CN108900104A - IGBT analog device, level analog circuit and three level emulation platforms - Google Patents
IGBT analog device, level analog circuit and three level emulation platforms Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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Abstract
The invention discloses a kind of IGBT analog device, level analog circuit and three level emulation platforms, the IGBT analog device includes optocoupler and first diode, the anode of the light emitting diode of the optocoupler is the grid of IGBT, and the cathode of the light emitting diode of the optocoupler is for being grounded.The collector of the optocoupler is connect with the cathode of the first diode, and connecting node constitutes the drain electrode of IGBT；The emitter of the optocoupler is connect with the anode of the first diode, and connecting node constitutes the source electrode of the IGBT.The present invention is able to solve the IGBT problem more expensive for initial stage algorithm debugging platform cost.
Description
Technical field
The present invention relates to simulation technology field, in particular to a kind of IGBT analog device, level analog circuit and three
Level emulation platform.
Background technique
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), is (double by BJT
Polar form triode) and MOS (insulating gate type field effect tube) composition compound full-control type voltage driven type power semiconductor, it is simultaneous
There is the low conducting of the high input impedance and GTR (power transistor) of MOSFET (Metal-Oxide Semiconductor field effect transistor)
Advantage of both pressure drop.GTR saturation pressure reduces, and current carrying density is big, but driving current is larger, MOSFET driving power very little,
Switching speed is fast, but conduction voltage drop is big, and current carrying density is small.IGBT combines the advantages of both the above device, driving power it is small and
Saturation pressure reduces.It is highly suitable to be applied for converter system such as alternating current generator, frequency converter, the switch that DC voltage is 600V or more
The fields such as power supply, lighting circuit, Traction Drive.
In the prior art, typical three-level topology constitutes a phase bridge arm using 4 IGBT and two diodes, passes through control
It makes different IGBT and opens shutdown, to obtain different output voltages, load voltage appointing between three kinds of level may be implemented
Meaning switching.And it is in parallel by three three level phase circuits, three-phase tri-level topological structure is constituted, the topological structure is in photovoltaic, storage
The fields such as energy, wind-powered electricity generation are widely used.
Currently, engineer carries out the debugging of three level algorithms for convenience, experiment porch would generally be built in laboratory.
Existing experiment porch has platform and emulation platform two ways in kind.And the hardware system of the debugging platform of three level algorithms is whole
The body development cycle is long, but in order to develop the related software of three level algorithms, it is necessary to first complete whole three level debugging platform
Design.Existing three level debugging platform must include 12 road isolated drive circuit designs, IGBT protection circuit, module bus bar design
And bus capacitor design etc., the period so as to cause exploitation three level debugging platform is especially long, and dedicated isolation drive
The costs such as circuit design and module bus bar are higher, simultaneously because associated drives circuit is large number of, individually debug either circuit mould
The period of block is also longer, can seriously affect peopleware's progress.
In addition, the mating platform cost in kind with IGBT production is high, IGBT module, capacitor, stack bus bar and driving core
Equal all parts cost is all very high, if use for laboratory material object debugs platform to do initial stage algorithm, cost is very high.
Summary of the invention
The main object of the present invention is to provide a kind of IGBT analog device, it is intended to solve existing IGBT for initial stage algorithm
Debug the more expensive technical problem of platform cost.
To achieve the above object, the present invention provides a kind of IGBT analog device, and the IGBT analog device includes optical coupler
Part and first diode；
The anode of the light emitting diode of the optocoupler is the grid of IGBT, the light emitting diode of the optocoupler
Cathode is for being grounded；The collector of the optocoupler is connect with the cathode of the first diode, and connecting node is constituted
The drain electrode of IGBT；The emitter of the optocoupler is connect with the anode of the first diode, and described in connecting node composition
The source electrode of IGBT.
Preferably, the optocoupler pressure voltage is 70V-100V, current margin 50-100mA.
Preferably, the optocoupler is light coupling relay.
