CN110632516B - Temperature control method and device for butt-supporting experiment bench - Google Patents
Temperature control method and device for butt-supporting experiment bench Download PDFInfo
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- CN110632516B CN110632516B CN201911043437.2A CN201911043437A CN110632516B CN 110632516 B CN110632516 B CN 110632516B CN 201911043437 A CN201911043437 A CN 201911043437A CN 110632516 B CN110632516 B CN 110632516B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
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Abstract
The invention provides a temperature control method for a butt-supported experiment bench, which comprises a heat dissipation device for dissipating heat of a tested motor, wherein the heat dissipation device comprises a water-cooling pipeline and a condenser for refrigerating liquid in the water-cooling pipeline, and the water-cooling pipeline is in contact with the tested motor to dissipate heat of the tested motor, and is characterized in that the temperature control method comprises the following steps: acquiring the temperature change rate of a working environment and the temperature change rate of liquid in the water cooling pipeline; calculating the effective temperature change rate of the heat dissipation device based on the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; and determining the refrigeration power of the condenser based on the effective temperature change rate.
Description
Technical Field
The invention relates to the field of motor control, in particular to a control method and a control device for a butt-support experiment bench.
Background
The butt-bearing test is a method of a motor test, during the test, two motors with similar power are coaxially connected so as to test the load characteristic of the tested motor, and the specific test method may have some differences based on different motors.
The butt-supporting experiment bench is a platform for performing quick and accurate butt-supporting experiments on the motor. In the process of carrying out the butt-supporting experiment on the tested motor, particularly the test experiment of the high-power permanent magnet synchronous motor on the butt-supporting experiment bench, a large amount of heat can be generated.
In the prior art, in order to prevent heat generated by a tested motor from influencing the health conditions of the tested motor and a support experiment bench, a heat dissipation device with constant high power is adopted to dissipate heat of the support experiment bench and the tested motor; or a simple water-cooling heat dissipation device is adopted to dissipate heat of the butt-supporting experiment bench and the tested motor. However, the heat dissipation device with constant high power dissipates heat of the butt-supporting experiment bench and the tested motor with constant high power no matter how fast the heat production quantity of the tested motor is, which causes waste of resources. The simple water-cooling heat dissipation device cannot meet the heat dissipation requirement of the tested motor, and the accuracy of debugging experimental data of the tested motor is influenced.
The invention aims to provide a temperature control method and a temperature control device for a butt-support experiment bench, aiming at solving the problem that the heat production quantity of a heat dissipation device and a tested motor is not matched in the prior art.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of the present invention, there is provided a temperature control method for a butt-joint experiment bench, the butt-joint experiment bench including a heat dissipation device for dissipating heat of a motor to be tested, the heat dissipation device including a water-cooled pipe and a condenser for cooling liquid in the water-cooled pipe, the water-cooled pipe being in contact with the motor to be tested to dissipate heat of the motor to be tested, the temperature control method including:
acquiring the temperature change rate of a working environment and the temperature change rate of liquid in the water cooling pipeline; calculating the effective temperature change rate of the heat dissipation device based on the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; and determining the refrigeration power of the condenser based on the effective temperature change rate.
Further, the calculating the effective temperature change rate of the heat dissipation device based on the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline comprises:
substituting the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline into a calculation formula W (a) delta T of the effective temperature change rate1+b*ΔT2Calculating the effective temperature change rate, wherein W is the effective temperature change rate, and delta T1Is the rate of change of temperature, Δ T, of the working environment2And the weight coefficient is the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
Furthermore, the weight coefficient of the temperature change rate of the working environment is 60%, and the weight coefficient of the temperature change rate of the liquid in the water-cooling pipeline is 40%.
Further, the calculating the effective temperature change rate of the heat dissipation device based on the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline further comprises:
calculating effective values of the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; substituting the effective value of the working environment temperature change rate and the effective value of the liquid temperature change rate in the water cooling pipeline into a calculation formula W of the effective temperature change rate1+b*ΔT2Calculating the effective temperature change rate, wherein W is the effective temperature change rate, and delta T1Effective value of the rate of change of temperature of the working environment, Δ T2And a is the effective value of the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
Further, the calculating effective values of the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline comprises:
in response to the operating environment temperature change rate being greater than a maximum change threshold, setting the maximum change threshold to a valid value of the operating environment temperature change rate; or responding to the working environment temperature change rate being less than or equal to the maximum change threshold value, and setting the working environment temperature change rate as an effective value of the working environment temperature change rate; and
responding to the fact that the liquid temperature change rate in the water-cooling pipeline is larger than the maximum change threshold value, and setting the maximum change threshold value as an effective value of the liquid temperature change rate in the water-cooling pipeline; or responding to the liquid temperature change rate in the water-cooling pipeline being less than or equal to the maximum change threshold value, and setting the liquid temperature change rate in the water-cooling pipeline as the effective value of the liquid temperature change rate in the water-cooling pipeline.
