CN102442221B - Method and device for selecting motor system - Google Patents
Method and device for selecting motor system Download PDFInfo
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- CN102442221B CN102442221B CN201010509229.XA CN201010509229A CN102442221B CN 102442221 B CN102442221 B CN 102442221B CN 201010509229 A CN201010509229 A CN 201010509229A CN 102442221 B CN102442221 B CN 102442221B
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Abstract
The invention provides a method and device for selecting a motor system. The method comprises the following steps of: acquiring a first corresponding relation between various types of power and the rotating speed according to the running condition of an electric automobile; acquiring a second corresponding relation between various torques and the rotating speed according to the running condition of the electric automobile; detecting a first high-efficiency area from the first corresponding relation; detecting a second high-efficiency area from the second corresponding relation; and comprehensively considering selection of the motor system according to the first high-efficiency area and the second high-efficiency area. In the invention, a motor system with a higher matching degree can be selected, so that the motor system can be used for supplying power more effectively in the running process of the entire automobile under different working conditions, more energy is saved, and the driving range of the entire automobile is increased; and under the extreme working condition, motor heating is reduced, so that the service life of a motor battery is prolonged.
Description
Technical field
The present invention relates to electric vehicle engineering, relate in particular to the method and apparatus of selecting electric system.
Background technology
Electric system is the propulsion source of electronlmobil, therefore, selects suitable electric system most important concerning electronlmobil.At present, when selecting the electric system of electronlmobil, only according to the car load basic specification of electronlmobil, calculate, and select electronlmobil according to result of calculation, concrete method comprises: (1), according to electric automobile whole maximum speed, calculates the rating horsepower of electric system demand; (2), according to the conventional speed of a motor vehicle of electronlmobil, calculate the rated speed of rotation of electric system demand; (3), according to the minimum speed of a motor vehicle of electronlmobil, calculate the climbing torque of electric system demand.According to above-mentioned method of calculating, just can calculate rating horsepower, rated speed of rotation and the torque rating of the electric system needing.Afterwards, when selecting electric system, the value of the power in the parameter index of electric system to be selected, rotating speed and torque is mated respectively with the value of the rating horsepower calculating, rated speed of rotation and torque rating, and select the electric system to be selected that matching degree is high.
According to above description, can find out, at present when selecting electric system, thereby only according to the car load basic specification of electronlmobil, calculate the electric system of selecting coupling, that is to say, when selecting electric system, do not consider the operating mode in electric automobile during traveling process, and different operating modes can produce larger impact for electric system, such as, in electric automobile during traveling process, because driving cycle is different, motor speed torque is also in continuous variable condition, operating mode factor has a huge impact the efficiency of electric system, yet the method for current existing selection electric system is just selected according to static electric automobile whole parameter, and according to the operating mode of not considering electronlmobil, therefore, the inefficiency that will inevitably cause the electric system of selection, actv. power cannot be provided, and then reduced the continual mileage of electronlmobil.
And, the method of current existing selection electric system just goes out a concrete numerical value of each parameter for selecting according to static electric automobile whole calculation of parameter, when follow-up selection electric system, only according to parameter a concrete numerical value, select, and in reality, may not have the value of the relevant parameter of electric system to be selected to mate completely with the numerical value calculating, and, even if values match also cannot guarantee the most effective of the electric system selected, thereby make the electric system of selecting that actv. power cannot be provided, and then reduced the continual mileage of electronlmobil.
Summary of the invention
The embodiment of the present invention provides the method and apparatus of selecting electric system, can improve the efficiency of the electric system of selecting.
The method of the selection electric system that the embodiment of the present invention provides, comprising:
According to the operating mode of electric automobile during traveling, obtain the first corresponding relation of various power and rotating speed;
According to the operating mode of electric automobile during traveling, obtain the second corresponding relation of various torque and rotational speed;
From described the first corresponding relation, determine the first efficient district;
From described the second corresponding relation, determine the second efficient district;
According to the described first efficient district and the second efficient district, select electric system.
The first corresponding relation that the described operating mode according to electric automobile during traveling obtains various power and rotating speed comprises:
Obtain the speed v of described electronlmobil different time points under driving cycle
tand acceleration/accel a
t;
According to the speed v of described different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t;
According to power P
t=F
t* v
t, calculate respectively the power P of different time points
t;
According to the speed v of overall gear ratio ig*io and different time points
t, calculate the rotation speed n of different time points
t;
For the power P on each time point
tand rotation speed n
tset up power-speed curves figure.
