CN114148185A - Power mode control method and system for super-tonnage hybrid power loader - Google Patents

Power mode control method and system for super-tonnage hybrid power loader Download PDF

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Publication number
CN114148185A
CN114148185A CN202010934943.7A CN202010934943A CN114148185A CN 114148185 A CN114148185 A CN 114148185A CN 202010934943 A CN202010934943 A CN 202010934943A CN 114148185 A CN114148185 A CN 114148185A
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power mode
power
storage battery
energy storage
loader
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CN202010934943.7A
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CN114148185B (en
Inventor
邱欣
付如愿
刘辉荣
刘猛
梁金成
唐勋路
俞鹏程
闫小宇
喻通
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Zhuzhou National Engineering Research Center of Converters Co Ltd
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Zhuzhou National Engineering Research Center of Converters Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2062—Control of propulsion units
    • E02F9/207—Control of propulsion units of the type electric propulsion units, e.g. electric motors or generators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2062—Control of propulsion units
    • E02F9/2075—Control of propulsion units of the hybrid type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2091—Control of energy storage means for electrical energy, e.g. battery or capacitors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • 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
    • Y02T10/62—Hybrid vehicles
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

The application discloses a power mode control method and a system of a super-tonnage hybrid power loader, which comprises the following steps: acquiring the operation content of the loader and the state information of the hybrid system; determining a power mode of the hybrid system according to the operation content and/or the state information; starting the loader in the power mode; wherein, thoughtlessly move the system and include: the diesel engine, the generator and the transfer case are mounted in a coupling manner; a hydraulic system connected with the transfer case; comprises an energy storage battery and an electric traction system connected with a generator. The hybrid system disclosed by the application does not need traditional hydraulic transmission components, and the components are easy to select; meanwhile, the hybrid system has two power sources of a diesel engine and an energy storage battery, the electric traction system has the advantage of fast and flexible power output, and the whole hybrid system can select the most appropriate power mode according to the actual situation, so that the effects of high efficiency, energy conservation and fast feedback are realized.

Description

Power mode control method and system for super-tonnage hybrid power loader
Technical Field
The invention relates to the field of loader transmission, in particular to a power mode control method and a power mode control system for a super-tonnage hybrid power loader.
Background
In order to improve the dynamic property of the whole vehicle, reduce the impact of a transmission system and improve the driving comfort of a driver, the traditional loader is generally provided with a hydraulic torque converter. Through hydraulic transmission, the hydraulic torque converter can play the effect of keeping apart engine and transmission shaft, plays the effect that reduces speed reduction when the heavy load increases the turn round, reduces the load impact of engine and transmission shaft when the load is undulant. However, the efficiency of the hydraulic torque converter is very low during heavy load, and most of mechanical energy is converted into heat energy of transmission oil, so that the oil consumption of the loader is large and the pollutant emission is serious.
Especially, the super large loader with rated capacity larger than 12 tons, also called super large tonnage loader, is applied to large engineering and mine working conditions, has wide market demand, but is limited by the difficulty of the type selection of the transmission part of the hydraulic transmission scheme and the slow feedback of the low efficiency, and the domestic main engine plant does not have the large tonnage loader with better transmission performance.
Therefore, how to provide a solution to the above technical problems is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a power mode control method and system for a super-tonnage hybrid loader, which is easy to select, efficient, energy-saving, and fast in response. The specific scheme is as follows:
a power mode control method of an ultra-large tonnage hybrid power loader comprises the following steps:
acquiring the operation content of the loader and the state information of the hybrid system;
determining a power mode of the hybrid system according to the operation content and/or the state information;
starting the loader in the power mode;
wherein, the thoughtlessly moving system includes:
the diesel engine, the generator and the transfer case are mounted in a coupling manner;
a hydraulic system connected with the transfer case;
the system comprises an energy storage battery and an electric traction system connected with the generator.
Preferably, the power modes include:
a first power mode using the diesel engine as a power energy source;
a second power mode using the diesel engine and the energy storage battery as power sources;
a third power mode using the energy storage battery as a power source;
a fourth power mode in which braking energy of the loader is received by the electric traction system.
Preferably, the work content includes a shoveling work and/or a traveling work.
