CN202563071U - Electric automobile wheel hub motor testing device - Google Patents

Abstract

An embodiment of the present utility model discloses an electric automobile wheel hub motor testing device. The device comprises a wheel hub motor, an inertia simulation mechanism connected with an output shaft of the wheel hub motor in a transmission way, and a control system connected with the wheel hub motor and used for controlling the operation of the wheel hub motor and measuring working parameters of the wheel hub motor. In the electric automobile wheel hub motor testing device of the embodiment, the inertia simulation mechanism is adopted to simulate working conditions when an electric automobile is started or stopped, a measuring system is adopted to effectively obtaining rotating speed, output torque, current, voltage and other parameter values for drafting various characteristic curves of the wheel hub motor, the precision is high, and the operation is simple and convenient.

Description

A kind of hub motor for electric automobile proving installation

Technical field

The utility model relates to technical field of motors, relates in particular to a kind of hub motor for electric automobile proving installation.

Background technology

Along with the popularization of global electric automobile, the technology of electric automobile is abundant, ripe gradually, and electric automobile also formally moves towards to use from notion, and universal day by day.

Electric automobile generally uses motor to drive, and the mode of driving has mid-motor-driven, wheel hub motor driving etc., can be divided into forerunner, rear-guard, 4 wheel driven etc. again according to the distribution of driving force.

Motor properties is most important concerning electric automobile; The various characteristics curve of motor is the foundation that the electric automobile deviser drives design, and therefore, the wheel hub motor that is applied to electric automobile must possess detailed detecting information; To prove its characteristic, user friendly type selecting and use.

The test board that all kinds of motors are arranged at present on the market; And technological comparative maturity, complete, still, the wheel hub motor test board that is directed to used for electric vehicle is but still blank; Its main cause is that existing wheel hub motor only is used for electric bicycle mostly; Be difficult to find the wheel hub motor that is used for electric automobile on the market, its corresponding supporting testing apparatus has no way of obtaining especially, and then has limited the application of wheel hub motor technology on electric automobile.

The utility model content

The utility model embodiment technical matters to be solved is to provide a kind of hub motor for electric automobile proving installation, to promote the application of wheel hub motor on electric automobile.

In order to solve the problems of the technologies described above; The utility model embodiment has proposed a kind of hub motor for electric automobile proving installation; Comprise wheel hub motor, the inertia simulation mechanism on said wheel hub motor output shaft of being in transmission connection, and link to each other with the control system of controlling said wheel hub motor running and said wheel hub motor running parameter being measured with said wheel hub motor.

Further, said inertia simulation mechanism comprises first cylinder and the second tin roller that is driven by said wheel hub motor, and said second tin roller is connected with a flywheel.

Further, said control system comprises the controller of the said wheel hub motor running of control and the measuring system that said wheel hub motor running parameter is measured.

Further, said measuring system comprises one or more the combination in tachometric survey module, output torque measurement module, voltage measurement module and the current measurement module, wherein:

Said tachometric survey module for said wheel hub motor in the magnetic links that is sticked be connected and produce hall signal to detect the hall signal line of said wheel hub motor rotating speed;

Said output torque measurement module comprises and being connected with the said first cylinder output shaft producing the magnetic powder brake of damping force, and is arranged between said first cylinder and the magnetic powder brake, is used to detect said magnetic powder brake braking torque force to obtain the torque sensor of said wheel hub motor output torque;

Said voltage measurement module comprises the bleeder circuit that is connected in said wheel hub motor voltage output end, and the voltage table that said wheel hub motor voltage output end is carried out voltage measurement;

Said current measurement module comprises the divided circuit that is connected in said wheel hub motor current output terminal, and the reometer that said wheel hub motor current output terminal is carried out current measurement.

Further, said bleeder circuit comprises first resistance and second resistance, and working power is successively through ground connection behind said first resistance, second resistance, is connected said voltage output end between said first resistance and said second resistance.

Further, said divided circuit comprises the 3rd resistance that is connected in said wheel hub motor and ground connection, is connected said current output terminal between said the 3rd resistance and the said wheel hub motor.

