CN106655953A - Electrolytic-capacitor-free motor driving system and field weakening control method and device thereof - Google Patents
Electrolytic-capacitor-free motor driving system and field weakening control method and device thereof Download PDFInfo
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- CN106655953A CN106655953A CN201610899820.8A CN201610899820A CN106655953A CN 106655953 A CN106655953 A CN 106655953A CN 201610899820 A CN201610899820 A CN 201610899820A CN 106655953 A CN106655953 A CN 106655953A
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- bar voltage
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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
- H02P23/0086—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for high speeds, e.g. above nominal speed
- H02P23/009—Arrangements or methods for the control of AC motors characterised by a control method other than vector control specially adapted for high speeds, e.g. above nominal speed using field weakening
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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
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
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- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses an electrolytic-capacitor-free motor driving system and a field weakening control method and device thereof. The field weakening control method comprises a present DC bus voltage in the motor driving system is obtained in real time; according to known correspondence between the DC bus voltage and an integral coefficient of a processor, the coefficient corresponding to the present DC bus voltage is obtained and serves as a present integral coefficient; an objective field-weakening current is obtained according to the present DC bus voltage, a present objective voltage and the present integral coefficient; and field weakening control of the motor driving system is executed according to the objective field-weakening current. Thus, requirements for motor rotation speed control of the electrolytic-capacitor-free motor driving system can be met.
Description
Technical field
The invention belongs to technical field of motors, is to be related to no electrolytic capacitor motor driven systems and its weak magnetic specifically
Control method and control device.
Background technology
With continuous lifting of the user to electronic product performance requirement, life-span and lower electroless of in hgher efficiency, cost
Capacitor motor drive system has obtained increasingly being widely applied.No electrolytic capacitor motor driven systems be eliminate Large Copacity,
High cost, the electrochemical capacitor of short life and step-up device, the substitute is the thin-film capacitor of little capacity, low cost, life-span length
Or ceramic condenser.
In motor driven systems, when motor speed is higher, the counter electromotive force that rotor cutting stator coil is produced
Also it is higher.Energy is provided in order to rotate to motor, the problem for falling the energy input difficulty that high counter electromotive force brings, tradition is overcome
Motor driven systems the DC bus-bar voltage after rectification can be lifted by step-up device and big capacity electrolyte capacitor.And direct current
When busbar voltage reaches the restriction of lifting, it is necessary to weaken rotor field using weak magnetic technology, to reduce counter electromotive force generation
Voltage, reach continue to motor rotate input capability, lifted rotating speed purpose.In this no electrolytic capacitor motor driven systems
In, due to eliminating jumbo electrochemical capacitor and step-up device, want the rotating speed of lifting motor, weak magnetic control can only be carried out.
And due to the busbar voltage after the no electrolytic capacitor motor driven systems rectification for removing electrochemical capacitor and step-up device and tradition electricity
Machine drive system difference is larger, and traditional field weakening control method is difficult to meet motor speed demand for control.
The content of the invention
On the one hand the purpose of the present invention is to provide a kind of field weakening control method and the control of no electrolytic capacitor motor driven systems
Device processed, meets the demand that no electrolytic capacitor motor driven systems are controlled motor speed.
For achieving the above object, the field weakening control method of the no electrolytic capacitor motor driven systems that the present invention is provided is adopted
It is achieved with following technical proposals：
A kind of field weakening control method of no electrolytic capacitor motor driven systems, methods described includes：
The current DC bus-bar voltage in motor driven systems is obtained in real time；
Obtained and the current direct current according to the corresponding relation of known DC bus-bar voltage and the integral coefficient of processor
The corresponding integral coefficient of busbar voltage, as current integration coefficient；The DC bus-bar voltage and the integral coefficient of processor
Corresponding relation meets the amplitude and the integral coefficient correlation of the DC bus-bar voltage；
Target weak magnetic electricity is obtained according to the current DC bus-bar voltage, current goal voltage and the current integration coefficient
Stream；The current goal voltage determines according to current goal motor speed；
Controlled according to the weak magnetic of the target weak magnetoelectricity stream actuating motor drive system.
Method as above, it is described according to the current DC bus-bar voltage, current goal voltage and described to work as foreset
Divide coefficient to obtain target weak magnetoelectricity stream, specifically include：
The difference of the current DC bus-bar voltage and current goal voltage is obtained, based on current integration coefficient correspondence
Processor carry out proportional integral process to the difference, obtain the target weak magnetoelectricity stream；During the proportional integral is processed
Integral coefficient is the current integration coefficient, and the proportionality coefficient during the proportional integral is processed is fixed coefficient.
