CN106559016B - A kind of the voltage chopping control method and device of switched reluctance machines - Google Patents
A kind of the voltage chopping control method and device of switched reluctance machines Download PDFInfo
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Abstract
This application discloses a kind of control method of switched reluctance machines and device, the control method and device are applied to voltage chopping control system.Whether this method and device detection switch reluctance motor first are in single-phase conducting phase, are controlled with the dutyfactor value of proportional integration module output the duty ratio of the driving voltage of current phase if in single-phase conducting phase；The duty ratio of the driving voltage of the duty ratio to the driving voltage of current phase and next phase is adjusted respectively after adjusting accordingly proportional integration module output duty cycle value if in the overlapping commutation stage, will the duty ratio of driving voltage of current phase turn down, it is opposite then by the duty ratio of the driving voltage of next phase be turned up, it is essentially identical with the phase current magnitude before commutation when single-phase conducting to control the sum of overlapping commutation stage biphase current amplitude, so as to which torque pulsation when overlapping commutation is greatly decreased, the running noises of switched reluctance machines can also be greatly reduced.
Description
Technical field
This application involves motor drag technical fields, more specifically to a kind of voltage chopping of switched reluctance machines
Control method and device.
Background technique
Control method applied to switched reluctance machines traditionally has Current cut control method (CCC), voltage chopping control
Method (CVC) processed, Angle-domain imaging method (APC).Wherein Current cut control method is usually used in low speed control, angle position
Controlling party rule is usually used in High-speed Control, and voltage chopping controlling party rule can be not only used for low speed and can also be used at a high speed, comparing it
His two kinds of control method its application ranges are more more extensive.Fig. 1 is the voltage chopping control method of switched reluctance machines
Control block diagram, when switched reluctance machines are in the overlapping commutation stage, because week mutually and locating for next phase is respectively connected in current conducting
The different phase of phase, and its identical duty ratio can generate the electric current of different lifting proportionals, so that biggish torque arteries and veins can be generated
It is dynamic, and then will lead to switched reluctance machines and generate biggish running noises at runtime.
Summary of the invention
In view of this, the application provides the voltage chopping control method and device of a kind of switched reluctance machines, for split
It closes reluctance motor to be controlled, to reduce the running noises of the switched reluctance machines.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of control method of switched reluctance machines, applied to the voltage chopping control system of the switched reluctance machines,
Include:
Detect whether the switched reluctance machines are in single-phase conducting phase；
It is such as in the single-phase conducting phase, then is exported using the proportional integration device of the voltage chopping control system
Dutyfactor value controls the duty ratio of the driving voltage of current phase；
The single-phase conducting phase as described in being not in, and by the dutyfactor value multiplied by default first proportionality coefficient to described
The duty ratio of the driving voltage of current phase is controlled, and default first proportionality coefficient is the positive number less than 1；
Meanwhile by the dutyfactor value multiplied by default second proportionality coefficient to the driving voltage of next phase of the current phase
Duty ratio controlled, default second proportionality coefficient is the positive number greater than 1.
Optionally, default first proportionality coefficient is also modified by following steps:
Judge whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default first current differential；
Such as less than or equal to described default first current differential, then be not modified default first proportionality coefficient；
Such as larger than described default first current differential, then it is pre- to judge whether the increasing degree of the driving current of the current phase is less than
If the first electric current increasing degree；
The such as less than or equal to described default first electric current increasing degree, then reduce default first for default first proportionality coefficient
Correction value；
The such as larger than described default first electric current increasing degree, then reduce default second amendment for default first proportionality coefficient
Value；Second correction value is greater than first correction value；
Whether the difference of the monophase current before judging the sum of biphase current and commutation when commutation overlap conducting is greater than default the
Two current differentials；
Such as less than or equal to described default second current differential then stops correcting；
The such as larger than described default second electric power difference, then back to the increasing degree for the driving current for judging the current phase whether
Less than the default first electric current increasing degree step.
Optionally, default first current differential is the 10% of the average running current of the switched reluctance machines；
The default first electric current increasing degree is the 20% of the average running current；
Default second current differential is the 10% of the average running current.