Still further, the determining the refrigeration power of the condenser based on the effective temperature change rate includes:
controlling the condenser to operate at a first refrigeration power in response to the effective temperature change rate being less than a first preset threshold; controlling the condenser to operate at a second refrigeration power in response to the effective temperature change rate being greater than the first preset threshold and less than a second preset threshold; and responding to the effective temperature change rate being larger than the second preset threshold value, controlling the condenser to operate at a third refrigerating power, wherein the first refrigerating power is smaller than the second refrigerating power, and the second refrigerating power is smaller than the third refrigerating power.
Further, the acquiring the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline comprises: acquiring the temperature of a working environment and the temperature of liquid at a water outlet of the water cooling pipeline; and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
Further, the calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline respectively based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline further includes:
and responding to the fact that the working environment temperature is larger than a refrigeration starting temperature threshold value, and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
Still further, the temperature control method further includes:
setting a defined working time of the refrigeration power based on the refrigeration power of the condenser; and in response to the time that the condenser is operated at the current cooling power reaching the limited working time of the current cooling power, re-determining the cooling power of the condenser based on the current effective temperature change rate.
According to another aspect of the present invention, there is provided a temperature control device for a butt-held experiment bench, the butt-held experiment bench comprising a heat dissipation device for dissipating heat of a tested motor, the heat dissipation device comprising a water-cooled pipe and a condenser for dissipating heat of liquid in the water-cooled pipe, the water-cooled pipe being in contact with the tested motor for dissipating heat of the tested motor, the temperature control device comprising a memory and a processor, the processor being configured to implement the steps of the temperature control method according to any one of the above items when executed.
According to another aspect of the invention, the butt-holding experiment bench comprises a heat dissipation device for dissipating heat of a tested motor, the heat dissipation device comprises a water-cooling pipeline and a condenser for dissipating heat of liquid in the water-cooling pipeline, the water-cooling pipeline is in contact with the tested motor to dissipate heat of the tested motor, and the butt-holding experiment bench further comprises the temperature control device.
According to a further aspect of the present invention, there is provided a computer storage medium having a computer program stored thereon, the computer program when executed implementing the steps of the temperature control method according to any one of the preceding claims.
Drawings
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings.
FIG. 1 is a schematic flow chart of a temperature control method in one embodiment according to one aspect of the present invention;
FIG. 2 is a partial flow diagram of a temperature control method in one embodiment according to one aspect of the present invention;
FIG. 3 is a partial flow diagram of a temperature control method in one embodiment according to one aspect of the present invention;
FIG. 4 is a partial flow diagram of a temperature control method in one embodiment according to one aspect of the present invention;
FIG. 5 is a partial flow diagram of a temperature control method in one embodiment according to one aspect of the present invention;
FIG. 6 is a block diagram of a temperature control device in one embodiment according to another aspect of the present invention;
FIG. 7 is a schematic view of a butt bench in one embodiment according to yet another aspect of the present invention.
Detailed Description
The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
Note that where used, the designations left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, where used, further, preferably, still further and more preferably is a brief introduction to the exposition of the alternative embodiment on the basis of the preceding embodiment, the contents of the further, preferably, still further or more preferably back band being combined with the preceding embodiment as a complete constituent of the alternative embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
According to one aspect of the present invention, a method of temperature control of a denture experiment table is provided. The butt-support experiment bench is an experiment bench comprising a heat dissipation device with adjustable heat dissipation power. The heat dissipation device with adjustable heat dissipation power can be a condenser which comprises a water cooling pipeline and is used for refrigerating liquid in the water cooling pipeline. The low-temperature liquid refrigerated by the condenser circulates in the water-cooling pipeline, and the low-temperature liquid in the water-cooling pipeline exchanges heat with the tested motor to dissipate heat of the tested motor at the position where the water-cooling pipeline is contacted with the tested motor. The temperature control method of the invention mainly controls the heat dissipation power of the heat dissipation device by controlling the refrigeration power of the condenser in the heat dissipation device.