Preferably, the status information is specifically an intermediate dc voltage value of the electric traction system;
correspondingly, the process of determining the power mode of the hybrid system according to the state information includes:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is the first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is the second power mode;
and when the intermediate direct-current voltage value is not smaller than the second preset value, determining that the power mode of the hybrid system is the fourth power mode.
Preferably, the fourth power mode is specifically:
when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives the braking energy;
and when the electric quantity of the energy storage battery reaches the preset electric quantity, receiving the braking energy by a braking resistor in the electric traction system.
Preferably, the power mode control method further includes:
and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is the third power mode.
Preferably, the electric traction system comprises:
the input end of the converter is connected with the generator;
the hub motor, the energy storage battery and the brake resistor are connected with the converter.
Preferably, the current transformer includes: the three-phase inverter comprises a three-phase rectifier bridge, an intermediate direct-current voltage module and a plurality of three-phase inversion modules;
the input end of the three-phase rectifier bridge is connected with the generator, and the output end of the three-phase rectifier bridge is connected with the input end of the intermediate direct-current voltage module;
the input ends of the three-phase inversion modules are connected with the output end of the intermediate direct-current voltage module, and the output end of each three-phase inversion module is connected with one hub motor;
the input end of the energy storage battery and the input end of the brake resistor are connected with the output end of the middle direct-current voltage module through respective auxiliary switch tubes.
Preferably, the electric traction system comprises four of said in-wheel motors.
Correspondingly, the invention also discloses a power mode control system of the super-tonnage hybrid power loader, which comprises the following steps:
the acquisition module is used for acquiring the operation content of the loader and the state information of the hybrid system;
the mode determining module is used for determining a power mode of the hybrid system according to the operation content and/or the state information;
an action module for starting the loader in the power mode;
wherein, the thoughtlessly moving system includes:
the diesel engine, the generator and the transfer case are mounted in a coupling manner;
a hydraulic system connected with the transfer case;
the system comprises an energy storage battery and an electric traction system connected with the generator.
Preferably, the power modes include:
a first power mode using the diesel engine as a power energy source;
a second power mode using the diesel engine and the energy storage battery as power sources;
a third power mode using the energy storage battery as a power source;
a fourth power mode in which braking energy of the loader is received by the electric traction system.
Preferably, the work content includes a shoveling work and/or a traveling work.
Preferably, the status information is specifically an intermediate dc voltage value of the electric traction system;
correspondingly, the process of determining the power mode of the hybrid system by the mode determination module according to the state information includes:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is the first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is the second power mode;
and when the intermediate direct-current voltage value is not smaller than the second preset value, determining that the power mode of the hybrid system is the fourth power mode.
Preferably, the fourth power mode is specifically:
when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives the braking energy;
and when the electric quantity of the energy storage battery reaches the preset electric quantity, receiving the braking energy by a braking resistor in the electric traction system.
Preferably, the mode determination module is further configured to:
and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is the third power mode.
Preferably, the electric traction system comprises:
the input end of the converter is connected with the generator;
the hub motor, the energy storage battery and the brake resistor are connected with the converter.
Preferably, the current transformer includes: the three-phase inverter comprises a three-phase rectifier bridge, an intermediate direct-current voltage module and a plurality of three-phase inversion modules;
the input end of the three-phase rectifier bridge is connected with the generator, and the output end of the three-phase rectifier bridge is connected with the input end of the intermediate direct-current voltage module;
the input ends of the three-phase inversion modules are connected with the output end of the intermediate direct-current voltage module, and the output end of each three-phase inversion module is connected with one hub motor;
the input end of the energy storage battery and the input end of the brake resistor are connected with the output end of the middle direct-current voltage module through respective auxiliary switch tubes.
Preferably, the electric traction system comprises four of said in-wheel motors.
