CN110061679A - A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load - Google Patents
A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load Download PDFInfo
- Publication number
- CN110061679A CN110061679A CN201910470701.4A CN201910470701A CN110061679A CN 110061679 A CN110061679 A CN 110061679A CN 201910470701 A CN201910470701 A CN 201910470701A CN 110061679 A CN110061679 A CN 110061679A
- Authority
- CN
- China
- Prior art keywords
- circuit
- speed
- value
- fuzzy
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
-
- 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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/01—Asynchronous machines
Abstract
The present invention provides a kind of Intelligent frequency conversion speed adjusting devices suitable for pulse-type load, which is characterized in that the input of Intelligent frequency conversion speed adjusting device is single-phase alternating current, and output is frequency and the adjustable three-phase alternating current of voltage；And the hardware circuit of Intelligent frequency conversion speed adjusting device is made of main circuit and control circuit；The present invention also provides a kind of control methods of Intelligent frequency conversion speed adjusting device suitable for pulse-type load, which is characterized in that control method is to control hardware circuit by software algorithm to realize；And software algorithm is made of main program and subprogram.The beneficial effects of the present invention are: Intelligent frequency conversion speed adjusting device provided by the invention can be realized continuous frequency conversion, revolving speed smooth change, stability is good, production cost is low, cost performance is high, and control method provided by the invention can be promoted for the civilian household electrical appliances containing threephase asynchronous, it is possible to reduce the production cost of household electrical appliance has wide commercial promise.
Description
Technical field
The invention belongs to threephase asynchronous speed regulating control technical fields, and in particular to one kind is suitable for pulse-type load
Intelligent frequency conversion speed adjusting device and its control method.
Background technique
With the development of science and technology, motor using more and more extensive, diversified hair is also presented in the load form of use
Exhibition, wherein a kind of critically important form is pulse-type load form, for example, being widely present in the fitness equipments such as treadmill
Pulse-type load.
Pulse-type load in treadmill refers to that the load torque that user generates when running or walking turns for pulse-type load
Square is mainly described according to three frequency of pulse-type load torque, duty ratio and load torque amplitude parameters.
The operation characteristic with normal load of motor are very different under pulse-type load: conventional load is only in start and stop
Single-impact can be caused to motor, and pulse-type load not only causes to impact in start and stop to variable-frequency speed-regulating controller, Er Qie
The loading and unloading that can be also formed to motor repeatedly when operating normally load sudden change acts on, and voltage, electric current is caused substantially frequently to become
Change, and then influences the output characteristics of controller.So biggish electric current can be generated when pulse-type load acts on motor
Pulsation and voltage fluctuation to motor even running, guarantee that user itself and property safety bring challenges.
The prior art controls the threephase asynchronous speed regulating control in the case where pulse-type load disturbs using PID
Method processed, but PID control is for the lance between contradiction, tracking fixed valure and the disturbance suppression between static and dynamic property
Contradiction etc. between shield, robustness and control performance does not well solve scheme, and the parameter of PID controller is once adjusted
It is good just to immobilize, it is difficult to ensure that system has good Control platform before and after load variation.It can be gone out based on PID control method
Existing motor output rotary speed unstabilization, the problems such as fluctuation is big, so its inadaptable demand controlled pulse-type load, Ke Yitong
It crosses using control theory more more advanced than traditional PID control and solves problem above.
Universal frequency converter currently on the market, it is most of to use variable voltage variable frequency control mode, to various of different nature negative
It carries indifference to treat, some functions are more, but price is high, and speed adjusting performance and particular demands mismatch, and the ratio of performance to price is not high.Base
There are four types of this Frequency Conversion and Speed Regulation Techniques: constant voltage constant frequency control, speed closed loop slip frequency controlled, vector controlled and directly turning
Square control；In recent years with the development of high dynamic performance control technology, senseless control, flux observation skill are developed
The control technologies such as art, the intelligent control of motor and parameter identification.Currently, being had also been introduced more in Frequency Conversion and Speed Regulation Technique field
Advanced control theory, including fuzzy control, ANN Control, self adaptive control, modified feedback linearization control, sliding moding structure
Control, Active Disturbance Rejection Control, the exact linearization control based on Differential Geometry and control and artificial intelligence based on genetic algorithm
Deng.
Summary of the invention
In order to make up for the deficiencies of the prior art, threephase asynchronous acceleration/deceleration under pulse-type load disturbance is realized
The continual and steady operation in stage, steady-state process, the present invention provides a kind of intelligent frequency-conversions suitable for pulse-type load to adjust the speed dress
It sets and its control method.Both people be able to satisfy, diversified demand is controlled for AC speed regulating, it also can be in application of frequency converter field
Certain commercial value is embodied with the characteristics of high performance-price ratio.