Method as above, the acquisition current DC bus-bar voltage and the difference of current goal voltage, are based on
The corresponding processor of the current integration coefficient carries out proportional integral process to the difference, obtains the target weak magnetoelectricity stream,
Specifically also include：
The difference of the current DC bus-bar voltage and current goal voltage is obtained, based on current integration coefficient correspondence
Processor carry out proportional integral process to the difference, obtain basic weak magnetoelectricity stream, amplitude limit is made to the basic weak magnetoelectricity stream
Process, the output result after amplitude limiting processing is defined as the target weak magnetoelectricity stream.
Method as above, described that amplitude limiting processing is made to the basic weak magnetoelectricity stream, the output result after amplitude limiting processing
It is defined as the target weak magnetoelectricity stream, specifically includes：
The basic weak magnetoelectricity stream is made comparisons with setting amplitude limit weak magnetoelectricity stream, if the basic weak magnetoelectricity stream is not less than institute
Setting amplitude limit weak magnetoelectricity stream is stated, the setting amplitude limit weak magnetoelectricity stream is defined as into the target weak magnetoelectricity stream；If described substantially weak
The basic weak magnetoelectricity stream is defined as the target weak magnetoelectricity stream by magnetoelectricity stream less than the setting amplitude limit weak magnetoelectricity stream.
Method as above, the known DC bus-bar voltage is adopted with the corresponding relation of the integral coefficient of processor
Following manner is obtained：
The a cycle of DC bus-bar voltage is divided into into continuous multiple subcycles, each subcycle is to there is a product
Divide the one-to-one corresponding relation of integral coefficient of coefficient, all subcycles in DC bus-bar voltage a cycle and processor
Form the corresponding relation of the DC bus-bar voltage and the integral coefficient of processor, and dc bus electricity in each described subcycle
The average of pressure amplitude value and one-to-one integral coefficient correlation；
Obtained and the current direct current according to the corresponding relation of known DC bus-bar voltage and the integral coefficient of processor
The corresponding integral coefficient of busbar voltage, as current integration coefficient, specifically includes：
Judge the subcycle in the affiliated DC bus-bar voltage a cycle of the current DC bus-bar voltage, work as described
Current subcycle corresponding to front DC bus-bar voltage；
Corresponded according to the integral coefficient of all subcycles in the DC bus-bar voltage a cycle and processor
Corresponding relation obtain the corresponding integral coefficient of the current subcycle, as the current integration coefficient.
To realize aforementioned invention purpose, the weak magnetic control device of the no electrolytic capacitor motor driven systems that the present invention is provided is adopted
Realized with following technical proposals：
A kind of weak magnetic control device of no electrolytic capacitor motor driven systems, described device includes：
DC bus-bar voltage acquiring unit, for obtaining the current DC bus-bar voltage in motor driven systems in real time；
Integral coefficient acquiring unit, for according to known DC bus-bar voltage pass corresponding with the integral coefficient of processor
System obtains integral coefficient corresponding with the current DC bus-bar voltage, used as current integration coefficient；The DC bus-bar voltage
It is proportionate with the amplitude that the corresponding relation of the integral coefficient of processor meets the DC bus-bar voltage and the integral coefficient
Relation；
Target weak magnetoelectricity stream acquiring unit, for according to the current DC bus-bar voltage, current goal voltage and described
Current integration coefficient obtains target weak magnetoelectricity stream；The current goal voltage determines according to current goal motor speed；
Weak magnetic control unit, for being controlled according to the weak magnetic of the target weak magnetoelectricity stream actuating motor drive system.
Device as above, the target weak magnetoelectricity stream acquiring unit is specifically included：
Difference obtains subelement, for obtaining the difference of the current DC bus-bar voltage and the current goal voltage；
Proportional integral processes subelement, for carrying out proportional integral process to the difference, obtains the target weak magnetic electricity
Stream；Integral coefficient during the proportional integral is processed is the current integration coefficient, the ratio system in the proportional integral process
Number is fixed coefficient.
Device as above, the proportional integral processes subelement and proportional integral process is carried out to the difference, obtains
Basic weak magnetoelectricity stream；The target weak magnetoelectricity stream acquiring unit also includes：
Amplitude limiting processing subelement, for making amplitude limiting processing to the basic weak magnetoelectricity stream, the output result after amplitude limiting processing
It is defined as the target weak magnetoelectricity stream.