Optionally, default second proportionality coefficient is also modified by following steps:
Judge whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default third current differential；
The default third current differential such as less than or equal to is not modified default second proportionality coefficient then；
The such as larger than described default third current differential then judges that the increasing degree of the driving current of next phase of the current phase is
It is no to be less than default second electric current increasing degree；
The such as less than or equal to described default second electric current increasing degree, then increase default third for default second proportionality coefficient
Correction value；
The such as larger than described default second electric current increasing degree, then increase default 4th amendment for default second proportionality coefficient
Value；4th correction value is greater than the third correction value；
Whether the difference of the monophase current before judging the sum of biphase current and commutation when commutation overlap conducting is greater than default the
Four current differentials；
Such as less than or equal to described default 4th current differential then stops correcting；
The such as larger than described default 4th electric power difference, then back to the increasing degree for the driving current for judging next phase whether
Less than the default second electric current increasing degree step.
Optionally, the default third current differential is the 10% of the average running current of the switched reluctance machines；
The default second electric current increasing degree is the 20% of the average running current；
Default 4th current differential is the 10% of the average running current.
A kind of control device of switched reluctance machines, applied to the voltage chopping control system of the switched reluctance machines,
Include:
Commutation detection module, for detecting whether the switched reluctance machines are in single-phase conducting phase, when the switch
Output single-phase Continuity signal when reluctance motor is in single-phase conducting phase, otherwise exports commutation signal；
First occupancy controller, for the ratio according to the single-phase Continuity signal and the voltage chopping control system
The dutyfactor value of integrating gear output controls the duty ratio of the inverter of the voltage chopping control system；
Second occupancy controller is used for the dutyfactor value according to the commutation signal multiplied by default first ratio system
The duty ratio of several driving voltages to the current phase controls, and default first proportionality coefficient is the positive number less than 1, together
When be also used to the dutyfactor value the accounting for the driving voltage of next phase of the current phase multiplied by default second proportionality coefficient
Empty ratio is controlled, and default second proportionality coefficient is the positive number greater than 1.
It optionally, further include default first proportionality coefficient correction module, the default first proportionality coefficient correction module packet
It includes:
First judging unit, for judging whether adjacent two commutation points eve single-phase electricity flow valuve difference is greater than default first
Current differential；Such as less than or equal to described default first current differential, then be not modified default first proportionality coefficient；
Second judgment unit is greater than described default for the difference such as the adjacent two commutation points eve single-phase electricity flow valuve
When one current differential, judge whether the increasing degree of the driving current of the current phase is less than default first electric current increasing degree, such as less than or
The first revision directive is then exported equal to the first electric current increasing degree, otherwise exports the second revision directive；
First amending unit presets for reducing default first proportionality coefficient according to first revision directive
One correction value；
Second amending unit presets for reducing default first proportionality coefficient according to second revision directive
Two correction values；Second correction value is greater than first correction value；
Third judging unit, for the sum of biphase current when judging commutation overlap conducting and the monophase current before commutation it
Whether difference is greater than default second current differential；Such as less than or equal to described default second current differential then stops correcting；Such as larger than
Default second current differential, then controlling the second judgment unit and continuing is to the increasing degree of the driving current of the current phase
It is no to be judged less than the default first electric current increasing degree.
Optionally, default first current differential is the 10% of the average running current of the switched reluctance machines；
The default first electric current increasing degree is the 20% of the average running current；
Default second current differential is the 10% of the average running current.
It optionally, further include the second proportionality coefficient correction module, the default second proportionality coefficient correction module includes:
4th judging unit, for judging whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default third
Current differential；The default third current differential such as less than or equal to is not modified default second proportionality coefficient then；
5th judging unit is greater than described default for the difference when the adjacent two commutation points eve single-phase electricity flow valuve
When three current differentials, judge whether the increasing degree of the driving current of next phase of the current phase is less than default second electric current increasing degree,
The such as less than or equal to described default second electric current increasing degree then exports third revision directive, otherwise exports the 4th revision directive；
Third amending unit presets for increasing default second proportionality coefficient according to the third revision directive
Three correction values；
4th amending unit presets for increasing default second proportionality coefficient according to the 4th revision directive
Four correction values；4th correction value is greater than the third correction value；
6th judging unit, for the sum of biphase current when judging commutation overlap conducting and the monophase current before commutation it
Whether difference is greater than default 4th current differential；Such as less than or equal to described default 4th current differential then stops correcting；Such as larger than
Default 4th current differential, then control the 5th judging unit and continue to judge the increasing degree of the driving current of next phase
Whether default second current step is less than.