In one embodiment, as illustrated in FIG. 1, a method 100 for controlling temperature of a remote laboratory bench includes steps S110-S130.
Wherein, step S110 is: and acquiring the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline.
The operating ambient temperature refers to the ambient temperature at which the device or apparatus used to perform the temperature control method 100 is located. The working environment temperature change rate is the change difference of the environment temperature in unit time.
The liquid temperature in the water-cooling pipeline refers to the liquid temperature at the water outlet of the water-cooling pipeline, namely the liquid temperature after heat exchange with the tested motor is completed. The liquid temperature change rate in the water-cooling pipeline refers to the water temperature change difference at the water outlet of the water-cooling pipeline in unit time.
The "acquiring" may be receiving temperature data detected in a unit time interval thereof from a temperature sensor device for detecting the ambient temperature and the liquid temperature, or may mean receiving calculated change rate data thereof from a calculation module for calculating a change rate of the temperature of the working environment and a calculation module for calculating a change rate of the temperature of the water temperature.
Further, as shown in fig. 2, step S110 may specifically include steps S111 to S112.
Step S111 is: and acquiring the temperature of the working environment and the temperature of the liquid at the water outlet of the water cooling pipeline.
The temperature of the working environment is detected by a temperature sensor which is arranged in a device or equipment for executing the temperature control method and is close to a PCB control panel, and the temperature of the liquid at the water outlet of the water cooling pipeline is detected by a temperature sensor which is arranged at the water outlet of the water cooling pipeline.
Step S112 is: and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
And respectively calculating the working environment temperature change rate in a period of time and the liquid temperature change rate in the water cooling pipeline based on the detection frequency or detection time interval of the temperature sensor for detecting the working environment temperature and the temperature sensor for detecting the liquid temperature in the water cooling pipeline.
Preferably, in order to further improve the energy-saving performance of the heat dissipation device, the condenser can be opened when the condenser needs to be opened, and the condenser is closed when the tested motor does not need to perform high-speed heat dissipation, and only heat is dissipated through circulating liquid in the water cooling pipeline.
Correspondingly, step S112 is further configured to: and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline in response to the working environment temperature being greater than a preset refrigeration starting temperature threshold value.
Step S120 is: and calculating the effective temperature change rate of the heat dissipation device based on the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline.
The effective temperature is an index which can be used for measuring the temperature of the tested motor, the change rate of the effective temperature can indicate the heat production quantity of the tested motor, and the heat production quantity of the tested motor is a reference for selecting proper heat dissipation power by the heat dissipation device.
Step S130 is: and determining the refrigeration power of the condenser based on the effective temperature change rate.
It will be appreciated that the effective rate of change of temperature may be indicative of the heat production of the motor under test, with the higher the heat production of the motor under test, the greater the cooling power required to the condenser.
Further, the weight coefficients occupied by the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline in the calculation method of the effective temperature change rate can be set based on the correlation degree of the working environment temperature change rate and the heat production amount of the motor to be measured and the correlation degree of the liquid temperature change rate in the water cooling pipeline and the heat production amount of the motor to be measured.
Specifically, a simulation experiment of the simulation test of the Matlab tool can be used for determining the calculation formula of the effective temperature change rate.
In general, the effective rate of temperature change can be expressed using the following equation:
W＝a*ΔT1+b*ΔT2 (1)
wherein W is the effective temperature change rate, Δ T1Is the rate of change of temperature, Δ T, of the working environment2The weight coefficient is the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
Step S120 may be correspondingly set as: and (4) substituting the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline obtained in the step (S110) into the formula (1) to calculate the effective temperature change rate.
It can be understood that the weight coefficients of different working environment temperature change rates and the weight coefficients of different liquid temperature change rates in the water cooling pipelines can indicate effective temperature change rates to different degrees. Through simulation calculation, the optimal values of the weight coefficient of the temperature change rate of the working environment and the weight coefficients of the temperature change rates of the liquid in different water cooling pipelines can be obtained. When the weight coefficient a of the temperature change rate of the working environment is 60% and the weight coefficient of the temperature change rate of the liquid in the water cooling pipeline is 40%, the energy-saving benefit brought by the refrigeration power of the condenser determined by the effective temperature change rate calculated by the formula (1) is better.