Device as above, the amplitude limiting processing subelement makees amplitude limiting processing to the basic weak magnetoelectricity stream, at amplitude limit
Output result after reason is defined as the target weak magnetoelectricity stream, specifically includes：
The basic weak magnetoelectricity stream is made comparisons with setting amplitude limit weak magnetoelectricity stream, if the basic weak magnetoelectricity stream is not less than institute
Setting amplitude limit weak magnetoelectricity stream is stated, the setting amplitude limit weak magnetoelectricity stream is defined as into the target weak magnetoelectricity stream；If described substantially weak
The basic weak magnetoelectricity stream is defined as the target weak magnetoelectricity stream by magnetoelectricity stream less than the setting amplitude limit weak magnetoelectricity stream.
Device as above, the known DC bus-bar voltage is adopted with the corresponding relation of the integral coefficient of processor
Following manner is obtained：
The a cycle of DC bus-bar voltage is divided into into continuous multiple subcycles, each subcycle is to there is a product
Divide the one-to-one corresponding relation of integral coefficient of coefficient, all subcycles in DC bus-bar voltage a cycle and processor
Form the corresponding relation of the DC bus-bar voltage and the integral coefficient of processor, and dc bus electricity in each described subcycle
The average of pressure amplitude value and one-to-one integral coefficient correlation；
The integral coefficient acquiring unit is according to known DC bus-bar voltage pass corresponding with the integral coefficient of processor
System obtains integral coefficient corresponding with the current DC bus-bar voltage, as current integration coefficient, specifically includes：
Judge the subcycle in the affiliated DC bus-bar voltage a cycle of the current DC bus-bar voltage, work as described
Current subcycle corresponding to front DC bus-bar voltage；
Corresponded according to the integral coefficient of all subcycles in the DC bus-bar voltage a cycle and processor
Corresponding relation obtain the corresponding integral coefficient of the current subcycle, as the current integration coefficient.
On the other hand the purpose of the present invention there is provided a kind of no electrolytic capacitor motor with above-mentioned weak magnetic control device
Drive system and using the no electrolytic capacitor motor driven systems as driven compressor system air-conditioner.
Compared with prior art, advantages of the present invention and good effect are：Field weakening control method and control using the present invention
The no electrolytic capacitor motor driven systems of device processed, according to current DC bus-bar voltage select it is corresponding, follow dc bus
The integral coefficient of the change of voltage magnitude and positive correlation change, can be in direct current used as the processing parameter for determining target weak magnetoelectricity stream
Obtain when busbar voltage is high faster or deeper weak magnetic is controlled, reach the purpose for improving motor speed, solve electroless
Demand for control of the capacitor motor drive system to motor speed.
After the specific embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more clear
Chu.
Description of the drawings
Fig. 1 is based on the flow chart of no electrolytic capacitor motor driven systems field weakening control method one embodiment of the present invention；
Fig. 2 is based on the flow process of another embodiment of no electrolytic capacitor motor driven systems field weakening control method of the present invention
Figure；
Fig. 3 is the procedure chart of the target weak magnetoelectricity stream signal generation of Fig. 2 embodiments；
Fig. 4 is an oscillogram of a DC bus-bar voltage in Fig. 2 embodiments；
Fig. 5 is the oscillogram of weak magnetoelectricity stream Id and q shaft currents Iq obtained based on Fig. 2 embodiments；
Fig. 6 is based on the structural frames of no electrolytic capacitor motor driven systems weak magnetic control device one embodiment of the present invention
Figure；
Fig. 7 is the structural frames based on another embodiment of no electrolytic capacitor motor driven systems weak magnetic control device of the present invention
Figure.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below with reference to drawings and Examples,
The present invention is described in further detail.
Fig. 1 is referred to, the figure is shown based on no electrolytic capacitor motor driven systems field weakening control method one of the present invention
The flow chart of embodiment.
As schematically shown in Figure 1, the embodiment realizes the method for no electrolytic capacitor motor driven systems weak magnetic control including following
The process that step is constituted：
Step 11：The current DC bus-bar voltage in motor driven systems is obtained in real time.
DC bus-bar voltage is in motor driven systems after the rectified circuit rectifies of supply voltage, transmits to motor inversion
Busbar voltage before circuit, namely the voltage at thin-film electro perhaps ceramic condenser two ends.The detection of the voltage can adopt existing
Technology is not limited thereto realizing.
In the motor driven systems course of work, DC bus-bar voltage is detected in real time, obtain current dc bus
Voltage.
Step 12：Integral coefficient corresponding with current DC bus-bar voltage is obtained, as current integration coefficient.