Described according to the described speed v of different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
tcomprise:
The resistance to motion of each time point is
Wherein, m is the quality of described electronlmobil, and g is acceleration due to gravity, and f is the coefficient of rolling resistance of described electronlmobil, C
dbe the demeanour drag coefficient of described electronlmobil, A is the wind area of described electronlmobil, and δ is the correction coefficient of rotating mass of described electronlmobil.
Described according to the speed v of overall gear ratio ig*io and different time points
tcalculate the rotation speed n of different time points
tcomprise:
The rotating speed of each time point
Wherein, r is the tire radius of described electronlmobil.
The second corresponding relation that the described operating mode according to electric automobile during traveling obtains various torque and rotational speed comprises:
Calculate the torque T of each time point
tfor:
For the torque T on each time point
tand rotation speed n
tset up torque-speed curve figure.
From described the first corresponding relation, determine that the first efficient district comprises:
In described power-speed curves figure, the region that each numerical value centered by the power-handling capability of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as the described first efficient district.
Describedly from described the second corresponding relation, determine that the second efficient district comprises:
In described torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation value of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as the described second efficient district.
Described operating mode of travelling comprises: urban district operation cycle operating mode and/or suburbs operation cycle operating mode.
The device of the selection electric system that the embodiment of the present invention provides, comprise: the first computing module, the second computing module, the first determination module, the second determination module and selection module, wherein, described the first computing module is connected with described the first determination module, described the second computing module is connected with described the second determination module, and described the first determination module is also connected with described selection module respectively with described the second determination module; And,
Described the first computing module, for going out the first corresponding relation of various power and rotating speed according to the condition calculating of electric automobile during traveling;
Described the second computing module, for going out the second corresponding relation of various torque and rotational speed according to the condition calculating of electric automobile during traveling;
Described the first determination module, for determining the first efficient district from described the first corresponding relation;
Described the second determination module, for determining the second efficient district from described the second corresponding relation;
Described selection module, selects electric system according to the described first efficient district and the second efficient district.
Described the first computing module comprises:
Obtain submodule, for obtaining the speed v of described electronlmobil different time points under driving cycle
tand acceleration/accel a
t;
Resistance to motion calculating sub module, for according to the speed v of described different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t;
Power calculation submodule, for according to power P
t=F
t* v
t, calculate respectively the power P of different time points
t;
Revolution counter operator module, for according to the speed v of overall gear ratio ig*io and different time points
t, calculate the rotation speed n of different time points
t;
Diagram of curves generates submodule, is used to the power P on each time point
tand rotation speed n
tset up power-speed curves figure.
Described the second computing module comprises:
Torque calculation submodule, for calculating the torque T of each time point
tfor:
Diagram of curves forms submodule, is used to the torque T on each time point
tand rotation speed n
tset up torque-speed curve figure.
Described the first determination module comprises that first determines submodule, be used at described power-speed curves figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as the described first efficient district.
Described the second determination module comprises that second determines submodule, be used at described torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as the described second efficient district.
Visible, the method and apparatus of the selection electric system proposing in the embodiment of the present invention, thereby not only according to the car load basic specification of electronlmobil, to calculate the electric system of selecting coupling, but calculate power and efficient district corresponding to rotating speed according to the various parameters in electronlmobil Real-road Driving Cycle, the efficient district that torque and rotational speed is corresponding, the requirement of actual condition to the electric system of electronlmobil in electric automobile during traveling process reflected in this efficient district, like this, while selecting electric system according to efficient district, just can guarantee that the electric system of selecting meets requirement of actual working condition, must improve the efficiency of the electric system of selecting, thereby can provide actv. power, and then improved the continual mileage of electronlmobil.
