CN213661265U - Power supply device for bridge maintenance vehicle control system - Google Patents

Power supply device for bridge maintenance vehicle control system Download PDF

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Publication number
CN213661265U
CN213661265U CN202022427759.1U CN202022427759U CN213661265U CN 213661265 U CN213661265 U CN 213661265U CN 202022427759 U CN202022427759 U CN 202022427759U CN 213661265 U CN213661265 U CN 213661265U
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power supply
output end
relay
direct current
igbt tube
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CN202022427759.1U
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吴家亮
冯涛
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Chongqing Jiajing Electronic Equipment Co ltd
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Chongqing Jiajing Electronic Equipment Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model provides a power supply unit for bridge tool car control system, the device includes: the power supply comprises a main power supply module, a standby power supply module and a power supply selector; the main power supply module comprises a charger, a lithium battery pack, a direct current transformer and a direct current-alternating current converter, and the charger is used for enabling the standby power supply module to charge the lithium battery pack; the direct current transformer is used for reducing the first direct current output by the lithium battery pack into second direct current; the direct current-alternating current converter is used for converting the second direct current output by the direct current transformer into first alternating current and is also used for outputting the first alternating current to the power supply selector; the standby power supply module comprises a standby power supply and a standby power supply interface, and the standby power supply is used for outputting second alternating current to the power supply selector; the power supply selector is used for enabling the first alternating current or the second alternating current to supply power for the rear-stage load. The utility model discloses a bridge tool car control system provides stable, reliable electric energy, has prevented the emergence of incident.

Description

Power supply device for bridge maintenance vehicle control system
Technical Field
The utility model relates to a mains operated technical field especially relates to a power supply unit for bridge tool car control system.
Background
With the increase of the number of expressways, railways, highway bridges, railway bridges and urban viaducts, the detection and maintenance operation of bridges is increasingly heavy, the traditional maintenance means cannot meet the requirement of diversified bridge maintenance and inspection, and the market demand for special bridge maintenance vehicles is increased year by year.
The control system of the bridge maintenance vehicle is used as a core component of the bridge maintenance vehicle, wherein the power supply device is also used as the core component of the control system; the power supply of the existing control system mainly adopts a trolley line power supply and a generator power supply, and the trolley line power supply has the defects of low protection level, poor contact and spark generation caused by easy corrosion in a bridge environment, poor reliability, serious safety risk and basic elimination; the power supply of the generator has the defects of high noise, influence on the alternating current and operation of workers, easy leakage of fuel oil and engine oil, environmental pollution and the like.
Therefore, the power supply of the bridge maintenance vehicle control system in the prior art has the problems of poor reliability and high noise and also has safety risk.
SUMMERY OF THE UTILITY MODEL
To exist not enough among the prior art, the utility model provides a pair of a power supply unit for bridge inspection vehicle control system, it has solved among the prior art bridge inspection vehicle control system's power and has had the problem that the reliability is poor and the noise is big.
On the one hand, the embodiment of the utility model provides a power supply unit for bridge tool car control system, the device includes: the power supply comprises a main power supply module, a standby power supply module and a power supply selector; the main power supply module comprises a charger, a lithium battery pack, a direct current transformer and a direct current-alternating current converter, wherein the input end of the charger is connected with the first output end of the standby power supply module, and the output end of the charger is connected with the input end of the lithium battery pack and used for charging the lithium battery pack by the standby power supply module through the charger; the input end of the direct current transformer is connected with the first output end of the lithium battery pack and used for reducing the first direct current output by the lithium battery pack into second direct current; the input end of the dc-ac converter is connected to the first output end of the dc transformer, and the output end of the dc-ac converter is connected to the first input end of the power selector, so as to convert the second dc power output by the dc transformer into the first ac power and output the first ac power to the power selector; the standby power supply module comprises a standby power supply and a standby power supply interface, wherein a first output end of the standby power supply is connected with an input end of the charger, and a second output end of the standby power supply is connected with a second input end of the power supply selector through the standby power supply interface and used for outputting second alternating current to the power supply selector; and the output end of the power supply selector is connected with a rear-stage load when in use and is used for enabling the first alternating current or the second alternating current to supply power for the rear-stage load.
Optionally, the power supply selector comprises: relays and knife switches; the output end of the DC-AC converter is connected with a normally open contact of the relay, the output end of the standby power supply interface is connected with a normally closed contact of the relay, and the output end of the relay is connected with the rear-stage load; the zero line output end of the direct current-alternating current converter is connected with the first end of the coil of the relay, the live wire output end of the direct current-alternating current converter is connected with the first end of the knife switch, and the second end of the knife switch is connected with the second end of the coil of the relay.
