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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- 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
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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
- H02H3/16—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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
本发明提供一种上装插电作业系统和一种工程机械，属于工程机械领域。所述作业系统包括：绝缘检测装置、控制器单元、直流母线、接触器单元、交流充电机和高压配电盒；所述接触器单元的主电输出端与所述交流充电机的电源输入端连接，所述直流母线连接于所述交流充电机的电源输出端，所述直流母线通过所述高压配电盒向负载供电；所述绝缘检测装置用于采集所述直流母线的对地绝缘值；所述控制器单元用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述接触器单元的主电通断和/或所述负载的输出功率和/或所述高压配电盒向所述负载供电的通断。本发明可以在绝缘异常时需断开所有高压电源，保障工程机械使用的高压安全。
The invention provides a bodywork plug-in operation system and a construction machine, which belong to the field of construction machines. The operating system includes: an insulation detection device, a controller unit, a DC bus, a contactor unit, an AC charger, and a high-voltage power distribution box; the main power output end of the contactor unit and the power input end of the AC charger connected, the DC bus is connected to the power output end of the AC charger, and the DC bus supplies power to the load through the high-voltage power distribution box; the insulation detection device is used to collect the ground insulation value of the DC bus ; The controller unit is used to control the main power on and off of the contactor unit and/or the output power of the load and/or the high voltage according to the received insulation value of the DC bus bar to ground On and off of the power distribution box to the load. The invention can disconnect all high-voltage power sources when the insulation is abnormal, so as to ensure the high-voltage safety of construction machinery.
Description
技术领域technical field
本发明涉及工程机械领域，具体地涉及一种上装插电作业系统和一种工程机械。The invention relates to the field of engineering machinery, in particular to a top-mounted plug-in operation system and an engineering machinery.
背景技术Background technique
工程机械(如起重机、泵车、挖掘机)因其工作特性，大部分时间工作于野外工地或建筑工地，且因工期等原因，大部分时候工程机械需长时间不间断工作；而工程机械的高压电池容量有限，不能支持工程机械长时间不间断作业。现有技术中大部分建筑工地或施工场所会有稳定的交流电源可用，工程机械大部分时间工作在插电作业状态，上装作业存在多个高压电源，因此，上装作业时高压安全非常重要。Due to their working characteristics, construction machinery (such as cranes, pump trucks, and excavators) work on field sites or construction sites most of the time, and due to construction schedules and other reasons, most of the time construction machinery needs to work uninterrupted for a long time; and construction machinery The capacity of the high-voltage battery is limited, and it cannot support the uninterrupted operation of construction machinery for a long time. In the prior art, most construction sites or construction sites have a stable AC power supply available. Construction machinery works in a plugged-in state most of the time, and there are multiple high-voltage power sources in the bodywork operation. Therefore, high-voltage safety during bodywork operations is very important.
现有技术中上装作业安全策略主要针对上装低压安全操作，外接电源作业时无相关高压保护措施；因此，在上车插电作业时，有触电风险。The safety strategy of bodywork in the prior art is mainly aimed at the low-voltage safe operation of bodywork, and there is no relevant high-voltage protection measure when working with an external power supply; therefore, there is a risk of electric shock when the vehicle is plugged in for operation.
发明内容Contents of the invention
本发明实施方式的目的是提供一种上装插电作业系统和一种工程机械，以至少解决上述工程机械的高压保护问题。The purpose of the embodiments of the present invention is to provide a bodywork plug-in operation system and a construction machine, so as to at least solve the above-mentioned high-voltage protection problem of the construction machine.
为了实现上述目的，本发明第一方面提供一种上装插电作业系统，所述作业系统包括：绝缘检测装置、控制器单元、直流母线、接触器单元、交流充电机和高压配电盒；In order to achieve the above object, the first aspect of the present invention provides a bodywork plug-in operation system, the operation system includes: an insulation detection device, a controller unit, a DC bus, a contactor unit, an AC charger and a high-voltage distribution box;
所述接触器单元的主电输出端与所述交流充电机的电源输入端连接，所述直流母线连接于所述交流充电机的电源输出端，所述直流母线通过所述高压配电盒向负载供电；The main power output end of the contactor unit is connected to the power input end of the AC charger, the DC bus is connected to the power output end of the AC charger, and the DC bus is connected to the power supply through the high-voltage power distribution box. Load power supply;
所述绝缘检测装置用于采集所述直流母线的对地绝缘值；The insulation detection device is used to collect the ground insulation value of the DC bus;
所述控制器单元用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述接触器单元的主电通断和/或所述负载的输出功率和/或所述高压配电盒向所述负载供电的通断。The controller unit is used to correspondingly control the on-off of the main power of the contactor unit and/or the output power of the load and/or the The electric box supplies power to the load on and off.
