CN103996338B - Intelligent open type multifunctional Power Electronic Experimentation device - Google Patents
Intelligent open type multifunctional Power Electronic Experimentation device Download PDFInfo
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- CN103996338B CN103996338B CN201410261906.9A CN201410261906A CN103996338B CN 103996338 B CN103996338 B CN 103996338B CN 201410261906 A CN201410261906 A CN 201410261906A CN 103996338 B CN103996338 B CN 103996338B
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Abstract
The present invention relates to intelligent open type multifunctional Power Electronic Experimentation device, including power supply, modular assembly, display screen and switch.Display screen uses touch screen, is provided with multiple function button, can select different circuit as required, it is achieved disparate modules function.Modular assembly has multiple functional module to include DC chopper circuit module, phase control rectifier circuit module, sinusoidal pulse width modulation inverter circuit module；The corresponding corresponding printed circuit board (PCB) of each functional module, printed circuit board (PCB) comprises electronic devices and components and signal terminal.Circuit extension and easy-to-connect, different measuring instrument and load are accessed by outside.Power supply uses three-phase and four-line alternating current power supply, is accessed by isolating transformer and pressure regulator, is converted to, by device internal auxiliary power supply, the different grades of power of alterating and direct current that each module needs.It is reasonable in design, easy to operate, simple in construction, and sense directly perceived is strong, helps student or scientific research personnel grasp basic experimental technique and strengthen the training of basic skill.
Description
Technical field
The present invention relates to a kind of intelligent open type multifunctional Power Electronic Experimentation device, it is applicable to the electricity of engineering and polytechnic universities
Gas info class, control class, the experimental teaching of automation class and research work, be also adapted to the digital control skill of applied power electronics
The research of art.The present invention can help student or scientific research personnel grasp basic experimental technique and strengthen the training of basic skill,
And on this basis by the present invention provide experiment porch, use kinds of experiments mode multiple circuit is studied.
Background technology
At present, instruments used for education market provides miscellaneous instruments used for education, but as far as the applicant is aware, many instruments used for education
The experiment porch for teaching that supplier provides mainly is verified as main with instructional function, though aesthetic in appearance, easy-to-connect, but lack
Point is it is also obvious that as visual poor with autgmentability, only carry out wiring from panel and cannot understand device true form and circuit
Structure, in experimental provision, device regular collocation limits the development thinking of user simultaneously, thus causes user to play
The subjective initiative of self and creative thinking thereof.
Chinese patent literature CN2444286 is disclosed " module type electronic experiment device " (application number: 00218188.6),
It is by some pieces of base plates, some pieces of connecting plates, connects post and combined console that backplate is constituted and line module placed on it
Plate forms.Owing to the program can make base plate be combined into combined console, line the most thereon freely from monolithic to tens piece
Road module board can be processed into all size, had both been suitable for number electricity and also has been adapted for mould electricity sum, mould hybrid circuit test circuit, and so, had learned
During during raw Experiment of Electrical Circuits and to electronics, circuit developmental research, circuit may be designed to single and various ways combination, is easy to behaviour
Make, and wiring is simple and reliable.Applicant finds after studying this device, and it there is problems of, using the teaching of the invention it is possible to provide real
The circuit tested only has a few, and the structure of these circuit is single, and performance is the highest.Cause the user cannot be on this basis
Carry out circuit exploitation and design, thus cause the application of this device limited.
Chinese patent literature CN203276673U disclosed " a kind of electronic experimental device " (application number:
201320214073.1) comprising: be adapted to provide for measuring electronic test board a little, described measurement point is positioned at this electronic test board more
The back side, and include: current measurement point, voltage measurement point, the back side of described electronic test board is provided with measurement module；Described measurement
Module includes: each current acquisition unit of being connected with each current measurement point, voltage measurement point respectively, voltage acquisition unit, and respectively
Current acquisition unit, voltage acquisition unit are connected with AD unit respectively, be connected with described AD unit be adapted to detect for phase induced current,
The MCU unit of voltage data, be connected with this MCU unit is suitable to display phase induced current, the LED display unit of voltage data.Make
Used time, user can the related data of each test point of real time inspection electronic test board, when a certain parameter of electronic test board is carried out
After adjustment, it is possible to understand the data variation after adjusting in time, the most successful with judgment experiment.It there is problems of, and LED shows
Unit is the simplest.Its electronic test board used can provide experiment content few and have certain limitation, MCU and AD adopts
Sample port is limited, does not also account for data acquisition rate, stores functional requirement, thus limits its application.
