CN110265974A - Temperature checking method and device - Google Patents
Temperature checking method and device Download PDFInfo
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- CN110265974A CN110265974A CN201910582468.9A CN201910582468A CN110265974A CN 110265974 A CN110265974 A CN 110265974A CN 201910582468 A CN201910582468 A CN 201910582468A CN 110265974 A CN110265974 A CN 110265974A
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- igbt module
- phase igbt
- temperature
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- General Physics & Mathematics (AREA)
- Control Of Ac Motors In General (AREA)
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Abstract
This application discloses a kind of temperature checking method and devices, comprising: obtains the temperature of three-phase IGBT module；Wherein, three-phase IGBT module includes: the A phase IGBT module nearest from motor water inlet, the C phase IGBT module nearest from motor water outlet, and the B phase IGBT module between A phase IGBT module and C phase IGBT module；If the temperature of three-phase IGBT module meets motor normal running (operation) conditions, judge whether the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature difference threshold；If judging, the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature difference threshold, takes the first safeguard measure to motor；Wherein, the first safeguard measure for reducing motor operation.Since the application has the temperature gap to any two-phase IGBT module of three-phase IGBT module to be detected in the case where motor operates normally, the protection efficiency to three-phase IGBT module is improved.
Description
Technical field
The present invention relates to field of electromechanical technology more particularly to a kind of temperature checking methods and device.
Background technique
Electric machine controller be controlled by active motor according to the direction of setting, speed, angle, the response time into
The integrated circuit of row work is applied to the multiple fields such as automobile, household electrical appliances.Insulated gate bipolar transistor (Insulated Gate
Bipolar Transistor, IGBT) module be electric machine controller nucleus module, in order to guarantee electric machine controller stablize work
Make, the temperature to three-phase IGBT module is needed to detect, to realize the protection to three-phase IGBT module.
In the prior art, when motor operates normally, the temperature checking method of three-phase IGBT module usually passes through sampling three
The three-phase IGBT module temperature of sampling is compared with preset temperature, if sample temperature is big by the temperature of phase IGBT module respectively
Safeguard measure is then taken in preset temperature.However, in actual conditions, even if three-phase IGBT module temperature is lower than preset temperature, but
When the temperature gap of any two-phase IGBT module of three-phase IGBT module is larger, three-phase IGBT module is also at abnormal work in fact
Make under state.Therefore, the temperature checking method of existing three-phase IGBT module is not high to the protection efficiency of three-phase IGBT module, can
It is lower by property.
Summary of the invention
Based on above-mentioned the deficiencies in the prior art, present applicant proposes a kind of temperature checking method and devices, are improved with realizing
To the protection efficiency of three-phase IGBT module.
To achieve the goals above, it is proposed that scheme it is as follows:
First aspect present invention discloses a kind of temperature checking method, comprising:
Obtain the temperature of three-phase IGBT module；Wherein, the three-phase IGBT module includes: the A nearest from motor water inlet
Phase IGBT module, the C phase IGBT module nearest from the motor water outlet, and it is located at the A phase IGBT module and the C phase
B phase IGBT module between IGBT module；
If the temperature of the three-phase IGBT module meets motor normal running (operation) conditions, the temperature of the three-phase IGBT module is judged
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold in degree；Wherein, the motor normal running (operation) conditions
Temperature for the A phase IGBT module is less than the temperature of the B phase IGBT module and the temperature of the B phase IGBT module is less than
The temperature of the C phase IGBT module；
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than the first temperature
Poor threshold value then takes the first safeguard measure to the motor；Wherein, first safeguard measure for reducing the motor fortune
Row.
Optionally, in the above temperature detecting method, if any in the temperature for judging the three-phase IGBT module
The temperature gap of two-phase IGBT module is greater than the first temperature difference threshold, then takes the first safeguard measure to the motor, comprising:
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than described the
One temperature difference threshold and less than the second temperature difference threshold, then by value that the power setting of the motor is less than current power；
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than described the
The torque settings of the motor are then protection threshold value by two temperature difference thresholds.
Optionally, in the above temperature detecting method, further includes:
If the temperature of the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions, the revolving speed of the motor is judged
Whether stall threshold value is greater than；
If judging, the revolving speed of the motor is greater than the stall threshold value, takes first protection to arrange in the motor
It applies；
If judging, the revolving speed of the motor is less than or equal to the stall threshold value, takes the second protection to the motor
Measure；Wherein second safeguard measure is for reducing the operation of the motor or the operation of the stopping three-phase IGBT module.
Optionally, in the above temperature detecting method, if the revolving speed for judging the motor is greater than the stall threshold
When value, then first safeguard measure is taken to the motor, comprising:
If judge that the revolving speed of the motor is greater than the stall threshold value, the temperature of the three-phase IGBT module is judged
Whether the time for being unsatisfactory for the motor normal running (operation) conditions is greater than time threshold；
If judging, the temperature of the three-phase IGBT module is unsatisfactory for the time of the motor normal running (operation) conditions greater than institute
Time threshold is stated, then is the protection threshold value by the torque settings of the motor；
If judge the temperature of the three-phase IGBT module be unsatisfactory for the motor normal running (operation) conditions time be less than or
It is then the value less than current power by the power setting of the motor equal to the time threshold.
Optionally, in the above temperature detecting method, if the revolving speed for judging the motor is less than or equal to described
When stall threshold value, then the second safeguard measure is taken to the motor, comprising:
If judge that the revolving speed of the motor is less than or equal to the stall threshold value, the three-phase IGBT module is judged
Whether the middle maximum phase IGBT module of electric current is the highest phase IGBT module of temperature in the three-phase IGBT module；
If judging, the maximum phase IGBT module of electric current is not in the three-phase IGBT module in the three-phase IGBT module
The highest phase IGBT module of temperature, then take pass protection of pipe to the three-phase IGBT module；
If judging, the maximum phase IGBT module of electric current is the three-phase IGBT module medium temperature in the three-phase IGBT module
Highest phase IGBT module is spent, then judges the maximum phase IGBT module of electric current and an any other phase in the three-phase IGBT module
Whether the temperature gap of IGBT module is greater than third temperature difference threshold；
If judging the maximum phase IGBT module of electric current and any other phase IGBT module in the three-phase IGBT module
Temperature gap be greater than the third temperature difference threshold, then pass protection of pipe is taken to the three-phase IGBT module；
If judging the temperature of electric current maximum phase IGBT module and other two-phase IGBT modules in the three-phase IGBT module
It spends difference to be respectively less than or be equal to the third temperature difference threshold, is then the value less than current power by the power setting of the motor.