可选的，所述控制器单元还用于在确定所述直流母线的对地绝缘值小于第一预设值时，输出控制所述高压配电盒向所述负载供电断开的第一断电信号以及输出控制所述接触器的主电断开的第二断电信号。Optionally, the controller unit is further configured to, when it is determined that the insulation value of the DC bus bar to ground is less than a first preset value, output a first disconnection signal for controlling the disconnection of the high-voltage power distribution box to supply power to the load. An electrical signal and outputting a second power-off signal for controlling the disconnection of the main power of the contactor.
可选的，所述负载包括起升设备，所述控制器单元还用于在确定所述直流母线的对地绝缘值大于等于第二预设值且小于所述第一预设值时，输出控制所述起升设备降低输出功率的低功率运行信号。Optionally, the load includes a lifting device, and the controller unit is further configured to, 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, output A low power running signal for controlling the lifting device to reduce the output power.
可选的，所述高压配电盒包括多个电控开关，所述控制器单元通过电控开关相应地控制所述接触器单元的主电通断和/或所述高压配电盒向所述负载供电的通断。Optionally, the high-voltage power distribution box includes a plurality of electric control switches, and the controller unit controls the main power on and off of the contactor unit and/or the high-voltage power distribution box On and off of the load power supply.
可选的，所述负载包括高压电池单元和起升设备，所述控制器单元通过总线与所述高压电池单元和所述起升设备连接通信。Optionally, the load includes a high-voltage battery unit and a lifting device, and the controller unit communicates with the high-voltage battery unit and the lifting device through a bus.
可选的，所述接触器单元包括接触器、第一控制器和无线接收模块；所述接触器的控制端连接所述第一控制器；Optionally, the contactor unit includes a contactor, a first controller and a wireless receiving module; the control terminal of the contactor is connected to the first controller;
所述控制器单元包括第二控制器和无线发射模块；所述第一控制器和所述第二控制器通过所述无线接收模块和所述无线发射模块相互通信。The controller unit includes 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.
可选的，所述无线接收模块和所述无线发射模块为WIFI模块或ZigBee模块。Optionally, the wireless receiving module and the wireless transmitting module are WIFI modules or ZigBee modules.
本发明第而方面提供一种工程机械，工程机械包括上述的上装插电作业系统。The second aspect of the present invention provides a construction machine, which includes the above-mentioned top-mounted plug-in operation system.
可选的，所述工程机械包括充电枪，所述作业系统的交流充电机通过所述充电枪连接所述接触器单元进行电源输入。Optionally, the construction machine includes a charging gun, and the AC charger of the working system is connected to the contactor unit through the charging gun for power input.
可选的，所述工程机械包括报警单元，所述作业系统的控制器单元还用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述报警单元进行报警。Optionally, the construction machine includes an alarm unit, and the controller unit of the operation system is further configured to correspondingly control the alarm unit to give an alarm according to the received insulation value of the DC bus to ground.
通过上述技术方案，控制器单元用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述接触器单元的主电通断和/或所述负载的输出功率和/或所述高压配电盒向所述负载供电的通断，可以相应实现高压故障隔离。Through the above technical solution, the controller unit is used to correspondingly control the on-off of the main power of the contactor unit and/or the output power of the load and/or the received ground insulation value of the DC bus. The high-voltage power distribution box can switch on and off the power supply to the load, and the high-voltage fault isolation can be realized accordingly.
本发明实施方式的其它特征和优点将在随后的具体实施方式部分予以详细说明。Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description.
