CN108458812A - The acquisition methods and acquisition device of motor winding temperature - Google Patents
The acquisition methods and acquisition device of motor winding temperature Download PDFInfo
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- CN108458812A CN108458812A CN201710090543.0A CN201710090543A CN108458812A CN 108458812 A CN108458812 A CN 108458812A CN 201710090543 A CN201710090543 A CN 201710090543A CN 108458812 A CN108458812 A CN 108458812A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
- G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
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- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a kind of acquisition methods of motor winding temperature.Acquisition methods include：Heating coefficient and coefficient of temperature drop are calculated according to the systematic sampling time；Warming temperature is calculated according to heating coefficient；Cooling temperature is calculated according to coefficient of temperature drop；The winding temperature at current time is obtained with according to the winding temperature of previous moment, warming temperature and cooling temperature computation.In addition, the invention also discloses a kind of acquisition device.The acquisition methods and acquisition device of the present invention obtain motor temperature by measuring voltage, rotating speed and environment temperature, since above-mentioned parameter can be obtained easily, thus can reduce the influence of the error and extraneous factor of motor temperature acquisition.On the other hand, the heating coefficient in the present invention and the coefficient of temperature drop only build-in attribute with motor and systematic sampling time correlation, and it is unrelated with motor operating state, so when motor operating state changes, heating coefficient and coefficient of temperature drop need not be reacquired.
Description
Technical field
The present invention relates to electric motor temp field, more particularly to the acquisition methods and acquisition device of a kind of motor winding temperature.
Background technology
In the related art, motor temperature is measured generally by sensor.Such as utilize contact or non-contact
The temperature sensor of formula measures, using contact temperature sensor measurement when, temperature sensor is generally located on motor
It on winding, is easy to cause contact of the sensor with motor ineffective due to the rotation of motor, be obtained to increase motor temperature
Error；When using contactless temperature sensor, contactless temperature sensor is easy by extraneous factor, such as light
Influence, to increase motor temperature acquisition error.
Invention content
The present invention is directed at least solve one of technical problem present in the relevant technologies.For this purpose, embodiments of the present invention
Provide a kind of acquisition methods and acquisition device of motor winding temperature.
A kind of acquisition methods of motor winding temperature of embodiment of the present invention, include the following steps：
Obtain the winding temperature of the previous moment of the motor, the motor speed at current time, the power supply at current time electricity
Pressure, the environment temperature at current time and systematic sampling time；
When according to internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality of the motor at 0 DEG C and the systematic sampling
Between calculate the heating coefficient and coefficient of temperature drop of the machine winding, the heating coefficient and the systematic sampling time positive correlation,
It is negatively correlated with internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality of the motor at 0 DEG C, the coefficient of temperature drop with it is described
Systematic sampling time and the surface coefficient of heat transfer positive correlation, it is negatively correlated with the specific heat capacity and quality of the motor；
Utilize the motor speed, the supply voltage, the winding temperature of the previous moment and the heating coefficient meter
Calculation obtains warming temperature；
Cooling temperature is calculated using the winding temperature of the previous moment, the environment temperature and the coefficient of temperature drop
Degree；With
The motor is obtained according to the winding temperature of the previous moment, the warming temperature and the cooling temperature computation
Current time winding temperature.
In some embodiments, the heating coefficient calculates gained by following first formula： The coefficient of temperature drop calculates gained by following second formula：Its
In, R0The internal resistance value for being the motor at 0 DEG C, c is the specific heat capacity of the motor, and m is the quality of the motor, and μ is described
The surface coefficient of heat transfer of motor, △ t are the systematic sampling time.
In some embodiments, the internal resistance value according to the motor at 0 DEG C, surface coefficient of heat transfer, specific heat capacity
The step of calculating the heating coefficient and coefficient of temperature drop of the machine winding with quality and the systematic sampling time includes following step
Suddenly：
Obtain the model of the motor；
The internal resistance value corresponding with the model, predetermined system sampling time, default liter are searched in the preset database
Warm coefficient and default coefficient of temperature drop；
According to the internal resistance value, the predetermined system sampling time, the default heating coefficient, the default cooling system
Several, described first formula and second formula calculate the product of the specific heat capacity and the quality and the surface radiating system
Number；With
The heating coefficient and described is calculated according to the systematic sampling time, first formula and second formula
Coefficient of temperature drop.