Optionally, in the above temperature detecting method, revolving speed, the three-phase of first temperature difference threshold by the motor
The channel flows of the electric current of IGBT module and the motor determine.
Second aspect of the present invention discloses a kind of temperature-detecting device, comprising:
Acquiring unit, for obtaining the temperature of three-phase IGBT module；Wherein, the three-phase IGBT module includes: from motor
The nearest A phase IGBT module of water inlet, the C phase IGBT module nearest from the motor water outlet, and it is located at the A phase IGBT
B phase IGBT module between module and the C phase IGBT module；
First judging unit judges institute if the temperature for the three-phase IGBT module meets motor normal running (operation) conditions
Whether the temperature gap for stating any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature difference threshold；Wherein, institute
State temperature of the temperature less than the B phase IGBT module that motor normal running (operation) conditions is the A phase IGBT module and the B phase
The temperature of IGBT module is less than the temperature of the C phase IGBT module；
First protection location, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature
It spends difference and is greater than the first temperature difference threshold, then the first safeguard measure is taken to the motor；Wherein, first safeguard measure is used for
Reduce the operation of the motor.
Optionally, in above-mentioned temperature-detecting device, first protection location, comprising:
First setup unit, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature
It spends difference and is greater than first temperature difference threshold and less than the second temperature difference threshold, be then less than working as by the power setting of the motor
The value of preceding power；
Second setup unit, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature
It spends difference and is greater than second temperature difference threshold, be then protection threshold value by the torque settings of the motor.
Optionally, in above-mentioned temperature-detecting device, further includes:
Second judgment unit, if the temperature for the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions,
Judge whether the revolving speed of the motor is greater than stall threshold value；
Second protection location, if for judging that the revolving speed of the motor is greater than the stall threshold value, to the motor
Take first safeguard measure；
Third protection location, if for judging that the revolving speed of the motor is less than or equal to the stall threshold value, to institute
It states motor and takes the second safeguard measure；Wherein second safeguard measure for reducing the motor operation or stop described three
The operation of phase IGBT module.
Optionally, in above-mentioned temperature-detecting device, second protection location, comprising:
Third judging unit, if when for judging that the revolving speed of the motor is greater than the stall threshold value, described in judgement
Whether the time that the temperature of three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions is greater than time threshold；
4th setup unit, if being operated normally for judging that the temperature of the three-phase IGBT module is unsatisfactory for the motor
The time of condition is greater than the time threshold, then is the protection threshold value by the torque settings of the motor；
5th setup unit, if being operated normally for judging that the temperature of the three-phase IGBT module is unsatisfactory for the motor
The time of condition is less than or equal to the time threshold, then is the value less than current power by the power setting of the motor.
Optionally, in above-mentioned temperature-detecting device, the third protection location, comprising:
4th judging unit, if sentencing when for judging that the revolving speed of the motor is less than or equal to the stall threshold value
Whether the maximum phase IGBT module of electric current is the highest phase of temperature in the three-phase IGBT module in the three-phase IGBT module of breaking
IGBT module；
6th setup unit, if for judging that the maximum phase IGBT module of electric current is not institute in the three-phase IGBT module
The highest phase IGBT module of temperature in three-phase IGBT module is stated, then pass protection of pipe is taken to the three-phase IGBT module；
5th judging unit, if for judging that the maximum phase IGBT module of electric current is described in the three-phase IGBT module
The highest phase IGBT module of temperature in three-phase IGBT module then judges the maximum phase IGBT mould of electric current in the three-phase IGBT module
Whether block and the temperature gap of any other phase IGBT module are greater than third temperature difference threshold；
7th setup unit, if for judging in the three-phase IGBT module the maximum phase IGBT module of electric current and other
The temperature gap of any one phase IGBT module is greater than the third temperature difference threshold, then takes Guan Guanbao to the three-phase IGBT module
Shield；
8th setup unit, if for judging in the three-phase IGBT module the maximum phase IGBT module of electric current and other
The temperature gap of two-phase IGBT module is respectively less than or is equal to the third temperature difference threshold, then is small by the power setting of the motor
In the value of current power.
Optionally, in above-mentioned temperature-detecting device, revolving speed, the three-phase of first temperature difference threshold by the motor
The channel flows of the electric current of IGBT module and the motor determine.
It can be seen from the above technical scheme that by the temperature for obtaining three-phase IGBT module, it is full in three-phase IGBT module
When sufficient motor normal running (operation) conditions, judge whether the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is big
In the first temperature difference threshold.If the temperature gap of any two-phase in three-phase IGBT module is greater than the first temperature difference threshold, to motor
Take the first safeguard measure.Wherein, three-phase IGBT module includes: the A phase IGBT module nearest from motor water inlet, goes out from motor
The nearest C phase IGBT module in the mouth of a river, and the B phase IGBT module between A phase IGBT module and C phase IGBT module；First
Safeguard measure for reducing motor operation.Compared to the prior art, the application has in the case where motor operates normally to three
The temperature gap of any two-phase IGBT module of phase IGBT module is detected, so that any two in three-phase IGBT module
The temperature gap of phase IGBT module is greater than the first temperature difference threshold, i.e., when three-phase IGBT module is under abnormal working position, just
Safeguard measure is taken to motor, improves the protection efficiency to three-phase IGBT module.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of temperature checking method disclosed by the embodiments of the present invention；
Fig. 2 is the structural schematic diagram of the three-phase IGBT module in the embodiment of the present invention；
Fig. 3 is the flow diagram for the method that a kind of pair of motor disclosed by the embodiments of the present invention executes the first safeguard measure；
Fig. 4 is a kind of structural schematic diagram of temperature-detecting device disclosed by the embodiments of the present invention；
Fig. 5 is the flow diagram of another temperature checking method disclosed by the embodiments of the present invention；
Fig. 6 is the flow diagram for the method that a kind of pair of motor disclosed by the embodiments of the present invention executes the second safeguard measure；
Fig. 7 is that the process of another method that the first safeguard measure is executed to motor disclosed by the embodiments of the present invention is illustrated
Figure；
Fig. 8 is the structural schematic diagram of another temperature-detecting device disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Refering to fig. 1, the embodiment of the present application discloses a kind of temperature checking method, comprising the following steps:
S101, the temperature for obtaining three-phase IGBT module.