Optionally, when the relay is a double-contact electromagnetic relay, a first normally open contact of the relay is connected to a live wire output end of the dc-ac converter, a first normally closed contact of the relay is connected to a live wire output end of the standby power supply interface, and a first movable contact of the relay is connected to a live wire input end of the rear-stage load; and a second normally open contact of the relay is connected with the zero line output end of the DC-AC converter, a second normally closed contact of the relay is connected with the zero line output end of the standby power supply interface, and a second movable contact of the relay is connected with the zero line input end of the rear-stage load.
Optionally, the second output end of the lithium battery pack is connected to a first rear-stage load when in use, and is configured to provide high-voltage direct current for the first rear-stage load; the second output end of the direct current transformer is connected with a second rear-stage load when in use and is used for providing low-voltage direct current for the second rear-stage load; and the output end of the DC-AC converter is connected with a third rear-stage load and used for providing AC power for the third rear-stage load.
Optionally, the main power supply module further comprises: and the input end of the electric quantity metering module is respectively connected with the second output end of the lithium battery pack, the second output end of the direct current transformer and the output end of the direct current-alternating current converter and is used for acquiring the output electric quantity values of the second output end of the lithium battery pack, the second output end of the direct current transformer and the output end of the direct current-alternating current converter.
Optionally, the main power supply module further comprises: and the input end of the voltage detection module is connected with the output end of the lithium battery pack and used for detecting the output voltage value of the lithium battery pack.
Optionally, the main power supply module further comprises: and the battery manager is respectively connected with the charger, the lithium battery pack, the output end of the electric quantity metering module and the output end of the voltage detection module and is used for managing and protecting the charging and discharging of the lithium battery pack.
Optionally, the main power supply module further comprises: and the display module is connected with the battery manager and is used for displaying the parameters output by the battery manager in real time.
Optionally, the backup power source comprises a generator or a solar panel.
Optionally, the dc-ac converter comprises: an inverter and an inverter trigger circuit; the inverter comprises a first IGBT tube, a second IGBT tube, a third IGBT tube and a fourth IGBT tube; the drain electrode of the first IGBT tube and the drain electrode of the second IGBT tube are connected with the positive output end of the direct-current transformer, the source electrode of the third IGBT tube and the source electrode of the fourth IGBT tube are connected with the negative output end of the direct-current transformer, the grid electrode of the first IGBT tube and the grid electrode of the fourth IGBT tube are connected with the first output end of the inversion trigger circuit, and the grid electrode of the second IGBT tube and the grid electrode of the third IGBT tube are connected with the second output end of the inversion trigger circuit; the source electrode of the first IGBT tube is connected with the drain electrode of the third IGBT tube to form a first output end of the direct current-alternating current converter, and the source electrode of the second IGBT tube is connected with the drain electrode of the fourth IGBT tube to form a second output end of the direct current-alternating current converter; the inversion trigger circuit is used for outputting corresponding trigger signals to the inverter and controlling the inverter to output alternating current with corresponding frequency.
On the other hand, the utility model discloses another embodiment still provides a power supply unit for bridge tool car control system, the device includes: the battery pack comprises a charger, a battery manager and a lithium battery pack; the charger is connected with the battery manager and is used for providing charging electric energy for the lithium battery pack; the battery manager is connected with the lithium battery pack and is used for managing and protecting the charging and discharging of the lithium battery pack; the lithium battery pack is connected with a rear-stage load and is used for providing direct current for the rear-stage load.
Optionally, the power supply device further includes: and the input end of the electric quantity metering module is connected with the lithium battery pack and used for acquiring the storage electric quantity value of the lithium battery pack.
Optionally, the power supply device further includes: and the input end of the voltage detection module is connected with the output end of the lithium battery pack and used for detecting the output voltage value of the lithium battery pack.