The application discloses a power mode control method of a super-tonnage hybrid power loader, which comprises the following steps: acquiring the operation content of the loader and the state information of the hybrid system; determining a power mode of the hybrid system according to the operation content and/or the state information; starting the loader in the power mode; wherein, the thoughtlessly moving system includes: the diesel engine, the generator and the transfer case are mounted in a coupling manner; a hydraulic system connected with the transfer case; the system comprises an energy storage battery and an electric traction system connected with the generator. The hybrid system disclosed by the application does not need traditional hydraulic transmission components, and the components are easy to select; meanwhile, the hybrid system has two power sources of a diesel engine and an energy storage battery, the electric traction system has the advantage of fast and flexible power output, and the whole hybrid system can select the most appropriate power mode according to the actual situation, so that the effects of high efficiency, energy conservation and fast feedback are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart illustrating steps of a power mode control method according to an embodiment of the present invention;
FIG. 2 is a structural distribution diagram of a hybrid system according to an embodiment of the present invention;
FIG. 3 is a block diagram of an electric traction system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a power mode control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The super-large loader with the rated capacity larger than 12 tons, also called super-large tonnage loader, is applied to large-scale engineering and mine working conditions, has wide market demand, but is difficult to select the transmission part and slow feedback of low efficiency due to a hydraulic transmission scheme, and a domestic host factory does not have the large-tonnage loader with better transmission performance. The hybrid system disclosed by the application does not need traditional hydraulic transmission components, and the components are easy to select; meanwhile, the hybrid system has two power sources of a diesel engine and an energy storage battery, the electric traction system has the advantage of fast and flexible power output, and the whole hybrid system can select the most appropriate power mode according to the actual situation, so that the effects of high efficiency, energy conservation and fast feedback are realized.
The embodiment of the invention discloses a power mode control method of a super-tonnage hybrid power loader, which is shown in figure 1 and comprises the following steps:
s1: acquiring the operation content of the loader and the state information of the hybrid system;
s2: determining a power mode of the hybrid system according to the operation content and/or the state information;
s3: starting the loader in the power mode;
as shown in fig. 2, the hybrid system includes:
the diesel engine 01, the generator 02 and the transfer case 03 are mounted in a coupling manner;
a hydraulic system 04 connected to the transfer case 03;
including an energy storage battery, an electric traction system 05 connected to a generator 02.
It can be understood that the working mode of the electric transmission system in the embodiment is different from that of the traditional electric transmission system, in the traditional electric transmission system, the generator is coaxial with the diesel engine, and the output power of the diesel engine is directly converted into the power of the traction system through the generator; in the embodiment, the shaft end of the generator 02 is connected with the diesel engine 01, the non-transmission shaft end of the generator 02 is connected with the transfer case 03, part of the output power of the generator 01 is transmitted to the hydraulic system 04 through the transfer case 03, and the other part of the output power of the generator 01 is transmitted to the electric traction system 05 through the generator 02. In addition, the electric traction system 05 is provided with two sets of energy supply systems, namely a generator 02 and an internal energy storage battery, wherein when the generator 02 cannot rapidly respond to load requirements, the energy storage battery rapidly responds to supplement electric energy; meanwhile, the energy storage battery can recover and store the braking energy of the hybrid system, so that the aims of saving energy and recycling are fulfilled.
The application discloses a power mode control method of a super-tonnage hybrid power loader, which comprises the following steps: acquiring the operation content of the loader and the state information of the hybrid system; determining a power mode of the hybrid system according to the operation content and/or the state information; starting the loader in the power mode; wherein, the thoughtlessly moving system includes: the diesel engine, the generator and the transfer case are mounted in a coupling manner; a hydraulic system connected with the transfer case; the system comprises an energy storage battery and an electric traction system connected with the generator. The hybrid system disclosed by the application does not need traditional hydraulic transmission components, and the components are easy to select; meanwhile, the hybrid system has two power sources of a diesel engine and an energy storage battery, the electric traction system has the advantage of fast and flexible power output, and the whole hybrid system can select the most appropriate power mode according to the actual situation, so that the effects of high efficiency, energy conservation and fast feedback are realized.
The embodiment of the invention discloses a specific power mode control method of a super-tonnage hybrid power loader, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, referring to fig. 3, the electric traction system 05 includes:
a converter 1 with an input end connected with the generator 02;
the wheel hub motor 2 is connected with the converter 1, the energy storage battery 3 and the brake resistor 4.
