CN106404208B - A kind of method detecting electromotor winding temperature and the equipment comprising motor - Google Patents
A kind of method detecting electromotor winding temperature and the equipment comprising motor Download PDFInfo
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- CN106404208B CN106404208B CN201610808947.4A CN201610808947A CN106404208B CN 106404208 B CN106404208 B CN 106404208B CN 201610808947 A CN201610808947 A CN 201610808947A CN 106404208 B CN106404208 B CN 106404208B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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Abstract
The present invention relates to motor temperature detection techniques, and it discloses a kind of methods for detecting electromotor winding temperature, to solve the problems, such as that the temperature accuracy in traditional technology using temperature sensor detection comprising motor in the equipment of motor is poor.This method comprises: determining at least one change rate in the equipment comprising motor, at least one described change rate includes the corresponding variation rate of magnetic flux of motor and/or resistance change rate；Based at least one described change rate, the operating temperature of the motor is determined.In addition, the present invention also provides given a kind of equipment comprising motor.The present invention determines the temperature of motor interior according to variation rate of magnetic flux and resistance change rate, and test result is more accurate relative to temperature sensor, and due to not needing setting temperature sensor, also reduce the cost of the equipment comprising motor.
Description
Technical field
The present invention relates to motor temperature detection techniques, and in particular to it is a kind of detect electromotor winding temperature method and comprising
The equipment of motor.
Background technique
With the development of science and technology more and more electronic products come into daily life, improve the life of people
Quality living.Wherein, air-conditioning be can be to the equipment that the temperature of air, degree of purity, air velocity etc. are adjusted in enclosure space.
Air-conditioning sucks the refrigerant gas of low-temp low-pressure by compressor (compressor) from air intake duct, is driven by motor operation
After piston compresses it, to the refrigerant gas of exhaust pipe discharge high temperature and pressure, power is provided for refrigeration cycle.
In compressor electric motor work, for high current by making motor itself constantly generate heat, motor radiating relies primarily on refrigeration
Agent cools down.Under bad working environments, if can not compressor inside winding temperature be detected and be monitored.Winding temperature mistake
Height will lead to motor failure of insulation, and for DC brushless motor, as the temperature rises can make the demagnetization of certain permanent-magnet materials
Electric current becomes smaller, once appearance situations such as lead to compressor step-out, makes permanent magnet demagnetize, leads to entire compressor operation efficiency
Decline is directly scrapped.
Due to the limitation of DC frequency-changeable compressor internal work environment, temperature sensing can not be used directly inside compressor
Device can be in the external fixed temperature sensor of exhaust pipe and compressor top temperature generally for the normal work for guaranteeing compressor
Protective switch is spent, is controlled using delivery temperature as to compressor internal temperature, so that motor is in the ring of reliably working
In the temperature range of border.But in the case where some more special (such as: refrigeration system lacks fluorine), motor amount of heat can not pass through system
Cryogen is taken away, and causes motor internal temperature very high, and refrigeration system, which lacks refrigerant, makes flow very little, and refrigerant is easy to be cooled
Get off, keep delivery temperature again not high, in this case, the temperature of temperature sensor detection is not practical temperature inside compressor
Degree, to can not control effectively to compressor internal temperature, is very easy to lead to motor failure, makes entire DC frequency-changing system
Cooling system is unable to reliability service.
Therefore, the temperature accuracy in traditional technology using temperature sensor detection comprising motor in the equipment of motor
It is poor, it is not able to satisfy under meaning operating condition in office and temperature controlled demand is carried out to motor.
Summary of the invention
The embodiment of the present invention proposes a kind of method for detecting electromotor winding temperature and the equipment comprising motor, to solve
Problem in traditional technology using temperature sensor detection comprising the temperature accuracy difference of motor in the equipment of motor.
On the one hand, the embodiment of the present invention provides a kind of method for detecting electromotor winding temperature comprising:
Determine at least one change rate in the equipment comprising motor, at least one described change rate includes motor pair
The variation rate of magnetic flux and/or resistance change rate answered；
Based at least one described change rate, the operating temperature of the motor is determined.
Optionally, the determination includes at least one change rate in the equipment of motor, comprising:
Determine the operating magnetic flux parameter of motor and operating resistance parameter in the equipment comprising motor；
The variation rate of magnetic flux is obtained based on the ratio between the operating magnetic flux parameter and initial magnetic flux amount parameter；
The resistance change rate is determined based on the ratio between the operating resistance parameter and initial resistance parameter.
