CN109808672A - A kind of mixing dynamical vehicle torsional moment control method and device - Google Patents
A kind of mixing dynamical vehicle torsional moment control method and device Download PDFInfo
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- CN109808672A CN109808672A CN201711173589.5A CN201711173589A CN109808672A CN 109808672 A CN109808672 A CN 109808672A CN 201711173589 A CN201711173589 A CN 201711173589A CN 109808672 A CN109808672 A CN 109808672A
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Abstract
The present invention discloses a kind of mixing dynamical vehicle torsional moment control method and device.This method comprises: increasing the simulation heat of motor when judging that motor powered torque is greater than electronic nominal torque；Increased simulation heat is directly proportional to the motor powered torque；When simulation heat after judgement increase is greater than default maximum heat, motor powered torque is reduced.When judging that electric power generation torque is less than power generation nominal torque, increase the simulation heat of motor；Increased simulation heat is directly proportional to the absolute value of the electric power generation torque；When simulation heat after judgement increase is greater than default maximum heat, electric power generation torque is reduced.Mixing dynamical vehicle torsional moment control method and device provided by the invention, according to the thermal change of the Motor torque simulated machine of real-time monitoring, the torque of motor is adjusted according to motor heat, guarantees that motor temperature will not overheat, avoids causing motor certain damage.
Description
Technical field
The present invention relates to Development of HEV Technology field more particularly to a kind of mixing dynamical vehicle torsional moment control method and
Device.
Background technique
As the measure of countries in the world environmental protection is increasingly stringenter, hybrid vehicle is due to its energy conservation, low emission etc.
Feature uses more and more extensive.
Hybrid vehicle refers to that vehicle drive system is joined by two or more single drive systems that can be operated simultaneously
The road horsepower of the vehicle being combined into, vehicle is separately or cooperatively mentioned according to actual vehicle running state by single drive system
For.Usually said hybrid vehicle refers to oil-electric vehicle, that is, uses traditional internal combustion engine (diesel engine or vapour
Oil machine) and motor as power source, the engine that also has uses other alternative fuel, such as compressed natural gas, third by transformation
Alkane and alcohol fuel etc..
The motor of hybrid vehicle can work under two different working conditions, i.e. motoring condition and power generation shape
State.When hybrid vehicle motor work in motoring condition, by the electric energy in battery be converted into mechanical energy driving automobile
Traveling, when hybrid vehicle motor work in generating state, convert mechanical energy into electric energy, be stored in battery.
No matter motor work under any state, can all cause the variation of motor temperature, if motor due to the variation of Motor torque
Temperature overheating is then likely to affect the performance of motor.
In the prior art without for Motor torque variation cause motor temperature to change, especially temperature overheating when propose phase
The solution answered.
Summary of the invention
The application's is designed to provide a kind of mixing dynamical vehicle torsional moment control method and device, guarantees in motor temperature
Maximum motor torque is exported in the case where not overheating.
The present invention provides a kind of mixing dynamical vehicle torsional moment control method, comprising:
When judging that motor powered torque is greater than electronic nominal torque, increase the simulation heat of motor；Increased simulation heat
It is directly proportional to the motor powered torque；
When simulation heat after judgement increase is greater than default maximum heat, motor powered torque is reduced.
Preferably, further includes: when judging that the motor powered torque is less than or equal to electronic nominal torque, reduce the mould
Quasi- heat, reduced simulation heat are inversely proportional with the motor powered torque.
Preferably, further includes:
When simulation heat after judging the increase is less than or equal to default maximum heat, motor powered peak torque is set
It is set to motor maximum electric torque.
Preferably, the reduction motor powered torque, specifically:
TrqMotorMotMax=TrqMotorMotPeak+(TrqMotorMotPeak-TrqMotorMotRated)*max(-1,(BuffMax-
Buff)/BuffMax)
Wherein, TrqMotorMotMaxFor motor maximum electric torque；
TrqMotorMotPeakFor the motor powered peak torque being obtained ahead of time；
TrqMotorMotRatedFor motor powered nominal torque；
Buff is the simulation heat；BuffMaxTo preset maximum heat.
The embodiment of the present invention also provides a kind of mixing dynamical vehicle torsional moment control method, comprising:
When judging that electric power generation torque is less than power generation nominal torque, increase the simulation heat of motor；Increased simulation heat
It is directly proportional to the absolute value of the electric power generation torque；
When simulation heat after judgement increase is greater than default maximum heat, electric power generation torque is reduced.
Preferably, further includes: when judging that the electric power generation torque is greater than or equal to power generation nominal torque, reduce the mould
Quasi- heat, the simulation heat and the absolute value of the electric power generation torque of reduction are inversely proportional.
Preferably, further includes:
When simulation heat after judging the reduction is less than or equal to default maximum heat, electric power generation peak torque is set
It is set to motor maximum generation torque.
Preferably, the reduction electric power generation torque, specifically:
TrqMotorGenMax=TrqMotorGenPeak+(TrqMotorGenPeak-TrqMotorGenRated)*max(-1,(BuffMax-
Buff)/BuffMax)
Wherein, TrqMotorGenMaxFor motor maximum generation torque；
TrqMotorGenPeakFor the electric power generation peak torque being obtained ahead of time；
TrqMotorGenRatedFor electric power generation nominal torque；
Buff is the simulation heat；BuffMaxTo preset maximum heat.
The embodiment of the present invention also provides a kind of mixing dynamical vehicle torsional moment control device, comprising:
Electric torque judging unit, for judging whether motor powered torque is greater than electronic nominal torque；
Heat adding unit is simulated, for judging that motor powered torque is greater than electronic volume when the electric torque judging unit
When determining torque, increase the simulation heat of motor；Increased simulation heat is directly proportional to the motor powered torque；
Heat judging unit is simulated, for judging whether the simulation heat after increasing is greater than default maximum heat；
Electric torque reduces unit, is greater than for the simulation heat after simulation heat judging unit judgement increases pre-
If when maximum heat, reducing motor powered torque.
