CN103869245B - Magnetic co-energy correction-based switched reluctance motor (SRM) flux linkage curve test method - Google Patents
Magnetic co-energy correction-based switched reluctance motor (SRM) flux linkage curve test method Download PDFInfo
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Abstract
The invention discloses a magnetic co-energy correction-based switched reluctance motor (SRM) flux linkage curve test method and device. The currently used test equipment has the conditions that the test is complex, the test result is not accurate, the flux linkage online test, field test and mass production product test are unavailable, and the like. The magnetic co-energy correction-based SRM flux linkage curve test device comprises an adjustable direct-current regulated power supply (1), wherein the adjustable direct-current regulated power supply is connected with an SRM drive (2); the SRM drive is respectively connected with a three phase SRM (3) and a CAN (Controller Area Network) analyzer (4); the CAN analyzer is connected with a PC (Personal Computer) (5). The magnetic co-energy correction-based SRM flux linkage curve test method and device are suitable for the flux linkage online test, field test and mass production product test without locking the motor rotor position.
Description
Technical field:
The present invention relates to a kind of switched reluctance motor flux linkage curve test method based on magnetic coenergy correction and device.
Background technology:
Switched reluctance machines (switched reluctance motor, abbreviation srm) are that double-salient-pole VR is electronic
Machine.The salient pole of its stator and rotor is formed by stacking by common stalloy.Rotor both no windings and no permanent magnet, stator poles are wound with
Concentratred winding, two windings in series diametrically constitute the two poles of the earth magnetic pole, referred to as " phase ".The motion of srm be by fixed,
Between rotor, the change of air-gap reluctance produces.Based on the feature of srm, switched reluctance motor have structure simple, firm and control
System is convenient, and has wider rotating speed and power regulating range, is widely used in drawing transport, universal industrial, aviation, household electric
The every field such as device, it has also become one of contemporary Electrified Transmission hot research topic.The flux linkage characteristic of switched reluctance machines is motor
Optimization design, model are set up and are run the prerequisite controlling, but the height saturability of its special double-salient-pole structure and magnetic circuit,
Make Distribution of Magnetic Field complicated, there is situations such as significant edge effect, eddy current effect and serious local saturation.It can not possibly picture
Traditional AC and DC motor is equally with a two dimensionψ-iMagnetic linkage curve just can describe motor characteristic, and it needs one group different turns
Three-dimensional under sub- positionψ-i-θMagnetic linkage family of curves could describe its characteristic, and the accuracy that motor performance calculates depends on
The accuracy of three-dimensional magnetic linkage family of curves.Existing more feasible magnetic linkage curve acquisition method has experimental tests and finite element analyses
Method.
Experimental tests typically pass through to design test circuit, test out the voltage in machine winding, current information carries out magnetic
Chain calculates indirectly.Experimental tests are simple, convenient test, result accurately, but need locked rotor position, and test process is numerous
Trivial time-consuming, situations such as not being suitable for magnetic linkage on-line testing, on-the-spot test and mass production of products and test.
Limited element analysis technique is using finite element analysis software, motor-field to be carried out with static analysis to calculate to ask for difference
Magnetic linkage curve under rotor-position.Two-dimensional FE analysis method comparative maturity, is widely used, but because ignoring the magnetic field effect of end,
Cause specific location error larger.Although three-dimensional finite element method considers the various factors of motor comprehensively, improve accuracy,
But calculate excessively time-consuming loaded down with trivial details and very high to computer hardware environmental requirement, be not widely used.
The test equipment test using at present is loaded down with trivial details, test result is inaccurate, is not suitable for magnetic linkage on-line testing, scene is surveyed
Situations such as examination and mass production of products are tested.
Content of the invention:
It is an object of the invention to provide a kind of switched reluctance motor flux linkage curve test method based on magnetic coenergy correction and
Device.
Above-mentioned purpose is realized by following technical scheme:
A kind of switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, its composition includes: direct current is adjustable
Regulated power supply, described direct current adjustable stabilized voltage supply is connected with switch reluctance machine drive, and described switched reluctance machines drive
Dynamic device is connected with three-phase switch reluctance machine, can analyser respectively, and described can analyser is connected with pc machine.