Optionally, the default third current differential is the 10% of the average running current of the switched reluctance machines；
The default second electric current increasing degree is the 20% of the average running current；
Default 4th current differential is the 10% of the average running current.
It can be seen from the above technical scheme that this application discloses a kind of control method of switched reluctance machines and dresses
It sets, the control method and device are applied to voltage chopping control system.This method and device detection switch reluctance motor first are
It is no to be in single-phase conducting phase, with the dutyfactor value of proportional integration module output to current phase if in single-phase conducting phase
The duty ratio of driving voltage is controlled；Proportional integration module output duty cycle value is subjected to phase if in the overlapping commutation stage
The duty ratio of the driving voltage of the duty ratio to the driving voltage of current phase and next phase is adjusted respectively after should adjusting, i.e., will
The duty ratio of the driving voltage of current phase is turned down, and then the duty ratio of the driving voltage of next phase is turned up on the contrary, i.e. control overlapping
The sum of commutation stage biphase current amplitude is essentially identical with the phase current magnitude before commutation when single-phase conducting, so as to substantially subtract
Torque pulsation when few overlapping commutation, can also be greatly reduced the running noises of switched reluctance machines.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the control block diagram of the voltage chopping control method of switched reluctance machines provided by the present application；
Fig. 2 is a kind of flow chart of the control method of switched reluctance machines provided by the embodiments of the present application；
Fig. 3 is the flow chart of default first proportionality coefficient modification method provided by the present application；
Fig. 4 is the flow chart of default second proportionality coefficient modification method provided by the present application；
Fig. 5 is a kind of schematic diagram of the control device for switched reluctance machines that another embodiment of the application provides；
Fig. 6 is the schematic diagram of the control device of another switched reluctance machines provided by the present application；
Fig. 7 is a kind of schematic diagram of default first proportionality coefficient correction module provided by the present application；
Fig. 8 is a kind of schematic diagram of default second proportionality coefficient correction module provided by the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Embodiment one
Fig. 2 is a kind of flow chart of the control method of switched reluctance machines provided by the embodiments of the present application.
As shown in Fig. 2, control method provided in this embodiment is applied to the voltage chopping control system of switched reluctance machines,
Specific control method step as described below:
S101: whether detection switch reluctance motor is in single-phase conducting phase.
In the voltage chopping control system of switched reluctance machines, the general position signal that rotor is detected by encoder,
By the way that location information of the rotor relative to stator is calculated to the position signal.Pass through the judgement to the location information
It determines whether switched reluctance machines are in single-phase conducting phase, if being in single-phase conducting phase, thens follow the steps S102；If not
It is then to illustrate that switched reluctance machines enter the overlapping conducting stage in single-phase conducting phase, i.e., it is current mutually and when next identical to lead
It is logical, step S103 is executed at this time.
S102: keep current duty cycle constant.
If switched reluctance machines are in single-phase conducting phase, by the proportional integration device in voltage chopping control system
The dutyfactor value of output is directly output to inverter, is controlled with duty ratio of the current duty cycle value to the driving voltage of current phase
System.
S103: the duty ratio of duty ratio and next phase to current phase is adjusted.
If switched reluctance machines are not in single-phase conducting phase, i.e. switched reluctance machines enter the overlapping conducting stage,
It is specifically exactly that its current phase is mutually simultaneously turned on next.The dutyfactor value for then at this time exporting proportional integration device is multiplied by default
First proportionality coefficient, then inputs inverter, is controlled with the duty ratio of the driving voltage to current phase；It is accounted for simultaneously by above-mentioned
Then empty ratio inputs inverter, multiplied by default second proportionality coefficient with the duty of the driving voltage of next phase to current phase
Than being controlled.
Above-mentioned default first proportionality coefficient is the positive number less than 1, and presetting the second proportionality coefficient is the positive number greater than 1.