In some embodiments, the warming temperature calculates gained according to following third formula：Theating=(U-Ktω
)2(1+0.00426Ti-1)Cheating, the cooling temperature is according to following 4th formula calculating gained：Tcooling=(Ti-1-Te)
Ccooling, wherein TheatingFor the warming temperature, U is the supply voltage, KtFor torque coefficient, ω is the motor speed,
Ti-1For the winding temperature of the previous moment, CheatingFor the heating coefficient, TcoolingFor the cooling temperature, TeIt is described
Environment temperature, CcoolingFor the coefficient of temperature drop.
In some embodiments, the winding temperature, the warming temperature and the drop according to the previous moment
Temperature thermometer is calculated the step of obtaining the winding temperature at the current time of the motor and is included the following steps：
Using the winding temperature of the previous moment plus the warming temperature subtract it is described cooling temperature after temperature as
The winding temperature at the current time.
In some embodiments, the winding temperature, the warming temperature and the drop according to the previous moment
Temperature thermometer is calculated the step of obtaining the winding temperature at the current time of the motor and is included the following steps：
Judge whether the motor is in operating status；
When the motor is in operating status, by the winding temperature of the previous moment and the warming temperature and value
Winding temperature as the current time；With
When the motor is in halted state, by the difference of the winding temperature of the previous moment and the cooling temperature
Winding temperature as the current time.
A kind of acquisition device of motor winding temperature of embodiment of the present invention include acquisition module, the first computing module,
Second computing module, third computing module and the 4th computing module.
The acquisition module be used to obtain the winding temperature of previous moment of the motor, the motor speed at current time,
The supply voltage at current time, the environment temperature at current time and systematic sampling time.
First computing module be used for internal resistance value according to the motor at 0 DEG C, surface coefficient of heat transfer, specific heat capacity and
Quality and the systematic sampling time calculate the heating coefficient and coefficient of temperature drop of the machine winding, the heating coefficient with it is described
The positive correlation of systematic sampling time, it is negatively correlated with internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality of the motor at 0 DEG C,
The coefficient of temperature drop and the systematic sampling time and the surface coefficient of heat transfer positive correlation, specific heat capacity and matter with the motor
Amount is negatively correlated.
Second computing module is used for the winding using the motor speed, the supply voltage, the previous moment
Warming temperature is calculated in temperature and the heating coefficient.
The third computing module is used for winding temperature, the environment temperature and the cooling using the previous moment
Cooling temperature is calculated in coefficient.
4th computing module is used for winding temperature, the warming temperature and the cooling according to the previous moment
Temperature computation obtains the winding temperature at the current time of the motor.
In some embodiments, the heating coefficient calculates gained by following first formula： The coefficient of temperature drop calculates gained by following second formula：Its
In, R0The internal resistance value for being the motor at 0 DEG C, c is the specific heat capacity of the motor, and m is the quality of the motor, and μ is described
The surface coefficient of heat transfer of motor, △ t are the systematic sampling time.
In some embodiments, first computing module include acquiring unit, searching unit, the first computing unit and
Second computing unit.
The acquiring unit is used to obtain the model of the motor.
The searching unit for searching the internal resistance value corresponding with the model, predetermined system in the preset database
Sampling time, default heating coefficient and default coefficient of temperature drop.
First computing unit is used for according to the internal resistance value, the predetermined system sampling time, the default heating
Coefficient, the default coefficient of temperature drop, first formula and second formula calculate multiplying for the specific heat capacity and the quality
The long-pending and described surface coefficient of heat transfer.
Second computing unit is based on according to the systematic sampling time, first formula and second formula
Calculate the heating coefficient and the coefficient of temperature drop.