It can be understood that the refrigeration power of the condenser has the maximum value, and the condenser can only adopt the maximum refrigeration power to carry out heat dissipation work after the effective temperature change rate exceeds a certain threshold value. However, since the effective temperature change rate is related to both the working environment temperature change rate and the liquid temperature change rate inside the water cooling pipeline, and the degree of correlation is related to the corresponding weight coefficient thereof. When one is extremely large, there may be a role in affecting the other in calculating the effective rate of temperature change. Therefore, an effective value of the working environment temperature change rate and an effective value of the liquid temperature change rate in the water cooling pipeline need to be introduced, so that the situation that the accuracy of the effective temperature change rate is influenced when the working environment temperature change rate or the liquid temperature change rate in the water cooling pipeline has an extreme value can be eliminated.
Correspondingly, as shown in fig. 3, step S120 may be further refined into steps S121 to S122.
Step S121 is: and calculating the effective values of the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline.
Step S122 is: substituting the effective value of the temperature change rate of the working environment and the effective value of the temperature change rate of the liquid in the water cooling pipeline into a formula W ═ a ×. delta T1+b*ΔT2To calculate the effective temperature change rate. At this time, W is the effective temperature change rate，ΔT1Effective value of the rate of change of temperature of the working environment, Δ T2And a is the effective value of the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
More specifically, the extreme value situation that may occur in both of the effective value of the limit operating environment temperature change rate and the maximum value of the effective value of the liquid temperature change rate in the water-cooled pipe can be prevented.
Correspondingly, the step S121 may specifically be configured as follows: in response to the working environment temperature change rate being greater than the maximum change threshold, setting the maximum change threshold as an effective value of the working environment temperature change rate; or responding to the working environment temperature change rate being less than or equal to the maximum change threshold value, and setting the working environment temperature change rate as an effective value of the working environment temperature change rate; responding to the fact that the liquid temperature change rate in the water-cooling pipeline is larger than the maximum change threshold value of the liquid temperature change rate, and setting the maximum change threshold value as an effective value of the liquid temperature change rate in the water-cooling pipeline; or responding to the liquid temperature change rate in the water-cooling pipeline being less than or equal to the maximum change threshold value, and setting the liquid temperature change rate in the water-cooling pipeline as the effective value of the liquid temperature change rate in the water-cooling pipeline.
Preferably, the maximum variation threshold may be set according to a value of the effective temperature variation rate corresponding to the maximum operating power of the condenser. In a specific embodiment, the maximum variation threshold is set to 2.5.
Further, to simplify the control process of the temperature control method, the cooling power of the condenser is set to a plurality of fixed gears, for example, three gears are set, and the three gears correspond to the lower cooling mode, the middle cooling mode and the high cooling mode, respectively.
Correspondingly, as shown in fig. 4, step S130 may be further specifically set to steps S131 to S133.
Step S131 is: and controlling the condenser to operate at a first refrigeration power in response to the effective temperature change rate being less than a first preset threshold value.
Step S132 is: and controlling the condenser to operate at a second refrigeration power in response to the effective temperature change rate being greater than the first preset threshold and less than a second preset threshold.
Step S133 is: and controlling the condenser to operate at a third refrigeration power in response to the effective temperature change rate being greater than the second preset threshold.
The first refrigeration power is smaller than the second refrigeration power, and the second refrigeration power is smaller than the third refrigeration power. It is understood that the first cooling power corresponds to low-speed cooling, the second cooling power corresponds to medium-speed cooling, and the third cooling power corresponds to high-speed cooling.
Furthermore, under different refrigeration powers, the heat dissipation efficiency of the heat dissipation device is different, and the situation that the refrigeration power required by the tested motor changes may exist, so that different working times can be set based on the refrigeration powers with different sizes, and after the corresponding working time is finished, the proper refrigeration power is determined again by continuing the refrigeration power judgment process, and the energy saving performance can be further improved.
Correspondingly, as shown in fig. 5, the temperature control method 100 further includes steps S140 to S150.
Step S140 is: setting a defined operating time of the cooling power based on the cooling power of the condenser.