Optionally, the ratio based between the operating real-time magnetic traffic parameter and initial magnetic flux amount parameter obtains institute
The algorithmic formula for stating variation rate of magnetic flux is as follows:
The ratio based between the operating real time resistance parameter and initial resistance parameter determines the resistance variations
The algorithmic formula of rate is as follows:
Wherein, φm0For initial magnetic flux amount parameter, φmTo operate real-time magnetic traffic parameter, r0For initial resistance parameter, r is
Real time resistance parameter is operated, w is motor speed, and i is the motor current of detection, and a, b are the fixed coefficient of ratio, KTFor temperature
Spend variation coefficient.
Optionally, the operating real-time magnetic traffic parameter passes through measurement motor current and calculates acquisition, and the operating is real
When resistance parameter obtained by the resistance value that megameter or multimeter measure motor；
The initial magnetic flux amount parameter and initial resistance parameter are obtained by the label parameters on motor.
Optionally, described based at least one described change rate, the method for determining the operating temperature of the motor includes:
The operating temperature of the motor is determined based on resistance change rate:
Temperature-coefficient of electrical resistance is indicated with TCR, then is had:
TCR=(r-r0)*ΔT/r0
That is TCR=(r/r0-1) * Δ T
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, and r/r0 is resistance
Change rate acquires motor operation temperature T according to the formula.
Optionally, described based at least one described change rate, the method for determining the operating temperature of the motor includes:
The operating temperature of the motor is determined based on variation rate of magnetic flux:
Magnetic flux temperature coefficient is indicated with TCF, then is had:
TCF=(φm-φm0)*ΔT/φm0；
That is TCF=(φm/φm0-1)*ΔT
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, and r/r0 is resistance
Change rate acquires motor operation temperature T according to the formula.
Optionally, described based at least one described change rate, the method for determining the operating temperature of the motor includes:
Determine the operating temperature of the motor jointly based on resistance change rate and variation rate of magnetic flux:
Motor operation temperature=(operating temperature based on the motor that resistance change rate acquires+it is based on magnetic flux change
The operating temperature for the motor that rate acquires)/2.
Optionally, described that the operating temperature of the motor is determined based at least one described change rate, including
Obtain the real-time rotary speed parameter of the motor operation；
Based at least one described change rate and the rotary speed parameter, the operating real time temperature of the motor is determined.
Optionally, described based at least one described change rate and the rotary speed parameter, determine the operating of the motor
Real time temperature, comprising:
If it is determined that the rotary speed parameter is in first range of speeds, then based on corresponding between resistance change rate and temperature
Relationship determines the operating real time temperature of the motor；And
If it is determined that the rotary speed parameter is in second range of speeds, then based between the variation rate of magnetic flux and temperature
Corresponding relationship, determine the operating real time temperature of the motor；
The maximum value of first range of speeds is less than the minimum value of second range of speeds.
Optionally, after determining at least one change rate in the equipment comprising motor, the method also includes:
Based at least one described change rate, the corresponding angular error of the motor is determined；
Angle compensation is carried out to the motor based on the angular error.
Second aspect, the embodiment of the present invention provide a kind of equipment comprising motor comprising:
First determining module, for determine comprising motor equipment at least one change rate, it is described at least one
Change rate includes the corresponding variation rate of magnetic flux of motor and/or resistance change rate；
Second determining module, for determining the operating temperature of the motor based at least one described change rate.
Optionally, first determining module is used for:
Determine the operating magnetic flux parameter of motor and operating resistance parameter in the equipment comprising motor；
The variation rate of magnetic flux is obtained based on the ratio between the operating magnetic flux parameter and initial magnetic flux amount parameter；
The resistance change rate is determined based on the ratio between the operating resistance parameter and initial resistance parameter.
Optionally, the equipment comprising motor further include:
Module is obtained, for obtaining the rotary speed parameter of the motor operation；
Second determining module is used to determine described electronic based at least one described change rate and the rotary speed parameter
The operating real time temperature of machine.
Optionally, second determining module is used for:
If it is determined that the rotary speed parameter is in first range of speeds, based on the corresponding pass between resistance change rate and temperature
System, determines the operating real time temperature of the motor；And
If it is determined that the rotary speed parameter is in second range of speeds, based between the variation rate of magnetic flux and temperature
Corresponding relationship, determines the operating real time temperature of the motor, and the maximum value of first range of speeds is less than described second turn
The minimum value of fast range.
Optionally, the equipment comprising motor further include:
Third determining module, for being based on institute after determining at least one change rate in the equipment comprising motor
At least one change rate is stated, determines the corresponding angular error of the motor；
Compensating module, for carrying out angle compensation to the motor based on the angular error.
In the embodiment of the present invention, by determining at least one change in the equipment comprising motor during operation of air conditioner
Rate, at least one change rate include the corresponding variation rate of magnetic flux of motor and/or resistance change rate, thus based at least
One change rate can determine the operating real time temperature of motor.And magnetic flux and resistance are workpiece phase in motor
The parameter of pass, therefore the temperature conditions of motor interior more can be intuitively reflected by the change rate of magnetic flux and resistance,
So that test result, closer to true value, test result is more accurate.
