CN107862325A - One kind is applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle - Google Patents
One kind is applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle Download PDFInfo
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Abstract
The invention belongs to power system of electric automobile technical field, and in particular to a kind of pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, to solve the problems, such as that it is insufficient that biradical speed motor applies to caused parameter matching on pure electronic cargo vehicle；The present invention gathers whole pure electric vehicle parameter first；Then low base speed motor nominal parameter matching, including rated power P are completedv, rated speed nb, nominal torque Thigh；Finally complete high base speed motor peak parameters matching, including peak power Pmax, peak torque Tmax, peak speed nmax；Complete biradical speed motor parameter matching.One kind is provided and is applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, parameter matching can be carried out to biradical speed motor, the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle proposed is simply clear, with stronger versatility, it is easy to calibrate matching result, greatly reduces match time, reduces matching cost.
Description
Technical field
The invention belongs to power system of electric automobile technical field, and in particular to a kind of pure electronic biradical speed electricity of cargo vehicle
Machine characteristic parameter matching method.
Background technology
Pure electronic cargo vehicle parameter of electric machine matching existing at present is only applicable to single base speed motor substantially, and to biradical speed
Motor research is not mature enough, and the reasonability and the demand power of pure electronic cargo vehicle of the matching of biradical speed motor parameter, driving
Mileage and hundred kilometers of energy consumptions are directly related, farthest improve the practicality of vehicle；So biradical speed motor parameter is matched
The research of method seems particularly significant, can shorten match time, saves matching cost, shortens the automobile research cycle, to electronic vapour
The popularization and long term growth of car are all significant.
The content of the invention
It is an object of the invention to provide one kind to be applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, uses
To solve the problems, such as that it is insufficient that biradical speed motor applies to caused parameter matching on pure electronic cargo vehicle.To realize the mesh
, the technical solution adopted by the present invention is：
One kind is applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, it is characterised in that including following step
Suddenly：
Step 1. gathers whole pure electric vehicle parameter, including：Vehicle is fully loaded with quality m, vehicle wheel base L, automobile barycenter extremely
The distance L of rear shaft center's line2, automobile height of center of mass hg, tire rolling radius r, front face area A, coefficient of air resistance CD, roll
Coefficient f, wheelslip coefficient μ, power train gross efficiency ηt, base ratio i, max. speed vmax, economic speed vi, max. climb slope
αmax, maximum climbing speed va, and 0~vmKm/h acceleration time tm、vmWith tmIt is preset value；
The low base speed motor nominal parameter matching of step 2.：
The matching expression of rated power is：
The matching expression of rated speed：
The matching expression of nominal torque is：
Wherein, δ is correction coefficient of rotating mass；
The high base speed motor peak parameters matching of step 3.：
According to 0~v of automobilemKm/h acceleration time tm, the relational expression for obtaining acceleration a and driving force F is：
And driving force F expression formula is：Wherein,PmaxFor
Peak power；
For speed vbFor cut-point, acceleration a and driving force F relational expression is split and brings motor base speed into and compares Ib：Relational expression can be obtained：
Simultaneously as in motor operation course, power of motor and torque reach maximum simultaneously, that is, meet relational expression：TmaxFor peak torque, with reference to above-mentioned two relational expression draw motor peak power, peak torque with
Motor base speed obtains I than change curve, peak power and peak torque point of intersectionbValue, and then according to relational expression：Match to obtain peak speed nmax；
Meanwhile motor peak parameters are determined by wheelslip：The driving force that driving wheel is subject to is：
Driving torque is：
Wherein, μ is wheelslip coefficient, and L is vehicle wheel base, WfFor the front axle axle load of automobile, L2For automobile barycenter to rear axle
The distance of center line, hgFor automobile height of center of mass；
And then according to peak torque TmaxPeak power P can be matched to obtainmax。
The beneficial effects of the present invention are：One kind is provided and is applied to the pure electronic biradical speed motor parameter match party of cargo vehicle
Method, parameter matching, the pure electronic biradical speed motor characteristic parameter matching method letter of cargo vehicle of proposition can be carried out to biradical speed motor
It is single clear, there is stronger versatility, be easy to calibrate matching result, greatly reduce match time, reduce matching cost.