The present invention provides a kind of Intelligent frequency conversion speed adjusting devices suitable for pulse-type load, and input is single phase ac
Electricity, output are electric voltage frequency and the adjustable three-phase alternating current of amplitude；And the hardware circuit of aforementioned intelligent frequency converter is by leading
Circuit and control circuit composition, wherein aforementioned main circuit includes current rectifying and wave filtering circuit, inverter circuit, aforementioned control circuit includes master
Control chip circuit, key and display circuit, direct current signal detection circuit, alternating current signal detection circuit, Rotating speed measring circuit, isolation
With SPWM driving circuit, auxiliary power circuit, work light circuit, relay drive circuit；
Aforementioned rectification circuit is worked by rectification module, and aforementioned filter circuit is by two filter capacitor parallel connection works
Make；And current-limiting resistance is connected between aforementioned rectification module and aforementioned filter capacitor, it is driven on aforementioned current-limiting resistance configured with circuit
Motor type relay；Aforementioned inverter circuit is worked by intelligent power module；The function of aforementioned main control chip circuit is basis
The key command received, the feedback signal of direct current signal detection circuit, alternating current signal detection circuit, Rotating speed measring circuit, does
Logic judgment out, output control the SPWM control signal that IGBT is turned on and off in aforementioned inverter circuit；Aforementioned main control chip electricity
Road is worked by main control chip；Aforementioned main control chip selects STM32F103ZET6 microprocessor；
Aforementioned keys and the function of display circuit are that signal is received by key, and signal is defeated in the form of key command
Main control chip circuit is given out, and main control chip is exported signal to display module by display circuit；Aforementioned keys and display circuit
It is by three key modules and display module come work, aforementioned three key modules respectively correspond acceleration, deceleration and start and stop
Instruction, display module select 12864 LCD MODULEs；
The function of aforementioned direct current signal detection circuit is to acquire DC voltage, current signal, anti-with voltage after operation amplifier
The form of feedback signal, which exports, gives main control chip circuit；The function of aforementioned alternating current signal detection circuit is fixed to threephase asynchronous
Electron current is sampled, and is adjusted to 0V to 3.3V voltage signal, is exported in the form of voltage feedback signal and give main control chip circuit；
Aforementioned alternating current signal detection circuit is worked by sampling resistor and bidirectional current detection module AD8210；
The function of aforementioned Rotating speed measring circuit is the pulse signal for acquiring photoelectric encoder output, amplify by triode,
After capacitor and photoelectrical coupler shaping and isolation, is exported in the form of speed feedback signal and give main control chip circuit；Aforementioned isolation
It is by isolation module and SPWM drive circuit works with SPWM driving circuit, aforementioned SPWM driving circuit uses load capacity
Strong pull-up resistor form；
The function of aforementioned auxiliary power circuit is to reduce city for the voltage of 220V single-phase alternating current, to meet different circuits pair
The requirement of voltage；The function of foregoing work indicator light circuit is instruction circuit working state, is by red LED lamp driving circuit
Work.
The present invention also provides a kind of control methods of Intelligent frequency conversion speed adjusting device suitable for pulse-type load, are to pass through
Software algorithm controls what aforementioned hardware circuit was realized；And aforementioned software algorithm is made of main program and subprogram, wherein aforementioned master
Program is system initialization function, aforementioned subprogram include SPWM generate program, Rotating speed measring program, analog-to-digital conversion ADC program,
Key and display program, feedback calculation procedure；
Aforementioned main program: initializing each program function, subsequently into System self-test, if aforementioned system self-test knot
Fruit is not pass through, then returns to upper level and initialize again to foregoing routine function, carry out System self-test again later；If being
System self-detection result is to pass through, then bring into operation each subprogram, until whole the end of the programs；
Aforementioned SPWM generates program: exporting 6 road SPWM waves using aforementioned timer, configures the control of SPWM wave by look-up table
The duty ratio of signal, and phase sequence fitting is carried out, so that the Three-phase alternating current signal of aforementioned inverter circuit output is differed 120 degree；
Aforementioned Rotating speed measring program: it using the input capture function of aforementioned timer, is caught in I/O port detection photoelectric encoder
The high level lasting time of the monophasic pulses if signal obtained, if aforementioned high level lasting time is too short or affiliated single-phase arteries and veins is not detected
Signal is rushed, then regards as system failure, stops the output of SPWM wave；
Aforementioned analog-to-digital conversion ADC program: the Voltage Feedback of direct current signal detection circuit and alternating current signal detection circuit is believed
It number is input to main control chip, aforementioned main control chip carries out analog-to-digital conversion to voltage value, if the deviation between setting value is larger,
Stop the output of SPWM wave；
Aforementioned keys and display program: start and stop and feed speed control are carried out by key, and are turned by key module setting
Fast setting value passes through display module real-time display motor status amount；
Feed back calculation procedure: by speed feedback signal, direct current signal detection circuit feedback signal, alternating current signal detection circuit
Feedback signal is compared with setting value respectively, according to comparison result using fuzzy frequency controller/current amplitude PI controller
Fuzzy/two sections of the PI control algolithm combined refreshes SPWM wave pulse signal.