Optionally, the power supply device further includes: and the display module is connected with the battery manager and is used for displaying the parameters output by the battery manager in real time.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a power selector supplies power for the back level load after carrying out the automatic selection to main power module and stand-by power module, when main power module has the electricity, the power selector selects the main power module for the power supply of back level load, when main power module does not have the electricity, the power selector selects the stand-by power module for the power supply of back level load, has guaranteed the reliability of electrical power generating system, prevents that the condition that appears cutting off the power supply from influencing the operation of bridge tool car; the utility model has the advantages that the power supply device is safer and more reliable and is convenient to move through the main power supply module consisting of the charger, the lithium battery pack, the direct current transformer and the direct current-alternating current converter; this implementation does with novel through stand-by power supply module the lithium cell group of main power supply module charges, makes the lithium cell group under the circumstances that does not have the electricity, can guarantee bridge tool car control system's normal operating, can also make stand-by power supply module do lithium cell group in time charges, makes main power supply module can quick charge and provide the electric energy for the back level load, consequently the utility model discloses a power supply unit not only does bridge tool car control system provides stable, reliable electric energy, still can not influence staff's interchange and operation because of the noise, has prevented the emergence of incident.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a power supply device for a bridge maintenance vehicle control system according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power selector according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a main power module according to an embodiment of the present invention;
fig. 4 is a view illustrating an application scenario of a power supply device for a control system of a bridge maintenance vehicle according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another power supply device for a bridge maintenance vehicle control system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The functional units of the same reference numerals in the examples of the present invention have the same and similar structures and functions.
Fig. 1 is shown as the embodiment of the utility model provides a power supply unit's for bridge inspection vehicle control system structural schematic diagram, as shown in fig. 1, the power supply unit 100 for bridge inspection vehicle control system that this embodiment provided specifically includes:
a main power supply module 110, a standby power supply module 120, and a power supply selector 130;
the main power module 110 includes a charger 111, a lithium battery pack 112, a dc transformer 113 and a dc-ac converter 114, wherein an input terminal of the charger 111 is connected to a first output terminal of the standby power module 120, and an output terminal of the charger 111 is connected to an input terminal of the lithium battery pack 112, so that the standby power module 120 charges the lithium battery pack 112 through the charger 111; the input end of the dc transformer 113 is connected to the first output end of the lithium battery pack 112, and is configured to step down the first dc output by the lithium battery pack 112 to a second dc; an input end of the dc-ac converter 114 is connected to a first output end of the dc transformer 113, an output end of the dc-ac converter 114 is connected to a first input end of the power selector 130, and is configured to convert the second dc power output by the dc transformer into a first ac power and output the first ac power to the power selector 130;
the backup power module 120 includes a backup power source 121 and a backup power source interface 122, a first output terminal of the backup power source 121 is connected to the input terminal of the charger 111, and a second output terminal of the backup power source 121 is connected to a second input terminal of the power source selector 130 through the backup power source interface 122, for outputting a second ac power to the power source selector 130;
the output of the power selector 130 is connected to a subsequent load 200 for supplying the subsequent load 200 with the first ac power or the second ac power.
It should be noted that, the utility model discloses a power selector 130 supplies power for back-stage load 200 after carrying out the automatic selection to main power module 110 and stand-by power module 120, when main power module 110 has the electricity, power selector 130 selects main power module 110 to supply power for back-stage load 200, when main power module 110 does not have the electricity, power selector 130 selects stand-by power module 120 to supply power for back-stage load 200, has guaranteed the reliability of power supply system, prevents that the condition of appearing cutting off the power supply from influencing the operation of bridge maintenance car; the utility model makes the power supply device safer, more reliable and more convenient to move through the main power supply module 110 which consists of the charger 111, the lithium battery pack 112, the direct current transformer 113 and the direct current-alternating current converter 114; this implementation is with novel do through stand-by power supply module 120 the lithium cell group 112 of main power module 110 charges, makes lithium cell group 112 under the circumstances that does not have the electricity, can guarantee bridge tool car control system's normal operating, can also make stand-by power supply module 120 do lithium cell group 112 in time charges, makes main power module 110 can quick charge and for back level load 200 provides the electric energy, consequently the utility model discloses a power supply unit not only does bridge tool car control system provides stable, reliable electric energy, still can not appear noise influence staff's interchange and operation, has prevented the emergence of incident.
Fig. 2 is a schematic circuit diagram of a power supply selector according to an embodiment of the present invention, and as shown in fig. 2, the power supply selector 130 provided in this embodiment includes:
a relay 131 and a knife switch 132; the output end of the main power supply 110 is connected with the normally open contact of the relay 131, the output end of the standby power supply module 120 is connected with the normally closed contact of the relay 131, and the output end of the relay 131 is connected with the rear-stage load 200; the zero line output end of the main power supply 110 is connected with the first end of the coil of the relay 131, the live line output end of the main power supply 110 is connected with the first end of the knife switch 132, and the second end of the knife switch 132 is connected with the second end of the coil of the relay 131.