Wherein, referring to Fig.2, three-phase IGBT module includes: the A phase IGBT module nearest from motor water inlet, goes out from motor
The nearest C phase IGBT module in the mouth of a river, and the B phase IGBT module between A phase IGBT module and C phase IGBT module.Three-phase
IGBT module is the nucleus module of electric machine controller, and electric machine controller is used to control the motor, and the motor refers to three
Phase motor, its main function is to generate driving torque, as electrical appliance or the power source of various machinery.And it is passed through the motor
Three-phase alternating current be three-phase IGBT module in alternating current.
When executing step S101, temperature, the temperature and C phase of B phase IGBT module of A phase IGBT module are obtained in real time respectively
The temperature of IGBT module, the sequence for obtaining the temperature of three-phase IGBT module do not influence the realization of the embodiment of the present application, can be simultaneously
The temperature for obtaining three-phase IGBT module, can also successively obtain the temperature of three-phase IGBT module according to preset sequence.
Optionally, execute step S101 when in addition to obtain three-phase IGBT module temperature, three-phase IGBT mould can also be obtained
Other parameters value of block, such as current value, the voltage value of three-phase IGBT module etc..The related parameter values of motor can also be obtained,
Such as channel flows, tachometer value of motor of motor etc..By obtaining the parameter in addition to the temperature parameter of three-phase IGBT module
Value can provide more reference standards to the temperature detection of three-phase IGBT module.
S102, judge whether the temperature of three-phase IGBT module meets motor normal running (operation) conditions.
Wherein, motor normal running (operation) conditions are as follows: the temperature of A phase IGBT module is less than the temperature and B phase of B phase IGBT module
The temperature of IGBT module is less than the temperature of C phase IGBT module.Due in the case where motor operates normally, close to motor water inlet
Portion temperature it is minimum, close to motor water outlet portion temperature highest.Therefore when motor operates normally, apart from motor
The nearest A phase IGBT module temperature of water inlet is minimum, the temperature highest of the C phase IGBT module nearest apart from motor water outlet.If
When motor operation is abnormal, the temperature of three-phase IGBT module is just unsatisfactory for that A phase IGBT module temperature is minimum and C phase IGBT module temperature
Spend the sequence of three-phase IGBT module temperature value as highest.
If the temperature of three-phase IGBT module meets motor normal running (operation) conditions, S103 is thened follow the steps, if three-phase IGBT mould
The temperature of block is unsatisfactory for motor normal running (operation) conditions, then terminates the process of temperature detection.It should be noted that terminating temperature detection
It after process, still returns and continues to execute step S101, i.e., the temperature of three-phase IGBT module is obtained in real time, in real time to three-phase IGBT
Module carries out temperature detection protection.
S103, judge whether the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature
Poor threshold value.
Wherein, the first temperature difference threshold is preset value, if any two-phase IGBT mould in the temperature of three-phase IGBT module
The temperature gap of block is greater than the first temperature difference threshold, then the work that represent motor at this time is in dangerous stable state, can be right
The safety of three-phase IGBT module impacts, it is therefore desirable to the first safeguard measure is executed to motor, to reach protection three-phase IGBT
The purpose of module needs to be implemented step S104.If the temperature difference of any two-phase IGBT module in the temperature of three-phase IGBT module
Value is respectively less than the first temperature difference threshold, then it is assumed that the safer stabilization of the working condition of three-phase IGBT module at this time terminates temperature inspection
Flow gauge, return to execute step S101, i.e., in real time obtain three-phase IGBT module temperature, in real time to three-phase IGBT module into
Trip temperature detection protection.
Specifically, when executing step S103, judge that the temperature gap of the temperature and A phase IGBT module of C phase IGBT module is
Whether the temperature gap of the no temperature for being greater than the first temperature difference threshold, judging C phase IGBT module and B phase IGBT module is greater than the first temperature
Poor threshold value and judge whether the temperature gap of the temperature and A phase IGBT module of B phase IGBT module is greater than the first temperature difference threshold.
When executing step S103, three kinds of judgements are performed, wherein the sequencing for executing three kinds of judgements does not influence the embodiment of the present application
Realization, these three judgements can also be performed simultaneously.It should also be noted that, during executing above-mentioned three kinds of judgements, with two-phase
First temperature difference threshold of the temperature gap comparison of IGBT module can be identical value, also can be set to different values.For example,
For first temperature difference threshold of the temperature compared with the temperature gap of B phase IGBT module of C phase IGBT module, can be directed to C phase
First temperature difference threshold of the temperature of IGBT module compared with the temperature gap of A phase IGBT module is identical value, is also possible to not
Identical value.
Optionally, in one specific embodiment of the application, the first temperature difference threshold is by the revolving speed of motor, three-phase IGBT module
The channel flows of electric current and motor determine.For example, judging the temperature gap of the temperature and A phase IGBT module of C phase IGBT module
Whether the first temperature difference threshold is greater than, the first temperature difference threshold at this time is by the revolving speed of motor, the electric current of C phase IGBT module, A phase IGBT
The electric current of module and the channel flows of motor determine.And judge the temperature difference of the temperature and B phase IGBT module of C phase IGBT module
When whether value is greater than the first temperature difference threshold, the first temperature difference threshold at this time is then the electricity of revolving speed by motor, C phase IGBT module
The channel flows of stream, the electric current of B phase IGBT module and motor determine.Therefore, the first temperature difference threshold is compared with it
Phase IGBT module it is current related, the first temperature difference threshold for comparing of the temperature difference with different two-phases is also different.
It should be noted that step S103 is by two-phase any in the temperature of three-phase IGBT module in the embodiment of the present application
The temperature gap of IGBT module is compared with preset first temperature difference threshold, so that any two-phase in three-phase IGBT module
The temperature gap of IGBT module is greater than the first temperature difference threshold, i.e., when the operation of motor is in the state of dangerous stabilization,
Step S104 is executed, i.e., the first safeguard measure is taken to motor.And in the prior art, then it is that the temperature of three-phase IGBT module is straight
It connects and is compared with preset temperature, i.e., the temperature of A phase IGBT module is compared with preset temperature, B phase IGBT mould
The temperature of block is compared with preset temperature and is compared the temperature of C phase IGBT module with preset temperature, without
Detection was carried out to the temperature gap of two-phase IGBT module.Therefore on the basis of existing technology, then using the embodiment of the present application
Temperature checking method, can be further improved the protection efficiency to three-phase IGBT module, increase three-phase IGBT module can
By property.
S104, the first safeguard measure is taken motor.
Wherein, the first safeguard measure for reducing motor operation.It specifically, may include the power for reducing motor, drop
The torque etc. of low motor.When the temperature gap of any two-phase IGFBT module in three-phase IGBT module is greater than the first temperature difference threshold
Value illustrates that motor is in the very fast situation of operation, and since the electric machine controller where three-phase IGBT module is for controlling electricity
Machine, motor operation can comparatively fast impact the safety of three-phase IGBT module, it is therefore desirable to reduce the operation of motor to realize
Play the role of protection to three-phase IGBT module.