The described switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, described switched reluctance machines
Driver includes housing, and described enclosure interior is provided with dsp controller, described dsp controller and igbt drive circuit,
Analog-digital converter connects, and described igbt drive circuit is connected with winding, described winding respectively with voltage sensor, electric current
Sensor connects, and described voltage sensor, described current sensor are connected with described analog-digital converter respectively, described
There is in dsp controller can interface, described can interface is connected with described can analyser.
The described switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, described dsp controller
Model tms320f2812, the model lt 58-s7/sp of described current sensor, the model of described voltage sensor
For clsm-10ma, described analog-digital converter is using 12 high-speed synchronous data acquiring chip ad7864.
The described switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, described threephase switch magnetic resistance
Motor is three-phase 12/8 switched reluctance machines.
A kind of method of testing using the above-mentioned switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction,
The method comprises the steps:
(1) two-dimensional finite element method is used to obtain switched reluctance motor flux linkage calculated curve by pc machine；(2) determine, turn in motor
At sub- salient pole centrage alignment, without locked rotor position, alignment phase θ is measured by single-phase excitation1Position magnetic linkage curve, then lead to
Cross two-phase excitation and introduce mutual inductance m and accurately obtain adjacent phase θ2Position magnetic linkage curve；(3) according to two magnetic linkage songs of actual measurement
Line, calculates magnetic linkage correction factor according to magnetic coenergy correction principle by pc machine, and two dimensional finite element calculated curve is modified,
Thus obtaining accurately three-dimensionalψ-i-θMagnetic linkage family of curves；
Wherein: θ1For the angle of alignment phase stator salient poles centrage and adjacent rotor groove center line, θ2For the adjacent phase of homonymy
Stator salient poles centrage and the angle of this rotor groove center line.
The method of testing of the described switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, described presses
Take magnetic coenergy correction principle to calculate magnetic linkage correction factor is by picture θ of aliging1With adjacent phase θ2The magnetic coenergy that position is surveyedw ctθ
Magnetic coenergy with FEM calculation gainedw cfθ , alignment phase θ is obtained respectively according to formula 11With adjacent phase θ2Magnetic at position
Altogether can correction factork θ1 、k θ2 , wherein, formula 1 isk θ =w ctθ /w cfθ ；
According to requiredk θ1 、k θ2 , the magnetic linkage correction system based on magnetic coenergy under Difference angles is obtained by formula 2
Number, wherein, formula 2 isk θ = k θ1 +k(θ 1 -θ ),
And coefficient k isk=( k θ2 -k θ1 )/(θ 1 - θ 2 ).
The described switched reluctance motor flux linkage curve test method based on magnetic coenergy correction, described passes through biphase encouraging again
Magnetic simultaneously introduces mutual inductance m and accurately obtains adjacent phase θ2Position magnetic linkage curve, described introducing mutual inductance m carrys out quantitative description
The difference of magnetic linkage under biphase motivation model and single-phase motivation model, thus accurately obtain adjacent phase θ2Position magnetic linkage curve；If
The biphase magnetic linkage measured that is simultaneously energized isψ θ2 , then press formulaψ ′ θ2 =ψ θ2 +miMagnetic linkage value is corrected.
Beneficial effect:
1. the direct current adjustable stabilized voltage supply of the present invention provides test voltage, in order to meet the requirement of motor peak point current, choosing
With German ea power supply ps9300-75.Asymmetry half-bridge circuit is made up of igbt and fast recovery diode, is led to by the i/o mouth of dsp
Cross igbt drive circuit to drive to winding applied voltage.Current sensor (lt58-s7/sp) and voltage sensor (clsm-
10ma) it is used for detection winding electric current and winding voltage.12 high-speed synchronous data acquiring chips selected by analog-digital converter
ad7864.The voltage of ad7864 collection, current data are read in dsp, give pc machine by can interface and can analyser
Complete the srm three-dimensional magnetic linkage family of curves based on magnetic coenergy correction principle to calculate.Because this device is without locked rotor position, greatly
Simplify greatly test device.
