CN206312472U - A kind of adjustable frequency conversion teaching training apparatus of many level - Google Patents
A kind of adjustable frequency conversion teaching training apparatus of many level Download PDFInfo
- Publication number
- CN206312472U CN206312472U CN201621180214.2U CN201621180214U CN206312472U CN 206312472 U CN206312472 U CN 206312472U CN 201621180214 U CN201621180214 U CN 201621180214U CN 206312472 U CN206312472 U CN 206312472U
- Authority
- CN
- China
- Prior art keywords
- level
- voltage
- expansion module
- power
- frequency conversion
- 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.)
- Expired - Fee Related
Links
Abstract
A kind of adjustable frequency conversion teaching training apparatus of many level, belong to embedded Control power electronics teaching equipment field.Including：Main inversion direct current power module, level expansion module, H bridge modules, current sensor, voltage sensor, load blocks, embedded control system unit, expansion module driver element, H bridge modules driver element, multichannel oscillograph, current detection signal processing unit, voltage detection signal processing unit, multi-channel switch power and PC host computer units.The device compares traditional multi-level converter plant, and device for power switching used is less, and the drive circuit needed for reducing switching loss and periphery reduces system complexity, improves device reliability.Present apparatus circuit topological structure is flexible and changeable simultaneously, is integrated with the multiple functional module such as AC frequency conversion, embedded system, Switching Power Supply and is developed for practice teaching, not only saves instruction cost also beneficial to expansion and the innovation ability for exciting student.
Description
Technical field
A kind of the utility model embedded Control power electronics teaching equipment field, and in particular to many adjustable frequency conversions of level
Teaching training apparatus.
Background technology
Embedded Control is an important subject of institution of higher learning's Computer and electronic information specialty, emphatically training student
Manipulative ability and comprehensive using ability, thus a set of actual training device for being available for Faculty and Students' intuitive operation seems particularly heavy
Will.The practical training project of multi-level frequency conversion is because it covers embedded system, power electronics, DSP principles, FPGA development technique and opens
The knowledge such as powered-down source, analog circuit, digital circuit, are that improve one of Students ' Comprehensive important puts into practice problem.And combine current
The power utilization environment of frequency conversion, with very important realistic meaning.The real training of the project can be completed, can comprehensively improve student's
Every quality and business skill, and with certain product development experience.It is past for this practical training project in current teaching practice
Toward many set hardware devices of buying are needed, for example, three level, five level, seven level these three Common levels are if desired completed
The exploitation real training of several multi-level frequency conversion devices, it is necessary to purchase three sets of hardware devices, and with the increase of level number, equipment knot
Structure is complicated, and device for power switching number used is increased sharply, and causes equipment dependability to decline, and instruction cost increases severely, and seriously constrains
The practice of field research effect and student is started chance.The utility model provides a kind of adjustable multi-level frequency conversion practice teaching
Device, by the expansion module of the grafting varying number in tandem circuit structure, you can realize five level, seven level, nine level
The frequency conversion output of even more level numbers.Different real training problems no longer need individually to purchase corollary equipment, it is only necessary to which grafting is by two
Individual set of power switches into expansion module, the structure of traditional multi-level converter plant is not only simplify, while significantly
Reduce the cost of teaching equipment.In addition, the circuit topological structure that the present apparatus is used is novel, control chip is feature-rich, is available for
Student flexibly uses, and contributes to the exploitation of innovation ability, with the extensive scope of application.
Utility model content
In view of the shortcomings of the prior art, the utility model discloses a kind of many adjustable frequency conversion teaching training apparatus of level,
The drawbacks of solving the frequency conversion practical training project of varying level number and need different device, cost is greatly reduced, and this practicality is new
Device for power switching number used in type is also fewer than traditional structure, reduces switching loss, reduces complexity and improves dress
The reliability put.
