CN103944436A - Three-phase fault-tolerant inverter circuit and control method thereof - Google Patents

Three-phase fault-tolerant inverter circuit and control method thereof Download PDF

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CN103944436A
CN103944436A CN201410206324.0A CN201410206324A CN103944436A CN 103944436 A CN103944436 A CN 103944436A CN 201410206324 A CN201410206324 A CN 201410206324A CN 103944436 A CN103944436 A CN 103944436A
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brachium pontis
igbt
inverter bridge
bipolar transistor
bridge leg
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CN103944436B (en
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贺虎成
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Xian University of Science and Technology
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Xian University of Science and Technology
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Abstract

The invention discloses a three-phase fault-tolerant inverter circuit and a control method thereof. The three-phase fault-tolerant inverter circuit comprises a direct current power supply and an inverter bridge, the upper bridge arm of a first inverter bridge arm is connected with a high-speed fuse F1 while the lower bridge arm is connected with a high-speed fuse F4, the upper bridge arm of a second inverter bridge arm is connected with a high-speed fuse F3 while the lower bridge arm is connected with a high-speed fuse F6, and the upper bridge arm of a third inverter bridge arm is connected with a high-speed fuse F5 while the lower bridge arm is connected with a high-speed fuse F2; an auxiliary inverter circuit is connected between the direct current power supply and the inverter bridge and is composed of an auxiliary upper bridge arm insulated gate bipolar transistor Q7, an auxiliary lower bridge arm insulated gate bipolar transistor A8, an auxiliary first inverter bridge arm insulated gate bipolar transistor S1, an auxiliary second inverter bridge arm insulated gate bipolar transistor S2, an auxiliary third inverter bridge arm insulated gate bipolar transistor S3 and single-phase bridge rectifiers Z1, Z2 and Z3. The three-phase fault-tolerant inverter circuit and the control method thereof realize to isolate the fault of the bridge arm with short circuit or open circuit fault and have good fault-tolerant running function.

Description

The fault-tolerant inverter circuit of a kind of three-phase and control method thereof
Technical field
The invention belongs to inverter technology field, be specifically related to the fault-tolerant inverter circuit of a kind of three-phase and control method thereof.
Background technology
Inverter is for being transformed into AC energy by direct current energy, and according to the difference of DC side power supply natures, inverter is divided into current source inverter and voltage source inverter.Voltage source inverter due to simple in structure, control the plurality of advantages such as flexible, be widely applied, yet power electronic device is wherein the weak link the most easily breaking down, its integrity problem is never effectively solved.Three-phase inverter adopts the three-phase bridge type inverse structure of standard conventionally, it does not have failure tolerant ability, people for improve the reliability of inverter conventionally take element derate with or the method such as parallel redundancy element design inverter, but these two kinds of methods for designing can make system cost too high, volume weight increases, pursuing low-cost and the limited application scenario of installing space, the integrity problem of inverter is still very outstanding.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of simple in structure, realization convenience is provided, short trouble can be converted to open fault, realized the Fault Isolation of short trouble or open fault place brachium pontis, avoid the generation of secondary failure, there is the fault-tolerant inverter circuit of three-phase of good fault-tolerant operation function.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the fault-tolerant inverter circuit of a kind of three-phase, comprise DC power supply and under the control of control circuit externally by the inverter bridge of converting direct-current power into alternating-current power, described inverter bridge is comprised of the first inverter bridge leg, the second inverter bridge leg and the 3rd inverter bridge leg, is connected with brachium pontis igbt Q on first on the upper brachium pontis of described the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with brachium pontis igbt Q first time 4, the first output that the upper brachium pontis of described the first inverter bridge leg and the link of lower brachium pontis are inverter bridge, is connected with brachium pontis igbt Q on second on the upper brachium pontis of described the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with brachium pontis igbt Q second time 6, the second output that the upper brachium pontis of described the second inverter bridge leg and the link of lower brachium pontis are inverter bridge, is connected with brachium pontis igbt Q on the 3rd on the upper brachium pontis of described the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with brachium pontis igbt Q the 3rd time 2, the 3rd output that the upper brachium pontis of described the 3rd inverter bridge leg and the link of lower brachium pontis are inverter bridge; It is characterized in that: on the upper brachium pontis of described the first inverter bridge leg, be connected with first on brachium pontis igbt Q 1series connection and for by brachium pontis igbt Q on first 1short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with and first time brachium pontis igbt Q 4series connection and for by first time brachium pontis igbt Q 4short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the first inverter bridge leg 4, on the upper brachium pontis of described the second inverter bridge leg, be connected with second on brachium pontis igbt Q 3series connection and for by brachium pontis igbt Q on second 3short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with and second time brachium pontis igbt Q 6be in series with for by second time brachium pontis igbt Q 6short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the second inverter bridge leg 6, on the upper brachium pontis of described the 3rd inverter bridge leg, be connected with the 3rd on brachium pontis igbt Q 5series connection and for by brachium pontis igbt Q on the 3rd 5short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with and the 3rd time brachium pontis igbt Q 2series connection and for by the 3rd time brachium pontis igbt Q 2short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the 3rd inverter bridge leg 2; Between described DC power supply and inverter bridge, be connected with the inversion auxiliary circuit that makes inverter bridge fault-tolerant operation under the control for control circuit externally, described inversion auxiliary circuit is by upper brachium pontis supplementary insulation grid bipolar transistor Q 7, lower brachium pontis supplementary insulation grid bipolar transistor Q 8, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1, the second inverter bridge leg supplementary insulation grid bipolar transistor S 2with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, and single-phase rectification bridge Z 1, single-phase rectification bridge Z 2with single-phase rectification bridge Z 3form; Described upper brachium pontis supplementary insulation grid bipolar transistor Q 7collector electrode and the positive pole of DC power supply join, described upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8collector electrode join, described lower brachium pontis supplementary insulation grid bipolar transistor Q 8emitter and the negative pole of DC power supply join, described single-phase rectification bridge Z 1an ac input end, single-phase rectification bridge Z 2ac input end and single-phase rectification bridge Z 3an ac input end all with upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8the link of collector electrode join, described single-phase rectification bridge Z 1another ac input end and the first output of inverter bridge join, described single-phase rectification bridge Z 2another ac input end and the second output of inverter bridge join, described single-phase rectification bridge Z 3another ac input end and the 3rd output of inverter bridge join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1collector electrode and single-phase rectification bridge Z 1cathode output end join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1emitter and single-phase rectification bridge Z 1cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2collector electrode and single-phase rectification bridge Z 2cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2emitter and single-phase rectification bridge Z 2cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3collector electrode and single-phase rectification bridge Z 3cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3emitter and single-phase rectification bridge Z 3cathode output end join.
