CN112636301B - Upper-mounted plug-in electric operating system and engineering machinery - Google Patents
Upper-mounted plug-in electric operating system and engineering machinery Download PDFInfo
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- CN112636301B CN112636301B CN202011314796.XA CN202011314796A CN112636301B CN 112636301 B CN112636301 B CN 112636301B CN 202011314796 A CN202011314796 A CN 202011314796A CN 112636301 B CN112636301 B CN 112636301B
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- 238000009413 insulation Methods 0.000 claims abstract description 58
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention provides a top-mounted plug-in operation system and engineering machinery, and belongs to the field of engineering machinery. The operating system includes: the device comprises an insulation detection device, a controller unit, a direct current bus, a contactor unit, an alternating current charger and a high-voltage distribution box; the main power output end of the contactor unit is connected with the power input end of the alternating current charger, the direct current bus is connected with the power output end of the alternating current charger, and the direct current bus supplies power to a load through the high-voltage distribution box; the insulation detection device is used for acquiring the ground insulation value of the direct current bus; the controller unit is used for correspondingly controlling the main power on-off of the contactor unit and/or the output power of the load and/or the on-off of the power supply of the high-voltage distribution box to the load according to the received ground insulation value of the direct-current bus. The invention can disconnect all high-voltage power supplies when the insulation is abnormal, thereby ensuring the high-voltage safety of the engineering machinery.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to an upper-mounted plug-in electric operating system and engineering machinery.
Background
Engineering machinery (such as a crane, a pump truck and an excavator) works in a field construction site or a building site for most of time due to the working characteristics of the engineering machinery, and the engineering machinery needs to work uninterruptedly for a long time due to the construction period and the like for most of time; the capacity of a high-voltage battery of the engineering machinery is limited, and the engineering machinery cannot support long-time uninterrupted operation. In the prior art, a stable alternating current power supply is available in most construction sites or construction sites, the engineering machinery works in a power-on operation state in most time, and a plurality of high-voltage power supplies exist in the top-loading operation, so that high-voltage safety is very important in the top-loading operation.
In the prior art, a loading operation safety strategy mainly aims at loading low-voltage safety operation, and no relevant high-voltage protection measures exist during external power supply operation; therefore, there is a risk of electric shock during the power-on operation.
Disclosure of Invention
The invention aims to provide a top-mounted plug-in electric operating system and engineering machinery, and at least solves the high-voltage protection problem of the engineering machinery.
In order to achieve the above object, a first aspect of the present invention provides a plug-in electrical operating system, including: the system comprises an insulation detection device, a controller unit, a direct current bus, a contactor unit, an alternating current charger and a high-voltage distribution box;
the main power output end of the contactor unit is connected with the power input end of the alternating current charger, the direct current bus is connected with the power output end of the alternating current charger, and the direct current bus supplies power to a load through the high-voltage distribution box;
the insulation detection device is used for acquiring the ground insulation value of the direct current bus;
the controller unit is used for correspondingly controlling the on-off of the main power of the contactor unit and/or the output power of the load and/or the on-off of the power supplied to the load by the high-voltage distribution box according to the received ground insulation value of the direct-current bus.
Optionally, the controller unit is further configured to output a first power-off signal for controlling the high-voltage distribution box to supply power to the load to be disconnected and output a second power-off signal for controlling the main power of the contactor to be disconnected when it is determined that the ground insulation value of the dc bus is smaller than a first preset value.
Optionally, the load includes a lifting device, and the controller unit is further configured to output a low-power operation signal for controlling the lifting device to reduce output power when it is determined that the ground insulation value of the dc bus is greater than or equal to a second preset value and smaller than the first preset value.
Optionally, the high voltage distribution box includes a plurality of electronic control switches, and the controller unit correspondingly controls the main power on/off of the contactor unit and/or the power supply of the high voltage distribution box to the load through the electronic control switches.
Optionally, the load includes a high-voltage battery unit and a hoisting device, and the controller unit is connected and communicated with the high-voltage battery unit and the hoisting device through a bus.