Optionally, refering to Fig. 3, in applying for a specific embodiment, a kind of embodiment of step S104 is executed, can wrap
It includes:
S301, judge whether the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature
Poor threshold value and less than the second temperature difference threshold.
Wherein, the second temperature difference threshold is greater than the first temperature difference threshold.The temperature of C phase IGBT module is judged when executing step S301
Whether it is greater than the first temperature difference threshold with the difference of the temperature of A phase IGBT module and less than the second temperature difference threshold；And judge C phase
Whether the difference of the temperature of IGBT module and the temperature of B phase IGBT module is greater than the first temperature difference threshold and less than the second temperature difference threshold
Value；And judge whether the temperature of B phase IGBT module and the difference of the temperature of A phase IGBT module are greater than the first temperature difference threshold and small
In the second temperature difference threshold.Wherein, the first temperature difference threshold in these three judgements can be mutually different value, be also possible to identical
Value.Likewise, the second temperature difference threshold in these three judgements can be mutually different value, it is also possible to identical value.
Optionally, in one specific embodiment of the application, the first temperature difference threshold and the second temperature difference threshold by motor revolving speed,
The electric current of three-phase IGBT module and the channel flows of motor determine.For example, judging the temperature and A phase IGBT of C phase IGBT module
Whether the temperature gap of module is greater than the first temperature difference threshold and less than the second temperature difference threshold, the first temperature difference threshold and second at this time
Temperature difference threshold is determined by the channel flows of the revolving speed of motor, the electric current of C phase IGBT module, the electric current of A phase IGBT module and motor
It is fixed.And judge whether the temperature of C phase IGBT module and the temperature gap of B phase IGBT module are greater than the first temperature difference threshold and less than
When two temperature difference thresholds, the first temperature difference threshold and the second temperature difference threshold at this time is then the electricity of revolving speed by motor, C phase IGBT module
The channel flows of stream, the electric current of B phase IGBT module and motor determine.Therefore, the first temperature difference threshold is compared with it
Phase IGBT module it is current related, the first temperature difference threshold for comparing of the temperature difference with different two-phases is also different.Similarly,
The phase IGBT module that second temperature difference threshold is also compared with it is current related, the temperature difference with different two-phases compares
The second temperature difference threshold be also different.
If step S301 judges that the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than
First temperature difference threshold and less than the second temperature difference threshold, thens follow the steps S303.If step S301 judges three-phase IGBT module
Temperature in the temperature gap of any two-phase IGBT module be greater than the second temperature difference threshold, then follow the steps S302.
It S302, is protection threshold value by the torque settings of motor.
Wherein, protection threshold value can be taking human as being set.This protection threshold value is lower torque numerical value, be may be selected close
In 0 even equal to 0 numerical value as threshold value is protected, to reduce the operation of motor.As two-phase IGBT any in three-phase IGBT module
When the temperature difference of module is greater than the second temperature difference threshold, it was demonstrated that motor operating state is dangerous at this time, can be to the work of three-phase IGBT module
It is impacted as state.Therefore it needs the torque settings of motor to be protection threshold value, to reduce the operation of motor.It executes the step
It after S302, then continues back in step S101 shown in fig. 1, continues to detect the temperature value of three-phase IGBT module.
S303, by the power setting of motor be less than current power value.
When the temperature difference of two-phase IGBT module any in three-phase IGBT module is greater than the first temperature difference threshold and less than second temperature difference
When threshold value, it was demonstrated that the power of motor is larger at this time, causes influence to the safety of three-phase IGBT module and stabilization, therefore can pass through
Step S303 is executed, the power setting of motor is played into protection three-phase for the value less than current power to reduce the operation of motor
The effect of IGBT module.After executing the step S303, then continues back in step S101 shown in fig. 1, continue to three-phase
The temperature value of IGBT module is detected.
In temperature checking method provided by the present application, by obtaining the temperature of three-phase IGBT module, in three-phase IGBT module
When meeting motor normal running (operation) conditions, judge any two-phase IGBT module in the temperature of three-phase IGBT module temperature gap whether
Greater than the first temperature difference threshold.If the temperature gap of any two-phase in three-phase IGBT module is greater than the first temperature difference threshold, to electricity
Machine takes the first safeguard measure.Wherein, three-phase IGBT module includes: the A phase IGBT module nearest from motor water inlet, from motor
The nearest C phase IGBT module of water outlet, and the B phase IGBT module between A phase IGBT module and C phase IGBT module；The
One safeguard measure for reducing motor operation.Compared to the prior art, the application has pair in the case where motor operates normally
The temperature gap of any two-phase IGBT module of three-phase IGBT module is detected, so that any in three-phase IGBT module
The temperature gap of two-phase IGBT module is greater than the first temperature difference threshold, i.e., when three-phase IGBT module is under abnormal working position,
Just safeguard measure is taken to motor, improves the protection efficiency to three-phase IGBT module.
Based on temperature checking method disclosed in above-mentioned the embodiment of the present application, the embodiment of the present application also correspondence discloses a kind of temperature
Spend detection device, refering to Fig. 4, the temperature-detecting device 400 specifically include that acquiring unit 401, the first judging unit 402 and
First protection location 403.
Acquiring unit 401, for obtaining the temperature of three-phase IGBT module.Wherein, three-phase IGBT module includes: to enter from motor
The nearest A phase IGBT module in the mouth of a river, the C phase IGBT module nearest from motor water outlet, and it is located at A phase IGBT module and C phase
B phase IGBT module between IGBT module.
First judging unit 402 judges three-phase if the temperature for three-phase IGBT module meets motor normal running (operation) conditions
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold in the temperature of IGBT module.Wherein, motor is normal
Service condition is that the temperature of temperature and B phase IGBT module that the temperature of A phase IGBT module is less than B phase IGBT module is less than C phase
The temperature of IGBT module.
First protection location 403, if in temperature for judging three-phase IGBT module any two-phase IGBT module temperature
It spends difference and is greater than the first temperature difference threshold, then the first safeguard measure is taken to motor.Wherein, the first safeguard measure is for reducing motor
Operation.
Optionally, in one specific embodiment of the application, the first temperature difference threshold is by the revolving speed of motor, institute's phase IGBT module
The channel flows of electric current and motor determine.
Optionally, in one specific embodiment of the application, the first protection location 403, comprising: the first setup unit and second
Setup unit.
