Electrically driven motor grader power output control method and system and electrically driven motor grader

Abstract

This invention belongs to the general hydraulic technology field, specifically relating to a power output control method, system, and electric motor grader for electric motor graders. The power output control method for electric motor graders includes: a motor controller controlling the motor to drive a variable pump at a base speed after power-on; the motor controller adjusting the motor speed according to the control signal received; a multi-way valve controller adjusting the corresponding valve core in the electro-proportional multi-way valve according to the control signal received; and the variable pump adjusting its displacement according to the oil pressure signal fed back by the multi-way valve controller. This invention achieves dual regulation of the motor and variable pump. Even if the volumetric efficiency of the variable pump decreases, it can compensate by adjusting to a larger displacement, without affecting the operation of the actuator. Furthermore, when the control mechanism is not in operation, the displacement of the variable pump is almost zero, resulting in no power loss and significant energy-saving effects.

Description

Technical Field

[0001] This invention belongs to the general hydraulic technology field, specifically relating to fluid pressure actuators, and more particularly to a power output control method, system, and electric motor grader for electric motor graders. Background Technology

[0002] Pure electric drive graders are widely used. Currently, pure electric graders on the market all use a motor combined with a fixed displacement pump as the power output of the hydraulic system. This power output needs to be preset according to the movement range of the operating mechanism. However, when the volumetric efficiency of the fixed displacement pump decreases, the output flow and pressure will decrease, resulting in slow operation of the actuator and reduced work efficiency.

[0003] Therefore, there is an urgent need to develop a new power output control method, system, and electric motor grader to solve the technical problems of slow actuator operation and reduced working efficiency in existing pure electric motors due to the decrease in the volumetric efficiency of the metering pump.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one power output control method, system, and electric motor grader for an electric motor grader.

[0006] In a first aspect, embodiments of this disclosure provide a power output control method for an electrically driven grader, comprising: a control mechanism sending control signals to a motor controller and a multi-way valve controller respectively; the motor controller controlling the motor to drive a variable pump at a base speed after power-on, and adjusting the motor speed according to the control signal after receiving the control signal; the multi-way valve controller adjusting the corresponding valve core in the electro-proportional multi-way valve to reverse the direction of the control signal after receiving the control signal, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeding back the corresponding oil pressure signal to the variable pump in real time; the variable pump adjusting the corresponding displacement according to the oil pressure signal fed back by the multi-way valve controller; and each actuator obtaining high-pressure oil to realize power output.

[0007] In one alternative implementation, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller is a single actuator action, the motor controller and the multi-way valve controller enter the first drive mode.

[0008] In one optional implementation, after the motor controller enters the first drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the first set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 50ms to 100ms; after the multi-way valve controller enters the first drive mode, the multi-way valve controller controls the corresponding valve core in the electro-proportional multi-way valve to switch.

[0009] In one optional implementation, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller causes at least two actuators to operate, the motor controller and the multi-way valve controller enter the second drive mode.

[0010] In one optional implementation, after the motor controller enters the second drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the second set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 80ms to 120ms; after the multi-way valve controller enters the second drive mode, the multi-way valve controller controls at least two corresponding valve cores in the electro-proportional multi-way valve to switch directions.

[0011] In one optional implementation, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller is to stop the operation of each actuator, the motor controller and the multi-way valve controller enter the stop drive mode.

[0012] In one optional implementation, after the motor controller enters the stop drive mode, the motor controller controls the motor to maintain the current speed for 3 seconds and then reduce it to the base speed; after the multi-way valve controller enters the stop drive mode, the multi-way valve controller controls the corresponding valve cores in the electro-proportional multi-way valve to return to the neutral position.

[0013] Secondly, this disclosure also provides a power output control system, comprising: an operating mechanism, a motor controller, a multi-way valve controller, a variable pump, and several actuators; wherein the operating mechanism sends operating signals to the motor controller and the multi-way valve controller respectively; after power-on, the motor controller controls the motor to drive the variable pump at a base speed, and after receiving the operating signal, the motor controller adjusts the motor speed according to the operating signal; after receiving the operating signal, the multi-way valve controller adjusts the corresponding valve core in the electro-proportional multi-way valve to switch direction according to the operating signal, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeds back the corresponding oil pressure signal to the variable pump in real time; the variable pump adjusts the corresponding displacement according to the oil pressure signal fed back by the multi-way valve controller; and each actuator obtains high-pressure oil to realize power output.