In some embodiments, the warming temperature calculates gained according to following third formula：Theating=(U-Ktω
)2(1+0.00426Ti-1)Cheating, the cooling temperature is according to following 4th formula calculating gained：Tcooling=(Ti-1-Te)
Ccooling, wherein TheatingFor the warming temperature, U is the supply voltage, KtFor torque coefficient, ω is the motor speed,
Ti-1For the winding temperature of the previous moment, CheatingFor the heating coefficient TcoolingFor the cooling temperature, TeIt is described
Environment temperature, CcoolingFor the coefficient of temperature drop.
In some embodiments, the 4th computing module is used for the winding temperature of the previous moment plus described
Warming temperature subtracts winding temperature of the temperature as the current time after the cooling temperature.
In some embodiments, the 4th computing module includes judging unit and third computing unit.
The judging unit is for judging whether the motor is in operating status.
The third computing unit is used for when the motor is in operating status, by the winding temperature of the previous moment
With the winding temperature warming temperature and that value is as the current time.
The third computing unit is used for when the motor is in halted state, by the winding temperature of the previous moment
With winding temperature of the difference as the current time of the cooling temperature.
The acquisition methods and acquisition device of embodiment of the present invention obtain electricity by measuring voltage, rotating speed and environment temperature
Machine temperature since above-mentioned parameter can be obtained easily, thus can reduce the error and extraneous factor of motor temperature acquisition
It influences.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, wherein：
Fig. 1 is the flow diagram of the acquisition methods of the motor winding temperature of embodiment of the present invention.
Fig. 2 is the acquisition device of the motor winding temperature of embodiment of the present invention and the high-level schematic functional block diagram of motor.
Fig. 3 is another flow diagram of the acquisition methods of the motor winding temperature of embodiment of the present invention.
Fig. 4 is the high-level schematic functional block diagram of the first computing module of embodiment of the present invention.
Fig. 5 is the another flow diagram of the acquisition methods of the motor winding temperature of embodiment of the present invention.
Fig. 6 is another flow diagram of the acquisition methods of the motor winding temperature of embodiment of the present invention.
Fig. 7 is another function module signal of the acquisition device and motor of the motor winding temperature of embodiment of the present invention
Figure.
Main element symbol description：
Acquisition device 10, acquisition module 11, the first computing module 13, acquiring unit 132, searching unit 134, first calculate
Unit 136, the second computing unit 138, the second computing module 15, third computing module 17, the 4th computing module 19, judging unit
194, third computing unit 196, motor 20, winding 21.
Specific implementation mode
Embodiments of the present invention are described below in detail, the embodiment of the embodiment is shown in the accompanying drawings, wherein
Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below
It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the present invention, and should not be understood as the limit to the present invention
System.
Referring to Fig. 1, the acquisition methods of the motor winding temperature of embodiment of the present invention include the following steps：
S11：Obtain the winding temperature of previous moment, the motor speed at current time, the power supply at the current time electricity of motor
Pressure, the environment temperature at current time and systematic sampling time；
S13：According to internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality and systematic sampling time meter of the motor at 0 DEG C
Calculate the heating coefficient and coefficient of temperature drop of machine winding, heating coefficient and the positive correlation of systematic sampling time, with motor at 0 DEG C in
Resistance value, surface coefficient of heat transfer, specific heat capacity and quality are negatively correlated, coefficient of temperature drop and systematic sampling time and surface coefficient of heat transfer positive
It closes, it is negatively correlated with the specific heat capacity and quality of motor；
S15：Heating temperature is calculated using motor speed, supply voltage, the winding temperature of previous moment and heating coefficient
Degree；
S17：Cooling temperature is calculated using the winding temperature of previous moment, environment temperature and coefficient of temperature drop；With
S19：The current time of motor is obtained according to the winding temperature of previous moment, warming temperature and cooling temperature computation
Winding temperature.