The embodiment of the present invention also provides a kind of mixing dynamical vehicle torsional moment control device, comprising:
Power generation torque judging unit, for judging whether electric power generation torque is less than power generation nominal torque；
Heat adding unit is simulated, for judging that electric power generation torque is less than power generation volume when the power generation torque judging unit
When determining torque, increase the simulation heat of motor；Increased simulation heat is directly proportional to the absolute value of the electric power generation torque；
Heat judging unit is simulated, for judging whether the simulation heat after reducing is greater than default maximum heat；
Power generation torque reduces unit, is greater than for the simulation heat after simulation heat judging unit judgement reduces pre-
If when maximum heat, reducing electric power generation torque.
Compared with prior art, the present invention has at least the following advantages:
The Motor torque of real-time monitoring hybrid vehicle, the Motor torque include motor powered torque and electric power generation
Torque.When motor work is in motoring condition, according to the thermal change of the motor powered torque simulated machine of real-time monitoring, according to
Motor heat is adjusted the electric torque of motor, guarantees that motor temperature will not overheat, avoids causing motor certain
Damage.When motor work is in generating state, according to the thermal change of the electric power generation torque simulated machine of real-time monitoring, according to
Motor heat is adjusted the power generation torque of motor, guarantees that motor temperature will not overheat, avoids causing motor certain
Damage.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, 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 some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the flow chart of first embodiment provided by the present application；
Fig. 2 is the flow chart of second embodiment provided by the present application；
Fig. 3 is the flow chart of 3rd embodiment provided by the present application；
Fig. 4 is the flow chart of fourth embodiment provided by the present application；
Fig. 5 is the flow chart of the 5th embodiment provided by the present application；
Fig. 6 is the flow chart of sixth embodiment provided by the present application；
Fig. 7 is the apparatus structure schematic diagram of the 7th embodiment provided by the present application；
Fig. 8 is the apparatus structure schematic diagram of the 8th embodiment provided by the present application.
Specific embodiment
It is being sent out the inventors of the present application found that no matter the motor of hybrid vehicle is work in motoring condition or work
Electricity condition may lead electrizer thermal change since Motor torque changes, and motor itself can not bear excessively high heat
Amount.That is the resistance to calorific value of motor itself is limited.It is understood that Motor torque cannot be unlimited towards a direction
System variation.For example, motor powered torque cannot increase always, motor powered torque will lead to motor heat when increasing to some value
Measure excessively high, more than the resistance to calorific value of the highest of motor, heat is too high to may cause motor damage.Therefore, it is necessary to according to motor heat pair
Motor torque is adjusted, and guarantees that motor temperature within the scope of motor can be born, avoids causing motor certain damage
Wound.
The application proposes a kind of mixing dynamical vehicle torsional moment control method and device.The electricity of real-time monitoring hybrid vehicle
Machine torque, according to the variation of the Motor torque simulated machine heat, according to the heat of motor according to corresponding Developing Tactics electricity
Machine torque.Obviously, the scheme that the application proposes can to the greatest extent may be used while guaranteeing that motor heat is no more than motor resistance to calorific value itself
It can work in the biggish state of Motor torque.
In order to make those skilled in the art more fully understand the present invention program, 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 is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
First embodiment
Referring to Fig. 1, which is the flow chart of first embodiment provided by the present application.Realize the specific step of the embodiment of the present application
It is rapid as follows:
S101: when judging that motor powered torque is greater than motor powered nominal torque, increasing the simulation heat of motor, increased
It is directly proportional to motor powered torque to simulate heat.
As soon as the electronic nominal torque of motor of hybrid power automobile is a fixed value, set when being Motor Production Test, this
A value is not changed by external factor and the operating status of hybrid vehicle.
Under normal circumstances, the motor of hybrid vehicle works in motoring condition, if the electric torque of motor is motor
Electronic nominal torque then generally will not cause motor temperature excessively high, when the electric torque of motor is greater than motor powered nominal torque
When, then corresponding motor temperature may be caused to change, may specifically show as motor temperature raising.It is understood that rising
There is proportionate relationship, if motor powered torque is bigger, raised temperature is got between high temperature and current motor electric torque
It is more, that is, raised temperature is directly proportional to motor powered torque.
In the present embodiment, real-time monitoring motor powered torque judges motor powered torque and motor powered nominal torque
Size, when motor powered torque be greater than motor powered nominal torque when, increase the simulation heat of motor, since heat can not be straight
Detection is connect, therefore, heat is obtained by simulation in the present embodiment.Simulation heat is used for the mistake that simulated machine heat is built up
Journey.The temperature that the increase simulation heat can be understood as current motor is increased.Increase the simulation heat of part and current
The motor powered torque monitored is directly proportional, and the currently monitored motor powered torque arrived is bigger, and increased simulation heat is more, when
Before the motor powered torque that monitors it is smaller, increased simulation heat is smaller.
S102: when the simulation heat after judgement increase is greater than default maximum heat, the electric torque of motor is reduced.
Default maximum heat is a pre-set value, when the simulation heat after increase is greater than default maximum heat,
Then illustrate that motor heat is excessively high, therefore, it is necessary to be adjusted motor powered torque, is embodied as reducing the electric torsional of motor
Square avoids motor heat excessively high.
In S101 by real-time detection to motor powered torque be compared with motor powered nominal torque, judge motor electricity
When dynamic torque is greater than motor powered nominal torque, increase motor simulation heat.It is understood that due to motor powered torque
Benchmark is motor powered nominal torque, then it is motor powered volume that default maximum heat, which can be according to motor powered torque,
It is arranged on the basis of motor heat when determining torque.
Such as: when motor powered torque is motor powered nominal torque, corresponding motor temperature is 35 DEG C, works as motor temperature
Then think that motor temperature is excessively high when more than 45 DEG C, then at this point, default maximum heat can be motor temperature and increase 10 DEG C of correspondences
Heat.It is understood that default maximum heat is also related with the motor heat resistance of hybrid vehicle itself, motor is resistance to
Hot property is better, then presetting maximum heat may be bigger.The embodiment of the present application to default maximum heat without limitation.