Brief description of the drawings
Fig. 1 is the biradical speed motor characteristic parameter matching method flow chart that the present invention is applied to pure electronic cargo vehicle.
Fig. 2 is that motor peak power, peak torque and motor base speed compare change curve in the embodiment of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the invention is not limited in these are implemented
Example.
The present invention provides the biradical speed motor characteristic parameter matching method suitable for pure electronic cargo vehicle, pure electronic cargo vehicle
Main parts size have automobile chassis, vehicle body, power accumulator, driven by power control system etc., for orthodox car
The main distinction is to replace engine with motor.Pure electronic cargo vehicle drives electricity mainly by the energy that electrokinetic cell provides
Machine converts electrical energy into mechanical energy and passes to transmission system, drives vehicle wheel rotation to drive vehicle to travel.
Biradical speed motor is the power core of pure electronic cargo vehicle, and its performance and whole vehicle performance are closely related.For
Pure electronic cargo vehicle is driven to high-performance, biradical speed motor must reach certain requirement in performance, usually require that its energy
Enough Fraquent starts, acceleration, deceleration, parking, the dynamic performance requirements of direct torque are high；In low speed or climbing, torque is high, and
When running at high speed, torque is low；Secondly, the speed adjustable range of motor is wide, should be operated in permanent torque area, operate in perseverance again
Power area, while higher operational efficiency must be kept in whole speed adjustable range.
From power performance requirement, the peak power of high base speed motor must simultaneously meet vehicle max. speed, maximum
Climbable gradient and the requirement of acceleration time three, the peak torque of low base speed motor need to meet vehicle low-speed heave-load traveling and accelerated
Demand during starting.
In the present embodiment, the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, comprise the following steps：
1st, whole pure electric vehicle parameter is gathered, including：Vehicle is fully loaded with quality m, vehicle wheel base L, automobile barycenter to rear axle
The distance L of center line2, automobile height of center of mass hg, tire rolling radius r, front face area A, coefficient of air resistance CD, roll coefficient
F, wheelslip coefficient μ, power train gross efficiency ηt, base ratio i, max. speed vmax, economic speed vi, max. climb slope αmax、
Maximum climbing speed va；
2nd, the determination step of the nominal parameter of high base speed motor and low base speed motor is：
The speed frequency of the conventional driving cycle of analysis obtains the high frequency section of car speed, and it is important to obtain parameter matching four
Principle：(1) high base speed motor should meet steady-state power demand；(2) low base speed motor should meet transient power requirement；(3) Gao Ji
The high efficiency range of speed motor will be substantially in the range of 35km/h to 55km/h；(4) high efficiency range of low base speed motor is basic
In the range of 0km/h to 20km/h；Steady state power expression formula and transient power are obtained according to matching principle (1) and principle (2)
Expression formula, steady state power determine high base speed motor nominal parameter, and transient power determines low base speed motor nominal parameter：
Steady state power expression formula：
Transient power expression formula：
(3) and principle (4) can obtain the rated speed expression formula of biradical speed motor on principle：
According to statistical average acceleration and average retardation rate, and then the nominal torque of high base speed motor can be calculated：
Wherein, δ is correction coefficient of rotating mass；
3rd, according to 0~v of automobilemKm/h acceleration time tm, the relational expression for obtaining acceleration a and driving force F is：
And driving force F expression formula is：PmaxFor peak power, with motor base
Speed v corresponding to speed pointbFor：
For speed vbFor cut-point, acceleration a and driving force F relational expression are split as two parts：
By speed vb：Compare I with motor base speedb：Bringing into obtain：
According to the peak power P of the base speed point motor when meeting pickup requirementmaxWith torque capacity TmaxCalculate
To motor base speed ratio：
From motor peak power, peak torque and base speed than change curve, as shown in Fig. 2 peak power and peak
Value torque point of intersection can obtain IbValue；
Consider that wheelslip determines motor peak parameters：The driving force that driving wheel is subject to is：
Driving torque is：
Wherein, μ is wheelslip coefficient, and L is vehicle wheel base, WfFor the front axle axle load of automobile, L2For automobile barycenter to rear axle
The distance of center line, hgFor automobile height of center of mass.
