CN111779664B - Simulation method, device and equipment for electric automobile heat management water pump - Google Patents
Simulation method, device and equipment for electric automobile heat management water pump Download PDFInfo
- Publication number
- CN111779664B CN111779664B CN202010618930.9A CN202010618930A CN111779664B CN 111779664 B CN111779664 B CN 111779664B CN 202010618930 A CN202010618930 A CN 202010618930A CN 111779664 B CN111779664 B CN 111779664B
- Authority
- CN
- China
- Prior art keywords
- water pump
- simulation
- state
- pwm waveform
- pwm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention relates to the field of test simulation, and provides a simulation method of a thermal management water pump of an electric automobile, which comprises the following steps: acquiring a signal input into the water pump, and determining that the input signal is normal; generating a corresponding PWM waveform according to the working state of the water pump selected by a user; and outputting the PWM waveform as the working state feedback of the water pump. Meanwhile, a corresponding simulation device of the electric automobile heat management water pump and corresponding equipment are also provided. The implementation mode provided by the invention avoids the problems of high energy consumption and potential safety hazard caused by adopting the physical heat management water pump for testing, and is convenient for a user to select a required working mode.
Description
Technical Field
The invention relates to the field of test simulation, in particular to a simulation method of an electric automobile heat management water pump, a simulation device of the electric automobile heat management water pump, simulation equipment of the electric automobile heat management water pump and a corresponding storage medium.
Background
For better quality assurance of the product, relevant tests of the thermal management functions and strategies are indispensable, and products that do not pass the tests cannot be counted as products. Most of the existing heat management functions of new energy vehicles are developed in VCUs (vehicle control units) and BMSs (battery management systems), when the main flow heat management (liquid cooling) function is executed, required hardware generally comprises a pump and a valve, the valve is used for changing a cooling liquid circulation path, the water pump is used for providing power for the cooling liquid circulation path, and the water pump is generally selected from an electronic water pump and has the functions of diagnosis and flow rate regulation.
At present, the mainstream of a functional test of a (battery management system) or a VCU (vehicle control unit) in a development stage is a HIL (hardware in loop test) test, that is, a hardware in loop test platform is used to simulate the environment of a vehicle, even an extreme environment which is difficult to realize under normal conditions is used to test the performance of a BMS. The electronic water pump can utilize PWM or high and low levels to send fault information when some faults occur, and when most vehicles test the functions of the heat management pump, if a method of externally connecting a real water pump is adopted, the flow rate and pump fault diagnosis are difficult to simulate for testing.
In the development stage, the external connection of a real water pump is adopted, so that the test environment is simple to build, but the functions of the existing water pump are multiple, and by taking the mainstream water pump as an example, the chip can diagnose the state of the current water pump and then transmit the state of the current water pump to an MCU (microcontroller) through PWM (pulse width modulation), and the purpose of controlling the pump can also be achieved through external PWM input. If the real pump is externally connected, the fault of the pump is very occurred, and the fault which is forcibly destroyed is incomplete and causes cost waste. The disadvantages are summarized as follows:
1) it is difficult to cause various failures and inconvenient to measure the response of the MCU under the pump failure. 2) The real pumps for each project cause cost waste. 3) Sometimes, the test pump needs to work for a long time, energy waste is caused, and meanwhile, the fire risk caused by electric shock and line heating is increased.
Disclosure of Invention
In view of the above, the present invention aims to provide a method, an apparatus, and a device for simulating a thermal management water pump of an electric vehicle, so as to at least solve the problem that a water pump entity is required in the existing test of the thermal management water pump of the electric vehicle.
In a first aspect of the present invention, a simulation method for an electric vehicle thermal management water pump is provided, where the method includes:
acquiring a signal input into the water pump, and determining that the input signal is normal; generating a corresponding PWM waveform according to the working state of the water pump selected by a user; and outputting the PWM waveform as the feedback of the working state of the water pump.
