CN108418402A - A kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control method - Google Patents

A kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control method Download PDF

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Publication number
CN108418402A
CN108418402A CN201810092537.3A CN201810092537A CN108418402A CN 108418402 A CN108418402 A CN 108418402A CN 201810092537 A CN201810092537 A CN 201810092537A CN 108418402 A CN108418402 A CN 108418402A
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pulse
state
lth
igbt
saturation
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黄先进
昌登伟
游小杰
郑琼林
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Beijing Jiaotong University
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Beijing Jiaotong University
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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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The present invention relates to a kind of current thresholds of the Locomotive Converter using RC IGBT to move back saturation control method, including：Step 1, Single-phase PWM Rectifier input current is sampled, sample rate current is divided into [ILmax, ILth]、[‑ILth, ILth] and [ILth, ILmax] 3 sections；Step 2, judge the affiliated section of sample rate current；Step 3, the different sections belonging to sample rate current carry out difference to four road pwm pulse of Single-phase PWM Rectifier and move back saturated process；The difference moves back saturated process：In section [ILmax, ILth], saturated process, the 1st tunnel pulse and the 4th tunnel pulse daley are moved back in the 2nd tunnel pulse and the 3rd tunnel pulse；In section [ILth, ILmax], saturated process, the 2nd tunnel pulse and the 3rd tunnel pulse daley are moved back in the 1st tunnel pulse and the 4th tunnel pulse；In section [ILth, ILth] without any processing, it is directly exported as the pulse of normal four tunnel.The present invention improves Single-phase PWM Rectifier low-loss, high current tolerance, the characteristics such as high reliability in terms of device property plays and control strategy improves two.

Description

A kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control Method
Technical field
The present invention relates to the control method of Locomotive Converter, specifically a kind of locomotive tractions using RC-IGBT The current threshold of current transformer moves back saturation control method.
Background technology
In China's next generation's electric locomotive and the design of standard EMU, higher middle dc voltage is selected to become one kind Trend.The acquisition of electric locomotive 3600V medium voltages needs to set about from circuit topology and device property.Become using three level Device circuit is flowed, can realize 3600V middle dc voltages with the IGBT of 3300V or 4500V.This scheme is for device capacitance requirement It is low, the suitable device of selection that can be well-to-do.Three-level control principle can realize reduction harmonic wave, reduce the benefits such as filter parameter.Its Deficiency is that control is relative complex, and device count is more.It is straight among 3600V that two level current transformers need to use 6500V IGBT just to can be achieved Stream, device select face relatively narrow.For 6500V IGBT current tolerances generally in 300A-750A, through-current capability is low at present, needs IGBT more It is in parallel.The control of this scheme is simple, and design is convenient, and equally there is also the deficiencies more than number of devices.Utilize 6.5kV RC-IGBT (Reverse Conducting-Insulated Gate Bipolar Transistor, inverse conductivity type insulated gate bipolar crystal Pipe) high current tolerance, allow that working junction temperature is more preferable, the smaller advantage of equivalent thermal resistance, applied to Locomotive Converter In, the direct voltage output of 3600V can not only be met, and the loss of converter system is lower, reliability higher.
Traction current transformation system is become using the voltage-type traction of Single-phase PWM Rectifier cooperation three-phase PWM inverter composition Device is flowed, the control strategy of common Single-phase PWM Rectifier has very much, and RC-IGBT's moves back saturation control method greatly mostly from foreign countries, base Originally it is all based on single tube or half-bridge circuit is studied.High-power RC-IGBT is applied to the control of Single-phase PWM Rectifier Method processed is almost never investigated.
Based on the research of RC-IGBT single tubes, patent " conducting state of RC-IGBT detects " (publication number 102468837B), As shown in Figure 1, this patent is by taking half-bridge circuit as an example, the special gate drivers unit of major design, since RC-IGBT becomes anti- When to conducting state, the grid current caused by the voltage drop at load paths both ends can be changed, by the change for sensing grid current Change and is in forward conduction state or reverse-conducting state to detect RC-IGBT.Such method needs additional increase grid control On the one hand unit processed increases the difficulty and R＆D costs of RC-IGBT driving designs, although on the other hand being capable of accurate judgement RC-IGBT conducting states, but do not mention RC-IGBT and move back the specific applying method of saturation pulse.
