equipment form a power supply loop, and the energy storage equipment, the inversion module and the driving motor form a discharging loop.
Because the working condition of rescue in support platform truck work under harsher operational environment or the operational environment that is used for long distance and high altitude, and when the railway broke down and need the rescue, the electric wire netting around the railway all is cut off, therefore energy storage equipment can't charge, in order to solve this problem, this implementation replaces traditional engine with driving motor, provides the electric energy for driving motor with energy storage equipment to external power source has been set up and has been charged for energy storage equipment. Preferably, the external power supply comprises a crane main vehicle power supply, a boom flatcar power supply, a power supply network, a portable charging device or a mobile charging device. When the external power supply is a crane main power supply, the electric energy of the crane main power supply is transmitted to the energy storage device through a cable, and the general crane main power supply outputs 380V alternating voltage; when the external power supply is the boom flatcar power supply, the electric energy of the boom flatcar power supply is transmitted to the energy storage device through the cable; when the external power supply is a power supply network, the electric energy of the power grid outside the rescue site needs to be transmitted to the energy storage device by a long cable; when the external power supply is the portable charging equipment or the mobile charging equipment, the energy storage equipment can be directly charged through the portable charging equipment or the mobile charging equipment.
And the energy storage device is used for receiving the charging current or voltage provided by the external power supply and providing electric energy for the driving motor after the charging device is fully charged. Preferably, the energy storage device comprises a storage battery pack and a super capacitor. The crane main car power supply, the crane jib flat car power supply, the power supply network, the portable charging equipment or the mobile charging equipment are respectively and electrically connected with the two ends of the super capacitor and the anode and the cathode of the storage battery through the charging management system, and respectively charge the storage battery and the super capacitor, and when the storage battery and the super capacitor are fully charged, the storage battery and the super capacitor respectively supply power to the driving motor through the inversion module.
And the charging management system monitors the electric quantity of the energy storage equipment in real time when the energy storage equipment is charged, and sends a detection result to the controller so as to prevent the phenomenon of overcharge and overdischarge. In this embodiment, the charging management system includes a 12-pulse rectifier, a digital phase-shift trigger circuit, a full-bridge power conversion circuit, and a discharging depolarization circuit.
And the 12-pulse rectifier converts the three-phase alternating current into direct current and transmits the direct current to the storage battery pack. Generally, a three-phase bridge rectifier circuit is adopted for rectification, but because 6n +/-1 harmonics exist in three-phase alternating current, the interference of 5 and 7 harmonics to a power grid becomes more and more serious along with the improvement of system output power, in order to inhibit the 6n +/-1 harmonics and improve a power factor, a 12-pulse rectifier is adopted in the embodiment, and the 12-pulse rectifier is formed by connecting two three-phase bridge rectifier circuits in series and comprises 12 thyristors, and the conduction time of the 12 thyristors is respectively different by 30 degrees, so that the 12-pulse rectifier outputs periodic sawtooth wave signals.
And the digital phase-shift trigger circuit is used for triggering the 12-pulse rectifier and regulating the output direct-current voltage of the 12-pulse rectifier by controlling the duty ratio of control pulses of the 12 thyristors. Because the 12-pulse rectifier is formed by connecting two three-phase bridge rectifier circuits in series, the triggering of the two three-phase bridge rectifier circuits is required to have a phase difference of 30 degrees, the two three-phase bridge rectifier circuits are triggered respectively and do not interfere with each other, each trigger circuit of each three-phase bridge rectifier circuit has six trigger signals, respective thyristors are conducted in sequence, and then the waveform and the magnitude of the output voltage of the three-phase bridge rectifier circuits are controlled by controlling the magnitude of the conduction angle. In order to meet the triggering requirement of the 12-pulse rectifier, in the embodiment, as shown in fig. 3, the digital phase shift triggering circuit is provided to include a voltage-controlled oscillator, a phase shifter, a counter and a pulse distribution circuit. The voltage-controlled oscillator adjusts the output pulse frequency of the voltage-controlled oscillator by controlling the magnitude of input voltage, and further controls the magnitude of the trigger angle of the three-phase bridge rectifier circuit; the phase shifter collects synchronous voltage signals of the secondary side of a transformer in the three-phase bridge rectifier circuit, because the primary side of the transformer leads the secondary side of the transformer by 30 degrees in phase, and the triggering of the three-phase bridge rectifier circuit needs to keep the triggering signals synchronous with the three-phase bridge rectifier circuit, the phase shifter is arranged in the embodiment to shift the voltage signals collected by the secondary side of the transformer back by 30 degrees so as to realize the synchronization purpose, the voltage signals after passing through the phase shifter are synchronous with the three-phase bridge rectifier circuit, namely the phase shifter finally outputs synchronous signals which are used as the triggering signals to be output to the counter; in this embodiment, the input end of the counter is electrically connected to the output end of the phase shifter and the output end of the voltage-controlled oscillator, respectively, and the output end of the counter is electrically connected to the input end of the pulse distribution circuit; the pulse distribution circuit performs pulse distribution according to different output pulses of the counter, outputs PWM waves with different duty ratios, and realizes sequential triggering of thyristors in the three-phase bridge rectifier circuit.