Referring to Fig. 2, the acquisition device 10 of the motor winding temperature of embodiment of the present invention includes acquisition module 11, first
Computing module 13, the second computing module 15, third computing module 17 and the 4th computing module 19.Acquisition module 11 is for obtaining electricity
The winding temperature of the previous moment of machine, the motor speed at current time, the supply voltage at current time, the environment temperature at current time
Degree and systematic sampling time.First computing module 13 is used for internal resistance value, surface coefficient of heat transfer, specific heat according to motor at 0 DEG C
Hold the heating coefficient and coefficient of temperature drop that machine winding is calculated with quality and systematic sampling time, heating coefficient and systematic sampling time
Positive correlation, negatively correlated with internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality of the motor at 0 DEG C, coefficient of temperature drop is adopted with system
Sample time and surface coefficient of heat transfer positive correlation, it is negatively correlated with the specific heat capacity and quality of motor.Second computing module 15 is for utilizing
Warming temperature is calculated in motor speed, supply voltage, the winding temperature of previous moment and heating coefficient.Third computing module 17
For cooling temperature to be calculated using the winding temperature of previous moment, environment temperature and coefficient of temperature drop.4th computing module 19
Winding temperature for the current time for obtaining motor according to the winding temperature of previous moment, warming temperature and cooling temperature computation
Degree.
In other words, the acquisition methods of embodiment of the present invention can be real by the acquisition device 10 of embodiment of the present invention
It is existing, wherein step S11 can be realized that step S13 can realize that step S15 can by the first computing module 13 by acquisition module 11
To be realized by the second computing module 15, step S17 can be realized by third computing module 17, and step S19 can be calculated by the 4th
Module 19 is realized.
The acquisition methods and acquisition device 10 of embodiment of the present invention are obtained by measuring voltage, rotating speed and environment temperature
Motor temperature since above-mentioned parameter can be obtained easily, thus can reduce the error and extraneous factor of motor temperature acquisition
Influence.
Further, the heating coefficient in embodiment of the present invention and coefficient of temperature drop with the build-in attribute of motor 20 and are only
The system sampling time is related, and unrelated with the state whether motor runs, so when motor operating state changes, does not need
Reacquire heating coefficient and coefficient of temperature drop, and then the step of simplifying acquisition methods.
Specifically, in some embodiments, the build-in attribute of motor 20 can refer to motor 20 and either run or stopping
The attribute that only state all has, for example, motor 20 internal resistance, quality, specific heat capacity, surface coefficient of heat transfer, torque coefficient etc..System
Sampling time can be the sampling period that motor temperature obtains, such as it refers to that every process obtains for one second that the systematic sampling time, which is 1 second,
Motor temperature；Current time refers to the correspondence time point of motor temperature to be obtained；Previous moment refer to relative to it is current when
The time point for the previous systematic sampling carved.
It is appreciated that motor 20 includes winding 21, and since the temperature of motor 20 is mainly reflected on winding 21, this hair
The winding temperature of bright embodiment may be regarded as motor temperature.It, can be by 20 local environment of motor when obtaining motor temperature for the first time
Winding temperature of the temperature as previous moment, the i.e. motor temperature of previous moment.In addition, motor speed can be by the phase on motor 20
It closes sensor to obtain, such as Hall sensor；Supply voltage can be measured by the correlation properties of circuit and be obtained；Environment temperature also may be used
It is obtained by the related sensor on motor 20, such as temperature sensor.
In some embodiments, heating coefficient calculates gained by following first formula： Coefficient of temperature drop calculates gained by following second formula：Wherein, R0
The internal resistance value for being motor 20 at 0 DEG C, c is the specific heat capacity of motor 20, and m is the quality of motor 20, and μ is the surface radiating of motor 20
Coefficient, △ t are the systematic sampling time.
Heating coefficient and coefficient of temperature drop are obtained in this way, can be calculated according to the first formula and the second formula.