And, the method and apparatus of the selection electric system that the embodiment of the present invention proposes, not to select electric system with a concrete numerical value of each parameter, but select electric system with the efficient district, region that numerical value forms, like this according to a plurality of data selection electric systems in this efficient district rather than only according to a numerical value selection, thereby the efficiency that has improved the electric system of selecting, can provide actv. power, and then improve the continual mileage of electronlmobil.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the basic flow sheet of choosing electric system in the embodiment of the present invention;
Fig. 2 is the diagram of circuit of selecting electric system in a preferred embodiment of the invention;
Fig. 3 is operation cycle working condition chart under a kind of standard typical case transient state driving cycle;
Fig. 4 is a kind of possible power-speed curves figure in the embodiment of the present invention;
Fig. 5 is a kind of possible torque-speed curve figure in the embodiment of the present invention;
Fig. 6 is the basic block diagram of selecting the device of electric system in the embodiment of the present invention;
Fig. 7 is a kind of preferred construction figure that selects the first computing module in the device of electric system in the embodiment of the present invention;
Fig. 8 is a kind of preferred construction figure that selects the second computing module in the device of electric system in the embodiment of the present invention;
Fig. 9 is a kind of constructional drawing of the first determination module and the second determination module in the embodiment of the present invention.
The specific embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention has proposed a kind of method of selecting electric system, and referring to Fig. 1, the method comprises:
Step 101: the first corresponding relation that obtains various power and rotating speed according to the operating mode of electric automobile during traveling.
Step 102: the second corresponding relation that obtains various torque and rotational speed according to the operating mode of electric automobile during traveling.
Step 103: determine the first efficient district from described the first corresponding relation.
Step 104: determine the second efficient district from described the second corresponding relation.
Step 105: select electric system according to the described first efficient district and the second efficient district.
Visible, in the method for the selection electric system proposing in the embodiment of the present invention, thereby not only according to the car load basic specification of electronlmobil, to calculate the electric system of selecting coupling, but calculate power and efficient district corresponding to rotating speed according to the various parameters in electronlmobil Real-road Driving Cycle, the efficient district that torque and rotational speed is corresponding, the requirement of actual condition to the electric system of electronlmobil in electric automobile during traveling process reflected in this efficient district, like this, while selecting electric system according to efficient district, just can guarantee that the electric system of selecting meets requirement of actual working condition, must improve the efficiency of the electric system of selecting, thereby can provide actv. power, and then improved the continual mileage of electronlmobil.
And, in the method for the selection electric system that the embodiment of the present invention proposes, not to select electric system with a concrete numerical value of each parameter, but select electric system with the efficient district, region that numerical value forms, like this according to a plurality of data selection electric systems in this efficient district rather than only according to a numerical value selection, thereby the efficiency that has improved the electric system of selecting, can provide actv. power, and then improve the continual mileage of electronlmobil.
Below in conjunction with an instantiation, describe the implementation procedure of the embodiment of the present invention in detail.
Referring to Fig. 2, in a preferred embodiment of the invention, for electronlmobil, select the process of electric system and specifically comprise the following steps:
Step 201: obtain the data in the operating mode of electric automobile during traveling.
Here, can be that electronlmobil records the various data in driving process when the various operating modes (being various road surfaces) of reality are travelled, thereby obtain the data in the operating mode of the electric automobile during traveling requiring in this step.Or, also can be the data in the operating mode that is directly the electric automobile during traveling that requires in this step by the various data acquisitions of stipulating in operation cycle working condition chart under existing standard typical case transient state driving cycle, wherein, under a kind of standard typical case transient state driving cycle, operation cycle working condition chart can be shown in Figure 3.
In this step, the data of obtaining are preferably the speed v of electronlmobil different time points under driving cycle
tand acceleration/accel a
t.
Step 202: according to the speed v of different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t.
A kind of implementation method of this step is: utilize the speed v on each time point
tand acceleration/accel a
tthe resistance to motion that calculates each time point is F
t, computing formula is
Wherein, m is the quality of described electronlmobil, and g is acceleration due to gravity, and f is the coefficient of rolling resistance of described electronlmobil, C
dbe the demeanour drag coefficient of described electronlmobil, A is the wind area of described electronlmobil, and δ is the correction coefficient of rotating mass of described electronlmobil.
Step 203: according to power P
t=F
t* v
t, calculate respectively the power P of different time points
t.
In this step, be the F that utilizes each time point
tand v
t, calculate the power P of each time point
t.
Step 204: according to the speed v of the parameter overall gear ratio ig*io of electronlmobil and the different time points obtained
t, calculate the rotation speed n of different time points
t.
A kind of specific implementation of this step comprises: utilize the speed v on each time point
tcalculate the rotation speed n of each time point
t, computing formula is
Wherein, r is the tire radius of electronlmobil, and ig*io is the overall gear ratio of electronlmobil.