The full-bridge power conversion circuit converts direct current output by the 12-pulse rectifier into alternating current and then converts the alternating current into direct current to finish conversion of DC-AC-DC. In this embodiment, the input terminal of the full-bridge power conversion circuit is electrically connected to the output terminal of the 12-pulse rectifier, and the output terminal of the full-bridge power conversion circuit is electrically connected to the positive output terminal and the negative output terminal of the storage battery pack. Preferably, as shown in fig. 4, the dc signal output by the 12-pulse rectifier is first converted into high-frequency pulse ac through four thyristors, the high-frequency pulse ac is stepped down by a high-frequency transformer, and then rectified into dc voltage required for charging the battery pack through a rectifier diode; the output voltage of the full-bridge power conversion circuit is determined by the turn ratio of the high-frequency transformer and the conduction time of the four thyristors.
The utility model provides a storage battery pack, including storage battery pack, stand trolley, power type power, consequently, need satisfy the characteristics that fill soon and send out, when external power source charges to storage battery pack, because quick charge can produce polarization, influence storage battery pack's charge-discharge efficiency, reduce storage battery pack's capacity, shorten storage battery pack's life, consequently, in this embodiment, set up the depolarization circuit that discharges and eliminate polarization, the depolarization circuit that discharges connects in parallel between storage battery pack's positive output and negative output. Preferably, as shown in fig. 4, the discharge depolarization circuit includes: the circuit comprises an inductor L8, a capacitor C5, a diode D5, a resistor R7 and a triode Q17; specifically, one end of an inductor L8 is electrically connected to the positive electrode of the battery pack, the other end of the inductor L8 is electrically connected to the collector of the transistor Q17 and the negative electrode of the diode D5, the base of the transistor Q17 is electrically connected to the controller, a capacitor C5 is connected in parallel to two ends of the collector and the emitter of the transistor Q17, the emitter of the transistor Q17 and the positive electrode of the diode D5 are electrically connected to one end of a resistor R7, and the other end of the resistor R7 is electrically connected to the negative electrode of the battery pack. The controller controls the conduction of the triode Q17 to discharge the battery with specified current, and the negative pulse is adopted to discharge the storage battery in the final charging stage with serious polarization, so that the polarization phenomenon can be effectively eliminated; the capacitor C5, the diode D5 and the resistor R7 function to protect the transistor Q17.
And the inversion module inverts the output voltage of the storage battery pack and the super capacitor to change the output voltage into an electric signal capable of driving the driving motor. In this embodiment, the inverter module includes a first bidirectional DC/DC converter, a second bidirectional DC/DC converter, and a PWM converter.
The first bidirectional DC/DC converter has two functions, namely, when the storage battery pack charges the driving motor, the direct current output by the storage battery pack is subjected to boost conversion to be converted into the direct current with adjustable voltage; secondly, when the discharge capacity of the storage battery pack is more than the demand of the driving motor, the residual electric quantity is absorbed by the super capacitor through the first bidirectional DC/DC converter and the second bidirectional DC/DC converter, and the electric energy flow direction is shown by a dotted line in fig. 2. In this embodiment, the input terminal of the first bidirectional DC/DC converter is electrically connected to the positive output terminal and the negative output terminal of the battery pack, and the output terminal of the first bidirectional DC/DC converter is electrically connected to the input terminal of the PWM converter and the second bidirectional DC/DC converter, respectively.