附图说明Description of drawings
附图是用来提供对本发明实施方式的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本发明实施方式，但并不构成对本发明实施方式的限制。在附图中：The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the embodiments of the present invention, but do not constitute limitations to the embodiments of the present invention. In the attached picture:
图1是本发明一种实施方式提供的一种上装插电作业系统示意图；Fig. 1 is a schematic diagram of a bodywork plug-in operation system provided by an embodiment of the present invention;
图2是本发明一种实施方式提供的一种汽车起重机系统示意图；Fig. 2 is a schematic diagram of a truck crane system provided by an embodiment of the present invention;
图3是本发明一种实施方式提供的一种汽车起重机系统控制供电的逻辑示意图。Fig. 3 is a logical schematic diagram of a truck crane system control power supply provided by an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
为了实现上述目的，如图1所示，本发明第一方面提供一种上装插电作业系统，所述作业系统包括：绝缘检测装置、控制器单元、直流母线、接触器单元、交流充电机和高压配电盒；In order to achieve the above purpose, as shown in Figure 1, the first aspect of the present invention provides a bodywork plug-in operation system, the operation system includes: an insulation detection device, a controller unit, a DC bus, a contactor unit, an AC charger and High voltage distribution box;
所述接触器单元的主电输出端与所述交流充电机的电源输入端连接，所述直流母线连接于所述交流充电机的电源输出端，所述直流母线通过所述高压配电盒向负载供电；The main power output end of the contactor unit is connected to the power input end of the AC charger, the DC bus is connected to the power output end of the AC charger, and the DC bus is connected to the power supply through the high-voltage power distribution box. Load power supply;
所述绝缘检测装置用于采集所述直流母线的对地绝缘值；The insulation detection device is used to collect the ground insulation value of the DC bus;
所述控制器单元用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述接触器单元的主电通断和/或所述负载的输出功率和/或所述高压配电盒向所述负载供电的通断。The controller unit is used to correspondingly control the on-off of the main power of the contactor unit and/or the output power of the load and/or the The electric box supplies power to the load on and off.
可选的，所述控制器单元还用于在确定所述直流母线的对地绝缘值小于第一预设值时，输出控制所述高压配电盒向所述负载供电断开的第一断电信号以及输出控制所述接触器的主电断开的第二断电信号。可选的所述负载包括起升设备，所述控制器单元还用于在确定所述直流母线的对地绝缘值大于等于第二预设值且小于所述第一预设值时，输出控制所述起升设备降低输出功率的低功率运行信号。可选的，所述高压配电盒包括多个电控开关，所述控制器单元通过电控开关相应地控制所述接触器单元的主电通断和/或所述高压配电盒向所述负载供电的通断。可选的，所述负载包括高压电池单元和起升设备，所述控制器单元通过总线与所述高压电池单元和所述起升设备连接通信。可选的，所述接触器单元包括接触器、第一控制器和无线接收模块；所述接触器的控制端连接所述第一控制器；所述控制器单元包括第二控制器和无线发射模块；所述第一控制器和所述第二控制器通过所述无线接收模块和所述无线发射模块相互通信。可选的，所述无线接收模块和所述无线发射模块为WIFI模块或ZigBee模块。Optionally, the controller unit is further configured to, when it is determined that the insulation value of the DC bus bar to ground is less than a first preset value, output a first disconnection signal for controlling the disconnection of the high-voltage power distribution box to supply power to the load. An electrical signal and outputting a second power-off signal for controlling the disconnection of the main power of the contactor. Optionally, the load includes a lifting device, and the controller unit is further configured to output control A low power run signal for the hoisting device to reduce output power. Optionally, the high-voltage power distribution box includes a plurality of electric control switches, and the controller unit controls the main power on and off of the contactor unit and/or the high-voltage power distribution box On and off of the load power supply. Optionally, the load includes a high-voltage battery unit and a lifting device, and the controller unit communicates with the high-voltage battery unit and the lifting device through a bus. Optionally, the contactor unit includes a contactor, a first controller and a wireless receiving module; the control terminal of the contactor is connected to the first controller; the controller unit includes a second controller and a wireless transmitter 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.
具体的，高压电池单元内部的绝缘检测装置实时检测直流母线对地绝缘电阻值，当直流母线对地绝缘电阻值异常时，高压电池单元通过CAN线发送异常数据给第二控制器，第二控制器根据对地绝缘电阻值的大小，做出计算判断，从而开启下高压流程，断开高压配电盒中高压电池单元对应连接的主负接触器；对于外接电源部分，第二控制器发送下高压命令信息给无线发送模块，无线发送模通过WifI网络或ZigBee网络信号等无线网络把下高压命令发送给无线接收模块，无线接收模块控制接线盒内部的三相供电交流接触器断开，从而断开外接交流三相电源，外接电源部分也可以通过有线信号进行控制。Specifically, the insulation detection device inside the high-voltage battery unit detects the insulation resistance value of the DC bus to the ground in real time. When the insulation resistance of the DC bus to the ground is abnormal, the high-voltage battery unit sends abnormal data to the second controller through the CAN line, and the second control The controller makes a calculation and judgment according to the value of the insulation resistance to the ground, thereby starting the high-voltage process and disconnecting the main negative contactor connected to the high-voltage battery unit in the high-voltage power distribution box; for the external power supply part, the second controller sends the next The high-voltage command information is sent to the wireless sending module, and the wireless sending module sends the high-voltage command to the wireless receiving module through a wireless network such as WifI network or ZigBee network signal, and the wireless receiving module controls the three-phase power supply AC contactor inside the junction box to disconnect, thereby disconnecting Open the external AC three-phase power supply, and the external power supply part can also be controlled by wired signals.