Disclosed " a kind of programmable instrument controlled with network and manage function of Chinese patent literature CN201392602
Virtual experimental system " (application number: 200920107000.6), it includes that master server, experimental circuit are connected with master server
Customer side main frame and the bar code scan instrument that is connected with client host；Described master server include main control platform,
Experimental circuit part of detecting and virtual circuit part of detecting, experimental circuit part of detecting is connected with experimental circuit, and virtual circuit is surveyed
Examination part is realized by software module on master server.Present system provides real circuits and two kinds of experiment sides of virtual circuit
Formula, client by client host choice experiment mode, and can carry out experimental implementation by remote network control, it is achieved far-end
The function such as data acquisition, data analysis and result output.This invention is simple to operate, realize sharing of device resource, reduces real
Test room resources costs.It is disadvantageous in that, realizes doing virtual experimental by network management and lacks by user on the spot in person
Practical operation sense.And still have certain deficiency for improving the training of the practical operation technical ability of user.This device is not
Be beneficial in pre-internship time the raising of the students ' practical ability required, be unfavorable for student intuitively to the function of electronic device be familiar with and
Practical.
Summary of the invention
It is an object of the invention to, the deficiency existed for above-mentioned prior art, improve, propose and study intelligent opening
Put formula multifunction electronic electric power experimental provision.The present invention can make according to experiment content and complete kinds of experiments, and it carries out reality
The device complexity testing employing is low, and components' placement is rationally simple, easy to connect, processing ease, it is possible to meet teaching and section
The primary demand ground.
The technical solution of the present invention is, including power supply, modular assembly, display screen and switch, modular assembly has multiple
Functional module, has different circuit function, and display screen is provided with function key, it is characterised in that the merit of each Implement of Function Module
The function key being provided with by display screen carries out selecting to set, and the circuit that each functional module is used is by printing electricity accordingly
Entity circuit made by road plate, printed circuit board (PCB) comprises electronic devices and components and signal terminal, measuring instruments and load by outward
Portion accesses；Power supply uses external AC power supply, and external AC power supply is accessed, by device by isolating transformer and pressure regulator
Portion's accessory power supply is converted to the different grades of power of alterating and direct current that each functional module needs.
It is characterized in that, display screen uses touch screen, and touch screen is configured with multiple function key, has man-machine
Interface, by operating multiple function keys and functional switch, it is possible to realize different circuit function selection, control parameter sets, and passes through
Touch screen has guided selected teaching and scientific research to test；Touch screen is 8 cun of 65K color TFT touch screen.
It is characterized in that, multiple functional modules with different circuit function are combined into education experiment special module assembly,
Education experiment special module assembly includes DC transfer circuit module, phase control rectifier circuit module, sinusoidal pulse width modulation inversion electricity
Road module.
It is characterized in that, DC transfer circuit module use circuit by inputting 24V power interface, DC driven interface,
Forward converter, Boost circuit, Buck reduction voltage circuit, complete/half-bridge circuit, DC detecting interface forms, and wherein, inputs 24V
Power interface, DC driven interface and the common interface that DC detecting interface is DC transfer circuit module, connect normal shock respectively
Circuit, Boost circuit, Buck reduction voltage circuit, complete/half-bridge circuit, DC transfer circuit module is according to relay on-off not
Same interface, thus realize the function of different DC transfer circuits.
It is characterized in that, phase control rectifier circuit module use circuit by phased AC power interface, phased driving interface,
Single-phase half-wave phase control rectifier circuit, single-phase full bridge phase control rectifier circuit, three phase full bridge phase control rectifier circuit and phased detection interface
Composition；Wherein, phased AC power interface, phased driving interface and phased detection port are the public of phase control rectifier circuit module
Interface, connects single-phase half-wave phase control rectifier circuit, single-phase full bridge phase control rectifier circuit, three phase full bridge phase control rectifier circuit respectively；
Main circuit and interface circuit use Control to select, it is possible to realized the function of different rectification circuits by various combination；
The circuit that phase control rectifier circuit module uses can topology, deformation, have redundancy, it is possible to complete single-phase and three-phase phase control rectifier electricity
The performance study on road.