Further, the electric traction system 05 may include four in-wheel motors 2, and the four in-wheel motors 2 may be driven independently. In addition, other numbers of hub motors 2 and different driving modes can be selected, and the actual requirements of the loader can be met.
Specifically, the converter 1 includes: the three-phase rectifier bridge 11, the middle direct-current voltage module 12 and the plurality of three-phase inversion modules 13;
the input end of the three-phase rectifier bridge 11 is connected with the generator 02, and the output end is connected with the input end of the intermediate direct-current voltage module 12;
the input ends of the three-phase inversion modules 13 are connected with the output end of the intermediate direct-current voltage module 12, and the output end of each three-phase inversion module 13 is connected with one hub motor 2;
the input end of the energy storage battery 3 and the input end of the brake resistor 4 are connected with the output end of the intermediate direct-current voltage module 12 through respective auxiliary switching tubes.
Specifically, the energy storage module 3 includes, but is not limited to, a lithium battery, a super capacitor, and a hydrogen raw material battery, and the auxiliary switch tube thereof includes a switch cabinet and a DC-DC unit, wherein the DC-DC unit has a voltage step-up and step-down function, and can realize bidirectional energy flow. The energy storage module 3 and the brake resistor 4 can be matched with each other to recover the brake energy of the whole vehicle, and the energy storage module 3 can be used as a power supply supplement in emergency. In addition, the energy storage module 3 also provides a power supply for a control circuit of the whole electric traction system 05, the standard is direct current 24V, and the power supply fluctuation range caused by the whole vehicle running, which can be borne by the electric traction system 05, is DC + 9-36V.
It can be seen that the main circuit of the converter 1 includes a three-phase rectifier bridge 11, an intermediate dc voltage module 12, and a plurality of three-phase inverter modules 13, and the types of switching tubes and the resistance and capacitance of the main circuit are selected according to actual requirements, which is not limited in this embodiment; the hub motor 2, the energy storage module 3 and the brake resistor 4 are all connected with the converter 1 in a common direct current bus topology mode, whether the connection and the electric energy circulation are determined by the on-off of corresponding switch tubes, and the on-off of the switch tubes is determined according to control signals output by the control circuit according to the control method in the embodiment. The circuit topology of fig. 3 also includes secondary sensors on the main circuit, which provide effective sampling data for the control method as the basis for the implementation of the control method.
The embodiment of the invention discloses a specific power mode control method of a super-tonnage hybrid power loader, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, the power modes of the hybrid system in this embodiment include:
a first power mode using the diesel engine as a power source;
a second power mode using the diesel engine and the energy storage battery as power sources;
a third power mode using the energy storage battery as a power energy source;
a fourth power mode in which braking energy of the loader is received by the electric traction system.
It can be understood that the selection of the power mode of the hybrid system needs to be set according to the actual working condition and the load requirement thereof.
Specifically, the work content of the loader includes a shovel work and/or a travel work.
In a first power mode, a diesel engine drives an engine to generate power, the engine generates three-phase alternating current, the three-phase alternating current is adjusted to be Variable amplitude and Variable Frequency (VFFF) three-phase alternating current through a converter to drive a hub motor, and Variable Frequency control of the hub motor is realized, and an energy storage battery does not output energy in the power mode;
in a second power mode, a diesel engine and an energy storage battery are jointly used as power sources to migrate and drive the whole vehicle to run, wherein the energy storage battery can rapidly output power to an intermediate direct-current voltage module, namely a direct-current side through a DC-DC unit so as to improve an intermediate direct-current voltage value, so that the purposes of increasing the power of an electric traction system and meeting the load fluctuation requirement are achieved, in addition, in order to protect the performance of the energy storage battery, when the electric quantity of the energy storage battery is lower than a certain value, the SOC is generally selected to be 30%, and the DC-DC unit is controlled to stop the energy storage battery from transmitting power to the direct-current side;
in a third power mode, the power source of the whole vehicle is an energy storage battery, the energy storage battery is matched with the voltage of the direct current side through the voltage rise of the DC-DC unit, the converter inverts the direct current into the alternating current to drive the hub motor to run, the power mode is generally not used as a common traction mode, namely, the power mode control method further comprises the following steps: and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is a third power mode.