本发明第二方面提供一种工程机械，如图2所示，工程机械优选的汽车起重机，汽车起重机包括上述上装插电作业系统。所述汽车起重机包括充电枪，所述作业系统的交流充电机通过所述充电枪连接所述接触器单元进行电源输入。所述汽车起重机包括报警单元，所述作业系统的控制器单元还用于根据接收到的所述直流母线的对地绝缘值，相应地控制所述报警单元进行报警。The second aspect of the present invention provides a construction machine. As shown in FIG. 2 , the construction machine is preferably a truck crane, and the truck crane includes the above-mentioned bodywork plug-in operation system. The truck crane includes a charging gun, and the AC charger of the operating system is connected to the contactor unit through the charging gun for power input. The truck crane includes an alarm unit, and the controller unit of the operation system is further configured to correspondingly control the alarm unit to give an alarm according to the received insulation value of the DC bus to ground.
具体地，通过交流充电机及交流充电枪，可以把三相市电电源转化为纯汽车起重机高压系统直接可使用的高压直流电源，是汽车起重机上装不间断作业的主要能量来源。Specifically, through the AC charger and the AC charging gun, the three-phase mains power supply can be converted into a high-voltage DC power supply that can be directly used by the high-voltage system of the pure truck crane, which is the main energy source for the uninterrupted operation of the truck crane.
所述汽车起重机还包括制动单元，制动单元通过相应的接触器与起升设备进行连接，制动单元对应的接触器通过第二控制器控制是否与起升设备连接。优选的，上述的起升设备包括卷扬机和卷扬电驱；卷扬电驱通过控制器单元中的第二控制器输出降低输出功率的低功率运行信号，控制卷扬机的工作功率。如图3所示，控制器内部预先设置预设值1(第一预设值)和预设值2(第二预设值)，预设值1设置为600Ω/V，预设值2设置为500Ω/V，把实时对地绝缘阻值信息和预设值进行比较判断；第二控制器通过绝缘检测装置检测到对地绝缘阻值>＝预设值1，则汽车起重高压对地绝缘电阻正常，第二控制器控制仪表显示对地绝缘阻值正常；若检测到预设值1>对地绝缘阻值>＝预设值2，则第二控制器控制仪表显示对地绝缘阻值报警，提醒操作员收车；第二控制器还通过总线发出降功率运行命令；卷扬电驱接线到第二控制器发出降功率运行命令后，控制电机降功率运行，比如降低50％的功率；若检测到预设值2>对地绝缘阻值，则第二控制器控制仪表显示对地绝缘阻值报警，提醒操作员强制下高压；若检测到预设值2>对地绝缘阻值，则第二控制器触发下高压流程；并向总线发出下电命令；卷扬电驱接线到第二控制器的下电命令后，控制电机停止；触发下高压流程包括通过第一断电信号控制高压配电盒内部各配电接触器断开，如控制高压电池单元对应的接触器断开，然后控制高压电池单元内部主正、主负接触器断开；触发下高压流程高压直流断开后，第二控制器向无线发送模块发送接触器单元断开命令(所述接触器的主电断开的第二断电信号)，接触器单元通过无线接收模块接收到该命令后，控制相应的接触器断开，从而断开三相交流市电电源。绝缘检测装置可以采用现有的平衡桥法或者不平衡桥法或者交流电注入法或者电流传感法对应的装置或者电路进行实现，本发明不做具体限定。如河北深海电器有限公司，HS-020-3101，可以在线实时动态检测系统的绝缘电阻值；具有自诊断和自动校准功能；可以自动适应系统的泄漏电容；可以提供PWM、CAN、ALARM三种输出接口，体积小，便于安装。The truck crane also includes a braking unit, which is connected to the lifting device through a corresponding contactor, and whether the contactor corresponding to the braking unit is connected to the lifting device is controlled by a second controller. Preferably, the above-mentioned hoisting equipment includes a hoist and a hoist electric drive; the hoist electric drive outputs a low-power operation signal that reduces the output power through the second controller in the controller unit to control the working power of the hoist. As shown in Figure 3, preset value 1 (first preset value) and preset value 2 (second preset value) are preset inside the controller, preset value 1 is set to 600Ω/V, and preset value 2 is set to is 500Ω/V, compare and judge the real-time ground insulation resistance information with the preset value; the second controller detects that the ground insulation resistance value is >= preset value 1 through the insulation detection device, and the vehicle lifts the high voltage ground If the insulation resistance is normal, the second controller controls the instrument to display the normal insulation resistance value to the ground; value alarm to remind the operator to close the car; the second controller also sends out a power reduction operation command through the bus; after the winch electric drive is connected to the second controller to issue a power reduction operation command, it controls the motor to reduce power operation, such as reducing the power by 50%. Power; if it detects that the preset value 2 > the insulation resistance to ground, the second controller controls the instrument to display the insulation resistance alarm to the ground, reminding the operator to force the high voltage; if the preset value 2 > insulation resistance