Optionally, the contactor unit includes a contactor, a first controller and a wireless receiving module; the control end of the contactor is connected with the first controller;
the controller unit comprises a second controller and a wireless transmitting module; the first controller and the second controller communicate with each other through the wireless receiving module and the wireless transmitting module.
Optionally, the wireless receiving module and the wireless transmitting module are WIFI modules or ZigBee modules.
In a second aspect, the present invention provides a construction machine, which includes the above-mentioned upper-mounted plug-in electric operating system.
Optionally, the engineering machinery includes a charging gun, and an ac charger of the operating system is connected to the contactor unit through the charging gun to perform power input.
Optionally, the engineering machine includes an alarm unit, and the controller unit of the operating system is further configured to control the alarm unit to alarm accordingly according to the received ground insulation value of the dc bus.
Through the technical scheme, the controller unit is used for correspondingly controlling the main power on-off of the contactor unit and/or the output power of the load and/or the on-off of the power supply of the high-voltage distribution box to the load according to the received ground insulation value of the direct-current bus, and accordingly high-voltage fault isolation can be achieved.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of a top-loading electrical operating system according to one embodiment of the present invention;
FIG. 2 is a schematic view of a truck crane system according to an embodiment of the present invention;
fig. 3 is a logic diagram of a control power supply of a truck crane system according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
In order to achieve the above object, as shown in fig. 1, a first aspect of the present invention provides a plug-in operating system, including: the system comprises an insulation detection device, a controller unit, a direct current bus, a contactor unit, an alternating current charger and a high-voltage distribution box;
the main power output end of the contactor unit is connected with the power input end of the alternating current charger, the direct current bus is connected with the power output end of the alternating current charger, and the direct current bus supplies power to a load through the high-voltage distribution box;
the insulation detection device is used for acquiring the ground insulation value of the direct current bus;
the controller unit is used for correspondingly controlling the on-off of the main power of the contactor unit and/or the output power of the load and/or the on-off of the power supplied to the load by the high-voltage distribution box according to the received ground insulation value of the direct-current bus.
Optionally, the controller unit is further configured to, when it is determined that the ground insulation value of the dc bus is smaller than a first preset value, output a first power-off signal for controlling the high-voltage distribution box to supply power to the load for disconnection and output a second power-off signal for controlling the main power of the contactor for disconnection. Optionally, the load includes a hoisting device, and the controller unit is further configured to output a low-power operating signal for controlling the hoisting device to reduce output power when it is determined that the insulation value to ground of the dc bus is greater than or equal to a second preset value and less than the first preset value. Optionally, the high voltage distribution box includes a plurality of electronic control switches, and the controller unit correspondingly controls the main power on/off of the contactor unit and/or the power supply of the high voltage distribution box to the load through the electronic control switches. Optionally, the load includes a high-voltage battery unit and a hoisting device, and the controller unit is connected and communicated with the high-voltage battery unit and the hoisting device through a bus. Optionally, the contactor unit includes a contactor, a first controller and a wireless receiving module; the control end of the contactor is connected with the first controller; the controller unit comprises a second controller and a wireless transmitting module; the first controller and the second controller communicate with each other through the wireless receiving module and the wireless transmitting module. Optionally, the wireless receiving module and the wireless transmitting module are WIFI modules or ZigBee modules.
Specifically, an insulation detection device inside the high-voltage battery unit detects the ground insulation resistance value of the direct-current bus in real time, when the ground insulation resistance value of the direct-current bus is abnormal, the high-voltage battery unit sends abnormal data to a second controller through a CAN (controller area network) line, and the second controller makes calculation and judgment according to the ground insulation resistance value, so that a low-voltage flow is started, and a main negative contactor correspondingly connected with the high-voltage battery unit in a high-voltage distribution box is disconnected; for the external power supply part, the second controller sends down high-voltage command information to the wireless sending module, the wireless sending module sends down high-voltage commands to the wireless receiving module through wireless networks such as WifI networks or ZigBee network signals, the wireless receiving module controls the three-phase power supply alternating current contactor in the junction box to be disconnected, and therefore an external alternating current three-phase power supply is disconnected, and the external power supply part can also be controlled through wired signals.