To achieve the above object, the present invention also provides a kind of level analog circuit, the level analog circuit includes power supply
Power supply, the first Voltage stabilizing module, the second Voltage stabilizing module, third Voltage stabilizing module, the 4th Voltage stabilizing module, the first afterflow module, second continue
Flow module, first control signal input terminal, second control signal input terminal, third control signal input, the 4th control signal
Input terminal and IGBT analog device as described above, the quantity of the IGBT analog device is four, and respectively first crystal
Tube device, second transistor device, third transistor device and the 4th transistor device, the power supply include the first output
End, second output terminal and third output end；
The input terminal of first Voltage stabilizing module is the first control signal input terminal of the level analog circuit, described the
The output end of one Voltage stabilizing module is connect with the controlled end of the first crystal tube device；
The input terminal of the first crystal tube device is connect with the first output end of the power supply, the first crystal
The output end of tube device is connect with the output end of the input terminal of the second transistor device, the first afterflow module；It is described
The controlled end of second transistor device is connect with the output end of second Voltage stabilizing module, the output of the second transistor device
End is connect with the output end of the third transistor device, the company of the second transistor device and the third transistor device
Connect the output end that node is the level analog circuit；The input terminal of second Voltage stabilizing module is the level analog circuit
Second control signal input terminal；The output end of the third transistor device input terminal with the 4th transistor device respectively
It is connected with the input terminal of the second afterflow module, the controlled end of the third transistor device and the third Voltage stabilizing module
Output end connection；The input terminal of the third Voltage stabilizing module is the third control signal input of the level analog circuit；
The controlled end of 4th transistor device is connect with the output end of the 4th Voltage stabilizing module, the 4th crystal
The output end of tube device is connect with the second output terminal of the power supply；The input terminal of 4th Voltage stabilizing module is the electricity
4th control signal input of flat analog circuit connects；The output end of the second afterflow module and the first afterflow module
Input terminal connection, the connecting node of the second afterflow module and the first afterflow module is the third of the power supply
Output end.
Preferably, the first afterflow module and the second afterflow module are one-way conduction diode.
Preferably, first Voltage stabilizing module, second Voltage stabilizing module, the third Voltage stabilizing module and described 4th steady
Die block is resistance.
Preferably, the first afterflow module and the second afterflow module are diode.
To achieve the above object, the present invention also provides a kind of three level emulation platforms, the three level emulation platform includes
Controller and level analog circuit as described above, the quantity of the level analog circuit are multiple, the level analog circuit
Multiple control signal input terminal connect respectively with the multiple control signal output end of the controller, the input terminal of the load
It is connect with power supply, the output end of the load is connect with the input terminal of the level analog circuit.
Preferably, the quantity of the level analog circuit is three.
Preferably, the three level emulation platforms further include multiple loads, and the load is for being connected to the power supply
It is described to load the second output terminal for being also used to be connected to the power supply between the first output end and second output terminal of power supply
Between third output end；The load is RC load or LC load.
A kind of IGBT analog device proposed by the present invention, the IGBT analog device include optocoupler and the one or two pole
Pipe, the anode of the light emitting diode of the optocoupler are the grid of IGBT, the cathode of the light emitting diode of the optocoupler
For being grounded.The collector of the optocoupler is connect with the cathode of the first diode, and connecting node constitutes IGBT's
Drain electrode, the emitter of the optocoupler is connect with the anode of the first diode, and connecting node constitutes the IGBT's
Source electrode.By above-mentioned connection, optocoupler and first diode constitute the structure of simulation IGBT, electric current and voltage therein with
And correlation properties are converted to be equal to when testing test and be tested using IGBT, and the simulation to IGBT function is realized, and
The compound full-control type voltage driven type power formed relative to BJT (double pole triode) and MOS (insulating gate type field effect tube)
For semiconductor devices, the present invention proposes that IGBT analog device can solve existing IGBT and debug platform cost for initial stage algorithm
More expensive problem, has saved development cost, has preferable experiment effect and economic value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the electrical block diagram of IGBT analog device of the invention；
Fig. 2 is the circuit diagram of level analog circuit of the invention；
Fig. 3 is the module diagram of three level emulation platforms of the invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
It to be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model
Within enclosing.
To solve the problems, such as that existing IGBT is more expensive for initial stage algorithm debugging platform cost, the present invention provides a kind of IGBT
Analog device.
In one embodiment, as shown in Figure 1, a kind of IGBT analog device includes the first optocoupler U1 and first diode
D1, the anode of the light emitting diode of the first optocoupler U1 are the grid G of IGBT, and the first optocoupler U1's shines
For being grounded, the collector of the first optocoupler U1 is connect the cathode of diode with the cathode of the first diode D1,
And connecting node constitutes the drain D of IGBT, the emitter of the first optocoupler U1 and the anode of the first diode D1
Connection, and connecting node constitutes the source S of the IGBT.