The inventive method directly measures two magnetic linkage curves without lock out motor rotor-position, by magnetic coenergy correction principle
Revise FEM calculation curve, accurately obtain switched reluctance motor flux linkage family of curves；Not only can be in motor stator and rotor salient pole
Heart line aligned position, without locked rotor position, quick acquisition alignment phase θ1With adjacent phase θ2Position magnetic linkage curve, and with
Two-dimensional finite element method combines, and by the compensation to end magnetic field effect, can obtain accurate srm flux linkage characteristic, for switch
The optimization design of reluctance motor, model are set up and controlled to run provides foundation.
The same model switched reluctance machines that the inventive method has determined for performance, structural parameters and production technology,
The difference of flux linkage characteristic is mainly caused by magnetic material, manufacturing and positioning errors, can carry out scene by the inventive method
Test and correction.
Switched reluctance machines used in the inventive method commercial production, after long-play, due to abrasion, aging
Etc. reason, flux linkage characteristic also can change, and can also carry out on-line testing and correction using the inventive method.
The inventive method is applied to magnetic linkage on-line testing, on-the-spot test and mass production of products situations such as test.
Brief description:
Accompanying drawing 1 is the structural representation of the present invention.
Accompanying drawing 2 is the circuit theory diagrams of the present invention.
Accompanying drawing 3 is prototype structure and the rotor position angle schematic diagram of the present invention.
Accompanying drawing 4 is the uniformly natural subdivision graph of the present invention.
Accompanying drawing 5 is the partial enlargement subdivision graph of the present invention.
Accompanying drawing 6 is 0 degree of stator poles and the rotor slot aligned position distribution diagram of magnetic line of force of the present invention.
Accompanying drawing 7 is 22.5 degree of stator poles and the rotor pole aligned position distribution diagram of magnetic line of force of the present invention.
Accompanying drawing 8 is 7.5 degree of stator poles and the rotor pole non-overlapping position distribution diagram of magnetic line of force of the present invention.
Accompanying drawing 9 is 15 degree of stator poles and the rotor slot aligned position distribution diagram of magnetic line of force of the present invention.
Accompanying drawing 10 is 22.5 degree of stator poles and the rotor pole aligned position magnetic flux distribution figure of the present invention.
Accompanying drawing 11 is 7.5 degree of stator poles and the rotor slot aligned position magnetic flux distribution figure of the present invention.
Accompanying drawing 12 is 0 degree of stator poles and the rotor pole aligned position magnetic flux distribution figure of the present invention.
Accompanying drawing 13 is 15 degree of stator poles and the rotor slot aligned position magnetic flux distribution figure of the present invention.
Accompanying drawing 14 is the magnetic linkage-electric current-angle 2d calculated curve figure of the present invention.
Accompanying drawing 15 is the magnetic linkage-electric current-angle 3d calculated curve figure of the present invention.
Accompanying drawing 16 be θ=7.5 of the present invention magnetic linkage curve arithmetic mean of instantaneous value process after test result figure.
Accompanying drawing 17 is the present invention based on the revised three-dimensional of magnetic coenergyψ-i-θMagnetic linkage family of curves schemes.
Accompanying drawing 18 be the present invention magnetic coenergy correction after magnetic linkage curve with revise before comparison diagram.
Specific embodiment:
Embodiment 1:
A kind of switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, its composition includes: direct current is adjustable
Regulated power supply 1, described direct current adjustable stabilized voltage supply is connected with switch reluctance machine drive 2, described switched reluctance machines
Driver is connected with three-phase switch reluctance machine 3, can analyser 4 respectively, and described can analyser is connected with pc machine 5,
Described pc machine completes the three-dimensional based on magnetic coenergy correction principle for the switched reluctance machinesψ-i-θMagnetic linkage family of curves calculates.
Embodiment 2:
The switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction according to embodiment 1, described
Switch reluctance machine drive includes housing, and described enclosure interior is provided with dsp controller 6, described dsp controller with
Igbt drive circuit 7, analog-digital converter 8 connect, and described igbt drive circuit is connected with winding 9, and described winding is respectively
Be connected with voltage sensor 11, current sensor 10, described voltage sensor, described current sensor respectively with described
Analog-digital converter connect, there is can interface 12, described can interface and described can in described dsp controller
Analyser connects.