In the present embodiment, by real-time monitoring motor powered torque, by motor powered torque and the specified torsion of motor powered
Square is compared, and the simulation heat of motor is adjusted according to comparison result, specifically, motor powered torque is specified greater than motor powered
When torque, increase the simulation heat of motor.Motor simulation heat after increase is compared with default maximum heat, if increasing
Simulation heat afterwards is greater than default maximum heat, then illustrates that current motor electric torque can cause motor temperature excessively high, subtract at this time
The electric torque of small machine can effectively avoid causing motor self-inflicted injury since motor temperature is excessively high.This method passes through mould
To detect motor, whether excess temperature reduces motor powered torque in time and avoids to reduce motor heat quasi- heat when excess temperature
Motor excess temperature.Second embodiment
In view of motor powered torque is not necessarily greater to motor powered nominal torque, the application is introduced below in conjunction with Fig. 2
Two embodiments.
Referring to fig. 2, which is the flow chart of second embodiment provided by the present application.
Method provided in this embodiment specifically includes the following steps:
S201: judging whether motor powered torque is greater than motor powered nominal torque, if so, step S202 is executed, it is no, it holds
Row step S203.
S202: increasing the simulation heat of motor, and increased simulation heat is directly proportional to motor powered torque.
In the present embodiment S201 and S202 respectively in embodiment one S101 and S102 it is identical, particular content may refer to
The description of relevant portion in the application first embodiment, details are not described herein.
S203: reducing the simulation heat of motor, and simulation heat and the motor powered torque of reduction are inversely proportional.
When the electric torque of motor is less than or equal to the electronic nominal torque of motor, it is possible to motor temperature can be caused
It reduces, especially when the electric torque of motor is less than motor powered nominal torque.It is understood that reduced temperature with work as
There is proportionate relationship, if motor powered torque is bigger, reduced temperature is fewer, that is, reduction between front motor electric torque
Temperature is inversely proportional with motor powered torque.
S204: when judgement simulation heat is greater than default maximum heat, motor powered torque is reduced.
It is understood that simulation heat here refers to the simulation heat after being adjusted, for example, working as the electricity of motor
When dynamic torque is greater than motor powered nominal torque, increase the simulation heat of motor, then, simulation heat refers to the simulation after increasing
Heat.For example, the simulation heat of motor is reduced when the electric torque of motor is less than or equal to motor powered nominal torque,
Here simulation heat refers to the simulation heat after reducing.
If by after increase perhaps reduction simulation heat and default maximum heat be compared increase or reduce after
Simulating heat has been more than predetermined analog heat, then illustrates that current torque can cause motor temperature excessively high, should reduce motor at this time
Electric torque reduces the temperature of motor, avoid due to motor powered torque is excessive cause motor temperature excessively high caused by motor
Damage.
In the present embodiment, by real-time monitoring motor powered torque, by motor powered torque and the specified torsion of motor powered
Square is compared, and the simulation heat of motor is adjusted according to comparison result, specifically, motor powered torque is specified greater than motor powered
When torque, increase the simulation heat of motor；When motor powered torque is less than or equal to motor powered nominal torque, motor is reduced
Simulate heat.If the motor simulation heat after increase perhaps reduction is compared increase with default maximum heat or is reduced
Simulation heat afterwards is greater than default maximum heat, then illustrates that current motor electric torque can cause motor temperature excessively high, subtract at this time
The electric torque of small machine can effectively avoid causing motor self-inflicted injury since motor temperature is excessively high.This method passes through mould
To detect motor, whether excess temperature reduces motor powered torque in time and avoids to reduce motor heat quasi- heat when excess temperature
Motor excess temperature.
3rd embodiment
It is described in the application second embodiment and motor simulation heat is adjusted, according to simulation heat according to motor powered torque
The method flow of motor powered torque is adjusted, introduces the application 3rd embodiment below in conjunction with concrete scene.
Referring to Fig. 3, which is the flow chart of 3rd embodiment provided by the present application.Current motor electric torque is motor electricity
Dynamic peak torque, the simulation heat initial value of motor are 0.Realize that specific step is as follows for the embodiment of the present application:
S301: judging whether motor powered torque is greater than motor powered nominal torque, if so, executing step S302, such as
Fruit is no, executes step S303.
Current motor electric torque is motor powered peak torque, and motor powered peak torque is that motor can achieve most
Big electric torque, different from motor powered nominal torque, motor powered peak torque is the experiment value drawn through overtesting, and
Motor powered nominal torque is just set in Motor Production Test, and in general, motor powered peak torque is greater than motor electricity
Dynamic nominal torque.
S302: increase the simulation heat of motor, Buff=Buff+TrqMotorMot*step*RatioHeating。
When the current electric torque that judging result is motor is greater than motor powered nominal torque, increase the simulation heat of motor
Amount.It embodies are as follows:
Buff=Buff+TrqMotorMot*step*RatioHeating
Wherein, Buff is the simulation heat of motor, is the capacity for measuring motor temperature variation.In the present embodiment, mould
The initial value of quasi- heat is 0, it is of course also possible to be other values, the embodiment of the present application to the setting of initial value without limitation.
TrqMotorMotIt is the numerical value of the motor powered torque of real-time monitoring for motor powered torque, in the present embodiment, due to
Motor powered torque is motor powered peak torque, so, when judging for the first time, TrqMotorMot=TrqMotorMotPeak。
Step is preset time parameter, and step can be numerical value relevant to the period for detecting current electric torque, for example,
Primary current electric torque is detected within every 5 minutes, then step=5.Certainly, step be also possible to according to other modes can actually
Parameter.RatioHeatingIt is default heating coefficient, step and RatioHeatingIt is the constant greater than zero.Increased heat is to work as
The product of preceding torque and time parameter and the coefficient that heats up.It, can be by step*Ratio when calculating increased heatHeatingIt regards as
One coefficient, variable are current motor powered torques, i.e., increased heat is directly proportional to motor powered torque.
