CN105337549B - Motor driven systems - Google Patents

Motor driven systems Download PDF

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CN105337549B
CN105337549B CN201510859749.6A CN201510859749A CN105337549B CN 105337549 B CN105337549 B CN 105337549B CN 201510859749 A CN201510859749 A CN 201510859749A CN 105337549 B CN105337549 B CN 105337549B
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CN105337549A (en
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王淋
王一淋
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王一淋
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Abstract

The invention discloses a kind of driving system of permanent magnet motor, including:Acquisition module, for obtaining vehicle velocity V, motor rotor position θr, torque instruction valueWith bend information;SOC estimation modules, the SOC estimation S current for obtaining electrokinetic cell;Selecting module, for selecting efficiency optimal drive mode motor;Instruction calculation module, motor d the first command values of shaft current are calculated for efficiency optimal drive mode, weak magnetic type of drive and Direct Torque type of drive to be respectively adoptedWith the command value of q shaft currents firstBend compensating module, rotor-position detection module and voltage vector modulation module.The present invention, which improves, may be such that motor adapts to different road conditions.

Description

Motor driven systems

Technical field

The invention belongs to machine field, more particularly to a kind of motor driven systems.

Background technology

Motor is the major impetus source of electric car, and driving motor of electric vehicle generally uses magneto (PMSM) at present, Compared with electro-magnetic motor, magneto, particularly rare-earth permanent-magnet electric machine have it is simple in construction, it is reliable;Small volume, quality Gently;Small, efficiency high is lost;The shape and size of motor can wait remarkable advantage with versatile and flexible.At present in the type of drive of motor On, using single type of drive, it can not change type of drive according to road conditions, vehicle self-condition etc., such as flat Straight road surface driver wishes the higher speed of acquisition, and for the road surface of hollow, driver wishes to obtain bigger torque, when When battery electric quantity is too low, driver wishes to use more energy efficient type of drive again, and to obtain maximum distance travelled, these will It is irrealizable to ask under single drive mode.

The content of the invention

The defects of for prior art, the invention provides a kind of motor driven systems.

A kind of driving system of permanent magnet motor, including:Acquisition module, for obtaining vehicle velocity V, motor rotor position θr, torque Command valueTraffic information and input motor three-phase electricity flow valuve ia, ib, ic, the traffic information comprise at least straight road conditions, Hollow road conditions and bend information;SOC estimation modules, for obtaining the voltage Us and electric current is signals at electrokinetic cell end, according to institute The mathematical modeling of the electrokinetic cell of foundation, integrated using ampere-hour, state observer and adaptive extended kalman filtering method difference Estimate battery SOC, estimate is weighted, obtains the current SOC estimation S of electrokinetic cell;Selecting module, for estimating When evaluation S is more than the threshold value of setting, when selected road conditions are straight road conditions, weak magnetic type of drive motor is selected;When selected When road conditions are hollow road conditions, Direct Torque type of drive motor is selected;When judgement estimate S is less than or equal to the threshold of setting During value, efficiency optimal drive mode motor is selected;Instruction calculation module, for be respectively adopted efficiency optimal drive mode, Weak magnetic type of drive and Direct Torque type of drive calculate motor d the first command values of shaft currentWith the command value of q shaft currents firstBend compensating module, for calculating d shaft current offsets according to the bend informationWith q shaft current offsetsRoot According to the command value of d shaft currents firstAnd current offset valuesCalculate d the second command values of shaft currentAccording to q axles electricity Flow the first command valueAnd current offset valuesCalculate q the second command values of shaft currentRotor-position detection module, for root Motor rotor position θ is calculated according to three-phase electricity flow valuve ia, ib, ic of input motorr;Voltage vector modulation module, for according to institute State the second command valueSecond command valueWith motor rotor position θrPulsewidth modulation is carried out to inverter.

Optionally, in addition to memory module, the memory module are connected with acquisition module, are pre-stored in the memory module There are the road information of a plurality of road, acquisition module road according to where vehicle present position judges vehicle, from the storage The bend information of the road is read in module.

Optionally, the bend information includes the quantity of bend length, bend curvature and preset distance inner curve;According to The position that the bend information and vehicle got is presently in determines whether vehicle makes a reservation on bend or into bend Distance in or the scheduled time in.