It should be noted that, in this embodiment, the output end of the main power module 110 is the output end of the dc-ac converter 114, and the output end of the standby power module 120 is the output end of the standby power interface 122; when the relay 131 has only one set of contacts, the zero line of the main power module 110, the zero line of the standby power module 120 and the zero line of the rear-stage load 200 are connected together, the normally open contact of the relay 131 is connected with the live wire output end L of the main power module 110, and the normally closed contact of the relay 131 is connected with the live wire output end L of the standby power module 120.
In another embodiment of the present invention, as shown in fig. 2, when the relay 131 is a double-contact electromagnetic relay, the first normally open contact 2 of the relay 131 is connected to the live wire output terminal L of the main power module 110, the first normally closed contact 3 of the relay 131 is connected to the live wire output terminal L of the standby power module 120, and the first movable contact 1 of the relay 131 is connected to the live wire input terminal L of the rear-stage load 200; the second normally open contact 5 of the relay 131 is connected to the zero line output end N of the main power module 110, the second normally closed contact 6 of the relay 131 is connected to the zero line output end N of the standby power module 120, and the second movable contact 4 of the relay 131 is connected to the zero line input end N of the rear-stage load 200. It should be noted that, the two sets of contacts of the relay 131 act synchronously, so that the main power module loop and the standby power module loop can be separated, and the two loops do not interfere with each other, and are safer and more reliable.
The working process of the power selector 130 in this embodiment is as follows: when the knife switch 132 is turned on, the main power module 110 is connected to two coil terminals of the relay 131, so that the power selector 130 selects the main power module 110, that is, when the main power module 110 is powered, the coil of the relay 131 has a point, the first normally open contact 2 is closed, and the first normally closed contact 3 is opened, so that the output voltage of the main power module 110 supplies power to the rear-stage load 200; when the main power module 110 cannot supply power, the coil end of the relay 131 is not powered, the first normally open contact 2 is opened, and the first normally closed contact 3 is closed, so that the power selector 130 selects the standby power module 120 to provide power for the rear-stage load 200, the power selector 130 automatically selects a power supply, and the rear-stage load 200 is ensured to be continuously supplied with power without power failure.
When the main power module 110 is powered on, the switch 132 is opened, the coil of the relay 131 loses power, the first normally open contact 2 is opened, and the first normally closed contact 3 is closed, so that the main power module 110 is switched to the standby power module 120 to supply power to the rear-stage load 200; when the knife switch 132 is turned on again, the coil of the relay 131 is electrified, the first normally open contact 2 is closed, the first normally closed contact 3 is opened, and the standby power module 120 is switched to the main power module 110 to supply power to the rear-stage load 200, so that the main power module 110 and the standby power module 120 are freely switched through manual intervention, and the application is wider and more flexible.
Fig. 3 is a schematic structural diagram of a main power module according to an embodiment of the present invention, as shown in fig. 3, when the second output terminal of the lithium battery pack 112 in this embodiment is used, the second output terminal is connected to a first rear-stage load 210, and is used for providing a high-voltage direct current for the first rear-stage load 210; the second output end of the dc transformer 113 is connected to a second rear-stage load 220 when in use, and is configured to provide low-voltage dc power for the second rear-stage load 220; the output terminal of the dc-ac converter 114 is connected to a third subsequent load 230 for providing ac power to the third subsequent load 230.
In an embodiment of the present invention, the main power module 110 further includes:
an electric quantity metering module 115, an input end of the electric quantity metering module 115 is respectively connected to the second output end of the lithium battery pack 112, the second output end of the dc transformer 113, and the output end of the dc-ac converter 114, and is configured to obtain output electric quantity values of the second output end of the lithium battery pack 112, the second output end of the dc transformer 113, and the output end of the dc-ac converter 114;
the input end of the voltage detection module 116 is connected to the output end of the lithium battery pack 112, and is configured to detect an output voltage value of the lithium battery pack 112;
and the battery manager 117 is connected with the charger 111, the lithium battery pack 112, the output end of the electric quantity metering module 115 and the output end of the voltage detection module 116 respectively, and is used for managing and protecting the charging and discharging of the lithium battery pack 112.
And the display module 118, the display module 118 is connected to the battery manager 117, and is configured to display the parameters output by the battery manager 117 in real time, and may display the voltage value, the current value, and the point two of the lithium battery pack 112 to prompt a user to pay attention to charging in time.