Optionally, the determining that the input signal is normal includes: determining that the working frequency of the input signal is within a preset frequency range; and determining that the duty ratio of the input signal is within a preset duty ratio range.
Optionally, the generating a corresponding PWM waveform according to the water pump operating state selected by the user includes:
calling a preset PWM waveform control parameter according to the working state of the water pump;
and generating the corresponding PWM waveform according to the control parameter.
Optionally, the generating a corresponding PWM waveform according to the water pump operating state selected by the user includes: calling a preset PWM basic waveform and a PWM step according to the working state of the water pump; and processing the PWM basic waveform through the PWM modulation step to obtain the corresponding PWM waveform, and obtaining the corresponding PWM waveform.
In a second aspect of the present invention, a simulation device for an electric vehicle thermal management water pump is provided, the simulation device comprising:
the input signal detection module is used for acquiring a signal input into the water pump and determining that the input signal is normal; the man-machine interaction module is used for acquiring the working state of the water pump selected by a user and transmitting the working state to the simulation generation module; the analog generation module is used for generating a corresponding PWM waveform according to the working state of the water pump; and the analog output module is used for outputting the PWM waveform as the working state feedback of the water pump.
Optionally, the input signal detection module includes: the frequency detection submodule is used for determining that the working frequency of the input signal is within a preset frequency range; and the duty ratio detection submodule is used for determining that the duty ratio of the input signal is within a preset duty ratio range.
Optionally, the simulation generating module includes: the storage submodule is used for storing PWM waveform control parameters which are in one-to-one correspondence with the working states of the water pumps; and the PWM waveform generation submodule is used for generating the corresponding PWM waveform according to the control parameter corresponding to the working state of the water pump.
Optionally, the simulation generating module includes: the state simulation submodule corresponds to the working state of the water pump one by one, and one state simulation submodule is used for outputting a PWM waveform corresponding to the working state of the water pump; the control end of the selector switch is connected with the man-machine interaction module and used for receiving the working state of the water pump transmitted from the man-machine interaction module, each input end of the plurality of input ends is connected with one state simulation submodule, and the output end of the state simulation submodule is connected with the simulation output module.
Optionally, the state simulation submodule includes: a PWM basic waveform unit for generating a continuous PWM waveform of a preset frequency; a timer and a switch for modulating a PWM waveform of a specific duty ratio based on the plurality of continuous PWM waveforms.
In a third aspect of the present invention, a simulation device for an electric vehicle thermal management water pump is provided, which includes:
at least one processor; a memory coupled to the at least one processor;
the memory stores instructions capable of being executed by the at least one processor, and the at least one processor implements the simulation method of the electric vehicle thermal management water pump by executing the instructions stored by the memory.
In a fourth aspect of the present invention, a computer-readable storage medium is further provided, where the storage medium has instructions stored therein, and when the storage medium runs on a computer, the computer is caused to execute the foregoing simulation method for the electric vehicle thermal management water pump.
Through the technical scheme provided by the invention, the following beneficial effects are achieved:
1) the test coverage rate is increased, various faults generated by the pump can be simulated, and the response of the controller is tested;
2) hardware cost of the pump is saved;
3) the energy can be saved, power does not need to be provided, and the fire risk caused by short circuit, electric shock and line body heating can be thoroughly eliminated.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic flow chart of a simulation method of a thermal management water pump of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a diagram of an implementation of a simulation method of a thermal management water pump of an electric vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a simulation device of a thermal management water pump of an electric vehicle according to an embodiment of the present invention;
FIG. 4 is a simulation diagram of a selection switch of a simulation device of a thermal management water pump of an electric vehicle according to an embodiment of the present invention;
FIG. 5 is a simulation diagram of a state simulation submodule of the simulation device of the electric vehicle thermal management water pump according to an embodiment of the invention;
fig. 6 is an overall simulation diagram of a simulation device of a thermal management water pump of an electric vehicle according to an embodiment of the present invention.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a schematic flow chart of a simulation method of a thermal management water pump of an electric vehicle according to an embodiment of the present invention, as shown in fig. 1. A simulation method of an electric vehicle thermal management water pump comprises the following steps:
acquiring a signal input into the water pump, and determining that the input signal is normal; generating a corresponding PWM waveform according to the working state of the water pump selected by a user; and outputting the PWM waveform as the working state feedback of the water pump.