[0014] Thirdly, embodiments of this disclosure also provide an electrically driven grader for use in the power output control system described above.

[0015] Fourthly, embodiments of this disclosure also provide a non-transitory readable storage medium storing a program / instruction thereon, which, when executed by a processor, implements the steps of the power output control method for an electrically driven grader described above.

[0016] Fifthly, embodiments of this disclosure also provide a computer program product, including a computer program / instructions, characterized in that, when the computer program / instructions are executed by a processor, they implement the steps of the above-described power output control method for an electrically driven grader.

[0017] The beneficial effects of this invention are that it uses a motor combined with a variable pump as the power output for each actuator. At the same time, the speed of the motor output increases with the increase of the movement amplitude of the control mechanism, and the displacement of the variable pump is automatically adjusted according to the feedback of the oil pressure signal from the electro-proportional multi-way valve, forming a dual regulation of the motor and the variable pump. Even if the volumetric efficiency of the variable pump decreases, it can adjust to a larger displacement to compensate, without affecting the operation of the actuator. In addition, when the control mechanism is not in operation, the displacement of the variable pump is almost zero, with no power loss and significant energy saving effect.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A flowchart illustrating a power output control method for an electrically driven grader provided in this embodiment of the disclosure;

[0022] Figure 2 This is a schematic block diagram of a power output control system provided in an embodiment of the present disclosure. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0025] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0026] Research has found that pure electric drive graders are widely used. Currently, pure electric graders on the market all use a motor combined with a fixed displacement pump as the power output of the hydraulic system. This power output needs to be preset according to the movement range of the operating mechanism. However, when the volumetric efficiency of the fixed displacement pump decreases, the output flow and pressure will decrease, resulting in slow operation of the actuator and reduced work efficiency.

[0027] Based on the above research, this disclosure provides a power output control method, system and electric motor grader for electric motor graders, forming a dual regulation of motor and variable pump. Even if the volumetric efficiency of the variable pump decreases, it can adjust to a larger displacement to compensate, without affecting the operation of the actuator. In addition, when the operating mechanism is not in operation, the displacement of the variable pump is almost zero, with no power loss and significant energy saving effect.

[0028] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as the inventor's contribution to this disclosure.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] like Figures 1 to 2 As shown, at least one embodiment provides a power output control method for an electrically driven grader, comprising: a control mechanism sending control signals to a motor controller and a multi-way valve controller respectively; the motor controller controlling the motor to drive the variable pump at a base speed after power-on, and adjusting the motor speed according to the control signal after receiving the control signal; the multi-way valve controller adjusting the corresponding valve core in the electro-proportional multi-way valve to switch direction according to the control signal after receiving the control signal, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeding back the corresponding oil pressure signal to the variable pump in real time; the variable pump adjusting the corresponding displacement according to the oil pressure signal fed back by the multi-way valve controller; and each actuator obtaining high-pressure oil to realize power output.

[0032] Specifically, the base speed can be set to 700 r / min.

[0033] The above parameter settings can be adjusted according to the actual situation; this case is only used as an example.

[0034] Specifically, when a high-voltage power-on signal is received, the motor runs at its base speed, the control mechanism does not move, and the variable pump operates at its minimum displacement (almost zero). At this time, the hydraulic system has almost no power loss.

[0035] Specifically, upon receiving a high-voltage power-on signal, the motor operates at its base speed, the control mechanism activates, and sends a corresponding control signal to the motor controller. The motor controller then drives the motor to adjust its speed via a PWM signal, proportionally increasing the motor speed. The control mechanism's stroke ranges from 0 to 100%, corresponding to the motor speed increasing from the base speed to the maximum speed (the maximum speed varies depending on the mode). Simultaneously, the control mechanism also sends a corresponding control signal to the multi-way valve controller, which in turn sends a corresponding signal to the electro-proportional multi-way valve. The electro-proportional multi-way valve spool reverses, allowing the high-pressure oil output from the variable pump to enter the actuator through the electro-proportional multi-way valve. The actuator then begins to operate. During this process, the variable pump continuously receives oil pressure signals from the electro-proportional multi-way valve for variable displacement control. When the control mechanism stops and returns to the neutral position, the motor controller and the multi-way valve controller send corresponding signals to the motor and the electro-proportional multi-way valve, respectively. The motor then operates at its base speed, and the variable pump adjusts its displacement to the minimum displacement.