The utility model is achieved by the following technical programs：
A kind of adjustable frequency conversion teaching training apparatus of many level, it includes：Main inversion direct current power module (1), #1 level
Expansion module (2), #2 level expansion module (3), #n level expansion module (4), H bridge modules (5), current sensor (6), voltage
Sensor (7), load blocks (8), embedded control system unit (9), the driver element of expansion module 1 (10), expansion module 2 drive
Moving cell (11), expansion module n driver elements (12), H bridge modules driver element (13), multichannel oscillograph (14), electric current inspection
Survey signal processing unit (15), voltage detection signal processing unit (16), multi-channel switch power (17) and PC host computer units
(16) the level expansion module that, described teaching training apparatus pass through grafting varying number, is capable of achieving the direct current of varying level number
Voltage inversion alternating voltage, when DC side only has main inversion direct current power module (1), device inversion is in load blocks (8)
Voltage be in three level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), what inversion went out
Voltage is in five level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), #2 level expanded modes
During block (3), the voltage that inversion goes out is in seven level, the like, the level number of frequency conversion alternating current out and the level of grafting expand
Exhibition number of modules is in the relation of 2n+3, and wherein n represents natural number.
Preferably, the structure of each level expansion module is just the same, using two device for power switching inverse parallels and at it
In connect in a parallel branch voltage and the equal direct voltage source of main inversion direct current power module (1) voltage, it is necessary to
The level expansion module in direct current source grafting respective numbers is only needed to during the level number of the alternating voltage of adjustment frequency conversion output.
Preferably, four device for power switching in the device for power switching and H bridge modules (5) in each level expansion module
The alternating voltage that varying level number is provided for load blocks (8) is cut-off in collaboration, and the control signal of device for power switching is by embedded
Control system unit (9) is provided and is input to work(through corresponding expansion module driver element and H bridge modules driver element (13)
The drive end of rate switching device.
Preferably, the electric current and voltage of the current sensor (6) and voltage sensor (7) detection load blocks (8) are logical
Over-current detection signal processing unit (15), voltage detection signal processing unit (16) are input to embedded control system unit
(9) in, each driving power supply, the supply of control power supply in device are provided by multi-channel switch power (17), PC host computer units
(16) communicate and complete the selection of required practical training project with embedded control system unit (9), entered by multichannel oscillograph (14)
The observation directly perceived of many level output voltages of row frequency conversion.
Preferably, the embedded control system unit (9) is by TMS320F28335DSP and EP3C25Q240C8FPGA structures
Into, the floating-point operation control that DSP is used in device, FPGA is used to process PWM generation module and the control of outside D/A chips is patrolled
Volume, multi-channel switch power (17) use UC3844 power source special chips, to generation device need+5V ,+15V, -15V ,+
The voltages such as 24V.The driver element of each device for power switching uses integrated drive chips, device for power switching from IGBT or
The wholly-controled devices such as MOSFET.
The beneficial effects of the utility model are：
The utility model is to be capable of achieving by the expansion module of the grafting varying number on the basis of traditional H-bridge inverter circuit
The frequency conversion output of many level blocks such as five level, seven level, changes a real training in traditional multi-level frequency converter practice teaching
Project needs the situation of set of device, greatlys save teaching equipment buying and maintenance cost.Meanwhile, the circuit that the device is provided
Device for power switching number is few needed for structure, and grafting expansion module is simple, and structure is novel, flexible multi-purpose, can be power electronics, embedding
The multi-disciplinary practice teaching content providing platform such as embedded system, Switching Power Supply, it is applied widely, expand student beneficial to exciting
Exploitation and initiative spirit.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is main circuit diagram of the present utility model；
Fig. 2 is control system architecture figure of the present utility model；
Label in figure is represented respectively：
1st, main inversion direct current power module；2nd, #1 level expansion module；3rd, #2 level expansion module；4th, #n level expanded mode
Block；5th, H bridge modules；6th, current sensor；7th, voltage sensor；8th, load blocks；9th, embedded control system unit；10th, expand
The exhibition driver element of module 1；11st, the driver element of expansion module 2；12nd, expansion module n driver elements；13rd, H bridge modules driver element；
14th, multichannel oscillograph；15th, current detection signal processing unit；16th, voltage detection signal processing unit；17th, variable connector electricity
Source；18th, PC host computers unit.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodiment
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
A kind of adjustable frequency conversion teaching training apparatus of many level, it includes：Main inversion direct current power module (1), #1 level
Expansion module (2), #2 level expansion module (3), #n level expansion module (4), H bridge modules (5), current sensor (6), voltage
Sensor (7), load blocks (8), embedded control system unit (9), the driver element of expansion module 1 (10), expansion module 2 drive
Moving cell (11), expansion module n driver elements (12), H bridge modules driver element (13), multichannel oscillograph (14), electric current inspection
Survey signal processing unit (15), voltage detection signal processing unit (16), multi-channel switch power (17) and PC host computer units
(16) the level expansion module that, described teaching training apparatus pass through grafting varying number, is capable of achieving the direct current of varying level number
Voltage inversion alternating voltage, when DC side only has main inversion direct current power module (1), device inversion is in load blocks (8)
Voltage be in three level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), what inversion went out
Voltage is in five level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), #2 level expanded modes
During block (3), the voltage that inversion goes out is in seven level, the like, the level number of frequency conversion alternating current out and the level of grafting expand
Exhibition number of modules is in the relation of 2n+3, and wherein n represents natural number.