Embodiment 3:
The switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction according to embodiment 1 or 2, institute
Model tms320f2812 of the dsp controller stated, the model lt 58-s7/sp of described current sensor, described
Model clsm-10ma of voltage sensor, described analog-digital converter adopts 12 high-speed synchronous data acquiring chips
ad7864.
Embodiment 4:
The switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction according to embodiment 1, described
Three-phase switch reluctance machine is three-phase 12/8 switched reluctance machines.
Embodiment 5:
A kind of switched reluctance motor flux linkage curve based on magnetic coenergy correction described in one of utilization above-described embodiment 1-4
The method of testing of test device, the method comprises the steps:
(1) two-dimensional finite element method is used to obtain switched reluctance motor flux linkage calculated curve by pc machine；(2) determine, turn in motor
At sub- salient pole centrage alignment, without locked rotor position, alignment phase θ is measured by single-phase excitation1Position magnetic linkage curve, then lead to
Cross two-phase excitation and introduce mutual inductance m and accurately obtain adjacent phase θ2Position magnetic linkage curve；(3) according to two magnetic linkage songs of actual measurement
Line, calculates magnetic linkage correction factor according to magnetic coenergy correction principle by pc machine, and two dimensional finite element calculated curve is modified,
Thus obtaining accurately three-dimensionalψ-i-θMagnetic linkage family of curves；
Wherein: θ1For the angle of alignment phase stator salient poles centrage and adjacent rotor groove center line, θ2For the adjacent phase of homonymy
Stator salient poles centrage and the angle of this rotor groove center line.
Embodiment 6:
The test of the switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction according to embodiment 5
Method, described is by phase θ of aliging according to magnetic coenergy correction principle calculating magnetic linkage correction factor1With adjacent phase θ2Position is surveyed
Magnetic coenergyw ctθ Magnetic coenergy with FEM calculation gainedw cfθ , alignment phase θ is obtained respectively according to formula 11With adjacent
Phase θ2Magnetic coenergy correction factor at positionk θ1 、k θ2 , wherein, formula 1 isk θ =w ctθ /w cfθ ；
According to requiredk θ1 、k θ2 , the magnetic linkage correction system based on magnetic coenergy under Difference angles is obtained by formula 2
Number, wherein, formula 2 isk θ = k θ1 +k(θ 1 -θ ),
And coefficient k isk=( k θ2 -k θ1 )/(θ 1 - θ 2 ).
Embodiment 7:
The switched reluctance motor flux linkage curve test method based on magnetic coenergy correction according to embodiment 5 or 6, institute
State by two-phase excitation and introduce mutual inductance m and accurately obtain adjacent phase θ2Position magnetic linkage curve, described introducing mutual inductance system
Number m carrys out the difference of the biphase motivation model of quantitative description and magnetic linkage under single-phase motivation model, thus accurately obtaining adjacent phase θ2Position
Magnetic linkage curve；If the biphase magnetic linkage measured that is energized is simultaneouslyψ θ2 , then press formulaψ ′ θ2 =ψ θ2 +miMagnetic linkage value is carried out
Correction.
Embodiment 8:
The described switched reluctance motor flux linkage curve test method based on magnetic coenergy correction, by two-dimensional finite element method and reality
Test method of testing to combine, and introduce mutual inductance correction and magnetic coenergy correction, thus obtaining accurately three-dimensionalψ-i-θMagnetic linkage is bent
Line race.
Two-dimensional static electromagnetic property finite element analyses
By the present invention in that with ansoft maxwell2d finite element analysis software the Distribution of Magnetic Field to switched reluctance machines
It is analyzed, to obtain flux linkage calculation curve.
According to srm practical situation, select suitable mesh generation, while to guarantee counting accuracy, reduce meter as far as possible
Evaluation time.As shown in Fig. 4, Fig. 5, in this model, at air gap, subdivision is closeer, and in other places, subdivision is relatively sparse, this
Sample ensure that computational accuracy, also reduces the calculating time simultaneously.Thus obtain flux linkage calculation curve as shown in Figure 14.