First setup unit, if in temperature for judging three-phase IGBT module any two-phase IGBT module temperature difference
Value is greater than the first temperature difference threshold and less than the second temperature difference threshold, then is the value less than current power by the power setting of motor.
Second setup unit, if in temperature for judging three-phase IGBT module any two-phase IGBT module temperature difference
Value is greater than the second temperature difference threshold, then is protection threshold value by the torque settings of motor.
The specific principle of each unit and subelement in temperature-detecting device 400 disclosed in above-mentioned the embodiment of the present application and
Implementation procedure, it is identical as above-mentioned temperature checking method shown in fig. 1, reference can be made to corresponding in temperature checking method shown in fig. 1
Part is not discussed here.
In temperature-detecting device 400 provided by the present application, the temperature of three-phase IGBT module is obtained by acquiring unit 401,
First judging unit 402 is when three-phase IGBT module meets motor normal running (operation) conditions, in the temperature that judges three-phase IGBT module
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold.If the temperature of any two-phase in three-phase IGBT module
When spending difference greater than the first temperature difference threshold, the first protection location 403 takes the first safeguard measure to motor.Wherein, three-phase IGBT
Module includes: the A phase IGBT module nearest from motor water inlet, the C phase IGBT module nearest from motor water outlet, and is located at
B phase IGBT module between A phase IGBT module and C phase IGBT module；First safeguard measure for reducing motor operation.It compares
In the prior art, the application has the temperature to any two-phase IGBT module of three-phase IGBT module in the case where motor operates normally
Degree difference is detected, so that the temperature gap of any two-phase IGBT module in three-phase IGBT module is greater than first temperature difference
When threshold value, i.e. three-phase IGBT module are under abnormal working position, safeguard measure just is taken to motor, is improved to three-phase
The protection efficiency of IGBT module.
Refering to Fig. 5, this application discloses another temperature checking methods, specifically includes the following steps:
S501, the temperature for obtaining three-phase IGBT module.
S501 is identical as the implementation procedure of the S101 in Fig. 1 and principle herein, and which is not described herein again.
S502, judge whether the temperature of three-phase IGBT module meets motor normal running (operation) conditions.
If the temperature of three-phase IGBT module meets motor normal running (operation) conditions, S503 is thened follow the steps, if three-phase IGBT mould
The temperature of block is unsatisfactory for motor normal running (operation) conditions, thens follow the steps S505.
S502 is identical as the implementation procedure of the S102 in Fig. 1 and principle herein, and which is not described herein again.
S503, judge whether the temperature gap of any two-phase IGBT module in the temperature of three-phase IGBT module is greater than the first temperature
Poor threshold value.
S503 is identical as the implementation procedure of the S103 in Fig. 1 and principle herein, and which is not described herein again.
S504, the first safeguard measure is taken motor.
S504 is identical as the implementation procedure of the S104 in Fig. 1 and principle herein, and which is not described herein again.
S505, judge whether the revolving speed of motor is greater than stall threshold value.
If the temperature of three-phase IGBT module is unsatisfactory for motor normal running (operation) conditions, illustrate that motor is in irregular operating
In state, therefore step S505 need to be executed, judge whether motor the case where stall occurs.When the revolving speed of motor is greater than stall threshold
When value, then judge that stall does not occur in motor, only motor need to be enabled to take the first safeguard measure, that is, can reach protection three-phase IGBT
The purpose of module.Therefore, when the revolving speed of motor is greater than stall threshold value, step S507 is executed.When the revolving speed of motor is less than or waits
When stall threshold value, then judge that stall situation occurs in motor, needs that motor is enabled to take the second safeguard measure, just can reach guarantor
The purpose of three-phase IGBT module is protected, therefore, when motor is less than or equal to stall threshold value, executes step S506.
S506, the second safeguard measure is taken motor.
When motor is in locked rotor condition, the second safeguard measure is taken to motor.Wherein, the second safeguard measure for reducing
The operation of motor or the operation for stopping three-phase IGBT module.Since motor is in locked rotor condition, it is therefore desirable to take phase to motor
The safeguard measure answered.Wherein, the second safeguard measure can be identical as the first safeguard measure, such as reduces the measure of motor operation.
Or it is stronger compared to protectiveness of first safeguard measure to three-phase IGBT module, such as directly three-phase IGBT module is closed
Protection of pipe.
Optionally, refering to Fig. 6, in one specific embodiment of the application, a kind of embodiment of step S506, packet are executed
It includes:
S601, judge in three-phase IGBT module whether the maximum phase IGBT module of electric current is that temperature is most in three-phase IGBT module
High phase IGBT module.
Specifically, by obtaining the electric current of three-phase IGBT module, the i.e. electric current of acquisition A phase IGBT module, B phase IGBT module
Electric current and C phase IGBT module electric current, the electric current of three-phase IGBT module is compared, is determined in three-phase IGBT module
The maximum phase IGBT module of electric current.Such as determine that C phase IGBT module is the maximum phase IGBT mould of electric current in three-phase IGBT module
Block.And then the temperature of the step S501 three-phase IGBT module obtained is compared again, judge that temperature is most in three-phase IGBT module
Whether high phase IGBT module is C phase IGBT module.If the maximum phase IGBT module of electric current and the highest phase IGBT module of temperature
Be not it is same, S603 is thened follow the steps, if the highest phase IGBT module of temperature and the maximum phase of electric current in three-phase IGBT module
IGBT module be it is same, then follow the steps S602.
S602, the temperature for judging electric current maximum phase IGBT module and any other phase IGBT module in three-phase IGBT module
Whether degree difference is greater than third temperature difference threshold.
If judging, the maximum phase IGBT module of electric current is that temperature is highest in three-phase IGBT module in three-phase IGBT module
Phase IGBT module, such as judge that C phase IGBT module is temperature highest and the maximum module of electric current in three-phase IGBT module, then
Judge whether C phase IGBT module and the temperature difference of A phase IGBT module are greater than third temperature difference threshold, and judges C phase IGBT module and B phase
Whether the temperature difference of IGBT module is greater than third temperature difference threshold.If judging C phase IGBT module and A phase IGBT module or B phase
The difference of IGBT module is greater than third temperature difference threshold, then illustrates that motor is not only in locked rotor condition, and the operation of motor is in not
It in the state of safety, in order to protect three-phase IGBT module, needs to take three-phase IGBT module pass protection of pipe, i.e. execution step
S603.If judging, the temperature gap of C phase IGBT module and other two-phase IGBT modules is respectively less than or is equal to third temperature difference threshold,
Then illustrate that the performance number of motor at this time is larger, may influence whether the safety of three-phase IGBT module, therefore need to only reduce motor
Current power, i.e. execution step S604.