Optionally, the rotor-position detection module, rotor position is calculated according to following formular

θr(k+1)=3θr(k)-3θr(k-1)+θr(k-2)

In formula, K represents k-th state value.

Optionally, the mathematical modeling of the electrokinetic cell is:

In formula, XkRepresent the state vector of battery pack, ykBattery terminal voltage is represented, η is the coulombic efficiency factor, and C holds to be total Amount, E0For full of the open-circuit voltage under electricity condition, R is the internal resistance of cell, K0、K1、K2、K3For battery polarization internal resistance, △ t are sampling week Phase, imkFor current measurement value, iskFor current sensor current drift estimate, W1And W2、VkFor separate white noise, SOC is battery electric quantity, and K represents k-th state value, K=0,1,2,3,4,5 ....

Optionally, the SOC estimation modules, for current integration method, state observer method and adaptive expansion to be respectively adopted Exhibition Kalman filtering method estimates SOC value of battery respectively, obtains SOC state estimation S1, S2, S3, and then S1, S2, S3 are carried out Weighted calculation, obtain final SOC estimation S;

S=ω1S12s23s3 (3)

Wherein ω1、ω2、ω3For weight coefficient, ω123=1.

Optionally, in addition to timing module, the timing module are connected with selecting module, when judge estimate S be less than or Equal to setting threshold value when, timing module starts timing, when timing duration T be more than setting duration T0 after, selecting module is selected Efficiency optimal drive mode motor.

Optionally, in addition to weak magnetic drive module, the weak magnetic drive module include function generator FG1 and FG2, function Generator FG1 and FG2 input are connected with acquisition module, and function generator FG1 output end is connected with first adder, the The output end of one adder is connected with current regulator, and current regulator is connected by second adder with limiter, the limit Width device also and function generator FG2 output end is connected.

Optionally, also d shaft currents first are calculated as follows in bag efficiency optimal drive module, the efficiency optimal drive module Command valueWith the command value of q shaft currents first

In formula, Pe represents motor electromagnetic power, ω caused by per phaserFor motor speed, ψfIron core magnetic linkage is represented, Ls is represented Stator inductance.

Optionally, the bend compensating module, the command value of d shaft currents second is calculated as followsRefer to q shaft currents second Make value

K in formulasd、Ksd、Ksq、Ksq, be proportionality coefficient, L represents bend length, and S represents bend curvature, i.e. bend deviates straight The angle in road.

The beneficial effects of the invention are as follows:By accurate mathematical modeling, estimate SOC value using a variety of methods, obtain more Add accurately SOC value, accurate foundation is provided for the manipulation of electric car;Rotor-position, drop are detected using sensorless technology Low cost;Consider pavement behavior and battery information, adjust the driving side of vehicle in real time according to different pavement behavior Formula so that Vehicle handling to be improved;Consider bend and caused influence is driven on motor, electricity is adjusted after bend is run into Machine exciting current and torque current, so as to ensure that turn during vehicle stability.

Brief description of the drawings

Fig. 1 is the structure chart of motor driven systems of the present invention;

Fig. 2 is weak magnetic driving block diagram;

Fig. 3 is PMSM equivalent circuit diagrams.

Embodiment

In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention Embodiment be described in detail, make the above and other purpose of the present invention, feature and advantage will become apparent from.Complete Identical reference instruction identical part in portion's accompanying drawing.Not deliberately accompanying drawing drawn to scale, it is preferred that emphasis is show this hair Bright purport.

Referring to Fig. 1, in order that vehicle can preferably be driven by obtaining motor so that vehicle can be given under different road conditions and drive Person provides more preferable manipulation/feeling for taking, and the present invention determines the driving mould of vehicle according to the electricity (SOC) of electrokinetic cell first Formula, when selected road conditions are straight road conditions, select weak magnetic type of drive motor;When selected road conditions are hollow road conditions, choosing Determine Direct Torque type of drive motor;When judging that estimate S is less than or equal to the threshold value of setting, selected efficiency is most preferably driven Flowing mode motor, according to bend information adjust vehicle PMSM motors type of drive, so as to improve vehicle it is handling, The comfortableness of seating.