Wherein, the light emitting diode of the primary side of the first optocoupler U1 and secondary side electrical isolation, so that light emitting diode can
To avoid and specially use without being designed again using three level scheme Zhong of standard, 12 tunnel isolation drive as driving element
Isolation drive design bring cost of manufacture rises and needs the problem of specially carrying out electrical design.To realize that IGBT is simulated
The circuit structure of device is simple and convenient, and cost is relatively low.In addition, substituting IGBT with the anode of the light emitting diode of the optocoupler
Grid G, the optocoupler collector and the first diode D1 cathode connecting node constitute IGBT drain electrode
D, the connecting node of the anode of the emitter of the optocoupler and the first diode D1 constitutes the source S of the IGBT,
So that the fundamental characteristics of IGBT is retained, the Current Voltage of IGBT and the change of on state can be largely simulated
Change, the performance measured is similar with corresponding IGBT.And because of the characteristic of optocoupler, the grid G of IGBT and the source S of IGBT
Other means are increased without between drain D can be realized electrical isolation, simple and convenient, have good practicability.Work as needs
When measuring the performance of the IGBT of different parameters, it can be realized by selecting the parameter of optocoupler and diode, at this point, two poles
The pressure voltage of pipe needs the pressure voltage greater than optocoupler, to guarantee the safety and reliability of circuit.
Optionally, the optocoupler pressure voltage is 70V-100V, and current margin 50-100mA, this value range can
To realize preferable simulation effect.
Optionally, the optocoupler is light coupling relay, and the simulation of more high current and higher voltage may be implemented.
To achieve the above object, the present invention also provides a kind of level analog circuits, as shown in Fig. 2, the level analog is electric
Road includes power supply, the first Voltage stabilizing module, the second Voltage stabilizing module, third Voltage stabilizing module, the 4th Voltage stabilizing module, the first afterflow mould
Block, the second afterflow module, first control signal input terminal PWM1, second control signal input terminal PWM2, third control signal are defeated
Enter to hold PWM3, the 4th control signal input PWM4 and IGBT analog device as described above, the number of the IGBT analog device
Amount is four, and respectively first crystal tube device Q1, second transistor device Q2, third transistor device Q3 and the 4th crystal
Tube device Q4, the power supply include the first output end DC+IN, second output terminal DC0 and third output end DC-IN.It is described
The input terminal of first Voltage stabilizing module is the first control signal input terminal PWM1 of the level analog circuit, the first pressure stabilizing mould
The output end of block is connect with the controlled end of the first crystal tube device Q1.The input terminal of the first crystal tube device Q1 and institute
State the first output end DC+IN connection of power supply, the output end and the second transistor of the first crystal tube device Q1
The output end connection of the input terminal of device Q2, the first afterflow module.The controlled end of the second transistor device Q2 and institute
State the output end connection of the second Voltage stabilizing module, the output end of the second transistor device Q2 and the third transistor device Q3
Output end connection, the connecting node of the second transistor device Q2 and the third transistor device Q3 are the level mould
The output end of quasi- circuit.The input terminal of second Voltage stabilizing module is the second control signal input terminal of the level analog circuit
PWM2, the output end of the third transistor device Q3 input terminal and described second with the 4th transistor device Q4 respectively
The input terminal of afterflow module connects, and the controlled end of the third transistor device Q3 and the output end of the third Voltage stabilizing module connect
It connects.The input terminal of the third Voltage stabilizing module is the third control signal input PWM3 of the level analog circuit, described the
The controlled end of four transistor device Q4 is connect with the output end of the 4th Voltage stabilizing module, and the 4th transistor device Q4's is defeated
Outlet is connect with the second output terminal DC0 of the power supply, and the input terminal of the 4th Voltage stabilizing module is the level analog
4th control signal input PWM4 connection of circuit.The output end of the second afterflow module and the first afterflow module
The connecting node of input terminal connection, the second afterflow module and the first afterflow module is that the third of the power supply is defeated
Outlet DC-IN.
Wherein, the first Voltage stabilizing module, the second Voltage stabilizing module, third Voltage stabilizing module and the 4th Voltage stabilizing module are used to control to first
Signal input part PWM1 processed, second control signal input terminal PWM2, the control signal of third control signal input PWM3 and the 4th
The control signal of input terminal PWM4 input carries out pressure stabilizing, so that by the first Voltage stabilizing module, the second Voltage stabilizing module, third pressure stabilizing mould
The voltage stabilization of block and the 4th Voltage stabilizing module will not destroy first crystal tube device Q1, second transistor device Q2, third crystal
The performance and structure of tube device Q3 and the 4th transistor device Q4.In first crystal tube device Q1, second transistor device Q2,
Under the different on states of three transistor device Q3 and the 4th transistor device Q4, the first output end DC+IN of power supply,
Two output end DC0 and third output end DC-IN are through the first afterflow module and the second afterflow module, then using the first transistor
After device Q1, second transistor device Q2, third transistor device Q3 and the 4th transistor device Q4, relevant voltage is exported, because
For the first output end DC+IN, the second output terminal DC0 of power supply and three input terminals of third output end DC-IN, Yi Ji
The on state of one transistor device Q1, second transistor device Q2, third transistor device Q3 and the 4th transistor device Q4
Variation be specifically so that the output voltage of level analog circuit changes：
(1) when first crystal tube device Q1 and second transistor device Q2 is connected, third transistor device Q3 and the 4th is brilliant
Body tube device Q4 is disconnected, the first output of the first output end DC+IN and power supply of level analog circuit output power supply
Hold the voltage difference of DC+IN.
(2) when second transistor device Q2 and third transistor device Q3 is connected, first crystal tube device Q1 and the 4th is brilliant
Body tube device Q4 is disconnected, the second output terminal DC0 of level analog circuit output power supply and the third output end of power supply
The voltage difference of DC-IN.
(3) when third transistor device Q3 and the 4th transistor device Q4 is connected, first crystal tube device Q1 and second is brilliant
Body tube device Q2 is disconnected, the third output of the first output end DC+IN and power supply of level analog circuit output power supply
Hold the voltage difference of DC-IN.
In above-described embodiment, the selection output of multiple voltages is realized, there is good control output effect.Moreover, can
To be compatible with 3.3V, 5V, 15V control panel PWM output.Second transistor device Q2 includes the second optocoupler U2 and the second diode
D2, third transistor device Q3 include third optocoupler U3 and third diode D3, the 4th transistor device Q4 include the 4th
Optocoupler U3 and the 4th diode D3.
In addition, the level analog circuit includes IGBT analog device, i.e. first crystal tube device Q1, second transistor device
Q2, third transistor device Q3 and the 4th transistor device Q4.The working principle of the level analog circuit can refer to above-mentioned implementation
Example, details are not described herein.Naturally, since the level analog circuit of the present embodiment uses above-mentioned IGBT analog device
Technical solution, therefore the beneficial effect that level analog circuit has above-mentioned IGBT all.
Optionally, the first afterflow module and the second afterflow module are the 5th diode D5 and the 6th diode D6.It can
Choosing, the first afterflow module and the second afterflow module are one-way conduction diode.
Wherein, the afterflow effect of one-way conduction diode is preferable, substantially lossless, can select the Xiao Te of low conducting voltage
Based diode simulates IGBT freewheeling diode, and such diode current ability is much larger than the current capacity of optocoupler, so as to
To realize preferable simulation effect.
Optionally, first Voltage stabilizing module, second Voltage stabilizing module, the third Voltage stabilizing module and described 4th steady
Die block is respectively first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4.
Wherein, realize that the structure of voltage regulation result is simple using resistance, effect is preferable.Furthermore it is possible to realize compatible various electricity
The PWM of pressure controls (such as 3.3V/5V/15V), at this time, it is only necessary to change the first Voltage stabilizing module, second Voltage stabilizing module, described
The resistance of third Voltage stabilizing module can be realized, therefore can integrate various control different voltages, realize diversification control.
It is illustrated below in conjunction with Fig. 1,2 pairs of circuit theories of the invention：
Signal is controlled via first control signal input terminal PWM1, second control signal input terminal PWM2, third control letter
Number input terminal PWM3 and the 4th control signal input PWM4 flows separately through first resistor R1, second resistance R2,3rd resistor R3
With the 4th resistance R4, so as to control first crystal tube device Q1, second transistor device Q2, third transistor device respectively
The conducting of Q3 and the 4th transistor device Q4 and the state disconnected, the voltage gating of power supply is by first diode D1, the
Two diode D2, third diode D3, the 4th diode D4, the 5th diode D5 or the 6th diode D6, to realize not
With the output of voltage：
(1) when first crystal tube device Q1 and second transistor device Q2 is connected, third transistor device Q3 and the 4th is brilliant
Body tube device Q4 is disconnected, and the electric current of the first output end DC+IN of power supply flows through first crystal tube device Q1 and the second crystal
Tube device Q2, the second output terminal DC0 of power supply flow through first diode D1, the 5th diode D5 and second transistor device
Q2, the voltage difference of the first output end DC+IN and second output terminal DC0 of level analog circuit output power supply.
(2) when second transistor device Q2 and third transistor device Q3 is connected, first crystal tube device Q1 and the 4th is brilliant
Body tube device Q4 is disconnected, and the electric current of the second output terminal DC0 of power supply flows through the second diode D2, the 5th diode D5 and the
Two-transistor device Q2, the electric current of the third output end DC-IN of power supply flow through the 6th diode D6, the 4th diode D4 and
Third transistor device Q3, the electricity of the second output terminal DC0 and third output end DC-IN of level analog circuit output power supply
Pressure difference.
(3) when third transistor device Q3 and the 4th transistor device Q4 is connected, first crystal tube device Q1 and second is brilliant
Body tube device Q2 disconnect, the electric current of the first output end DC+IN of power supply flow through the 4th diode D4, third diode D3 and
The electric current of third transistor device Q3, the third output end DC-IN of power supply flow through the 6th diode D6, the 4th diode
D4, third transistor device Q3 and the 4th transistor device Q4, the first output end DC+ of level analog circuit output power supply
The voltage difference of IN and third output end DC-IN.
Above-mentioned level analog circuit, which can be exported, controls multiple transistor devices according to control signal, to realize level mould
The change of quasi- circuit output end voltage, the structure of realization is simple, has preferable technical effect.
To achieve the above object, the present invention also provides a kind of three level emulation platforms, as shown in figure 3, three level is imitative
True platform includes controller and level analog circuit as described above, and the quantity of the level analog circuit is multiple, the electricity
The multiple control signal input terminal of flat analog circuit is connect with the multiple control signal output end of the controller respectively, described negative
The input terminal of load is connect with power supply, and the output end of the load is connect with the input terminal of the level analog circuit.
The three level emulation platform includes level analog circuit.The working principle of the three level emulation platform can refer to above-mentioned
Embodiment, details are not described herein.Naturally, since the three level emulation platforms of the present embodiment use above-mentioned level analog
The technical solution of circuit, therefore the beneficial effect that three level emulation platforms have above-mentioned level analog circuit all.
It, can only be by Matlab or other are imitative because existing three level emulation platform can not carry out control program verification
True software carries out simple modelling simulating, verifying, can not control loop to control panel and PWM generating loop carry out it is actual
Verifying.And three level emulation platform effect it is related with the model accuracy of actual platform all parts, if select it is advanced
Producible program code Simulation System Platform, cost is high, at the same be also required to hardware support kit support, and use IGBT three
Level emulation platform cost is high, higher cost.So needing economical and practical, the preferable three level emulation platform of test effect
To substitute.In the present solution, by replacing IGBT using analog device so that no longer need in emulation platform using isolation architecture and
The high accessory of the costs such as dedicated mating stack bus bar, so as to reduction of expenditure, the structure in addition realized is simple, convenient for big
Area is promoted, and has preferable economic value.Optionally, the quantity of the level analog circuit in three level emulation platforms can be
It is multiple, it selects according to actual needs.
Optionally, the quantity of the level analog circuit is three, including the simulation of the first level analog circuit, second electrical level
Circuit and third level analog circuit.
Optionally, the three level emulation platforms further include multiple loads, and the load is for being connected to the power supply
Between the first output end DC+IN and second output terminal DC0 of power supply, described load is also used to be connected to the of the power supply
Between two output end DC0 and third output end DC-IN, the load is RC load or LC load.
Wherein, three level emulation platforms provide DC bus powered, general external highest DC bus-bar voltage by external
No more than the 60% of optocoupler pressure voltage.Load both ends can be used for testing the output of three level emulation platforms as a result, so negative
Load can connect RC load, such as the first load between the first output end DC+IN and second output terminal DC0 of power supply, power supply
The second load between the second output terminal DC0 and third output end DC-IN of power supply, the first load include first capacitor C1 and the
Five resistance R5, the second load includes the second capacitor C2 and the 6th resistance R6, if LC can be selected using high current light coupling relay
Load.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all in the present invention
Inventive concept under, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/be used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (10)
1. a kind of IGBT analog device, which is characterized in that the insulated gate bipolar transistor analog device includes optocoupler
And first diode；
The anode of the light emitting diode of the optocoupler is the grid of IGBT, the cathode of the light emitting diode of the optocoupler
For being grounded；The collector of the optocoupler is connect with the cathode of the first diode, and connecting node constitutes IGBT's
Drain electrode；The emitter of the optocoupler is connect with the anode of the first diode, and connecting node constitutes the IGBT's
Source electrode.
2. IGBT analog device as described in claim 1, which is characterized in that the optocoupler pressure voltage is 70V-100V,
Current margin is 50-100mA.
3. IGBT analog device as described in claim 1, which is characterized in that the optocoupler is light coupling relay.
4. a kind of level analog circuit, which is characterized in that the level analog circuit include power supply, the first Voltage stabilizing module,
Second Voltage stabilizing module, third Voltage stabilizing module, the 4th Voltage stabilizing module, the first afterflow module, the second afterflow module, first control signal
Input terminal, second control signal input terminal, third control signal input, the 4th control signal input and such as claim 1
To 3 described in any item IGBT analog devices, the quantity of the IGBT analog device is four, and respectively the first transistor device
Part, second transistor device, third transistor device and the 4th transistor device, the power supply include the first output end,
Second output terminal and third output end；
The input terminal of first Voltage stabilizing module is the first control signal input terminal of the level analog circuit, and described first is steady
The output end of die block is connect with the controlled end of the first crystal tube device；
The input terminal of the first crystal tube device is connect with the first output end of the power supply, the first transistor device
The output end of part is connect with the output end of the input terminal of the second transistor device, the first afterflow module；Described second
The controlled end of transistor device is connect with the output end of second Voltage stabilizing module, the output end of the second transistor device with
The output end of the third transistor device connects, the connection section of the second transistor device and the third transistor device
Point is the output end of the level analog circuit；The input terminal of second Voltage stabilizing module is the second of the level analog circuit
Control signal input；The output end of the third transistor device respectively with the input terminal of the 4th transistor device and institute
State the input terminal connection of the second afterflow module, the output of the controlled end of the third transistor device and the third Voltage stabilizing module
End connection；The input terminal of the third Voltage stabilizing module is the third control signal input of the level analog circuit；
The controlled end of 4th transistor device is connect with the output end of the 4th Voltage stabilizing module, the 4th transistors
The output end of part is connect with the second output terminal of the power supply；The input terminal of 4th Voltage stabilizing module is the level mould
The 4th control signal input connection of quasi- circuit；The output end of the second afterflow module is defeated with the first afterflow module
Enter end connection, the connecting node of the second afterflow module and the first afterflow module exports for the third of the power supply
End.
5. level analog circuit as claimed in claim 4, which is characterized in that the first afterflow module and the second afterflow module
For one-way conduction diode.
6. level analog circuit as claimed in claim 4, which is characterized in that first Voltage stabilizing module, second pressure stabilizing
Module, the third Voltage stabilizing module and the 4th Voltage stabilizing module are respectively resistance.
7. level analog circuit as claimed in claim 4, which is characterized in that the first afterflow module and the second afterflow module
For diode.
8. a kind of three level emulation platforms, which is characterized in that the three level emulation platform includes controller and such as claim 4
To 7 described in any item level analog circuits, the quantity of the level analog circuit be it is multiple, the level analog circuit it is more
A control signal input is connect with the multiple control signal output end of the controller respectively, the input terminal of the load and confession
Power supply connection, the output end of the load are connect with the input terminal of the level analog circuit.
9. three level emulation platform as claimed in claim 8, which is characterized in that the quantity of the level analog circuit is three
It is a.
10. three level emulation platform as claimed in claim 8, which is characterized in that the three level emulation platforms further include
Multiple loads, the load is for being connected between the first output end of the power supply and second output terminal, the load
It is also used to be connected between the second output terminal of the power supply and third output end；The load is RC load or LC
Load.
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