The above-mentioned fault-tolerant inverter circuit of a kind of three-phase, is characterized in that: brachium pontis igbt Q on described first 1by antiparallel igbt and diode form described first time brachium pontis igbt Q 4by antiparallel igbt and diode form brachium pontis igbt Q on described second 3by antiparallel igbt and diode form described second time brachium pontis igbt Q 6by antiparallel igbt and diode form brachium pontis igbt Q on the described the 3rd 5by antiparallel igbt and diode form described the 3rd time brachium pontis igbt Q 2by antiparallel igbt and diode form described upper brachium pontis supplementary insulation grid bipolar transistor Q 7by antiparallel igbt and diode form described lower brachium pontis supplementary insulation grid bipolar transistor Q 8by antiparallel igbt and diode form described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1by antiparallel igbt and diode form described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2by antiparallel igbt and diode form described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3by antiparallel igbt and diode form.
The above-mentioned fault-tolerant inverter circuit of a kind of three-phase, is characterized in that: described diode diode diode diode diode diode diode diode diode diode and diode be fast recovery diode or high-frequency diode.
The present invention also provides a kind of method step simple, has avoided the generation of secondary failure, has good fault-tolerant operation function, can guarantee the control method of the fault-tolerant inverter circuit of three-phase of the reliability of system, it is characterized in that the method comprises the following steps:
During igbt short circuit on step 1, the brachium pontis on x inverter bridge leg open circuit or x inverter bridge leg, described external control circuit sends control signal conducting x inverter bridge leg supplementary insulation grid bipolar transistor S x; Wherein, the value of x is 1,2 or 3;
Step 2, judgement are the maybe igbt short circuits on brachium pontis on this of upper brachium pontis open circuit of x inverter bridge leg, or the lower brachium pontis of x inverter bridge leg open circuit is the igbt short circuit on this lower brachium pontis maybe, or the upper brachium pontis of x inverter bridge leg and lower brachium pontis all open a way the maybe igbt on brachium pontis and the equal short circuit of igbt on this lower brachium pontis on this;
When the upper brachium pontis open circuit of x inverter bridge leg is maybe on this during the igbt short circuit on brachium pontis, described external control circuit stops sending the control signal to the igbt on brachium pontis on this, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control;
When the lower brachium pontis open circuit of x inverter bridge leg is maybe during the igbt short circuit on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on this lower brachium pontis, control logic when meanwhile, described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control;
When the igbt on the upper brachium pontis of x inverter bridge leg and lower brachium pontis are all opened a way maybe this on brachium pontis and the equal short circuit of igbt on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on the igbt on brachium pontis on this and this lower brachium pontis, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control, control logic when described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control.
The present invention compared with prior art has the following advantages:
1, the circuit structure of the fault-tolerant inverter circuit of three-phase of the present invention is simple, and the control method of the fault-tolerant inverter circuit of three-phase realizes simple, and it is convenient to realize.
2, the present invention is by the fast acting fuse of connecting on each brachium pontis of traditional inverter bridge, when there is igbt short trouble, will burn the fast acting fuse on this igbt place brachium pontis, realized the conversion of short trouble to open fault, simultaneously, when single brachium pontis open fault, external control circuit stops to Trouble ticket brachium pontis output control signal, single brachium pontis open fault just can not exert an influence to reconstruct inverter, realized the Fault Isolation of open circuit or short trouble place brachium pontis, Avoids or reduces the impact of fault on whole system; Fault Isolation is that the faulty component of diagnosing out and other normal parts are carried out to separated technology, after the fault of inverter bridge is successfully diagnosed, must take measures to isolate, otherwise can affect other normal work partly, causes secondary failure; The present invention has avoided the generation of secondary failure effectively.
3, the present invention by adding inversion auxiliary circuit between DC power supply and inverter bridge, realized the igbt short circuit on brachium pontis on the open circuit of brachium pontis on inverter bridge list or inverter bridge list, igbt short circuit on brachium pontis under brachium pontis open circuit or inverter bridge list under inverter bridge list, and the upper brachium pontis of a brachium pontis of inverter bridge and lower brachium pontis is all opened a way or fault-tolerant operation when the upper brachium pontis of a brachium pontis of inverter bridge and the equal short circuit of igbt on lower brachium pontis, do not reduce the load capacity of whole inverter circuit, the performance of inverter circuit load can not be affected, can guarantee the reliability service of whole system.
4, of the present invention practical, result of use is good, is convenient to promote the use of.
In sum, the present invention realizes conveniently, short trouble can be converted to open fault, realized the Fault Isolation of short trouble or open fault place brachium pontis, avoid the generation of secondary failure, there is good fault-tolerant operation function, can guarantee the reliability of system, practical, be convenient to promote the use of.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the fault-tolerant inverter circuit of three-phase of the present invention.
Fig. 2 a is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, the 3rd time brachium pontis igbt Q 2heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7current circuit figure during conducting.
Fig. 2 b is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, the 3rd time brachium pontis igbt Q 2heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7current circuit figure during shutoff.
Fig. 3 a is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7heng Tong, the 3rd time brachium pontis igbt Q 2current circuit figure during conducting.
Fig. 3 b is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7heng Tong, the 3rd time brachium pontis igbt Q 2current circuit figure during shutoff.
Fig. 4 a is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during conducting.
Fig. 4 b is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during shutoff.
Fig. 5 a is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during conducting.
Fig. 5 b is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during shutoff.
Fig. 6 a be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during conducting.
Fig. 6 b be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during shutoff.
Fig. 7 a be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during conducting.
Fig. 7 b be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during shutoff.
Description of reference numerals:
1-DC power supply; 2-inversion auxiliary circuit; 3-inverter bridge;
4-three-phase brushless dc motor.