In a second aspect, the invention provides a construction machine, which is preferably a truck crane as shown in fig. 2, wherein the truck crane comprises the above-mentioned upper-mounted plug-in electric operating system. The mobile crane comprises a charging gun, and an alternating current charger of the operating system is connected with the contactor unit through the charging gun to carry out power input. The automobile crane comprises an alarm unit, and the controller unit of the operation system is also used for correspondingly controlling the alarm unit to alarm according to the received ground insulation value of the direct current bus.
Specifically, the three-phase commercial power supply can be converted into a high-voltage direct-current power supply which can be directly used by a high-voltage system of the pure automobile crane through an alternating-current charger and an alternating-current charging gun, and the high-voltage direct-current power supply is a main energy source for uninterrupted operation of the automobile crane.
The automobile crane further comprises a brake unit, the brake unit is connected with the lifting equipment through a corresponding contactor, and the contactor corresponding to the brake unit is controlled through a second controller to determine whether the contactor is connected with the lifting equipment. Preferably, the hoisting device comprises a hoisting machine and a hoisting electric driver; the winch electric driver outputs a low-power operation signal for reducing the output power through a second controller in the controller unit, and controls the working power of the winch. As shown in fig. 3, a preset value 1 (a first preset value) and a preset value 2 (a second preset value) are preset inside the controller, the preset value 1 is set to be 600 Ω/V, the preset value 2 is set to be 500 Ω/V, and real-time ground insulation resistance value information is compared and judged with the preset values; when the second controller detects that the ground insulation resistance value > = a preset value 1 through the insulation detection device, the automobile hoisting high-voltage ground insulation resistance is normal, and the second controller controls the instrument to display that the ground insulation resistance value is normal; if the preset value 1> insulation resistance to ground > = the preset value 2 is detected, the second controller controls the instrument to display insulation resistance to ground for alarming, and an operator is reminded to take the vehicle; the second controller also sends out a power-down operation command through the bus; after the winch electric driving wire sends a power reduction operation command to the second controller, controlling the motor to reduce the power to operate, such as reducing the power by 50%; if the preset value 2 is detected to be larger than the ground insulation resistance value, the second controller controls the instrument to display the ground insulation resistance value for alarming and reminds an operator to forcibly lower the high voltage; if the preset value 2 is detected to be larger than the ground insulation resistance value, the second controller triggers a lower high-voltage process; and sending a power-down command to the bus; after the winch is electrically driven to a power-off command of the second controller, controlling the motor to stop; the triggering low-voltage process comprises the steps that each distribution contactor in the high-voltage distribution box is controlled to be disconnected through a first power-off signal, if the contactor corresponding to the high-voltage battery unit is controlled to be disconnected, then a main positive contactor and a main negative contactor in the high-voltage battery unit are controlled to be disconnected; after high-voltage direct-current disconnection of a high-voltage process is triggered, the second controller sends a contactor unit disconnection command (a second power-off signal for disconnection of the main power of the contactor) to the wireless sending module, and after the contactor unit receives the command through the wireless receiving module, the contactor unit controls the corresponding contactor to be disconnected, so that the three-phase alternating-current mains supply is disconnected. The insulation detection device may be implemented by using a device or a circuit corresponding to an existing balanced bridge method, an unbalanced bridge method, an alternating current injection method or a current sensing method, and the invention is not particularly limited. For example, HS-020-3101, the insulation resistance value of a system can be dynamically detected on line in real time by Hebei deep sea electrical apparatus Co., ltd; the self-diagnosis and automatic calibration functions are realized; the leakage capacitance of the system can be automatically adapted; three output interfaces of PWM, CAN and ALARM CAN be provided, the volume is small, and the installation is convenient.
The power supply system can disconnect all high-voltage power supplies when the insulation is abnormal, and the high-voltage safety of the use of the automobile crane is guaranteed. The three-phase alternating current contactor in the contactor unit can be replaced by other high-power switch elements; the inside earth leakage protection device that can also integrate of terminal box can protect the safe power consumption of automobile crane external power supply effectively.