[0036] In at least one embodiment, a motor combined with a variable pump is used as the power output for each actuator. The motor output speed increases as the movement amplitude of the control mechanism increases. The displacement of the variable pump is automatically adjusted according to the feedback of the oil pressure signal from the electro-proportional multi-way valve, forming a dual regulation of the motor and the variable pump. Even if the volumetric efficiency of the variable pump decreases, it can adjust to a larger displacement to compensate, without affecting the operation of the actuator. In addition, when the control mechanism is not in operation, the displacement of the variable pump is almost zero, with no power loss and significant energy saving effect.

[0037] In at least one embodiment, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller is a single actuator action, the motor controller and the multi-way valve controller enter the first drive mode.

[0038] In at least one embodiment, after the motor controller enters the first drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the first set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 50ms to 100ms; after the multi-way valve controller enters the first drive mode, the multi-way valve controller controls the corresponding valve core in the electro-proportional multi-way valve to switch.

[0039] Specifically, the first set rotation speed can be set to 1000 r / min.

[0040] The above parameter settings can be adjusted according to the actual situation; this case is only used as an example.

[0041] Specifically, when the operating mechanism outputs a single actuator action, the operating mechanism sends a corresponding signal to the motor controller, which then sends a corresponding signal to the motor. The motor speed increases from the base speed to the speed corresponding to the operating mechanism. In this mode, the maximum motor speed is the first set rotational speed, and this process takes 50ms-100ms. At the same time, the operating mechanism also sends a corresponding signal to the multi-way valve controller, which then sends a corresponding signal to a specific link of the electro-proportional multi-way valve. The valve core of the corresponding link is switched, and the high-pressure oil output by the variable pump enters the actuator through the electro-proportional multi-way valve. The actuator begins to move. During this process, the variable pump constantly receives the oil pressure signal fed back by the electro-proportional multi-way valve to perform variable displacement control, ensuring the actuator's operating speed.

[0042] In at least one embodiment, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller causes at least two actuators to operate, the motor controller and the multi-way valve controller enter the second drive mode.

[0043] In at least one embodiment, after the motor controller enters the second drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the second set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 80ms to 120ms; after the multi-way valve controller enters the second drive mode, the multi-way valve controller controls at least two corresponding valve cores in the electro-proportional multi-way valve to switch directions.

[0044] Specifically, the second set rotation speed can be set to 2000 r / min.

[0045] The above parameter settings can be adjusted according to the actual situation; this case is only used as an example.

[0046] Specifically, when the operating mechanism outputs multiple actuator actions, the operating mechanism sends corresponding signals to the motor controller, which in turn sends corresponding signals to the motor. The motor speed increases from the base speed to the speed corresponding to the operating mechanism. In this mode, the maximum motor speed is the second set rotational speed, and this process takes 80ms-120ms. At the same time, the operating mechanism also sends corresponding signals to the multi-way valve controller, which in turn sends corresponding signals to certain sections of the electro-proportional multi-way valve. The valve cores of the corresponding sections are reversed, and the high-pressure oil output by the variable pump enters the actuator through the electro-proportional multi-way valve. The actuator begins to operate. During this process, the variable pump constantly receives the oil pressure signal fed back by the electro-proportional multi-way valve to perform variable displacement control and ensure the operating speed of the actuator.

[0047] In at least one embodiment, when the control signal output by the control mechanism to the motor controller and the multi-way valve controller is to stop the operation of each actuator, the motor controller and the multi-way valve controller enter the stop drive mode.

[0048] In at least one embodiment, after the motor controller enters the stop drive mode, the motor controller controls the motor to maintain the current speed for 3 seconds and then reduce it to the base speed; after the multi-way valve controller enters the stop drive mode, the multi-way valve controller controls the corresponding valve cores in the electro-proportional multi-way valve to return to the neutral position.

[0049] Specifically, after the operating mechanism stops moving and returns to the neutral position, the motor controller sends a corresponding signal to the motor, which maintains the current motor speed for 3 seconds before reducing the speed to the base speed. At the same time, the multi-way valve controller sends a corresponding signal to the electro-proportional multi-way valve, and the corresponding valve core of the electro-proportional multi-way valve immediately returns to the neutral position. Consequently, the variable pump adjusts its displacement to the minimum displacement.