It should also be noted that, third temperature difference threshold is pre-set value.The alternate temperature difference of different two is compared
Third temperature difference threshold can be different, be also possible to identical value.Optionally, third temperature difference threshold can be by motor
The channel flows of revolving speed, the electric current of three-phase IGBT module and motor determine.For example, by C phase IGBT module and B phase IGBT mould
The temperature difference between block compares with third temperature difference threshold, then third temperature difference threshold at this time is revolving speed by motor, C phase IGBT module
The channel flows of electric current, the electric current of B phase IGBT module and motor determine.
S603, pass protection of pipe is taken to three-phase IGBT module.
If it is maximum generally to judge out electric current in three-phase IGBT module in the case that the operation of motor is in relatively safety
Phase IGBT module is the highest phase IGBT module of temperature in three-phase IGBT module.If step S601 judges in three-phase IGBT module
The maximum phase IGBT module of electric current is not the highest phase IGBT module of temperature in three-phase IGBT module, then at the operation for illustrating motor
It in unsafe state, needs to take pass protection of pipe to three-phase IGBT module, by the connection between three-phase IGBT module and motor
It disconnects, protects three-phase IGBT module to realize.
If step S602 judges the maximum phase IGBT module of electric current and any other phase IGBT in three-phase IGBT module
The temperature gap of module is greater than third temperature difference threshold, illustrates that motor is constantly in locked rotor condition, and the two alternate temperature difference are larger, electricity
The operating status of machine is also and dangerous, therefore similarly needs to take pass protection of pipe to three-phase IGBT module, by three-phase IGBT mould
Connection between block and motor disconnects, and protects three-phase IGBT module to realize.
S604, by the power setting of motor be less than current power value.
If step S602 judges the maximum phase IGBT module of electric current and other two-phase IGBT modules in three-phase IGBT module
Temperature gap be respectively less than or be equal to third temperature difference threshold, illustrate that current motor is in the operating status of higher-wattage, may
Influence the safety of three-phase IGBT module, it is therefore desirable to by the power setting of motor be less than current power value, with ensure
The safety of three-phase IGBT module.
S507, the first safeguard measure is taken motor.
Wherein, the first safeguard measure that step S507 is mentioned is identical as the first safeguard measure that step S504 is mentioned, and is
For reducing the operation of motor, the first safeguard measure can protect reduction power of motor, set 0 torque etc. for the torque of motor
Mode.
When step S505 judges the revolving speed of motor greater than stall threshold value, illustrate that motor is not in locked rotor condition, because
This operation that need to reduce motor can reach the purpose protected to three-phase IGBT module.
Optionally, refering to Fig. 7, in one specific embodiment of the application, a kind of embodiment of step S507, packet are executed
It includes:
S701, judge that the temperature of three-phase IGBT module is unsatisfactory for whether time of motor normal running (operation) conditions is greater than time threshold
Value.
If step S505 judges that the revolving speed of motor is greater than stall threshold value, illustrate that motor is not on locked rotor condition, it can
Then judge the temperature of three-phase IGBT module be unsatisfactory for motor normal running (operation) conditions time it is whether too long, therefore can be by three-phase
The temperature of IGBT module is unsatisfactory for the time of motor normal running (operation) conditions compared with time threshold, if being unsatisfactory for motor normal operation
The time of condition is greater than time threshold, then illustrating motor, operating status is dangerous at this time, may influence three-phase IGBT module.Cause
This needs the torque settings of motor to be protection threshold value, i.e. execution step S702 is to realize the protection to three-phase IGBT module.If
The time that motor is unsatisfactory for normal running (operation) conditions is less than or equal to time threshold, then need to only execute S703, can ensure three-phase
The safety of IGBT module.
It S702, is protection threshold value by the torque settings of motor.
Wherein, protection threshold value can be taking human as being set.This protection threshold value is lower torque numerical value, be may be selected close
In 0 even equal to 0 numerical value as threshold value is protected, to reduce the operation of motor.If the temperature of three-phase IGBT module is unsatisfactory for electricity
The time of machine normal running (operation) conditions is greater than time threshold, it was demonstrated that the duration of motor irregular operating is longer, motor operation shape
State is dangerous, can impact to the working condition of three-phase IGBT module.Therefore it needs the torque settings of motor to be protection threshold
Value, to reduce the operation of motor.
S703, by the power setting of motor be less than current power value.
If the time that the temperature of three-phase IGBT module is unsatisfactory for motor normal running (operation) conditions is less than or equal to time threshold,
Illustrate that the power of motor at this time is larger, influence is caused on the safety of three-phase IGBT module and stabilization, therefore can be by the function of motor
Rate is set as the value less than current power, to reduce the operation of motor, plays the role of protecting three-phase IGBT module.
In temperature checking method provided by the embodiments of the present application, by being unsatisfactory for motor just in the temperature of three-phase IGBT module
When normal service condition, judge whether the revolving speed of motor is greater than stall threshold value, if judging, the revolving speed of motor is greater than stall threshold value,
First safeguard measure is taken to motor；If judging, the revolving speed of motor is less than or equal to stall threshold value, takes second to motor
Safeguard measure.Since the application has been additionally contemplates that three-phase IGBT module when being unsatisfactory for motor normal running (operation) conditions, whether motor
The case where stall, therefore more improve the protection efficiency to three-phase IGBT module.
Temperature checking method disclosed in embodiment is shown based on Fig. 5, the embodiment of the present application also correspondence discloses a kind of temperature
Detection device, refering to Fig. 8, which specifically includes that acquiring unit 801, the first judging unit 802, first are protected
Protect unit 803, second judgment unit 804, the second protection location 805 and third protection location 806.
Acquiring unit 801, for obtaining the temperature of three-phase IGBT module.Wherein, three-phase IGBT module includes: to enter from motor
The nearest A phase IGBT module in the mouth of a river, the C phase IGBT module nearest from motor water outlet, and it is located at A phase IGBT module and C phase
B phase IGBT module between IGBT module.
Acquiring unit 801 is identical as the concrete principle of the acquiring unit 401 shown in Fig. 4 and implementation procedure, reference can be made to, herein
It repeats no more.
First judging unit 802 judges three-phase if the temperature for three-phase IGBT module meets motor normal running (operation) conditions
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold in the temperature of IGBT module.Wherein, motor is normal
Service condition is that the temperature of temperature and B phase IGBT module that the temperature of A phase IGBT module is less than B phase IGBT module is less than C phase
The temperature of IGBT module.