Simultaneously as can determine the temperature of motor interior according to variation rate of magnetic flux and resistance change rate, thus nothing
Temperature sensor need to be set, the cost of the equipment comprising motor is reduced.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced:
Fig. 1 is the flow chart that the method for electromotor winding temperature is detected in the embodiment of the present invention；
Fig. 2 is the structural block diagram of the equipment in the embodiment of the present invention comprising motor.
Specific embodiment
The embodiment of the present invention is intended to provide a kind of method for detecting electromotor winding temperature and the equipment comprising motor, uses
In the technology that the accuracy for solving the temperature of motor interior in the equipment for the use of temperature sensor detection including motor is poor
Problem.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment only
It is a part of the embodiment of the present invention, the protection scope being not intended to restrict the invention.It describes based on the embodiments of the present invention, this
Equivalent replacement/improvement that field those of ordinary skill makes in the case where not departing from true spirit, belongs to protection of the present invention
Range.
In the embodiment of the present invention, the equipment comprising motor can be intelligent air condition, as intelligent frequency-conversion air-conditioning or fixed frequency are empty
Adjust etc., it can be to corresponding environment space (parlor, bedroom in such as family or the office in office building, dining room etc.)
Air themperature be adjusted, such as adjust temperature, the humidity of air, the embodiment of the present invention is not specifically limited this.
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing:
As shown in Figure 1, the embodiment of the present invention provides a kind of method for detecting electromotor winding temperature, it is applied to comprising electronic
The process of the equipment of machine, this method can be described as follows:
S11: at least one change rate in the equipment comprising motor is determined, at least one change rate includes motor pair
The variation rate of magnetic flux and/or resistance change rate answered.
In the embodiment of the present invention, the equipment comprising motor during the work time, such as is freezed or is heated, and compressor passes through
Motor drive works.Wherein, motor is the one kind that can be realized electric energy conversion or transmitting according to the law of electromagnetic induction
Calutron, its main function is to generate driving torque, as with power source.Optionally, electric in the equipment comprising motor
Motivation can be permanent magnet synchronous DC brushless motor or other types motor, the present invention are not specifically limited this.
Optionally, in step s 11, the method for determining at least one change rate, which may is that, to be determined comprising motor
The operating magnetic flux parameter of motor and operating resistance parameter in equipment, based on operating magnetic flux parameter and initial magnetic flux amount parameter
Between ratio obtain variation rate of magnetic flux, based on operating resistance parameter and initial resistance parameter between ratio determine resistance become
Rate.
In practical applications, the rotary power of ac motor relies primarily on alternating current and establishes rotary magnetic in the stator
, the stator winding of usual threephase motor passes through the electric current for mutually differing 120 ° (electrical angle) respectively, it can obtains rotary magnetic
.The coil (such as copper coil) of the rotor of motor can generate magnetic field after being powered, and interact and rotate with magnetic field stator.
The operating resistance parameter of motor can be obtained by test in equipment comprising motor, such as can pass through million
The resistance value of Europe table or multimeter measurement motor, alternatively, the resistance parameter of motor can also be determined by calculation.
For example, can be calculated using with resistivity formula, i.e. R=ρ (L/S), wherein R represents the resistance of conducting wire, and unit is
Ohm, ρ represent the resistivity of conductor, and unit is ohmcm, and L represents the length of conducting wire, and unit is centimetre that S represents conducting wire
Sectional area, unit is square centimeter.And the calculating of the length (L) of conducting wire are as follows: the every slot coil number * of the perimeter * of motor winding
Every group of coil number.
Since resistivity is usually related to temperature, in compressor operation, resistance may be in motor
The variation of temperature and change.For thermal resistor, the typical feature of thermal resistor is to temperature
Degree is sensitive, and different resistance values is shown at a temperature of different.It includes positive temperature coefficient thermistor (PTC) and negative temperature
Coefficient thermal resistor (NTC), wherein positive temperature coefficient thermistor (PTC) resistance value when temperature is higher is bigger, subzero temperature
It is lower to spend coefficient thermal resistor (NTC) resistance value when temperature is higher.Therefore the operating electricity of motor can be obtained with real-time detection
Hinder parameter.
Optionally, operating magnetic flux can be according to relevant parameter calculate and determine.By foregoing teachings it is found that magnetic flux
Amount is directly proportional to magnetic induction density B, and magnetic induction density B is directly proportional to electric current, so, magnetic flux is just directly proportional to electric current,
Therefore in practical applications, the operating magnetic flux parameter of motor can be determined by measurement motor current.It is electronic measuring
When the electric current of machine, it can be and determined using single resistance or more resistor current method of samplings or other test methods, the present invention couple
This is not specifically limited.