The second bidirectional DC/DC converter has three functions, namely, when the super capacitor charges the driving motor, the direct current output by the super capacitor is subjected to boost conversion to be converted into the direct current with adjustable voltage; secondly, when the discharge capacity of the storage battery pack is more than the demand of the driving motor, the redundant electric quantity of the storage battery pack can be stored, and the electric energy flows to the dotted line in the figure 2; thirdly, when the driving motor decelerates or brakes, the generated braking energy is rectified by the PWM converter, and then input into the super capacitor after being subjected to buck conversion by the second bidirectional DC/DC converter, so that the electric quantity of the super capacitor is supplemented, the energy feedback is realized, and the electric energy flows to the direction shown by the dotted line in fig. 2. In this embodiment, the first bidirectional DC/DC converter and the second bidirectional DC/DC converter may be identical or different in structure, and are set to be identical here; meanwhile, the first bidirectional DC/DC converter and the second bidirectional DC/DC converter adopt a two-phase half-bridge DC/DC converter combined by Buck and Boost, and the two-phase half-bridge DC/DC converter is used as an interface between the storage battery pack and the driving motor to realize energy transfer and power flow on two sides, so that the storage battery can be flexibly charged and discharged.
And the input end of the PWM converter is electrically connected with the output ends of the first bidirectional DC/DC converter and the second bidirectional DC/DC converter respectively, and the output end of the PWM converter is electrically connected with the power supply end of the driving motor. In the embodiment, the PWM converter has two functions, that is, when the storage battery and the super capacitor charge the driving motor, the DC power output by the first bidirectional DC/DC converter and the second bidirectional DC/DC converter is rectified; secondly, when the driving motor decelerates or brakes, the braking energy generated by the driving motor is rectified, and alternating current components in the braking energy are filtered, so that the braking energy can enter the super capacitor through the second bidirectional DC/DC converter.
The driving motor is controlled in a pure electric mode, the driving motor is assembled and connected with a gear shaft of a driving wheel shaft on the supporting trolley, and the storage battery pack is electrically connected with a power supply end of the driving motor through the inversion module. In this embodiment, the driving motor may be an existing product, and a description thereof will not be repeated.
The working principle of the embodiment is as follows: before the support trolley enters a working environment, the storage battery pack and the super capacitor are charged through an external power supply, the external power supply is converted into direct current through a 12-pulse rectifier, the direct current is converted into alternating current through a full-bridge power conversion circuit, the alternating current is converted into direct current, the direct current charges the storage battery pack and the super capacitor, a discharge depolarization circuit is adopted to eliminate polarization in the final charging stage with serious polarization, and a charging loop is cut off after the storage battery pack and the super capacitor are fully charged; the storage battery pack and the super capacitor output power supply current, the power supply current of the storage battery pack is output to the driving motor after being subjected to boost conversion by the first bidirectional DC/DC converter and rectified by the PWM converter, the power supply current of the super capacitor is output to the driving motor after being subjected to boost conversion by the second bidirectional DC/DC converter and rectified by the PWM converter, and the driving motor drives the support trolley to move.
The beneficial effect of this embodiment does: the traditional engine is replaced by the driving motor, the storage battery pack and the super capacitor are arranged on the supporting trolley, the storage battery pack and the super capacitor are fully charged by a main vehicle power supply, a suspension arm flatcar power supply, a power supply network, portable charging equipment or mobile charging equipment of the crane before entering a rescue site, and the storage battery pack and the super capacitor provide electric energy for the driving motor, so that the situations that the traditional generator cannot work, the supporting trolley does not have power supply and cannot perform rescue work due to severe working environment in a railway rescue site can be avoided;
by arranging the first bidirectional DC/DC converter and the second bidirectional DC/DC converter, when the discharge amount of the storage battery pack is more than the demand amount of the driving motor, the residual amount of electricity is absorbed by the super capacitor through the first bidirectional DC/DC converter and the second bidirectional DC/DC converter; when the driving motor decelerates or brakes, the generated braking energy is rectified by the PWM converter, is subjected to buck conversion by the second bidirectional DC/DC converter and then is input into the super capacitor, so that the electric quantity of the super capacitor is supplemented, and energy feedback is realized;
by arranging the 12-pulse rectifier, 6n +/-1 times of harmonic waves in a power grid can be suppressed, and the power factor is improved;
the digital phase-shifting trigger circuit can meet the trigger requirement of the 12-pulse rectifier.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. High-speed railway crane supports pure electric drive system of platform truck, it includes support platform truck and external power source, its characterized in that: the supporting trolley is provided with a driving motor, energy storage equipment, an inversion module, a charging management system and a controller;
the external power supply comprises a crane main vehicle power supply, a suspension arm flat vehicle power supply, a power supply network, portable charging equipment or movable charging equipment;
the crane main vehicle power supply, the suspension arm flat vehicle power supply, the power supply network, the portable charging equipment or the mobile charging equipment charge the energy storage equipment through the charging management system, and the charging management system monitors the electric quantity of the energy storage equipment in real time and sends a detection result to the controller; the energy storage device is electrically connected with the input end of the inversion module, the inversion module inverts the direct-current voltage output by the energy storage device into alternating current, the output end of the inversion module is electrically connected with the power supply end of the driving motor, and the driving motor is assembled and connected with a gear shaft of a driving wheel shaft on the support trolley; when the engine does not operate, the energy storage device provides electric energy for the driving motor through the inversion module so as to drive the supporting trolley to run.