Thus, under the condition of not using an actual heat management water pump, various working states of the heat management water pump can be obtained through simulation. The water pump generally adopts PWM control (high and low levels are also a type of PWM), and on the hardware level, the heat management water pump of the electric automobile is directly connected to a BMS or a VCU and is directly controlled by the BMS or the VCU, and the state interaction is carried out through a hard wire. The input of the water pump is a PWM wave, the output is also a PWM wave, the requirement on hardware testing equipment is that a PWM acquisition channel and a PWM output channel can acquire and output waveforms with different frequencies and duty ratios, and the method is easy to realize for most hardware in-the-loop equipment.
The water pump is designed according to the mode commonly used in the market at present, the input PWM of the normal work of the water pump is a range, the frequency is fixed, and the rotating speed of the pump can be controlled by adjusting the duty ratio. The water pump has a diagnosis and detection function, and when the water pump breaks down, the frequency and the duty ratio are fed back to the controller to reflect that the water pump breaks down.
Specifically, fig. 2 is a specific implementation diagram of a simulation method for a thermal management water pump of an electric vehicle according to an embodiment of the present invention, and as shown in fig. 2, a PWM wave output by a controller via a hard wire is collected through an input collection channel, so as to determine whether the PWM wave meets a pump start command. If not, the pump turn-on command is not sent, and the feedback state is off. If the abnormal state of the water pump is met, the controller is considered to have initiated a command for starting the pump, at the moment, a pump feedback mode is selected, the default state is output in a normal working state, other abnormal modes can be manually selected, output feedback is carried out, and whether the response of the controller is correct or not in the abnormal state of the water pump is tested.
In one embodiment of the present invention, the determining that the input signal is normal includes: determining that the working frequency of the input signal is within a preset frequency range; and determining that the duty ratio of the input signal is within a preset duty ratio range. The working frequency of a normal water pump of the water pump is Freq _ min-Freq _ max, and the working duty ratio is DC _ min-DC _ max. Analyzing the frequency Freq and the duty ratio DC of the PWM wave output from the controller hardwire, judging whether the conditions of Freq _ min-Freq _ max and DC _ min-DC _ max are met, if the conditions are met, outputting the state On, otherwise, outputting the state Off. The embodiment provided by the embodiment can simulate the stopping response of the water pump and the reaction of the corresponding controller under the condition that the input signal is abnormal.
After the above-mentioned working state is judged to be On again, different responses are made according to the state of the real pump to 'cheat' the controller, so that the controller outputs the result expected by the tester. Taking a water pump state of a certain brand as an example: when the water pump works normally, the water pump can feed back a normal working state, and the PWM waveform state at the moment is as follows: 100HZ, duty cycle 50% duration 4.5s, duty cycle 0% duration 0.5s, switching between the two states. Therefore, the controller can acquire the signal of normal operation of the water pump only by simulating the waveform and sending the waveform to the controller. To obtain this signal, the following different embodiments may be employed.
The generating of the corresponding PWM waveform according to the water pump working state selected by the user comprises: calling a preset PWM waveform control parameter according to the working state of the water pump; and generating the corresponding PWM waveform according to the control parameter. The prior art PWM control chip may directly use a digital programmable chip, use program control to generate PWM waveform, such as PIC16F72, or use an APC chip to perform control, such as setting several sets of control parameters, including high and low levels, frequency, pulse width and duty ratio. Each group of control parameters corresponds to a water pump working state, and a PWM output waveform is also determined. The present embodiment mainly provides a way of software controlling the PWM waveform.