In practical applications, initial resistance parameter and initial magnetic flux amount parameter can be the mark on the nameplate based on motor
Note determination.For example, B is magnetic flux density (i.e. magnetic induction intensity), unit is tesla (T), should be had on the nameplate of motor
Mark.S is the pole-face product under each pole-face, and S=L τ: wherein L is effective edge lengths of armature coil, and τ is pole span, the two
It measures, should also be marked on the nameplate of motor, then according to above three parameter, so that it may acquire magnetic flux: Φ=BS.Have
Also numerical value can be directly given on nameplate, if magnetic flux is 0.2047Wb, resistance is 3.3 Ω.
After determining operating magnetic flux parameter and initial magnetic flux amount parameter, ratio between the two, i.e. magnetic can be determined
Variations of flux rate.Similarly, according to determining operating resistance parameter and initial resistance parameter, that is, corresponding resistance variations be can determine
Rate.Usually, the parameter can be and sets at once the equipment comprising motor when leaving the factory, and such as initial resistance parameter can
In the range of [0.5 Ω, 25 Ω].
When in practical applications, under normal circumstances, such as room temperature, the ratio of magnetic flux parameter and initial magnetic flux amount parameter is operated
Value, i.e., variation rate of magnetic flux and resistance change rate can be 1, therefore, can get over 1 benchmark as change rate relative to 1 deviation
It is more, then show that variation is also big.
S12: it is based at least one change rate, determines temperature when the operating of the motor is real-time.
In the embodiment of the present invention, since the corresponding variation rate of magnetic flux of motor and resistance change rate have with temperature respectively
Corresponding corresponding relationship.Usually, according to the temperature-coefficient of electrical resistance of equipment in motor, can be changed with temperature caused by
Resistance and magnetic flux variation, to establish the corresponding relationship.
And the corresponding relationship between resistance change rate and temperature is usually related with the attribute of device material.For example, for just
The material of temperature coefficient, when temperature in a certain range when, resistance value will not change, and continue to rise and be more than when temperature
After critical value, then resistance will accordingly increase.
In practical applications, since temperature-coefficient of electrical resistance is fixed value, it can be expressed as TCR, i.e.,
TCR=(r-r0)*ΔT/r0(formula 1)
The formula is deformed, then is had:
TCR=(r/r0- 1) * Δ T (formula 2)
Wherein, r/r0For resistance change rate, it can be calculated and be obtained by formula 5, Δ T represents the variable quantity of temperature, is
The absolute value of the difference of operating temperature and critical-temperature.TCR value can characterize temperature and increase 1 DEG C, the variation of the resistance value of equipment.Example
Such as, for corresponding positive temperature coefficient, temperature is increased, then resistance increases, temperature and resistance direct proportionality, and for negative temperature
For, temperature increases resistance and then reduces, and temperature and resistance are in inversely prroportional relationship.In turn, calculation formula based on above-mentioned TCR can be with
It obtains the proportionate relationship between resistance and temperature, corresponding operating temperature can be calculated.
For example, if critical-temperature is 45 DEG C, the temperature coefficient of device be -0.1 (i.e. temperature is every increases 1 DEG C, and resistance reduces,
And resistance change rate is 0.1), to determine that resistance change rate is 0.7 if testing, relative to 1 deviation of standard value 0.3, i.e. resistance
Become smaller, then based on formula 1 it is found that temperature is proportional with resistance change rate, temperature may improve 7 DEG C, that is, the temperature operated
It is 52 DEG C.
Correspondingly, being also possible to user (such as technical staff) according to reality to relationship between variation rate of magnetic flux and temperature
What test was arranged in advance.Usually, as the temperature increases, magnetic flux can increase accordingly.For example, temperature often increases 1 DEG C,
Magnetic flux then increases by 0.1 (i.e. 10%), etc..Then the change rate based on magnetic flux it can be learnt that temperature situation of change.
In practical applications, magnetic flux temperature coefficient is indicated with TCF, then had:
TCF=(φm-φm0)*ΔT/φm0(formula 3)
Above-mentioned formula is deformed, then is had:
TCF=(φm/φm0- 1) * Δ T (formula 4)
Wherein, φm/φm0For flux change rate, it can be calculated and be obtained by formula 6, Δ T represents the variable quantity of temperature,
For the absolute value of the difference of operating temperature and critical-temperature.Calculation formula based on above-mentioned TCF it can be concluded that magnetic flux and temperature it
Between proportionate relationship, corresponding operating temperature can also be calculated.