Further, between said first cylinder and the torque sensor, be provided with shaft coupling between said torque sensor and the magnetic powder brake.

Further, between said first cylinder and the second tin roller, between said second tin roller and the flywheel all through the belt wheel transmission.

Further, the axle core both sides of said first cylinder and second tin roller are provided with bearing.

The beneficial effect of the utility model embodiment is: a kind of hub motor for electric automobile proving installation is provided; Operating mode when starting or stoping through inertia simulation mechanism analog electric automobile is utilized measuring system accurately to obtain wheel hub motor dependence test parameter and is calculated parameter values such as the rotating speed that is used to draw the related wheel hub motor of wheel hub motor various characteristics curve, output torque, electric current, voltage.The hub motor for electric automobile proving installation testing precision of the utility model embodiment is high, and easy and simple to handle, is easy to apply.

Description of drawings

Fig. 1 is the front view of the hub motor for electric automobile proving installation of the utility model embodiment.

Fig. 2 is the vertical view of the hub motor for electric automobile proving installation of the utility model embodiment.

Fig. 3 is the right view of the hub motor for electric automobile proving installation of the utility model embodiment.

Fig. 4 is the bleeder circuit synoptic diagram of the hub motor for electric automobile proving installation of the utility model embodiment.

Fig. 5 is the divided circuit synoptic diagram of the hub motor for electric automobile proving installation of the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further and to be specified.

Extremely shown in Figure 5 like Fig. 1; The hub motor for electric automobile proving installation of the utility model embodiment comprises wheel hub motor 1, the inertia simulation mechanism on said wheel hub motor 1 output shaft of being in transmission connection, and links to each other with the control system of controlling said wheel hub motor 1 running and said wheel hub motor 1 running parameter being measured with said wheel hub motor 1.

Please refer to Fig. 1 to Fig. 2, said inertia simulation mechanism comprises first cylinder 21 and the second tin roller 22 that is driven by said wheel hub motor 1, and said second tin roller 22 is connected with a flywheel 3; Between said first cylinder 21 and the said second tin roller 22, between said second tin roller 22 and the said flywheel 3 all through belt wheel 4 transmissions.The axle core both sides of said first cylinder 21 and said second tin roller 22 are provided with bearing 5.

Said control system comprises the controller of said wheel hub motor 1 running of control and the measuring system that said wheel hub motor 1 running parameter is measured.

Said measuring system comprises one or more the combination in tachometric survey module, output torque measurement module, voltage measurement module and the current measurement module, wherein:

Said tachometric survey module for said wheel hub motor 1 in the magnetic links that is sticked be connected and produce hall signal to detect the hall signal line of said wheel hub motor 1 rotating speed;

Said output torque measurement module comprises and being connected with said first cylinder, 21 output shafts producing the magnetic powder brake 6 of damping force, and is arranged between said first cylinder 21 and the said magnetic powder brake 6, is used to detect said magnetic powder brake 6 braking torque forces to obtain the torque sensor 7 of said wheel hub motor 1 output torque; Wherein, between said first cylinder 21 and the said torque sensor 7, be provided with shaft coupling 8 between said torque sensor 7 and the said magnetic powder brake 6;

As shown in Figure 4, said voltage measurement module comprises the bleeder circuit that is connected in said wheel hub motor 1 voltage output end, and the voltage table that said wheel hub motor 1 voltage output end is carried out voltage measurement; Wherein, said bleeder circuit comprises first resistance 91 and second resistance 92, and working power is successively through said first resistance 91, second resistance, 92 back ground connection, is connected said voltage output end between said first resistance 91 and said second resistance 92;

As shown in Figure 5, said current measurement module comprises the divided circuit that is connected in said wheel hub motor 1 current output terminal, and the reometer that said wheel hub motor 1 current output terminal is carried out current measurement; Wherein, said divided circuit comprises the 3rd resistance 93 that is connected in said wheel hub motor 1 and ground connection, is connected said current output terminal between said the 3rd resistance 93 and the said wheel hub motor 1.