Alternatively, an external modulation PWM scheme may be used. The generating of the corresponding PWM waveform according to the water pump working state selected by the user comprises: calling a preset PWM basic waveform and a PWM step according to the working state of the water pump; and after the PWM basic waveform is processed by the PWM step, the corresponding PWM waveform is obtained. For example, to generate the aforementioned PWM waveform during normal operation, two PWM basic waveforms are adopted, one is a waveform with a frequency of 100HZ and a duty ratio of 50%, and the other is a waveform with a duty ratio of 0%, and the modulation method is as follows: and controlling the waveform with the duty ratio of 50% to output for 4.5s by a timer, then outputting for 0.5s by the waveform with the duty ratio of 0%, repeating the process to obtain the PWM waveform with the duty ratio of 100HZ, the duration of 50% of the duty ratio of 4.5s and the duration of 0% of the duty ratio of 0.5s, and using the PWM waveform as the feedback of the working state of the water pump, wherein the controller judges the working state of the water pump to be normal working according to the PWM waveform.
Different state feedback of the water pump is simulated in the same way, namely different PWM waveforms are adopted. The faults of the water pump, such as dry running, locked running, over-temperature and the like, are often caused, and the faults are difficult to test by using a real water pump. The tester can simulate the signal according to the corresponding feedback information description in the concrete water pump specification. During fault simulation, the state of the pump is set through mode selection, corresponding bits are sent to select corresponding faults, for example, 0 represents normal work, 1 represents dry rotation, 2 represents locked rotation, 3 represents over-temperature and the like, states can be added according to actual needs, and each state corresponds to different PWM waveforms.
In one embodiment of the present invention, a simulation apparatus for an electric vehicle thermal management water pump includes: the input signal detection module is used for acquiring a signal input into the water pump and determining that the input signal is normal; the man-machine interaction module is used for acquiring the working state of the water pump selected by a user and transmitting the working state to the simulation generation module; the analog generation module is used for generating a corresponding PWM waveform according to the working state of the water pump; and the analog output module is used for outputting the PWM waveform as the working state feedback of the water pump. Fig. 3 is a schematic structural diagram of a simulation apparatus of an electric vehicle thermal management water pump according to an embodiment of the present invention, and as shown in fig. 3, a detection result of an input signal detection module is used to determine whether the water pump meets a working condition; the man-machine interaction module is used for inputting the required working state of the water pump by a user or directly displaying the current working state of the water pump so as to be conveniently and visually checked by the user. The simulation generation module is used for generating PWM waveforms corresponding to the water pump working state selected by the user. And the analog output module is used for outputting the PWM waveform and comprises the adaptation of a system hardware interface and the adaptation of a software interface. The modules can be virtual modules and are used for providing on-line simulation of the water pump; or may be physical modules, integrated by one skilled in the art into a physical hardware including input ports, output ports, user interaction devices, and PWM waveform control by selecting appropriate hardware.
In one embodiment of the present invention, the input signal detection module includes: the frequency detection submodule is used for determining that the working frequency of the input signal is within a preset frequency range; and the duty ratio detection submodule is used for determining that the duty ratio of the input signal is within a preset duty ratio range. When the input signal detection module works, resolving frequency Freq and duty ratio DC of the output wave from the PWM wave output by the controller hardwire, and judging whether the conditions of Freq _ min-Freq _ max and DC _ min-DC _ max are met, if the conditions are met, outputting a state On, otherwise, outputting a state Off.
In one embodiment of the present invention, the simulation generation module includes: the storage submodule is used for storing PWM waveform control parameters which are in one-to-one correspondence with the working states of the water pumps; and the PWM waveform generation submodule is used for generating the corresponding PWM waveform according to the control parameter corresponding to the working state of the water pump. The PWM waveform generation submodule comprises an existing adjustable PWM waveform generator on the market, and a user inputs control parameters to obtain PWM waveforms corresponding to the control parameters.