After step 11 obtains current DC bus-bar voltage, according to DC bus-bar voltage and the integral coefficient of processor
Corresponding relation obtains integral coefficient corresponding with current DC bus-bar voltage, used as current integration coefficient.Wherein, dc bus electricity
Pressure is known and prestores with the corresponding relation of the integral coefficient of processor.And, to meet in corresponding relation：
The amplitude of DC bus-bar voltage and integral coefficient correlation.That is, the amplitude of DC bus-bar voltage is bigger, integral coefficient
It is bigger；Vice versa.
Step 13：Target weak magnetic electricity is obtained according to current DC bus-bar voltage, current goal voltage and current integration coefficient
Stream.
Current goal voltage is related to current goal motor speed, can be determined by target motor rotating speed.One
As for, be proportional to a value of target motor rotating speed.Current DC bus-bar voltage is obtained by step 11, current integration system
Number is obtained by step 12, then, based on current DC bus-bar voltage, current goal voltage and current integration coefficient target is obtained
Weak magnetoelectricity stream, namely the target d shaft current of motor.
Step 14：Controlled according to the weak magnetic of target weak magnetoelectricity stream actuating motor drive system.
The detailed process controlled based on weak magnetoelectricity stream execution weak magnetic is prior art, and here is not elaborated.
When no electrolytic capacitor motor driven systems being carried out with weak magnetic control using Fig. 1 embodiments, can be according to current direct current
Busbar voltage select change corresponding, that follow DC bus-bar voltage amplitude and the integral coefficient of positive correlation change as determination
The processing parameter of target weak magnetoelectricity stream, thus can, energy high in DC bus-bar voltage it is big when obtain faster or deeper
Weak magnetic is controlled, and reaches the purpose for improving motor speed as far as possible, solves no electrolytic capacitor motor driven systems to motor speed
Demand for control.
Fig. 2 is referred to, the figure show another based on no electrolytic capacitor motor driven systems field weakening control method of the present invention
The flow chart of individual embodiment.
As schematically shown in Figure 2, the embodiment realizes the method for no electrolytic capacitor motor driven systems weak magnetic control including following
The process that step is constituted：
Step 21：The current DC bus-bar voltage in motor driven systems is obtained in real time.
Step 22：Integral coefficient corresponding with current DC bus-bar voltage is obtained, as current integration coefficient.
Step 21 and step 22 implement the description that may be referred to step 11 and step 12 in Fig. 1 embodiments.
Step 23：Obtain the difference of current DC bus-bar voltage and current goal voltage.
Step 24：Proportional integral process is carried out to difference based on the corresponding processor of current integration coefficient, is obtained substantially weak
Magnetoelectricity stream.
Wherein, the integral coefficient during proportional integral is processed is the current integration coefficient obtained in step 22, and proportional integral
Proportionality coefficient in process is fixed coefficient.
Step 25：Amplitude limiting processing is made to basic weak magnetoelectricity stream, the output result after amplitude limiting processing is defined as target weak magnetic electricity
Stream.
The purpose for performing the step is that the basic weak magnetoelectricity stream obtained after comparative example Integral Processing is defined, it is to avoid weak magnetic
It is too deep and cause the unstable of motor driven systems.
Specifically, amplitude limiting processing is done using following manner：
Basic weak magnetoelectricity stream is made comparisons with setting amplitude limit weak magnetoelectricity stream, if basic weak magnetoelectricity stream is weak not less than setting amplitude limit
Magnetoelectricity stream, by setting amplitude limit weak magnetoelectricity stream target weak magnetoelectricity stream is defined as；If basic weak magnetoelectricity stream is less than set amplitude limit weak magnetic
Electric current, by basic weak magnetoelectricity stream target weak magnetoelectricity stream is defined as.The preset amount of setting amplitude limit weak magnetoelectricity stream is simultaneously stored.
Step 26：Controlled according to the weak magnetic of target weak magnetoelectricity stream actuating motor drive system.
As preferred embodiment, in the above-described embodiments, it is known that DC bus-bar voltage and processor integration system
Several corresponding relations is obtained using following manner：
The a cycle of DC bus-bar voltage is divided into into continuous multiple subcycles, each subcycle is to there is a product
Divide the one-to-one corresponding relation of integral coefficient of coefficient, all subcycles in DC bus-bar voltage a cycle and processor
Form the corresponding relation of the DC bus-bar voltage and the integral coefficient of processor, and DC bus-bar voltage width in each subcycle
The average of value and one-to-one integral coefficient correlation.