As a preferred solution, aforementioned fuzzy/two sections of control algolithms of PI refer to: when speed error value is not zero,
Main control chip first determines whether that the order of plus/minus speed or the revolving speed caused by steady-state process is due to disturbance change；If plus/minus is fast
Order then obscures frequency control and plays a leading role, and aforementioned fuzzy frequency control is executed by fuzzy frequency controller；If steady
The state stage changes due to revolving speed caused by disturbing, then current amplitude PI control plays a leading role, and aforementioned current magnitude PI is controlled
It is executed by current amplitude PI controller；Aforementioned speed error value refers to the difference of speed setting value and speed feedback signal；
The course of work of aforementioned fuzzy frequency controller are as follows: using speed error value, speed setting value as fuzzy frequency control
The input of device processed, fuzzy frequency controller aforementioned later is successively blurred, fuzzy logic inference conciliates fuzzification process, most
The slip frequency value of output control motor rotor speed eventually；Wherein, the input value of aforementioned blurring is speed error value and revolving speed
Setting value, output valve are that the fuzzy language value of speed error value, the fuzzy language value of speed setting value, speed error value are subordinate to
The degree of membership of degree, speed setting value；The input value of aforementioned fuzzy logic inference is the output valve of aforementioned blurring, and output valve is to turn
The fuzzy language value of difference frequency value and the degree of membership of slip frequency value；The input value of aforementioned defuzzification is aforementioned fuzzy reasoning
Output valve, output valve are the exact values of slip frequency；
Aforementioned current magnitude PI controller includes the subtracter of calculating speed error, PI module, clipping module, worked
Journey are as follows: when receiving plus/minus speed order, speed error value is larger, and PI module has biggish output valve, at this moment needs through clipping mould
The effect of block guarantees that motor input current amplitude remains unchanged；In steady-state process, speed error value is smaller, the output of PI module
Value is smaller than the limit value of clipping module, then revolving speed is controlled by inverter current amplitude.
It is further preferred that aforementioned SPWM, which generates program, is provided with dead time, the same bridge arm of aforementioned inverter circuit is prevented
Upper and lower two IGBT are opened burn out aforementioned intelligent power module simultaneously.
A kind of Intelligent frequency conversion speed adjusting device suitable for pulse-type load above-mentioned is for the change to threephase asynchronous
Voltage variable frequency speed regulating.
A kind of control method of Intelligent frequency conversion speed adjusting device suitable for pulse-type load above-mentioned is used for phase asynchronous
The VVVF speed regulation of motor.
The beneficial effects of the present invention are: a kind of intelligent frequency-conversion speed regulation dress suitable for pulse-type load provided by the invention
It sets and its control method has the advantage that
1. the frequency-tuning range of Intelligent frequency conversion speed adjusting device provided by the invention is in 2Hz to 60Hz, the company of can be realized
Continuous frequency conversion, revolving speed smooth change；
2. Intelligent frequency conversion speed adjusting device stability provided by the invention is good, practical to turn in threephase asynchronous zero load
Speed relative to given rotating speed error less than 3%, by zero load to load when, static difference rate is less than 5%；
3. acceleration/deceleration stage response may be implemented in Intelligent frequency conversion speed adjusting device provided by the invention and its control method
Between be less than 2s；
4. Intelligent frequency conversion speed adjusting device provided by the invention is applied widely, it can be used for three of rated power within 3kw
Phase Asynchronous Motor Driving, is applicable not only to pulse-type load, is also applied for other loads with fluctuation property；
5. the production cost of Intelligent frequency conversion speed adjusting device provided by the invention is low, cost performance is high, and cost of manufacture is about 200
Member or so；
6. Intelligent frequency conversion speed adjusting device provided by the invention is small in size, metal shell volume is 16cm*14cm*15cm, section
Save accommodation space；
7. Intelligent frequency conversion speed adjusting device provided by the invention and its control method can by by the start and stop of key control motor,
Accelerate and slow down, display module can show real-time revolving speed, DC voltage and electric current etc.；
8. Intelligent frequency conversion speed adjusting device provided by the invention and its control method realize automatic control and adjustment, setting speed
Afterwards, main control chip exports sinusoidal pulse width modulation wave appropriate, control inverter module output by feedback detection and logic judgment
Corresponding three-phase alternating current is to threephase asynchronous；
9. Intelligent frequency conversion speed adjusting device provided by the invention and its control method can be promoted for containing three-phase asynchronous electric
Civilian household electrical appliances, such as washing machine, air-conditioning, treadmill of machine etc., since cost is relatively low for the speed setting controller, it is possible to reduce household
The production cost of electric appliance has wide commercial promise.