The fourth power mode is also referred to as the braking mode. The whole vehicle brake is divided into electric brake and mechanical brake, the electric brake is selected as the first brake of the whole vehicle, when a driver steps on an electric brake pedal, the operating state of a hub motor is changed into an engine, energy generated by the brake is fed back to a middle direct current voltage module through a converter, the brake energy is divided into two parts, one part is recovered to an energy storage battery, the other part is consumed through a brake resistor, and the specific cooperative distribution principle comprises the following steps: on the premise of meeting the requirements of the dynamic response time and the braking effect of the electric brake of the whole vehicle, the energy storage battery is charged preferentially, the charging of the energy storage battery is stopped when the electric quantity of the energy storage battery rises to be full, and the braking energy is completely consumed by the braking resistor, that is, the fourth power mode specifically comprises the following steps: when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives braking energy; when the electric quantity of the energy storage battery reaches the preset electric quantity, the braking energy is received by a braking resistor in the electric traction system. Specifically, the preset electric quantity is always set to the state of charge with the SOC of 98%.
Further, the state information is specifically an intermediate direct current voltage value of the electric traction system;
correspondingly, the process of determining the power mode of the hybrid system according to the state information may specifically include:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is a first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is a second power mode;
and when the intermediate direct current voltage value is not less than the second preset value, determining that the power mode of the hybrid system is a fourth power mode.
It can be understood that, with respect to the speed regulation response speed of the diesel engine, the load fluctuation of the loader can directly affect the power demand change of the electric traction system, and the electric traction system based on the electronic speed regulation of the electric power has extremely fast response; the power of a hub motor of the electric traction system changes, the direct energy of the hub motor is from a middle direct-current voltage module, the power of a direct-current side fluctuates, the hub motor is used as a resistance-inductance load, and the current cannot change suddenly; meanwhile, a converter of the electric traction system is usually in a voltage type, and output voltage regulation is realized by regulating and controlling a switching tube. When the load is increased, the front-end diesel engine has slow response, the energy of the direct current side cannot meet the load requirement, the intermediate direct current voltage value is reduced, the diesel engine can operate according to the second power mode when the intermediate direct current voltage value is reduced to the first preset value, the operation energy storage battery increases the power of the direct current side, and the intermediate direct current voltage value is increased.
Similarly, when the load is reduced or the driver is electrically braked, the intermediate direct-current voltage value is directly increased and reaches the second preset value, the fourth power mode can be put into operation, the energy on the direct-current side is consumed, and the intermediate direct-current voltage value is reduced.
Specifically, the selection of the first preset value and the second preset value may be based on a preset voltage value and multiplied by a corresponding coefficient, where the first preset value is known to be smaller than the second preset value, so that the coefficient of the first preset value may be set to 0.9, and the coefficient of the second preset value may be set to 1.1, where the two coefficients may be designed and adjusted according to the electric traction system, and are not limited in particular.
In the embodiment, for the ultra-large tonnage hybrid power loader, the operation control method in multiple power modes is provided, so that the optimal power distribution among the diesel engine, the engine and the energy storage battery is realized, the energy utilization rate of the system is improved, and the power requirement of the loader with severe fluctuation of load can be met.
Correspondingly, the embodiment of the invention also discloses a power mode control system of the super-tonnage hybrid power loader, which is shown in fig. 4 and comprises the following components:
an obtaining module 21, configured to obtain operation content of the loader and state information of the blending system;
a mode determination module 22 for determining a power mode of the hybrid system according to the job content and/or the status information;
an action module 23 for starting the loader in the power mode;
as shown in fig. 2, the hybrid system includes:
the diesel engine 01, the generator 02 and the transfer case 03 are mounted in a coupling manner;
a hydraulic system 04 connected to the transfer case 03;
including an energy storage battery, an electric traction system 05 connected to a generator 02.
In some specific embodiments, the power modes include:
a first power mode in which the diesel engine 01 is used as a power source;
a second power mode in which the diesel engine 01 and the energy storage battery are used as power sources;
a third power mode using the energy storage battery as a power energy source;
a fourth power mode in which braking energy of the loader is received by the electric traction system 05.
In some particular embodiments, the job content includes a shovel job and/or a travel job.