[0050] Based on the same technological concept, such as Figures 1 to 2 As shown, at least one embodiment also provides a power output control system, which includes: an operating mechanism, a motor controller, a multi-way valve controller, a variable pump, and several actuators; wherein the operating mechanism sends operating signals to the motor controller and the multi-way valve controller respectively; after being powered on, the motor controller controls the motor to drive the variable pump at a base speed, and after receiving the operating signal, the motor controller adjusts the motor speed according to the operating signal; after receiving the operating signal, the multi-way valve controller adjusts the corresponding valve core in the electro-proportional multi-way valve to switch direction according to the operating signal, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeds back the corresponding oil pressure signal to the variable pump in real time; the variable pump adjusts the corresponding displacement according to the oil pressure signal fed back by the multi-way valve controller; and each actuator obtains high-pressure oil to realize power output.

[0051] Based on the same technical concept, at least one embodiment also provides an electrically driven grader for use in the power output control system as described above.

[0052] Based on the same technical concept, at least one embodiment also provides a non-transitory readable storage medium storing a program / instruction that, when executed by a processor, implements the steps of the power output control method for an electrically driven grader described above.

[0053] Based on the same technical concept, at least one embodiment also provides a computer program product, including a computer program / instructions, characterized in that, when the computer program / instructions are executed by a processor, they implement the steps of the above-described power output control method for an electric motor grader.

[0054] In summary, this invention uses a motor combined with a variable displacement pump as the power output for each actuator. The motor's output speed increases with the amplitude of the control mechanism's movement, while the variable displacement pump's displacement is automatically adjusted based on the hydraulic pressure signal feedback from the electro-proportional multi-way valve. This dual regulation by the motor and variable displacement pump ensures that even if the variable displacement pump's volumetric efficiency decreases, it can compensate by adjusting to a larger displacement, without affecting the actuator's operation. Furthermore, when the control mechanism is not in operation, the variable displacement pump's displacement is almost zero, resulting in no power loss and significant energy savings. This invention alleviates the problem of decreased actuator operating speed caused by reduced variable displacement pump volumetric efficiency and extends the service life of the hydraulic system.

[0055] The disclosures and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or combinations thereof. The disclosures and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a tangible and non-volatile computer-readable medium for execution by a data processing apparatus or for controlling the operation of the data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a material composition that influences machine-readable propagated signals, or one or more of these. The terms "data processing unit" or "data processing apparatus" include all means, devices, and machines for processing data, including, for example, programmable processors, computers, or multiprocessors or computer groups. In addition to hardware, the apparatus may also include code that creates an execution environment for a computer program, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or combinations thereof. The propagated signals are artificially generated signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information for transmission to a suitable receiver device.

[0056] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language (including compiled or interpreted languages) and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to that program, or in multiple coordinating files (e.g., a file storing one or more modules, subroutines, or portions of code). Computer programs can be deployed and executed on one or more computers located at a single site or distributed across multiple sites interconnected by a communication network.

[0057] The processing and logic flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processing and logic flows can also be executed by special-purpose logic circuitry, and the devices can be implemented as special-purpose logic circuitry, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits).

[0058] For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, as well as any one or more of any type of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor that executes instructions and one or more storage devices that store the instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or operatively coupled to receive data from or transfer data to mass storage devices, or both. However, a computer does not necessarily have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and optical disc read-only memory (CD ROM) and digital versatile optical disc read-only memory (DVD-ROM). The processor and memory may be supplemented by dedicated logic circuitry or incorporated into dedicated logic circuitry.

[0059] While this patent document contains numerous details, it should not be construed as limiting the scope of any invention or claim, but rather as a description of features of specific embodiments of a particular invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various functions described in the context of a single embodiment may also be implemented individually in multiple embodiments, or in any suitable sub-combination. Furthermore, although the foregoing features may be described as functioning in certain combinations, or even initially claimed to be so, in certain circumstances, one or more features from a combination of claims may be removed from the combination, and a combination of claims may refer to a sub-combination or a variation of a sub-combination.

[0060] Similarly, although the operations are described in a specific order in the accompanying drawings, this should not be construed as requiring the specific order or sequence shown to perform such operations, or all the described operations, in order to obtain the desired result. Furthermore, the separation of various system components in the embodiments of this patent document should not be construed as requiring such separation in all embodiments.