For example, temperature threshold value is 40 DEG C, however, it is determined that after temperature is more than critical temperature value, temperature is every to increase 1 DEG C, magnetic flux
Amount increases 0.1, determines that variation rate of magnetic flux is to increase 0.35 if detecting, that is, shows that temperature increases 3.5 DEG C, therefore motor interior
Operating temperature be 43.5 DEG C.
In practical applications, it since the variation of temperature usually can cause the variation of resistance and magnetic flux, therefore can be based on
Two change rates acquire the corresponding temperature of operating times when motor respectively, and then calculate the mean temperature of two gained temperature values
Value, and the operating temperature with regard to the average temperature value as motor interior, to improve the accuracy of calculated result.For example, such as base
In the corresponding relationship of resistance change rate and temperature, the first temperature value determined is 62 DEG C, and is based on variation rate of magnetic flux and temperature
Corresponding relationship, determining second temperature value be 63 DEG C, then by the average value of the two, i.e., 62.5 DEG C are determined as motor interior
Operating temperature.
Usually, the workload of compressor is bigger, and the temperature difference for such as needing to adjust processing is larger, then phase induction motor
Revolving speed also can be faster, and the revolving speed of motor will also result in the influence of the temperature of motor interior.Therefore, before S11, may be used also
To obtain the rotary speed parameter of motor operation, the work which can characterize compressor in the equipment comprising motor is negative
Lotus, then the process of S12 can also be based at least one change rate and rotary speed parameter the operating real time temperature for determining motor
's.
Specifically, when determining the operating temperature of motor based at least one change rate, process may include: true
When determining rotary speed parameter and being in first range of speeds, based on the corresponding relationship between resistance change rate and temperature, motor is determined
Operating real time temperature；And when determining that rotary speed parameter is in second range of speeds, based between variation rate of magnetic flux and temperature
Corresponding relationship, determine the operating real time temperature of motor, the maximum value of first range of speeds is most less than second range of speeds
Small value.
I.e. according to the revolving speed of motor, it can choose and temperature is pushed away come counter based on corresponding variable quantity, to realize to electronic
The accurate detection of the internal temperature of machine.
In present example example, based on the corresponding relation between parameter, at least one change rate can be expressed as follows,
In, variation rate of magnetic flux can be indicated with formula 5, and resistance change rate can be indicated with formula 6, it may be assumed that
Wherein, φm0For initial magnetic flux amount parameter, φmTo operate real-time magnetic traffic parameter, r0For initial resistance parameter, r is
Real time resistance parameter is operated, w is motor speed, and i is the motor current of detection, and a, b are the fixed coefficient of ratio, KTFor temperature
Spend variation coefficient.
In practical applications, when motor speed is smaller, temperature coefficient is and larger in revolving speed mainly by Resistance Influence
When, resistance parameter influence is smaller, and temperature coefficient is mainly influenced by magnetic flux parameter.
In the embodiment of the present invention, first range of speeds can be low-speed running range, such as can be (0,200rad/s),
Second range of speeds can be high speed operating range, such as can be (200rad/s, 450rad/s], etc., this field skill
Art personnel can be configured according to the actual situation, and the embodiment of the present invention is not specifically limited this.
It optionally, then can be based on the corresponding relationship between resistance change rate and temperature come really in first range of speeds
Determine the operating temperature of motor.I.e. at the low rotational speed, running parameter relevant to temperature is mainly resistance, then can pass through detection
And resistance change rate is calculated, and then determine corresponding temperature, and determining temperature will be calculated as the corresponding temperature of motor interior
Degree.
For example, being in first range of speeds, equipment in motor if the revolving speed of detection motor operation is less than 200rad/s
Temperature coefficient be -0.75, if through detect determine resistance change rate be reduce 0.3 (i.e. 30%), the temperature residual quantity of corresponding change
It is 4 DEG C, if temperature threshold value is 70 DEG C, the real-time temperature of motor operation is 74 DEG C.
Similarly, however, it is determined that the revolving speed of motor is larger, such as larger than 200rad/s or other critical values, then motor operation
Temperature and the correlation of variation rate of magnetic flux are bigger.At this point it is possible to the change rate for only needing to detect magnetic flux can calculate it is electronic
Temperature inside machine, for example, if calculating resulting temperature is 78 according to the corresponding relationship between variation rate of magnetic flux and temperature
DEG C, it can be using the temperature as the operating real time temperature of motor interior.
In practical applications, since the stator of motor, rotor windings are all the insulation copper materials for using certain class of insulation
Or made of copper wire.For the class of insulation according to the difference of insulating materials, the maximum temperature value that work allows is that have certain limitation
(such as B-class insulation be 130 degree degrees Celsius).If temperature is more than specified value, the performance of insulating materials will degenerate, and accelerate insulation
Aging finally can also make insulation breakdown and burn, even result in burning for motor.Therefore, by motor interior temperature
Accurate detection, be conducive in real time be monitored the temperature of electrode interior, to avoid its temperature excessively high, guarantee that its normal is transported
Row.