First judging unit 802 is identical as the concrete principle of the first judging unit 402 shown in Fig. 4 and implementation procedure, can
It participates in, details are not described herein again.
First protection location 803, if in temperature for judging three-phase IGBT module any two-phase IGBT module temperature
It spends difference and is greater than the first temperature difference threshold, then the first safeguard measure is taken to motor.Wherein, the first safeguard measure is for reducing described
The operation of motor.
First protection location 803 is identical as the concrete principle of the first protection location 403 shown in Fig. 4 and implementation procedure, can
Referring to details are not described herein again.
Second judgment unit 804 judges electricity if the temperature for three-phase IGBT module is unsatisfactory for motor normal running (operation) conditions
Whether the revolving speed of machine is greater than stall threshold value.
Second protection location 805, if taking the first guarantor to motor for judging that the revolving speed of motor is greater than stall threshold value
Shield measure.
Optionally, in one specific embodiment of the application, the second protection location 805, comprising: third judging unit, the 4th
Setup unit and the 5th setup unit.
Third judging unit, if judging three-phase IGBT module when for judging that the revolving speed of motor is greater than stall threshold value
Temperature be unsatisfactory for whether time of motor normal running (operation) conditions is greater than time threshold.
4th setup unit, if for judge the temperature of three-phase IGBT module be unsatisfactory for motor normal running (operation) conditions when
Between be greater than time threshold, then by the torque settings of motor be protection threshold value.
5th setup unit, if for judge the temperature of three-phase IGBT module be unsatisfactory for motor normal running (operation) conditions when
Between be less than or equal to time threshold, then by the power setting of motor be less than current power value.
Third protection location 806, if taking for judging that the revolving speed of motor is less than or equal to stall threshold value motor
Second safeguard measure.Wherein the second safeguard measure is for reducing the operation of motor or the operation of stopping three-phase IGBT module.
Optionally, in one specific embodiment of the application, third protection location, comprising: the 4th judging unit, the 6th setting
Unit, the 5th judging unit, the 7th setup unit and the 8th setup unit.
4th judging unit, if judging three-phase when for judging that the revolving speed of motor is less than or equal to stall threshold value
Whether the maximum phase IGBT module of electric current is the highest phase IGBT module of temperature in three-phase IGBT module in IGBT module.
6th setup unit, if for judging that the maximum phase IGBT module of electric current is not three-phase in three-phase IGBT module
The highest phase IGBT module of temperature, then take pass protection of pipe to three-phase IGBT module in IGBT module.
5th judging unit, if for judging that the maximum phase IGBT module of electric current is three-phase IGBT in three-phase IGBT module
The highest phase IGBT module of temperature in module, then judge in three-phase IGBT module the maximum phase IGBT module of electric current with it is any other
Whether the temperature gap of one phase IGBT module is greater than third temperature difference threshold.
7th setup unit, if for judge in three-phase IGBT module the maximum phase IGBT module of electric current with it is any other
The temperature gap of one phase IGBT module is greater than third temperature difference threshold, then takes pass protection of pipe to three-phase IGBT module.
8th setup unit, if for judging the maximum phase IGBT module of electric current and other two-phases in three-phase IGBT module
The temperature gap of IGBT module is respectively less than or is equal to third temperature difference threshold, then is less than current power by the power setting of motor
Value.
The specific principle of each unit and subelement in temperature-detecting device 800 disclosed in above-mentioned the embodiment of the present application and
Implementation procedure, it is identical as the temperature checking method shown in above-mentioned Fig. 5, reference can be made to corresponding in temperature checking method shown in Fig. 5
Part is not discussed here.
In temperature-detecting device 800 provided by the embodiments of the present application, by second judgment unit 804 in three-phase IGBT module
Temperature when being unsatisfactory for motor normal running (operation) conditions, judge whether the revolving speed of motor is greater than stall threshold value, if judging motor
Revolving speed is greater than stall threshold value, then the second protection location 805 takes the first safeguard measure to motor；If judging, the revolving speed of motor is small
In or equal to stall threshold value, then third protection location 806 takes the second safeguard measure to motor.Since the application is additionally contemplates that
Three-phase IGBT module when being unsatisfactory for motor normal running (operation) conditions, motor whether stall the case where, therefore more improve to three
The protection efficiency of phase IGBT module.
Professional technician can be realized or using the present invention.Profession of the various modifications to these embodiments to this field
It will be apparent for technical staff, the general principles defined herein can not depart from spirit or model of the invention
In the case where enclosing, realize in other embodiments.Therefore, the present invention will not be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. a kind of temperature checking method characterized by comprising
Obtain the temperature of three-phase IGBT module；Wherein, the three-phase IGBT module includes: the A phase nearest from motor water inlet
IGBT module, the C phase IGBT module nearest from the motor water outlet, and it is located at the A phase IGBT module and the C phase
B phase IGBT module between IGBT module；
If the temperature of the three-phase IGBT module meets motor normal running (operation) conditions, in the temperature for judging the three-phase IGBT module
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold；Wherein, the motor normal running (operation) conditions is institute
The temperature of temperature and the B phase IGBT module that the temperature for stating A phase IGBT module is less than the B phase IGBT module is less than the C
The temperature of phase IGBT module；
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than the first temperature difference threshold
Value, then take the first safeguard measure to the motor；Wherein, first safeguard measure for reducing the motor operation.
2. if the method according to claim 1, wherein in the temperature for judging the three-phase IGBT module
The temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold, then takes the first safeguard measure to the motor, comprising:
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than first temperature
Poor threshold value and less than the second temperature difference threshold, then by value that the power setting of the motor is less than current power；
If judging, the temperature gap of any two-phase IGBT module in the temperature of the three-phase IGBT module is greater than second temperature
The torque settings of the motor are then protection threshold value by poor threshold value.
3. the method according to claim 1, wherein further include:
If the temperature of the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions, judge the motor revolving speed whether
Greater than stall threshold value；
If judging, the revolving speed of the motor is greater than the stall threshold value, takes first safeguard measure to the motor；
If judging, the revolving speed of the motor is less than or equal to the stall threshold value, takes the second protection to arrange in the motor
It applies；Wherein second safeguard measure is for reducing the operation of the motor or the operation of the stopping three-phase IGBT module.