Detailed description of the invention
Fig. 1 is a kind of hardware circuit frame of Intelligent frequency conversion speed adjusting device suitable for pulse-type load of the invention
Figure；
Fig. 2 is that a kind of software of the control method of Intelligent frequency conversion speed adjusting device suitable for pulse-type load of the invention is calculated
Method structural block diagram；
Fig. 3 is a kind of mould suitable for the control method of the Intelligent frequency conversion speed adjusting device of pulse-type load of the invention
The structural block diagram of two sections of control algolithms of paste/PI；
Fig. 4 is a kind of obscuring suitable for the control method of the Intelligent frequency conversion speed adjusting device of pulse-type load of the invention
The structure composition and course of work schematic diagram of frequency controller；
Fig. 5 is a kind of electric current suitable for the control method of the Intelligent frequency conversion speed adjusting device of pulse-type load of the invention
The structure composition and course of work schematic diagram of amplitude PI controller；
Fig. 6 be a kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load of the invention for pair
The schematic diagram of the VVVF speed regulation process of threephase asynchronous；
Fig. 7 be a kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load of the invention for pair
The rotational speed regulation flow chart of threephase asynchronous.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, to the technology in the embodiment of the present invention
Scheme is clearly and completely described, it is clear that and described embodiments are some of the embodiments of the present invention, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
1. a kind of Intelligent frequency conversion speed adjusting device suitable for pulse load
The input of the device is single-phase alternating current, and output is frequency and the adjustable three-phase alternating current of voltage；And intelligent frequency-conversion
The hardware circuit of speed regulation device is made of main circuit and control circuit, is specifically shown in Fig. 1, and wherein main circuit includes rectifying and wave-filtering electricity
Road, inverter circuit, control circuit include main control chip circuit, key and display circuit, direct current signal detection circuit, AC signal
Detection circuit, Rotating speed measring circuit, isolation and SPWM driving circuit, auxiliary power circuit, work light circuit, relay drive
Dynamic circuit；
Wherein rectification circuit is worked by rectification module, and filter circuit is by two filter capacitor parallel operations
's；And current-limiting resistance is connected between rectification module and filter capacitor, circuit drives relay, inversion electricity are configured on current-limiting resistance
Road is worked by intelligent power module (IPM), and the function of main control chip circuit is according to the key command received, direct current
The feedback signal of signal deteching circuit, alternating current signal detection circuit, Rotating speed measring circuit, makes logic judgment, and output control is inverse
The SPWM that IGBT is turned on and off in power transformation road controls signal；Main control chip circuit is worked by main control chip；Master control core
Piece selects STM32F103ZET6 microprocessor, the function of key and display circuit be signal is received by key, and by signal with
The form of key command, which exports, gives main control chip circuit, and main control chip is exported signal to display module by display circuit；It presses
Key and display circuit are by three key modules and display module come work, and three key modules respectively correspond acceleration, subtract
Speed and start and stop instruction, display module select 12864 LCD MODULEs；The function of direct current signal detection circuit is acquisition direct current
It presses, current signal, is exported in the form of voltage feedback signal after operation amplifier and give main control chip circuit；Direct current signal includes direct current
Voltage signal and DC current signal, d. c. voltage signal are derived from both ends of filter capacitor, and DC current signal is derived from IPM negative terminal；
D. c. voltage signal and DC current signal are acquired by resistance sampling method, input main control chip after operational amplifier amplification.
Ac current signal be threephase asynchronous stator current is sampled by alternating current signal detection circuit, circuit after testing
It is adjusted to voltage signal, is exported in the form of voltage feedback signal to main control chip；Alternating current signal detection circuit is to pass through sampling
What resistance and bidirectional current detection module AD8210 worked；
Speed feedback signal is to be put by the pulse signal of Rotating speed measring circuit acquisition photoelectric encoder output by triode
Greatly, it after capacitor and photoelectrical coupler filter and be isolated, exports to main control chip；Isolation and SPWM driving circuit are to pass through isolation mode
Block and SPWM drive circuit works, the SPWM driving circuit pull-up resistor form strong using load capacity；Auxiliary power circuit
Function be reduce city for 220V single-phase alternating current voltage, to meet requirement of the different circuits to voltage；Work light electricity
The function on road is instruction circuit working state, is by red LED lamp drive circuit works.
2. a kind of control method of the Intelligent frequency conversion speed adjusting device suitable for pulse-type load
The control method is to control the hardware circuit by software algorithm to realize；And the software algorithm is by main journey
Sequence and subprogram composition, are specifically shown in Fig. 2, wherein the main program is system initialization function, the subprogram includes SPWM raw
At program, Rotating speed measring program, analog-to-digital conversion ADC program, key and display program, feedback calculation procedure；
The main program: initializing each program function, subsequently into System self-test, if the System self-test knot
Fruit is not pass through, then returns to upper level and initialize again to described program function, carry out System self-test again later；If being
System self-detection result is to pass through, then bring into operation each subprogram, until whole the end of the programs；
The SPWM generates program: exporting 6 road SPWM waves using the timer, configures the control of SPWM wave by look-up table
The duty ratio of signal, and phase sequence fitting is carried out, so that the Three-phase alternating current signal of the inverter circuit output is differed 120 degree；
The Rotating speed measring program: it using the input capture function of the timer, is caught in I/O port detection photoelectric encoder
The high level lasting time of the monophasic pulses if signal obtained, if the high level lasting time is too short or affiliated single-phase arteries and veins is not detected
Signal is rushed, then regards as system failure, stops the output of SPWM wave；
The analog-to-digital conversion ADC program: the Voltage Feedback of direct current signal detection circuit and alternating current signal detection circuit is believed
It number is input to main control chip, the main control chip carries out analog-to-digital conversion to voltage value, if the deviation between setting value is larger,
Stop the output of SPWM wave；
The key and display program: start and stop and feed speed control are carried out by key, and are turned by key module setting
Fast setting value passes through display module real-time display motor status amount；
Feed back calculation procedure: by speed feedback signal, direct current signal detection circuit feedback signal, alternating current signal detection circuit
Feedback signal is compared with setting value respectively, according to comparison result using fuzzy frequency controller/current amplitude PI controller
Fuzzy/two sections of the PI control algolithm combined refreshes SPWM wave pulse signal；
Described fuzzy/two sections of control algolithms (as shown in Figure 3) of PI refer to: when speed error value is not zero, main control chip
First determine whether that the order of plus/minus speed or the revolving speed caused by steady-state process is due to disturbance change；If plus/minus speed order, then
Fuzzy frequency control plays a leading role, and the fuzzy frequency control is executed by fuzzy frequency controller；If in steady-state process
Due to revolving speed change caused by disturbing, then current amplitude PI control plays a leading role, and current amplitude PI control is by electric current
Amplitude PI controller executes；The speed error value refers to the difference of speed setting value and speed feedback signal；
The course of work of the fuzzy frequency controller be (as shown in Figure 4): using speed error value, speed setting value as
The input of fuzzy frequency controller, the fuzzy frequency controller described later is successively blurred, fuzzy logic inference conciliates mould
Gelatinization process, final output control the slip frequency value of motor rotor speed；Wherein, the input value of the blurring is that revolving speed misses
Difference and speed setting value, output valve are the fuzzy language value of speed error value, the fuzzy language value of speed setting value, revolving speed mistake
Degree of membership, the degree of membership of speed setting value of difference；The input value of the fuzzy logic inference is the output valve of the blurring,
Output valve is the fuzzy language value of slip frequency value and the degree of membership of slip frequency value；The input value of the defuzzification is described
The output valve of fuzzy reasoning, output valve are the exact values of slip frequency；
The current amplitude PI controller includes the subtracter of calculating speed error, PI module, clipping module, worked
Journey is (as shown in Figure 5): when receiving plus/minus speed order, speed error value is larger, and PI module has biggish output valve, at this moment needs
To guarantee that motor input current amplitude remains unchanged by the effect of clipping module；In steady-state process, speed error value is smaller,
The output valve of PI module is smaller than the limit value of clipping module, then revolving speed is controlled by inverter current amplitude.
3. a kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load is used for impulse type
The intelligent frequency-conversion of the threephase asynchronous of load adjusts the speed
A kind of Intelligent frequency conversion speed adjusting device suitable for pulse-type load of the invention is supplied using single phase ac 220V power supply
Electricity, output three-phase alternating current to threephase asynchronous, threephase asynchronous have pulse-type load, Hall current sensor
Collected signal is sent into control circuit with photoelectric encoder, control circuit generates corresponding SPWM wave signal and removes control main circuit
In inverter module export corresponding three-phase alternating current, referring to Fig. 6.Specific work process are as follows: after device powers on, work refers to
Show that lamp lights, meanwhile, main program brings into operation, and each program function is initialized, and relay is closed after two seconds, current-limiting resistance quilt
Start button is pressed in short circuit, and threephase asynchronous is run with initial speed, and motor acceleration and deceleration and stopping are respectively by accordingly pressing
Key control.
Main control chip obtains speed setting value by key module and key program；Main control chip passes through Rotating speed measring circuit
Speed feedback value is obtained with Rotating speed measring program；It is fixed that main control chip is obtained by alternating current signal detection circuit and analog-to-digital conversion program
Electron current value of feedback；Main control chip obtains direct current signal value of feedback by direct current signal detection circuit and analog-to-digital conversion program, when
When direct current signal value of feedback is in range of set value carry out program in next step, not in range of set value when trigger fault interrupting journey
Sequence, stops the output of SPWM signal and work light flashes；Main control chip generates program by feedback calculation procedure and SPWM
Execute fuzzy/two sections of control algolithms of PI；
In the plus/minus fast stage, current amplitude controller exports maximum allowed current, and stator current amplitude remains unchanged, and turns
Sub- acceleration or deceleration plays a leading role dependent on input frequency, fuzzy frequency control；In steady-state process, it is defeated to obscure frequency controller
Frequency corresponding with speed command out, input frequency remain unchanged, and keep spinner velocity by control stator current amplitude
Constant, current amplitude PI control plays a leading role；
The course of work of fuzzy frequency controller: passed through in the plus/minus fast stage according to speed error and speed setting value
The frequency values of fuzzy logic inference adjustment inverter are to control spinner velocity；In final steady-state process, speed setting value is constant,
The speed error as caused by pulse-type load relies primarily on current amplitude PI controller at this time and is adjusted；
The course of work of current amplitude PI controller: in the plus/minus fast stage, stator current amplitude is set as Driven by inverter
The maximum permissible value of system relies primarily on fuzzy frequency controller at this time and carries out motor plus/minus velocity modulation section；In final stable state rank
Section, holding input power frequency are constant value, adjust stator current amplitude according to speed error to control spinner velocity.By electric current
Amplitude control model is defined as according to speed error range from boost phase patterns of change to steady-state process mode, steady-state process mould
Formula, from steady-state process patterns of change to boost phase mode, in control algolithm, proportionality coefficient and integral coefficient are according to different
Mode is determined；
Main control chip exports Three-phase SPWM corresponding with given rotating speed and controls signal to inverter circuit according to operation result
Driving circuit, real-time turn-on and turn-off control is carried out to the IGBT in inverter circuit, thus changes inverter circuit output
The amplitude and frequency of three-phase alternating current, so that the intelligent frequency-conversion under realizing pulse-type load adjusts the speed, detailed process is referring to Fig. 7.
It should be appreciated that described above, the specific embodiments are only for explaining the present invention, is not intended to limit the present invention.By
The obvious changes or variations that spirit of the invention is extended out are still in the protection scope of this invention.
Claims (6)
1. a kind of Intelligent frequency conversion speed adjusting device suitable for pulse-type load, which is characterized in that the Intelligent frequency conversion speed adjusting device
Input be single-phase alternating current, output is electric voltage frequency and the adjustable three-phase alternating current of amplitude；And the intelligent frequency-conversion speed regulation dress
The hardware circuit set is made of main circuit and control circuit, wherein the main circuit includes current rectifying and wave filtering circuit, inverter circuit, institute
State control circuit include main control chip circuit, key and display circuit, direct current signal detection circuit, alternating current signal detection circuit,
Rotating speed measring circuit, isolation and SPWM driving circuit, auxiliary power circuit, work light circuit, relay drive circuit；
The rectification circuit is worked by rectification module, and the filter circuit is by two filter capacitor parallel operations
's；And current-limiting resistance is connected between the rectification module and the filter capacitor, circuit drives are configured on the current-limiting resistance
Relay；The inverter circuit is worked by intelligent power module；The function of the main control chip circuit is that basis connects
The key command received, the feedback signal of direct current signal detection circuit, alternating current signal detection circuit, Rotating speed measring circuit, makes
Logic judgment, output control the SPWM control signal that IGBT is turned on and off in the inverter circuit；The main control chip circuit
It is to be worked by main control chip；The main control chip selects STM32F103ZET6 microprocessor；
The function of the key and display circuit be signal is received by key, and signal exported in the form of key command to
Main control chip circuit, main control chip are exported signal to display module by display circuit；The key and display circuit are logical
It crosses three key modules and display module carrys out work, three key modules respectively correspond acceleration, deceleration and start and stop instruction,
The display module selects 12864 LCD MODULEs；
The function of the direct current signal detection circuit is acquisition DC voltage, current signal, is believed after operation amplifier with Voltage Feedback
Number form export and give main control chip circuit；The function of the alternating current signal detection circuit is to threephase asynchronous stator electricity
Stream is sampled, and is adjusted to 0V to 3.3V voltage signal, is exported in the form of voltage feedback signal and give main control chip circuit；It is described
Alternating current signal detection circuit is worked by sampling resistor and bidirectional current detection module AD8210；
The function of the Rotating speed measring circuit is the pulse signal for acquiring photoelectric encoder output, by triode amplification, capacitor
After photoelectrical coupler shaping and isolation, is exported in the form of speed feedback signal and give main control chip circuit；It is described isolation and
SPWM driving circuit is by isolation module and SPWM drive circuit works, and the SPWM driving circuit is strong using load capacity
Pull-up resistor form；
The function of the auxiliary power circuit is to reduce city for the voltage of 220V single-phase alternating current, to meet different circuits to voltage
Requirement；The function of the work light circuit is instruction circuit working state, is by red LED lamp drive circuit works
's.
2. a kind of control method of the Intelligent frequency conversion speed adjusting device suitable for pulse-type load, which is characterized in that the controlling party
Method is to control the hardware circuit by software algorithm to realize；And the software algorithm is made of main program and subprogram,
Described in main program be system initialization function, the subprogram includes that SPWM generates program, Rotating speed measring program, analog-to-digital conversion
ADC program, key and display program, feedback calculation procedure；
The main program: initializing each program function, subsequently into System self-test, if the System self-test result is
Do not pass through, then returns to upper level and described program function is initialized again, carry out System self-test again later；If system is certainly
Inspection result is to pass through, then bring into operation each subprogram, until whole the end of the programs；
The SPWM generates program: exporting 6 road SPWM waves using the timer, configures SPWM wave control signal by look-up table
Duty ratio, and carry out phase sequence fitting, the Three-phase alternating current signal of the inverter circuit output made to differ 120 degree；
The Rotating speed measring program: using the input capture function of the timer, in I/O port detection photoelectric encoder capture
The high level lasting time of monophasic pulses if signal, if the high level lasting time is too short or affiliated monophasic pulses if letter is not detected
Number, then system failure is regarded as, the output of SPWM wave is stopped；
The analog-to-digital conversion ADC program: the voltage feedback signal of direct current signal detection circuit and alternating current signal detection circuit is defeated
Enter to main control chip, the main control chip carries out analog-to-digital conversion to voltage value to be stopped if the deviation between setting value is larger
The output of SPWM wave；
The key and display program: start and stop and feed speed control are carried out by key, and are set by key module setting speed
Definite value passes through display module real-time display motor status amount；
Feed back calculation procedure: by speed feedback signal, direct current signal detection circuit feedback signal, alternating current signal detection electronic feedback
Signal is compared with setting value respectively, is mutually tied according to comparison result using fuzzy frequency controller/current amplitude PI controller
Fuzzy/two sections of the PI control algolithm closed refreshes SPWM wave pulse signal.
3. a kind of control method of Intelligent frequency conversion speed adjusting device suitable for pulse-type load according to claim 2,
Be characterized in that, described fuzzy/two sections of control algolithms of PI refer to: when speed error value is not zero, main control chip first determine whether be
Still the revolving speed caused by steady-state process is due to disturbance changes the order of plus/minus speed；If plus/minus speed order, then frequency control is obscured
System plays a leading role, and the fuzzy frequency control is executed by fuzzy frequency controller；If in steady-state process since disturbance is drawn
The revolving speed risen changes, then current amplitude PI control plays a leading role, and current amplitude PI control is controlled by current amplitude PI
Device executes；The speed error value refers to the difference of speed setting value and speed feedback signal；
The course of work of the fuzzy frequency controller are as follows: using speed error value, speed setting value as fuzzy frequency controller
Input, the fuzzy frequency controller described later is successively blurred, fuzzy logic inference reconciliation fuzzification process, final defeated
The slip frequency value of motor rotor speed is controlled out；Wherein, the input value of the blurring is speed error value and revolving speed setting
Value, output valve be the fuzzy language value of speed error value, the fuzzy language value of speed setting value, speed error value degree of membership,
The degree of membership of speed setting value；The input value of the fuzzy logic inference is the output valve of the blurring, and output valve is slip
The fuzzy language value of frequency values and the degree of membership of slip frequency value；The input value of the defuzzification is the defeated of the fuzzy reasoning
It is worth out, output valve is the exact value of slip frequency；
The current amplitude PI controller includes the subtracter of calculating speed error, PI module, clipping module, the course of work
Are as follows: when receiving plus/minus speed order, speed error value is larger, and PI module has biggish output valve, at this moment needs to pass through clipping module
Effect, guarantee motor input current amplitude remain unchanged；In steady-state process, speed error value is smaller, the output valve of PI module
Smaller than the limit value of clipping module, then revolving speed is controlled by inverter current amplitude.
4. a kind of control method of Intelligent frequency conversion speed adjusting device suitable for pulse-type load according to claim 2,
It is characterized in that, the SPWM generates program and is provided with dead time, prevents upper and lower two IGBT of the same bridge arm of the inverter circuit
It opens simultaneously and burns out the intelligent power module.
5. a kind of Intelligent frequency conversion speed adjusting device suitable for pulse-type load according to claim 1 is used for phase asynchronous
The VVVF speed regulation of motor.