So, obtained and current direct current according to the corresponding relation of known DC bus-bar voltage and the integral coefficient of processor
The corresponding integral coefficient of busbar voltage, as current integration coefficient, specifically includes：
Judge the subcycle in the affiliated DC bus-bar voltage a cycle of current DC bus-bar voltage, it is female as current direct current
Current subcycle corresponding to line voltage；
Then, corresponded according to the integral coefficient of all subcycles in DC bus-bar voltage a cycle and processor
Corresponding relation obtain the corresponding integral coefficient of current subcycle, as current integration coefficient.
Specifically, for input supply voltage is the no electrolytic capacitor motor driven systems of 220V/50Hz, rectification circuit
The oscillogram of the DC bus-bar voltage after rectification as shown in figure 4, for frequency be 100Hz, the cycle for 10ms steamed bun waveform, frequency
It is changed into 2 times of input supply voltage, in each cycle, waveform is half sine wave, amplitude is first changed from small to big to crest, then from ripple
Peak starts from large to small.The a cycle of DC bus-bar voltage is divided into into continuous 10 subcycles, respectively subcycle 1,
Subcycle 2 ... ..., subcycle 10, a length of 1ms during each subcycle.Oscillogram based on DC bus-bar voltage understands, from sub- week
Phase 1 arrives subcycle 5, and the average of DC bus-bar voltage amplitude becomes larger in each subcycle；From subcycle 6 to subcycle 10,
The average of DC bus-bar voltage amplitude is tapered in each subcycle.Each subcycle to there is an integral coefficient, from son
Cycle 1 arrives subcycle 10, and corresponding integral coefficient is respectively 1,2,3,4,5,5,4,3,2,1.So, current direct current is being got
During busbar voltage, first determine whether current DC bus-bar voltage is which subcycle in the cycle, then, according to affiliated son
Cycle goes to get the integral coefficient corresponding to the subcycle, as current integration coefficient, to be integrated computing.Due to each
A length of 1ms during subcycle, equivalent to being modified to integral coefficient every 1ms.
Fig. 3 is shown based on the method life of the corresponding relation and Fig. 2 embodiments of above-mentioned DC bus-bar voltage and integral coefficient
Into the procedure chart of target weak magnetoelectricity stream signal.
As schematically shown in Figure 3, in the Fig. 3, difference calculator 31, ratio processor 32, n integral processor are included
331 to 33n (if n is 10, totally 10 integral processors), limiter 34, each integral processor is to there is 1 integral coefficient.
First, current DC bus-bar voltage V is obtainedm_limit, current DC bus-bar voltage is determined according to current DC bus-bar voltage
The affiliated subcycle in a cycle, for example, can be judged by the phase angle of voltage.Then, according to the subcycle
Corresponding integral coefficient determines corresponding integral processor.
Current DC bus-bar voltage V is calculated by difference calculator 31m_limitWith current goal voltageDifference,
Then, proportional integral process is carried out to difference based on the above-mentioned integral processor determined and ratio processor 32,
Export basic weak magnetoelectricity streamIn formula, KI_FWFor the proportionality coefficient of ratio processor 32,
It is fixed value in the embodiment.TnFor the integral coefficient for determining, n represents subcycle, if 10 subcycles, then n=1 ... 10.
In calculating process each time, n is determination value.For example, in corresponding relation as described, if current DC bus-bar voltage
Belong to the 3rd subcycle, then n=3, and Tn=T3=3.
Then, using the basic weak magnetoelectricity stream obtained after the comparative example Integral Processing of limiter 34Make amplitude limiting processing, obtain
Target weak magnetoelectricity stream Id*：
Wherein,To set amplitude limit weak magnetoelectricity stream.
Weak magnetoelectricity stream Id (namely target weak magnetoelectricity stream) obtained based on Fig. 2 embodiments such as Fig. 5 and the waveform of q shaft currents Iq
Figure is illustrated, and when q shaft currents are in peak value, d shaft currents are also at peak value.Therefore, when the value of supply voltage is higher, for example locate
In crest, driving force is big, is to improve the moment that motor speed obtains large energy.Now, weak magnetic depth is also relatively deep, then may be used
To improve motor speed as much as possible, rotating speed demand for control is met.
Fig. 6 is referred to, the figure is shown based on no electrolytic capacitor motor driven systems weak magnetic control device one of the present invention
The structured flowchart of embodiment.
As schematically shown in Figure 6, the embodiment realizes the knot that the device that no electrolytic capacitor motor driven systems weak magnetic is controlled includes
Structure unit, the function of each construction unit and annexation each other are as follows：
DC bus-bar voltage acquiring unit 61, for obtaining the current DC bus-bar voltage in motor driven systems in real time.
Integral coefficient acquiring unit 62, for corresponding with the integral coefficient of processor according to known DC bus-bar voltage
Relation acquisition integral coefficient corresponding with the current DC bus-bar voltage acquired in DC bus-bar voltage acquiring unit 61, as work as
Front integral coefficient.Wherein, the corresponding relation of the integral coefficient of DC bus-bar voltage and processor meets the width of DC bus-bar voltage
Value and integral coefficient correlation.
Target weak magnetoelectricity stream acquiring unit 63, the current direct current for being obtained according to DC bus-bar voltage acquiring unit 61 is female
Line voltage, current goal voltageAnd the current integration coefficient that integral coefficient acquiring unit 62 is obtained obtains target weak magnetoelectricity stream.
Wherein, current goal voltage determines according to current goal motor speed.
Weak magnetic control unit 64, performs for the target weak magnetoelectricity stream according to acquired in target weak magnetoelectricity stream acquiring unit 63
The weak magnetic control of motor driven systems.
Each unit operation corresponding software program in the embodiment control device, it is right to realize according to the method for Fig. 1 embodiments
The weak magnetic control of no electrolytic capacitor motor driven systems.
Fig. 7 is referred to, the figure show another based on no electrolytic capacitor motor driven systems weak magnetic control device of the present invention
The structured flowchart of individual embodiment.
As schematically shown in Figure 7, the embodiment realizes the knot that the device that no electrolytic capacitor motor driven systems weak magnetic is controlled includes
Structure unit, the function of each construction unit and annexation each other are as follows：
DC bus-bar voltage acquiring unit 71, for obtaining the current DC bus-bar voltage in motor driven systems in real time.
Integral coefficient acquiring unit 72, for corresponding with the integral coefficient of processor according to known DC bus-bar voltage
Relation acquisition integral coefficient corresponding with the current DC bus-bar voltage acquired in DC bus-bar voltage acquiring unit 71, as work as
Front integral coefficient.Wherein, the corresponding relation of the integral coefficient of DC bus-bar voltage and processor meets the width of DC bus-bar voltage
Value and integral coefficient correlation.
Target weak magnetoelectricity stream acquiring unit 73, the current direct current for being obtained according to DC bus-bar voltage acquiring unit 61 is female
Line voltage, current goal voltageAnd the current integration coefficient that integral coefficient acquiring unit 62 is obtained obtains target weak magnetoelectricity stream.
Wherein, current goal voltage determines according to current goal motor speed.
Wherein, the concrete structure of target weak magnetoelectricity stream acquiring unit 73 is to include：
Difference obtains subelement 731, for obtaining the current dc bus acquired in DC bus-bar voltage acquiring unit 71
Voltage and current goal voltageDifference.
Proportional integral processes subelement 732, carries out at proportional integral for obtaining the difference that subelement 731 is obtained to difference
Reason, obtains basic weak magnetoelectricity stream.Wherein, the integral coefficient during proportional integral is processed is working as the acquisition of integral coefficient acquiring unit 72
Front integral coefficient, and the proportionality coefficient during proportional integral is processed is preferably fixed coefficient.
Amplitude limiting processing subelement 733, the basic weak magnetoelectricity stream obtained for comparative example Integral Processing subelement 732 makees amplitude limit
Process, the output result after amplitude limiting processing is defined as target weak magnetoelectricity stream.
Weak magnetic control unit 74, performs for the target weak magnetoelectricity stream according to acquired in target weak magnetoelectricity stream acquiring unit 73
The weak magnetic control of motor driven systems.
Each unit operation corresponding software program in the embodiment control device, it is right to realize according to the method for Fig. 2 embodiments
The weak magnetic control of no electrolytic capacitor motor driven systems.
The weak magnetic control device of above-described embodiment may apply in no electrolytic capacitor motor driven systems, meet to without electricity
The motor speed demand for control of solution capacitor motor drive system.And there is the electroless electricity of the weak magnetic control device of above-described embodiment
Holding motor driven systems can be as cooler compressor drive system, with low cost, the driven compressor system reality of small size
The converting operation control of existing air-conditioner.
Above example is only illustrating technical scheme, rather than is limited；Although with reference to aforementioned reality
Apply example to be described in detail the present invention, for the person of ordinary skill of the art, still can be to aforementioned enforcement
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging claimed technical solution of the invention of appropriate technical solution.
Claims (12)
1. a kind of field weakening control method of no electrolytic capacitor motor driven systems, it is characterised in that methods described includes：
The current DC bus-bar voltage in motor driven systems is obtained in real time；
Obtained and the current dc bus according to the corresponding relation of known DC bus-bar voltage and the integral coefficient of processor
The corresponding integral coefficient of voltage, as current integration coefficient；The DC bus-bar voltage is corresponding with the integral coefficient of processor
Relation meets the amplitude and the integral coefficient correlation of the DC bus-bar voltage；
Target weak magnetoelectricity stream is obtained according to the current DC bus-bar voltage, current goal voltage and the current integration coefficient；
The current goal voltage determines according to current goal motor speed；
Controlled according to the weak magnetic of the target weak magnetoelectricity stream actuating motor drive system.
2. method according to claim 1, it is characterised in that described according to the current DC bus-bar voltage, current mesh
Mark voltage and the current integration coefficient obtain target weak magnetoelectricity stream, specifically include：
The difference of the current DC bus-bar voltage and current goal voltage is obtained, based on the corresponding place of the current integration coefficient
Reason device carries out proportional integral process to the difference, obtains the target weak magnetoelectricity stream；Integration in the proportional integral process
Coefficient is the current integration coefficient, and the proportionality coefficient during the proportional integral is processed is fixed coefficient.
3. method according to claim 2, it is characterised in that the acquisition current DC bus-bar voltage and current mesh
The difference of mark voltage, based on the corresponding processor of the current integration coefficient proportional integral process is carried out to the difference, is obtained
The target weak magnetoelectricity stream, specifically also includes：
The difference of the current DC bus-bar voltage and current goal voltage is obtained, based on the corresponding place of the current integration coefficient
Reason device carries out proportional integral process to the difference, obtains basic weak magnetoelectricity stream, and to the basic weak magnetoelectricity stream amplitude limiting processing is made,
Output result after amplitude limiting processing is defined as the target weak magnetoelectricity stream.
4. method according to claim 3, it is characterised in that described that amplitude limiting processing is made to the basic weak magnetoelectricity stream, limit
Output result after width process is defined as the target weak magnetoelectricity stream, specifically includes：
The basic weak magnetoelectricity stream is made comparisons with setting amplitude limit weak magnetoelectricity stream, if the basic weak magnetoelectricity stream sets not less than described
Fixed limit width weak magnetoelectricity stream, by the setting amplitude limit weak magnetoelectricity stream target weak magnetoelectricity stream is defined as；If the basic weak magnetic electricity
The basic weak magnetoelectricity stream is defined as the target weak magnetoelectricity stream by stream less than the setting amplitude limit weak magnetoelectricity stream.
5. method according to any one of claim 1 to 4, it is characterised in that the known DC bus-bar voltage with
The corresponding relation of the integral coefficient of processor is obtained using following manner：
The a cycle of DC bus-bar voltage is divided into into continuous multiple subcycles, each subcycle is to there is an integration system
Number, all subcycles in DC bus-bar voltage a cycle are formed with the one-to-one corresponding relation of the integral coefficient of processor
The corresponding relation of the integral coefficient of the DC bus-bar voltage and processor, and DC bus-bar voltage width in each described subcycle
The average of value and one-to-one integral coefficient correlation；
Obtained and the current dc bus according to the corresponding relation of known DC bus-bar voltage and the integral coefficient of processor
The corresponding integral coefficient of voltage, as current integration coefficient, specifically includes：
The subcycle in the affiliated DC bus-bar voltage a cycle of the current DC bus-bar voltage is judged, as described current straight
Current subcycle corresponding to stream busbar voltage；
It is right correspondingly with the integral coefficient of processor according to all subcycles in the DC bus-bar voltage a cycle
The corresponding integral coefficient of current subcycle described in Relation acquisition is answered, as the current integration coefficient.
6. a kind of weak magnetic control device of no electrolytic capacitor motor driven systems, it is characterised in that described device includes：
DC bus-bar voltage acquiring unit, for obtaining the current DC bus-bar voltage in motor driven systems in real time；
Integral coefficient acquiring unit, for being obtained with the corresponding relation of the integral coefficient of processor according to known DC bus-bar voltage
Integral coefficient corresponding with the current DC bus-bar voltage is taken, as current integration coefficient；The DC bus-bar voltage and place
The corresponding relation of the integral coefficient of reason device meets the amplitude and the integral coefficient correlation of the DC bus-bar voltage；
Target weak magnetoelectricity stream acquiring unit, for according to the current DC bus-bar voltage, current goal voltage and described current
Integral coefficient obtains target weak magnetoelectricity stream；The current goal voltage determines according to current goal motor speed；
Weak magnetic control unit, for being controlled according to the weak magnetic of the target weak magnetoelectricity stream actuating motor drive system.