In another embodiment of the present invention, the backup power source 121 includes a generator or a solar panel.
Fig. 4 is a view showing an application scenario of a power supply device for a bridge maintenance vehicle control system according to an embodiment of the present invention, as shown in fig. 4, the power supply device is applied to an electrical control system of a bridge maintenance vehicle, the main power supply module of this embodiment includes a charger, a BMS, a lithium battery pack, a DC-DC module and a DC-AC module, first the lithium battery pack can provide a DC voltage of 260V-365V, and can directly provide the DC voltage for a motor frequency converter of the bridge maintenance vehicle through a contactor, and there is no need to convert the DC voltage into AC through three inverters and provide the AC to the frequency converter, so that not only are the number of failure points of the main power supply module reduced, but also the material, installation and maintenance costs are saved, and the movable capacity and load of the bridge maintenance vehicle are increased; secondly, the high-voltage direct current output by the lithium battery pack is subjected to voltage reduction through the DC-DC module to obtain 24V low-voltage direct current, the low-voltage direct current is subjected to inversion through the DC-AC module to obtain 220V alternating current, the 220V alternating current is input into the power supply selector, the alternating current can be provided for a PLC (programmable logic controller) connected to the power supply selector, the alternating current can also be provided for the frequency converter, and the frequency converter can work in various power supply modes.
Further, the standby power supply module in this embodiment includes generator, phase sequence protection and circuit breaker, the alternating current of generator output can be for lithium cell group in the main power module charges, can also provide the alternating current for the PLC controller behind phase sequence protection, circuit breaker and the power selector.
Therefore, under the condition that the lithium battery pack is electrified, the power supply selector selects the main power supply module to provide electric energy for the frequency converter and the PLC, and under the condition that the lithium battery pack is not electrified, the power supply selector provides electric energy for the frequency converter and the PLC by the generator, so that the normal work of an electric control system of the bridge maintenance car can be ensured, and the problem that the project progress is influenced due to power failure can be avoided.
In another embodiment of the present invention, the dc-ac converter includes: an inverter and an inverter trigger circuit; the inverter comprises a first IGBT tube, a second IGBT tube, a third IGBT tube and a fourth IGBT tube; the drain electrode of the first IGBT tube and the drain electrode of the second IGBT tube are connected with the positive output end of the direct-current transformer, the source electrode of the third IGBT tube and the source electrode of the fourth IGBT tube are connected with the negative output end of the direct-current transformer, the grid electrode of the first IGBT tube and the grid electrode of the fourth IGBT tube are connected with the first output end of the inversion trigger circuit, and the grid electrode of the second IGBT tube and the grid electrode of the third IGBT tube are connected with the second output end of the inversion trigger circuit; the source electrode of the first IGBT tube is connected with the drain electrode of the third IGBT tube to form a first output end of the direct current-alternating current converter, and the source electrode of the second IGBT tube is connected with the drain electrode of the fourth IGBT tube to form a second output end of the direct current-alternating current converter; the inversion trigger circuit is used for outputting corresponding trigger signals to the inverter and controlling the inverter to output alternating current with corresponding frequency.
Fig. 5 is a schematic structural diagram of a power supply device for a bridge maintenance vehicle control system according to another embodiment of the present invention, as shown in fig. 5, the power supply device for a bridge maintenance vehicle control system provided in this embodiment specifically includes:
a charger 510, a battery manager 520, and a lithium battery pack 530;
the charger 510 is connected to the battery manager 520, and is used for providing charging power for the lithium battery pack 530;
the battery manager 520 is connected with the lithium battery pack 530 and is used for managing and protecting charging and discharging of the lithium battery pack 530;
the lithium battery pack 530 is connected to a rear stage load 540 for supplying dc power to the rear stage load 540.
In this embodiment, the power supply device further includes:
and the input end of the electric quantity metering module is connected with the lithium battery pack and used for acquiring the storage electric quantity value of the lithium battery pack.
In this embodiment, the power supply device further includes:
and the input end of the voltage detection module is connected with the output end of the lithium battery pack and used for detecting the output voltage value of the lithium battery pack.