S303: motor simulation heat, Buff=Buff-Trq are reducedMotorMot*step*RatioCooling。
When judging result is that the current electric torque of motor is less than motor powered nominal torque, the simulation heat of motor is reduced
Amount, specific implementation are as follows:
Buff=Buff-TrqMotorMot*step*RatioCooling
Wherein, RatioCoolingIt is default coefficient of temperature drop, step is preset time parameter, and step can be current with detection
The period of electric torque relevant numerical value, for example, every 5 minutes detect primary current electric torque, then step=5.It is understood that
, step and RatioCoolingIt is the constant greater than zero.The motor simulation heat of reduction be current motor electric torque with
The product of time coefficient and coefficient of temperature drop.
S304: judge whether the motor simulation heat being adjusted is greater than default maximum heat.If so, executing step
S305, if it is not, executing step S306.
S305: adjustment motor powered max. output torque, TrqMotorMotMax=TrqMotorMotPeak+(TrqMotorMotPeak-
TrqMotorMotRated)*max(-1,(Buffmax-Buff)/BuffMax) wherein, TrqMotorMotMaxFor motor maximum electric torque,
TrqMotorMotPeakFor the motor powered peak torque being obtained ahead of time, TrqMotorMotRatedFor motor powered nominal torque, BuffMax
To preset maximum heat, Buff is the simulation heat.
When simulation heat adjusted is more than default maximum heat, the maximum electric torque of motor is reduced.It can manage
Solution, in above-mentioned adjustment mode, (Buffmax-Buff)/BuffMaxWith max (- 1, (Buffmax-Buff)/BuffMax)
For minus numerical value.
As max (- 1, (Buffmax-Buff)/BuffMax) value be -1 when, illustrate that Buff value alreadys exceed default maximum heat
Twice of amount, at this point, motor heat is excessively high, needs quickly to reduce motor heat, is directly limited to motor maximum electric torque
Motor powered nominal torque, it may be assumed that TrqMotorMotMax=TrqMotorMotRated.As max (- 1, (Buffmax-Buff)/BuffMax)
Value is (Buffmax-Buff)/BuffMaxWhen, for example, (Buffmax-Buff)/BuffMax=-0.5 illustrates that the value of Buff does not surpass
Twice for crossing default maximum heat at this point it is possible to carry out slow cooling to motor, that is, slowly adjusts the electric torsional of motor
Square, i.e. TrqMotorMotMax=0.5* (TrqMotorMotRated+TrqMotorMotPeak) > TrqMotorMotRated。
S306: setting motor max. output torque is motor powered nominal torque, TrqMotorMotMax=TrqMotorMotPeak。
When motor simulation heat is not above default maximum heat, although illustrating that motor work at this time is turned round in motor powered
Square is the state of motor powered peak torque, but does not cause motor temperature excessively high, and motor can still continue to operate in
Under the state, therefore, setting motor maximum electric torque is motor powered peak torque.
It should be noted that motor can work long hours when motor powered torque is motor powered nominal torque
Without causing motor temperature excessively high under the state.But motor can not work long hours under peak state, i.e., motor is electric
Dynamic torque cannot be equal to motor powered peak torque for a long time.The process of motor work is the process of an accumulation of heat, motor
When just beginning operating in peak state, motor temperature can't be caused at once excessively high, but when work is at one section of peak state
Between after, just motor temperature can be caused excessively high.Such as: the detection cycle of motor powered torque is 5 minutes, and motor powered torque is
Motor powered peak torque, in motor work at first 20 minutes of peak state, although Buff value adds up always, it is not
Default maximum heat is had more than, at this time, setting motor maximum electric torque is still motor powered peak torque.With work
The growth of time, accumulation of heat is more and more, and when simulating heat greater than default maximum heat, then motor cannot be further continued for work
Under peak state, at this point, motor powered torque should be adjusted, motor temperature is reduced, is avoided as caused by motor overheating
Motor damage.It is understood that can also be stepped up motor powered torque after motor temperature reduction, make motor work
Make in more efficient state.
In the present embodiment, the initial electric torque of motor is motor powered peak torque, passes through simulated machine electric torsional
The variation of motor heat when square is motor peak torque reduces motor electricity when motor simulation heat is more than default maximum heat
Dynamic torque reduces motor temperature, and the motor as caused by motor overheating is avoided to damage.It, can also be with after motor temperature reduction
It is stepped up the electric torque of motor, makes motor work in more efficient state.Through this embodiment, electricity can not only be prevented
Machine temperature is excessively high, and motor can also be made to work on the basis of temperature is not above motor resistance to temperature value in more efficient state.
Fourth embodiment
Since motor both can be used as motor, generator can also be used as.When motor is as motor, output is
The case where electric torque, what above embodiments were introduced is by motor powered torque monitoring temperature.Below with reference to specific implementation
Example is introduced when motor is as generator, the case where by power generation torque monitoring temperature.
Referring to fig. 4, which is the flow chart of fourth embodiment provided by the present application.The step of realizing the present embodiment is as follows:
S401: when judging that electric power generation torque is less than Rated motor power generation torque, increasing the simulation heat of motor, increased
It is directly proportional to the absolute value of electric power generation torque to simulate heat.
Under normal circumstances, when the engine of hybrid vehicle is as power source, what motor can convert engine
Some mechanical can be converted into power storage in battery, that is to say, that in this case, the motor work of hybrid vehicle
Make in generating state.It is understood that it is that mechanical energy is converted to electric energy that motor work is corresponding in generating state, with motor work
Make to convert electric energy to mechanical energy on the contrary, electric power generation torque is a negative in motoring condition.
As soon as motor of hybrid power automobile generates electricity, nominal torque is a fixed value, is set when being Motor Production Test, this
Value is not changed by external factor and the operating status of hybrid vehicle.