Referring to Fig. 3, in some embodiments, step S13 includes the following steps：
S132：Obtain the model of motor 20；
S134：Internal resistance value corresponding with model, predetermined system sampling time, default heating system are searched in the preset database
Several and default coefficient of temperature drop；
S136：According to internal resistance value, the predetermined system sampling time, default heating coefficient, default coefficient of temperature drop, the first formula and
Second formula calculates the product and surface coefficient of heat transfer of specific heat capacity and quality；With
S138：Heating coefficient and coefficient of temperature drop are calculated according to systematic sampling time, the first formula and the second formula.
Referring to Fig. 4, in some embodiments, the first computing module 13 include acquiring unit 132, searching unit 134,
First computing unit 136 and the second computing unit 138.
Acquiring unit 132 is used to obtain the model of motor 20.Searching unit 134 is for lookup and type in the preset database
Number corresponding internal resistance value, predetermined system sampling time, default heating coefficient and default coefficient of temperature drop.First computing unit 136 is used
According to internal resistance value, predetermined system sampling time, default heating coefficient, default coefficient of temperature drop, the first formula and the second formula meter
Calculate the product and surface coefficient of heat transfer of specific heat capacity and quality.Second computing unit 138 is used for according to systematic sampling time, first
Formula and the second formula calculate heating coefficient and coefficient of temperature drop.
In other words, step S132 can be realized by acquiring unit 132, and step S134 can be realized by searching unit 134,
Step S136 can be realized that step S138 can be realized by the second computing unit 138 by the first computing unit 136.
In this way, can heating coefficient and coefficient of temperature drop directly be calculated according to the systematic sampling time.
Specifically, before motor 20 dispatches from the factory or before operation, it can be demarcated and be preset according to the predetermined system sampling time by experiment
Heat up coefficient, default coefficient of temperature drop.For example, predetermined system sampling time △ t ' can be determined by empirical value, adopted in predetermined system
After sample time △ t ' determines, in an experiment by carrying out cooling experiment after motor temperature is increased to certain temperature, according to default
The winding temperature T of systematic sampling time utilization temperature sensor measurement previous momenti-1', the winding temperature T at current timei' and
Environment temperature Te', according to formula Ti'=Ti-1′-(Ti-1′-Te′)Ccooling', so as to obtain default coefficient of temperature drop
Ccooling', when obtaining motor temperature for the first time, Ti-1' it is environment temperature.
On the other hand, heating experiment is carried out after above-mentioned cooling experiment, according to predetermined system sampling time △ t ' and utilized
The winding temperature T of temperature sensor measurement previous momenti-1', the winding temperature T at current timei' and environment temperature Te', at this time again
According to Ti'=Ti-1′+(U-Ktω)2(1+0.00426Ti-1′)Cheating′-(Ti-1′-Te′)Ccooling', it will be got in experiment
Supply voltage U, motor speed ω and default coefficient of temperature drop Ccooling' substitute into formula, it can calculate and obtain torque coefficient Kt
With default heating coefficient Cheating′。
Then, according to internal resistance value R0, predetermined system sampling time △ t ', default heating coefficient Cheating', default cooling system
Number Ccooling', the first formula and the second formula calculate cm and μ.
In motor normal use, systematic sampling time △ t, the cm and μ that get are substituted into the first formula and the second public affairs
Formula, you can calculate and obtain corresponding heating coefficient CheatingWith coefficient of temperature drop Ccooling。
In some embodiments, certain build-in attributes of motor 20, for example, specific heat capacity and quality product cm and table
Face coefficient of heat transfer μ etc. can not be directly acquired, and product cm and the surface of specific heat capacity and quality can be gone out by above-mentioned experimental calculation
Coefficient of heat transfer μ can directly be calculated so that in the case where the model of motor 20 determines by systematic sampling time △ t
Heat up coefficient CheatingWith coefficient of temperature drop Ccooling。
In some embodiments, the build-in attribute of motor 20, such as the product cm and surface of specific heat capacity and quality dissipate
Hot coefficient μ is known, then can directly substitute into relevant parameter in the first formula and the second formula to obtain the coefficient that heats up
And coefficient of temperature drop.