The quick test of flux linkage characteristic of no motor rotor position locking and correction for three-phase switch reluctance machine, due to
The symmetry of srm structure, when one is mutually in motor stator and rotor salient pole centrage aligned position, in addition biphase with aligned position
Centered on line symmetrical in both sides.Because the level of torque equal direction at distance center line same position is contrary, if given
Adjacent biphase be energized simultaneously, the total torque of motor is 0, and motor will not rotate.Therefore, in this position measurement magnetic linkage, rotor is not
Need locking can measure adjacent phase θ2Position magnetic linkage curve.In order to reduce error further, introduce mutual inductance correction coefficient m and come
The difference of magnetic linkage under the biphase motivation model of quantitative description and single-phase motivation model, if the biphase magnetic linkage measured that is energized is simultaneouslyψ θ2 , then press formulaψ ′ θ2 =ψ θ2 +miMagnetic linkage value is corrected.
During actual test, rotor rotation phenomenon occurs during biphase energising test, can go out in both sides rotor-position
Existing ±δθDeviation, thus brings test error.According to the symmetry of srm, can be by arithmetic average be asked to biphase actual measurement magnetic linkage value
The method of value is eliminating error.
Mutually be energized torque for 0 to alignment in aligned position, motor will not rotate, it is therefore not necessary to want locked rotor straight
Connect and measure alignment phase θ1Position magnetic linkage curve.
Based on the magnetic linkage curve amendment switched reluctance machines electromagnetic torque of magnetic coenergy press magnetic coenergy calculate more convenient, in view of
Electromagnetic torque and the relation of magnetic coenergy, the present invention proposes indirectly to calculate magnetic linkage correction factor by magnetic coenergy.Due to switching magnetic
Resistance electric machine rotor all no permanent magnets, after magnetic linkage curve determines, magnetic coenergy is calculated as follows:
Assume θ1The magnetic coenergy that at position, FEM calculation obtains isw cfθ1 , the magnetic coenergy that experiment test obtains isw ctθ1 , then aligned position magnetic coenergy correction factor can be obtained according to formula 1k θ1 , formula 1 is:
k θ =w ctθ /w cfθ (1)
Correspondingly, can calculate in θ2Magnetic coenergy correction factor at positionk θ2 , and each position is calculated according to formula 2
Place's magnetic linkage correction factork θ , formula 2 is:
k θ = k θ1 +k(θ 1 -θ )(2)
Wherein, coefficientk=( k θ2 -k θ1 )/(θ 1 - θ 2 ).
Each position flux linkage calculation curve that FInite Element is obtained is multiplied by corresponding coefficientk θ , just obtain revised
Magnetic linkage family of curves.
Embodiment 9:
The described switched reluctance motor flux linkage curve test method based on magnetic coenergy correction, is this as shown in Figure 18
Bright is the flux linkage characteristic curve based on magnetic coenergy correction for 12/8 switched reluctance machines.Mainly pass through srm two-dimensional static electricity
Magnetic characteristic FEM calculation, the quick measurement of flux linkage characteristic of no motor rotor position locking and magnetic coenergy coefficient correction are completing
's.
First, srm two-dimensional static electromagnetic property FEM calculation
1st, the hypothesis that two dimensional finite element proposes
(1) adopt virtual two-dimensional field stimulation actual electromagnetic field；Choose rectangular coordinate system and the International System of Units.
Approximate processing is made to the subtlety of stator rabbet, stator sector piece fillet and pole lamination part fillet, chamfering.
Ignore end effect, magnetic field is uniformly distributed vertically, i.e. current density vectorsjWith magnetic potential vectoraOnly axial
Componentj=j z , a=a z .
Outside motor magnetic field proportion very little, can approximately ignore.Rotor inner surface circumference and stator outer surface circumference
For zero vector plane.
, the two-dimentional static magnetic analysis of switched reluctance machines
Herein 12/8 switched reluctance machines are carried out with two-dimentional static magnetic analysis, the relevant parameter of model machine, as shown in table 1, is tied
Structure is as shown in Fig. 3.