Acquisition module, for obtaining vehicle velocity V, motor rotor position θr, torque instruction valueTraffic information and input motor Three-phase electricity flow valuve ia, ib, ic, the traffic information comprises at least straight road conditions, hollow road conditions and bend information.

Specifically, current sensor can be used to measure three-phase current ia, ib, ic of inverter output, vehicle velocity V respectively Detection have various ways, can be according to the depression amount of gas pedal come calculating torque command valueThese above-mentioned information obtain It is prior art to take, and is repeated no more.

For for example wet and slippery road conditions of some road conditions, straight road conditions, hollow road conditions etc., driver can be easy by observation Solve, can be so that corresponding traffic information be sent to vehicle control system by selection key, these buttons can include wet Cunning, hollow, straight, accumulated snow etc., the present invention in straight road conditions refer to there is no bend in certain distance, and road surface without rise Lie prostrate, in evenness of road surface, such as 2KM, this road conditions are suitable to high vehicle speeds.It is convex that hollow road conditions refer to that road surface has many places Rise and depression, pavement roughness, this road conditions should not run at high speed, it requires that vehicle exports larger torque to overcome the convex of road surface Rise and be recessed.It can not be obtained for bend information driver by observing, it is bent that bend information can include bend length, bend The quantity of degree and preset distance inner curve, such as the quantity of the inner curve in 2 kms.Bend length, curvature and quantity and electricity Machine type of drive is closely bound up, and it affects the handling of vehicle and the comfort taken.Such as larger curvature then need it is low Speed and high torque.

Therefore, the present invention is provided with memory module, it is pre-stored the traffic information of a plurality of road, and acquisition module is according to vehicle Road where present position judges vehicle, the information of the road is read from pre-stored traffic information.The location of vehicle It can be provided by such as global positioning system (GPS).Contained in pre-stored traffic information on this road residing for bend Position, length, curvature and quantity.

Motor rotor position θrIt can be detected by detecting element such as encoder, but detecting element price is higher, and For electric car, detecting element, which is installed in drive system, to be needed to take larger space, installation inconvenience.For this present invention Motor rotor position θ is detected using sensorless detection methodr.PMSM mechanical equation is:

Due to θr=∫ωrDt, therefore formula (1) is rewritable is:

In formula, Te is electromagnetic torque, and Pn is number of pole-pairs, RΩFor damped coefficient, J is rotary inertia, T1For load torque.Formula (2) rotor position is shownrIt is to change according to quadratic polynomial rule, i.e.,:

θr(t)=At2+Bt+C (3)

A, B, C are the coefficient of quadratic polynomial in formula, if the sampling period is T, K represents k-th state value, can by formula (3) Know, rotor position next time can be obtained in rotor position estimate value three times in the past, it is assumed that the K-2 time initial time t estimated =0, then:

θr(k-2)=C (4)

In the initial time of the K-1 times estimation, rotor-position is:

θr(k-1)=AT2+BT+C (5)

Similarly, K times:θr(k)=A (2T)2+B(2T)2+C (6)

Then, in the initial time of K+1 estimation, θrp(k+1)=A (3T)2+B(3T)2+C (7);

A, B, C value can be obtained by formula 4~6, after substituting into formula 7, can be obtained:

θr(k+1)=3 θr(k)-3θr(k-1)+θr(k-2) (8)

Thus can be to obtain motor rotor position θr

SOC estimation modules, for obtaining the voltage Us and electric current is signals at electrokinetic cell end, according to the power electric established The mathematical modeling in pond, is integrated, state observer and adaptive extended kalman filtering method estimate battery SOC respectively using ampere-hour, Estimate is weighted, obtains the current SOC estimation S of electrokinetic cell.