Embodiment
As shown in Figure 1, the fault-tolerant inverter circuit of three-phase of the present invention, comprise DC power supply 1 and under the control of control circuit externally by the inverter bridge of converting direct-current power into alternating-current power 3, described inverter bridge 3 is comprised of the first inverter bridge leg, the second inverter bridge leg and the 3rd inverter bridge leg, is connected with brachium pontis igbt Q on first on the upper brachium pontis of described the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with brachium pontis igbt Q first time 4, the upper brachium pontis of described the first inverter bridge leg and the link of lower brachium pontis are the first output of inverter bridge 3, are connected with brachium pontis igbt Q on second on the upper brachium pontis of described the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with brachium pontis igbt Q second time 6, the upper brachium pontis of described the second inverter bridge leg and the link of lower brachium pontis are the second output of inverter bridge 3, are connected with brachium pontis igbt Q on the 3rd on the upper brachium pontis of described the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with brachium pontis igbt Q the 3rd time 2, the upper brachium pontis of described the 3rd inverter bridge leg and the link of lower brachium pontis are the 3rd output of inverter bridge 3; On the upper brachium pontis of described the first inverter bridge leg, be connected with first on brachium pontis igbt Q 1series connection and for by brachium pontis igbt Q on first 1short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with and first time brachium pontis igbt Q 4series connection and for by first time brachium pontis igbt Q 4short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the first inverter bridge leg 4, on the upper brachium pontis of described the second inverter bridge leg, be connected with second on brachium pontis igbt Q 3series connection and for by brachium pontis igbt Q on second 3short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with and second time brachium pontis igbt Q 6be in series with for by second time brachium pontis igbt Q 6short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the second inverter bridge leg 6, on the upper brachium pontis of described the 3rd inverter bridge leg, be connected with the 3rd on brachium pontis igbt Q 5series connection and for by brachium pontis igbt Q on the 3rd 5short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with and the 3rd time brachium pontis igbt Q 2series connection and for by the 3rd time brachium pontis igbt Q 2short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the 3rd inverter bridge leg 2; Between described DC power supply 1 and inverter bridge 3, be connected with the inversion auxiliary circuit 2 that makes inverter bridge 3 fault-tolerant operations under the control for control circuit externally, described inversion auxiliary circuit 2 is by upper brachium pontis supplementary insulation grid bipolar transistor Q 7, lower brachium pontis supplementary insulation grid bipolar transistor Q 8, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1, the second inverter bridge leg supplementary insulation grid bipolar transistor S 2with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, and single-phase rectification bridge Z 1, single-phase rectification bridge Z 2with single-phase rectification bridge Z 3form; Described upper brachium pontis supplementary insulation grid bipolar transistor Q 7collector electrode and the positive pole of DC power supply 1 join, described upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8collector electrode join, described lower brachium pontis supplementary insulation grid bipolar transistor Q 8emitter and the negative pole of DC power supply 1 join, described single-phase rectification bridge Z 1an ac input end, single-phase rectification bridge Z 2ac input end and single-phase rectification bridge Z 3an ac input end all with upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8the link of collector electrode join, described single-phase rectification bridge Z 1another ac input end and the first output of inverter bridge 3 join, described single-phase rectification bridge Z 2another ac input end and the second output of inverter bridge 3 join, described single-phase rectification bridge Z 3another ac input end and the 3rd output of inverter bridge 3 join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1collector electrode and single-phase rectification bridge Z 1cathode output end join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1emitter and single-phase rectification bridge Z 1cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2collector electrode and single-phase rectification bridge Z 2cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2emitter and single-phase rectification bridge Z 2cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3collector electrode and single-phase rectification bridge Z 3cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3emitter and single-phase rectification bridge Z 3cathode output end join.
In the present embodiment, brachium pontis igbt Q on described first 1by antiparallel igbt and diode form described first time brachium pontis igbt Q 4by antiparallel igbt and diode form brachium pontis igbt Q on described second 3by antiparallel igbt and diode form described second time brachium pontis igbt Q 6by antiparallel igbt and diode form brachium pontis igbt Q on the described the 3rd 5by antiparallel igbt and diode form described the 3rd time brachium pontis igbt Q 2by antiparallel igbt and diode form described upper brachium pontis supplementary insulation grid bipolar transistor Q 7by antiparallel igbt and diode form described lower brachium pontis supplementary insulation grid bipolar transistor Q 8by antiparallel igbt and diode form described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1by antiparallel igbt and diode form described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2by antiparallel igbt and diode form described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3by antiparallel igbt and diode form.
In the present embodiment, described diode diode diode diode diode diode diode diode diode diode and diode be fast recovery diode or high-frequency diode.
The control method of the fault-tolerant inverter circuit of three-phase of the present invention, comprises the following steps:
During igbt short circuit on step 1, the brachium pontis on x inverter bridge leg open circuit or x inverter bridge leg, described external control circuit sends control signal conducting x inverter bridge leg supplementary insulation grid bipolar transistor S x; Wherein, the value of x is 1,2 or 3;
Step 2, judgement are the maybe igbt short circuits on brachium pontis on this of upper brachium pontis open circuit of x inverter bridge leg, or the lower brachium pontis of x inverter bridge leg open circuit is the igbt short circuit on this lower brachium pontis maybe, or the upper brachium pontis of x inverter bridge leg and lower brachium pontis all open a way the maybe igbt on brachium pontis and the equal short circuit of igbt on this lower brachium pontis on this;
When the upper brachium pontis open circuit of x inverter bridge leg is maybe on this during the igbt short circuit on brachium pontis, described external control circuit stops sending the control signal to the igbt on brachium pontis on this, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control;
When the lower brachium pontis open circuit of x inverter bridge leg is maybe during the igbt short circuit on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on this lower brachium pontis, control logic when meanwhile, described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control;
When the igbt on the upper brachium pontis of x inverter bridge leg and lower brachium pontis are all opened a way maybe this on brachium pontis and the equal short circuit of igbt on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on the igbt on brachium pontis on this and this lower brachium pontis, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control, control logic when described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control.