Fig. 4 is a simulation diagram of a selection switch of a simulation apparatus for an electric vehicle thermal management water pump according to an embodiment of the present invention, and as shown in fig. 4, the simulation generating module includes: the state simulation submodule corresponds to the working state of the water pump one by one, and one state simulation submodule is used for outputting a PWM waveform corresponding to the working state of the water pump; the control end of the selector switch is connected with the man-machine interaction module and used for receiving the working state of the water pump transmitted from the man-machine interaction module, each input end of the plurality of input ends is connected with one state simulation submodule, and the output end of the plurality of input ends is connected with the simulation output module. The Out1 and a plurality of Out2 modules on the left side in fig. 4 are the state simulation submodules, the Multiportswitch in fig. 4 is the selection switch, and one state is selected from 4 states (1 normal state and 3 fault states) from 0 to 3 through the input of the control end to be output.
On the basis of the previous embodiment, the present embodiment provides a way to construct a state simulation submodule. The state simulation submodule comprises: a PWM basic waveform unit for generating a continuous PWM waveform of a preset frequency; a timer and a switch for modulating a PWM waveform of a specific duty ratio based on the plurality of continuous PWM waveforms. Fig. 5 is a simulation diagram of a state simulation submodule of a simulation apparatus of an electric vehicle thermal management water pump according to an embodiment of the present invention, as shown in fig. 5, two PWM basic waveforms are adopted, one is a waveform with a frequency of 100HZ and a duty ratio of 50%, and the other is a waveform with a duty ratio of 0%, and a modulation method is as follows: and controlling the waveform with the duty ratio of 50% to output for 4.5s by a timer, then outputting for 0.5s by the waveform with the duty ratio of 0%, repeating the process to obtain the PWM waveform with the duty ratio of 100HZ, the duration of 50% of the duty ratio of 4.5s and the duration of 0% of the duty ratio of 0.5s, and using the PWM waveform as the feedback of the working state of the water pump, wherein the controller judges the working state of the water pump to be normal working according to the PWM waveform. In the same way, other state simulation submodules are constructed in the same way, but the output waveforms are different, namely different PWM waveforms are adopted to simulate different state feedbacks of the water pump. The faults of the water pump frequently include dry running, locked running, over-temperature and the like, a tester can obtain a corresponding PWM waveform in the fault state according to corresponding feedback information description in a concrete water pump specification, and the simulation of the PWM signal is completed through different combinations of a PWM basic waveform unit, a timer and a change-over switch.
In an embodiment provided by the present invention, there is also provided a simulation device for a thermal management water pump of an electric vehicle, including: at least one processor; a memory coupled to the at least one processor; the memory stores instructions capable of being executed by the at least one processor, and the at least one processor implements the simulation method of the electric vehicle thermal management water pump by executing the instructions stored by the memory. The control module or processor herein has the functions of numerical calculation and logical operation, and it has at least a central processing unit CPU, a random access memory RAM, a read only memory ROM, various I/O ports and interrupt systems, etc. of data processing capability. Here, the control module or the control device may be, for example, a single chip, a chip, or a processor, which is commonly used hardware, and in a more commonly used case, the control module or the control device is a processor of an intelligent terminal or a PC. Here, when the apparatus is a PC, the foregoing embodiment is a software program running on the PC. When the equipment is special electronic equipment, the functions are realized through a built-in single chip microcomputer or a PWM chip.
Fig. 6 is an overall simulation diagram of a simulation apparatus of a thermal management water pump of an electric vehicle according to an embodiment of the present invention, as shown in fig. 6, a Subsystem in fig. 6 is a simulation water pump, DC _ in and Freq _ in are inputs of the simulation water pump, and DiagMode is an input diagnostic state, and is 0 by default, where DiagMode may include the following states: 0: working normally; 1: dry-turning; 2: blocking rotation; 3: over-temperature; when the input is abnormal, the water pump does not work; when the input is normal, the water pump defaults to a normal working state and outputs a corresponding PWM waveform, and when a corresponding fault state code is input, the water pump outputs the PWM waveform corresponding to the fault, so that the simulation of the actual working state of the water pump is realized. The overall simulation diagram of the simulation device provided by the embodiment encapsulates the internal structure, so that the pins of the simulation device are simplified, and the use by a user is facilitated.