If electric power generation torque is electric power generation nominal torque, generally motor temperature will not be caused excessively high, when motor
When power generation torque is less than electric power generation nominal torque, it is, the absolute value of electric power generation torque is greater than the specified torsion of electric power generation
When the absolute value of square, then corresponding motor temperature may be caused to change, may specifically show as motor temperature raising.It can manage
Solution has proportionate relationship, if the absolute value of electric power generation torque between raised temperature and the power generation torque of current motor
Bigger, then raised temperature is more, that is, raised temperature is directly proportional to the absolute value of electric power generation torque.
In the present embodiment, real-time monitoring electric power generation torque judges electric power generation torque and electric power generation nominal torque
Size, when electric power generation torque be less than electric power generation nominal torque when, increase the simulation heat of motor, since heat can not be straight
Detection is connect, therefore, heat is obtained by simulation in the present embodiment.Simulation heat is used for the mistake that simulated machine heat is built up
Journey.The increase simulation heat can be understood as current motor temperature and be increased.Increase the simulation heat and current prison of part
The absolute value of the electric power generation torque measured is directly proportional, and the absolute value of the currently monitored electric power generation torque arrived is bigger, increased
Simulation heat is more, and the absolute value of the currently monitored electric power generation torque arrived is smaller, and increased simulation heat is smaller.
S402: when the simulation heat after judgement increase is greater than default maximum heat, electric power generation torque is reduced.
Default maximum heat is pre-set value, when the simulation heat after increase is greater than default maximum heat, can be drawn
Electrizer heat is excessively high, therefore, it is necessary to be adjusted electric power generation torque, is embodied as reducing the power generation torque of motor
Absolute value avoids motor heat excessively high.
In S401 by real-time detection to electric power generation torque be compared with electric power generation nominal torque, judge motor send out
When electric torque is less than motor powered nominal torque, increase motor simulation heat.It is understood that due to electric power generation torque
Benchmark is electric power generation nominal torque, then it is electric power generation volume that default maximum heat, which can be according to electric power generation torque,
It is arranged on the basis of motor heat when determining torque.
Such as: when electric power generation torque is electric power generation nominal torque, corresponding motor temperature is 35 DEG C, works as motor temperature
Then think that motor temperature is excessively high when more than 45 DEG C, default maximum heat can be motor temperature and increase 10 DEG C of corresponding heats.
Certainly, default maximum heat is also related with the motor heat resistance of hybrid vehicle itself, and motor heat resistance is better, then in advance
If maximum heat may be bigger.The present embodiment to default maximum heat without limitation.It is understood that since electric power generation is turned round
Square is a negative, and the absolute value that electric power generation torque refers to reducing electric power generation torque is reduced in the application.Such as: motor
Power generation peak torque be -9.0Nm, the power generation torque of motor is reduced to -8.0Nm.
In the present embodiment, by real-time monitoring electric power generation torque, by electric power generation torque and the specified torsion of electric power generation
Square is compared, and the simulation heat of motor is adjusted according to comparison result, specifically, electric power generation torque is specified less than electric power generation
When torque, increase the simulation heat of motor.Motor simulation heat after increase is compared with default maximum heat, if increasing
Simulation heat afterwards is greater than default maximum heat, then illustrates that current motor power generation torque can cause motor temperature excessively high, drop at this time
Low electric power generation torque, the i.e. absolute value of the power generation torque of reduction motor, can effectively avoid making since motor temperature is excessively high
At motor self-inflicted injury.By simulation heat, to detect motor, whether excess temperature reduces electric power generation when excess temperature to this method in time
Torque avoids motor excess temperature to reduce motor heat.
5th embodiment
In view of electric power generation torque is not necessarily smaller than electric power generation nominal torque, the application is introduced below in conjunction with Fig. 5
Five embodiments.
Referring to Fig. 5, which is the flow chart of the 5th embodiment provided by the present application, realizes the specific steps of the present embodiment such as
Under:
S501: judging whether electric power generation torque is less than motor powered nominal torque, if so, step S502 is executed, if it is not,
Execute step S503.
S502: increasing the simulation heat of motor, and increased simulation heat is directly proportional to electric power generation torque.
In the present embodiment S501 and S502 respectively in example IV S401 and S402 it is identical, particular content may refer to
The description section of related content in the application fourth embodiment, details are not described herein.
S503: reducing the simulation heat of motor, and the absolute value of the simulation heat and electric power generation torque of reduction is inversely proportional.
When the power generation torque of motor is more than or equal to electric power generation nominal torque, it is, electric power generation torque
When absolute value is less than or equal to the absolute value of electric power generation nominal torque, then corresponding motor temperature may be caused to change,
Motor temperature reduction may specifically be shown as.It is understood that having between the power generation torque of reduced temperature and current motor
Proportional relationship, if the absolute value of electric power generation torque is bigger, reduced temperature is fewer, that is, raised temperature and motor are sent out
The absolute value of electric torque is inversely proportional.S504: when judgement simulation heat is greater than default maximum heat, electric power generation torque is reduced.
It is understood that simulation heat here refers to the simulation heat after being adjusted, for example, working as the hair of motor
When electric torque is less than electric power generation nominal torque, increase the simulation heat of motor, simulation heat here refers to after increasing
Simulate heat.For example, reducing the simulation heat of motor when the power generation torque of motor is more than or equal to electric power generation nominal torque
Amount, simulation heat here refer to the simulation heat after reducing.
After if the simulation heat after increase perhaps reduction is compared increase with default maximum heat or is reduced
Simulating heat has been more than default maximum heat, then illustrates that current torque can cause motor temperature excessively high, should reduce motor at this time
Power generation torque, that is, reduce electric power generation torque absolute value, reduce the temperature of motor, avoid since electric power generation torque is excessive
Cause that motor temperature is excessively high and motor is caused to damage.