The limited operation time may be determined based on the heat dissipation efficiency of the heat sink for the cooling power of different gears. The higher the cooling efficiency that higher refrigerating power can provide, the higher the heat dissipation efficiency of the measured motor becomes, and the temperature gradually decreases, and the heat dissipation efficiency that it needs may decrease, therefore the length of the limited operating time may be inversely related to the magnitude of the refrigerating power. For example, the limited working time corresponding to high-speed refrigeration is 20s, the limited working time corresponding to medium-speed refrigeration is 1min, and the limited working time corresponding to low-speed refrigeration is 5 min.
Step S150 is: and in response to the time that the condenser operates at the current refrigerating power reaching the limited working time of the current refrigerating power, determining the refrigerating power of the condenser again based on the current effective temperature change rate.
It will be appreciated that the re-determined cooling power may be the same as the cooling power during the last defined operation time.
While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.
According to a further aspect of the present invention, there is provided a computer storage medium having a computer program stored thereon, the computer program when executed implementing the steps of any of the temperature control methods described above.
According to another aspect of the present invention, there is provided a temperature control apparatus for a butt bench. The butt-support experiment bench is an experiment bench comprising a heat dissipation device with adjustable heat dissipation power. The heat dissipation device with adjustable heat dissipation power can be a condenser which comprises a water cooling pipeline and is used for refrigerating liquid in the water cooling pipeline. The low-temperature liquid refrigerated by the condenser circulates in the water-cooling pipeline, and the low-temperature liquid in the water-cooling pipeline exchanges heat with the tested motor to dissipate heat of the tested motor at the position where the water-cooling pipeline is contacted with the tested motor. The temperature control device mainly controls the heat dissipation power of the heat dissipation device by controlling the refrigeration power of a condenser in the heat dissipation device.
In one embodiment, as illustrated in fig. 6, a temperature control apparatus 600 for a setback laboratory bench includes a memory 610 and a processor 620.
The memory 610 is used to store computer programs.
A processor 620 is coupled to the memory 610 for executing the computer programs stored in the memory 610, the processor 620 being configured to: acquiring the temperature change rate of a working environment and the temperature change rate of liquid in the water cooling pipeline; calculating the effective temperature change rate of the heat dissipation device based on the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; and determining the refrigeration power of the condenser based on the effective temperature change rate.
Operating ambient temperature refers to the ambient temperature at which processor 620 is located. The working environment temperature change rate is the change difference of the environment temperature in unit time.
The liquid temperature in the water-cooling pipeline refers to the liquid temperature at the water outlet of the water-cooling pipeline, namely the liquid temperature after heat exchange with the tested motor is completed. The liquid temperature change rate in the water-cooling pipeline refers to the water temperature change difference at the water outlet of the water-cooling pipeline in unit time.
The "acquiring" may be receiving temperature data detected in a unit time interval thereof from a temperature sensor device for detecting the ambient temperature and the liquid temperature, or may mean receiving calculated change rate data thereof from a calculation module for calculating a change rate of the temperature of the working environment and a calculation module for calculating a change rate of the temperature of the water temperature.
The effective temperature is an index which can be used for measuring the temperature of the tested motor, the change rate of the effective temperature can indicate the heat production quantity of the tested motor, and the heat production quantity of the tested motor is a reference for selecting proper heat dissipation power by the heat dissipation device.
It will be appreciated that the effective rate of change of temperature may be indicative of the heat production of the motor under test, with the higher the heat production of the motor under test, the greater the cooling power required to the condenser.
Further, the processor 620 may be further configured to: acquiring the temperature of a working environment and the temperature of liquid at a water outlet of a water cooling pipeline; and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
The temperature of the working environment can be detected through a temperature sensor arranged on the surface close to the processor, and the temperature of the liquid at the water outlet of the water cooling pipeline can be detected through a temperature sensor arranged at the water outlet of the water cooling pipeline.
And respectively calculating the working environment temperature change rate in a period of time and the liquid temperature change rate in the water cooling pipeline based on the detection frequency or detection time interval of the temperature sensor for detecting the working environment temperature and the temperature sensor for detecting the liquid temperature in the water cooling pipeline.
Preferably, in order to further improve the energy-saving performance of the heat dissipation device, the condenser can be opened when the condenser needs to be opened, and the condenser is closed when the tested motor does not need to perform high-speed heat dissipation, and only heat is dissipated through circulating liquid in the water cooling pipeline.
Correspondingly, the processor 620 may be further configured to: and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline in response to the working environment temperature being greater than a preset refrigeration starting temperature threshold value.