Table 1 srm model machine parameter
| Parameter | Numerical value | Parameter | Numerical value |
| Rated power (watt) | 3000 | Rated voltage (lies prostrate) | 514 |
| Rated speed (rev/min) | 3000 | The number of phases | 3 |
| Stator poles | 12 | Rotor number of poles | 8 |
| Stator outer diameter (rice) | 0.12 | Diameter of stator bore (rice) | 0.072 |
| Rotor diameter (rice) | 0.0723 | Rotor internal diameter (rice) | 0.03 |
| Stator polar arc (is spent) | 15 | Rotor pole arc (is spent) | 16.95 |
| Stator yoke thickness (rice) | 0.01 | Rotor yoke thickness (rice) | 0.01 |
| Core length (rice) | 0.08 | Air gap (rice) | 0.0003 |
| Rotor flute profile: | Parallel teeth | Winding resistance (Europe) | 2.47 |
Magnetic potential is solved according to formula 3a, whereina z For vector magnetic potential in the axial value of z,j z Electric current density is in z axle side
To value.
(3).
The magnetic induction of magnetostatic field and the physical quantity of magnetic field intensity are tried to achieve according to formula 4, formula 5.
b=▽╳a(4).
(5).
Magnetic linkage is calculated according to the magnetostatic field theory of Maxwell,bIt is magnetic flux density,sIt is area.
(6).
According to srm practical situation, while ensureing counting accuracy, reduce the calculating time as far as possible.It is suitable to select
Mesh generation size.As shown in Fig. 4, Fig. 5, this model subdivision at air gap is closeer, and in other places, subdivision is relatively dilute
Dredge, so ensure that computational accuracy, also reduce the calculating time simultaneously.
, switched reluctance machines the magnetostatic field computation of two dimension so that motor is in the case of nominal operation as a example, to srm mono- around
Distribution diagram of magnetic line of force such as Fig. 6, Fig. 7, Fig. 8, Fig. 9 institute of two-dimensional magnetic field under different angles when group passes to 9a rated current, can be obtained
Show.Under its different angle, the magnetic flux distribution figure of two-dimensional magnetic field is as shown in Figure 10, Figure 11, Figure 12, Figure 13.
Respectively interpolation calculation, magnetic linkage 2d calculated curve such as Figure 14 institute are carried out to the magnetic linkage under different electric currents, different angle
Show, magnetic linkage 3d calculated curve is as shown in Figure 15.
2nd, the quick test of the flux linkage characteristic of no motor rotor position locking, with correction for three-phase 12/8 pole motor, defines
Stator salient poles and rotor groove center line aligned position are 0, then its phase θ of aliging1=22.5, adjacent phase θ2=7.5, as Fig. 3 institute
Show.When being in aligned position, in addition biphase centered on aligned position line symmetrical in both sides, space bit angle setting is
7.5º.Because the level of torque equal direction of distance center line same position is contrary, if be 7.5 to space bit angle setting two
It is energized when identical, the total torque of motor is 0, and motor will not rotate.It is therefore not necessary to lock out motor rotor-position, you can measure θ=
7.5 magnetic linkage curve.Equally, there is 0 torque area in aligned position, give alignment phase electricity consumption in this position, motor will not rotate,
It is therefore not necessary to want locked rotor also can measure θ=22.5 magnetic linkage curve.
Know, θ=7.5 and θ=22.5 two magnetic linkage curve can not need locked rotor position straight by above analysis
Connect test, specific test mode has two kinds, one is to be energized test in aligned position three-phase simultaneously；Two is in aligned position
First biphase energising test θ=7.5 magnetic linkage curve, further communicates electrical testing θ=22.5 magnetic linkage curve.Why first give biphase
Energising is to ensure that rotor pole centrage can align with stator poles centrage, there is 0 torque area near aligned position, one
Mutually energising is it cannot be guaranteed that rotor pole centrage aligns.But three-phase excitation simultaneously can cause the serious saturation of aligned position magnetic circuit,
Potential drop is significantly increased, and has considerable influence (every phase magnetic flux reduces, and phase magnetic linkage also reduces) to phase magnetic linkage.Biphase encourage simultaneously
When, rotor yoke portion magnetic flux increases, and so that saturation of magnetic path is increased, but attached with stator slot axis aligned position in rotor tooth
Closely, magnetic circuit reluctance ratio is larger, and at this position, the impact to phase magnetic linkage is less.In order to reduce error further, introduce mutual inductance correction
Coefficient m carrys out quantitative description biphase motivation model magnetic linkageψ 7.5 With magnetic linkage under single-phase motivation modelψ ′ 7.5 Difference, survey through multiple
Examination takes m=1.8868e-4, pressψ ′ 7.5 =ψ 7.5 +miMagnetic linkage value is corrected.
