CN107425783A - A kind of method that can reduce switched reluctance machines torque pulsation - Google Patents

A kind of method that can reduce switched reluctance machines torque pulsation Download PDF

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Publication number
CN107425783A
CN107425783A CN201710674173.5A CN201710674173A CN107425783A CN 107425783 A CN107425783 A CN 107425783A CN 201710674173 A CN201710674173 A CN 201710674173A CN 107425783 A CN107425783 A CN 107425783A
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torque
phase
phases
reality output
state
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印光宇
吴胜章
吴思中
姚小华
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JIANGSU SHANGQI GROUP CO Ltd
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JIANGSU SHANGQI GROUP CO Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/30—Direct torque control [DTC] or field acceleration method [FAM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/04—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for damping motor oscillations, e.g. for reducing hunting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/098—Arrangements for reducing torque ripple
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
    • H02P2205/05—Torque loop, i.e. comparison of the motor torque with a torque reference

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The invention discloses a kind of method that can reduce switched reluctance machines torque pulsation, including step to be：Phase winding working condition is set, parameter is pre-set, it is expected phase torque distribution, reality output torque acquisition, phase torque deviation calculate in real time, single-phase turns on area's Hysteresis control and commutation overlap area Hysteresis control.The present invention is incorporated into torque partition function TSF in direct instantaneous torque DITC controls, it is proposed that the direct Instantaneous torque control method based on torque partition function.By selecting rationally switch angle and optimization switching sequence to control electric current, and then reduce torque pulsation.

Description

A kind of method that can reduce switched reluctance machines torque pulsation
Technical field
The present invention relates to a kind of verifying attachment, particularly a kind of method that can reduce switched reluctance machines torque pulsation.
Background technology
Electric valve executing mechanism is for some other executing agency, and it has response fast, and speed governing is good, work peace Entirely, efficiency high and can remote control the advantages that.Thus, in some are such as the high complex working condition situation of processing safety requirement, electricity The valve of dynamic executing agency has obtained extensive utilization.
Electric valve executing mechanism has not merely pursued the accuracy of control valve position at present, it is also necessary to including motor The performance such as faults-tolerant control and protection, remote monitoring, man-machine communication.It is stronger that intelligent control technology application has electric operator Big performance.As the most important part of electric operator, selecting the motor of what type will directly affect motor The performance and application occasion of electric operator.
SRM has mechanical strength is good, safe for operation and efficiency is high etc. compared to direct current generator and the major class of alternating current generator two Outstanding feature.Switched Reluctance Motor is the governing system of new generation that grows up after DC speed regulation, AC speed regulating, together When the advantages of having two big governing systems concurrently, specific manifestation is as follows：
1. starting current is small but torque is big：When SRM reaches nominal torque, as long as the rated current of its starting current 15%； As long as when SRM detent torques reach 2 times of nominal torque also 30% rated current.This premium properties make it that SRM is especially suitable Closing needs the place with startup is carried, and because valve is when opening, its load is often bigger, so SRM is particularly suitable as electricity The actuating motor of dynamic executing agency.
2. fault freedom is good.One side SRM torque is unrelated with the direction of winding current, so the stream without worrying electric current To the size for influenceing torque；Secondly SRM power topological circuit is separate, and each phase current can be with independent control, phase and phase Influence between winding is smaller；Worry the straight-through influence of electric current, further can because the special topological structures of SRM completely dispense with Ignore influence of the switching dead to PWM.
3. mechanical structure is simple, cost is low, loss is low, temperature rise is slow.SRM rotors do not have centralized winding not have permanent magnetism yet Body, simply by silicon steel sheet group into.This aspect has saved material cost, enables rotor to bear higher temperatures liter again, will not be because of The rising of temperature and permanent magnet is failed.On the other hand by silicon steel sheet group into rotor mechanical structure is simple, intensity is big, Ke Yi Worked under higher rotation speed.
However, switched reluctance machines are in use, there is also following deficiency：
1. due to the intrinsic double-salient-pole structure of switched reluctance machines, and operationally, caused electromagnetic torque is on rotor It is formed by stacking by pulse torque so that synthesis torque is not a constant value, and a large amount of harmonic components be present, so It will cause electromagnetic torque that there is output pulsation.
2. the relation between angle of rotor of motor, phase current and magnetic linkage three is nonlinear, along with existing in circuit The switching action of winding self-induction and mutual inductance and primary power switch device is not what moment completed, so even with square wave Power supply can not also realize rapid switching of the phase current between rated value and zero, therefore instantaneous torque will produce corresponding ripple It is dynamic.
Present in this phenomenon is conducted in work and commutation process and had one.The caused torque arteries and veins during single-phase It is dynamic be due to winding excitation it is improper caused by.And this problem just seems especially prominent during commutation.In this process, it is preceding One phase winding is turned off, and phase current is begun to decline, and instantaneous torque caused by the phase reduces therewith.Now, due to next phase current also Do not set up or also in establishment stage, it is impossible to sufficiently large electromagnetic torque is produced, so total electromagnetism now can not be kept to turn Moment preserving.
3. although the number of phases of increase switched reluctance machines can reduce torque pulsation, it will certainly so increase motor knot The complexity of structure and the cost of peripheral drive circuit.
The content of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of can reduce switch The method of reluctance motor torque pulsation.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of method that can reduce switched reluctance machines torque pulsation, comprises the following steps：
Step 1, phase winding working condition is set：Per two main switching devices Q1, Q2 in the equal correspondent transform device of phase winding With two diodes D1, D2；Main switching device Q1, corresponding phase winding and main switching device Q2 are in series successively；Diode D1 is anti- It is connected in parallel on the outside of main switching device Q1 and corresponding phase winding, diode D2 inverse parallels are outside main switching device Q2 and corresponding phase winding Side；Working condition per phase winding is respectively provided with tri- kinds of states of S=1, S=0 and S=-1, and the method to set up of three kinds of states is as follows：
State S=1 method to set up is：Main switching device Q1, Q2 are simultaneously open-minded, and busbar voltage supplies to corresponding phase winding Electricity, now, the both end voltage of the phase winding is+U.
State S=0 method to set up is：Main switching device Q1 is individually open-minded, main switching device Q2 shut-offs, machine winding electricity Stream carries out afterflow by diode D1, and now, the both end voltage of the phase winding is 0.
State S=-1 method to set up is：Main switching device Q1, Q2 are simultaneously turned off, and corresponding phase winding electric current passes through two poles Pipe D1, D2 carry out afterflow, and now, the both end voltage of the phase winding is-U.
Step 2, parameter is pre-set：Pre-set and it is expected torque T*, deviation delta T inside stagnant ringminAnd in every phase winding Current minimum.
Step 3, it is expected that phase torque distributes：The expectation torque T for being pre-set step 2 using torque partition function TSF*Point Dispensing is per phase winding.
Step 4, reality output torque obtains：By the way that switched reluctance machines are carried out with direct measurement or the method for calculating, obtain Take the reality output torque T of switched reluctance machines.
The computational methods of reality output torque：Closed by test prototype to obtain the numerical value between torque-current-angle System, the electric current of real electrical machinery winding and current rotor-position are measured, current actual torque is obtained by tabling look-up.
Step 5, phase torque deviation Δ T is calculated in real time：Using torque controller, the automatic phase that calculates in real time turns as follows Square deviation delta T.
Δ T=T*-T
Step 6, single-phase conducting area's Hysteresis control：In single-phase conducting area, from the criterion of direct instantaneous torque, phase winding Working condition only there is S=1 and two kinds of S=0；Realize two kinds of works of S=1 and S=0 in accordance with the following steps using hystersis controller Make the automatic switchover of state.
Step 61, working condition S=1：When reality output torque T reduces, and the phase torque deviation Δ that step 5 calculates in real time T is more than deviation delta T inside the default stagnant ring of step 2minWhen, single-phase conducting area is in S=1 working condition；Now, this mutually around The both end voltage of group is+U, and reality output torque T will increase.
Step 62, working condition S=0：When reality output torque T increases, and the phase torque deviation Δ that step 5 calculates in real time T is less than deviation-Δ T inside the default stagnant ring of step 2minWhen；The working condition that conducting area automatically switches to S=0 is oriented to, now, Reality output torque T will reduce.
Step 63, repeat step 61 and step 62, make it is expected phase torque T in reality output torque T tracking*。
Step 7, commutation overlap area Hysteresis control：Assuming that two phase windings for being related to commutation are respectively B phases and C phases, in commutation Overlay region, realize automatic switchover of the B phases working condition to C phase working conditions in accordance with the following steps using hystersis controller.
Step 71, the commutation original state of B phases and C phases：When commutation just starts, the electric current energy rapid decrease of B phases it is expected, with Prevent electric current from flowing into inductance and declining area, B phases have tri- kinds of states of S=1, S=0 and S=-1；It is expected that C phase currents can rise rapidly, To produce enough torques, C phases have S=0 and S=1 two states.
Step 72, as reality output torque TIt is realLess than expectation phase torque TPhaseWhen, using following state switching method, make reality Phase torque T it is expected in output torque T tracking*。
Step 721, holding B phase states are constant, and C phase states are changed into S=1 from S=0.
Step 722, if C phase states have been S=1, and reality output torque T is less than expectation phase torque T*When, B phases by State S=-1 changes to S=0, or B phases change to S=1 by state S=0, to increase reality output torque T.
Step 73, as reality output torque TIt is realMore than expectation phase torque T*When, using following state switching method, make reality Phase torque T it is expected in output torque T tracking*。
Step 731, holding C phase states are constant, and B phases state changes to S=-1 by S=0, or B phases change to S=by state S=1 0；
Step 732, if the electric current of B phases has reached the current minimum pre-set in step 2, the shape of C phases is made State changes to S=0 by S=1, even if also the torque of C phases is reduced.
In step 3, torque partition function TSF is cosine torque partition function.
In step 2, torque T it is expected*The mode that pre-sets be：The expectation rotating speed of switched reluctance machines is pre-set, so The actual speed of switched reluctance machines is tested afterwards, then by desired speed and the equal input speed PI controllers of actual speed In, produced by speed PI controllers and it is expected torque T*Signal, caused expectation torque T*Signal is input in torque controller and produced Pwm signal.
In step 4, the reality output torque T of switched reluctance machines, it is alternately produced by single-phase and two phase windings.
After the present invention uses the above method, asking for torque pulsation of the switched reluctance machines in electric operator can be reduced Topic.Specially：Torque partition function TSF is incorporated into direct instantaneous torque DITC controls, it is proposed that distribute letter based on torque Several direct Instantaneous torque control methods, the torque reference mode of traditional DITC controllers is optimized, obtaining adjacent phase torque On the basis of performance, current peak is reduced, reduces torque ripple, improves system effectiveness.In addition, rationally opened by selection Close angle and optimization switching sequence controls electric current, and then reduce torque pulsation.
Brief description of the drawings
Fig. 1 shows a kind of schematic flow sheet for the method that can reduce switched reluctance machines torque pulsation of the present invention.
Fig. 2 shows three kinds of working state schematic representations of phase winding.
Fig. 3 shows the schematic diagram of cosine torque partition function.
Fig. 4 shows commutation overlap area, B phases and C phase currents and the graph of a relation of torque.
Fig. 5 shows the switch figure in single-phase turn on process.
Fig. 6 shows the switch figure during commutation overlap.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of method that can reduce switched reluctance machines torque pulsation, comprises the following steps.
Step 1, phase winding working condition is set.
As shown in Fig. 2 per two main switching devices Q1, Q2 in the equal correspondent transform device of phase winding and two diode D1, D2；Main switching device Q1, corresponding phase winding and main switching device Q2 are in series successively；Diode D1 inverse parallels are in main switching device Q1 and corresponding phase winding outside, diode D2 inverse parallels are on the outside of main switching device Q2 and corresponding phase winding.
Working condition per phase winding is respectively provided with tri- kinds of states of S=1, S=0 and S=-1, and the method to set up of three kinds of states is such as Under：
State S=1 method to set up is：Main switching device Q1, Q2 are simultaneously open-minded, and busbar voltage supplies to corresponding phase winding Electricity, now, the both end voltage of the phase winding is+U.Electric current in machine winding will increase sharply, if this process is in inductance Rising area, the electromagnetic torque of motor will quickly increase.
State S=0 method to set up is：Main switching device Q1 is individually open-minded, main switching device Q2 shut-offs, machine winding electricity Stream carries out afterflow by diode D1, and now machine winding both ends applied voltage is 0, if this state S=0, but due to reality The conducting voltage of resistance and power device be can not ignore in upper machine winding, and electric current will be slow in machine winding in this case It is slow to reduce, if this process will be reduced slowly in inductance rising area, the electromagnetic torque of motor.
State S=-1 method to set up is：Main switching device Q1, Q2 are simultaneously turned off, and corresponding phase winding electric current passes through two poles Pipe D1, D2 carry out afterflow, and now, the both end voltage of the phase winding is-U.
Due to the negative busbar voltage of now winding both ends application, the electric current on winding will be reduced rapidly, if this process exists Inductance rising area, the electromagnetic torque of motor is by rapid decrease.
So, each phase winding there is three kinds of working conditions, and under different level states, its electric current decrease speed is Different, it can be switched in different situations according to operation needs.
Step 2, parameter is pre-set：Pre-set and it is expected torque T*, deviation delta T inside stagnant ringminAnd in every phase winding Current minimum.
Above-mentioned expectation torque T*The mode that pre-sets be preferably：The expectation rotating speed of switched reluctance machines is pre-set, so The actual speed of switched reluctance machines is tested afterwards, then by desired speed and the equal input speed PI controllers of actual speed In, produced by speed PI controllers and it is expected torque T*Signal, caused expectation torque T*Signal is input in torque controller and produced Pwm signal.
Step 3, it is expected that phase torque distributes：The expectation torque T for being pre-set step 2 using torque partition function TSF*Point Dispensing is per phase winding.
Torque partition function is workable, and algorithm is simple, can substantially reduce torque pulsation.
Desired output torque can be distributed to every phase winding by torque partition function according to setting, and then make output torque It is constant.Because the synthesis torque of winding is definite value, so torque pulsation can be very low during commutation.Assuming that distribute letter desired torque Number is arranged to trapezoidal, and the slope of the torque drop of previous phase winding is constant, and it is also constant that the torque of next phase winding, which rises, 's.
K phase winding torque partition functions can be defined as fk(θ), it must is fulfilled for following condition:
All it is positive region in adjacent two phase inductances slope, two phase windings all produce positive torque.
In the present invention, torque partition function TSF is preferably cosine torque partition function as shown in Figure 3, therefore in certain journey The nonlinear characteristic of inductance is reflected on degree, can more effectively reduce torque pulsation.
For cosine torque partition function in commutation, using cosine curve, cosine function reflects inductance to a certain extent It is non-linear.Cosine partition function formula is as follows：
ffall(θ)=1-frise(θ)
In formula, frise(θ) represents inductance rising area torque partition function；frise(θ) represents that inductance declines area's torque distribution letter Number.Step 4, reality output torque obtains：By the way that switched reluctance machines are carried out with direct measurement or the method for calculating, switch is obtained The reality output torque T of reluctance motor.
The computational methods of reality output torque：Closed by test prototype to obtain the numerical value between torque-current-angle System, the electric current of real electrical machinery winding and current rotor-position are measured, current actual torque is obtained by tabling look-up.
The reality output torque T of switched reluctance machines, is alternately produced by single-phase and two phase windings.
Step 5, phase torque deviation Δ T is calculated in real time：Using torque controller, the automatic phase that calculates in real time turns as follows Square deviation delta T.
Δ T=T*-T
It is non-linear especially strong due to SRM, so torque partition function can not embody the non-linear of its completely.Single-phase It is exactly single-phase torque to turn on area's synthesis torque, it is expected that torque T* is divided into adjacent winding torque reference sum in commutation overlap area.
T*=T*(k)+T*(k+1)
When it is expected torque T* mono- regularly, its current waveform is as shown in Figure 4.As shown in Figure 4, when main power circuit can reach with On track during the requirement of desired current waveform, its torque just can keep constant.But due to DC voltage, translation circuit The limitation of the size of power, its electric current tend not to meet to require.Traditional hystersis controller, the current fluctuation of output are compared Greatly, decline area in inductance and produce larger negative torque.In lower-speed state, for fixed turn-on angle and shut-off angle, electric current There is one-to-one relation with torque.When electric current reaches stable, its torque can also reach stable.
In order to more preferably protrude the characteristic of direct instantaneous torque, the present invention uses the method for torque Hysteresis control, namely adopts The characteristic according to torque is formed into switching signal with hystersis controller.
Torque Hysteresis control includes single-phase conducting area's Hysteresis control and commutation overlap area Hysteresis control, specific as follows.
Step 6, single-phase conducting area's Hysteresis control：As shown in figure 5, in single-phase conducting area, by the criterion of direct instantaneous torque, Namely torque partition function TSF understands that the working condition of phase winding only has S=1 and two kinds of S=0；Pressed using hystersis controller The automatic switchover of two kinds of working conditions of S=1 and S=0 is realized according to following steps.
Step 61, working condition S=1：When reality output torque T reduces, and the phase torque deviation Δ that step 5 calculates in real time T is more than deviation delta T inside the default stagnant ring of step 2minWhen, single-phase conducting area is in S=1 working condition；Now, this mutually around The both end voltage of group is+U, and reality output torque T will increase.
Step 62, working condition S=0：When reality output torque T increases, and the phase torque deviation Δ that step 5 calculates in real time T is less than deviation-Δ T inside the default stagnant ring of step 2minWhen；The working condition that conducting area automatically switches to S=0 is oriented to, now, Reality output torque T will reduce.
Step 63, repeat step 61 and step 62, make it is expected phase torque T in reality output torque T tracking*。
Step 7, commutation overlap area Hysteresis control：As shown in Figure 6, it is assumed that two phase windings for being related to commutation are respectively B phases and C Phase, in commutation overlap area, realize B phases working condition to the automatic of C phase working conditions in accordance with the following steps using hystersis controller Switching.
Step 71, the commutation original state of B phases and C phases：When commutation just starts, the electric current energy rapid decrease of B phases it is expected, with Prevent electric current from flowing into inductance and declining area, B phases have tri- kinds of states of S=1, S=0 and S=-1；It is expected that C phase currents can rise rapidly, To produce enough torques, C phases have S=0 and S=1 two states.
Step 72, as reality output torque TIt is realLess than expectation phase torque TPhaseWhen, using following state switching method, make reality Phase torque T it is expected in output torque T tracking*。
Step 721, holding B phase states are constant, and C phase states are changed into S=1 from S=0.
Step 722, if C phase states have been S=1, and reality output torque T is less than expectation phase torque T*When, B phases by State S=-1 changes to S=0, or B phases change to S=1 by state S=0, to increase reality output torque T.
Step 73, as reality output torque TIt is realMore than expectation phase torque T*When, using following state switching method, make reality Phase torque T it is expected in output torque T tracking*。
Step 731, holding C phase states are constant, and B phases state changes to S=-1 by S=0, or B phases change to S=by state S=1 0；
Step 732, if the electric current of B phases has reached the current minimum pre-set in step 2, the shape of C phases is made State changes to S=0 by S=1, even if also the torque of C phases is reduced.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this A little equivalents belong to protection scope of the present invention.

Claims (4)

  1. A kind of 1. method that can reduce switched reluctance machines torque pulsation, it is characterised in that：Comprise the following steps：
    Step 1, phase winding working condition is set：Per two main switching devices Q1, Q2 and two in the equal correspondent transform device of phase winding Diode D1, D2；Main switching device Q1, corresponding phase winding and main switching device Q2 are in series successively；Diode D1 inverse parallels On the outside of main switching device Q1 and corresponding phase winding, diode D2 inverse parallels are on the outside of main switching device Q2 and corresponding phase winding； Working condition per phase winding is respectively provided with tri- kinds of states of S=1, S=0 and S=-1, and the method to set up of three kinds of states is as follows：State S =1 method to set up is：Main switching device Q1, Q2 are simultaneously open-minded, and busbar voltage is to corresponding phase winding power supply, now, this mutually around The both end voltage of group is+U；
    State S=0 method to set up is：Main switching device Q1 is individually open-minded, main switching device Q2 shut-offs, machine winding current warp Cross diode D1 and carry out afterflow, now, the both end voltage of the phase winding is 0；
    State S=-1 method to set up is：Main switching device Q1, Q2 are simultaneously turned off, corresponding phase winding electric current by diode D1, D2 carries out afterflow, and now, the both end voltage of the phase winding is-U；
    Step 2, parameter is pre-set：Pre-set and it is expected torque T*, deviation delta T inside stagnant ringminAnd the electricity in every phase winding Flow minimum value；
    Step 3, it is expected that phase torque distributes：The expectation torque T for being pre-set step 2 using torque partition function TSF*Distribute to Per phase winding；
    Step 4, reality output torque obtains：By the method to switched reluctance machines progress direct measurement or calculating, acquisition is opened Close the reality output torque T of reluctance motor；
    Step 5, phase torque deviation Δ T is calculated in real time：Using torque controller, the automatic phase torque of calculating in real time is inclined as follows Poor Δ T；
    Δ T=T*-T
    Step 6, single-phase conducting area's Hysteresis control：In single-phase conducting area, from the criterion of direct instantaneous torque, the work of phase winding Making state only has S=1 and two kinds of S=0；Realize two kinds of work shapes of S=1 and S=0 in accordance with the following steps using hystersis controller The automatic switchover of state；
    Step 61, working condition S=1：When reality output torque T reductions, and the phase torque deviation Δ T that step 5 calculates in real time is big The deviation delta T inside the default stagnant ring of step 2minWhen, single-phase conducting area is in S=1 working condition；Now, the phase winding Both end voltage is+U, and reality output torque T will increase；
    Step 62, working condition S=0：When reality output torque T increases, and the phase torque deviation Δ T that step 5 calculates in real time is small Deviation-Δ T inside the default stagnant ring of step 2minWhen；The working condition that conducting area automatically switches to S=0 is oriented to, it is now, real Border output torque T will reduce；
    Step 63, repeat step 61 and step 62, make it is expected phase torque T in reality output torque T tracking*；
    Step 7, commutation overlap area Hysteresis control：Assuming that two phase windings for being related to commutation are respectively B phases and C phases, in commutation overlap Area, realize automatic switchover of the B phases working condition to C phase working conditions in accordance with the following steps using hystersis controller；
    Step 71, the commutation original state of B phases and C phases：When commutation just starts, the electric current energy rapid decrease of B phases it is expected, to prevent Electric current flows into inductance and declines area, and B phases have tri- kinds of states of S=1, S=0 and S=-1；It is expected that C phase currents can rise rapidly, with production Raw enough torques, C phases have S=0 and S=1 two states；
    Step 72, as reality output torque TIt is realLess than expectation phase torque TPhaseWhen, using following state switching method, make reality output Phase torque T it is expected in torque T tracking*；
    Step 721, holding B phase states are constant, and C phase states are changed into S=1 from S=0；
    Step 722, if C phase states have been S=1, and reality output torque T is less than expectation phase torque T*When, B phases are by state S =-1 changes to S=0, or B phases change to S=1 by state S=0, to increase reality output torque T；
    Step 73, as reality output torque TIt is realMore than expectation phase torque T*When, using following state switching method, make reality output Phase torque T it is expected in torque T tracking*；
    Step 731, holding C phase states are constant, and B phases state changes to S=-1 by S=0, or B phases change to S=0 by state S=1；
    Step 732, if the electric current of B phases has reached the current minimum pre-set in step 2, the state of C phases is made by S =1 changes to S=0, even if also the torque of C phases is reduced.
  2. 2. the method according to claim 1 that switched reluctance machines torque pulsation can be reduced, it is characterised in that：In step 3, Torque partition function TSF is cosine torque partition function.
  3. 3. the method according to claim 1 that switched reluctance machines torque pulsation can be reduced, it is characterised in that：In step 2, It is expected torque T*The mode that pre-sets be：The expectation rotating speed of switched reluctance machines is pre-set, then to switched reluctance machines Actual speed tested, then by desired speed and the equal input speed PI controllers of actual speed, controlled by speed PI Device, which produces, it is expected torque T*Signal, caused expectation torque T*Signal, which is input in torque controller, produces pwm signal.
  4. 4. the method according to claim 3 that switched reluctance machines torque pulsation can be reduced, it is characterised in that：In step 4, The reality output torque T of switched reluctance machines, is alternately produced by single-phase and two phase windings.
CN201710674173.5A 2017-08-09 2017-08-09 A kind of method that can reduce switched reluctance machines torque pulsation Pending CN107425783A (en)

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Cited By (5)

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CN108631676A (en) * 2018-05-16 2018-10-09 无锡联力电子科技股份有限公司 Based on the switched reluctance motor controller anti-shaking method evenly distributed with torque
CN108900132A (en) * 2018-06-29 2018-11-27 南京理工大学 Switch reluctance motor control method based on genetic algorithm and torque partition function
CN108923716A (en) * 2018-08-20 2018-11-30 西安科技大学 Switch reluctance motor control method based on error matching PWM-DITC
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108631676A (en) * 2018-05-16 2018-10-09 无锡联力电子科技股份有限公司 Based on the switched reluctance motor controller anti-shaking method evenly distributed with torque
CN108900132A (en) * 2018-06-29 2018-11-27 南京理工大学 Switch reluctance motor control method based on genetic algorithm and torque partition function
CN108923716A (en) * 2018-08-20 2018-11-30 西安科技大学 Switch reluctance motor control method based on error matching PWM-DITC
WO2020073422A1 (en) * 2018-10-09 2020-04-16 中车大同电力机车有限公司 High-power switched reluctance motor and system, control method, and controller
CN111030408A (en) * 2018-10-09 2020-04-17 中车大同电力机车有限公司 High-power switched reluctance motor, system and control method
WO2020098538A1 (en) * 2018-11-13 2020-05-22 南京航空航天大学 Torque control method for doubly salient electro-magnetic electric motor

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Application publication date: 20171201