In some embodiments, warming temperature calculates gained according to following third formula：Theating=(U-Ktω)2(1+
0.00426Ti-1)Cheating, cooling temperature is according to following 4th formula calculating gained：Tcooling=(Ti-1-Te)Ccooling, wherein
TheatingFor warming temperature, U is supply voltage, KtFor torque coefficient, ω is motor speed, Ti-1For the winding temperature of previous moment
Degree, CheatingFor the coefficient that heats up, TcoolingFor the temperature that cools down, TeFor environment temperature, CcoolingFor coefficient of temperature drop.
Warming temperature and cooling temperature are obtained in this way, can be calculated according to third formula and the 4th formula.
It is appreciated that cooling temperature is related with the winding temperature of previous moment and the difference of environment temperature, difference is bigger, electricity
The heat exchange of machine 20 and environment is bigger, and motor temperature also just declines than very fast.On the other hand, warming temperature is with power supply electricity
Pressure, torque coefficient, motor speed, the winding temperature of previous moment and heating coefficient are related.
Referring to Fig. 5, in some embodiments, step S19 includes the following steps：
S192：The winding temperature of previous moment is subtracted into the temperature after cooling down temperature as current time plus warming temperature
Winding temperature.
In some embodiments, the 4th computing module 19 is for subtracting the winding temperature of previous moment plus warming temperature
Remove winding temperature of the temperature after cooling temperature as current time.
In other words, step S192 can be realized by the 4th computing module 19.
In this way, can winding temperature true according to reality, that current time is accurately calculated, i.e. motor temperature.
Referring to Fig. 6, in some embodiments, step S19 includes the following steps：
S194：Judge whether motor 20 is in operating status；
S196：When motor 20 is in operating status, by the winding temperature of previous moment and warming temperature and value conduct
The winding temperature at current time；With
S198：When motor 20 is in halted state, using the winding temperature of previous moment with cooling temperature difference as
The winding temperature at current time.
Referring to Fig. 7, in some embodiments, the 4th computing module 19 includes judging unit 194, third computing unit
196。
Judging unit 194 is for judging whether motor 20 is in operating status.Third computing unit 196 is used to work as motor 20
When in operating status, by the winding temperature of previous moment and warming temperature and be worth the winding temperature as current time, and
For when motor 20 is in halted state, using the difference of the winding temperature of previous moment and cooling temperature as current time
Winding temperature.
In other words, step S194 can be realized by judging unit 194, and step S196 and step S198 can be by third meters
Unit 196 is calculated to realize.
In this way, the acquisition process of motor temperature can be simplified according to the operating status of motor 20.
It is appreciated that in 20 operational process of motor, motor temperature rises at this time, and the warming temperature of motor 20 is far longer than
The cooling temperature of motor 20, therefore the cooling temperature of motor 20 can be ignored, using the winding temperature of previous moment plus heating
Temperature can be obtained the winding temperature at current time.When motor 20 stops, the warming temperature of motor 20 is zero, at this time motor temperature
Degree declines, and the winding temperature that cooling temperature can be obtained current time is subtracted using the winding temperature of previous moment.
In the description of the embodiment of invention, term " first ", " second " are used for description purposes only, and should not be understood as referring to
Show or imply relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include one or more feature.In the description of embodiments of the present invention
In, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be to be electrically connected or can mutually communicate；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the interaction relationship of the connection or two elements inside two elements.For ability
For the those of ordinary skill in domain, it can understand that above-mentioned term in embodiments of the present invention specific contains as the case may be
Justice.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the present invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system of such as computer based system including processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium includes following：With one or more wiring
Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary with it
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or combination thereof come real
It is existing.In the above-described embodiment, multiple steps or method can use storage in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application-specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realize all or part that the above embodiment method carries
Step is that relevant hardware can be instructed to complete by program, and the program can be stored in a kind of computer-readable storage
In medium, which includes the steps that one or a combination set of method embodiment when being executed.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module,
Can be that each unit physically exists alone, can also two or more units be integrated in a module.It is above-mentioned integrated
Module both may be used hardware form realize, can also be realized in the form of software function module.The integrated mould
If block is realized in the form of software function module and when sold or used as an independent product, can also be stored in a meter
In calculation machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
The above embodiment is changed, changes, replacing and modification.