Specifically, the structure of each level expansion module is just the same, using two device for power switching inverse parallels and at it
In connect in a parallel branch voltage and the equal direct voltage source of main inversion direct current power module (1) voltage, it is necessary to
The level expansion module in direct current source grafting respective numbers is only needed to during the level number of the alternating voltage of adjustment frequency conversion output,
It is load that four device for power switching collaboration in device for power switching and H bridge modules (5) in each level expansion module is cut-off
Module (8) provides the alternating voltage of varying level number, and the control signal of device for power switching is by embedded control system unit (9)
There is provided and the driving of device for power switching is input to through corresponding expansion module driver element and H bridge modules driver element (13)
The electric current and voltage of end, current sensor (6) and voltage sensor (7) detection load blocks (8) are by current detection signal
Reason unit (15), voltage detection signal processing unit (16) are input in embedded control system unit (9), each drive in device
Dynamic power supply, the supply of control power supply are by multi-channel switch power (17) offer, PC host computers unit (16) and embedded control system
Unit (9) communication completes the selection of required practical training project, and many level output voltages of frequency conversion are carried out by multichannel oscillograph (14)
Observation directly perceived, embedded control system unit (9) is made up of TMS320F28335DSP and EP3C25Q240C8FPGA, and DSP is used
Floating-point operation control in device, FPGA is used to process the control logic of PWM generation module and outside D/A chips, multichannel
Switching Power Supply (17) uses UC3844 power source special chips, the electricity such as+5V ,+15V, -15V ,+24V needed to generation device
Pressure.The driver element of each device for power switching uses integrated drive chips, and device for power switching is complete from IGBT or MOSFET etc.
Control type device.
In present embodiment, by taking the practice teaching project of single-phase five level frequency conversion as an example, concrete structure is as shown in Figure 1.By
The level number of the alternating current exported in present apparatus frequency conversion and the expansion module number of grafting are in the relation of 2n+3, so the present embodiment
In need one level expansion module of grafting, i.e. #1 level expansion module, and by other inserting groove short circuits.Main inversion direct current power supply
Voltage source V0 in module is equal to voltage source V1, i.e. V0=V1=Vdc in #1 level expansion modules.For ease of simplifying system knot
Structure, Vdc can be set to the 24V of multi-channel switch power output.By the frequency conversion real training of single-phase five level of PC host computer Unit selections
Project, you can PWM pulse is exported by embedded control system unit and is driven by the driver element of expansion module 1, H bridge modules
The turn-on and turn-off of the device for power switching in moving cell control device, and then export the friendship for arriving the voltage of load end in many level
Stream electricity.Sampling and signal modulation process are carried out by the current sensor and voltage sensor of load end and embedded control is transported to
It is used to control to calculate in dsp chip in system unit processed, fpga chip is used to process PWM generation module and outside D/A cores
The control logic of piece, exported by D/A just can intuitively observe desired each physical quantity waveform on multichannel oscillograph.Multichannel
The 5V power supplys of switching power supply output are used for embedded system unit, and ± 15V power supplys are used for driver element.