The embodiment of the invention provides a simulation method and a simulation device of an electric automobile heat management water pump, aiming at the problems that the existing electric automobile heat management water pump needs physical entities in the test process and fault simulation is not easy to carry out, and the simulation method and the simulation device can simulate various working states of the water pump under the condition of low cost and provide better substitution for the water pump in signal test.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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 the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A simulation method of an electric automobile heat management water pump is applied to the electric automobile heat management water pump, and is characterized by comprising the following steps:
acquiring a signal input into the water pump, and determining that the input signal is normal;
generating a corresponding PWM waveform according to the working state of the water pump selected by a user; the water pump operating condition includes: a normal working state, a dry-running state, a locked-running state and an over-temperature state;
outputting the PWM waveform as the working state feedback of the water pump;
the determining that the input signal is normal includes:
determining that the working frequency of the input signal is within a preset frequency range; and is
Determining that the duty ratio of the input signal is within a preset duty ratio range.
2. The method of claim 1, wherein generating the corresponding PWM waveform according to the user-selected water pump operating state comprises:
calling a preset PWM waveform control parameter according to the working state of the water pump;
and generating the corresponding PWM waveform according to the control parameter.
3. The method of claim 1, wherein generating the corresponding PWM waveform according to the user-selected water pump operating state comprises:
calling a preset PWM basic waveform and a PWM step according to the working state of the water pump;
and processing the PWM basic waveform through the PWM modulation step to obtain the corresponding PWM waveform.
4. A simulation device of an electric automobile heat management water pump is characterized by comprising:
the input signal detection module is used for acquiring a signal input into the water pump and determining that the input signal is normal;
the man-machine interaction module is used for acquiring the working state of the water pump selected by a user and transmitting the working state to the simulation generation module; the water pump operating condition includes: a normal working state, a dry-running state, a locked-running state and an over-temperature state;
the analog generation module is used for generating a corresponding PWM waveform according to the working state of the water pump; and
the analog output module is used for outputting the PWM waveform as the working state feedback of the water pump;
the input signal detection module includes:
the frequency detection submodule is used for determining that the working frequency of the input signal is within a preset frequency range; and
and the duty ratio detection submodule is used for determining that the duty ratio of the input signal is within a preset duty ratio range.
5. The simulation apparatus of claim 4, wherein the simulation generation module comprises:
the storage submodule is used for storing PWM waveform control parameters which are in one-to-one correspondence with the working states of the water pumps; and
and the PWM waveform generation submodule is used for generating the corresponding PWM waveform according to the control parameter corresponding to the working state of the water pump.
6. The simulation apparatus of claim 4, wherein the simulation generation module comprises: the device comprises a selection switch and a plurality of state simulation sub-modules;
the plurality of state simulation sub-modules correspond to the working states of the water pumps one by one, and one state simulation sub-module is used for outputting a PWM waveform corresponding to the working state of the water pump;
the control end of the selector switch is connected with the man-machine interaction module and used for receiving the working state of the water pump transmitted from the man-machine interaction module, each input end of the plurality of input ends is connected with one state simulation submodule, and the output end of the state simulation submodule is connected with the simulation output module.
7. The simulation device of claim 6, wherein the state simulation submodule comprises:
a PWM basic waveform unit for generating a continuous PWM waveform of a preset frequency;
and the timer and the change-over switch are used for modulating the PWM waveform with a specific duty ratio on the basis of the continuous PWM waveform.