It is characterized in that, sinusoidal pulse width modulation inverter circuit module is driven interface, list by inversion AC power interface, inversion
Phase full bridge inverter, three-phase full-bridge inverting circuit and inversion detection interface composition；Wherein, inversion AC power interface, inversion
Drive interface and inversion to detect the common interface that interface is sinusoidal pulse width modulation inverter circuit module, connect single-phase full bridge respectively inverse
Power transformation road, three-phase full-bridge inverting circuit, it is possible to complete single-phase and three phase sine pulse width modulated inverter circuit characteristic research.
It is characterized in that, touch screen connects DSP panel, and DSP panel have employed dsp chip, completes closed loop control,
Dsp chip uses the chip TMS320F28335 of TI company, and dsp chip is arranged on DSP panel, and DSP panel is according to touch
Screen selection circuit function is different and publishes different driving signals, is at best able to be simultaneously emitted by 12 roads and drives signal, drives signal
Including PWM123/AB and PWM456/AB；Wherein, signal PWM123/AB is driven to drive plate to be converted to isolation by three-phase PWM
PWM drive signal T1AB, T2AB, T3AB, drive signal PWM456/AB to be converted to current mode by three-phase phased driving plate and touch
Signalling VT1-VT6；In DC transfer circuit module, Boost circuit, Buck reduction voltage circuit, forward converter use single tube
Driving, driving signal is T1A；Half-bridge circuit is two-tube driving symmetrical above and below, and driving signal is T1AB；Full-bridge circuit is two bridges
Arm drives, and driving signal is T1AB, T2AB；In phase control rectifier circuit module, single-phase half-wave phase control rectifier circuit is that single tube drives,
Driving signal is VT1, and the upper pipe of single-phase full bridge phase control rectifier circuit drives signal to be VT1/3, and down tube drives signal to be VT4/6；
The upper pipe of three phase full bridge phase control rectifier circuit drives signal to be VT1/3/5, and down tube drives signal to be VT4/6/2；Sinusoidal pulsewidth is adjusted
In inverter circuit module processed, the driving signal of two brachium pontis of single-phase full bridge inverter circuit is T1AB, T2AB, three phase full bridge inversion electricity
The driving signal of three brachium pontis on road is respectively T1AB, T2AB, T3AB.
The present invention is reasonable in design, easy to operate, simple in construction, and sense directly perceived is strong, and student or scientific research personnel can be helped to grasp
Basic experimental technique and the training strengthening basic skill.It has the advantage, that
1) modularity, comes together in the function of multinomial experiment equipment needed thereby one, thus has saved equipment purchasing fund.
2) be student and teacher provide sizable exploitation and innovation environment, can according to design need carry out hardware
Design and software development, until last software and hardware test.The present invention can effectively improve the energy of starting of student for teaching
Power, the Creative Thinking of developing student.
3) maintenance upgrade is convenient, can quickly find out failure cause when equipment breaks down, repair the most very convenient；With
Time can also be updated according to the development of technology, thus saved scrap build and reprocessed fund.
4) floor space is little, can save laboratory land used, it is not necessary to arrange special power control, cable duct, cement
Piers etc., the present invention only needs the power supply of three-phase and four-line to come into operation.
5) rational in infrastructure, the complete function of the present invention, the parameter characteristic provided can simulate General experimental unit；Experimental machine
Pool-size is little, and power consumption is little, configures complete.
6) connecting line of the present invention uses strong, weak electricity separately, and forceful electric power plug, both light current plugs can not interfix, it is to avoid strong
It is electrically accessed weak current equipment, causes this device damage；Circuit connecting mode is safe and reliable, rapid, easy.
7) power supply uses three-phase isolation transformer isolation, is provided with voltage-type earth leakage protective device and current mode earth leakage protective dress
Put, the personal safety of effective protection operator, create precondition for open laboratory.
Accompanying drawing explanation
Fig. 1, the basic structure block diagram of the present invention；
Fig. 2, appearance structure schematic diagram of the present invention；
Fig. 3, internal structure schematic diagram of the present invention；
Fig. 4, the power interface schematic diagram of the present invention；
The circuit block diagram of the DC chopper circuit module that Fig. 5, the present invention use；
The circuit block diagram of the phase control rectifier circuit module that Fig. 6, the present invention use；
The circuit block diagram of the sinusoidal pulse width modulation inverter circuit module that Fig. 7, the present invention use；
Fig. 8, the present invention each circuit module signaling interface schematic diagram.
In figure: 1, external AC power supply；2, isolating transformer；3, pressure regulator；4, measuring instruments；5, voltmeter；6, electric current
Table；7, oscillograph；8, education experiment special module assembly；9, on and off switch；10, DC transfer circuit module；11, phase control rectifier
Circuit module；12, sinusoidal pulse width modulation inverter circuit module；13, display screen；14, load；15, motor；16, load box；17、
Cabinet；18, display lamp；19, three-phase uncontrollable rectifier main circuit；20, three-phase phased driving plate；21, DC converter plate；22、DSP
Panel；23, accessory power supply plate is controlled；24,4 road 24V accessory power supply plate；25, detection drives protection board；26, three-phase PWM drives
Dynamic plate；27, alternating current power supply input charge protector；28, input 24V power interface；29, forward converter；30, Boost boosting
Circuit；31, Buck reduction voltage circuit；32, complete/half-bridge circuit；33, DC detecting interface；34, DC driven interface；35, phased friendship
Stream power interface；36, single-phase half-wave phase control rectifier circuit；37, single-phase full bridge phase control rectifier circuit；38, three phase full bridge is phased whole
Current circuit；39, phased detection port；40 phased driving interfaces；41, inversion AC power interface；42, single-phase full bridge inversion electricity
Road；43, three-phase full-bridge inverting circuit；44, inversion detection interface；45, inversion drives interface.
Detailed description of the invention
Below, with reference to the accompanying drawings, embodiments of the invention are described in detail.
As it is shown in figure 1, the present invention includes power supply, modular assembly, display screen 13 and switch.Switch includes on and off switch 9 He
Functional switch.Display screen 13 uses 8 cun of 65K color TFT touch screen, and this touch screen is configured with multiple function button, has convenient fast
Prompt man machine interface.By operating multiple function keys and functional switch, it is possible to realize different circuit function selection, control parameter sets
Fixed, guide selected teaching and scientific research to test by touch screen.Modular assembly has multiple functional module, has different circuit
Function.Multiple functional module combination structure teaching experiment special module assemblies 8 with different circuit function.Power supply uses external
Alternating current power supply 1, external AC power supply 1 uses the 380V alternating current power supply of three-phase four-wire system, on and off switch 9 to be external AC power supply 1
Break-make to the power supply of education experiment special module assembly 8 controls.External AC power supply 1 is by isolating transformer 2 and pressure regulator 3 He
On and off switch 9 accesses.Education experiment special module assembly 8 includes DC transfer circuit module 10, phase control rectifier circuit module 11
With sinusoidal pulse width modulation inverter circuit module 12, it is used alone or is mutually combined these functional modules of use, it is possible to complete more than 20
Experiment in terms of individual power electronics and Electric Drive.The circuit that each functional module uses determines according to function, and it is used
Circuit makes entity circuit by corresponding printed circuit board (PCB) (PCB).Only install on printed circuit board (PCB) (PCB) electronic devices and components and
Signaling interface terminal, does not include measuring instruments.Measuring instruments 4 required when testing is accessed by outside.Measuring instruments 4 includes
Voltmeter 5, ammeter 6 and oscillograph 7, select as required when carrying out specific experiment.Load 14 is provided by outside, negative
Carry 14 and include motor 15 and load box 16, select as required when carrying out specific experiment.