The hub motor for electric automobile proving installation of the utility model embodiment is mainly used in to be tested the wheel hub motor of electric automobile; Its test target is the various characteristics curve that will obtain said wheel hub motor, like " in the rotating speed-torque characteristics under a certain voltage ", " at the rotating speed-current characteristics under a certain voltage ", " efficiency change under different operating modes ", " overload capacity " or the like.Different occasions needs different characteristic; The hub motor for electric automobile proving installation of the utility model embodiment obtains parameter values such as the rotating speed of wheel hub motor to be tested, output torque, electric current, voltage through testing calculating, to support the drafting of various characteristics curve.

The said proving installation of the utility model embodiment adopts 0V～10V standard signal, and has other industrial control equipment information interfaces, is suitable for connecting all kinds of industrial control equipments and realizes test automatically; Simultaneously, said proving installation also is provided with the manual adjustments unit, and through can manual mode testing with being used of Displaying Meters such as voltage table, reometer, said manual adjustments unit can be adjusting knob, step button etc.

Below, just adopt the hub motor for electric automobile proving installation of the utility model embodiment that rotating speed, output torque, electric current, the obtaining of voltage of said wheel hub motor 1 are set forth.Need to prove that when adopting the said proving installation of the utility model embodiment to test, tested object is whole for the wheel that in the wheel hub of wheel 10, is provided with said wheel hub motor 1.In addition, because said first cylinder 21 is identical with the shape and the quality of said second tin roller 22, during test, can regards it as whole cylinder 2 and measure calculating.

(1) obtaining of said wheel hub motor 1 rotating speed:

In the said proving installation of the utility model embodiment; The rotating speed of wheel hub motor 1 to be tested can detect through the hall signal of this wheel hub motor 1; Suppose that the magnetic links quantity that is provided with in the wheel hub motor to be tested 1 is K, then this wheel hub motor 1 revolution one figure hall signal line will be exported the pulse in K cycle.Therefore, through detecting the cycle c of hall signal, just can obtain the real-time rotation speed n of this wheel hub motor 1 to be tested, concrete computing formula is following:

$n=\frac{60f}{K}=\frac{60}{\mathrm{Kc}}$ (formula 1-1)

In the formula, f is the frequency of the hall signal of said tested wheel hub motor 1.

(2) obtaining of said wheel hub motor 1 output torque:

As shown in Figure 3, in the said proving installation of the utility model embodiment, the moment of torsion M that said wheel hub motor 1 to be tested produces _mBe assigned in the following object:

A) rotation of said wheel 10 needs the support of moment of torsion, with M _wRepresent this moment of torsion;

B) rotation of said cylinder 2 needs the support of moment of torsion, with M _cRepresent this moment of torsion;

C) rotation of said flywheel 3 needs the support of moment of torsion, with M _fRepresent this moment of torsion;

D) said magnetic powder brake 6 has produced resistance, needs moment of torsion to offset, with M _bRepresent this moment of torsion;

That is to say the moment of torsion M that said wheel hub motor 1 produces _mCan represent with the summation of above four moments of torsion:

M _m=M _w+ 2M _c+ M _f+ M _b(formula 2-1)

M in above-mentioned four moments of torsion _bDirectly measure M by said torque sensor 7 _w, M _c, M _fMoment of inertia I and angular acceleration by separately calculate:

M _w=I _w* α _w(formula 2-2)

M _c=I _c* α _c(formula 2-3)

M _f=I _f* α _f(formula 2-4)

In the formula, the moment of inertia I of said wheel 10, cylinder 2, flywheel 3 _w, I _c, I _fAll can obtain by quality and shape separately.Yet, three's angular acceleration _w, α _c, α _fNeed real-time measurement just can obtain, and they have certain relation.

The angular acceleration of said wheel 10 _wAngular acceleration with said wheel hub motor 1 _mBe the same, because both belong to a rigid body of doing the dead axle rotation.α _mCan obtain by the rotating speed of said wheel hub motor 1, then:

(formula 2-5)

In the formula,

Be the angular velocity of said wheel hub motor 1, n is said wheel hub motor 1 rotating speed, can be obtained by said formula 1-1, re-uses numerical differentiation and obtains its derivative, α _c, α _fWith α _wBe directly proportional, the relation derivation between them is following:

(formula 2-6)

In the formula,

Angular velocity for said cylinder 2; v _wBe said wheel 10 edge line speed, R _wBe said wheel 10 radiuses; v _cBe said cylinder 2 edge line speed, R _cBe said cylinder 2 radiuses, because said wheel 10 is pressing said cylinder 2, both are non-slip under the normal condition, therefore have:

v _w=v _c(formula 2-7)

Can obtain following formula by said formula 2-6 and said formula 2-7:

$\frac{{\mathrm{\α}}_w}{{\mathrm{\α}}_c}=\frac{R_c}{R_w}\×\frac{{\mathrm{Dv}}_w/\mathrm{Dt}}{{\mathrm{Dv}}_c/\mathrm{Dt}}=\frac{R_c}{R_w}\×\frac{{\mathrm{Dv}}_c/\mathrm{Dt}}{{\mathrm{Dv}}_c/\mathrm{Dt}}=\frac{R_c}{R_w}\⇒{\mathrm{\α}}_c={\mathrm{\α}}_w\×\frac{R_w}{R_c}$ (formula 2-8)

In like manner have:

${\mathrm{\&alpha;}}_f={\mathrm{\&alpha;}}_c\&times;\frac{R_{p1}}{{\mathrm{<figure-callout\; id="2"\; label="R\; p"\; filenames="HDA0000147980440000021.png"\; state="\{\{state\}\}">R</figure-callout>}}_p}={\mathrm{\&alpha;}}_w\&times;\frac{R_w}{R_c}\&times;\frac{R_{p1}}{{\mathrm{<figure-callout\; id="2"\; label="R\; p"\; filenames="HDA0000147980440000021.png"\; state="\{\{state\}\}">R</figure-callout>}}_p}={\mathrm{\&alpha;}}_w\&times;\frac{R_w{R}_{p1}}{R_c{R}_{p2}}$ (formula 2-9)

R in the formula _P1For with the radius of the driving pulley 401 of the said belt wheel 4 that is connected said cylinder 2 output shafts, R _P2For with the radius of the driven pulley 402 of the said belt wheel 4 that is connected said flywheel 3 output shafts.

In sum, the output torque M of said wheel hub motor 1 _mCan obtain by following formula:

$M_m=M_w+2M_c+M_f+M_b$

$=I_w{\mathrm{\&alpha;}}_w+2I_c{\mathrm{\&alpha;}}_c+I_f{\mathrm{\&alpha;}}_f+M_b$

$=I_w{\mathrm{\&alpha;}}_w+2I_c{\mathrm{\&alpha;}}_w\frac{R_w}{R_c}+I_f{\mathrm{\&alpha;}}_w\frac{R_w{R}_{p1}}{R_c{R}_{\mathrm{<figure-callout\; id="2"\; label="p"\; filenames="HDA0000147980440000021.png"\; state="\{\{state\}\}">p</figure-callout>}2}}+M_b$

$=M_b+(I_w+\frac{2R_w}{R_c}{I}_c+\frac{R_w{R}_{p1}}{R_c{R}_{p2}}{I}_f){\mathrm{\&alpha;}}_w$

$=M_b+\frac{\mathrm{\&pi;}}{30}(I_w+\frac{2R_w}{R_c}{I}_c+\frac{R_w{R}_{p1}}{R_c{R}_{p2}}{I}_f)\mathrm{Dn}/\mathrm{Dt}$ (formula 2-10)

(3) said wheel hub motor 1 voltage obtains

Said wheel hub motor 1 is a DC power supply, and the measuring principle of its voltage is fairly simple, and is as shown in Figure 4, but the bleeder circuit among the figure can be reduced to sensing range 0V-10V with measured voltage, is resent to said control system.Generally speaking, said wheel hub motor 1 voltage range of used for electric vehicle is very big, do not wait from 48V-200V, and for different voltages with different, can be through regulating said second resistance 92, make V _TestWhen said wheel hub motor 1 does not start, be 5V, supply voltage is quiescent voltage V _Cc, the dynamic electric voltage u when then said wheel hub motor 1 is worked can be calculated by following formula:

$u=\frac{V_{\mathrm{Cc}}}{5}{V}_{\mathrm{Test}}$ (formula 3-1)

(4) said wheel hub motor 1 electric current obtains

The supply current of said wheel hub motor 1 obtains through the Hall-type current sensor measurement; As shown in Figure 5, the output signal and the measured currents size of said Hall-type current sensor are linear, and its range is 100A; Corresponding output 50mA; Said the 3rd resistance 93 through 1k converts voltage signal into, and therefore, the computing formula of current i was following when said wheel hub motor 1 was worked:

$i=\frac{100}{50}\&times;\frac{I_{\mathrm{Test}}}{1}=2I_{\mathrm{Test}}$ (formula 4-1)

The above is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection domain of the utility model.

Claims (9)

1. hub motor for electric automobile proving installation; It is characterized in that; Comprise wheel hub motor, the inertia simulation mechanism on said wheel hub motor output shaft of being in transmission connection, and link to each other with the control system of controlling said wheel hub motor running and said wheel hub motor running parameter being measured with said wheel hub motor.

2. hub motor for electric automobile proving installation as claimed in claim 1 is characterized in that, said inertia simulation mechanism comprises first cylinder and the second tin roller that is driven by said wheel hub motor, and said second tin roller is connected with a flywheel.

3. hub motor for electric automobile proving installation as claimed in claim 2 is characterized in that, said control system comprises the controller of the said wheel hub motor running of control and the measuring system that said wheel hub motor running parameter is measured.

4. hub motor for electric automobile proving installation as claimed in claim 3 is characterized in that, said measuring system comprises one or more the combination in tachometric survey module, output torque measurement module, voltage measurement module and the current measurement module, wherein:

Said tachometric survey module for said wheel hub motor in the magnetic links that is sticked be connected and produce hall signal to detect the hall signal line of said wheel hub motor rotating speed;

Said output torque measurement module comprises and being connected with the said first cylinder output shaft producing the magnetic powder brake of damping force, and is arranged between said first cylinder and the magnetic powder brake, is used to detect said magnetic powder brake braking torque force to obtain the torque sensor of said wheel hub motor output torque;

Said voltage measurement module comprises the bleeder circuit that is connected in said wheel hub motor voltage output end, and the voltage table that said wheel hub motor voltage output end is carried out voltage measurement;

Said current measurement module comprises the divided circuit that is connected in said wheel hub motor current output terminal, and the reometer that said wheel hub motor current output terminal is carried out current measurement.

5. hub motor for electric automobile proving installation as claimed in claim 4; It is characterized in that; Said bleeder circuit comprises first resistance and second resistance; Working power is successively through ground connection behind said first resistance, second resistance, is connected said voltage output end between said first resistance and said second resistance.

6. hub motor for electric automobile proving installation as claimed in claim 4 is characterized in that, said divided circuit comprises the 3rd resistance that is connected in said wheel hub motor and ground connection, is connected said current output terminal between said the 3rd resistance and the said wheel hub motor.

7. hub motor for electric automobile proving installation as claimed in claim 4 is characterized in that, between said first cylinder and the torque sensor, be provided with shaft coupling between said torque sensor and the magnetic powder brake.

8. hub motor for electric automobile proving installation as claimed in claim 2 is characterized in that, between said first cylinder and the second tin roller, between said second tin roller and the flywheel all through the belt wheel transmission.

9. hub motor for electric automobile proving installation as claimed in claim 2 is characterized in that, the axle core both sides of said first cylinder and second tin roller are provided with bearing.

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