According to above parameter matching relationship, the low base speed such as maximum driving force, maximum motor torque, maximum driving torque is tried to achieve
Motor performance parameter；The peak parameters of the nominal parameter of wherein high base speed motor and low base speed are usually true according to overload factor λ
Fixed, rule of thumb its value is generally 2-3 or so,
In the present embodiment, biradical speed motor parameter matching result is as shown in the table：
The foregoing is only a specific embodiment of the invention, any feature disclosed in this specification, except non-specifically
Narration, can alternative features equivalent by other or with similar purpose replaced；Disclosed all features or all sides
Method or during the step of, in addition to mutually exclusive feature and/or step, can be combined in any way.
Claims (1)
1. one kind is applied to the pure electronic biradical speed motor characteristic parameter matching method of cargo vehicle, it is characterised in that comprises the following steps：
Step 1. gathers whole pure electric vehicle parameter, including：Vehicle is fully loaded with quality m, vehicle wheel base L, automobile barycenter to rear axle
The distance L of center line2, automobile height of center of mass hg, tire rolling radius r, front face area A, coefficient of air resistance CD, roll coefficient
F, wheelslip coefficient μ, power train gross efficiency ηt, base ratio i, max. speed vmax, economic speed vi, max. climb slope αmax、
Maximum climbing speed va, and 0~vmKm/h acceleration time tm、vmWith tmIt is preset value；
The low base speed motor nominal parameter matching of step 2.：
The matching expression of rated power is：
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The matching expression of rated speed：
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The matching expression of nominal torque is：
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Wherein, δ is correction coefficient of rotating mass；
The high base speed motor peak parameters matching of step 3.：
According to 0~v of automobilemKm/h acceleration time tm, the relational expression for obtaining acceleration a and driving force F is：
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And driving force F expression formula is：Wherein,PmaxFor peak value
Power；
For speed vbFor cut-point, acceleration a and driving force F relational expression is split and brings motor base speed into and compares Ib：
Relational expression can be obtained：
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Simultaneously as in motor operation course, power of motor and torque reach maximum simultaneously, that is, meet relational expression：TmaxFor peak torque, with reference to above-mentioned two relational expression draw motor peak power, peak torque with
Motor base speed obtains I than change curve, peak power and peak torque point of intersectionbValue, and then according to relational expression：Match to obtain peak speed nmax；
Meanwhile motor peak parameters are determined by wheelslip：The driving force that driving wheel is subject to is：
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Driving torque is：
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Wherein, μ is wheelslip coefficient, and L is vehicle wheel base, WfFor the front axle axle load of automobile, L2For automobile barycenter to rear shaft center
The distance of line, hgFor automobile height of center of mass；
And then according to peak torque TmaxPeak power P can be matched to obtainmax。
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| CN201710989636.7A CN107862325B (en) | 2017-10-23 | 2017-10-23 | Parameter matching method suitable for double-base-speed motor of pure electric truck |
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| CN201710989636.7A CN107862325B (en) | 2017-10-23 | 2017-10-23 | Parameter matching method suitable for double-base-speed motor of pure electric truck |
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| CN110457638A (en) * | 2019-07-26 | 2019-11-15 | 武汉格罗夫氢能汽车有限公司 | A kind of hydrogen fuel cell electric automobile motor system matching process |
| WO2021223594A1 (en) * | 2020-05-07 | 2021-11-11 | 北京理工大学 | Multi-objective optimization method and system for driving system of distributed driving electric vehicle |
| CN114132334A (en) * | 2021-12-02 | 2022-03-04 | 智己汽车科技有限公司 | Method and equipment for acquiring hundred-kilometer acceleration time of vehicle |
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Cited By (5)
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| CN109960854A (en) * | 2019-02-26 | 2019-07-02 | 武汉理工大学 | A kind of pure electric automobile motor parameter and fixed reduction ratio determine method simultaneously |
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| WO2021223594A1 (en) * | 2020-05-07 | 2021-11-11 | 北京理工大学 | Multi-objective optimization method and system for driving system of distributed driving electric vehicle |
| CN114132334A (en) * | 2021-12-02 | 2022-03-04 | 智己汽车科技有限公司 | Method and equipment for acquiring hundred-kilometer acceleration time of vehicle |
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