Further, the weight coefficients occupied by the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline in the calculation method of the effective temperature change rate can be set based on the correlation degree of the working environment temperature change rate and the heat production amount of the motor to be measured and the correlation degree of the liquid temperature change rate in the water cooling pipeline and the heat production amount of the motor to be measured.
Specifically, a simulation experiment of the simulation test of the Matlab tool can be used for determining the calculation formula of the effective temperature change rate.
In general, the effective rate of temperature change can be expressed using the following equation:
W＝a*ΔT1+b*ΔT2 (1)
wherein W is the effective temperature change rate, Δ T1Is the rate of change of temperature, Δ T, of the working environment2The weight coefficient is the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
The processor 620 may be further configured to: substituting the obtained working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline into formula (1) to calculate the effective temperature change rate.
It can be understood that the weight coefficients of different working environment temperature change rates and the weight coefficients of different liquid temperature change rates in the water cooling pipelines can indicate effective temperature change rates to different degrees. Through simulation calculation, the optimal values of the weight coefficient of the temperature change rate of the working environment and the weight coefficients of the temperature change rates of the liquid in different water cooling pipelines can be obtained. When the weight coefficient a of the temperature change rate of the working environment is 60% and the weight coefficient of the temperature change rate of the liquid in the water cooling pipeline is 40%, the energy-saving benefit brought by the refrigeration power of the condenser determined by the effective temperature change rate calculated by the formula (1) is better.
It can be understood that the refrigeration power of the condenser has the maximum value, and the condenser can only adopt the maximum refrigeration power to carry out heat dissipation work after the effective temperature change rate exceeds a certain threshold value. However, since the effective temperature change rate is related to both the working environment temperature change rate and the liquid temperature change rate inside the water cooling pipeline, and the degree of correlation is related to the corresponding weight coefficient thereof. When one is extremely large, there may be a role in affecting the other in calculating the effective rate of temperature change. Therefore, an effective value of the working environment temperature change rate and an effective value of the liquid temperature change rate in the water cooling pipeline need to be introduced, so that the situation that the accuracy of the effective temperature change rate is influenced when the working environment temperature change rate or the liquid temperature change rate in the water cooling pipeline has an extreme value can be eliminated.
Correspondingly, the processor 620 is further configured to: calculating effective values of the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; substituting the effective value of the temperature change rate of the working environment and the effective value of the temperature change rate of the liquid in the water cooling pipeline into a formula W ═ a ×. delta T1+b*ΔT2To calculate the effective temperature change rate. At this time, W is the effective temperature change rate, Δ T1Effective value of the rate of change of temperature of the working environment, Δ T2And a is the effective value of the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
More specifically, the extreme value situation that may occur in both of the effective value of the limit operating environment temperature change rate and the maximum value of the effective value of the liquid temperature change rate in the water-cooled pipe can be prevented.
Correspondingly, the processor 620 is further configured to: in response to the working environment temperature change rate being greater than the maximum change threshold, setting the maximum change threshold as an effective value of the working environment temperature change rate; or responding to the working environment temperature change rate being less than or equal to the maximum change threshold value, and setting the working environment temperature change rate as an effective value of the working environment temperature change rate; responding to the fact that the liquid temperature change rate in the water-cooling pipeline is larger than the maximum change threshold value of the liquid temperature change rate, and setting the maximum change threshold value as an effective value of the liquid temperature change rate in the water-cooling pipeline; or responding to the liquid temperature change rate in the water-cooling pipeline being less than or equal to the maximum change threshold value, and setting the liquid temperature change rate in the water-cooling pipeline as the effective value of the liquid temperature change rate in the water-cooling pipeline.
Preferably, the maximum variation threshold may be set according to a value of the effective temperature variation rate corresponding to the maximum operating power of the condenser. In a specific embodiment, the maximum variation threshold is set to 2.5.
Further, to simplify the control process of the temperature control method, the cooling power of the condenser is set to a plurality of fixed gears, for example, three gears are set, and the three gears correspond to the lower cooling mode, the middle cooling mode and the high cooling mode, respectively.
Correspondingly, the processor 620 may be further configured to: controlling the condenser to operate at a first refrigeration power in response to the effective temperature change rate being less than a first preset threshold; controlling the condenser to operate at a second refrigeration power in response to the effective temperature change rate being greater than the first preset threshold and less than a second preset threshold; and controlling the condenser to operate at a third refrigeration power in response to the effective temperature change rate being greater than the second preset threshold.