Step 205: be the power P on each time point obtaining
tand rotation speed n
tset up power-speed curves figure.
So far, the processing by step 201 to step 205, has just realized the corresponding relation that goes out various power and rotating speed according to the condition calculating of electric automobile during traveling, and this corresponding relation embodies by power-speed curves figure.
A kind of form of the power-speed curves figure setting up in this step can be shown in Figure 4.
Step 206: the torque T that calculates each time point
t.
A kind of specific implementation of this step is: the rotation speed n of utilizing each time point
tpower P with each time point
t, calculate the torque T of each time point
t, computing formula is
Step 207: be the torque T on each time point obtaining
tand rotation speed n
tset up torque-speed curve figure.
So far, the processing by above-mentioned steps 206 to step 207, has just realized the corresponding relation that goes out various torque and rotational speed according to the condition calculating of electric automobile during traveling, and this corresponding relation embodies by torque-speed curve figure.
A kind of form of the torque-speed curve figure setting up in this step can be shown in Figure 5.
It should be noted that, in above-mentioned steps, be that the mode by power-speed curves figure embodies the corresponding relation between power and rotating speed, and embody the corresponding relation between Torque and speed by the mode of torque-speed curve figure.In other embodiments of the invention, embody corresponding relation and also can adopt other mode, such as mapping table etc.
Step 208: determine efficient district (being designated as efficient district 1) from the power-speed curves figure of reflection power and rotating speed corresponding relation.
In power-speed curves figure, the region that each numerical value centered by the power-handling capability of electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as efficient district 1.Such as, referring to Fig. 4, when carrying out this step, can first on the ordinate of Fig. 4, find power-handling capability place coordinate, power-handling capability place coordinate is added to 30 and subtract the numerical value that obtains after 60 as the upper lower limit value of ordinate, and this upper lower limit value within the scope of, the region of each ordinate and the formation of each abscissa is as efficient district 1.
Certainly, also can adopt other modes to determine efficient district 1, such as, the complete power-speed curves figure shown in Fig. 4 is defined as to efficient district 1.
Step 209: determine efficient district (being designated as efficient district 2) from the torque-speed curve figure of reflection Torque and speed corresponding relation.
In torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation value of electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as efficient district 2.Such as, referring to Fig. 5, when carrying out this step, can first on the abscissa of Fig. 5, find rated speed of rotation value place coordinate, rated speed of rotation value place coordinate is added to 3000 and subtract the numerical value that obtains after 3000 as the upper lower limit value of abscissa, and this upper lower limit value within the scope of, the region of each abscissa and the formation of each ordinate is as efficient district 2.
Certainly, also can adopt other modes to determine efficient district 2, such as, the complete torque-speed curve figure shown in Fig. 5 is defined as to efficient district 2.
Step 210: consider selection electric system according to efficient district 1 and efficient district 2.
The specific implementation of this step can be: obtain various magnitude of power under the driving cycle that electric system to be selected is corresponding and the corresponding relation of tachometer value, and the corresponding relation of tachometer value and torque value; Each tachometer value of electric system to be selected is mated with the corresponding relation of reflection in efficient district 1 with the corresponding relation of magnitude of power, each tachometer value of electric system to be selected is mated with the corresponding relation of reflection in efficient district 2 with the corresponding relation of torque value, consider efficient district 1 and mate with efficient district 2, select the highest electric system to be selected of matching degree.
The embodiment of the present invention has also proposed a kind of device of selecting electric system, referring to Fig. 6, comprise: the first computing module 601, the second computing module 602, the first determination module 603, the second determination module 604 and selection module 605, wherein, the first computing module 601 is connected with the first determination module 603, the second computing module 602 is connected with the second determination module 604, and the first determination module 603 is also connected with selecting module 605 respectively with the second determination module 604; And,
The first computing module 601, for going out the first corresponding relation of various power and rotating speed according to the condition calculating of electric automobile during traveling;
The second computing module 602, for going out the second corresponding relation of various torque and rotational speed according to the condition calculating of electric automobile during traveling;
The first determination module 603, for determining the first efficient district from described the first corresponding relation;
The second determination module 604, for determining the second efficient district from described the second corresponding relation;
Referring to Fig. 7, in the present invention, to select in the optional embodiment of device of electric system, the first computing module 601 comprises:
Obtain submodule 701, for obtaining the speed v of described electronlmobil different time points under driving cycle
tand acceleration/accel a
t;
Resistance to motion calculating sub module 702, for according to the speed v of described different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t;
Revolution counter operator module 704, for according to the speed v of overall gear ratio ig*io and different time points
t, calculate the rotation speed n of different time points
t;
Diagram of curves generates submodule 705, is used to the power P on each time point
tand rotation speed n
tset up power-speed curves figure.