In the present embodiment, by real-time monitoring electric power generation torque, by electric power generation torque and the specified torsion of electric power generation
Square is compared, and the simulation heat of motor is adjusted according to comparison result, specifically, electric power generation torque is specified less than electric power generation
When torque, increase the simulation heat of motor；When electric power generation torque is more than or equal to electric power generation nominal torque, motor is reduced
Simulate heat.If the motor simulation heat after increase perhaps reduction is compared increase with default maximum heat or is reduced
Simulation heat afterwards is greater than default maximum heat, then illustrates that current motor power generation torque can cause motor temperature excessively high, drop at this time
Low electric power generation torque reduces the absolute value of electric power generation torque, can effectively avoid causing since motor temperature is excessively high
Motor self-inflicted injury.This method detects motor by simulation heat, and whether excess temperature reduces electric power generation in time and turns round when excess temperature
Square avoids motor excess temperature to reduce motor heat.
Sixth embodiment
The 5th embodiment of the application describe according to electric power generation torque adjust motor simulation heat, according to simulation heat come
The method flow for adjusting electric power generation torque, the application sixth embodiment is introduced below in conjunction with concrete scene.
Shown in Figure 6, which is the flow chart of sixth embodiment provided by the present application.Current motor power generation torque is electricity
Machine power generation peak torque, the simulation heat initial value of motor are 0.Realize that specific step is as follows for the present embodiment:
S601: judging whether electric power generation torque is less than electric power generation nominal torque, if so, step S602 is executed, if it is not,
Execute step S603.
Current motor power generation torque is electric power generation peak torque, and electric power generation peak torque is that motor can achieve most
Big power generation torque, different from electric power generation nominal torque, electric power generation peak torque is the experiment value drawn through overtesting, and
Electric power generation nominal torque is just set in Motor Production Test, and in general, the absolute value of electric power generation peak torque is big
In the absolute value of electric power generation nominal torque.
S602: increase the simulation heat of motor, Buff=Buff-TrqMotorGen*step*RatioHeating。
When judging result is that the current electric torque of motor is less than motor powered nominal torque, increase the simulation heat of motor
Amount.It embodies are as follows:
Buff=Buff-TrqMotorGen*step*RatioHeating
Wherein, Buff is the simulation heat of motor, is the capacity for measuring motor temperature variation.In the present embodiment, mould
The initial value of quasi- heat is 0, it is of course also possible to be other values, the embodiment of the present application to the setting of initial value without limitation.
TrqMotorGenIt is the numerical value of the electric power generation torque of real-time monitoring for electric power generation torque, in the present embodiment, by
In electric power generation torque be electric power generation peak torque, so, for the first time when judging, TrqMotorGen=TrqMotorGenPeak。
Step is preset time parameter, and step can be numerical value relevant to the period for detecting current power generation torque, for example,
Primary current power generation torque is detected within every 5 minutes, then step=5.Certainly, step is also possible to the ginseng determined according to other modes
Number.RatioHeatingIt is default heating coefficient, step and RatioHeatingIt is the constant greater than zero.Increased heat is current
The product of power generation torque and preset time parameter and default heating coefficient.It, can be by step* when calculating increased heat
RatioHeatingRegard a coefficient as, variable is current electric power generation torque, it is contemplated that electric power generation torque is one and is less than
Zero numerical value, so increased heat is directly proportional to the absolute value of electric power generation torque.
S603: motor simulation heat, Buff=Buff+Trq are reducedMotorGen*step*RatioCooling。
When judging result is that the current power generation torque of motor is more than or equal to electric power generation nominal torque, motor is reduced
Heat is simulated, is embodied are as follows:
Buff=Buff+TrqMotorGen*step*RatioCooling
Wherein, RatioCoolingIt is default coefficient of temperature drop, step is preset time parameter, and step can be current with detection
The period of power generation torque relevant numerical value, for example, every 5 minutes detect primary current power generation torque, then step=5.It is understood that
, step and RatioCoolingIt is the constant greater than zero.The motor simulation heat of reduction is current motor power generation torque
The product of absolute value and time coefficient and coefficient of temperature drop.
S604: judge whether the motor simulation heat being adjusted is greater than default maximum heat.If so, executing step
S605, if it is not, executing step S606.
S605: adjustment electric power generation max. output torque, TrqMotorGenMax=TrqMotorGenPeak+(TrqMotorGenPeak-
TrqMotorGenRated)*max(-1,(Buffmax-Buff)/BuffMax) wherein, TrqMotorGenMaxFor motor maximum generation torque,
TrqMotorGenPeakFor the electric power generation peak torque being obtained ahead of time, TrqMotorGenRatedFor electric power generation nominal torque, BuffMax
To preset maximum heat, Buff is the simulation heat.When simulation heat adjusted is more than default maximum heat, by motor
Maximum generation torque reduce.It is understood that in above-mentioned adjustment mode, (Buffmax-Buff)/BuffMaxWith max (-
1,(Buffmax-Buff)/BuffMax) it is minus numerical value.
Whenmax(-1,(Buffmax-Buff)/BuffMax) value be -1 when, it is default to illustrate that the value of Buff alreadys exceed at this time
Twice of maximum heat needs quickly to reduce motor heat, directly by motor maximum generation torque at this point, motor heat is excessively high
It is limited to electric power generation nominal torque, it may be assumed that TrqMotorGenMax=TrqMotorGenRated.Return step S601, periodic cycle are held
Row subsequent step.
As max (- 1, (Buffmax-Buff)/BuffMax) value be (Buffmax-Buff)/BuffMaxWhen, for example,
(Buffmax-Buff)/BuffMax=-0.5, illustrates at this time, and the value of Buff is not above twice of default maximum heat, at this point,
Slow cooling can be carried out to motor, that is, slowly adjust the power generation torque of motor, i.e. TrqMotorGenMax=0.5*
(TrqMotorGenRated+TrqMotorGenPeak) < TrqMotorGenRated。
S606: setting motor maximum generation torque is electric power generation nominal torque, TrqMotorGenMax=TrqMotorGenPeak。
When motor simulation heat is not above default maximum heat, although illustrating that motor work at this time is turned round in electric power generation
Square is the state of electric power generation peak torque, but does not cause motor temperature excessively high, then, motor can still continue work
Make in this state, therefore, setting motor maximum generation torque is electric power generation peak torque.