Therefore, the power supply system can be suitable for the working condition that multiple power supplies of the high-voltage system supply power simultaneously when the engineering machinery is in power-on and power-off operation, and under the working condition, all the high-voltage power supplies are required to be disconnected when the insulation is abnormal, so that the high-voltage safety can be guaranteed.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
In addition, any combination of various embodiments of the present invention may be made, and the same should be considered as what is disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (7)
1. A top-loading patch cord operating system, the operating system comprising: the device comprises an insulation detection device, a controller unit, a direct current bus, a contactor unit, an alternating current charger and a high-voltage distribution box; the upper-mounted plug-in operation system is applied to an automobile crane;
the main power output end of the contactor unit is connected with the power input end of the alternating current charger, the direct current bus is connected with the power output end of the alternating current charger, and the direct current bus supplies power to a load through the high-voltage distribution box;
the insulation detection device is used for acquiring the ground insulation value of the direct current bus;
the controller unit is used for correspondingly controlling the main power on-off of the contactor unit and/or the output power of the load and/or the on-off of the power supply of the high-voltage distribution box to the load according to the received ground insulation value of the direct-current bus;
the contactor unit comprises a contactor, a first controller and a wireless receiving module; the control end of the contactor is connected with the first controller;
the controller unit comprises a second controller and a wireless transmitting module; the first controller and the second controller are communicated with each other through the wireless receiving module and the wireless transmitting module;
a contactor corresponding to the brake unit of the automobile crane is controlled by the second controller to be connected with lifting equipment of the automobile crane or not;
the second controller executes a corresponding preset rule by comparing the magnitude relation between the real-time ground insulation value and a preset insulation value; wherein the content of the first and second substances,
the preset insulation value comprises a first insulation value and a second insulation value;
if the real-time ground insulation value is not less than the first insulation value, the real-time ground insulation value is normal;
if the real-time ground insulation value is smaller than the first insulation value and larger than or equal to a second insulation value, the second controller controls the instrument to display a ground insulation resistance value for alarming, the second controller also sends a power reduction operation command through the bus, and after the winch electrically drives the wiring to the second controller to send the power reduction operation command, the motor is controlled to operate in a power reduction mode;
if the real-time ground insulation value is smaller than the second insulation value, the second controller controls the instrument to display a ground insulation resistance value for alarming and triggers a lower high-voltage process;
the triggering of the low-pressure process comprises the following steps: controlling the contactors corresponding to the high-voltage battery unit to be disconnected, and then controlling the main positive contactor and the main negative contactor inside the high-voltage battery unit to be disconnected; after high-voltage direct-current disconnection of the high-voltage process is triggered, the second controller sends a contactor unit disconnection command to the wireless sending module, and the contactor unit controls the corresponding contactor to be disconnected after receiving the command through the wireless receiving module, so that the three-phase alternating-current commercial power supply is disconnected.
2. The work system of claim 1, wherein said high voltage distribution box comprises a plurality of electrically controlled switches, whereby said controller unit controls the switching of the main power of said contactor unit and/or the switching of the power supplied by said high voltage distribution box to said load, respectively.
3. The work system of claim 1, the load comprising a high voltage battery unit and a hoist, wherein the controller unit is in connected communication with the high voltage battery unit and the hoist via a bus.
4. The operating system of claim 3, wherein the wireless receiving module and the wireless transmitting module are WIFI modules or ZigBee modules.
5. A mobile crane, comprising the top-loading electrical operation system of any one of claims 1 to 4.
6. The mobile crane according to claim 5, wherein the mobile crane comprises a charging gun, and an alternating current charger of the operating system is connected with the contactor unit through the charging gun for power input.
7. The mobile crane according to claim 5, wherein the mobile crane comprises an alarm unit, and the controller unit of the operation system is further configured to control the alarm unit to alarm accordingly according to the received insulation value to ground of the DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314796.XA CN112636301B (en) | 2020-11-21 | 2020-11-21 | Upper-mounted plug-in electric operating system and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011314796.XA CN112636301B (en) | 2020-11-21 | 2020-11-21 | Upper-mounted plug-in electric operating system and engineering machinery |
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| CN112636301A CN112636301A (en) | 2021-04-09 |
| CN112636301B true CN112636301B (en) | 2023-02-24 |
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| CN112636301A (en) | 2021-04-09 |
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