It can be seen from the above technical proposal that a kind of control method of switched reluctance machines is present embodiments provided, the control
Method processed is applied to voltage chopping control system.Whether this method detection switch reluctance motor first is in single-phase conducting phase,
As if the single-phase conducting phase with the dutyfactor value of proportional integration module output to the duty ratio of the driving voltage of current phase into
Row control；Respectively to current after proportional integration module output duty cycle value is adjusted accordingly if in the overlapping commutation stage
The duty ratio of the driving voltage of the duty ratio of the driving voltage of phase and next phase is adjusted, i.e., by the driving voltage of current phase
Duty ratio is turned down, and then the duty ratio of the driving voltage of next phase is turned up on the contrary, i.e. control overlapping commutation stage biphase current width
The sum of value is essentially identical with the phase current magnitude before commutation when single-phase conducting, so as to which torque when overlapping commutation is greatly decreased
Pulsation, can also be greatly reduced the running noises of switched reluctance machines.
The first proportionality coefficient is preset in the present embodiment and default second proportionality coefficient is an adaptation switching magnetic-resistance electricity
The variable of the driving current of machine, which can demarcate in advance, and be modified in motor operation course, specific makeover process
As described below.
The amendment step of default first proportionality coefficient is as shown in Figure 3, comprising:
S201: judge whether the difference of current value is greater than default first current differential.
Single-phase electric current before adjacent two commutation point is recorded and compared respectively, when the single-phase reality is current conducting
Mutually with the independent conducting phase of next operation phase, i.e., next phase of phase, electricity when then this two-phase being individually connected currently is connected
Stream asks poor, is compared as the difference of so-called current value, and with default first current differential.Default first current differential is excellent
Select the 10% of the average running current of the switched reluctance machines.
If the difference of adjacent two commutation points eve single-phase electricity flow valuve is less than default first current differential, terminate to correct,
Default first proportionality coefficient is not modified.
S202: judge whether the increasing degree of the driving current of current phase is less than default first electric current increasing degree.
The 20% of the average running current of the default first electric current increasing degree preferably switched reluctance machines.
S203: default first proportionality coefficient is reduced into default first correction value.
If the increasing degree is less than or equal to default first electric current increasing degree, default first proportionality coefficient is reduced default first
Then correction value executes step S205.
S204: default first proportionality coefficient is reduced into default second correction value.
If the increasing degree is greater than default first electric current increasing degree, default first proportionality coefficient is reduced into default second amendment
Then value executes step S205.
When choosing default first correction value noted earlier and default second correction value, need to consider that precision controlling is wanted
Summation real system parameter, the smaller then system accuracy of choosing is higher, but accordingly will increase the calculation amount of system, causes system not
Stablize.Also, default second correction value is greater than default first correction value.
S205: judging biphase current and whether is less than default second current differential.
Current conducting phase after having carried out the amendment of step S203 or step S204, during further judging overlapping commutation
With the two-phase-region casting electric current of next phase and whether less than default second current differential, the default second current differential preferably switch
The 10% of average running current of the reluctance motor under current load situation.
If biphase current and being less than default second current differential, terminate this amendment, if being also greater than default the
Two current differentials then go to step S202.
The climbing of running current is also an option that for default first electric current increasing degree mentioned above, in the present embodiment
A concrete application in, the power of switched reluctance machines is that 8kW can be obtained when select 30A/s as climbing is controlled
Good control effect.
The amendment step of default second proportionality coefficient is as shown in Figure 4, comprising:
S301: judge whether the difference of current value is greater than default third current differential.
Single-phase electric current before adjacent two commutation point is recorded and compared respectively, when the single-phase reality is current conducting
Mutually with the independent conducting phase of next operation phase, i.e., next phase of phase, electricity when then this two-phase being individually connected currently is connected
Stream asks poor, is compared as the difference of so-called current value, and with default third current differential.
The 10% of the average running current of the default third current differential preferably switched reluctance machines.
If the difference of adjacent two commutation points eve single-phase electricity flow valuve is less than default third current differential, terminate to correct,
Default third proportionality coefficient is not modified.
S302: judge whether the increasing degree of the driving current of next phase is less than default second electric current increasing degree.
The 20% of the average running current of the default second electric current increasing degree preferably switched reluctance machines.
S303: default second proportionality coefficient is increased into default third correction value.