Current sensor can be used, voltage sensor measures the terminal voltage Us and output current of power battery pack respectively is.The mathematical modeling of electrokinetic cell has a variety of at present, such as preferable equivalent model, preferable equivalent model regard the internal resistance of battery as SOC when fixed value, not accounting for the difference of internal resistance of cell when battery charges, discharged, therefore also just can not embodying charging, electric discharge Difference, this model and actual value gap are larger;Thevenin models, it is that parameter is all in circuit the defects of Thevenin models It is definite value, they are SOC functions in fact;RC models, RC models simulated battery more more preferable than Thevenin model energy move Step response, but the temperature effect of battery is have ignored, polarity effect is considered not abundant enough;EMF models and RC models and Thevenin models are compared, and in addition to more considering the dynamic characteristic of battery, also preferably consider chemical polarization concentration polarization Etc. the influence of factor, but it also have ignored temperature effect.Built-up pattern, its discrete state space equation are used for this present invention For:

In formula, Xk represents the state vector of battery pack, and yk represents battery terminal voltage, and η is the coulombic efficiency factor, and C holds to be total Amount, E0 are full of the open-circuit voltage under electricity condition, and R is the internal resistance of cell, and K0, K1, K2, K3 are battery polarization internal resistance, and △ t are sampling Cycle, imk are current measurement value, and isk is current sensor current drift estimate, and W1 and W2, Vk are separate white noise Sound, SOC are battery electric quantity, and K represents k-th state value, K=0,1,2,3,4,5 ....

Then according to the mathematical modeling of battery pack, current integration method, state observer method and adaptive extension is respectively adopted Kalman filtering method estimates SOC value of battery respectively, obtains SOC state estimation S1, S2, S3, then S1, S2, S3 are added Power calculates, and obtains final SOC estimation S.

S=ω1S12s23s3 (11)

Wherein ω1、ω2、ω3For weight coefficient, ω123=1.Using a variety of methods respectively to the lotus of electrokinetic cell Electricity condition SOC estimated, well row weighted calculation of being spouted to estimated result draws final estimate, improves electrokinetic cell SOC estimated accuracy.

Selecting module, when being more than the threshold value of setting for estimate S, when selected road conditions are straight road conditions, select weak magnetic Type of drive motor;When selected road conditions are hollow road conditions, Direct Torque type of drive motor is selected;When judgement is estimated When evaluation S is less than or equal to the threshold value of setting, efficiency optimal drive mode motor is selected.

For electric car, the handling driving that motor is depended primarily on comfortableness that is taking of its vehicle.In order to Preferably handling and comfortableness can be reached, it is necessary to adjust the type of drive of motor in real time according to road conditions, the type of drive of motor Weak magnetic driving, Direct Torque driving etc. can be included, these type of drive can adapt to different road conditions requirements, substantially increase Handling, the drive pattern of this type of drive for adjusting motor in real time according to road conditions can be referred to as intelligent drives pattern.But Under intelligent drives pattern, the operational efficiency of motor is not optimal, when battery electric quantity SOC is too low, if still using intelligence Drive pattern, then the operating range of vehicle will greatly shorten, in order to when battery electric quantity SOC is too low so that electrokinetic cell is full The needs of sufficient normally travel, the present invention in only when judge estimate S be more than setting threshold value when, just into intelligent drives mould Formula, this threshold value can be the 30% of power battery total electricity, i.e., when estimate S is more than the 30% of battery total electricity, then permit Perhaps vehicle enters intelligent drives pattern, when estimate S is less than or equal to 30% then, into efficiency optimal drive pattern.Such as When battery electric quantity residue 50%, vehicle enters intelligent driving pattern, its road conditions selected from input module acquisition driver, if Selected road conditions are straight road conditions, then selecting module selection weak magnetic type of drive, when the road conditions that driver selectes are hollow road conditions When, selecting module selection Direct Torque drive pattern motor operation, with the continuous operation of motor, battery electric quantity declines, When battery electric quantity drops to 30%, selecting module efficiency of selection optimal drive mode motor.

Further, because electrokinetic cell has the phenomenon of " power down ", i.e., larger electricity is obtained from electrokinetic cell when moment During power, now estimate S can be less than its actual electricity, such as when actual electricity residue 35% of vehicle, now moment raising car Driving force, then estimate S can 25% or so, and when again recover driven when, estimate S can rise to 35%, This has resulted in the abnormal of intelligent driving pattern and exited.On the other hand, in order to preferably judge now whether vehicle enter/should move back Going out intelligent driving pattern, the present invention sets a timing module, when judging that estimate S is less than or equal to the threshold value of setting, timing Module starts timing, after timing duration T is more than the duration T0 of setting, if now estimate S is still less than or equal to setting Threshold value, then exit intelligent driving pattern.Duration T0 setting, show the electricity of battery within the time period in lasting reduction, and This reduction is due to not caused by " power down ", so just make it that judgement is more accurate.