The first refrigeration power is smaller than the second refrigeration power, and the second refrigeration power is smaller than the third refrigeration power. It is understood that the first cooling power corresponds to low-speed cooling, the second cooling power corresponds to medium-speed cooling, and the third cooling power corresponds to high-speed cooling.
Furthermore, under different refrigeration powers, the heat dissipation efficiency of the heat dissipation device is different, and the situation that the refrigeration power required by the tested motor changes may exist, so that different working times can be set based on the refrigeration powers with different sizes, and after the corresponding working time is finished, the proper refrigeration power is determined again by continuing the refrigeration power judgment process, and the energy saving performance can be further improved.
Correspondingly, the processor 620 may be further configured to: setting a defined working time of the refrigeration power based on the refrigeration power of the condenser; and in response to the time that the condenser operates at the current refrigerating power reaching the limited working time of the current refrigerating power, determining the refrigerating power of the condenser again based on the current effective temperature change rate.
The limited operation time may be determined based on the heat dissipation efficiency of the heat sink for the cooling power of different gears. The higher the cooling efficiency that higher refrigerating power can provide, the higher the heat dissipation efficiency of the measured motor becomes, and the temperature gradually decreases, and the heat dissipation efficiency that it needs may decrease, therefore the length of the limited operating time may be inversely related to the magnitude of the refrigerating power. For example, the limited working time corresponding to high-speed refrigeration is 20s, the limited working time corresponding to medium-speed refrigeration is 1min, and the limited working time corresponding to low-speed refrigeration is 5 min.
It will be appreciated that the re-determined cooling power may be the same as the cooling power during the last defined operation time.
According to yet another aspect of the present invention, as shown in FIG. 7, a butt bench 700 is provided. The pair of stand test beds 700 includes a heat sink 710 for dissipating heat from the motor under test and a temperature control device 720 as described in any of the above embodiments. The heat dissipation device comprises a water-cooling pipeline (not shown) and a condenser (not shown) for dissipating heat of liquid in the water-cooling pipeline, and the water-cooling pipeline is in contact with the motor to be tested to dissipate heat of the motor to be tested.
Those of skill in the art would understand that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits (bits), symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The various illustrative logical modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks (disks) usually reproduce data magnetically, while discs (discs) reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the invention is to be defined by the appended claims and not by the specific constructions and components of the embodiments illustrated above. Those skilled in the art can make various changes and modifications to the embodiments within the spirit and scope of the present invention, and these changes and modifications also fall within the scope of the present invention.
Claims (12)
1. The utility model provides a to holding in palm the temperature control method of experiment rack, to holding in the palm the experiment rack and including the heat abstractor for the measured motor heat dissipation, heat abstractor includes water-cooling pipeline and for the refrigerated condenser of liquid in the water-cooling pipeline, the water-cooling pipeline with the measured motor contact is for the measured motor heat dissipation, its characterized in that, the temperature control method includes:
acquiring the temperature change rate of a working environment and the temperature change rate of liquid in the water cooling pipeline;
calculating the effective temperature change rate of the heat dissipation device based on the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; and
and determining the refrigeration power of the condenser based on the effective temperature change rate.
2. The method of claim 1, wherein calculating the effective rate of temperature change of the heat sink based on the operating environment rate of temperature change and the rate of liquid temperature change within the water-cooled conduit comprises:
substituting the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline into a calculation formula W (a) delta T of the effective temperature change rate1+b*ΔT2Calculating the effective temperature change rate, wherein W is the effective temperature change rate, and delta T1Is the rate of change of temperature, Δ T, of the working environment2And the weight coefficient is the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
3. The temperature control method according to claim 2, wherein the weight coefficient of the temperature change rate of the working environment is 60%, and the weight coefficient of the temperature change rate of the liquid in the water-cooled pipe is 40%.
4. The method of claim 2, wherein calculating the effective rate of temperature change of the heat sink based on the operating environment rate of temperature change and the rate of liquid temperature change within the water-cooled conduit further comprises:
calculating effective values of the temperature change rate of the working environment and the temperature change rate of the liquid in the water cooling pipeline; and
substituting the effective value of the working environment temperature change rate and the effective value of the liquid temperature change rate in the water cooling pipeline into a calculation formula W of the effective temperature change rate1+b*ΔT2Calculating the effective temperature change rate, wherein W is the effective temperature change rate, and delta T1Effective value of the rate of change of temperature of the working environment, Δ T2And a is the effective value of the liquid temperature change rate in the water-cooling pipeline, a is the weight coefficient of the temperature change rate of the working environment, and b is the weight coefficient of the liquid temperature change rate in the water-cooling pipeline.