As in figure 2 it is shown, present invention employs cabinet 17 to install modular assembly, display screen 13 and external AC power supply 1.Cabinet
Equipped with display screen 13, on and off switch 9 and display lamp 18 on the front panel of 17.Display screen 13 uses touch screen, touch screen to have
Conveniently man machine interface, by operating multiple function keys, it is possible to realizes circuit function and selects, controls parameter setting, passes through
Touch screen has guided selected education experiment.Touch screen uses 8 cun of 65K color TFT touch screen.Display lamp 18 is used for indicating electricity
Source duty.
As it is shown on figure 3, the entity that cabinet 17 is internally provided with each accommodation function module is used circuit is corresponding
Circuit, becomes including alternating current power supply input charge protector 27, three-phase uncontrollable rectifier plate 19, three-phase phased driving plate 20, direct current
Parallel operation plate 21, DSP panel 22, control accessory power supply 23,4 road 24V accessory power supply plate 24, detection drive protection board 25, three-phase
PWM drives plate 26.Wherein, control accessory power supply 23,4 road 24V accessory power supply plate 24, detection drives protection board 25, three-phase PWM to drive
Dynamic plate 26, alternating current power supply input charge protector 27 are arranged on the bottom in cabinet 17, and DSP panel 22 is arranged on cabinet 17
Interior centre, it is upper that three-phase uncontrollable rectifier plate 19, three-phase phased driving plate 20, DC converter plate 21 are arranged in cabinet 17
Portion.
As shown in Figure 4, the power supply input of the present invention is powered for three-phase 380AC, by isolating transformer 2, pressure regulator 3 and electricity
Source switch 9 supplies to the entity circuit of phase control rectifier circuit module 11 and the entity circuit of sinusoidal pulse width modulation inverter circuit module 12
Electricity.On and off switch 9 uses three-phase 4P on and off switch QS, and other parts power supply is provided by accessory power supply.Present invention employs two
Accessory power supply, controlling accessory power supply plate 23 provides+5V as the accessory power supply within device for DSP panel 22, and +/-12V supplies
Electricity；4 road 24V accessory power supply plates 24 provide 4 tunnel +/-24V to power as the accessory power supply within device, and phased driving plate is given on 1 tunnel
20 power supplies, 2 tunnels drive plate 26 to provide input DC power to DC converter plate 21 by three-phase PWM.Above-mentioned two auxiliary electricity
Source is connected with external AC power supply 1 by pressure regulator 3 and isolating transformer 2 respectively.
As it is shown in figure 5, the circuit that the DC transfer circuit module 10 of the present invention uses is by inputting 24V power interface 28, directly
Stream drives interface 34, forward converter 29, Boost circuit 30, Buck reduction voltage circuit 31, complete/half-bridge circuit 32, DC detecting
Interface 33 forms.Wherein, input 24V power interface 28, DC driven interface 34 and DC detecting interface 33 are DC converting electricity
The common interface of road module, as input 24V power interface 28, DC driven interface 34 and the DC detecting interface of common interface
33 connect forward converter 29, Boost circuit 30, Buck reduction voltage circuit 31, complete/half-bridge circuit 32 respectively.
As shown in Figure 6, the circuit that the phase control rectifier circuit module 11 of the present invention uses is by phased AC power interface 35, phase
Control drives interface 40, single-phase half-wave phase control rectifier circuit 36, single-phase full bridge phase control rectifier circuit 37, three phase full bridge phase control rectifier electricity
Road 38, phased detection port 39 forms.Wherein, phased AC power interface 35, phased driving interface 40 and phased detection port
39 is the common interface of phase control rectifier circuit module 11, and phased AC power interface 35, phased driving as common interface connect
Mouthfuls 40 and phased detection port 39 connect single-phase half-wave phase control rectifier circuit 36 respectively, single-phase bridge phase control rectifier circuit 37, three
Phase bridge-type phase control rectifier circuit 38.
As it is shown in fig. 7, the sinusoidal pulse width modulation inverter circuit module 12 of the present invention is by inversion AC power interface 41, inversion
Driving interface 45, single-phase full bridge inverter circuit 42, three-phase full-bridge inverting circuit 43, inversion detection interface 44 forms.Wherein, inverse
Become AC power interface 41, inversion drives interface 45 and inversion detection interface 44 is sinusoidal pulse width modulation inverter circuit module 12
Common interface, inversion AC power interface 41, inversion as common interface drive interface 45 and inversion detection interface 44 respectively
Connect single-phase full bridge inverter circuit 42, three-phase full-bridge inverting circuit 43.
As shown in Figure 8, the present invention uses dsp chip, and dsp chip uses chip TMS320F28335, the DSP peace of TI company
Being contained in DSP panel 22, touch screen connects DSP panel 22, and DSP panel 22 is according to touch screen selection circuit function difference
Publish different driving signal, at most can be simultaneously emitted by 12 roads and drive signal, drive signal to include PWM123/AB and PWM456/
AB.Wherein, drive signal PWM123/AB by three-phase PWM drive plate 26 be converted to isolate PWM drive signal T1AB, T2AB,
T3AB, drives signal PWM456/AB to be converted to current mode by the phased driving of three-phase 20 and triggers signal VT1-VT6.Direct current becomes
Changing in circuit module 10, Boost circuit 30, Buck reduction voltage circuit 31, forward converter 29 use single tube to drive, and drive signal
For T1A；Half-bridge circuit is two-tube driving symmetrical above and below, and driving signal is T1AB；Full-bridge circuit is that two brachium pontis drive, and drives letter
Number it is T1AB, T2AB.In phase control rectifier circuit module 11, the driving signal of single-phase half-wave phase control rectifier circuit 36 is VT1；Single-phase
On full-bridge phase control rectifier circuit 37, the driving signal of pipe is VT1/3, and the driving signal of down tube is VT4/6；Three phase full bridge is phased whole
The driving signal of the upper pipe of current circuit 38 is VT1/3/5, and the driving signal of down tube is VT4/6/2.Sinusoidal pulse width modulation inversion electricity
In road module 12, the driving signal of two brachium pontis of single-phase full bridge inverter circuit 42 is respectively T1AB, T2AB, three phase full bridge inversion
The driving signal of three brachium pontis of circuit 43 is respectively T1AB, T2AB, T3AB.
The present invention is for completing circuit closed loop control, and each several part circuit all comprises input voltage measurement, output voltage, electric current inspection
Surveying, detection signal enters detection by differential detection circuit or Hall element and drives protection board 25, then by with touch screen
The DSP panel 22 connected is controlled, by closed loop control and overvoltage, the overcurrent protection merit of digitial controller completion system
Energy.Design power capacity of the present invention and degree more than needed are relatively big, and can carry out entity according to the demand of user on this basis
The secondary development of device.
The technical parameter of the present invention:
(1) input voltage three-phase four-wire system 380V ± 10% 50 ± 1Hz
(2) working environment ambient temperature range is-5～40 DEG C, relative humidity≤75%, height above sea level≤1000m
(3) power capacity :≤3kVA
(4) overall dimensions: length × width × height=1700 × 700 × 600.
The reliability of the present invention is:
1) power supply uses three-phase isolation transformer isolation, is provided with voltage-type earth leakage protective device and current mode earth leakage protective dress
Put, the personal safety of effective protection operator, create precondition for open laboratory.
2) experiment connecting line uses forceful electric power, light current separately, and the plug (forceful electric power plug and light current plug) that both use can not
Interfix, it is to avoid forceful electric power accesses weak current equipment, causes this device damage.
3) voltage x current software and hardware protection, each module is provided with software and hardware voltage x current protection device, once found
Pressing through stream, system blocks driving signal automatically, is effectively prevented device failure.
4) reliable short-circuit protection.Most of power supply within device is provided by single-ended reverse exciting accessory power supply, according to flyback
Formula power supply characteristic, during outfan short circuit, by controlling to adjust automatic locking pulse, automatically blocks energy output, thus prevents short
Pass plays device failure.
The experiment content that the present invention provides includes:
1) experiment content provided by DC chopper circuit module includes: power field effect pipe (MOSFET, IGBT) characteristic
Checking；MOSFET, IGBT drive and protection circuit；The performance study of DC chopper circuit；Blood pressure lowering BUCK Experiment of Electrical Circuits；Boosting
BOOST Experiment of Electrical Circuits；Single-end ortho-exciting electric source is tested；The Flyback Converter is tested；Full-bridge DC-DC switching power supply conversion electricity
Road；Half-bridge DC-DC switching power supply translation circuit；DC power control characteristic research is tested；Rectification circuit active power because of
Number correction；
2) experiment content provided by phase control rectifier circuit module includes: single phase half wave controlled rectifier；Single-phase bridge
Half-controlled rectifier circuit；Single-phase bridge full-controlled rectifier and active-inverter；Three-phase half-wave controlled rectifier circuit；Three-phase semiwave is active
Inverter circuit；Semi-controlled three-phase bridge rectifier circuit；Three-phase bridge fully controlled rectifier and active-inverter；
3) experiment content provided by sinusoidal pulse width modulation inverter circuit module includes: SPWM pulse modulation technology is tested；
Inverter drive circuit performance evaluation；Single-phase Sine Wave Pulse Width Modulation (SPWM) inverter circuit；Three-phase sine-wave pulsewidth degree is adjusted
System (SPWM) Frequency Conversion Theory；Three-phase saddle ripple pulse width modulation frequency changing principle；Three-phase space voltage vector SVPWM Frequency Conversion Theory；
V/f curve determination under SPWM, saddle ripple, space voltage vector modulation mode.
Claims (3)
- The most intelligent open type multifunctional Power Electronic Experimentation device, including power supply, modular assembly, display screen (13) and switch, Modular assembly has multiple functional module, has different circuit function, and display screen (13) is provided with function key, it is characterised in that every The function key that the function of individual Implement of Function Module is provided with by display screen (13) carries out selecting to set, and each functional module is used Circuit make entity circuit by corresponding printed circuit board (PCB), printed circuit board (PCB) comprises electronic devices and components and signal wiring Terminal, measuring instruments (4) and load (14) are accessed by outside；Power supply uses external AC power supply (1), external AC power supply (1) Being accessed by isolating transformer (2) and pressure regulator (3), being converted to each functional module by device internal auxiliary power supply needs not The power of alterating and direct current of ad eundem；Multiple functional modules with different circuit function are combined into education experiment special module assembly (8), education experiment special module assembly (8) includes DC transfer circuit module (10), phase control rectifier circuit module (11), sine Pulse width modulated inverter circuit module (12)；The circuit that described DC transfer circuit module (10) uses is by inputting 24V power interface (28), DC driven interface (34), forward converter (29), Boost circuit (30), Buck reduction voltage circuit (31), complete/half-bridge Circuit (32), DC detecting interface (33) forms, wherein, input 24V power interface (28), DC driven interface (34) and direct current Detection interface (33) is the common interface of DC transfer circuit module (10), connects forward converter (29) respectively, Boost rises piezoelectricity Road (30), Buck reduction voltage circuit (31), complete/half-bridge circuit (32), DC transfer circuit module (10) is according to relay on-off not Same interface, thus realize the function of different DC transfer circuits；The circuit that described phase control rectifier circuit module (11) uses by Phased AC power interface (35), phased driving interface (40), single-phase half-wave phase control rectifier circuit (36), single-phase full bridge are phased whole Current circuit (37), three phase full bridge phase control rectifier circuit (38) and phased detection port (39) composition；Wherein, phased alternating current power supply connects Mouth (35), phased driving interface (40) and the common interface that phased detection port (39) is phase control rectifier circuit module (11), point Do not connect single-phase half-wave phase control rectifier circuit (36), single-phase full bridge phase control rectifier circuit (37), three phase full bridge phase control rectifier circuit (38)；Main circuit and interface circuit use Control to select, it is possible to realize different rectification circuits by various combination Function；The circuit that phase control rectifier circuit module (11) uses can topology, deformation, have redundancy, it is possible to complete single-phase and three-phase The performance study of phase control rectifier circuit；Described sinusoidal pulse width modulation inverter circuit module (12) is by inversion AC power interface (41), inversion drives interface (45), single-phase full bridge inverter circuit (42), three-phase full-bridge inverting circuit (43) and inversion detection interface (44) composition；Wherein, inversion AC power interface (41), inversion drive interface (45) and inversion detection interface (44) to be positive stringy pulse The common interface of wide modulation inverter circuit module (12), connects single-phase full bridge inverter circuit (42), three phase full bridge inversion electricity respectively Road (43), it is possible to complete single-phase and three phase sine pulse width modulated inverter circuit characteristic research.