In some specific embodiments, the status information is specific to an intermediate dc voltage value of the electric traction system 05;
accordingly, the process of the mode determination module 22 determining the power mode of the hybrid system based on the state information includes:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is a first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is a second power mode;
and when the intermediate direct current voltage value is not less than the second preset value, determining that the power mode of the hybrid system is a fourth power mode.
In some specific embodiments, the fourth power mode is specifically:
when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives braking energy;
when the electric quantity of the energy storage battery reaches the preset electric quantity, the braking energy is received by a braking resistor in the electric traction system 05.
In some specific embodiments, the mode determination module 22 is further configured to:
and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is a third power mode.
In some specific embodiments, the electric traction system 05 comprises:
a converter with an input end connected with the generator 02;
the wheel hub motor, the energy storage battery and the brake resistor are connected with the converter.
In some specific embodiments, the current transformer comprises: the three-phase inverter comprises a three-phase rectifier bridge, an intermediate direct-current voltage module and a plurality of three-phase inversion modules;
the input end of the three-phase rectifier bridge is connected with the generator, and the output end of the three-phase rectifier bridge is connected with the input end of the intermediate direct-current voltage module;
the input ends of the three-phase inversion modules are connected with the output end of the intermediate direct-current voltage module, and the output end of each three-phase inversion module is connected with a hub motor;
the input end of the energy storage battery and the input end of the brake resistor are connected with the output end of the middle direct-current voltage module through respective auxiliary switch tubes.
In some specific embodiments, the electric traction system 05 includes four in-wheel motors. The hybrid system disclosed by the application does not need traditional hydraulic transmission components, and the components are easy to select; meanwhile, the hybrid system has two power sources of a diesel engine and an energy storage battery, the electric traction system has the advantage of fast and flexible power output, and the whole hybrid system can select the most appropriate power mode according to the actual situation, so that the effects of high efficiency, energy conservation and fast feedback are realized.
Finally, it should also be noted that, herein, 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 method and the system for controlling the power mode of the ultra-large tonnage hybrid power loader are described in detail, a specific example is applied to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (18)

1. A power mode control method of an ultra-large tonnage hybrid power loader is characterized by comprising the following steps:
acquiring the operation content of the loader and the state information of the hybrid system;
determining a power mode of the hybrid system according to the operation content and/or the state information;
starting the loader in the power mode;
wherein, the thoughtlessly moving system includes:
the diesel engine, the generator and the transfer case are mounted in a coupling manner;
a hydraulic system connected with the transfer case;
the system comprises an energy storage battery and an electric traction system connected with the generator.
2. The power mode control method according to claim 1, characterized in that the power mode includes:
a first power mode using the diesel engine as a power energy source;
a second power mode using the diesel engine and the energy storage battery as power sources;
a third power mode using the energy storage battery as a power source;
a fourth power mode in which braking energy of the loader is received by the electric traction system.
3. The power mode control method according to claim 2, characterized in that the work content includes a shovel work and/or a travel work.
4. A power mode control method according to claim 3, characterized in that the status information is in particular an intermediate dc voltage value of the electric traction system;
correspondingly, the process of determining the power mode of the hybrid system according to the state information includes:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is the first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is the second power mode;
and when the intermediate direct-current voltage value is not smaller than the second preset value, determining that the power mode of the hybrid system is the fourth power mode.
5. The power mode control method according to claim 4, characterized in that the fourth power mode is specifically:
when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives the braking energy;
and when the electric quantity of the energy storage battery reaches the preset electric quantity, receiving the braking energy by a braking resistor in the electric traction system.
6. The power mode control method according to claim 2, characterized by further comprising:
and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is the third power mode.
7. The power control method according to any one of claims 1 to 6, wherein the electric traction system includes:
the input end of the converter is connected with the generator;
the hub motor, the energy storage battery and the brake resistor are connected with the converter.
8. The power control method according to claim 7, wherein the converter comprises: the three-phase inverter comprises a three-phase rectifier bridge, an intermediate direct-current voltage module and a plurality of three-phase inversion modules;
the input end of the three-phase rectifier bridge is connected with the generator, and the output end of the three-phase rectifier bridge is connected with the input end of the intermediate direct-current voltage module;
the input ends of the three-phase inversion modules are connected with the output end of the intermediate direct-current voltage module, and the output end of each three-phase inversion module is connected with one hub motor;
the input end of the energy storage battery and the input end of the brake resistor are connected with the output end of the middle direct-current voltage module through respective auxiliary switch tubes.