Instruction calculation module, for efficiency optimal drive mode, weak magnetic type of drive and Direct Torque driving to be respectively adopted Mode calculates motor d the first command values of shaft currentWith the command value of q shaft currents first

Weak magnetic control is a current PMSM study hotspot, and motor weakens magnetic field can and realizes that high-speed cruising (turns Square also reduces therewith) so that speed adjustable range broadens, and contributes to electric automobile to obtain higher speed, this is in straight road traveling When be highly beneficial.Weak magnetic drive module is as shown in Fig. 2 actual current id and iq are according to the threephase stator electric current detected And rotor positionrObtained by vector, the first command valueWith the command value of q shaft currents firstIt is by FG1 and FG2 roots According toIt is calculated, current regulator and q shaft current limiters, deviation delta i is added in weak magnetic drive module of the inventiond Input, exported as i for current regulatordc, the input of current limiter is FG2 output, amplitude limit value iq1=iqmax-idc, iqmax For set-point.When inverter current adjuster saturation, idcIncrease, q shaft current command values, i are reduced by limiter0With iqmaxFor set-point, its given foundation does not influence for the control of guarantee weak magnetic and normal current control room.

Direct Torque Control is that torque is controlled directly as controlled volume, its essence is the analysis method with space vector, In a manner of stator flux orientation, stator magnetic linkage and electromagnetic torque are directly controlled.This method does not need complicated seat Mark conversion, but the mould of magnetic linkage and the size of torque are calculated directly on motor stator coordinate, and pass through the straight of magnetic linkage and torque Connect the high dynamic performance that PWM pulsewidth modulations and system are realized in tracking.Direct Torque Control has strong robustness, torque dynamic response Speed is fast, suitable for requiring higher potted road surface for direct torque.Currently existing a variety of Study on direct torque control technology, herein Repeat no more.

When estimate S is less than or equal to the threshold value of setting, using efficiency optimal drive mode.The loss master of magneto To derive from stator copper loss and core loss, Fig. 3 is the equivalent circuit for the PMSM for considering core loss, R in figurefRepresent iron core etc. Resistance is imitated, Rs represents stator resistance, E0Counter electromotive force is represented, Ux is voltage corresponding with stator magnetic linkage, and the magnetic linkage is in iron core Produce vortex and magnetic hystersis loss.PMSM motors can be expressed as per mutually loss:

It is real axis to take q axles, and d axles opposite direction is the imaginary axis, then has:

Ux=Uxq-jUxd

Ie=Iq-jId (13)

And

Pe represents motor electromagnetic power, ω caused by per phase in formularFor motor speed, ψfRepresent iron core magnetic linkage.

Ux can be expressed as in Fig. 3:Ux=(E0+IdωrLs)+j(IqωrLs) (15),

Using formula 13-15, to the minimizing of formula 12, can obtain:

This point is motor operation efficiency highest point, by controlling frequency and demagnetizing current to adjust iron loss and copper loss Proportionate relationship so that motor iron loss and copper loss are equal, so as to reach optimal operational efficiency.This is for battery electric quantity When SOC is too low, increase VMT Vehicle-Miles of Travel is favourable.

Bend compensating module, for calculating d shaft current offsets according to the bend informationWith q shaft current offsetsAccording to the command value of d shaft currents firstAnd current offset valuesCalculate d the second command values of shaft currentAccording to institute State the command value of q shaft currents firstAnd current offset valuesCalculate q the second command values of shaft current

Bend information can include the quantity of bend length, bend curvature and preset distance inner curve, such as in 2 kms Inner curve quantity.The driving of bend length, curvature and quantity and vehicle is closely bound up, and it affects the handling of vehicle And security.Such as larger curvature then needs bigger torque and relatively low speed.For this present invention according to bend length L and Bend curvature S carrys out calculating current offset in proportionAnd current offset valuesI.e.:

K in formulasd、Ksd、Ksq、Ksq, be proportionality coefficient, can according to experiment determine, it is determined that minimum principle be ensure vehicle exist Cross it is curved during do not topple.