to ground is detected value, the second controller triggers the high-voltage process; and sends a power-off command to the bus; after the winch electric drive is connected to the second controller’s power-off command, the control motor stops; triggering the high-voltage process includes passing the first power-off The signal controls the disconnection of each power distribution contactor inside the high-voltage power distribution box, such as controlling the disconnection of the contactor corresponding to the high-voltage battery unit, and then controlling the disconnection of the main positive and main negative contactors inside the high-voltage battery unit; After opening, the second controller sends a contactor unit disconnection command (the second power-off signal that the main power of the contactor is disconnected) to the wireless sending module. After the contactor unit receives the order through the wireless receiving module, it controls The corresponding contactor opens, thereby disconnecting the three-phase AC mains power supply. The insulation detection device can be implemented by using devices or circuits corresponding to the existing balanced bridge method or unbalanced bridge method, alternating current injection method or current sensing method, which is not specifically limited in the present invention. For example, Hebei Shenhai Electric Co., Ltd., HS-020-3101, can dynamically detect the insulation resistance value of the system in real time online; has self-diagnosis and automatic calibration functions; can automatically adapt to the leakage capacitance of the system; can provide PWM, CAN, ALARM three outputs Interface, small size, easy to install.
本发明中的供电系统可以在绝缘异常时断开所有高压电源，保障汽车起重机使用的高压安全。本发明中的接触器单元中的三相交流接触器可用其它大功率开关元件代替；接线盒内部还能集成漏电保护装置，能有效地保护汽车起重外部供电的安全用电。The power supply system in the present invention can cut off all high-voltage power supplies when the insulation is abnormal, so as to ensure the high-voltage safety of the truck crane. The three-phase AC contactor in the contactor unit of the present invention can be replaced by other high-power switching elements; the leakage protection device can also be integrated inside the junction box, which can effectively protect the safe power consumption of the external power supply of the automobile crane.
因此，本发明中的供电系统能适用工程机械上装插电作业时，高压系统多电源同时供电的工况，在该工况下，绝缘异常时需断开所有高压电源，才能保障高压安全。Therefore, the power supply system in the present invention can be applied to the working condition that multiple power supplies of the high-voltage system supply power at the same time when the construction machinery is installed and plugged in. Under this working condition, all high-voltage power supplies need to be disconnected when the insulation is abnormal to ensure high-voltage safety.
以上结合附图详细描述了本发明的可选实施方式，但是，本发明实施方式并不限于上述实施方式中的具体细节，在本发明实施方式的技术构思范围内，可以对本发明实施方式的技术方案进行多种简单变型，这些简单变型均属于本发明实施方式的保护范围。另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合。为了避免不必要的重复，本发明实施方式对各种可能的组合方式不再另行说明。The optional embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the embodiments of the present invention, the technical aspects of the embodiments of the present invention can be Various simple modifications are made to the scheme, and these simple modifications all belong to the protection scope of the embodiments of the present invention. In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the embodiments of the present invention.
此外，本发明的各种不同的实施方式之间也可以进行任意组合，只要其不违背本发明实施方式的思想，其同样应当视为本发明实施方式所公开的内容。In addition, any combination of various implementations of the present invention can also be made, as long as they do not violate the idea of the implementations of the present invention, they should also be regarded as the content disclosed in the implementations of the present invention.
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