4. according to the method described in claim 3, it is characterized in that, if the revolving speed for judging the motor is greater than described block up
When turning threshold value, then first safeguard measure is taken to the motor, comprising:
If judge that the revolving speed of the motor is greater than the stall threshold value, judge that the temperature of the three-phase IGBT module is discontented
Whether the time of the foot motor normal running (operation) conditions is greater than time threshold；
If judge the temperature of the three-phase IGBT module be unsatisfactory for the motor normal running (operation) conditions time be greater than it is described when
Between threshold value, then by the torque settings of the motor be the protection threshold value；
If judging, the temperature of the three-phase IGBT module is unsatisfactory for time of the motor normal running (operation) conditions and is less than or equal to
The power setting of the motor is then the value less than current power by the time threshold.
5. according to the method described in claim 3, it is characterized in that, if the revolving speed for judging the motor is less than or equal to
When the stall threshold value, then the second safeguard measure is taken to the motor, comprising:
If judge that the revolving speed of the motor is less than or equal to the stall threshold value, judge electric in the three-phase IGBT module
Flow whether maximum phase IGBT module is the highest phase IGBT module of temperature in the three-phase IGBT module；
If judging, the maximum phase IGBT module of electric current is not temperature in the three-phase IGBT module in the three-phase IGBT module
Highest phase IGBT module then takes pass protection of pipe to the three-phase IGBT module；
If judging in the three-phase IGBT module, the maximum phase IGBT module of electric current is that temperature is most in the three-phase IGBT module
High phase IGBT module then judges the maximum phase IGBT module of electric current and any other phase IGBT in the three-phase IGBT module
Whether the temperature gap of module is greater than third temperature difference threshold；
If judging the temperature of electric current maximum phase IGBT module and any other phase IGBT module in the three-phase IGBT module
It spends difference and is greater than the third temperature difference threshold, then pass protection of pipe is taken to the three-phase IGBT module；
If judging the temperature difference of electric current maximum phase IGBT module and other two-phase IGBT modules in the three-phase IGBT module
Value is respectively less than or is equal to the third temperature difference threshold, then is the value less than current power by the power setting of the motor.
6. the method according to claim 1, wherein revolving speed of first temperature difference threshold by the motor, institute
The channel flows of the electric current and the motor of stating three-phase IGBT module determine.
7. a kind of temperature-detecting device characterized by comprising
Acquiring unit, for obtaining the temperature of three-phase IGBT module；Wherein, the three-phase IGBT module includes: to enter water from motor
Mouth nearest A phase IGBT module, the C phase IGBT module nearest from the motor water outlet, and it is located at the A phase IGBT module
B phase IGBT module between the C phase IGBT module；
First judging unit judges described three if the temperature for the three-phase IGBT module meets motor normal running (operation) conditions
Whether the temperature gap of any two-phase IGBT module is greater than the first temperature difference threshold in the temperature of phase IGBT module；Wherein, the electricity
Machine normal running (operation) conditions is temperature of the temperature less than the B phase IGBT module of the A phase IGBT module and the B phase IGBT
The temperature of module is less than the temperature of the C phase IGBT module；
First protection location, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature difference
Value is greater than the first temperature difference threshold, then takes the first safeguard measure to the motor；Wherein, first safeguard measure for reducing
The operation of the motor.
8. device according to claim 7, which is characterized in that first protection location, comprising:
First setup unit, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature difference
Value is greater than first temperature difference threshold and less than the second temperature difference threshold, then is less than current function by the power setting of the motor
The value of rate；
Second setup unit, if in temperature for judging the three-phase IGBT module any two-phase IGBT module temperature difference
Value is greater than second temperature difference threshold, then is protection threshold value by the torque settings of the motor.
9. device according to claim 7, which is characterized in that further include:
Second judgment unit, if the temperature for the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions, judgement
Whether the revolving speed of the motor is greater than stall threshold value；
Second protection location, if taking for judging that the revolving speed of the motor is greater than the stall threshold value the motor
First safeguard measure；
Third protection location, if for judging that the revolving speed of the motor is less than or equal to the stall threshold value, to the electricity
Machine takes the second safeguard measure；Wherein operation or the stopping three-phase of second safeguard measure for reducing the motor
The operation of IGBT module.
10. device according to claim 9, which is characterized in that second protection location, comprising:
Third judging unit, if judging the three-phase when for judging that the revolving speed of the motor is greater than the stall threshold value
Whether the time that the temperature of IGBT module is unsatisfactory for the motor normal running (operation) conditions is greater than time threshold；
4th setup unit, if for judging that the temperature of the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions
Time be greater than the time threshold, then by the torque settings of the motor be the protection threshold value；
5th setup unit, if for judging that the temperature of the three-phase IGBT module is unsatisfactory for the motor normal running (operation) conditions
Time be less than or equal to the time threshold, then by the power setting of the motor be less than current power value.
11. device according to claim 9, which is characterized in that the third protection location, comprising:
4th judging unit, if judging institute when for judging that the revolving speed of the motor is less than or equal to the stall threshold value
State whether the maximum phase IGBT module of electric current in three-phase IGBT module is the highest phase IGBT of temperature in the three-phase IGBT module
Module；
6th setup unit, if for judging that the maximum phase IGBT module of electric current is not described three in the three-phase IGBT module
The highest phase IGBT module of temperature in phase IGBT module, then take pass protection of pipe to the three-phase IGBT module；
5th judging unit, if for judging that the maximum phase IGBT module of electric current is the three-phase in the three-phase IGBT module
The highest phase IGBT module of temperature in IGBT module, then judge in the three-phase IGBT module the maximum phase IGBT module of electric current with
Whether the temperature gap of any other phase IGBT module is greater than third temperature difference threshold；
7th setup unit, if for judge in the three-phase IGBT module the maximum phase IGBT module of electric current with it is any other
The temperature gap of one phase IGBT module is greater than the third temperature difference threshold, then takes pass protection of pipe to the three-phase IGBT module；
8th setup unit, if for judging the maximum phase IGBT module of electric current and other two-phases in the three-phase IGBT module
The temperature gap of IGBT module is respectively less than or is equal to the third temperature difference threshold, then is less than working as by the power setting of the motor
The value of preceding power.
12. device according to claim 7, which is characterized in that revolving speed of first temperature difference threshold by the motor, institute
The channel flows of the electric current and the motor of stating three-phase IGBT module determine.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702246A (en) * | 2019-10-23 | 2020-01-17 | 厦门潞铠科技有限公司 | Method and system for monitoring connection state of main loop of switch cabinet |
| CN113686463A (en) * | 2021-09-06 | 2021-11-23 | 广东电网有限责任公司 | Temperature monitoring device and method and power distribution equipment |
| CN113933057A (en) * | 2021-09-01 | 2022-01-14 | 郑州嘉晨电器有限公司 | Method and system for detecting locked rotor of permanent magnet motor |
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