2. The pure electric drive system of the high-speed railway crane supporting trolley according to claim 1, characterized in that: the energy storage device comprises a storage battery pack and a super capacitor;
the crane main power supply, the suspension arm flat car power supply, the power supply network, the portable charging equipment or the mobile charging equipment are respectively and electrically connected with the two ends of the super capacitor and the positive electrode and the negative electrode of the storage battery through the charging management system, and respectively charge the storage battery and the super capacitor, and when the storage battery and the super capacitor are fully charged, the storage battery and the super capacitor respectively supply power to the driving motor through the inversion module.
3. The pure electric drive system of the high-speed railway crane supporting trolley according to claim 1, characterized in that: the inversion module comprises a first bidirectional DC/DC converter, a second bidirectional DC/DC converter and a PWM converter;
the first bidirectional DC/DC converter performs boost conversion on the direct current output by the storage battery pack to convert the direct current into direct current with adjustable voltage;
the second bidirectional DC/DC converter performs boost conversion on the direct current output by the super capacitor to convert the direct current into direct current with adjustable voltage;
the PWM converter rectifies direct currents output by the first bidirectional DC/DC converter and the second bidirectional DC/DC converter, and rectified electric signals are input to a power supply end of the driving motor;
the positive output end and the negative output end of the storage battery pack are electrically connected with the input end of the PWM converter through the first bidirectional DC/DC converter respectively, the super capacitor is electrically connected with the input end of the PWM converter and the output end of the first bidirectional DC/DC converter through the second bidirectional DC/DC converter respectively, and the output end of the PWM converter is electrically connected with the power supply end of the driving motor.
4. The pure electric drive system of the high-speed railway crane supporting trolley as claimed in claim 2, characterized in that: the charging management system comprises a 12-pulse rectifier, a digital phase-shifting trigger circuit and a full-bridge power conversion circuit;
the 12-pulse rectifier converts three-phase alternating current provided by an external power supply into direct current and transmits the direct current to the storage battery pack and the super capacitor;
the digital phase-shift trigger circuit regulates the output direct-current voltage of the 12-pulse rectifier;
the full-bridge power conversion circuit converts direct current output by the 12-pulse rectifier into alternating current and then converts the alternating current into direct current to complete conversion of DC-AC-DC;
the input end of the digital phase-shift trigger circuit is electrically connected with the controller, the output end of the digital phase-shift trigger circuit is electrically connected with the control end of the 12-pulse rectifier, the external power supply is electrically connected with the input end of the full-bridge power conversion circuit through the 12-pulse rectifier, and the output end of the full-bridge power conversion circuit is electrically connected with the two ends of the super capacitor and the positive output end and the negative output end of the storage battery pack.
5. The pure electric drive system of the high-speed railway crane supporting trolley according to claim 3, characterized in that: the charge management system further includes a discharge depolarization circuit;
the discharge depolarization circuit is connected in parallel between the positive output end and the negative output end of the storage battery pack.
6. The pure electric drive system of the high-speed railway crane supporting trolley as claimed in claim 5, characterized in that: the discharge depolarization circuit includes: the circuit comprises an inductor L8, a capacitor C5, a diode D5, a resistor R7 and a triode Q17;
one end of the inductor L8 is electrically connected with the anode of the storage battery pack, the other end of the inductor L8 is electrically connected with the collector of the triode Q17 and the cathode of the diode D5 respectively, the base of the triode is electrically connected with the controller, the capacitor C5 is connected in parallel with the two ends of the collector and the emitter of the triode Q17, the emitter of the triode Q17 and the anode of the diode D5 are electrically connected with one end of the resistor R7 respectively, and the other end of the resistor R7 is electrically connected with the cathode of the storage battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023043622.2U CN214141272U (en) | 2020-12-16 | 2020-12-16 | Pure electric driving system of high-speed railway crane supporting trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023043622.2U CN214141272U (en) | 2020-12-16 | 2020-12-16 | Pure electric driving system of high-speed railway crane supporting trolley |
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| CN214141272U true CN214141272U (en) | 2021-09-07 |
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| CN202023043622.2U Active CN214141272U (en) | 2020-12-16 | 2020-12-16 | Pure electric driving system of high-speed railway crane supporting trolley |
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