Based on the research of RC-IGBT half-bridges, document (Daniel Domes, Infineon Technology AG, Max Planck Straβe 5,58581Warstein,Germany,Control Method for a Reverse Conducting IGBT, PCIM Europe 2015,19-21 May 2015) in teach RC-IGBT half-bridge circuit control methods in detail, such as scheme Shown in 2, ctrl HS (High-side control signal, high-end control signal) and ctrl LS (Low-side Control signal, the control signal of low side) it is respectively the input control signal that two-way drives, load current direction is to flow into Node direction, when detecting the rising edge of ctrl HS, upper tube RC-IGBT gate leves apply ﹣ 15V voltages, timing dead time tinterlock, then when detecting upper tube voltage drop VceFor low level when, upper tube RC-IGBT gate leves apply 0V voltages, then work as detection To ctrl HS failing edge when, saturation pulse duration t is moved back in upper tube RC-IGBT gate leve application+15V voltages, timingdesat, most Upper tube RC-IGBT gate leves apply ﹣ 15V voltages afterwards, and whole process down tube RC-IGBT only needs failing edge to postpone tinterlockTime is Can, it moves in circles later.Such method needs to redesign RC-IGBT drivings, wherein additional digital logic chip is needed, three electricity The design of jib door stage drive circuit is more increasingly complex than two level, drive current foldback circuit design may also with conventional drive Dynamic different, the realization of whole driving circuit is more difficult, and same cost can also increase.
Invention content
In view of the deficiencies in the prior art, it is led using the locomotive of RC-IGBT the purpose of the present invention is to provide a kind of The current threshold for drawing current transformer moves back saturation control method, is carried out using common PWM controller and the driving of common high-power IGBT Control, it is intended to promote Single-phase PWM Rectifier low-loss, high current tolerance, high reliability characteristic eliminates special high-power RC-IGBT drives, and is more suitable for requiring high-power and the lower application scenario of switching frequency.
To achieve the above objectives, the technical solution adopted by the present invention is that：
A kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control method, includes the following steps：
Step 1, Single-phase PWM Rectifier input current is sampled, sample rate current is divided into [- ILmax,-ILth]、[- ILth, ILth] and [ILth, ILmax] 3 sections；Wherein, ILmaxFor the peak value of inductive current, ILthFor input current threshold value；
The Single-phase PWM Rectifier includes 4 RC-IGBT switching tubes：T1、T2、T3And T4；
Step 2, judge the affiliated section of sample rate current；
Step 3, the different sections belonging to sample rate current carry out difference to four road pwm pulse of Single-phase PWM Rectifier and move back Saturated process；
The difference moves back saturated process：In section [- ILmax,-ILth], the 2nd tunnel pulse and the 3rd tunnel pulse are moved back full And processing, the 1st tunnel pulse and the 4th tunnel pulse daley；In section [ILth, ILmax], the 1st tunnel pulse and the 4th tunnel pulse are moved back at saturation Reason, the 2nd tunnel pulse and the 3rd tunnel pulse daley；In section [- ILth, ILth] without any processing, it is straight as the pulse of normal four tunnel Connect output.
Based on the above technical solution, using Hall or current sensor to the input current of Single-phase PWM Rectifier It is sampled.
Based on the above technical solution, the saturated process of moving back is by four road pwm pulse of input current threshold value pair The sequential logic for move back saturation is handled to complete, and is directed to delay time, system reaction time, is moved back saturation pulse and continue Time and the selection for latching the time：
Sample rate current is in section [ILth, ILmax], detect inputT2Rising edge, corresponding outputT1In tfreeTime Section is low, in tdesatPeriod is height, in tdesatIt is low, outputT always later2It is low always；Detect inputT simultaneously3's Rising edge, corresponding outputT4In tfreePeriod is low, in tdesatPeriod is height, in tdesatLater always be it is low, outputT3It is low always；
Sample rate current is in section [- ILmax,-ILth], detect inputT1Rising edge, corresponding outputT2In tfreeWhen Between section be it is low, in tdesatPeriod is height, in tdesatIt is low, outputT always later1It is low always；Detect inputT simultaneously4 Rising edge, corresponding outputT3In tfreePeriod is low, in tdesatPeriod is height, in tdesatLater always be it is low, outputT4It is low always；
Sample rate current is in section [- ILth, ILth], it is without any processing, it is directly exported as four common road pwm pulses；
The inputT1、inputT2、inputT3And inputT4Four tunnels with dead time respectively inputted are common Pwm signal, outputT1、outputT2、outputT3And outputT4Respectively four tunnels export pulse, ILFor input current, tdelayFor delay time, tfreeFor system reaction time, tdesatTo move back saturation pulse duration, tlockTo latch the time.
Based on the above technical solution, the Single-phase PWM Rectifier includes 8 work shapes in the case where moving back saturation control State：
State one, T2And T3Gate leve be high level, T1And T4Gate leve be low level, T2And T3It is IGBT patterns；
State two, T2Gate leve be high level, T1、T3And T4Gate leve be low level, T2For IGBT patterns, T4For diode Pattern；
State three, T3Gate leve be high level, T1、T2And T4Gate leve be low level, T1For diode mode, T3For IGBT Pattern；
State four, T1、T2、T3And T4Gate leve be low level, T1And T4It is diode mode；
State five, T1And T4Gate leve be high level, T2And T3Gate leve be low level, T1And T4It is IGBT patterns；
State six, T1Gate leve be high level, T2、T3And T4Gate leve be low level, T1For IGBT patterns, T3For diode Pattern；
State seven, T4Gate leve be high level, T1、T2And T3Gate leve be low level, T2For diode mode, T4For IGBT Pattern；
State eight, T1、T2、T3And T4Gate leve be low level, T2And T3It is diode mode.
Based on the above technical solution, the switching state of 8 working conditions is specially：
Three → state of state one：T2Open T1Reverse recovery, at this time T1Saturation pulse is moved back in application；
Four → state of state two：T2Open T1Reverse recovery, at this time T1Saturation pulse is moved back in application；
Two → state of state one：T3Open T4Reverse recovery, at this time T4Saturation pulse is moved back in application；
Four → state of state three：T3Open T4Reverse recovery, at this time T4Saturation pulse is moved back in application；
Seven → state of state five：T1Open T2Reverse recovery, at this time T2Saturation pulse is moved back in application；
Eight → state of state six：T1Open T2Reverse recovery, at this time T2Saturation pulse is moved back in application；
Six → state of state five：T4Open T3Reverse recovery, at this time T3Saturation pulse is moved back in application；
Eight → state of state seven：T4Open T3Reverse recovery, at this time T3Saturation pulse is moved back in application.
The current threshold of Locomotive Converter of the present invention using RC-IGBT moves back saturation control method, from device Part characteristic plays and control strategy improves two aspects and improves Single-phase PWM Rectifier low-loss, high current tolerance, high reliability Etc. characteristics.Consider the repeatability damage characteristic low with device low current near load current point, it is proposed that RC-IGBT is single-phase The load current of PWM rectifier, without moving back the thinking of saturated process, reduces the event for moving back saturation pulse triggering under low current Hinder risk, while the loss of high current operating mode is inhibited using saturation is moved back, improves the stability of converter system work.
The present invention is controlled using common PWM controller and the driving of common high-power IGBT, is eliminated special big Power RC-IGBT drivings, avoid many problems of RC-IGBT driving designs.During implementing due to this control method, need Tetra- road pwm pulses of Yao Dui are postponed, it is contemplated that the stability of system work is requiring high-power and low switching frequency Application scenario, suitable for moving back saturation control method using this kind of current threshold.
Description of the drawings
The present invention has following attached drawing：
Fig. 1 is the IGBT half-bridge circuit structural schematic diagrams for being connected to the load impedance including inductor；
Fig. 2 is that left figure is two-way gate leve input control signal and two-way output driving pulse letter in RC-IGBT half-bridge circuits Number comparison oscillogram, right figure is RC-IGBT half-bridge circuit schematic diagrames；
Fig. 3 is to move back saturation control flow chart under Single-phase PWM Rectifier traction working condition；
Fig. 4 is Single-phase PWM Rectifier modified predictive-current control block diagram；
Fig. 5 is that Single-phase PWM Rectifier inductive current threshold value moves back saturation control logic block diagram；
Fig. 6 is that the 1st, 2 tunnel pulse of Single-phase PWM Rectifier compares oscillogram before and after the processing.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
As illustrated in figures 3-6, the current threshold of the Locomotive Converter of the present invention using RC-IGBT moves back saturation Control method includes the following steps：
Step 1, Single-phase PWM Rectifier input current is sampled, sample rate current is divided into [ILth, ILmax]、[- ILmax,-ILth] and [- ILth, ILth] 3 sections；
Step 2, judge the affiliated section of sample rate current；
Step 3, the different sections belonging to sample rate current carry out difference to four road pwm pulse of Single-phase PWM Rectifier and move back Saturated process.
Based on the above technical solution, using Hall or current sensor to the input current of Single-phase PWM Rectifier It is sampled.
Table 1 give Single-phase PWM Rectifier under traction working condition 8 working conditions and mutual handoff procedure in move back saturation arteries and veins Punching applies logic, general control and moves back the lower four switching tubes gate leve pulse distribution situation of saturation control.Wherein " normal pulsed " table Show that four road pwm pulse of common PWM rectifier, " moving back saturation pulse " indicate that RC-IGBT PWM rectifiers are moving back saturation pulse control Tetra- road pwm pulses of Xia.For example No. 2 and No. 3 switching tube gate leves of " 0110 " expression are high level, No. 1 and No. 4 switching tube gate leves are Low level, " * " indicate four tunnel pulses of the common PWM rectifier normal variation at state switching point.It is in addition given in table each At a state switching, what RC-IGBT moved back saturation moves back saturation pulse logic, such as when " 3 → 1 " indicate to be switched to 1 from state 3, T2 Open T1Reverse recovery, at this time T1Saturation pulse is moved back in application.
Table 1
Fig. 3 gives and moves back saturation control flow under Single-phase PWM Rectifier traction working condition.Rectification work is represented in circular frame Pattern works alternatively process with power supply short circuit pattern；Inversion operating mode is represented in square box to work alternatively with power supply short circuit pattern Process, the letter in figure on arrow need to move back the device of saturation when representing operating mode switching, and respective switch pipe gate leve needs this moment Apply and moves back saturation pulse, basis for estimation inductive current direction and to the open-minded of pipe.The letter of digital ambient corresponds to this work The device of diode mode is under pattern, i.e. this process switching tube gate leve applies low level.Working condition 4 to 5 and work shape State 8 to 1 will appear inductive current zero crossing, that is, correspond to switching of the full-controlled device from diode mode to IGBT patterns, this process It not discusses herein.In addition Single-phase PWM Rectifier be in regeneration regime its move back saturation control process it is similar with traction working condition.
Fig. 4 gives the logic diagram of the modified predictive-current control of RC-IGBT PWM rectifiers.Wherein 1 table of module Show Common PWM Controller, uge-des1(t)~uge-des4(t) it is to move back tetra- road gate leve voltages of saturated process Hou, ε (t) is step letter Number, when electric current forward direction, ε [is(t)]=1；When electric current is reversed, ε [is(t)]=0, fdelayAnd fdesRespectively delay function and move back Saturated process function.
Fig. 5 is that Single-phase PWM Rectifier inductive current zero passage threshold value moves back saturation control logic block diagram.The wherein expression of module 1 changes Into type predictive-current control unit, saturation pulse control unit is moved back in the expression of module 2.Inductive current is divided into：[-ILmax,-ILth]、 [-ILth, ILth] and [ILth, ILmax] 3 sections, wherein ILmaxFor the peak value of inductive current, ILthFor threshold current.Section [- ILmax,-ILth], saturated process, the 1st tunnel pulse and the 4th tunnel pulse daley are moved back in the 2nd tunnel pulse and the 3rd tunnel pulse；In section [ILth, ILmax], saturated process, the 2nd tunnel pulse and the 3rd tunnel pulse daley are moved back in the 1st tunnel pulse and the 4th tunnel pulse；Section [- ILth, ILth] without any processing, it is directly exported as the pulse of normal four tunnel.
Fig. 6 is that the 1st, 2 tunnel pulse of Single-phase PWM Rectifier compares waveform before and after the processing.Wherein inputT1And inputT2It is defeated The two-way normal signal with dead time entered, in addition to this there are one input current IL, export as four road outputT1With outputT2.First determine whether input current ILSize and Orientation, work as ILFor forward direction and it is more than ILthWhen, first analyze T1Pipe and T2Pipe Pulse generate, due to this process T1Pipe is constantly in diode mode, therefore T1Pipe driving pulse need always be it is low, in addition to It needs to meet RC-IGBT and is in diode mode, gate leve needs to apply outside low level, also to generate and move back smaller two pole of saturation pulse The reverse recovery loss of pipe, this pulse need to detect inputT2Rising edge, then to inputT2It is last to move back saturated process To outputT1, while only needing inputT2Postpone tdelayTime can be obtained by outputT2；Similarly, T3Pipe and T4Pipe Pulse generation be then according to inputT3Delay and move back what saturated process obtained.Equally, work as ILFor reversely and more than ILthWhen, Also similar processing is done.Inductive current ILIn section [- ILth, ILth] when, it is without any processing, it is straight as four common tunnel pulses Connect output.
The key problem in technology point and point to be protected of the present invention：
(1) RC-IGBT is applied to Single-phase PWM Rectifier, in eight working conditions and mutual handoff procedure, four RC- IGBT gate leve pulse distribution situations.
(2) detection of input current and input current threshold value ILthSelection；
(3) sequential logic for by four road pwm pulse of current threshold pair move back saturation is handled, when being directed to delay Between, system reaction time, move back the saturation pulse duration and latch the time selection；
(4) 6.5kV RC-IGBT are applied to Locomotive Converter, moving back saturation control method using current threshold is promoted Single-phase PWM Rectifier low-loss, high current tolerance, high reliability characteristic.
The detection method of input current is generally detected using current sensor, and the present invention is no exception, but will Input current carries out converter system as unique criterion to move back the key problem in technology point that saturation control is the present invention.In addition, input Current threshold ILthSelection want the specific environment that parametric device is applied, and flow through the electric current of device, the specific formula of neither one It being capable of quantificational expression.Threshold current is not answered too small first, and otherwise threshold interval is too small, can not accurately separate apparent 3 sections The transition for moving back saturation pulse is caused to apply；Threshold current can not select too big, otherwise in a large period, RC-IGBT phases Saturation state is moved back to fewer being operated in, is unfavorable for the reduction of overall loss.It is typically chosen peak point current ILmaxIt is 10% left The right side is advisable.
Above-described, only the embodiment of the present invention is not limited to the scope of the present invention, i.e., every according to this hair Simple, equivalent changes and modifications, fall within the power of patent of the present invention made by claims and description of bright application The claimed range of profit.The content not being described in detail in this specification belongs to existing skill well known to professional and technical personnel in the field Art.
The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.

Claims (5)

1. a kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control method, it is characterised in that：Including Following steps：
Step 1, Single-phase PWM Rectifier input current is sampled, sample rate current is divided into [- ILmax,-ILth]、[-ILth, ILth] and [ILth, ILmax] 3 sections；Wherein, ILmaxFor the peak value of inductive current, ILthFor input current threshold value；
The Single-phase PWM Rectifier includes 4 RC-IGBT switching tubes：T1、T2、T3And T4；
Step 2, judge the affiliated section of sample rate current；
Step 3, the different sections belonging to sample rate current carry out difference to four road pwm pulse of Single-phase PWM Rectifier and move back saturation Processing；
The difference moves back saturated process：In section [- ILmax,-ILth], the 2nd tunnel pulse and the 3rd tunnel pulse are moved back at saturation Reason, the 1st tunnel pulse and the 4th tunnel pulse daley；In section [ILth, ILmax], saturated process is moved back in the 1st tunnel pulse and the 4th tunnel pulse, 2nd tunnel pulse and the 3rd tunnel pulse daley；In section [- ILth, ILth] without any processing, it is direct as the pulse of normal four tunnel Output.
2. saturation control method is moved back using the current threshold of the Locomotive Converter of RC-IGBT as described in claim 1, It is characterized in that：The input current of Single-phase PWM Rectifier is sampled using Hall or current sensor.
3. saturation control method is moved back using the current threshold of the Locomotive Converter of RC-IGBT as described in claim 1, It is characterized in that：The saturated process of moving back is by four road pwm pulse of input current threshold value pair move back at the sequential logic of saturation It manages and is directed to complete to delay time, system reaction time, moves back the saturation pulse duration and latch the selection of time：
Sample rate current is in section [ILth, ILmax], detect inputT2Rising edge, corresponding outputT1In tfreePeriod is It is low, in tdesatPeriod is height, in tdesatIt is low, outputT always later2It is low always；Detect inputT simultaneously3Rising Edge, corresponding outputT4In tfreePeriod is low, in tdesatPeriod is height, in tdesatLater always be it is low, outputT3It is low always；
Sample rate current is in section [- ILmax,-ILth], detect inputT1Rising edge, corresponding outputT2In tfreePeriod is It is low, in tdesatPeriod is height, in tdesatIt is low, outputT always later1It is low always；Detect inputT simultaneously4Rising Edge, corresponding outputT3In tfreePeriod is low, in tdesatPeriod is height, in tdesatLater always be it is low, outputT4It is low always；
Sample rate current is in section [- ILth, ILth], it is without any processing, it is directly exported as four common road pwm pulses；
The inputT1、inputT2、inputT3And inputT4The common PWM letters in four tunnels with dead time respectively inputted Number, outputT1、outputT2、outputT3And outputT4Respectively four tunnels export pulse, ILFor input current, tdelayFor Delay time, tfreeFor system reaction time, tdesatTo move back saturation pulse duration, tlockTo latch the time.
4. saturation control method is moved back using the current threshold of the Locomotive Converter of RC-IGBT as described in claim 1, It is characterized in that：The Single-phase PWM Rectifier includes 8 working conditions in the case where moving back saturation control：
State one, T2And T3Gate leve be high level, T1And T4Gate leve be low level, T2And T3It is IGBT patterns；
State two, T2Gate leve be high level, T1、T3And T4Gate leve be low level, T2For IGBT patterns, T4For diode die Formula；
State three, T3Gate leve be high level, T1、T2And T4Gate leve be low level, T1For diode mode, T3For IGBT moulds Formula；
State four, T1、T2、T3And T4Gate leve be low level, T1And T4It is diode mode；
State five, T1And T4Gate leve be high level, T2And T3Gate leve be low level, T1And T4It is IGBT patterns；
State six, T1Gate leve be high level, T2、T3And T4Gate leve be low level, T1For IGBT patterns, T3For diode die Formula；
State seven, T4Gate leve be high level, T1、T2And T3Gate leve be low level, T2For diode mode, T4For IGBT moulds Formula；
State eight, T1、T2、T3And T4Gate leve be low level, T2And T3It is diode mode.
5. saturation control method is moved back using the current threshold of the Locomotive Converter of RC-IGBT as claimed in claim 4, It is characterized in that：The switching state of 8 working conditions is specially：
Three → state of state one：T2Open T1Reverse recovery, at this time T1Saturation pulse is moved back in application；
Four → state of state two：T2Open T1Reverse recovery, at this time T1Saturation pulse is moved back in application；
Two → state of state one：T3Open T4Reverse recovery, at this time T4Saturation pulse is moved back in application；
Four → state of state three：T3Open T4Reverse recovery, at this time T4Saturation pulse is moved back in application；
Seven → state of state five：T1Open T2Reverse recovery, at this time T2Saturation pulse is moved back in application；
Eight → state of state six：T1Open T2Reverse recovery, at this time T2Saturation pulse is moved back in application；
Six → state of state five：T4Open T3Reverse recovery, at this time T3Saturation pulse is moved back in application；
Eight → state of state seven：T4Open T3Reverse recovery, at this time T3Saturation pulse is moved back in application.
CN201810092537.3A 2018-01-31 2018-01-31 A kind of current threshold of Locomotive Converter using RC-IGBT moves back saturation control method Withdrawn CN108418402A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109660142A (en) * 2019-03-04 2019-04-19 湖南大学 A kind of NPC current transformer drive control method using RC-IGBT
CN110224597A (en) * 2019-03-06 2019-09-10 湖南大学 A kind of drive control method of RC-IGBT type energy storage converter
CN113131511A (en) * 2020-01-16 2021-07-16 江苏和网源电气有限公司 IGBT device desaturation detection protection circuit control method

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Publication number Priority date Publication date Assignee Title
CN109660142A (en) * 2019-03-04 2019-04-19 湖南大学 A kind of NPC current transformer drive control method using RC-IGBT
CN110224597A (en) * 2019-03-06 2019-09-10 湖南大学 A kind of drive control method of RC-IGBT type energy storage converter
CN113131511A (en) * 2020-01-16 2021-07-16 江苏和网源电气有限公司 IGBT device desaturation detection protection circuit control method

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