In order to verify the fault-tolerant operation effect of inverter circuit of the present invention, carried out the present invention and be applied to the experiment that three-phase brushless dc motor 4 drives.Three-phase brushless dc motor 4 is operated in known 120o star three-phase six states, six states of three-phase brushless dc motor 4 are completely independent controlled, (electric current flows into three-phase brushless dc motor 4 from a to the state of switching on mutually with ac mutually, c flows out three-phase brushless dc motor 4 mutually) be example, fault-tolerant operation effect of the present invention is analyzed as follows:
The upper brachium pontis open circuit of (1) first inverter bridge leg is brachium pontis igbt Q on first on brachium pontis on this maybe 1short circuit
Due to brachium pontis igbt Q on first 1during short circuit, fast acting fuse F 1meeting quick fuse, so fast acting fuse F 1by brachium pontis igbt Q on first 1short trouble conversion for the upper brachium pontis open fault of the first inverter bridge leg.
1. above manage modulation, lower pipe Heng Tong (HPWM_LON) modulation system
When the modulation of upper pipe, lower pipe Heng Tong (HPWM_LON) modulation system, three-phase brushless dc motor 4 is operated in brachium pontis igbt Q on first on the upper brachium pontis of the first inverter bridge leg 1the 3rd time brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the lower brachium pontis of the 3rd inverter bridge leg 2the state period of Heng Tong.
When without open circuit or short trouble, brachium pontis igbt Q on first 1the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; Brachium pontis igbt Q on first 1pwm control signal modulation turn-off the period, brachium pontis igbt Q on first 1cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
As the upper brachium pontis open circuit of the first inverter bridge leg brachium pontis igbt Q on first on brachium pontis on this maybe 1during short circuit, described external control circuit sends control signal conducting the first inverter bridge leg supplementary insulation grid bipolar transistor S 1, allow the first inverter bridge leg supplementary insulation grid bipolar transistor S 1brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to brachium pontis igbt Q on first on brachium pontis on this 1control signal, meanwhile, described external control circuit is controlled on this brachium pontis igbt Q on first on brachium pontis according to it 1control logic during normal work is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control, go up brachium pontis supplementary insulation grid bipolar transistor Q 7the pwm control signal of being exported by described external control circuit is modulated, and described external control circuit continues to control the 3rd time brachium pontis igbt Q 2heng Tong, as shown in Figure 2 a and 2 b, Fig. 2 a is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg to the fault-tolerant operation situation of inverter circuit of the present invention 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, the 3rd time brachium pontis igbt Q 2heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7current circuit figure during conducting, Fig. 2 b is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, the 3rd time brachium pontis igbt Q 2heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7current circuit figure during shutoff.
By Fig. 2 a, can be found out, when external control circuit is controlled upper brachium pontis supplementary insulation grid bipolar transistor Q 7during conducting, the positive pole of DC power supply 1 is through igbt single-phase rectification bridge Z 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through fast acting fuse F 2and igbt the c that is added to three-phase brushless dc motor 4 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 2 b, can be found out, when external control circuit is controlled upper brachium pontis supplementary insulation grid bipolar transistor Q 7during shutoff, the electric current of three-phase brushless dc motor 4 is by fast acting fuse F 2, fast acting fuse F 4and diode form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, as the upper brachium pontis open circuit of the first inverter bridge leg brachium pontis igbt Q on first on brachium pontis on this maybe 1during short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
2. pipe modulation, upper pipe Heng Tong (HON_LPWM) modulation system under
When the modulation of lower pipe, upper pipe Heng Tong (HON_LPWM) modulation system, three-phase brushless dc motor 4 is operated in the 3rd time brachium pontis igbt Q on the lower brachium pontis of the 3rd inverter bridge leg 2brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the upper brachium pontis of the first inverter bridge leg first 1the state period of Heng Tong.
When without open circuit or short trouble, at the 3rd time brachium pontis igbt Q 2the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; At the 3rd time brachium pontis igbt Q 2pwm control signal modulation turn-off period, the 3rd time brachium pontis igbt Q 2cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
As the upper brachium pontis open circuit of the first inverter bridge leg brachium pontis igbt Q on first on brachium pontis on this maybe 1during short circuit, described external control circuit sends control signal conducting the first inverter bridge leg supplementary insulation grid bipolar transistor S 1, allow the first inverter bridge leg supplementary insulation grid bipolar transistor S 1brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to brachium pontis igbt Q on first on brachium pontis on this 1control signal, meanwhile, described external control circuit is controlled on this brachium pontis igbt Q on first on brachium pontis according to it 1control logic during normal work is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control, control upper brachium pontis supplementary insulation grid bipolar transistor Q 7heng Tong, the 3rd time brachium pontis igbt Q 2the pwm control signal that continuation is exported by described external control circuit is modulated, and as shown in Figure 3 a and Figure 3 b shows, Fig. 3 a is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg to the fault-tolerant operation situation of inverter circuit of the present invention 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7heng Tong, the 3rd time brachium pontis igbt Q 2current circuit figure during conducting, Fig. 3 b is brachium pontis igbt Q on the upper brachium pontis open circuit or first of the first inverter bridge leg 1short circuit, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1heng Tong, upper brachium pontis supplementary insulation grid bipolar transistor Q 7heng Tong, the 3rd time brachium pontis igbt Q 2current circuit figure during shutoff.
By Fig. 3 a, can be found out, when external control circuit is controlled the 3rd time brachium pontis igbt Q 2during conducting, the positive pole of DC power supply 1 is through igbt single-phase rectification bridge Z 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through fast acting fuse F 2and igbt the c that is added to three-phase brushless dc motor 4 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 3 b, can be found out, when external control circuit is controlled the 3rd time brachium pontis igbt Q 2during shutoff, the electric current of three-phase brushless dc motor 4 passes through diode fast acting fuse F 5, igbt single-phase rectification bridge Z 1and igbt form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, as the upper brachium pontis open circuit of the first inverter bridge leg brachium pontis igbt Q on first on brachium pontis on this maybe 1during short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
The lower brachium pontis open circuit of (2) the 3rd inverter bridge legs is the 3rd time brachium pontis igbt Q on this lower brachium pontis maybe 2short circuit
Due to the 3rd time brachium pontis igbt Q 2during short circuit, fast acting fuse F 2meeting quick fuse, so fast acting fuse F 2by the 3rd time brachium pontis igbt Q 2short trouble conversion for the lower brachium pontis open fault of the 3rd inverter bridge leg.