7. device according to claim 6, it is characterised in that the target weak magnetoelectricity stream acquiring unit is specifically included：
Difference obtains subelement, for obtaining the difference of the current DC bus-bar voltage and the current goal voltage；
Proportional integral processes subelement, for carrying out proportional integral process to the difference, obtains the target weak magnetoelectricity stream；Institute
It is the current integration coefficient to state the integral coefficient during proportional integral is processed, and the proportionality coefficient during the proportional integral is processed is solid
Determine coefficient.
8. device according to claim 7, it is characterised in that the proportional integral processes subelement and carries out to the difference
Proportional integral process, obtains basic weak magnetoelectricity stream；The target weak magnetoelectricity stream acquiring unit also includes：
Amplitude limiting processing subelement, for making amplitude limiting processing to the basic weak magnetoelectricity stream, the output result after amplitude limiting processing determines
For the target weak magnetoelectricity stream.
9. device according to claim 8, it is characterised in that the amplitude limiting processing subelement is to the basic weak magnetoelectricity stream
Make amplitude limiting processing, the output result after amplitude limiting processing is defined as the target weak magnetoelectricity stream, specifically includes：
The basic weak magnetoelectricity stream is made comparisons with setting amplitude limit weak magnetoelectricity stream, if the basic weak magnetoelectricity stream sets not less than described
Fixed limit width weak magnetoelectricity stream, by the setting amplitude limit weak magnetoelectricity stream target weak magnetoelectricity stream is defined as；If the basic weak magnetic electricity
The basic weak magnetoelectricity stream is defined as the target weak magnetoelectricity stream by stream less than the setting amplitude limit weak magnetoelectricity stream.
10. the device according to any one of claim 6 to 9, it is characterised in that the known DC bus-bar voltage with
The corresponding relation of the integral coefficient of processor is obtained using following manner：
The a cycle of DC bus-bar voltage is divided into into continuous multiple subcycles, each subcycle is to there is an integration system
Number, all subcycles in DC bus-bar voltage a cycle are formed with the one-to-one corresponding relation of the integral coefficient of processor
The corresponding relation of the integral coefficient of the DC bus-bar voltage and processor, and DC bus-bar voltage width in each described subcycle
The average of value and one-to-one integral coefficient correlation；
The integral coefficient acquiring unit is obtained according to known DC bus-bar voltage with the corresponding relation of the integral coefficient of processor
Integral coefficient corresponding with the current DC bus-bar voltage is taken, as current integration coefficient, is specifically included：
The subcycle in the affiliated DC bus-bar voltage a cycle of the current DC bus-bar voltage is judged, as described current straight
Current subcycle corresponding to stream busbar voltage；
It is right correspondingly with the integral coefficient of processor according to all subcycles in the DC bus-bar voltage a cycle
The corresponding integral coefficient of current subcycle described in Relation acquisition is answered, as the current integration coefficient.
11. a kind of no electrolytic capacitor motor driven systems, it is characterised in that include any one of the claims 6 to 10
The weak magnetic control device of described no electrolytic capacitor motor driven systems.
A kind of 12. air-conditioners, include driven compressor system, it is characterised in that the driven compressor system is using above-mentioned
No electrolytic capacitor motor driven systems described in claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610899820.8A CN106655953B (en) | 2016-10-15 | 2016-10-15 | No electrolytic capacitor motor driven systems and its field weakening control method and control device |
| PCT/CN2016/110899 WO2018068390A1 (en) | 2016-10-15 | 2016-12-20 | Electric motor driving system with no electrolytic capacitor, and field weakening control method and control apparatus thereof |
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| CN201610899820.8A CN106655953B (en) | 2016-10-15 | 2016-10-15 | No electrolytic capacitor motor driven systems and its field weakening control method and control device |
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| CN110904615A (en) * | 2019-12-02 | 2020-03-24 | 江苏新安电器股份有限公司 | Brushless direct current motor control method and system for washing machine |
| CN112564563A (en) * | 2019-09-25 | 2021-03-26 | 杭州先途电子有限公司 | Control method, control device and controller |
| CN112787495A (en) * | 2019-11-07 | 2021-05-11 | 广东美芝制冷设备有限公司 | Variable frequency controller and control method thereof, variable frequency electric appliance and electronic equipment |
| WO2023097915A1 (en) * | 2021-12-03 | 2023-06-08 | 淮安威灵电机制造有限公司 | Field weakening control method and apparatus for motor, motor controller, and motor control system |
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| Publication number | Publication date |
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| CN106655953B (en) | 2019-07-23 |
| WO2018068390A1 (en) | 2018-04-19 |
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