Further, it is now easy if speed is too high to endanger when the quantity of preset distance inner curve is more than setting value Danger, to this present invention when the quantity of preset distance inner curve is more than setting value, the speed of vehicle is obtained, when speed is more than setting During threshold value, such as 80KM/h, alarm now is sent to driver, reminds driver's slow down.

Voltage vector modulation module, for according to second command valueSecond command valueAnd motor rotor position θrPulsewidth modulation is carried out to inverter.After the second command value is obtained, vehicle ECU calculates respectively touching for inverter to inverter Pulse is sent out, IGBT in inverter is driven by drive circuit, so as to export corresponding electric current, driving PMSM operations.

Many details are elaborated in the above description in order to fully understand the present invention.But above description is only Presently preferred embodiments of the present invention, the invention can be embodied in many other ways as described herein, therefore this Invention is not limited by specific implementation disclosed above.Any those skilled in the art are not departing from the technology of the present invention simultaneously In the case of aspects, all technical solution of the present invention is made using the methods and technical content of the disclosure above many possible Changes and modifications, or it is revised as the equivalent embodiment of equivalent variations.Every content without departing from technical solution of the present invention, according to this The technical spirit of invention still falls within skill of the present invention to any simple modifications, equivalents, and modifications made for any of the above embodiments In the range of the protection of art scheme.

Claims (6)