It should be noted that motor can work long hours when electric power generation torque is electric power generation nominal torque
Without causing motor temperature excessively high under the state.But motor can not work long hours in peak state, i.e. electric power generation
Torque cannot be equal to electric power generation peak torque for a long time.The process of motor work is the process of an accumulation of heat, and motor is rigid
When beginning operating in peak state, motor temperature can't be caused at once excessively high, but motor work is at one section of peak state
Between after, motor temperature can be caused excessively high.Such as: electric power generation torque is electric power generation peak torque, is worked in motor at peak
First 30 minutes of state of value, although Buff value adds up always, motor simulation heat is not above default maximum heat, this
When, setting motor maximum generation torque is electric power generation peak torque.With the growth of working time, accumulation of heat is increasingly
More, when simulating heat greater than default maximum heat, motor cannot be further continued for work under peak state, at this point, should adjust
The power generation torque of motor reduces motor temperature, and the motor as caused by motor overheating is avoided to damage.It is understood that in electricity
After machine temperature reduces, it can also be stepped up the absolute value of the power generation torque of motor, make motor work in more efficient shape
State.
In the present embodiment, the initial power generation torque of motor is electric power generation peak torque, is generated electricity and is turned round by simulated machine
The variation of motor heat when square is electric power generation peak torque reduces electricity when motor simulation heat is more than default maximum heat
Machine power generation torque reduces the absolute value of electric power generation torque, reduce motor temperature, avoid the motor as caused by motor overheating
Damage.After motor temperature reduction, it can be stepped up the absolute value of the power generation torque of motor, imitate motor work in power generation
The higher state of rate.Through this embodiment, not only motor temperature can be prevented excessively high, motor can also be made to be not above in temperature
It works on the basis of the resistance to temperature value of motor in more efficient state.
7th embodiment
The application also provides a kind of mixing dynamical vehicle torsional moment control device, and shown in Figure 7, which provides for the application
The 7th embodiment apparatus structure schematic diagram.The device includes: electric torque judging unit 710, simulation heat adding unit
720, simulating heat judging unit 730 and electric torque reduces unit 740.
Electric torque judging unit 710: for judging whether the electric torque of the hybrid vehicle detected is greater than electricity
Dynamic nominal torque.
Simulation heat adding unit 720: when electric torque judging unit 710 judges that motor powered torque is greater than motor powered
When nominal torque, increase the simulation heat of motor.
When motor powered torque is greater than motor powered nominal torque, corresponding is the process that motor heat gradually accumulates,
At this point, increasing the simulation heat of motor, increased simulation heat is directly proportional to motor powered torque.For example, motor powered torque
Bigger, increased simulation heat is more.The adjustment mode of physical simulation heat may refer to the application 3rd embodiment, herein not
It repeats again.
Simulation heat judging unit 730: for judging whether the simulation heat after increasing is greater than default maximum heat.It is default
Maximum heat is the embodiment of motor heat resistance, and the heat resistance of motor is better, and corresponding default maximum heat is higher.
Electric torque reduces unit 740: the simulation heat after judging result for simulating heat judging unit 730 is to increase
When greater than default maximum heat, the electric torque of motor is reduced.
When motor simulation heat after increase is greater than default maximum heat, illustrate that motor temperature is excessively high at this time, at this point, needing
Motor powered torque is adjusted, reduce motor powered torque.The specific mode for reducing motor powered torque may refer to
The application 3rd embodiment, details are not described herein.
In the present embodiment, electric torque judging unit compares motor powered torque and motor powered nominal torque
Compared with simulation heat adding unit adjusts the simulation heat of motor according to comparison result, specifically, motor powered torque is greater than motor
When electronic nominal torque, simulation heat adding unit increases the simulation heat of motor.Simulating heat judging unit will be after increase
Motor simulation heat is compared with default maximum heat, if the simulation heat after increasing is greater than default maximum heat, is illustrated
Current motor electric torque is possible to the problem that motor temperature can be caused excessively high, and electric torque reduces unit reduction motor at this time
Electric torque can effectively avoid causing motor self-inflicted injury since motor temperature is excessively high.The device by simulation heat come
Detecting motor, whether excess temperature reduces motor powered torque to reduce motor heat in time and avoids motor excess temperature when excess temperature.
The 8th embodiment of the application
The application also provides a kind of mixing dynamical vehicle torsional moment control device, and shown in Figure 8, which provides for the application
The 8th embodiment apparatus structure schematic diagram.The device includes: power generation torque judging unit 810, simulation heat adding unit
820, simulating heat judging unit 830 and power generation torque reduces unit 840.
Power generation torque judging unit 810: for judging whether the power generation torque of the hybrid vehicle detected is less than hair
Electric nominal torque.
Simulation heat adding unit 820: when power generation torque judging unit 810 judges that electric power generation torque is less than electric power generation
When nominal torque, increase the simulation heat of motor.
When electric power generation torque is less than electric power generation nominal torque, corresponding is the process that motor heat gradually accumulates,
At this point, increasing the simulation heat of motor, increased simulation heat and electric power generation torque have proportionate relationship.Electric power generation torque
It is a negative, increased simulation heat is directly proportional to the absolute value of electric power generation torque.For example, electric power generation torque is absolute
Value is bigger, and increased simulation heat is more.The adjustment mode of physical simulation heat may refer to the application sixth embodiment, herein
It repeats no more.
Simulation heat judging unit 830: for judging whether the simulation heat after increasing is greater than default maximum heat.It is default
Maximum heat is the embodiment of motor heat resistance, and the heat resistance of motor is better, and corresponding default maximum heat is higher.