Claims (12)
1. a kind of acquisition methods of motor winding temperature, which is characterized in that include the following steps：
Obtain the winding temperature of the previous moment of the motor, the motor speed at current time, the supply voltage at current time, when
The environment temperature at preceding moment and systematic sampling time；
According to internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality and systematic sampling time meter of the motor at 0 DEG C
The heating coefficient and coefficient of temperature drop of the machine winding, the heating coefficient and the systematic sampling time positive correlation are calculated, with institute
It is negatively correlated to state internal resistance value, surface coefficient of heat transfer, specific heat capacity and quality of the motor at 0 DEG C, the coefficient of temperature drop and the system
Sampling time and the surface coefficient of heat transfer positive correlation, it is negatively correlated with the specific heat capacity and quality of the motor；
It is calculated using the motor speed, the supply voltage, the winding temperature of the previous moment and the heating coefficient
To warming temperature；
Cooling temperature is calculated using the winding temperature of the previous moment, the environment temperature and the coefficient of temperature drop；With
Working as the motor is obtained according to the winding temperature of the previous moment, the warming temperature and the cooling temperature computation
The winding temperature at preceding moment.
2. acquisition methods as described in claim 1, which is characterized in that the heating coefficient is public by following first
Formula calculates gained：The coefficient of temperature drop calculates gained by following second formula：Wherein, R0The internal resistance value for being the motor at 0 DEG C, c is the specific heat capacity of the motor, m
For the quality of the motor, μ is the surface coefficient of heat transfer of the motor, and △ t are the systematic sampling time.
3. acquisition methods as claimed in claim 2, which is characterized in that internal resistance value, the table according to the motor at 0 DEG C
Face coefficient of heat transfer, specific heat capacity and quality and the systematic sampling time calculate the heating coefficient and coefficient of temperature drop of the machine winding
The step of include the following steps：
Obtain the model of the motor；
The internal resistance value corresponding with the model, predetermined system sampling time, default heating system are searched in the preset database
Several and default coefficient of temperature drop；
According to the internal resistance value, the predetermined system sampling time, the default heating coefficient, the default coefficient of temperature drop, institute
It states the first formula and second formula calculates the product of the specific heat capacity and the quality and the surface coefficient of heat transfer；With
The heating coefficient and the cooling are calculated according to the systematic sampling time, first formula and second formula
Coefficient.
4. acquisition methods as described in claim 1, which is characterized in that the warming temperature calculates institute according to following third formula
：Theating=(U-Ktω)2(1+0.00426Ti-1)Cheating, the cooling temperature is according to following 4th formula calculating gained：
Tcooling=(Ti-1-Te)Ccooling, wherein TheatingFor the warming temperature, U is the supply voltage, KtFor torque coefficient, ω
For the motor speed, Ti-1For the winding temperature of the previous moment, CheatingFor the heating coefficient, TcoolingFor the drop
Temperature, TeFor the environment temperature, CcoolingFor the coefficient of temperature drop.
5. acquisition methods as described in claim 1, which is characterized in that the winding temperature according to the previous moment, institute
The step of stating warming temperature and the winding temperature at cooling temperature computation current time for obtaining the motor includes following step
Suddenly：
Using the winding temperature of the previous moment plus the warming temperature subtract it is described cooling temperature after temperature as described in
The winding temperature at current time.
6. acquisition methods as described in claim 1, which is characterized in that the winding temperature according to the previous moment, institute
The step of stating warming temperature and the winding temperature at cooling temperature computation current time for obtaining the motor includes following step
Suddenly：
Judge whether the motor is in operating status；
When the motor is in operating status, by the winding temperature of the previous moment and the warming temperature and be worth conduct
The winding temperature at the current time；With
When the motor is in halted state, using the winding temperature of the previous moment with it is described cooling temperature difference as
The winding temperature at the current time.