In this embodiment, the power supply device further includes:
and the display module is connected with the battery manager and is used for displaying the parameters output by the battery manager in real time.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A power supply unit for a bridge inspection vehicle control system, the power supply unit comprising:
the power supply comprises a main power supply module, a standby power supply module and a power supply selector;
the main power supply module comprises a charger, a lithium battery pack, a direct current transformer and a direct current-alternating current converter, wherein the input end of the charger is connected with the first output end of the standby power supply module, and the output end of the charger is connected with the input end of the lithium battery pack and used for charging the lithium battery pack by the standby power supply module; the input end of the direct current transformer is connected with the first output end of the lithium battery pack and used for reducing the first direct current output by the lithium battery pack into second direct current; the input end of the dc-ac converter is connected to the first output end of the dc transformer, and the output end of the dc-ac converter is connected to the first input end of the power selector, so as to convert the second dc power output by the dc transformer into the first ac power and output the first ac power to the power selector;
the standby power supply module comprises a standby power supply and a standby power supply interface, wherein a first output end of the standby power supply is connected with an input end of the charger, and a second output end of the standby power supply is connected with a second input end of the power supply selector through the standby power supply interface and used for outputting second alternating current to the power supply selector;
and the output end of the power supply selector is connected with a rear-stage load when in use and is used for enabling the first alternating current or the second alternating current to supply power for the rear-stage load.
2. The power supply apparatus for a bridge inspection vehicle control system of claim 1, wherein the power supply selector comprises:
relays and knife switches;
the output end of the DC-AC converter is connected with a normally open contact of the relay, the output end of the standby power supply interface is connected with a normally closed contact of the relay, and the output end of the relay is connected with the rear-stage load;
the zero line output end of the direct current-alternating current converter is connected with the first end of the coil of the relay, the live wire output end of the direct current-alternating current converter is connected with the first end of the knife switch, and the second end of the knife switch is connected with the second end of the coil of the relay.
3. The power supply unit for a bridge inspection vehicle control system of claim 2, wherein when the relay is a double-contact electromagnetic relay, the first normally open contact of the relay is connected to the live wire output terminal of the dc-ac converter, the first normally closed contact of the relay is connected to the live wire output terminal of the backup power interface, and the first movable contact of the relay is connected to the live wire input terminal of the rear load;
and a second normally open contact of the relay is connected with the zero line output end of the DC-AC converter, a second normally closed contact of the relay is connected with the zero line output end of the standby power supply interface, and a second movable contact of the relay is connected with the zero line input end of the rear-stage load.
4. The power supply apparatus for a bridge inspection vehicle control system of claim 1, wherein the second output terminal of the lithium battery pack is operatively connected to a first rear stage load for providing high voltage dc power to the first rear stage load;
the second output end of the direct current transformer is connected with a second rear-stage load when in use and is used for providing low-voltage direct current for the second rear-stage load;
and the output end of the DC-AC converter is connected with a third rear-stage load and used for providing AC power for the third rear-stage load.
5. The power supply apparatus for a bridge inspection vehicle control system according to any one of claims 1 to 4, wherein the DC-AC converter comprises:
an inverter and an inverter trigger circuit;
the inverter comprises a first IGBT tube, a second IGBT tube, a third IGBT tube and a fourth IGBT tube;
the drain electrode of the first IGBT tube and the drain electrode of the second IGBT tube are connected with the positive output end of the direct-current transformer, the source electrode of the third IGBT tube and the source electrode of the fourth IGBT tube are connected with the negative output end of the direct-current transformer, the grid electrode of the first IGBT tube and the grid electrode of the fourth IGBT tube are connected with the first output end of the inversion trigger circuit, and the grid electrode of the second IGBT tube and the grid electrode of the third IGBT tube are connected with the second output end of the inversion trigger circuit; the source electrode of the first IGBT tube is connected with the drain electrode of the third IGBT tube to form a first output end of the direct current-alternating current converter, and the source electrode of the second IGBT tube is connected with the drain electrode of the fourth IGBT tube to form a second output end of the direct current-alternating current converter;
the inversion trigger circuit is used for outputting corresponding trigger signals to the inverter and controlling the inverter to output alternating current with corresponding frequency.
CN202022427759.1U 2020-10-27 2020-10-27 Power supply device for bridge maintenance vehicle control system Active CN213661265U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022427759.1U CN213661265U (en) 2020-10-27 2020-10-27 Power supply device for bridge maintenance vehicle control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022427759.1U CN213661265U (en) 2020-10-27 2020-10-27 Power supply device for bridge maintenance vehicle control system

Publications (1)

Publication Number Publication Date
CN213661265U true CN213661265U (en) 2021-07-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022427759.1U Active CN213661265U (en) 2020-10-27 2020-10-27 Power supply device for bridge maintenance vehicle control system

Country Status (1)

Country Link
CN (1) CN213661265U (en)

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