If the increasing degree is less than or equal to default second electric current increasing degree, default second proportionality coefficient is reduced into default third
Then correction value executes step S305.
S304: default second proportionality coefficient is increased into default 4th correction value.
If the increasing degree is greater than default second electric current increasing degree, default second proportionality coefficient is reduced into default 4th amendment
Then value executes step S305.
When choosing default third correction value noted earlier and default four correction value, need to consider that precision controlling is wanted
Summation real system parameter, the smaller then system accuracy of choosing is higher, but accordingly will increase the calculation amount of system, causes system not
Stablize.Also, default 4th correction value is greater than default third correction value.
S305: judging biphase current and whether is less than default 4th current differential.
Current conducting phase after having carried out the amendment of step 303 or step S304, during further judging overlapping commutation
Whether with the two-phase-region casting electric current of next phase and less than default 4th current differential, which preferably switchs magnetic
Hinder the 10% of average running current of the motor under current load situation.
Terminate this amendment if biphase current and less than default 4th current differential, if being also greater than default second
Current differential then goes to step S302.
It is identical as default third current differential to can be seen that default first current differential from practical operation step above, in advance
If the second current differential is identical as default 4th current differential, it is identical as default second electric current increasing degree to preset the first electric current increasing degree.
Embodiment two
Fig. 5 is a kind of schematic diagram of the control device for switched reluctance machines that another embodiment of the application provides.
As shown in figure 5, the control device of switched reluctance machines provided in this embodiment includes commutation detection module 10, first
Occupancy controller 20 and the second occupancy controller 30.
Commutation detection module 10 is for detecting whether the switched reluctance machines are in single-phase conducting phase.
In the voltage chopping control system of switched reluctance machines, which detects rotor by encoder
Position signal, and by the way that location information of the rotor relative to stator is calculated to the position signal.By to the position
The judgement of information can determine whether switched reluctance machines are in single-phase conducting phase, defeated if being in single-phase conducting phase
Reflect that the switched reluctance machines are in the single-phase Continuity signal of single-phase conducting phase out；Otherwise illustrate that switched reluctance machines enter weight
Folded conducting phase, i.e., it is current mutually mutually to be simultaneously turned on next, commutation signal is only exported at this time.
First occupancy controller 20 then fills the proportional integration in voltage chopping control system according to single-phase Continuity signal
The dutyfactor value for setting output is directly output to inverter, make inverter with current duty cycle value accounting for the driving voltage of current phase
Empty ratio is controlled.
The dutyfactor value that second occupancy controller 30 then exports proportional integration device according to commutation signal is multiplied by default
First proportionality coefficient, then inputs inverter, is controlled with the duty ratio of the driving voltage to current phase；It is accounted for simultaneously by above-mentioned
Then empty ratio inputs inverter, multiplied by default second proportionality coefficient with the duty of the driving voltage of next phase to current phase
Than being controlled.
Above-mentioned default first proportionality coefficient is the positive number less than 1, and presetting the second proportionality coefficient is the positive number greater than 1.
It can be seen from the above technical proposal that a kind of control device of switched reluctance machines is present embodiments provided, the control
Device processed is applied to voltage chopping control system.Whether device detection switch reluctance motor first is in single-phase conducting phase,
As if the single-phase conducting phase with the dutyfactor value of proportional integration module output to the duty ratio of the driving voltage of current phase into
Row control；Respectively to current after proportional integration module output duty cycle value is adjusted accordingly if in the overlapping commutation stage
The duty ratio of the driving voltage of the duty ratio of the driving voltage of phase and next phase is adjusted, i.e., by the driving voltage of current phase
Duty ratio is turned down, and then the duty ratio of the driving voltage of next phase is turned up on the contrary, i.e. control overlapping commutation stage biphase current width
The sum of value is essentially identical with the phase current magnitude before commutation when single-phase conducting, so as to which torque when overlapping commutation is greatly decreased
Pulsation, can also be greatly reduced the running noises of switched reluctance machines.