Referring to Fig. 8, in the present invention, to select in another optional embodiment of device of electric system, the second computing module 602 comprises:
Diagram of curves forms submodule 802, is used to the torque T on each time point
tand rotation speed n
tset up torque-speed curve figure.
Referring to Fig. 9, in the present invention, select in another optional embodiment of device of electric system, the first determination module 603 comprises that first determines submodule 901, be used at described power-speed curves figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as the described first efficient district.Alternatively, first determines that submodule 901 also can adopt other modes to determine the first efficient district, such as, the complete power-speed curves figure obtaining is defined as to the described first efficient district.
Referring to Fig. 9, the second determination module 604 comprises that second determines submodule 902, be used at described torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as the described second efficient district.Alternatively, second determines that submodule 902 also can adopt other modes to determine the second efficient district, such as, the complete torque-speed curve figure obtaining is defined as to the described second efficient district.
In above-mentioned each embodiment of the present invention, the operating mode of electric automobile during traveling can be urban district operation cycle operating mode and/or suburbs operation cycle operating mode.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of programmed instruction, aforementioned program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (13)
1. a method of selecting electric system, is characterized in that, comprising:
According to the operating mode of electric automobile during traveling, obtain the first corresponding relation of various power and rotating speed;
According to the operating mode of electric automobile during traveling, obtain the second corresponding relation of various torque and rotational speed;
From described the first corresponding relation, determine the first efficient district;
From described the second corresponding relation, determine the second efficient district;
According to the described first efficient district and the second efficient district, select electric system;
Describedly according to the described first efficient district and the second efficient district, select electric system to comprise:
Obtain various magnitude of power under the operating mode of the corresponding electric automobile during traveling of electric system to be selected and the corresponding relation of tachometer value, and the corresponding relation of tachometer value and torque value;
By described electric system to be selected described in each tachometer value mate with the corresponding relation in the described first efficient district with the corresponding relation of magnitude of power, obtain the matching result in described electric system to be selected and the described first efficient district;
By described electric system to be selected described in each tachometer value mate with the corresponding relation in the described second efficient district with the corresponding relation of torque value, obtain the matching result in described electric system to be selected and the described second efficient district;
According to the matching result in described electric system to be selected and the described first efficient district, and the matching result in described electric system to be selected and the described second efficient district, from described electric system to be selected, select described electric system.
2. method according to claim 1, is characterized in that, the first corresponding relation that the described operating mode according to electric automobile during traveling obtains various power and rotating speed comprises:
Obtain the speed v of described electronlmobil different time points under driving cycle
tand acceleration/accel a
t;
According to the speed v of described different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t;
According to power P
t=F
t* v
t, calculate respectively the power P of different time points
t;
According to the speed v of overall gear ratio ig*io and different time points
t, the rotation speed n of calculating different time points
t;
For the power P on each time point
tand rotation speed n
tset up power-speed curves figure.
3. method according to claim 2, is characterized in that, described according to the described speed v of different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
tcomprise:
The resistance to motion of each time point is
Wherein, m is the quality of described electronlmobil, and g is acceleration due to gravity, and f is the coefficient of rolling resistance of described electronlmobil, C
dbe the demeanour drag coefficient of described electronlmobil, A is the wind area of described electronlmobil, and δ is the correction coefficient of rotating mass of described electronlmobil.
4. method according to claim 2, is characterized in that, described according to the speed v of overall gear ratio ig*io and different time points
tcalculate the rotation speed n of different time points
tcomprise:
The rotating speed of each time point
Wherein, r is the tire radius of described electronlmobil.
5. method according to claim 1, is characterized in that, the second corresponding relation that the described operating mode according to electric automobile during traveling obtains various torque and rotational speed comprises:
Calculate the torque T of each time point
tfor:
For the torque T on each time point
tand rotation speed n
tset up torque-speed curve figure.