  1. A kind of 1. driving system of permanent magnet motor, it is characterised in that including:
    Acquisition module, for obtaining vehicle velocity V, motor rotor position θr, torque instruction valueThe three of traffic information and input motor Phase current values ia, ib, ic, the traffic information comprise at least straight road conditions, hollow road conditions and bend information;
    SOC estimation modules, for obtaining the voltage Us and electric current is signals at electrokinetic cell end, according to the electrokinetic cell established Mathematical modeling, is integrated, state observer and adaptive extended kalman filtering method estimate battery SOC respectively using ampere-hour, to estimating Evaluation is weighted, and obtains the current SOC estimation S of electrokinetic cell;
    Selecting module, when being more than the threshold value of setting for estimate S, when selected road conditions are straight road conditions, select weak magnetic driving Mode motor;When selected road conditions are hollow road conditions, Direct Torque type of drive motor is selected;When judgement estimate When S is less than or equal to the threshold value of setting, efficiency optimal drive mode motor is selected;
    Instruction calculation module, for efficiency optimal drive mode, weak magnetic type of drive and Direct Torque type of drive to be respectively adopted Calculate motor d the first command values of shaft currentWith the command value of q shaft currents first
    Bend compensating module, for calculating d shaft current offsets according to the bend informationWith q shaft current offsetsRoot According to the command value of d shaft currents firstAnd current offset valuesCalculate d the second command values of shaft currentAccording to q axles electricity Flow the first command valueAnd current offset valuesCalculate q the second command values of shaft current
    Rotor-position detection module, for calculating motor rotor position θ according to three-phase electricity flow valuve ia, ib, ic of input motorr
    Voltage vector modulation module, for according to second command valueSecond command valueWith motor rotor position θrTo inverse Become device and carry out pulsewidth modulation.
  2. 2. driving system of permanent magnet motor according to claim 1, it is characterised in that also including memory module, the storage Module is connected with acquisition module, is pre-stored with the road information of a plurality of road in the memory module, the acquisition module according to Road where vehicle present position judges vehicle, the bend information of the road is read out of described memory module.
  3. 3. driving system of permanent magnet motor according to claim 1, it is characterised in that the bend information is grown including bend The quantity of degree, bend curvature and preset distance inner curve;The position that bend information and vehicle according to getting are presently in is true Vehicle is determined whether on bend or in the predetermined distance for entering bend or in the scheduled time.
  4. 4. driving system of permanent magnet motor according to claim 1, it is characterised in that the mathematical modeling of the electrokinetic cell For:
    <mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>X</mi> <mi>k</mi> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mfrac> <mrow> <mi>&amp;eta;</mi> <mi>t</mi> </mrow> <mi>C</mi> </mfrac> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mn>1</mn> </mtd> </mtr> </mtable> </mfenced> <msub> <mi>X</mi> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mfrac> <mrow> <mo>-</mo> <mi>&amp;eta;</mi> <mi>&amp;Delta;</mi> <mi>t</mi> </mrow> <mi>C</mi> </mfrac> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> </mtr> </mtable> </mfenced> <msub> <mi>i</mi> <mrow> <mi>m</mi> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> </msub> <mo>+</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>w</mi> <mrow> <mn>1</mn> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>w</mi> <mrow> <mn>2</mn> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>=</mo> <msub> <mi>&amp;Phi;</mi> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <msub> <mi>X</mi> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>&amp;Gamma;</mi> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> <msub> <mi>i</mi> <mrow> <mi>m</mi> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow> </msub> <mo>+</mo> <msub> <mi>w</mi> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced>
    <mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>y</mi> <mi>k</mi> </msub> <mo>=</mo> <msub> <mi>g</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <msub> <mi>X</mi> <mi>k</mi> </msub> <mo>,</mo> <msub> <mi>i</mi> <mrow> <mi>m</mi> <mi>k</mi> </mrow> </msub> <mo>,</mo> <msub> <mi>v</mi> <mi>k</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>=</mo> <msub> <mi>E</mi> <mn>0</mn> </msub> <mo>-</mo> <mi>R</mi> <mrow> <mo>(</mo> <msub> <mi>i</mi> <mrow> <mi>m</mi> <mi>k</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>k</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>-</mo> <msub> <mi>K</mi> <mn>0</mn> </msub> <msub> <mi>SOC</mi> <mi>k</mi> </msub> <mo>-</mo> <mfrac> <msub> <mi>K</mi> <mn>1</mn> </msub> <mrow> <msub> <mi>SOC</mi> <mi>k</mi> </msub> </mrow> </mfrac> <mo>+</mo> <msub> <mi>K</mi> <mn>2</mn> </msub> <mi>l</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>SOC</mi> <mi>k</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>K</mi> <mn>3</mn> </msub> <mi>ln</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msub> <mi>SOC</mi> <mi>k</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <msub> <mi>v</mi> <mi>k</mi> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced>
    In formula, XkRepresent the state vector of battery pack, ykBattery terminal voltage is represented, η is the coulombic efficiency factor, and C is total capacity, E0 For full of the open-circuit voltage under electricity condition, R is the internal resistance of cell, K0、K1、K2、K3For battery polarization internal resistance, △ t are the sampling period, imkFor current measurement value, iskFor current sensor current drift estimate, W1And W2、VkFor separate white noise, SOC is Battery electric quantity, K represent k-th state value, K=0,1,2,3,4,5 ....
  5. 5. driving system of permanent magnet motor according to claim 1, it is characterised in that also including timing module, the timing Module is connected with selecting module, and when judging that estimate S is less than or equal to the threshold value of setting, timing module starts timing, works as meter After Shi Shichang T are more than the duration T0 of setting, selecting module selectes efficiency optimal drive mode motor.
  6. 6. driving system of permanent magnet motor according to claim 1, it is characterised in that described also including weak magnetic drive module Weak magnetic drive module includes function generator FG1 and FG2, and function generator FG1 and FG2 input are connected with acquisition module, Function generator FG1 output end is connected with first adder, and the output end of first adder is connected with current regulator, electric current Adjuster is connected by second adder with limiter, and the limiter also and function generator FG2 output end is connected.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1703816A (en) * 2003-01-24 2005-11-30 三菱电机株式会社 Battery power circuit
CN1830134A (en) * 2003-07-31 2006-09-06 丰田自动车株式会社 Load driver capable of suppressing overcurrent
US7317292B2 (en) * 2003-10-17 2008-01-08 Kabushiki Kaisha Yaskawa Denki AC motor control method and control device
CN101222150A (en) * 2006-10-24 2008-07-16 株式会社电装 Method and apparatus for controlling charging operations for battery

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002335699A (en) * 2001-05-09 2002-11-22 Hitachi Ltd Controller of ac motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1703816A (en) * 2003-01-24 2005-11-30 三菱电机株式会社 Battery power circuit
CN1830134A (en) * 2003-07-31 2006-09-06 丰田自动车株式会社 Load driver capable of suppressing overcurrent
US7317292B2 (en) * 2003-10-17 2008-01-08 Kabushiki Kaisha Yaskawa Denki AC motor control method and control device
CN101222150A (en) * 2006-10-24 2008-07-16 株式会社电装 Method and apparatus for controlling charging operations for battery

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