Optionally, it in the embodiment of the present invention, is also based at least one change rate and determines the corresponding angle of motor
Error, and then angle compensation is carried out to motor based on angular error.For example, when determining angle lag, it can be based on lag
Angle, such as 40 °, then can control more 40 ° of rotations on the basis of being rotated by 360 ° of the rotor of motor.Correspondingly, if it is determined that
The angle of motor is forward, then can control motor rotor and rotate respective angles less, to realize angle compensation.
As shown in Fig. 2, the equipment in the embodiment of the present invention comprising motor includes the first determining module 201 and the second module
202。
First determining module 201 is determined at least one change rate in the equipment comprising motor, it is described extremely
A few change rate includes the corresponding variation rate of magnetic flux of motor and/or resistance change rate.
Second determining module 202 can be used for determining that the operating of the motor is real based at least one described change rate
Shi Wendu.
Specifically, the first determining module 201 can be used for: determining the operating of motor in the equipment comprising motor
Real-time magnetic traffic parameter and operating resistance parameter；Based on the ratio between the operating magnetic flux parameter and initial magnetic flux amount parameter
Obtain the variation rate of magnetic flux；The resistance is determined based on the ratio between the operating resistance parameter and initial resistance parameter
Change rate.
Optionally, the equipment comprising motor further include:
Module is obtained, for obtaining the real-time rotary speed parameter of the motor operation；
Second determining module 202 is used for based at least one described change rate and the rotary speed parameter, determine described in
The operating real time temperature of motor.
Optionally, second determining module 202 can be used for:
If it is determined that the rotary speed parameter is in first range of speeds, based on the corresponding pass between resistance change rate and temperature
System, determines the operating temperature of the motor；And
If it is determined that the rotary speed parameter is in second range of speeds, based between the variation rate of magnetic flux and temperature
Corresponding relationship, determines the operating real time temperature of the motor, and the maximum value of first range of speeds is less than described second turn
The minimum value of fast range.
Optionally, the equipment comprising motor further includes third determining module and compensating module, wherein third determines
Module is used for after determining at least one change rate in the equipment comprising motor, at least one change rate based on described in,
Determine the corresponding angular error of the motor；Compensating module, for carrying out angle to the motor based on the angular error
Degree compensation.
In the embodiment of the present invention, by determining at least one variation in the equipment comprising motor during operation of air conditioner
Rate, which includes the corresponding variation rate of magnetic flux of motor and/or resistance change rate, to be based at least one
A change rate can determine the operating temperature of motor.And magnetic flux and resistance are the relevant ginseng of workpiece in motor
Number, therefore the temperature conditions of motor interior more can be intuitively reflected by the change rate of magnetic flux and resistance, so that surveying
For test result closer to true value, test result is more accurate.
Simultaneously as can determine the temperature of motor interior according to variation rate of magnetic flux and resistance change rate, before this by
In that can not know motor interior true temperature, extreme case minimum value generally is used to direct current compressor motor protection, this
The range that motor can be run is constrained significantly, and motor protection value can be made by obtaining motor running internal temperature in real time
Become a function relevant to temperature, this has widened frequency-changeable compressor use scope significantly, and makes convertible frequency air-conditioner operation more
Add reliable.
Claims (12)
1. a kind of method for detecting electromotor winding temperature characterized by comprising
Determine at least one change rate in the equipment comprising motor, at least one described change rate includes that motor is corresponding
Variation rate of magnetic flux and resistance change rate；
Based at least one described change rate, the operating temperature of the motor is determined；
When determining resistance change rate, it is first determined operating real time resistance parameter is then based on the operating real time resistance parameter
Ratio between initial resistance parameter determines the resistance change rate；The operating real time resistance parameter passes through megameter or ten thousand
It is obtained with the resistance value of table measurement motor, or is calculated by resistivity formula and determine the operating real time resistance parameter；Initially
Resistance parameter is obtained by the label parameters on motor；
When determining variation rate of magnetic flux, it is first determined the real-time magnetic flux of operating of motor in the equipment comprising motor
Parameter；The ratio being then based between the operating real-time magnetic traffic parameter and initial magnetic flux amount parameter obtains the magnetic flux quantitative change
Rate；
The ratio based between the operating real-time magnetic traffic parameter and initial magnetic flux amount parameter obtains the magnetic flux quantitative change
The algorithmic formula of rate is as follows:
The ratio based between the operating real time resistance parameter and initial resistance parameter determines the resistance change rate
Algorithmic formula is as follows:
Wherein, φm0For initial magnetic flux amount parameter, φmTo operate real-time magnetic traffic parameter, r0For initial resistance parameter, r is operating
Real time resistance parameter, w are motor speed, and i is the motor current of detection, and a, b are the fixed coefficient of ratio, KTFor temperature change
Change coefficient；
Described at least one change rate based on described in, the method for determining the operating temperature of the motor include:
The operating temperature of the motor is determined based on variation rate of magnetic flux:
Magnetic flux temperature coefficient is indicated with TCF, then is had:
TCF=(φm-φm0)*ΔT/φm0；
That is TCF=(φm/φm0-1)*ΔT；
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, φm/φm0For magnetic flux change
Rate.
2. the method as described in claim 1, which is characterized in that
The operating real-time magnetic traffic parameter is by measurement motor current and calculates acquisition；
The initial magnetic flux amount parameter is obtained by the label parameters on motor.
3. the method as described in claim 1, which is characterized in that
Described at least one change rate based on described in, the method for determining the operating temperature of the motor include:
Determine the operating temperature of the motor jointly based on resistance change rate and variation rate of magnetic flux:
Motor operation temperature=(operating temperature of the motor acquired based on resistance change rate+it is asked based on variation rate of magnetic flux
The operating temperature of the motor obtained)/2；
Wherein, the method for the operating temperature of the motor is determined based on resistance change rate are as follows:
Temperature-coefficient of electrical resistance is indicated with TCR, then is had:
TCR=(r-r0)*ΔT/r0；
That is TCR=(r/r0-1) * Δ T
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, and r/r0 is resistance variations
Rate.
4. the method as described in claim 1, which is characterized in that
Described at least one change rate based on described in, determines the operating temperature of the motor, specifically includes:
Obtain the rotary speed parameter of the motor operation；
Based at least one described change rate and the rotary speed parameter, the operating real time temperature of the motor is determined.
5. method as claimed in claim 4, which is characterized in that
It is described that the operating real time temperature of the motor is determined based at least one described change rate and the rotary speed parameter, it wraps
It includes:
If it is determined that the rotary speed parameter is in first range of speeds, then based on the corresponding pass between resistance change rate and temperature
System, determines the operating real time temperature of the motor；
If it is determined that the rotary speed parameter is in second range of speeds, then based on pair between the variation rate of magnetic flux and temperature
It should be related to, determine the operating real time temperature of the motor；
The maximum value of first range of speeds is less than the minimum value of second range of speeds.
6. the method according to claim 1 to 5, which is characterized in that
After determining at least one change rate in the equipment comprising motor, the method also includes:
Based at least one described change rate, the corresponding angular error of the motor is determined；
Angle compensation is carried out to the motor based on the angular error.
7. a kind of equipment comprising motor characterized by comprising
First determining module, for determining at least one change rate in the equipment comprising motor, at least one described variation
Rate includes the corresponding variation rate of magnetic flux of motor and resistance change rate；When determining resistance change rate, it is first determined operating is real
When resistance parameter, the ratio being then based between the operating real time resistance parameter and initial resistance parameter determines that the resistance becomes
Rate；The operating real time resistance parameter is obtained by the resistance value that megameter or multimeter measure motor；Initial resistance parameter
It is obtained by the label parameters on motor；When determining variation rate of magnetic flux, it is first determined the equipment comprising motor
The operating real-time magnetic traffic parameter of middle motor；Be then based on the operating real-time magnetic traffic parameter and initial magnetic flux amount parameter it
Between ratio obtain the variation rate of magnetic flux；
The ratio based between the operating real-time magnetic traffic parameter and initial magnetic flux amount parameter obtains the magnetic flux quantitative change
The algorithmic formula of rate is as follows:
The ratio based between the operating real time resistance parameter and initial resistance parameter determines the resistance change rate
Algorithmic formula is as follows:
Wherein, φm0For initial magnetic flux amount parameter, φmTo operate real-time magnetic traffic parameter, r0For initial resistance parameter, r is operating
Real time resistance parameter, w are motor speed, and i is the motor current of detection, and a, b are the fixed coefficient of ratio, KTFor temperature change
Change coefficient；
Second determining module, for determining the operating temperature of the motor based at least one described change rate；
Described at least one change rate based on described in, the method for determining the operating temperature of the motor include:
The operating temperature of the motor is determined based on variation rate of magnetic flux:
Magnetic flux temperature coefficient is indicated with TCF, then is had:
TCF=(φm-φm0)*ΔT/φm0；
That is TCF=(φm/φm0-1)*ΔT
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, φm/φm0For magnetic flux change
Rate.
8. as claimed in claim 7 including the equipment of motor, which is characterized in that
The operating real-time magnetic traffic parameter is by measurement motor current and calculates acquisition；
The initial magnetic flux amount parameter is obtained by the label parameters on motor.