9. The power control method of claim 8, wherein the electric traction system includes four of the in-wheel motors.
10. A power mode control system of a super-tonnage hybrid power loader is characterized by comprising:
the acquisition module is used for acquiring the operation content of the loader and the state information of the hybrid system;
the mode determining module is used for determining a power mode of the hybrid system according to the operation content and/or the state information;
an action module for starting the loader in the power mode;
wherein, the thoughtlessly moving system includes:
the diesel engine, the generator and the transfer case are mounted in a coupling manner;
a hydraulic system connected with the transfer case;
the system comprises an energy storage battery and an electric traction system connected with the generator.
11. The power mode control system of claim 10, wherein the power mode comprises:
a first power mode using the diesel engine as a power energy source;
a second power mode using the diesel engine and the energy storage battery as power sources;
a third power mode using the energy storage battery as a power source;
a fourth power mode in which braking energy of the loader is received by the electric traction system.
12. The power mode control system of claim 11, wherein the job content includes a shovel job and/or a travel job.
13. The power mode control system of claim 12, wherein the status information is in particular an intermediate dc voltage value of the electric traction system;
correspondingly, the process of determining the power mode of the hybrid system by the mode determination module according to the state information includes:
when the intermediate direct-current voltage value exceeds a first preset value and is smaller than a second preset value, determining that the power mode of the hybrid system is the first power mode;
when the intermediate direct-current voltage value is not larger than the first preset value, determining that the power mode of the hybrid system is the second power mode;
and when the intermediate direct-current voltage value is not smaller than the second preset value, determining that the power mode of the hybrid system is the fourth power mode.
14. A power mode control system according to claim 13, characterized in that the fourth power mode is in particular:
when the electric quantity of the energy storage battery does not reach the preset electric quantity, the energy storage battery receives the braking energy;
and when the electric quantity of the energy storage battery reaches the preset electric quantity, receiving the braking energy by a braking resistor in the electric traction system.
15. The power mode control system of claim 11, wherein the mode determination module is further configured to:
and when the loader is in a special working condition or an emergency state, determining that the power mode of the hybrid system is the third power mode.
16. A power control system according to any of claims 10 to 15, wherein the electric traction system comprises:
the input end of the converter is connected with the generator;
the hub motor, the energy storage battery and the brake resistor are connected with the converter.
17. The power control system of claim 16, wherein the converter comprises: the three-phase inverter comprises a three-phase rectifier bridge, an intermediate direct-current voltage module and a plurality of three-phase inversion modules;
the input end of the three-phase rectifier bridge is connected with the generator, and the output end of the three-phase rectifier bridge is connected with the input end of the intermediate direct-current voltage module;
the input ends of the three-phase inversion modules are connected with the output end of the intermediate direct-current voltage module, and the output end of each three-phase inversion module is connected with one hub motor;
the input end of the energy storage battery and the input end of the brake resistor are connected with the output end of the middle direct-current voltage module through respective auxiliary switch tubes.
18. The power control system of claim 17, wherein the electric traction system includes four of the in-wheel motors.
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CN206653918U (en) * 2017-04-28 2017-11-21 四川国创成电池材料有限公司 A kind of hybrid power loads power plants and corresponding loading machine
CN111391644A (en) * 2020-04-22 2020-07-10 江苏赛麟汽车科技有限公司 Control method of plug-in hybrid power system

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CN201985600U (en) * 2011-02-24 2011-09-21 上海瑞伯德智能系统科技有限公司 Traction frequency converter circuit with charging function in electric vehicle
CN102651631A (en) * 2011-02-24 2012-08-29 上海瑞伯德智能系统科技有限公司 Traction frequency converter circuit with charging function for electric vehicle
CN202115328U (en) * 2011-05-16 2012-01-18 株洲南车时代电气股份有限公司 Power source suitable for supplying power for auxiliary drive device of hybrid locomotive
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