7. a kind of acquisition device of motor winding temperature, which is characterized in that including：
Acquisition module, the acquisition module are used to obtain winding temperature, the motor at current time of the previous moment of the motor
Rotating speed, the supply voltage at current time, the environment temperature at current time and systematic sampling time；
First computing module, first computing module are used for internal resistance value according to the motor at 0 DEG C, surface radiating system
Number, specific heat capacity and quality and the systematic sampling time calculate the heating coefficient and coefficient of temperature drop of the machine winding, the liter
Warm coefficient and the systematic sampling time positive correlation, with internal resistance value of the motor at 0 DEG C, surface coefficient of heat transfer, specific heat capacity
With quality negative correlation, the coefficient of temperature drop and the systematic sampling time and the surface coefficient of heat transfer positive correlation, with the electricity
The specific heat capacity and quality of machine are negatively correlated；
Second computing module, second computing module be used for using the motor speed, the supply voltage, it is described previous when
Warming temperature is calculated in the winding temperature at quarter and the heating coefficient；
Third computing module, the third computing module are used for the winding temperature using the previous moment, the environment temperature
Cooling temperature is calculated with the coefficient of temperature drop；With
4th computing module, the 4th computing module is for winding temperature, the warming temperature according to the previous moment
The winding temperature at the current time of the motor is obtained with the cooling temperature computation.
8. acquisition device as claimed in claim 7, which is characterized in that the heating coefficient is by following first
Formula calculates gained：The coefficient of temperature drop calculates gained by following second formula：Wherein, R0The internal resistance value for being the motor at 0 DEG C, c is the specific heat capacity of the motor, m
For the quality of the motor, μ is the surface coefficient of heat transfer of the motor, and △ t are the systematic sampling time.
9. acquisition device as claimed in claim 8, which is characterized in that first computing module includes：
Acquiring unit, the acquiring unit are used to obtain the model of the motor；
Searching unit, the searching unit for searching corresponding with the model internal resistance value, in advance in the preset database
If systematic sampling time, default heating coefficient and default coefficient of temperature drop；
First computing unit, first computing unit are used for according to the internal resistance value, the predetermined system sampling time, described
Default heating coefficient, the default coefficient of temperature drop, first formula and second formula calculate the specific heat capacity and described
The product of quality and the surface coefficient of heat transfer；With
Second computing unit, second computing unit are used for according to the systematic sampling time, first formula and described
Second formula calculates the heating coefficient and the coefficient of temperature drop.
10. acquisition device as claimed in claim 7, which is characterized in that the warming temperature is calculated according to following third formula
Gained：Theating=(U-Ktω)2(1+0.00426Ti-1)Cheating, the cooling temperature is according to following 4th formula calculating institute
：Tcooling=(Ti-1-Te)Ccooling, wherein TheatingFor the warming temperature, U is the supply voltage, KtFor torque system
Number, ω are the motor speed, Ti-1For the winding temperature of the previous moment, CheatingFor the heating coefficient TcoolingFor institute
State cooling temperature, TeFor the environment temperature, CcoolingFor the coefficient of temperature drop.
11. acquisition device as claimed in claim 7, which is characterized in that the 4th computing module for will be described previous when
The winding temperature at quarter subtracts winding temperature of the temperature as the current time after the cooling temperature plus the warming temperature
Degree.
12. acquisition device as claimed in claim 7, which is characterized in that the 4th computing module includes：
Judging unit, the judging unit is for judging whether the motor is in operating status；
Third computing unit, the third computing unit is used for when the motor is in operating status, by the previous moment
Winding temperature and the warming temperature and winding temperature that value is as the current time；With
For when the motor is in halted state, by the difference of the winding temperature of the previous moment and the cooling temperature
Winding temperature as the current time.
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| CN108458812B (en) | 2020-11-17 |
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