5. The method of claim 4, wherein calculating the effective values of the operating environment temperature rate of change and the liquid temperature rate of change in the water cooled pipeline comprises:
in response to the operating environment temperature change rate being greater than a maximum change threshold, setting the maximum change threshold to a valid value of the operating environment temperature change rate; or
In response to the operating environment temperature change rate being less than or equal to the maximum change threshold, setting the operating environment temperature change rate to an effective value of the operating environment temperature change rate; and
responding to the fact that the liquid temperature change rate in the water-cooling pipeline is larger than the maximum change threshold value, and setting the maximum change threshold value as an effective value of the liquid temperature change rate in the water-cooling pipeline; or
And responding to the fact that the liquid temperature change rate in the water-cooling pipeline is smaller than or equal to the maximum change threshold value, and setting the liquid temperature change rate in the water-cooling pipeline as an effective value of the liquid temperature change rate in the water-cooling pipeline.
6. The method of claim 1, wherein the determining the cooling power of the condenser based on the effective rate of temperature change comprises:
controlling the condenser to operate at a first refrigeration power in response to the effective temperature change rate being less than a first preset threshold;
controlling the condenser to operate at a second refrigeration power in response to the effective temperature change rate being greater than the first preset threshold and less than a second preset threshold; and
and responding to the fact that the effective temperature change rate is larger than a second preset threshold value, controlling the condenser to operate at a third refrigerating power, wherein the first refrigerating power is smaller than the second refrigerating power, and the second refrigerating power is smaller than the third refrigerating power.
7. The method of claim 1, wherein the obtaining the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline comprises:
acquiring the temperature of a working environment and the temperature of liquid at a water outlet of the water cooling pipeline; and
and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
8. The method of claim 7, wherein calculating the operating environment temperature rate of change and the liquid temperature rate of change in the water-cooled pipeline based on the operating environment temperature and the outlet liquid temperature of the water-cooled pipeline, respectively, further comprises:
and responding to the fact that the working environment temperature is larger than a refrigeration starting temperature threshold value, and respectively calculating the working environment temperature change rate and the liquid temperature change rate in the water cooling pipeline based on the working environment temperature and the water outlet liquid temperature of the water cooling pipeline.
9. The temperature control method of claim 1, further comprising:
setting a defined working time of the refrigeration power based on the refrigeration power of the condenser; and
and in response to the time that the condenser operates at the current refrigerating power reaching the limited working time of the current refrigerating power, determining the refrigerating power of the condenser again based on the current effective temperature change rate.
10. A temperature control apparatus for a butt-holding experiment bench, the butt-holding experiment bench comprising a heat dissipation apparatus for dissipating heat of a tested motor, the heat dissipation apparatus comprising a water-cooled pipe and a condenser for dissipating heat of a liquid in the water-cooled pipe, the water-cooled pipe being in contact with the tested motor for dissipating heat of the tested motor, the temperature control apparatus comprising a memory and a processor, the processor being configured to implement the steps of the temperature control method according to any one of claims 1 to 9 when executed.
11. An opposite-support experiment bench, which comprises a heat dissipation device for dissipating heat of a tested motor, wherein the heat dissipation device comprises a water-cooled pipeline and a condenser for dissipating heat of liquid in the water-cooled pipeline, the water-cooled pipeline is in contact with the tested motor to dissipate heat of the tested motor, and the opposite-support experiment bench further comprises the temperature control device as claimed in claim 10.
12. A computer storage medium having a computer program stored thereon, wherein the computer program when executed implements the steps of the temperature control method according to any one of claims 1-9.
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| JP7327355B2 (en) * | 2020-11-05 | 2023-08-16 | トヨタ自動車株式会社 | Map update device and map update method |
| CN114938914B (en) * | 2021-11-05 | 2024-06-25 | 广东美芝制冷设备有限公司 | Refrigeration control method, control device and cooking utensil |
| CN118226906B (en) * | 2024-04-01 | 2024-09-27 | 佛山市创昕医疗器械有限公司 | Water outlet temperature control method and system of dental unit |
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