1. above manage modulation, lower pipe Heng Tong (HPWM_LON) modulation system
When the modulation of upper pipe, lower pipe Heng Tong (HPWM_LON) modulation system, three-phase brushless dc motor 4 is operated in brachium pontis igbt Q on first on the upper brachium pontis of the first inverter bridge leg 1the 3rd time brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the lower brachium pontis of the 3rd inverter bridge leg 2the state period of Heng Tong.
When without open circuit or short trouble, brachium pontis igbt Q on first 1the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; Brachium pontis igbt Q on first 1pwm control signal modulation turn-off the period, brachium pontis igbt Q on first 1cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
As the lower brachium pontis open circuit of the 3rd inverter bridge leg the 3rd time brachium pontis igbt Q on this lower brachium pontis maybe 2during short circuit, described external control circuit sends control signal conducting the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, allow the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to the 3rd time brachium pontis igbt Q 2control signal, meanwhile, described external control circuit is controlled the 3rd time brachium pontis igbt Q on this lower brachium pontis according to it 2control logic during normal work is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control, control lower brachium pontis supplementary insulation grid bipolar transistor Q 8heng Tong, brachium pontis igbt Q on first 1the pwm control signal that continuation is exported by described external control circuit is modulated, and the fault-tolerant operation situation of inverter circuit of the present invention is as shown in Fig. 4 a and Fig. 4 b, and Fig. 4 a is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during conducting, Fig. 4 b is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during shutoff.
By Fig. 4 a, can be found out, when external control circuit is controlled brachium pontis igbt Q on first 1during conducting, the positive pole of DC power supply 1 is through fast acting fuse F 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through igbt single-phase rectification bridge Z 3with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3the c that is added to three-phase brushless dc motor 4 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 4 b, can be found out, when external control circuit is controlled brachium pontis igbt Q on first 1during shutoff, the electric current of three-phase brushless dc motor 4 passes through igbt single-phase rectification bridge Z 3, igbt fast acting fuse F 4and diode form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, as the lower brachium pontis open circuit of the 3rd inverter bridge leg the 3rd time brachium pontis igbt Q on this lower brachium pontis maybe 2during short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
2. pipe modulation, upper pipe Heng Tong (HON_LPWM) modulation system under
When the modulation of lower pipe, upper pipe Heng Tong (HON_LPWM) modulation system, three-phase brushless dc motor 4 is operated in the 3rd time brachium pontis igbt Q on the lower brachium pontis of the 3rd inverter bridge leg 2brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the upper brachium pontis of the first inverter bridge leg first 1the state period of Heng Tong.
When without open circuit or short trouble, at the 3rd time brachium pontis igbt Q 2the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; At the 3rd time brachium pontis igbt Q 2pwm control signal modulation turn-off period, the 3rd time brachium pontis igbt Q 2cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
As the lower brachium pontis open circuit of the 3rd inverter bridge leg the 3rd time brachium pontis igbt Q on this lower brachium pontis maybe 2during short circuit, described external control circuit sends control signal conducting the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, allow the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to the 3rd time brachium pontis igbt Q 2control signal, meanwhile, described external control circuit is controlled the 3rd time brachium pontis igbt Q on this lower brachium pontis according to it 2control logic during normal work is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control, descend brachium pontis supplementary insulation grid bipolar transistor Q 8the pwm control signal of being exported by described external control circuit is modulated, and described external control circuit continues to control brachium pontis igbt Q on first 1heng Tong, the fault-tolerant operation situation of inverter circuit of the present invention is as shown in Fig. 5 a and Fig. 5 b, and Fig. 5 a is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during conducting, Fig. 5 b is lower brachium pontis open circuit or the 3rd time brachium pontis igbt Q of the 3rd inverter bridge leg 2short circuit, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during shutoff.
By Fig. 5 a, can be found out, when external control circuit is controlled lower brachium pontis supplementary insulation grid bipolar transistor Q 8during conducting, the positive pole of DC power supply 1 is through fast acting fuse F 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through igbt single-phase rectification bridge Z 3the c that is added to three-phase brushless dc motor 4 with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S3 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 5 b, can be found out, when external control circuit is controlled lower brachium pontis supplementary insulation grid bipolar transistor Q 8during shutoff, the electric current of three-phase brushless dc motor 4 passes through diode fast acting fuse F 5with fast acting fuse F 1form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, as the lower brachium pontis open circuit of the 3rd inverter bridge leg the 3rd time brachium pontis igbt Q on this lower brachium pontis maybe 2during short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
The upper brachium pontis of (3) the 3rd inverter bridge legs and the lower brachium pontis brachium pontis igbt Q on the 3rd on brachium pontis that all opens a way maybe on this 5with the 3rd time brachium pontis igbt Q on this lower brachium pontis 2all short circuits
Due to brachium pontis igbt Q on the 3rd 5during short circuit, fast acting fuse F 5meeting quick fuse, so fast acting fuse F 5by brachium pontis igbt Q on the 3rd 5short trouble conversion for the upper brachium pontis open fault of the 3rd inverter bridge leg; Due to the 3rd time brachium pontis igbt Q 2during short circuit, fast acting fuse F 2meeting quick fuse, so fast acting fuse F 2by the 3rd time brachium pontis igbt Q 2short trouble conversion for the lower brachium pontis open fault of the 3rd inverter bridge leg.
1. above manage modulation, lower pipe Heng Tong (HPWM_LON) modulation system
When the modulation of upper pipe, lower pipe Heng Tong (HPWM_LON) modulation system, three-phase brushless dc motor 4 is operated in brachium pontis igbt Q on first on the upper brachium pontis of the first inverter bridge leg 1the 3rd time brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the lower brachium pontis of the 3rd inverter bridge leg 2the state period of Heng Tong.