- 2. according to the intelligent open type multifunctional Power Electronic Experimentation device described in claim 1, it is characterised in that display Screen (13) uses touch screen, and touch screen is configured with multiple function key, has conveniently man machine interface, by operating multiple merits Energy key and functional switch, it is possible to realize different circuit function and select, control parameter setting, guided by touch screen and selected Teaching and scientific research experiment；Touch screen is 8 cun of 65K color TFT touch screen.
- Intelligent open type multifunctional Power Electronic Experimentation device the most according to claim 2, it is characterised in that touch screen Connecting DSP panel (22), DSP panel (22) have employed dsp chip, completes signals collecting and closed loop control, and dsp chip is adopted With the chip TMS320F28335 of TI company, dsp chip is arranged on DSP panel (22), and DSP panel (22) is according to touch screen Selection circuit function is different and publishes different driving signals, is at best able to be simultaneously emitted by 12 roads and drives signal, drives signal packet Include PWM123/AB and PWM456/AB；Wherein, signal PWM123/AB is driven to drive plate (26) to be converted to isolation by three-phase PWM PWM drive signal T1AB, T2AB, T3AB, drive signal PWM456/AB to be converted to electric current by three-phase phased driving plate (20) Type triggers signal VT1-VT6；In DC transfer circuit module (10), Boost circuit (30), Buck reduction voltage circuit (31), Forward converter (29) uses single tube to drive, and driving signal is T1A；Half-bridge circuit is two-tube driving symmetrical above and below, and driving signal is T1AB；Full-bridge circuit is that two brachium pontis drive, and driving signal is T1AB, T2AB；In phase control rectifier circuit module (11), single-phase half Ripple phase control rectifier circuit (36) is that single tube drives, and driving signal is VT1, and the upper pipe of single-phase full bridge phase control rectifier circuit (37) drives Dynamic signal is VT1/3, and down tube drives signal to be VT4/6；The upper pipe driving signal of three phase full bridge phase control rectifier circuit (38) is VT1/3/5, down tube drives signal to be VT4/6/2；In sinusoidal pulse width modulation inverter circuit module (12), single-phase full bridge inverter circuit The driving signal of (42) two brachium pontis is T1AB, T2AB, and the driving signal of three brachium pontis of three-phase full-bridge inverting circuit (43) divides Not Wei T1AB, T2AB, T3AB.
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| CN104730959A (en) * | 2015-03-20 | 2015-06-24 | 佛山市华材职业技术学校 | Intelligent instrument and power electronic practical training device and control method thereof |
| CN105551351B (en) * | 2016-01-27 | 2018-03-30 | 黄家才 | Digital Electric electronics and Electrified Transmission control experimental provision and experimental method in real time |
| CN105575237A (en) * | 2016-03-03 | 2016-05-11 | 中国矿业大学 | Expandable power electronics teaching experiment device |
| CN109951080A (en) * | 2017-02-24 | 2019-06-28 | 华为技术有限公司 | A kind of downconverter device and Differential Detection comparator |
| CN109116080B (en) * | 2018-07-02 | 2020-09-22 | 厦门凤凰创壹软件有限公司 | Intelligent multimeter capable of measuring three-dimensional virtual simulation circuit or component |
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| CN101887655A (en) * | 2009-05-13 | 2010-11-17 | 索卢文思有限公司 | Electric and electronic test practice system |
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| CN203931294U (en) * | 2014-06-13 | 2014-11-05 | 湖北理工学院 | Intelligent open type multifunctional Power Electronic Experimentation device |
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| CN101887655A (en) * | 2009-05-13 | 2010-11-17 | 索卢文思有限公司 | Electric and electronic test practice system |
| CN201859577U (en) * | 2010-05-28 | 2011-06-08 | 北京工业大学 | Combined open electronic technology experiment table |
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