The first proportionality coefficient is preset in the present embodiment and default second proportionality coefficient is an adaptation switching magnetic-resistance electricity
The variable of the driving current of machine, which can demarcate in advance, and be modified in motor operation course, therefore this control fills
Set further includes presetting the first proportionality coefficient correction module 40 and for pre- for what is be modified to default first proportionality coefficient
If the default second proportionality coefficient correction module 50 that the second proportionality coefficient is modified, as shown in Figure 6.
Default first proportionality coefficient correction module as shown in fig. 7, comprises the first judging unit 41, second judgment unit 42,
Third judging unit 43, the first amending unit 44 and the second amending unit 45.
First judging unit 41 is for judging whether the difference of current value is greater than default first current differential.
That is the first judging unit 41 is used to that the single-phase electric current before adjacent two commutation point to be recorded and be compared respectively, when
The single-phase reality is currently conducting mutually with the independent conducting phase of next operation phase, i.e., next phase of phase is currently connected, then will
Electric current when this two-phase is individually connected asks poor, is compared as the difference of so-called current value, and with default first current differential.
The 10% of the average running current of the default first current differential preferably switched reluctance machines.
If the difference of adjacent two commutation points eve single-phase electricity flow valuve is less than default first current differential, terminate to correct,
Default first proportionality coefficient is not modified.
Second judgment unit 42 is used to be greater than such as the difference of the adjacent two commutation points eve single-phase electricity flow valuve described default
When the first current differential, judge whether the increasing degree of the driving current of the current phase is less than default first electric current increasing degree, such as less than
Or the first revision directive is then exported equal to the first electric current increasing degree, otherwise export the second revision directive.
The 20% of the average running current of the default first electric current increasing degree preferably switched reluctance machines.
First amending unit 44 is used to that default first proportionality coefficient to be reduced default first amendment according to the first revision directive
Value.
Second amending unit 45 is used to that default first proportionality coefficient to be reduced default second amendment according to the second revision directive
Value.
When choosing default first correction value noted earlier and default second correction value, need to consider that precision controlling is wanted
Summation real system parameter, the smaller then system accuracy of choosing is higher, but accordingly will increase the calculation amount of system, causes system not
Stablize.Also, default second correction value is greater than default first correction value.
Third judging unit 43 is used in the first amending unit 44 or the second amending unit 45 to default first ratio system
After number is modified, the current conducting during further judge overlapping commutation is mutually and the two-phase-region casting electric current of next phase and whether small
In default second current differential, the default average fortune of the preferred switched reluctance machines of second current differential under current load situation
The 10% of row electric current.
Terminate this amendment if biphase current and less than default second current differential, if being also greater than default second
The second judgment unit 42 that current differential then controls continues whether be less than described default first to the increasing degree of the driving current of current phase
Electric current increasing degree is judged.
Default second proportionality coefficient correction module as shown in figure 8, include the 4th judging unit 51, the 5th judging unit 52,
6th judging unit 53, third amending unit 54 and the 4th amending unit 55.
4th judging unit 51 is for judging whether the difference of current value is greater than default third current differential.
That is the 4th judging unit 51 is used to that the single-phase electric current before adjacent two commutation point to be recorded and be compared respectively, when
The single-phase reality is currently conducting mutually with the independent conducting phase of next operation phase, i.e., next phase of phase is currently connected, then will
Electric current when this two-phase is individually connected asks poor, is compared as the difference of so-called current value, and with default third current differential.
The 10% of the average running current of the default third current differential preferably switched reluctance machines.
If the difference of adjacent two commutation points eve single-phase electricity flow valuve is less than default third current differential, terminate to correct,
Default third proportionality coefficient is not modified.
5th judging unit 52 is used to be greater than the default third electricity when the difference of adjacent two commutation points eve single-phase electricity flow valuve
Flow difference when, judge whether the increasing degree of the driving current of next phase of current phase is less than default second electric current increasing degree, such as less than or
Third revision directive is then exported equal to the default second electric current increasing degree, otherwise exports the 4th revision directive.
The 20% of the average running current of the default second electric current increasing degree preferably switched reluctance machines.
Third amending unit 54 is used to that default second proportionality coefficient to be increased default third amendment according to third revision directive
Value.
4th amending unit 55 is used to that default second proportionality coefficient to be increased default 4th amendment according to the 4th revision directive
Value.