When without open circuit or short trouble, brachium pontis igbt Q on first 1the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; Brachium pontis igbt Q on first 1pwm control signal modulation turn-off the period, brachium pontis igbt Q on first 1cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
Brachium pontis igbt Q on the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis are all opened a way maybe this on brachium pontis the 3rd 5with the 3rd time brachium pontis igbt Q on this lower brachium pontis 2during equal short circuit, described external control circuit sends control signal conducting the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, allow the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to brachium pontis igbt Q on the 3rd 5with the 3rd time brachium pontis igbt Q 2control signal, meanwhile, described external control circuit is controlled on this brachium pontis igbt Q on the 3rd on brachium pontis according to it 5control logic during normal work is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7therefore control, because three-phase brushless dc motor 4 is operated in the state that ac switches on mutually, when without open circuit or short trouble, described external control circuit is not also to brachium pontis igbt Q on the 3rd 5control, so described external control circuit is not also to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control; Described external control circuit is controlled the 3rd time brachium pontis igbt Q on this lower brachium pontis according to it 2control logic during normal work is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control, control lower brachium pontis supplementary insulation grid bipolar transistor Q 8heng Tong, brachium pontis igbt Q on first 1the pwm control signal that continuation is exported by described external control circuit is modulated, the fault-tolerant operation situation of inverter circuit of the present invention as shown in Fig. 6 a and Fig. 6 b, Fig. 6 a be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during conducting, Fig. 6 b be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8brachium pontis igbt Q in Heng Tong, first 1current circuit figure during shutoff.
By Fig. 6 a, can be found out, when external control circuit is controlled brachium pontis igbt Q on first 1during conducting, the positive pole of DC power supply 1 is through fast acting fuse F 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through igbt single-phase rectification bridge Z 3with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3the c that is added to three-phase brushless dc motor 4 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 6 b, can be found out, when external control circuit is controlled brachium pontis igbt Q on first 1during shutoff, the electric current of three-phase brushless dc motor 4 is by single-phase rectification bridge Z 3, igbt igbt fast acting fuse F 4and diode form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, brachium pontis igbt Q on the 3rd on brachium pontis on the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis are all opened a way maybe this 5with the 3rd time brachium pontis igbt Q on this lower brachium pontis 2during equal short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
2. pipe modulation, upper pipe Heng Tong (HON_LPWM) modulation system under
When the modulation of lower pipe, upper pipe Heng Tong (HON_LPWM) modulation system, three-phase brushless dc motor 4 is operated in the 3rd time brachium pontis igbt Q on the lower brachium pontis of the 3rd inverter bridge leg 2brachium pontis igbt Q on the pwm control signal modulation of being exported by described external control circuit, the upper brachium pontis of the first inverter bridge leg first 1the state period of Heng Tong.
When without open circuit or short trouble, at the 3rd time brachium pontis igbt Q 2the pwm control signal modulation conducting period, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; At the 3rd time brachium pontis igbt Q 2pwm control signal modulation turn-off period, the 3rd time brachium pontis igbt Q 2cut-off, the voltage that is added in the ac phase two ends of three-phase brushless dc motor 4 equals zero.
Brachium pontis igbt Q on the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis are all opened a way maybe this on brachium pontis the 3rd 5with the 3rd time brachium pontis igbt Q on this lower brachium pontis 2during equal short circuit, described external control circuit sends control signal conducting the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, allow the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q on first 1with the 3rd time brachium pontis igbt Q 260 degree interval conductings always of work; Described external control circuit stops sending to brachium pontis igbt Q on the 3rd 5with the 3rd time brachium pontis igbt Q 2control signal, meanwhile, described external control circuit is controlled on this brachium pontis igbt Q on the 3rd on brachium pontis according to it 5control logic during normal work is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7therefore control, because three-phase brushless dc motor 4 is operated in the state that ac switches on mutually, when without open circuit or short trouble, described external control circuit is not also to brachium pontis igbt Q on the 3rd 5control, so described external control circuit is not also to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control; Described external control circuit is controlled the 3rd time brachium pontis igbt Q on this lower brachium pontis according to it 2control logic during normal work is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control, descend brachium pontis supplementary insulation grid bipolar transistor Q 8the pwm control signal of being exported by described external control circuit is modulated, and described external control circuit is controlled brachium pontis igbt Q on first 1heng Tong, the fault-tolerant operation situation of inverter circuit of the present invention as shown in Fig. 7 a and Fig. 7 b, Fig. 7 a be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during conducting, Fig. 7 b be the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis is all opened a way or the 3rd on brachium pontis igbt Q 5with the 3rd time brachium pontis igbt Q 2all short circuits, the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3brachium pontis igbt Q in Heng Tong, first 1heng Tong, lower brachium pontis supplementary insulation grid bipolar transistor Q 8current circuit figure during shutoff.
By Fig. 7 a, can be found out, when external control circuit is controlled lower brachium pontis supplementary insulation grid bipolar transistor Q 8during conducting, the positive pole of DC power supply 1 is through fast acting fuse F 1and igbt the a that is added to three-phase brushless dc motor 4 holds mutually, and the negative pole of DC power supply 1 is through igbt single-phase rectification bridge Z 3with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3the c that is added to three-phase brushless dc motor 4 holds mutually, and the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals the voltage E of DC power supply 1; By Fig. 7 b, can be found out, when external control circuit is controlled lower brachium pontis supplementary insulation grid bipolar transistor Q 8during shutoff, the electric current of three-phase brushless dc motor 4 is by single-phase rectification bridge Z 3, igbt diode fast acting fuse F1 and igbt form continuous current circuit, the same during with nothing open circuit or short trouble, the voltage at the ac phase two ends of three-phase brushless dc motor 4 equals zero.As can be seen here, brachium pontis igbt Q on the 3rd on brachium pontis on the upper brachium pontis of the 3rd inverter bridge leg and lower brachium pontis are all opened a way maybe this 5with the 3rd time brachium pontis igbt Q on this lower brachium pontis 2during equal short circuit, due to the fault-tolerant operation of inverter circuit of the present invention, the output performance of three-phase brushless dc motor 4 can't be affected.
In sum, the present invention is by the fast acting fuse of connecting on each brachium pontis of traditional inverter bridge, when there is igbt short trouble, will burn the fast acting fuse on this igbt place brachium pontis, realized the conversion of short trouble to open fault, simultaneously, when single brachium pontis open fault, external control circuit stops to Trouble ticket brachium pontis output control signal, single brachium pontis open fault just can not exert an influence to reconstruct inverter, realized the Fault Isolation of open circuit or short trouble place brachium pontis, Avoids or reduces the impact of fault on whole system.The present invention by adding inversion auxiliary circuit between DC power supply and inverter bridge, realized the igbt short circuit on brachium pontis on the open circuit of brachium pontis on inverter bridge list or inverter bridge list, igbt short circuit on brachium pontis under brachium pontis open circuit or inverter bridge list under inverter bridge list, and the upper brachium pontis of a brachium pontis of inverter bridge and lower brachium pontis is all opened a way or fault-tolerant operation when the upper brachium pontis of a brachium pontis of inverter bridge and the equal short circuit of igbt on lower brachium pontis, do not reduce the load capacity of whole inverter circuit, the performance of inverter circuit load can not be affected, can guarantee the reliability service of whole system.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection range of technical solution of the present invention.

Claims (4)

1. the fault-tolerant inverter circuit of three-phase, comprise DC power supply (1) and under the control of control circuit externally by the inverter bridge of converting direct-current power into alternating-current power (3), described inverter bridge (3) is comprised of the first inverter bridge leg, the second inverter bridge leg and the 3rd inverter bridge leg, is connected with brachium pontis igbt Q on first on the upper brachium pontis of described the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with brachium pontis igbt Q first time 4, the upper brachium pontis of described the first inverter bridge leg and the link of lower brachium pontis are the first output of inverter bridge (3), are connected with brachium pontis igbt Q on second on the upper brachium pontis of described the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with brachium pontis igbt Q second time 6, the upper brachium pontis of described the second inverter bridge leg and the link of lower brachium pontis are the second output of inverter bridge (3), are connected with brachium pontis igbt Q on the 3rd on the upper brachium pontis of described the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with brachium pontis igbt Q the 3rd time 2, the upper brachium pontis of described the 3rd inverter bridge leg and the link of lower brachium pontis are the 3rd output of inverter bridge (3); It is characterized in that: on the upper brachium pontis of described the first inverter bridge leg, be connected with first on brachium pontis igbt Q 1series connection and for by brachium pontis igbt Q on first 1short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the first inverter bridge leg 1, on the lower brachium pontis of described the first inverter bridge leg, be connected with and first time brachium pontis igbt Q 4series connection and for by first time brachium pontis igbt Q 4short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the first inverter bridge leg 4, on the upper brachium pontis of described the second inverter bridge leg, be connected with second on brachium pontis igbt Q 3series connection and for by brachium pontis igbt Q on second 3short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the second inverter bridge leg 3, on the lower brachium pontis of described the second inverter bridge leg, be connected with and second time brachium pontis igbt Q 6be in series with for by second time brachium pontis igbt Q 6short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the second inverter bridge leg 6, on the upper brachium pontis of described the 3rd inverter bridge leg, be connected with the 3rd on brachium pontis igbt Q 5series connection and for by brachium pontis igbt Q on the 3rd 5short trouble be converted to the fast acting fuse F of the upper brachium pontis open fault of the 3rd inverter bridge leg 5, on the lower brachium pontis of described the 3rd inverter bridge leg, be connected with and the 3rd time brachium pontis igbt Q 2series connection and for by the 3rd time brachium pontis igbt Q 2short trouble be converted to the fast acting fuse F of the lower brachium pontis open fault of the 3rd inverter bridge leg 2; Between described DC power supply (1) and inverter bridge (3), be connected with the inversion auxiliary circuit (2) that makes inverter bridge (3) fault-tolerant operation under the control for control circuit externally, described inversion auxiliary circuit (2) is by upper brachium pontis supplementary insulation grid bipolar transistor Q 7, lower brachium pontis supplementary insulation grid bipolar transistor Q 8, the first inverter bridge leg supplementary insulation grid bipolar transistor S 1, the second inverter bridge leg supplementary insulation grid bipolar transistor S 2with the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3, and single-phase rectification bridge Z 1, single-phase rectification bridge Z 2with single-phase rectification bridge Z 3form; Described upper brachium pontis supplementary insulation grid bipolar transistor Q 7collector electrode and the positive pole of DC power supply (1) join, described upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8collector electrode join, described lower brachium pontis supplementary insulation grid bipolar transistor Q 8emitter and the negative pole of DC power supply (1) join, described single-phase rectification bridge Z 1an ac input end, single-phase rectification bridge Z 2ac input end and single-phase rectification bridge Z 3an ac input end all with upper brachium pontis supplementary insulation grid bipolar transistor Q 7emitter and lower brachium pontis supplementary insulation grid bipolar transistor Q 8the link of collector electrode join, described single-phase rectification bridge Z 1another ac input end and the first output of inverter bridge (3) join, described single-phase rectification bridge Z 2another ac input end and the second output of inverter bridge (3) join, described single-phase rectification bridge Z 3another ac input end and the 3rd output of inverter bridge (3) join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1collector electrode and single-phase rectification bridge Z 1cathode output end join, described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1emitter and single-phase rectification bridge Z 1cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2collector electrode and single-phase rectification bridge Z 2cathode output end join, described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2emitter and single-phase rectification bridge Z 2cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3collector electrode and single-phase rectification bridge Z 3cathode output end join, described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3emitter and single-phase rectification bridge Z 3cathode output end join.
2. according to the fault-tolerant inverter circuit of a kind of three-phase claimed in claim 1, it is characterized in that: brachium pontis igbt Q on described first 1by antiparallel igbt and diode form described first time brachium pontis igbt Q 4by antiparallel igbt and diode form brachium pontis igbt Q on described second 3by antiparallel igbt and diode form described second time brachium pontis igbt Q 6by antiparallel igbt and diode form brachium pontis igbt Q on the described the 3rd 5by antiparallel igbt and diode form described the 3rd time brachium pontis igbt Q 2by antiparallel igbt and diode form described upper brachium pontis supplementary insulation grid bipolar transistor Q 7by antiparallel igbt and diode form described lower brachium pontis supplementary insulation grid bipolar transistor Q 8by antiparallel igbt and diode form described the first inverter bridge leg supplementary insulation grid bipolar transistor S 1by antiparallel igbt and diode form described the second inverter bridge leg supplementary insulation grid bipolar transistor S 2by antiparallel igbt and diode form described the 3rd inverter bridge leg supplementary insulation grid bipolar transistor S 3by antiparallel igbt and diode form.
3. according to the fault-tolerant inverter circuit of a kind of three-phase claimed in claim 2, it is characterized in that: described diode diode diode diode diode diode diode diode diode diode and diode be fast recovery diode or high-frequency diode.
4. a control method for the fault-tolerant inverter circuit of three-phase as claimed in claim 1, is characterized in that the method comprises the following steps:
During igbt short circuit on step 1, the brachium pontis on x inverter bridge leg open circuit or x inverter bridge leg, described external control circuit sends control signal conducting x inverter bridge leg supplementary insulation grid bipolar transistor S x; Wherein, the value of x is 1,2 or 3;
Step 2, judgement are the maybe igbt short circuits on brachium pontis on this of upper brachium pontis open circuit of x inverter bridge leg, or the lower brachium pontis of x inverter bridge leg open circuit is the igbt short circuit on this lower brachium pontis maybe, or the upper brachium pontis of x inverter bridge leg and lower brachium pontis all open a way the maybe igbt on brachium pontis and the equal short circuit of igbt on this lower brachium pontis on this;
When the upper brachium pontis open circuit of x inverter bridge leg is maybe on this during the igbt short circuit on brachium pontis, described external control circuit stops sending the control signal to the igbt on brachium pontis on this, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control;
When the lower brachium pontis open circuit of x inverter bridge leg is maybe during the igbt short circuit on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on this lower brachium pontis, control logic when meanwhile, described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control;
When the igbt on the upper brachium pontis of x inverter bridge leg and lower brachium pontis are all opened a way maybe this on brachium pontis and the equal short circuit of igbt on this lower brachium pontis, described external control circuit stops sending the control signal to the igbt on the igbt on brachium pontis on this and this lower brachium pontis, control logic when meanwhile, described external control circuit controls on this according to it that igbt on brachium pontis is normally worked is to upper brachium pontis supplementary insulation grid bipolar transistor Q 7control, control logic when described external control circuit is controlled igbt on this lower brachium pontis and normally worked according to it is to lower brachium pontis supplementary insulation grid bipolar transistor Q 8control.
CN201410206324.0A 2014-05-15 2014-05-15 Three-phase fault-tolerant inverter circuit and control method thereof Expired - Fee Related CN103944436B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104155564A (en) * 2014-08-28 2014-11-19 西安科技大学 Brushless direct-current motor inverter single tube open-circuit fault diagnosing and positioning method
CN104617759A (en) * 2015-01-31 2015-05-13 盐城工学院 Phase redundancy three phase inverter fault tolerance circuit and control method thereof
CN105406728A (en) * 2015-10-19 2016-03-16 南京航空航天大学 Full bidirectional switch mode two stage matrix converter rectification-level switch tube open circuit fault error-tolerance control method
CN107404236A (en) * 2016-05-18 2017-11-28 株式会社日立制作所 Power conversion device and the lift appliance for applying the power conversion device
CN109245054A (en) * 2018-11-02 2019-01-18 南京工程学院 Permanent magnetic brushless direct-current motor driver leads directly to trouble hunting system and method
DE102018118236A1 (en) * 2018-07-27 2020-01-30 HELLA GmbH & Co. KGaA Control system for a motor vehicle and method for fault diagnosis in a control system
CN112039326A (en) * 2020-08-17 2020-12-04 上海电机学院 Four-bridge-arm fault-tolerant system of brushless direct current motor inverter and control method thereof
CN112910289A (en) * 2021-02-05 2021-06-04 珠海格力电器股份有限公司 Inverter, inverter control method and motor system
CN113759257A (en) * 2020-07-17 2021-12-07 北京京东尚科信息技术有限公司 Current compensation circuit and method for electronic equipment and electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201839223U (en) * 2010-09-29 2011-05-18 西安科技大学 Zero-voltage transition inverter circuit of brushless DC motor
US20120313564A1 (en) * 2009-12-22 2012-12-13 Astrium Sas Reconfigurable inverter having failure tolerance for powering a synchronous poly-phase motor having permanent magnets, and assembly including said inverter and motor
CN203840234U (en) * 2014-05-15 2014-09-17 西安科技大学 Inverter having fault tolerance function

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120313564A1 (en) * 2009-12-22 2012-12-13 Astrium Sas Reconfigurable inverter having failure tolerance for powering a synchronous poly-phase motor having permanent magnets, and assembly including said inverter and motor
CN201839223U (en) * 2010-09-29 2011-05-18 西安科技大学 Zero-voltage transition inverter circuit of brushless DC motor
CN203840234U (en) * 2014-05-15 2014-09-17 西安科技大学 Inverter having fault tolerance function

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* Cited by examiner, † Cited by third party
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CN104155564A (en) * 2014-08-28 2014-11-19 西安科技大学 Brushless direct-current motor inverter single tube open-circuit fault diagnosing and positioning method
CN104155564B (en) * 2014-08-28 2017-01-25 西安科技大学 Brushless direct-current motor inverter single tube open-circuit fault diagnosing and positioning method
CN104617759A (en) * 2015-01-31 2015-05-13 盐城工学院 Phase redundancy three phase inverter fault tolerance circuit and control method thereof
CN105406728A (en) * 2015-10-19 2016-03-16 南京航空航天大学 Full bidirectional switch mode two stage matrix converter rectification-level switch tube open circuit fault error-tolerance control method
CN105406728B (en) * 2015-10-19 2018-05-08 南京航空航天大学 Fault tolerant control method during full two-way switch type dual stage matrix converter rectification stage switching tube open fault
CN107404236A (en) * 2016-05-18 2017-11-28 株式会社日立制作所 Power conversion device and the lift appliance for applying the power conversion device
CN107404236B (en) * 2016-05-18 2019-07-12 株式会社日立制作所 Power conversion device and the lift appliance for applying the power conversion device
DE102018118236A1 (en) * 2018-07-27 2020-01-30 HELLA GmbH & Co. KGaA Control system for a motor vehicle and method for fault diagnosis in a control system
CN109245054A (en) * 2018-11-02 2019-01-18 南京工程学院 Permanent magnetic brushless direct-current motor driver leads directly to trouble hunting system and method
CN113759257A (en) * 2020-07-17 2021-12-07 北京京东尚科信息技术有限公司 Current compensation circuit and method for electronic equipment and electronic equipment
CN112039326A (en) * 2020-08-17 2020-12-04 上海电机学院 Four-bridge-arm fault-tolerant system of brushless direct current motor inverter and control method thereof
CN112910289A (en) * 2021-02-05 2021-06-04 珠海格力电器股份有限公司 Inverter, inverter control method and motor system

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