8. The simulation equipment of the electric automobile heat management water pump is characterized by comprising:
at least one processor;
a memory coupled to the at least one processor;
the memory stores instructions executable by the at least one processor, and the at least one processor implements the simulation method of the electric vehicle thermal management water pump according to any one of claims 1 to 3 by executing the instructions stored in the memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618930.9A CN111779664B (en) | 2020-06-30 | 2020-06-30 | Simulation method, device and equipment for electric automobile heat management water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618930.9A CN111779664B (en) | 2020-06-30 | 2020-06-30 | Simulation method, device and equipment for electric automobile heat management water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111779664A CN111779664A (en) | 2020-10-16 |
| CN111779664B true CN111779664B (en) | 2022-06-24 |
Family
ID=72759960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010618930.9A Active CN111779664B (en) | 2020-06-30 | 2020-06-30 | Simulation method, device and equipment for electric automobile heat management water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111779664B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136672B (en) * | 2021-11-12 | 2023-06-13 | 上汽通用五菱汽车股份有限公司 | Method and device for testing heat management system of pure electric vehicle and readable storage medium |
| CN114895649A (en) * | 2022-04-23 | 2022-08-12 | 中国第一汽车股份有限公司 | Electric automobile thermal management system testing device, method and system and electronic equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206678774U (en) * | 2017-04-28 | 2017-11-28 | 安徽江淮汽车集团股份有限公司 | A kind of electronic water pump control system of pure electric vehicle |
| CN108443128B (en) * | 2018-04-23 | 2019-10-22 | 安徽航瑞航空动力装备有限公司 | A kind of control method of electric water pump |
| US20190326838A1 (en) * | 2018-04-24 | 2019-10-24 | Graco Minnesota Inc. | Pulse width modulation motor control of pressurizer pump |
| CN109932604A (en) * | 2019-04-03 | 2019-06-25 | 武汉菱电汽车电控系统股份有限公司 | Wide oxygen failure simulation method, apparatus and system |
-
2020
- 2020-06-30 CN CN202010618930.9A patent/CN111779664B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111779664A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111779664B (en) | Simulation method, device and equipment for electric automobile heat management water pump | |
| CN110799757B (en) | Fan control method, fan control device and electronic equipment | |
| CN113589787B (en) | Hardware-in-loop test method, test device, test system and readable storage medium | |
| JP2006520947A5 (en) | ||
| CN104865948A (en) | Automatic vehicle controller diagnosing device and method | |
| CN108267659A (en) | A kind of frequency converter test platform and frequency converter test method | |
| CN104321660A (en) | System and method for generating diagnostic test files associated with a battery pack | |
| CN112327082B (en) | Method, device and system for testing complete set of energy consumption device of flexible direct current engineering | |
| CN114124767A (en) | Automatic testing method and device for gateway network management strategy | |
| JP2004005658A (en) | Diagnostic method for electrical drive assembly | |
| CN112285586A (en) | BMS test method, device and system, simulation test equipment and storage medium | |
| CN113624482A (en) | Performance test method and device for water valve, electronic equipment and storage medium | |
| CN105365579A (en) | Power system, safety measuring method and device thereof and electric vehicle | |
| CN115993812A (en) | Whole vehicle fault diagnosis test method, device, system, equipment and medium | |
| CN114895649A (en) | Electric automobile thermal management system testing device, method and system and electronic equipment | |
| CN116053654A (en) | Method and device for determining pulse heating parameters, electronic equipment and storage medium | |
| CN213302852U (en) | Test system of controller | |
| CN114966384A (en) | Relay durability test method, device, equipment and storage medium | |
| CN101278473A (en) | Control and diagnostics of power delivery system | |
| CN109945396B (en) | Air conditioner, and detection method and detection device for driving circuit fault | |
| CN113608092A (en) | Double-pulse test system | |
| CN208013324U (en) | A kind of frequency converter test platform | |
| CN113886274A (en) | Stability testing method, device, equipment and storage medium for Internet of vehicles terminal | |
| CN112925285A (en) | Endurance test system and method for electronic controller | |
| CN109490662A (en) | Test method, device, computer equipment and the storage medium of vehicle electronics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |