CN104950238A - Fault detection method and fault detection device for current converter and IGBT drive circuit thereof - Google Patents

Fault detection method and fault detection device for current converter and IGBT drive circuit thereof Download PDF

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Publication number
CN104950238A
CN104950238A CN201410112673.6A CN201410112673A CN104950238A CN 104950238 A CN104950238 A CN 104950238A CN 201410112673 A CN201410112673 A CN 201410112673A CN 104950238 A CN104950238 A CN 104950238A
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China
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igbt
voltage
detection
drive circuit
magnitude
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CN201410112673.6A
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Chinese (zh)
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CN104950238B (en
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孙嘉品
张亚
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比亚迪股份有限公司
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Abstract

The invention discloses a fault detection method and a fault detection device for a current converter and an IGBT drive circuit used for the current converter. The fault detection method comprises the following steps: controlling to connect a direct-current voltage to an IGBT power output module, and controlling the on-off of the IGBT to enable the IGBT power output module to invert by a preset IGBT detection inversion voltage target value; before the attraction of an alternating-current contactor, detecting the front-end alternating-current voltage thereof to obtain a first detection voltage value; after the attraction of the alternating-current contactor, detecting the rear-end alternating-current voltage thereof to obtain a second detection voltage value; judging whether the IGBT drive circuit is in a fault state or not according to the preset IGBT detection inversion voltage target value, the first detection voltage value and the second detection voltage value. According to the fault detection method, the IGBT is detected without the need of adding external detection equipment, thus the cost is effectively saved, and the reliability is high; moreover, by detecting the alternating-current voltages of the alternating-current contactor for twice, the misjudgement of the IGBT detection is avoided.

Description

The fault detection method of transverter and IGBT drive circuit thereof and device
Technical field
The present invention relates to electric and electronic technical field, in particular to a kind of IGBT(Insulated Gate Bipolar Transistor for transverter, insulated gate bipolar transistor) fault detection method of driving circuit, for a failure detector for the IGBT drive circuit of transverter, and a kind of transverter.
Background technology
Along with the development of Power Electronic Technique, the transverter adopting IGBT to form is widely applied.Transverter in use will perform an important detecting step, to determine whether IGBT can normally work.
Correlation technique proposes a kind of proving installation for detecting IGBT, and this proving installation comprises housing and is arranged on the test circuit for detecting IGBT in housing, and determines that whether IGBT is normal by the PWM waveform of output resistor in proving installation.But the shortcoming that correlation technique exists needs to install utility appliance and proving installation additional, thus increase cost, and when utility appliance occurs abnormal, IGBT testing will be caused normally to carry out.
Summary of the invention
Object of the present invention is intended to solve above-mentioned technological deficiency at least to a certain extent.
For this reason, one object of the present invention is the fault detection method proposing a kind of IGBT drive circuit for transverter, without the need to detecting IGBT by increasing external checkout equipment, effectively cost-saving, and reliability is high.
Another object of the present invention is the failure detector proposing a kind of IGBT drive circuit for transverter.
Another object of the present invention is to propose a kind of transverter.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of fault detection method of the IGBT drive circuit for transverter, described transverter comprises IGBT power output module and A.C. contactor, the output terminal of described IGBT power output module connects the front end of described A.C. contactor, described fault detection method comprises the following steps: control DC voltage and access described IGBT power output module, and the IGBT break-make controlled in described IGBT power output module carries out inversion to make described IGBT power output module detect inverter voltage desired value with the IGBT preset, before described A.C. contactor adhesive, detect to obtain the first detection magnitude of voltage to the front end AC voltage of described A.C. contactor, after described A.C. contactor adhesive, detect to obtain the second detection magnitude of voltage to the rear end alternating voltage of described A.C. contactor, detect inverter voltage desired value according to described default IGBT, described first detection magnitude of voltage and described second detects magnitude of voltage and judges whether described IGBT drive circuit is in malfunction.
According to the fault detection method of the IGBT drive circuit for transverter that the embodiment of the present invention proposes, after DC voltage access IGBT power output module, control IGBT power output module detects inverter voltage desired value with the IGBT preset and carries out inversion, and before A.C. contactor adhesive, detect to obtain the first detection magnitude of voltage to the front end AC voltage of A.C. contactor, and after A.C. contactor adhesive, detect to obtain the second detection magnitude of voltage to the rear end alternating voltage of A.C. contactor, then inverter voltage desired value is detected according to the IGBT preset, first detection magnitude of voltage and second detects magnitude of voltage and judges whether IGBT drive circuit is in malfunction.Thus, this fault detection method carries out inversion by control IGBT power output module and the alternating voltage detecting the front-end and back-end of A.C. contactor determines that whether IGBT is normal, without the need to detecting IGBT by increasing external checkout equipment, effectively cost-saving, reliability is high, and IGBT drive circuit all detects IGBT before starting at every turn, thus guarantee that IGBT drive circuit can trouble free service.And, by detecting the alternating voltage of the front-end and back-end of A.C. contactor respectively, the erroneous judgement occurring causing because of detection failure can be avoided.
For achieving the above object, the failure detector of a kind of IGBT drive circuit for transverter that another aspect of the present invention embodiment proposes, comprise: the first alternating voltage detection module, described first alternating voltage detection module detects to obtain the first detection magnitude of voltage to the front end AC voltage of described A.C. contactor before being used for the A.C. contactor adhesive in described transverter, wherein, the output terminal of the IGBT power output module in described transverter connects the front end of described A.C. contactor, second alternating voltage detection module, described second alternating voltage detection module is used for detecting to obtain the second detection magnitude of voltage to the rear end alternating voltage of described A.C. contactor after described A.C. contactor adhesive, control module, described control module is connected with described second alternating voltage detection module with described first alternating voltage detection module, described control module controls DC voltage and accesses described IGBT power output module, and the IGBT break-make controlled in described IGBT power output module carries out inversion to make described IGBT power output module detect inverter voltage desired value with the IGBT preset, and detect inverter voltage desired value according to described default IGBT, described first detection magnitude of voltage and described second detects magnitude of voltage and judges whether described IGBT drive circuit is in malfunction.
According to the failure detector of the IGBT drive circuit for transverter that the embodiment of the present invention proposes, DC voltage access IGBT power output module is controlled by control module, and the IGBT break-make in control IGBT power output module carries out inversion to make IGBT power output module detect inverter voltage desired value with the IGBT preset, and detect magnitude of voltage judge whether IGBT drive circuit is in malfunction according to the IGBT detection inverter voltage desired value preset, the first detection magnitude of voltage and second.Thus, this failure detector directly carries out inversion by control module control IGBT power output module and the alternating voltage detecting the front-end and back-end of A.C. contactor determines that whether IGBT is normal, without the need to increasing external checkout equipment, effectively cost-saving, reliability is high, and IGBT drive circuit all detects IGBT before starting at every turn, thus guarantee that IGBT drive circuit can trouble free service.And, by detecting the alternating voltage of the front-end and back-end of A.C. contactor respectively, the erroneous judgement occurring causing because of the first alternating voltage detection module fault can be avoided.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of transverter, comprises the failure detector of the described IGBT drive circuit for transverter.
According to the transverter that the embodiment of the present invention proposes, can determine that whether IGBT is normal without the need to increasing external checkout equipment, thus effectively cost-saving, and reliability is high, and all IGBT detected before IGBT drive circuit starts at every turn, guarantee that IGBT drive circuit can trouble free service.And, by detecting the alternating voltage of the front-end and back-end of A.C. contactor respectively, the erroneous judgement occurring causing because of detection failure can be avoided.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the process flow diagram of the fault detection method of the IGBT drive circuit for transverter according to the embodiment of the present invention;
Fig. 2 is the process flow diagram of the fault detection method of the IGBT drive circuit for transverter according to the present invention's specific embodiment;
Fig. 3 is the block diagram of the failure detector of the IGBT drive circuit for transverter according to the embodiment of the present invention;
Fig. 4 is the block diagram of the transverter according to the embodiment of the present invention; And
Fig. 5 is the structural representation of transverter according to an embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
With reference to description below and accompanying drawing, these and other aspects of embodiments of the invention will be known.Describe at these and in accompanying drawing, specifically disclose some particular implementation in embodiments of the invention, representing some modes of the principle implementing embodiments of the invention, but should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
The transverter that proposes according to the embodiment of the present invention is described with reference to the accompanying drawings and for the fault detection method of the IGBT drive circuit of transverter and failure detector thereof.
Fig. 1 is the process flow diagram of the fault detection method of the IGBT drive circuit for transverter according to the embodiment of the present invention.Wherein, transverter comprises IGBT power output module and A.C. contactor, and the output terminal of IGBT power output module connects the front end of A.C. contactor, and as shown in Figure 1, this fault detection method being used for the IGBT drive circuit of transverter comprises the following steps:
S1: control DC voltage access IGBT power output module, and the IGBT break-make in control IGBT power output module carries out inversion to make IGBT power output module detect inverter voltage desired value with the IGBT preset.
That is, first confirm that the DC side of IGBT power output module accesses DC voltage, the i.e. D.C. contactor adhesive of control IGBT power output module front end connection, afterwards, control IGBT break-make also makes IGBT power output module detect inverter voltage desired value U with the IGBT preset checkcarry out inversion.
S2: before A.C. contactor adhesive, detects to obtain the first detection magnitude of voltage to the front end AC voltage of A.C. contactor.
That is, carry out first time and detect, control D.C. contactor adhesive, A.C. contactor disconnects, now the ac voltage signal of A.C. contactor front end is detected, to obtain the first detection magnitude of voltage U inv.
S3: after A.C. contactor adhesive, detects to obtain the second detection magnitude of voltage to the rear end alternating voltage of A.C. contactor.
That is, carry out second time and detect, control D.C. contactor and the equal adhesive of A.C. contactor, now the ac voltage signal of A.C. contactor rear end is detected, to obtain the second detection magnitude of voltage U grid.
S4: detect inverter voltage desired value, the first detection magnitude of voltage and the second detection magnitude of voltage according to the IGBT preset and judge whether IGBT drive circuit is in malfunction.
Particularly, in one embodiment of the invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be greater than default detection threshold U difand the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with second gridthe absolute value of difference be greater than default detection threshold U diftime, judge that IGBT drive circuit is in malfunction.
That is, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two greater than default detection threshold U dif, i.e. abs(U inv-U check) >U dif, then carry out second time and detect, prevent owing to detecting the first detection magnitude of voltage U invdetecting unit lost efficacy and the erroneous judgement that causes, control A.C. contactor adhesive when second time detects and proceed to detect, and after the adhesive of control A.C. contactor, detect magnitude of voltage U by detect from A.C. contactor rear end second gridreplace U invjudge, if abs(U grid-U check) >U dif, then judge that abnormal cannot normally work appears in the IGBT drive circuit of transverter.
Particularly, in another embodiment of the present invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be less than or equal to default detection threshold U diftime, judge that IGBT drive circuit is in normal operating conditions.
That is, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two less than or equal to default detection threshold U dif, i.e. abs(U inv-U check)≤U dif, then IGBT detects and passes through, and IGBT drive circuit is without exception normally to work.Like this, after IGBT has detected, stop the control of IGBT switch on and off and disconnect A.C. contactor, waiting pending subsequent control instruction.
Particularly, in yet another embodiment of the present invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be greater than default detection threshold U difand the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with second gridthe absolute value of difference be less than or equal to default detection threshold U diftime, judge that IGBT drive circuit is in normal operating conditions.
That is, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two greater than default detection threshold U dif, i.e. abs(U inv-U check) >U dif, then carry out second time and detect, prevent owing to detecting the first detection magnitude of voltage U invdetecting unit lost efficacy and the erroneous judgement that causes, control A.C. contactor adhesive when second time detects and proceed to detect, and after the adhesive of control A.C. contactor, detect magnitude of voltage U by from detect second of A.C. contactor rear end gridreplace U invjudge, if abs(U grid-U check)≤U dif, then IGBT detects and passes through, and IGBT drive circuit is without exception normally to work, but judges that detection first detects magnitude of voltage U invdetecting unit occur abnormal.Like this, after IGBT has detected, stop the control of IGBT switch on and off and disconnect A.C. contactor, waiting pending subsequent control instruction.
Thus, before IGBT drive circuit starts, all the IGBT in IGBT power output module is detected at every turn, can confirm whether IGBT can normally work.
In one particular embodiment of the present invention, as shown in Figure 2, the fault detection method for the IGBT drive circuit of transverter specifically comprises the following steps:
S101: control D.C. contactor adhesive and make DC voltage access IGBT power output module.
IGBT switch on and off in S102: control IGBT power output module detects inverter voltage desired value U to make IGBT power output module with the IGBT preset checkcarry out inversion.
S103: detect to obtain the first detection magnitude of voltage U to the front end AC voltage of A.C. contactor inv, judge that first detects magnitude of voltage U invinverter voltage desired value U is detected with the IGBT preset checkbetween the absolute value of difference whether be less than or equal to default detection threshold U dif.If so, then step S104 is performed; If not, then step S106 is performed.
S104:IGBT detects and passes through.
Namely say, if abs(U inv-U check)≤U dif, then IGBT drive circuit is without exception can normally work.
S105:IGBT has detected, and stops inversion.Namely stop the control to IGBT switch on and off, and disconnect A.C. contactor, wait pending subsequent control instruction.
S106: control A.C. contactor adhesive, carries out second time and detects.
S107: detect to obtain the second detection magnitude of voltage U to the rear end alternating voltage of A.C. contactor grid, judge that second detects magnitude of voltage U gridinverter voltage desired value U is detected with the IGBT preset checkbetween the absolute value of difference whether be less than or equal to default detection threshold U dif.If so, then step S108 is performed; If not, then step S110 is performed.
S108:IGBT detects and passes through.
Namely say, if abs(U grid-U check)≤U dif, then IGBT drive circuit is without exception can normally work.
S109: disconnect A.C. contactor, performs step S105.
S110:IGBT detects and does not pass through, and performs step S109.I.e. abs(U grid-U check) >U dif, then IGBT detects and does not pass through, and abnormal cannot normally work appears in IGBT drive circuit.
According to the fault detection method of the IGBT drive circuit for transverter that the embodiment of the present invention proposes, after DC voltage access IGBT power output module, control IGBT power output module detects inverter voltage desired value with the IGBT preset and carries out inversion, and before A.C. contactor adhesive, detect to obtain the first detection magnitude of voltage to the front end AC voltage of A.C. contactor, and after A.C. contactor adhesive, detect to obtain the second detection magnitude of voltage to the rear end alternating voltage of A.C. contactor, then inverter voltage desired value is detected according to the IGBT preset, first detection magnitude of voltage and second detects magnitude of voltage and judges whether IGBT drive circuit is in malfunction.Thus, this fault detection method carries out inversion by control IGBT power output module and the alternating voltage detecting the front-end and back-end of A.C. contactor determines that whether IGBT is normal, without the need to detecting IGBT by increasing external checkout equipment, effectively cost-saving, reliability is high, and IGBT drive circuit all detects IGBT before starting at every turn, thus guarantee that IGBT drive circuit can trouble free service.And, by detecting the alternating voltage of the front-end and back-end of A.C. contactor respectively, the erroneous judgement occurring causing because of detection failure can be avoided.
Fig. 3 is the block diagram of the failure detector of the IGBT drive circuit for transverter according to the embodiment of the present invention.As shown in Figure 3, this failure detector 100 being used for the IGBT drive circuit of transverter comprises: the first alternating voltage detection module 10, second alternating voltage detection module 20, control module 30.
Particularly, as shown in Figure 3, the first alternating voltage detection module 10 is for detecting to obtain the first detection magnitude of voltage U to the front end AC voltage of A.C. contactor 40 before A.C. contactor 40 adhesive in transverter inv, wherein, the output terminal of the IGBT power output module 50 in transverter connects the front end of A.C. contactor 40.Second alternating voltage detection module 20 for detecting to obtain the second detection magnitude of voltage U to the rear end alternating voltage of A.C. contactor 40 after A.C. contactor 40 adhesive grid.
As shown in Figure 3, control module 30 is connected with the second alternating voltage detection module 20 with the first alternating voltage detection module 10, control module 30 controls DC voltage access IGBT power output module 50, and the IGBT break-make in control IGBT power output module 50 detects inverter voltage desired value U to make IGBT power output module 50 with the IGBT preset checkcarry out inversion, and detect inverter voltage desired value U according to the IGBT preset check, first detect magnitude of voltage and second and detect magnitude of voltage U gridjudge whether IGBT drive circuit is in malfunction.
Specifically, IGBT power output module 50 is connected with direct voltage source by D.C. contactor, and be connected with electrical network with AC circuit breaker by A.C. contactor 40, like this, the D.C. contactor adhesive that control module 30 control IGBT power output module front end connects, thus the DC voltage access IGBT power output module 50 that control direct voltage source provides.Like this, after DC voltage access IGBT power output module 50, the front end AC voltage of the first alternating voltage detection module 10 pairs of A.C. contactors 40 detects, and the first detection magnitude of voltage U will be detected invbe sent to control module 30 to process, and after A.C. contactor 40 adhesive, the rear end alternating voltage of the second alternating voltage detection module 20 pairs of A.C. contactors 40 detects, and the second detection magnitude of voltage U will be detected gridbe sent to control module 30 to process, afterwards, control module 30 control IGBT break-make also makes IGBT power output module detect inverter voltage desired value U with the IGBT preset checkcarry out inversion, and detect magnitude of voltage U according to receive from the first alternating voltage detection module 10 and the second alternating voltage detection module 20 first invmagnitude of voltage U is detected with second griddetect to judge whether IGBT drive circuit is in malfunction to IGBT.
Particularly, in one embodiment of the invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be greater than default detection threshold U difand the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with second gridthe absolute value of difference be greater than default detection threshold U diftime, control module 30 judges that IGBT drive circuit is in malfunction.
That is, what control module 30 received from the first alternating voltage detection module 10 and the second alternating voltage detection module 20 first detects magnitude of voltage U invmagnitude of voltage U is detected with second gridafter, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two greater than default detection threshold U dif, i.e. abs(U inv-U check) >U difthen control module 30 controls A.C. contactor 40 adhesive, carries out second time and detects, prevent the erroneous judgement caused because the first alternating voltage detection module 10 lost efficacy, after A.C. contactor 40 adhesive, detect magnitude of voltage U by detect from A.C. contactor 40 rear end second gridreplace U invjudge, if abs(U grid-U check) >U dif, then control module 30 judges that abnormal cannot normally work appears in the IGBT drive circuit of transverter.
Particularly, in another embodiment of the present invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be less than or equal to default detection threshold U diftime, control module 30 judges that IGBT drive circuit is in normal operating conditions.
That is, what control module 30 received from the first alternating voltage detection module 10 first detects magnitude of voltage U invafter, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two less than or equal to default detection threshold U dif, i.e. abs(U inv-U check)≤U dif, then control module 30 judges that IGBT detection is passed through, and IGBT drive circuit is without exception normally to work.Like this, after IGBT has detected, control module 30 stops carrying out inversion control to IGBT switch on and off and controls A.C. contactor disconnecting, the pending subsequent control instruction such as IGBT drive circuit.
Particularly, in yet another embodiment of the present invention, when the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with first invthe absolute value of difference be greater than default detection threshold U difand the IGBT preset detects inverter voltage desired value U checkmagnitude of voltage U is detected with second gridthe absolute value of difference be less than or equal to default detection threshold U diftime, control module 30 judges that IGBT drive circuit is in normal operating conditions.
That is, what control module 30 received from the first alternating voltage detection module 10 and the second alternating voltage detection module 20 first detects magnitude of voltage U invmagnitude of voltage U is detected with second gridafter, calculate first and detect magnitude of voltage U invinverter voltage desired value U is detected with IGBT checkbetween difference, if the absolute value of difference is between the two greater than default detection threshold U dif, i.e. abs(U inv-U check) >U difthen control module 30 controls A.C. contactor 40 adhesive, carries out second time and detects, prevent the erroneous judgement caused because the first alternating voltage detection module lost efficacy, after control module 30 controls A.C. contactor 40 adhesive, detect magnitude of voltage U by detect from A.C. contactor 40 rear end second gridreplace U invjudge, if abs(U grid-U check)≤U dif, then control module 30 judges that IGBT detection is passed through, and IGBT drive circuit is without exception normally to work, but control module 30 judges that exception appears in the first alternating voltage detection module 10.Like this, after IGBT has detected, control module 30 stops carrying out inversion control to IGBT switch on and off and controls A.C. contactor disconnecting, the pending subsequent control instruction such as IGBT drive circuit.
Thus, before IGBT drive circuit starts, all the IGBT in IGBT power output module 50 is detected at every turn, and then confirm whether IGBT can normally work.
Generally speaking, A.C. contactor 40 front-end and back-end of IGBT power output module 50 AC are respectively equipped with ac voltage signal detecting unit, i.e. the first alternating voltage detection module 10 and the second alternating voltage detection module 20, and by ac voltage signal U that these two ac voltage signal detecting units detect invand U gridthe control module 30 of giving IGBT drive circuit after AD sampling processes, for according to U invand U griddetect IGBT whether can normally work.
To sum up, according to the failure detector of the IGBT drive circuit for transverter that the embodiment of the present invention proposes, DC voltage access IGBT power output module is controlled by control module, and the IGBT break-make in control IGBT power output module carries out inversion to make IGBT power output module detect inverter voltage desired value with the IGBT preset, and detect magnitude of voltage judge whether IGBT drive circuit is in malfunction according to the IGBT detection inverter voltage desired value preset, the first detection magnitude of voltage and second.Thus, this failure detector directly carries out inversion by control module control IGBT power output module and the alternating voltage detecting the front-end and back-end of A.C. contactor determines that whether IGBT is normal, without the need to increasing external checkout equipment, effectively cost-saving, reliability is high, and IGBT drive circuit all detects IGBT before starting at every turn, thus guarantee that IGBT drive circuit can trouble free service.And, by detecting the alternating voltage of the front-end and back-end of A.C. contactor respectively, the erroneous judgement occurring causing because of detection failure can be avoided.
Fig. 4 is the block diagram of the transverter according to the embodiment of the present invention.As shown in Figure 4, transverter 200 comprises the failure detector 100 of the above-mentioned IGBT drive circuit for transverter.
In one embodiment of the invention, as shown in Figure 5, transverter 200 also can comprise D.C. contactor 60 and AC circuit breaker 70.Be connected with direct voltage source 80 by D.C. contactor 60 for the IGBT power output module 50 in the failure detector 100 of the IGBT drive circuit of transverter, and be connected with electrical network 90 with AC circuit breaker 70 by A.C. contactor 40, like this, after D.C. contactor 60 adhesive, the DC voltage that direct voltage source 80 provides can be linked into IGBT power output module 50, and the failure detector 100 for the IGBT drive circuit of transverter starts to detect IGBT to determine whether IGBT is in malfunction.
According to the transverter that the embodiment of the present invention proposes, can determine that whether IGBT is normal without the need to increasing external checkout equipment, thus effectively cost-saving, and reliability is high, and all IGBT detected before IGBT drive circuit starts at every turn, guarantee that IGBT drive circuit can trouble free service.And, detected the alternating voltage of A.C. contactor by twice, can avoid occurring that IGBT detects erroneous judgement.
Describe and can be understood in process flow diagram or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this instructions, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random-access memory (ram), ROM (read-only memory) (ROM), erasablely edit ROM (read-only memory) (EPROM or flash memory), fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanning to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.

Claims (9)

1. the fault detection method for the IGBT drive circuit of transverter, it is characterized in that, described transverter comprises IGBT power output module and A.C. contactor, the output terminal of described IGBT power output module connects the front end of described A.C. contactor, and described fault detection method comprises the following steps:
Control DC voltage and access described IGBT power output module, and the IGBT break-make controlled in described IGBT power output module carries out inversion to make described IGBT power output module detect inverter voltage desired value with the IGBT preset;
Before described A.C. contactor adhesive, detect to obtain the first detection magnitude of voltage to the front end AC voltage of described A.C. contactor;
After described A.C. contactor adhesive, detect to obtain the second detection magnitude of voltage to the rear end alternating voltage of described A.C. contactor; And
Detect inverter voltage desired value according to described default IGBT, described first detection magnitude of voltage and described second detects magnitude of voltage and judges whether described IGBT drive circuit is in malfunction.
2. as claimed in claim 1 for the fault detection method of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detect inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage be greater than default detection threshold and described default IGBT detect inverter voltage desired value and the described second absolute value detecting the difference of magnitude of voltage be greater than described default detection threshold time, judge that described IGBT drive circuit is in described malfunction.
3. as claimed in claim 2 for the fault detection method of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detects inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage is less than or equal to described default detection threshold, judge that described IGBT drive circuit is in normal operating conditions.
4. as claimed in claim 2 for the fault detection method of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detect inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage be greater than described default detection threshold and described default IGBT detect inverter voltage desired value and the described second absolute value detecting the difference of magnitude of voltage be less than or equal to described default detection threshold time, judge that described IGBT drive circuit is in normal operating conditions.
5. for a failure detector for the IGBT drive circuit of transverter, it is characterized in that, comprising:
First alternating voltage detection module, described first alternating voltage detection module detects to obtain the first detection magnitude of voltage to the front end AC voltage of described A.C. contactor before being used for the A.C. contactor adhesive in described transverter, wherein, the output terminal of the IGBT power output module in described transverter connects the front end of described A.C. contactor;
Second alternating voltage detection module, described second alternating voltage detection module is used for detecting to obtain the second detection magnitude of voltage to the rear end alternating voltage of described A.C. contactor after described A.C. contactor adhesive;
Control module, described control module is connected with described second alternating voltage detection module with described first alternating voltage detection module, described control module controls DC voltage and accesses described IGBT power output module, and the IGBT break-make controlled in described IGBT power output module carries out inversion to make described IGBT power output module detect inverter voltage desired value with the IGBT preset, and detect inverter voltage desired value according to described default IGBT, described first detection magnitude of voltage and described second detects magnitude of voltage and judges whether described IGBT drive circuit is in malfunction.
6. as claimed in claim 5 for the failure detector of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detect inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage be greater than default detection threshold and described default IGBT detect inverter voltage desired value and the described second absolute value detecting the difference of magnitude of voltage be greater than described default detection threshold time, described control module judges that described IGBT drive circuit is in described malfunction.
7. as claimed in claim 6 for the failure detector of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detects inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage is less than or equal to described default detection threshold, described control module judges that described IGBT drive circuit is in normal operating conditions.
8. as claimed in claim 6 for the failure detector of the IGBT drive circuit of transverter, it is characterized in that, when described default IGBT detect inverter voltage desired value and the described first absolute value detecting the difference of magnitude of voltage be greater than described default detection threshold and described default IGBT detect inverter voltage desired value and the described second absolute value detecting the difference of magnitude of voltage be less than or equal to described default detection threshold time, described control module judges that described IGBT drive circuit is in normal operating conditions.
9. a transverter, is characterized in that, comprises the failure detector of the IGBT drive circuit for transverter according to any one of claim 5-8.
CN201410112673.6A 2014-03-24 2014-03-24 The fault detection method and device of transverter and its IGBT drive circuit CN104950238B (en)

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