Power generation torque reduces unit 840: the simulation heat after judging result for simulating heat judging unit 830 is to increase
When greater than default maximum heat, the power generation torque of motor is reduced.
When motor simulation heat after increase is greater than default maximum heat, illustrate that motor temperature is excessively high at this time, at this point, needing
Electric power generation torque is adjusted, reduce electric power generation torque.It is understood that the power generation of reduction motor here is turned round
Square refers to reducing the absolute value of electric power generation torque.The specific mode for reducing electric power generation torque may refer to the application the 6th
Embodiment, details are not described herein.
In the present embodiment, power generation torque judging unit compares electric power generation torque and electric power generation nominal torque
Compared with simulation heat adding unit adjusts the simulation heat of motor according to comparison result, specifically, electric power generation torque is less than motor
When power generation nominal torque, simulation heat adding unit increases the simulation heat of motor.Simulating heat judging unit will be after increase
Motor simulation heat is compared with default maximum heat, if the simulation heat after increasing is greater than default maximum heat, is illustrated
Current motor power generation torque is possible to the problem that motor temperature can be caused excessively high, and power generation torque, which reduces unit, at this time reduces motor
Power generation torque reduces the absolute value of electric power generation torque, can effectively avoid causing motor since motor temperature is excessively high certainly
Body damage.The device detects motor by simulation heat, and whether excess temperature reduces electric power generation torque when excess temperature in time, from
And motor heat is reduced, avoid motor excess temperature.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (10)
1. a kind of mixing dynamical vehicle torsional moment control method characterized by comprising
When judging that motor powered torque is greater than electronic nominal torque, increase the simulation heat of motor；Increased simulation heat and institute
It is directly proportional to state motor powered torque；
When simulation heat after judgement increase is greater than default maximum heat, motor powered torque is reduced.
2. mixing dynamical vehicle torsional moment control method according to claim 1, which is characterized in that further include: described in judgement
When motor powered torque is less than or equal to electronic nominal torque, reduce the simulation heat, reduced simulation heat and the electricity
Electromechanical dynamic torque is inversely proportional.
3. mixing dynamical vehicle torsional moment control method according to claim 1, which is characterized in that further include:
When simulation heat after judging the increase is less than or equal to default maximum heat, set motor powered peak torque to
Motor maximum electric torque.
4. mixing dynamical vehicle torsional moment control method according to claim 1, which is characterized in that the reduction motor powered
Torque, specifically:
TrqMotorMotMax=TrqMotorMotPeak+(TrqMotorMotPeak-TrqMotorMotRated)*max(-1,(BuffMax-Buff)/
BuffMax)
Wherein, TrqMotorMotMaxFor motor maximum electric torque；
TrqMotorMotPeakFor the motor powered peak torque being obtained ahead of time；
TrqMotorMotRatedFor motor powered nominal torque；
Buff is the simulation heat；BuffMaxTo preset maximum heat.
5. a kind of mixing dynamical vehicle torsional moment control method characterized by comprising
When judging that electric power generation torque is less than power generation nominal torque, increase the simulation heat of motor；Increased simulation heat and institute
The absolute value for stating electric power generation torque is directly proportional；
When simulation heat after judgement increase is greater than default maximum heat, electric power generation torque is reduced.
6. mixing dynamical vehicle torsional moment control method according to claim 5, which is characterized in that further include: described in judgement
When electric power generation torque is greater than or equal to power generation nominal torque, reduce the simulation heat, reduced simulation heat and the electricity
The absolute value of machine power generation torque is inversely proportional.
7. mixing dynamical vehicle torsional moment control method according to claim 5, which is characterized in that further include:
When simulation heat after judging the reduction is less than or equal to default maximum heat, set electric power generation peak torque to
Motor maximum generation torque.
8. mixing dynamical vehicle torsional moment control method according to claim 5, which is characterized in that the reduction electric power generation
Torque, specifically:
TrqMotorGenMax=TrqMotorGenPeak+(TrqMotorGenPeak-TrqMotorGenRated)*max(-1,(BuffMax-Buff)/
BuffMax)
Wherein, TrqMotorGenMaxFor motor maximum generation torque；
TrqMotorGenPeakFor the electric power generation peak torque being obtained ahead of time；
TrqMotorGenRatedFor electric power generation nominal torque；
Buff is the simulation heat；BuffMaxTo preset maximum heat.
9. a kind of mixing dynamical vehicle torsional moment control device characterized by comprising
Electric torque judging unit, for judging whether motor powered torque is greater than electronic nominal torque；
Heat adding unit is simulated, for judging that motor powered torque is greater than electronic specified torsion when the electric torque judging unit
When square, increase the simulation heat of motor；Increased simulation heat is directly proportional to the motor powered torque；
Heat judging unit is simulated, for judging whether the simulation heat after increasing is greater than default maximum heat；
Electric torque reduction unit is greater than for the simulation heat after simulation heat judging unit judgement increases and presets most
When big heat, motor powered torque is reduced.
10. a kind of mixing dynamical vehicle torsional moment control device characterized by comprising
Power generation torque judging unit, for judging whether electric power generation torque is less than power generation nominal torque；
Heat adding unit is simulated, for judging that electric power generation torque is less than the specified torsion that generates electricity when the power generation torque judging unit
When square, increase the simulation heat of motor；Increased simulation heat is directly proportional to the absolute value of the electric power generation torque；
Heat judging unit is simulated, for judging whether the simulation heat after reducing is greater than default maximum heat；
Power generation torque reduction unit is greater than for the simulation heat after simulation heat judging unit judgement reduces and presets most
When big heat, electric power generation torque is reduced.
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| US20130151051A1 (en) * | 2011-12-07 | 2013-06-13 | Denso Corporation | Control apparatus for electric rotating machine |
| CN104978477A (en) * | 2014-04-14 | 2015-10-14 | 现代自动车株式会社 | System and method for estimating temperature of rotor of motor |
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