6. method according to claim 2, is characterized in that, determines that the first efficient district comprises from described the first corresponding relation:
In described power-speed curves figure, the region that each numerical value centered by the power-handling capability of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as the described first efficient district.
7. method according to claim 5, is characterized in that, describedly from described the second corresponding relation, determines that the second efficient district comprises:
In described torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation value of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as the described second efficient district.
8. according to the arbitrary described method of claim 1～7, it is characterized in that, described in the operating mode of travelling comprise: urban district operation cycle operating mode and/or suburbs operation cycle operating mode.
9. a device of selecting electric system, it is characterized in that, comprise: the first computing module, the second computing module, the first determination module, the second determination module and selection module, wherein, described the first computing module is connected with described the first determination module, described the second computing module is connected with described the second determination module, and described the first determination module is also connected with described selection module respectively with described the second determination module; And,
Described the first computing module, for going out the first corresponding relation of various power and rotating speed according to the condition calculating of electric automobile during traveling;
Described the second computing module, for going out the second corresponding relation of various torque and rotational speed according to the condition calculating of electric automobile during traveling;
Described the first determination module, for determining the first efficient district from described the first corresponding relation;
Described the second determination module, for determining the second efficient district from described the second corresponding relation;
Described selection module, for selecting electric system according to the described first efficient district and the second efficient district, describedly comprises according to the described first efficient district and second efficient district's selection electric system:
Obtain various magnitude of power under the operating mode of the corresponding electric automobile during traveling of electric system to be selected and the corresponding relation of tachometer value, and the corresponding relation of tachometer value and torque value;
By described electric system to be selected described in each tachometer value mate with the corresponding relation in the described first efficient district with the corresponding relation of magnitude of power, obtain the matching result in described electric system to be selected and the described first efficient district;
By described electric system to be selected described in each tachometer value mate with the corresponding relation in the described second efficient district with the corresponding relation of torque value, obtain the matching result in described electric system to be selected and the described second efficient district;
According to the matching result in described electric system to be selected and the described first efficient district, and the matching result in described electric system to be selected and the described second efficient district, from described electric system to be selected, select described electric system.
10. device according to claim 9, is characterized in that, described the first computing module comprises:
Obtain submodule, for obtaining the speed v of described electronlmobil different time points under driving cycle
tand acceleration/accel a
t;
Resistance to motion calculating sub module, for according to the speed v of described different time points
tand acceleration/accel a
tcalculate the resistance to motion F of different time points
t;
Power calculation submodule, for according to power P
t=F
t* v
tcalculate respectively the power P of different time points
t;
Revolution counter operator module, for according to the speed v of overall gear ratio ig*io and different time points
t, calculate the rotation speed n of different time points
t;
Diagram of curves generates submodule, is used to the power P on each time point
tand rotation speed n
tset up power-speed curves figure.
11. devices according to claim 9, is characterized in that, described the second computing module comprises: torque calculation submodule, and for calculating the torque T of each time point
tfor:
diagram of curves forms submodule, is used to the torque T on each time point
tand rotation speed n
tset up torque-speed curve figure.
12. devices according to claim 10, it is characterized in that, described the first determination module comprises that first determines submodule, be used at described power-speed curves figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described power-speed curves figure is defined as the described first efficient district.
13. devices according to claim 11, it is characterized in that, described the second determination module comprises that second determines submodule, be used at described torque-speed curve figure, the region that each numerical value centered by the rated speed of rotation of described electronlmobil within the scope of the default value of ，Jiang Gai center forms in described torque-speed curve figure is defined as the described second efficient district.
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| CN108983095B (en) * | 2018-07-27 | 2020-08-21 | 北京新能源汽车股份有限公司 | Method and device for testing reliability of driving motor system |
| CN109100651B (en) * | 2018-07-27 | 2020-08-11 | 北京新能源汽车股份有限公司 | Method and device for determining performance of motor system and test equipment |
| CN112026530A (en) * | 2019-11-19 | 2020-12-04 | 长城汽车股份有限公司 | Energy-saving method and device for electric automobile and electric automobile |
| CN112396127B (en) * | 2020-12-04 | 2024-06-11 | 东软睿驰汽车技术（沈阳）有限公司 | Vehicle part type selection method and device and related products |
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