[0061] Only some implementations and examples are described; other implementations, enhancements, and variations can be made based on the content described and illustrated in this patent document.

[0062] While several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The present examples are intended to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.

[0063] In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0064] Furthermore, without departing from the scope of this disclosure, the discrete or individual technologies, systems, subsystems, and methods described and illustrated in the various embodiments may be combined or integrated with other systems, modules, technologies, or methods. Other items shown or discussed as coupled may be directly connected or indirectly coupled or communicated via some interface, device, or intermediate component in an electrical, mechanical, or other manner. Those skilled in the art can identify other examples of changes, substitutions, and modifications without departing from the spirit and scope of this disclosure.

Claims

1. A power output control method for an electrically driven grader, characterized in that, include: The control mechanism sends control signals to the motor controller and the multi-way valve controller respectively; After power-on, the motor controller controls the motor to drive the variable pump at the base speed, and after receiving the control signal, the motor controller adjusts the motor speed according to the control signal. After receiving the control signal, the multi-way valve controller adjusts the corresponding valve core in the electro-proportional multi-way valve to switch directions, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeds back the corresponding oil pressure signal to the variable pump in real time. The variable displacement pump adjusts its displacement according to the oil pressure signal fed back by the multi-way valve controller; as well as After each actuator obtains the high-pressure oil, it can output power.

2. The power output control method for an electrically driven grader as described in claim 1, characterized in that, When the control signal output by the control mechanism to the motor controller and the multi-way valve controller is a single actuator action, the motor controller and the multi-way valve controller will enter the first drive mode.

3. The power output control method for an electrically driven grader as described in claim 2, characterized in that, After the motor controller enters the first drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the first set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 50ms to 100ms; After the multi-way valve controller enters the first drive mode, the multi-way valve controller controls the corresponding valve core in the electro-proportional multi-way valve to switch directions.

4. The power output control method for an electrically driven grader as described in claim 1, characterized in that, When the control signal output by the control mechanism to the motor controller and the multi-way valve controller causes at least two actuators to move, the motor controller and the multi-way valve controller will enter the second drive mode.

5. The power output control method for an electrically driven grader as described in claim 4, characterized in that, After the motor controller enters the second drive mode, the motor controller controls the motor to increase from the base speed to the speed corresponding to the control signal, and the maximum speed of the motor is not greater than the second set rotation speed, and the time for the motor to increase from the base speed to the speed corresponding to the control signal is 80ms to 120ms; After the multi-way valve controller enters the second drive mode, it controls at least two corresponding valve cores in the electro-proportional multi-way valve to switch directions.

6. The power output control method for an electrically driven grader as described in claim 1, characterized in that, When the control signal output by the control mechanism to the motor controller and the multi-way valve controller stops the operation of each actuator, the motor controller and the multi-way valve controller enter the stop drive mode.

7. The power output control method for an electrically driven grader as described in claim 6, characterized in that, After the motor controller enters the stop drive mode, the motor controller controls the motor to maintain the current speed for 3 seconds and then reduce it to the base speed; After the multi-way valve controller enters the stop drive mode, it controls the corresponding valve cores in the electro-proportional multi-way valve to return to the neutral position.

8. A power output control system, characterized in that, include: Control mechanism, motor controller, multi-way valve controller, variable pump and several actuators; in The control mechanism sends control signals to the motor controller and the multi-way valve controller respectively; After power-on, the motor controller controls the motor to drive the variable pump at the base speed, and after receiving the control signal, the motor controller adjusts the motor speed according to the control signal. After receiving the control signal, the multi-way valve controller adjusts the corresponding valve core in the electro-proportional multi-way valve to switch directions, so that the variable pump outputs high-pressure oil to the corresponding actuator through the electro-proportional multi-way valve, and the multi-way valve controller feeds back the corresponding oil pressure signal to the variable pump in real time. The variable displacement pump adjusts its displacement according to the oil pressure signal fed back by the multi-way valve controller; as well as After each actuator obtains the high-pressure oil, it can output power.

9. An electrically driven grader for use in the power output control system as described in claim 8.

10. A non-transitory readable storage medium having a program / instruction stored thereon, characterized in that, When the program / instruction is executed by the processor, it implements the steps of the power output control method for an electric motor grader as described in any one of claims 1-7.

11. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the power output control method for an electric motor grader as described in any one of claims 1-7.

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