6. a kind of control of the Intelligent frequency conversion speed adjusting device suitable for pulse-type load according to claim 2-4 any one
Method processed is used for the VVVF speed regulation to threephase asynchronous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470701.4A CN110061679B (en) | 2019-05-31 | 2019-05-31 | Intelligent variable-frequency speed regulation device suitable for pulse type load and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470701.4A CN110061679B (en) | 2019-05-31 | 2019-05-31 | Intelligent variable-frequency speed regulation device suitable for pulse type load and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110061679A true CN110061679A (en) | 2019-07-26 |
| CN110061679B CN110061679B (en) | 2021-03-12 |
Family
ID=67325395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910470701.4A Active CN110061679B (en) | 2019-05-31 | 2019-05-31 | Intelligent variable-frequency speed regulation device suitable for pulse type load and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110061679B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865559A (en) * | 2020-12-31 | 2021-05-28 | 华工科技(广东)有限公司 | Intelligent frequency-shift water treatment control system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6075338A (en) * | 1997-01-13 | 2000-06-13 | Sgs-Thomson Microelectronics S.R.L. | Driving of a three-phase motor with fuzzy logic control of the slip |
| CN2552253Y (en) * | 2002-05-17 | 2003-05-21 | 南京太阳升信息网络有限公司 | Domestic electrical appliance driving system |
| CN2667799Y (en) * | 2003-11-19 | 2004-12-29 | 王长江 | Low-cost high-performance DC brushless electric machine controller |
| CN205249112U (en) * | 2015-12-14 | 2016-05-18 | 甘肃机电职业技术学院 | Novel low -voltage distribution steps down energy -conservingly device |
| CN108599650A (en) * | 2018-05-31 | 2018-09-28 | 大连海事大学 | Small-sized Marine electric power brushless direct-current propulsion electric machine control system based on PI type Fuzzy |
-
2019
- 2019-05-31 CN CN201910470701.4A patent/CN110061679B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6075338A (en) * | 1997-01-13 | 2000-06-13 | Sgs-Thomson Microelectronics S.R.L. | Driving of a three-phase motor with fuzzy logic control of the slip |
| CN2552253Y (en) * | 2002-05-17 | 2003-05-21 | 南京太阳升信息网络有限公司 | Domestic electrical appliance driving system |
| CN2667799Y (en) * | 2003-11-19 | 2004-12-29 | 王长江 | Low-cost high-performance DC brushless electric machine controller |
| CN205249112U (en) * | 2015-12-14 | 2016-05-18 | 甘肃机电职业技术学院 | Novel low -voltage distribution steps down energy -conservingly device |
| CN108599650A (en) * | 2018-05-31 | 2018-09-28 | 大连海事大学 | Small-sized Marine electric power brushless direct-current propulsion electric machine control system based on PI type Fuzzy |
Non-Patent Citations (1)
| Title |
|---|
| 黄建清: "基于DSP的异步电机矢量控制系统的研究及实现", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865559A (en) * | 2020-12-31 | 2021-05-28 | 华工科技(广东)有限公司 | Intelligent frequency-shift water treatment control system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110061679B (en) | 2021-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105162381B (en) | No electrolytic capacitor variable frequency drive control system and control method based on PR regulations | |
| CN108809176B (en) | A kind of asynchronous motor speed-regulating system control method based on Buck-Boost matrix converter | |
| CN101847873B (en) | Novel nonlinear control method for active filter | |
| CN100373760C (en) | Control method of induction motor | |
| CN104967379B (en) | Dual-feed asynchronous wind power generator is based on the anti-stator method for inhibiting harmonic current for pushing away control under a kind of network deformation | |
| CN112467972A (en) | Control method and device of PFC circuit | |
| CN105897098A (en) | Elimination method for dead zone effect in motor FOC (field-oriented control) control operational method | |
| CN105846728B (en) | A kind of intelligent AC regulating fan method for controlling number of revolution | |
| CN110061679A (en) | A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load | |
| CN107425780A (en) | A kind of system and method for brushless dual-feed motor Direct Torque Control | |
| CN105811438B (en) | It is a kind of based on virtual synchronous machine without frequency difference control method and device | |
| CN203057040U (en) | Discrete frequency-conversion soft starting device with no speed sensor | |
| CN104541222B (en) | Silent oscillation reactive power compensation device and voltage control method | |
| CN106787851A (en) | A kind of Single-phase PWM Rectifier control method for suppressing starting current | |
| CN104218605A (en) | Non-impact-current grid connection method for three-phase voltage source grid-connected inverters | |
| Sivakumar et al. | Mitigation of supply current harmonics in fuzzy-logic based 3-phase induction motor | |
| CN104065091B (en) | There is the static reacance generator of complete APF function | |
| CN106899241B (en) | Brushless doubly-fed motor starting control device and method | |
| Jun et al. | Study and simulation of a novel hysteresis current control strategy | |
| CN205304654U (en) | Brushless double -fed motor's asynchronous soft start structure | |
| CN105024396A (en) | Energy feedback frequency converter | |
| CN111130420B (en) | Double-speed control method of digital X-ray bulb tube single-phase rotating anode motor | |
| CN106899242B (en) | Brushless doubly-fed motor starting control device and method | |
| CN107294460A (en) | A kind of soft or hard control method for starting adjustment of electric bicycle controller | |
| CN107947238B (en) | Inverter nonlinear adaptive PQ control method under a kind of grid connection state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230110 Address after: Room 304, 3/F, Block E, New Economic Industrial Park, No. 233, Naner Road, Dongying District, Dongying City, Shandong Province, 257000 Patentee after: Dongying Jiesheng Electric Technology Co.,Ltd. Address before: 710065, No. 18, two East, electronic road, Shaanxi, Xi'an Patentee before: XI'AN SHIYOU University |