9. as claimed in claim 7 including the equipment of motor, which is characterized in that
Described at least one change rate based on described in, the method for determining the operating temperature of the motor include:
Determine the operating temperature of the motor jointly based on resistance change rate and variation rate of magnetic flux:
Motor operation temperature=(operating temperature of the motor acquired based on resistance change rate+it is asked based on variation rate of magnetic flux
The operating temperature of the motor obtained)/2；
Wherein, the method for the operating temperature of the motor is determined based on resistance change rate are as follows:
Temperature-coefficient of electrical resistance is indicated with TCR, then is had:
TCR=(r-r0)*ΔT/r0；
That is TCR=(r/r0-1) * Δ T
Wherein, Δ T=| T-T0 |, T0 is known zero boundary temperature value, and T is the operating temperature of motor, and r/r0 is resistance variations
Rate.
10. as claimed in claim 7 including the equipment of motor, which is characterized in that
The equipment comprising motor further include:
Module is obtained, for obtaining the real-time rotary speed parameter of the motor operation；
Second determining module is used to determine the motor based at least one described change rate and the rotary speed parameter
Operate real time temperature.
11. as claimed in claim 10 including the equipment of motor, which is characterized in that
Second determining module is used for:
If it is determined that the rotary speed parameter is in first range of speeds, based on the corresponding relationship between resistance change rate and temperature,
Determine the operating real time temperature of the motor；
If it is determined that the rotary speed parameter is in second range of speeds, based on corresponding between the variation rate of magnetic flux and temperature
Relationship determines the operating real time temperature of the motor；
The maximum value of first range of speeds is less than the minimum value of second range of speeds.
12. such as the described in any item equipment comprising motor of claim 7-11, which is characterized in that
The equipment comprising motor further include:
Third determining module, for after determining at least one change rate in the equipment comprising motor, based on it is described extremely
A few change rate, determines the corresponding angular error of the motor；
Compensating module, for carrying out angle compensation to the motor based on the angular error.
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| CN201610808947.4A CN106404208B (en) | 2016-09-08 | 2016-09-08 | A kind of method detecting electromotor winding temperature and the equipment comprising motor |
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| CN201610808947.4A CN106404208B (en) | 2016-09-08 | 2016-09-08 | A kind of method detecting electromotor winding temperature and the equipment comprising motor |
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| CN107479367B (en) * | 2017-04-27 | 2021-05-14 | 宝沃汽车（中国）有限公司 | Motor control method and system and vehicle |
| CN107504732B (en) * | 2017-08-31 | 2020-04-28 | 四川长虹电器股份有限公司 | Method and device for judging quantity of refrigerant in refrigeration system |
| CN107631527B (en) * | 2017-09-04 | 2023-12-22 | 四川长虹空调有限公司 | Method and system for detecting whether variable-frequency refrigeration equipment lacks refrigerant |
| CN107659066A (en) * | 2017-10-31 | 2018-02-02 | 四川长虹空调有限公司 | A kind of motor module and its control method |
| CN108712136B (en) * | 2018-04-27 | 2020-12-04 | 广州市香港科大霍英东研究院 | Temperature rise prediction and protection method, system and device for permanent magnet synchronous motor |
| CN108803753B (en) * | 2018-07-26 | 2021-03-02 | 合肥云联电子科技有限公司 | Intelligent regulation and control system for internal environment of industrial control equipment |
| CN109631228B (en) * | 2019-01-31 | 2020-07-28 | 四川长虹空调有限公司 | Method and system for judging rapid leakage of refrigerant of refrigeration system |
| CN109764977B (en) * | 2019-03-13 | 2020-12-01 | 四川长虹空调有限公司 | Method for detecting temperature of motor winding of compressor |
| CN112994575B (en) * | 2019-12-17 | 2023-01-31 | 青岛海尔空调电子有限公司 | Winding temperature determination method and starting method of three-phase compressor and air conditioner |
| CN111237977B (en) * | 2020-01-15 | 2021-11-26 | 四川长虹空调有限公司 | Refrigerant fluorine-deficient state self-checking method and air conditioner |
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Application publication date: 20170215 Assignee: DALIAN XINMINGHUA ELECTRONIC TECHNOLOGY Co.,Ltd. Assignor: QINGDAO SANYUAN TE ELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2021510000044 Denomination of invention: The invention relates to a method for detecting motor winding temperature and a device comprising a motor Granted publication date: 20191115 License type: Common License Record date: 20210930 Application publication date: 20170215 Assignee: CHANGHONG MEILING Co.,Ltd. Assignor: Sichuan Changhong Air Conditioning Co.,Ltd. Contract record no.: X2021510000045 Denomination of invention: The invention relates to a method for detecting motor winding temperature and a device comprising a motor Granted publication date: 20191115 License type: Common License Record date: 20210930 |
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