According to formula (7) discretization srm magnetic linkage expression formula, only srm need to can be obtained by voltage, the measurement of electric current
Magnetic linkage.
(7).
In formula, δtFor sampling time interval, n is measurement point number.
During actual test, if srm not bringing onto load, rotor resistance is less, occurs during biphase energising test
Rotor rotation phenomenon, the rotor-position deviation thus occurring will bring error to test.It will be noted that energising biphase with right
Centered on neat position, line is symmetrical in both sides, and when the deviation that+δ θ angle mutually, another-δ θ angle mutually necessarily
The deviation of degree, according to the symmetry of srm, can be by asking the method for arithmetic mean of instantaneous value to eliminate by mistake biphase actual measurement magnetic linkage value
Difference.As shown in Figure 16, in figure gives test result (θ=7.5 magnetic linkage curve) after arithmetic mean of instantaneous value is processed simultaneously
Experimental results using position local device.It can be seen that the test result of the present invention and laboratory method test knot
Really basically identical.
3rd, the magnetic linkage curve amendment based on magnetic coenergy
At alignment phase θ=22.5, the magnetic coenergy that obtains of FEM calculation isw cf22.5 , the magnetic coenergy that experiment test obtains isw ct22.5 , aligned position magnetic coenergy correction factor is calculated according to formula 1k 22.5 =w ct22.5 /w cf22.5 .Correspondingly, can calculate
Magnetic coenergy correction factor at adjacent phase θ=7.5k 7.5 =w ct7.5 /w cf7.5 , and calculate the magnetic linkage of each position according to formula 2 and repair
Positive coefficientk θ .
According to experimental result, calculatek 22.5 =1.0224,k 7.5 =1.0919,k =0.00463 is thus corrected
As shown in Figure 17, in figure gives the experimental results using position local device simultaneously for magnetic linkage family of curves afterwards.From figure
17 as can be seen that method of testing proposed by the present invention is basically identical with the test result of laboratory method.
For further illustrating the effect that the present invention tests to magnetic linkage, giving θ is magnetic after magnetic coenergy correction when 0,22.5
Comparison before chain curve and correction, as shown in Figure 18.
Claims (3)
1. a kind of method of testing of the switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction, is characterized in that: should
Method comprises the steps:
(1) two-dimensional finite element method is used to obtain switched reluctance motor flux linkage calculated curve by pc machine；
(2) at motor stator and rotor salient pole centrage alignment, without locked rotor position, alignment phase θ is measured by single-phase excitation1
Position magnetic linkage curve, then by two-phase excitation and introduce mutual inductance m and accurately obtain adjacent phase θ2Position magnetic linkage curve；
(3) according to two magnetic linkage curves of actual measurement, according to magnetic coenergy correction principle, magnetic linkage correction factor is calculated by pc machine, and to making
Obtain switched reluctance motor flux linkage calculated curve with two-dimensional finite element method to be modified, thus obtaining accurately three-dimensional ψ-i- θ magnetic
Chain family of curves；
Wherein: θ1For the angle of alignment phase stator salient poles centrage and adjacent rotor groove center line, θ2For homonymy adjacent phase stator
Salient pole centrage and the angle of this rotor groove center line；
The switched reluctance motor flux linkage curve testing device based on magnetic coenergy correction that the method is used, its composition includes: straight
Stream adjustable stabilized voltage supply, is characterized in that: described direct current adjustable stabilized voltage supply is connected with switch reluctance machine drive, described
Switch reluctance machine drive is connected with three-phase switch reluctance machine, can analyser respectively, described can analyser and pc
Machine connects；Described switch reluctance machine drive includes housing, and described enclosure interior is provided with dsp controller, described
Dsp controller is connected with igbt drive circuit, analog-digital converter, and described igbt drive circuit is connected with winding, described
Winding is connected with voltage sensor, current sensor respectively, described voltage sensor, described current sensor respectively with institute
The analog-digital converter stated connects, and has can interface, described can interface and described can in described dsp controller
Analyser connects；Model tms320f2812 of described dsp controller, the model lt 58- of described current sensor
S7/sp, model clsm-10ma of described voltage sensor, described analog-digital converter adopts 12 high-speed synchronous datas
Acquisition chip ad7864；Described three-phase switch reluctance machine is three-phase 12/8 switched reluctance machines.