The process that device realizes multi-level frequency conversion output is further elucidated below, still by taking five level frequency conversion as an example, works as insertion
When formula control system unit output PWM pulsed power switch device conductive is turned off, load terminal voltage is in different electricity
Flat shape formula.Specifically, when E1_a is turned off, E1_b conductings, H_S1 and H_S4 is turned on, load end electricity when H_S2 and H_S3 is turned off
It is 2Vdc to press；When E1_a conductings, E1_b shut-offs, H_S1 and H_S4 are turned on, load terminal voltage is when H_S2 and H_S3 is turned off
Vdc；When E1_a shut-offs, E1_b conductings, H_S1 and H_S4 is turned off, and load terminal voltage is -2Vdc when H_S2 and H_S3 is turned on；When
E1_a is turned on, and E1_b shut-offs, H_S1 and H_S4 is turned off, and load terminal voltage is Vdc when H_S2 and H_S3 is turned on；As H_S1 and H_
S4 is turned off, and load terminal voltage is 0 when H_S2 and H_S3 is turned off.In sum, load terminal voltage can present ± Vdc, 0, ±
2Vdc this five kinds of level forms, the frequency of inverter output voltage depends on the frequency of carrier signal of pwm pulse modulation, this sample dress
Put and just realize that five level alternating voltage frequency conversions are exported using the conducting shut-off of six device for power switching.
The utility model is to be capable of achieving by the expansion module of the grafting varying number on the basis of traditional H-bridge inverter circuit
The frequency conversion output of many level blocks such as five level, seven level, changes a real training in traditional multi-level frequency converter practice teaching
Project needs the situation of set of device, greatlys save teaching equipment buying and maintenance cost.Meanwhile, the circuit that the device is provided
Device for power switching number is few needed for structure, and grafting expansion module is simple, and structure is novel, flexible multi-purpose, can be power electronics, embedding
The multi-disciplinary practice teaching content providing platform such as embedded system, Switching Power Supply, it is applied widely, expand student beneficial to exciting
Exploitation and initiative spirit.
Above example is only used to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to foregoing reality
Example is applied to be described in detail the utility model, it will be understood by those within the art that：It still can be to preceding
State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these
Modification is replaced, and does not make the spirit and model of essence disengaging each embodiment technical scheme of the utility model of appropriate technical solution
Enclose.
Claims (5)
1. adjustable frequency conversion teaching training apparatus of a kind of many level, it includes：Main inversion direct current power module (1), #1 level expand
Exhibition module (2), #2 level expansion module (3), #n level expansion module (4), H bridge modules (5), current sensor (6), voltage are passed
Sensor (7), load blocks (8), embedded control system unit (9), the driver element of expansion module 1 (10), expansion module 2 drive
Unit (11), expansion module n driver elements (12), H bridge modules driver element (13), multichannel oscillograph (14), current detecting
Signal processing unit (15), voltage detection signal processing unit (16), multi-channel switch power (17) and PC host computers unit (18),
The level expansion module that described teaching training apparatus pass through grafting varying number, the DC voltage for being capable of achieving varying level number is inverse
Become alternating voltage, when DC side only has main inversion direct current power module (1), device inversion is to the voltage in load blocks (8)
In three level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), the voltage that inversion goes out is in
Five level, when DC side has main inversion direct current power module (1) and #1 level expansion module (2), #2 level expansion module (3)
When, the voltage that inversion goes out is in seven level, the like, the level number of frequency conversion alternating current out and the level expansion module of grafting
Number is in the relation of 2n+3, and wherein n represents natural number.
2. adjustable frequency conversion teaching training apparatus of many level according to claim 1, it is characterised in that：Each level expanded mode
The structure of block is just the same, a voltage of connecting using two device for power switching inverse parallels and in a parallel branch wherein
The direct voltage source equal with main inversion direct current power module (1) voltage is, it is necessary to adjust the level of the alternating voltage of frequency conversion output
The level expansion module in direct current source grafting respective numbers is only needed to during number.
3. adjustable frequency conversion teaching training apparatus of many level according to claim 1, it is characterised in that：Each level expanded mode
Four device for power switching collaboration in device for power switching and H bridge modules (5) in block is cut-off for load blocks (8) are provided not
With the alternating voltage of level number, the control signal of device for power switching is provided and through corresponding by embedded control system unit (9)
Expansion module driver element and H bridge modules driver element (13) be input to the drive end of device for power switching.