When choosing default third correction value noted earlier and default four correction value, need to consider that precision controlling is wanted
Summation real system parameter, the smaller then system accuracy of choosing is higher, but accordingly will increase the calculation amount of system, causes system not
Stablize.Also, default 4th correction value is greater than default third correction value.
6th judging unit 53 is used in third amending unit 54 or the 4th amending unit 55 to default second proportionality coefficient
After being modified, whether the current conducting during further judge overlapping commutation mutually and the two-phase-region casting electric current of next phase and is less than
Default 4th current differential, the default average operation of the 4th preferred switched reluctance machines of current differential under current load situation
The 10% of electric current.
Terminate this amendment if biphase current and less than default 4th current differential, if being also greater than default second
Current differential then controls the 5th judging unit 52 continues whether to be less than the increasing degree of the driving current of current phase described default first
Electric current increasing degree is judged.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, can be realized professional and technical personnel in the field or using the application.Various modifications to these embodiments are to ability
It will be apparent for the professional technician in domain, the general principles defined herein can not depart from the application's
In the case where spirit or scope, realize in other embodiments.Therefore, the application be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. a kind of control method of switched reluctance machines, applied to the voltage chopping control system of the switched reluctance machines,
It is characterized in that, comprising:
Detect whether the switched reluctance machines are in single-phase conducting phase；
It is such as in the single-phase conducting phase, then the duty exported using the proportional integration device of the voltage chopping control system
Ratio controls the duty ratio of the driving voltage of current phase；
The single-phase conducting phase as described in being not in, and by the dutyfactor value multiplied by default first proportionality coefficient to described current
The duty ratio of the driving voltage of phase is controlled, and default first proportionality coefficient is the positive number less than 1；
Meanwhile by the dutyfactor value multiplied by default second proportionality coefficient accounting for the driving voltage of next phase of the current phase
Empty ratio is controlled, and default second proportionality coefficient is the positive number greater than 1.
2. control method as described in claim 1, which is characterized in that default first proportionality coefficient also passes through following steps
It is modified:
S201 judges whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default first current differential；
Such as less than or equal to described default first current differential, then be not modified default first proportionality coefficient；
Such as larger than described default first current differential of S202, then it is pre- to judge whether the increasing degree of the driving current of the current phase is less than
If the first electric current increasing degree；
The such as less than or equal to described default first electric current increasing degree of S203, then reduce default first for default first proportionality coefficient
Correction value；
The such as larger than described default first electric current increasing degree, then reduce default second correction value for default first proportionality coefficient；Institute
The second correction value is stated greater than first correction value；
Whether the difference of the monophase current before judging the sum of biphase current when commutation overlap conducting and commutation is greater than default second electricity
Flow difference；
Such as less than or equal to described default second current differential then stops correcting；
Such as larger than described default second current differential, then return to and judge whether the increasing degree of the driving current of the current phase is less than
The default first electric current increasing degree step.
3. control method as claimed in claim 2, which is characterized in that default first current differential is the switching magnetic-resistance
The 10% of the average running current of motor；
The default first electric current increasing degree is the 20% of the average running current；
Default second current differential is the 10% of the average running current.
4. control method as described in claim 1, which is characterized in that default second proportionality coefficient also passes through following steps
It is modified:
Judge whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default third current differential；
The default third current differential such as less than or equal to is not modified default second proportionality coefficient then；
The such as larger than described default third current differential, then judge whether the increasing degree of the driving current of next phase of the current phase is small
In default second electric current increasing degree；
The such as less than or equal to described default second electric current increasing degree, then increase default third amendment for default second proportionality coefficient
Value；
The such as larger than described default second electric current increasing degree, then increase default 4th correction value for default second proportionality coefficient；Institute
The 4th correction value is stated greater than the third correction value；
Whether the difference of the monophase current before judging the sum of biphase current when commutation overlap conducting and commutation is greater than default 4th electricity
Flow difference；
Such as less than or equal to described default 4th current differential then stops correcting；
Such as larger than described default 4th current differential, then return to and judge whether the increasing degree of the driving current of next phase is less than
The default second electric current increasing degree step.
5. control method as claimed in claim 4, which is characterized in that the default third current differential is the switching magnetic-resistance
The 10% of the average running current of motor；
The default second electric current increasing degree is the 20% of the average running current；
Default 4th current differential is the 10% of the average running current.
6. a kind of control device of switched reluctance machines, applied to the voltage chopping control system of the switched reluctance machines,
It is characterized in that, comprising:
Commutation detection module, for detecting whether the switched reluctance machines are in single-phase conducting phase, when the switching magnetic-resistance
Output single-phase Continuity signal when motor is in single-phase conducting phase, otherwise exports commutation signal；
First occupancy controller, for the proportional integration according to the single-phase Continuity signal and the voltage chopping control system
The dutyfactor value of device output controls the duty ratio of the inverter of the voltage chopping control system；
Second occupancy controller is used for the dutyfactor value according to the commutation signal multiplied by default first proportionality coefficient pair
The duty ratio of the driving voltage of current phase is controlled, and default first proportionality coefficient is the positive number less than 1, is also used to simultaneously
The dutyfactor value is carried out multiplied by duty ratio of default second proportionality coefficient to the driving voltage of next phase of the current phase
Control, default second proportionality coefficient are the positive number greater than 1；
Default first proportionality coefficient correction module, the default first proportionality coefficient correction module include:
First judging unit, for judging whether adjacent two commutation points eve single-phase electricity flow valuve difference is greater than default first electric current
Difference；Such as less than or equal to described default first current differential, then be not modified default first proportionality coefficient；
Second judgment unit is greater than default first electricity for the difference such as the adjacent two commutation points eve single-phase electricity flow valuve
When flowing difference, judge whether the increasing degree of the driving current of the current phase is less than default first electric current increasing degree, such as less than or equal to
The first electric current increasing degree then exports the first revision directive, otherwise exports the second revision directive；
First amending unit is repaired for default first proportionality coefficient to be reduced default first according to first revision directive
Positive value；
Second amending unit is repaired for default first proportionality coefficient to be reduced default second according to second revision directive
Positive value；Second correction value is greater than first correction value；
Third judging unit, for judging that the difference of the sum of biphase current when commutation overlap conducting and the monophase current before commutation is
It is no to be greater than default second current differential；Such as less than or equal to described default second current differential then stops correcting；It is such as larger than described
Default second current differential, then control the second judgment unit continue it is whether small to the increasing degree of the driving current of the current phase
Judged in the default first electric current increasing degree；
Second proportionality coefficient correction module, the default second proportionality coefficient correction module include:
4th judging unit, for judging whether the difference of adjacent two commutation points eve single-phase electricity flow valuve is greater than default third electric current
Difference；The default third current differential such as less than or equal to is not modified default second proportionality coefficient then；
5th judging unit is greater than the default third electricity for the difference when the adjacent two commutation points eve single-phase electricity flow valuve
When flowing difference, judge whether the increasing degree of the driving current of next phase of the current phase is less than default second electric current increasing degree, it is such as small
Third revision directive is then exported in or equal to the default second electric current increasing degree, otherwise exports the 4th revision directive；
Third amending unit is repaired for default second proportionality coefficient to be increased default third according to the third revision directive
Positive value；
4th amending unit is repaired for default second proportionality coefficient to be increased the default 4th according to the 4th revision directive
Positive value；4th correction value is greater than the third correction value；
6th judging unit, for judging that the difference of the sum of biphase current when commutation overlap conducting and the monophase current before commutation is
It is no to be greater than default 4th current differential；Such as less than or equal to described default 4th current differential then stops correcting；It is such as larger than described
Default 4th current differential, then control the 5th judging unit continue to judge the driving current of next phase increasing degree whether
Less than default second current step.
7. control device as claimed in claim 6, which is characterized in that default first current differential is the switching magnetic-resistance
The 10% of the average running current of motor；
The default first electric current increasing degree is the 20% of the average running current；
Default second current differential is the 10% of the average running current.
8. control device as claimed in claim 6, which is characterized in that the default third current differential is the switching magnetic-resistance
The 10% of the average running current of motor；
The default second electric current increasing degree is the 20% of the average running current；
Default 4th current differential is the 10% of the average running current.
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| CN108712132B (en) * | 2018-05-26 | 2022-02-22 | 太原理工大学 | Current fluctuation control method for reducing current chopping control mode of switched reluctance motor |
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