2. method of testing according to claim 1, is characterized in that: described repaiies according to magnetic coenergy correction principle calculating magnetic linkage
Positive coefficient is by phase θ of aliging1With adjacent phase θ2The magnetic coenergy that position is surveyedw ctθ Magnetic coenergy with FEM calculation gainedw cfθ , alignment phase θ is obtained respectively according to formula 11With adjacent phase θ2Magnetic coenergy correction factor at positionk θ1 、k θ2 , its
In, formula 1 isk θ =w ctθ /w cfθ ；
According to requiredk θ1 、k θ2 , the magnetic linkage correction factor based on magnetic coenergy under Difference angles is obtained by formula 2,
Wherein, formula 2 isk θ = k θ1 +k(θ 1 -θ ),
And coefficient k isk=( k θ2 -k θ1 )/(θ 1 - θ 2 ).
3. the method for testing according to claim 1 or 2, is characterized in that: described passes through two-phase excitation again and introduce mutually
Sense Coefficient m accurately obtains adjacent phase θ2Position magnetic linkage curve, described introducing mutual inductance m carrys out the biphase excited modes of quantitative description
The difference of magnetic linkage under formula and single-phase motivation model, thus accurately obtain adjacent phase θ2Position magnetic linkage curve；If biphase lead to simultaneously
The magnetic linkage that electrical measurement goes out isψ θ2 , then press formulaψ ′ θ2 =ψ θ2 +miMagnetic linkage value is corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410087774.2A CN103869245B (en) | 2014-01-20 | 2014-03-11 | Magnetic co-energy correction-based switched reluctance motor (SRM) flux linkage curve test method |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410024781 | 2014-01-20 | ||
| CN2014100247818 | 2014-01-20 | ||
| CN201410024781.8 | 2014-01-20 | ||
| CN201410087774.2A CN103869245B (en) | 2014-01-20 | 2014-03-11 | Magnetic co-energy correction-based switched reluctance motor (SRM) flux linkage curve test method |
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| CN104330755B (en) * | 2014-08-26 | 2017-03-29 | 南通大学 | A kind of switched reluctance motor flux linkage characteristic On-line Measuring Method |
| CN104316876B (en) * | 2014-10-08 | 2017-03-22 | 西北工业大学 | Method for rapidly obtaining three-phase 12/8 pole SRM magnetic linkage characteristics with consideration on mutual inductance coupling |
| CN106992732B (en) * | 2016-01-20 | 2019-06-11 | 同济大学 | A kind of motor magnetic coenergy model foundation system |
| CN112068053B (en) * | 2020-09-18 | 2021-09-24 | 福州大学 | Method for indirectly measuring magnetic linkage and attractive force characteristics of electromagnetic switch operating mechanism |
| CN116795168B (en) * | 2023-08-21 | 2023-10-31 | 希望森兰科技股份有限公司 | Virtual flux linkage-based frequency converter aging power factor control method |
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| CN101526823A (en) * | 2009-04-20 | 2009-09-09 | 哈尔滨工业大学 | Control method of constant torque of switched reluctance motor |
| CN101769998A (en) * | 2010-01-18 | 2010-07-07 | 南通大学 | Switched reluctance motor flux linkage characteristic measurement method |
| CN201935998U (en) * | 2010-12-24 | 2011-08-17 | 青岛科技大学 | Flux linkage characteristic measuring system of switched reluctance motor |
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| GB0007422D0 (en) * | 2000-03-27 | 2000-05-17 | Switched Reluctance Drives Ltd | Position detection of switched reluctance machines |
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| CN101526823A (en) * | 2009-04-20 | 2009-09-09 | 哈尔滨工业大学 | Control method of constant torque of switched reluctance motor |
| CN101769998A (en) * | 2010-01-18 | 2010-07-07 | 南通大学 | Switched reluctance motor flux linkage characteristic measurement method |
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