4. adjustable frequency conversion teaching training apparatus of many level according to claim 1, it is characterised in that：The current sense
Device (6) and voltage sensor (7) detection load blocks (8) electric current and voltage by current detection signal processing unit (15),
Voltage detection signal processing unit (16) is input in embedded control system unit (9), each driving power supply in device, control
The supply of power supply is provided by multi-channel switch power (17), and PC host computers unit (18) and embedded control system unit (9) communicate
The selection of practical training project, the observation directly perceived of many level output voltages of frequency conversion is carried out by multichannel oscillograph (14) needed for completing.
5. adjustable frequency conversion teaching training apparatus of many level according to claim 1, it is characterised in that：The embedded control
System unit (9) processed is made up of TMS320F28335DSP and EP3C25Q240C8FPGA, the floating-point operation that DSP is used in device
Control, FPGA is used to process the control logic of PWM generation module and outside D/A chips, and multi-channel switch power (17) is used
The voltages, each device for power switching such as UC3844 power source special chips ,+5V ,+15V ,-the 15V ,+24V needed to generation device
Driver element use integrated drive chips, device for power switching is from wholly-controled devices such as IGBT or MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621180214.2U CN206312472U (en) | 2016-10-27 | 2016-10-27 | A kind of adjustable frequency conversion teaching training apparatus of many level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621180214.2U CN206312472U (en) | 2016-10-27 | 2016-10-27 | A kind of adjustable frequency conversion teaching training apparatus of many level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206312472U true CN206312472U (en) | 2017-07-07 |
Family
ID=59244409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621180214.2U Expired - Fee Related CN206312472U (en) | 2016-10-27 | 2016-10-27 | A kind of adjustable frequency conversion teaching training apparatus of many level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206312472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909045A (en) * | 2017-11-24 | 2018-04-13 | 合肥博焱智能科技有限公司 | Face identification system based on FPGA |
-
2016
- 2016-10-27 CN CN201621180214.2U patent/CN206312472U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909045A (en) * | 2017-11-24 | 2018-04-13 | 合肥博焱智能科技有限公司 | Face identification system based on FPGA |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203313163U (en) | Dynamic signal synthesis device based on programmable Josephson junction array | |
| CN102116848A (en) | System for testing conversion efficiencies of power supplies | |
| CN201374128Y (en) | Experimental teaching device with integrated traffic signal control | |
| CN206312472U (en) | A kind of adjustable frequency conversion teaching training apparatus of many level | |
| CN201069618Y (en) | PLC simulation teaching device | |
| CN106873517B (en) | Fieldbus control experiment training teaching platform | |
| CN203490884U (en) | Relay matrix fault simulation device | |
| CN203085040U (en) | Singlechip learning development plate | |
| CN204255654U (en) | Marine diesel integrated signal simulator | |
| CN203480745U (en) | Commercial power complementary type photovoltaic generation practical training device | |
| CN204719586U (en) | A kind of reversal output circuit | |
| CN203982188U (en) | Circuit control device pick-up unit | |
| CN204008900U (en) | Energy efficiency testing device | |
| CN203490883U (en) | Fault simulation device of current type transformer | |
| CN205318718U (en) | Portable PLC learning | |
| CN201993955U (en) | Bridge-type rectifying teaching demonstration device | |
| Leena et al. | Computer-based laboratory teaching tools: An overview of LabVIEW and MATLAB | |
| CN107993539A (en) | A kind of photovoltaic generation semi-physical teaching emulation platform and its emulation mode | |
| CN205508251U (en) | Portable aerodynamic technology control experimental box | |
| CN203480743U (en) | Relay matrix simulation three-phase current fault apparatus | |
| CN111078177B (en) | Intelligent blackboard USB multi-screen display switching equipment | |
| CN211826376U (en) | Low-power multi-type motor series experiment platform | |
| CN207895747U (en) | A kind of instructional device virtually demonstrated based on circuit analysis | |
| CN210955726U (en) | Comprehensive training box based on electronic circuit and electronic control circuit | |
| CN203325271U (en) | Teaching demonstrator for binary numbers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20171027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |