CN112165309A - Magnetic suspension track coil power electronic amplifier and fault detection method thereof - Google Patents
Magnetic suspension track coil power electronic amplifier and fault detection method thereof Download PDFInfo
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- 239000000725 suspension Substances 0.000 title claims abstract description 129
- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 239000004020 conductor Substances 0.000 claims abstract description 91
- 238000005339 levitation Methods 0.000 claims description 83
- 238000000034 method Methods 0.000 claims description 39
- 238000004590 computer program Methods 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 15
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
- H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2853—Electrical testing of internal connections or -isolation, e.g. latch-up or chip-to-lead connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
- H03F1/526—Circuit arrangements for protecting such amplifiers protecting by using redundant amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
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Abstract
The invention provides a magnetic suspension track coil power electronic amplifier and a fault detection method thereof, wherein the magnetic suspension track coil power electronic amplifier comprises: six one-way switches, six controllable switches and two coils, wherein: the six one-way breakover devices are respectively connected with the six controllable switches in parallel; one end of the first unidirectional conductor is connected with one end of the first coil, and the other end of the first unidirectional conductor is connected with the positive electrode of the power supply; one end of a second one-way conductor is connected with the other end of the first coil and one end of the second coil, and the other end of the second one-way conductor is connected with the positive electrode of the power supply; the power electronic amplifier of the magnetic suspension track coil provided by the invention has better fault-tolerant capability, solves the problems of insufficient fault-tolerant capability and the like in a magnetic suspension track system in the prior art, ensures the normal suspension of a magnetic suspension track, and improves the safety and the robustness of the magnetic suspension track coil.
Description
Technical Field
The invention relates to the technical field of communication of railway vehicles, in particular to a magnetic suspension railway coil and the field of fault protection thereof, and specifically relates to a magnetic suspension railway coil power electronic amplifier and a fault detection method thereof.
Background
As is well known, a maglev rail train is a novel vehicle consisting of a contactless magnetic bearing, the early conception of the maglev train already in the early nineteenth century, and the maglev train which is successfully put into operation in many countries in the world has been developed for centuries. The magnetic suspension system consists of a suspension object, a sensor, a controller and an actuator 4, wherein the actuator comprises an electromagnet and a power amplifier. At the reference position, the levitated object is disturbed and deviates from the reference position, the sensor detects the displacement of the levitated object from the reference position, the microprocessor as a controller converts the detected displacement into a control signal, then the power amplifier converts the control signal into a control current, and the control current generates magnetic force in the electromagnet of the actuator, so that the levitated object returns to the original balance position.
The power electronic amplifier of the magnetic suspension track coil has the function of amplifying an output control signal of the controller into an actual current signal in the coil, thereby controlling the electromagnetic force generated by the magnetic suspension device, and the power electronic amplifier is an important component in the magnetic suspension track. The magnetic levitation track coil power electronic amplifier needs to be able to respond quickly to the position control loop control signal variable. The load circuit of the power electronic amplifier of the magnetic suspension track coil is the electromagnetic coil of the magnetic suspension track, wherein the resistance of the coil is generally much smaller than that of an inductive load, so that the power amplifier generally has a certain time delay effect. Because the power electronic amplifier has the advantages of small loss, high efficiency and the like compared with an analog power amplifier, the power electronic amplifier is more and more widely used in an actual magnetic suspension system. The power electronic amplifier has high required bandwidth and quick response, and the switching frequency of the power electronic amplifier is improved, so that the bandwidth of a current loop can be increased, current ripples are reduced, and a better control effect is obtained; but also more switching losses are introduced, so that the switching element heats up severely and the switching element fails. Common failure modes of the switching elements include open-circuit failure and short-circuit failure. Open circuit failures are typically due to cracking or floating of the component weld lines, etc., caused by high temperatures, high current densities; short-circuit faults such as component breakdown caused by high temperature and strong electric field effect can directly cause the power amplifier to lose the control effect on the current of the coil of the magnetic suspension track, thereby causing system control failure.
In summary, it is an urgent need to solve the above-mentioned problems by those skilled in the art to provide a magnetic levitation track coil power electronic amplifier with fault-tolerant capability.
Disclosure of Invention
Aiming at the problems in the prior art, the power electronic amplifier of the magnetic suspension track coil provided by the invention has better fault-tolerant capability, and in addition, the invention also provides a fault detection method based on the power electronic amplifier of the magnetic suspension track coil, which solves the problems of insufficient fault-tolerant capability and the like in a magnetic suspension track system in the prior art, can provide fault-tolerant operation capability when an open-circuit fault occurs in the power electronic amplifier of the magnetic suspension track coil, ensures the normal suspension of the magnetic suspension track, and improves the safety and the robustness of the magnetic suspension track coil.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a power electronic amplifier for a magnetic levitation railway coil, comprising: six one-way switches, six controllable switches and two coils, wherein:
the six one-way breakover devices are respectively connected with the six controllable switches in parallel;
one end of the first unidirectional conductor is connected with one end of the first coil, and the other end of the first unidirectional conductor is connected with the positive electrode of the power supply;
one end of a second one-way conductor is connected with the other end of the first coil and one end of the second coil, and the other end of the second one-way conductor is connected with the positive electrode of the power supply;
one end of a third one-way conductor is connected with the other end of the second coil, and the other end of the third one-way conductor is connected with the positive electrode of the power supply;
one end of a fourth one-way conductor is connected with one end of the first coil, and the other end of the fourth one-way conductor is connected with the negative electrode of the power supply;
one end of a fifth one-way conductor is connected with the other end of the first coil, and the other end of the fifth one-way conductor is connected with the negative electrode of the power supply;
one end of a sixth one-way conductor is connected with the other end of the second coil, and the other end of the sixth one-way conductor is connected with the negative electrode of the power supply.
In one embodiment, the six controllable switches are all of the type of insulated gate bipolar transistor.
In one embodiment, the six unidirectional conductors are all of diode type.
In one embodiment, the cathodes of the six diodes are respectively connected with the collectors of the six insulated gate bipolar transistors;
and the anodes of the six diodes are respectively connected with the emitting electrodes of the six insulated gate bipolar transistors.
In a second aspect, the present invention further provides a method for detecting a fault of a power electronic amplifier of a magnetic levitation track coil, the method comprising:
collecting the current of the first coil and the current of the second coil in real time;
and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
In one embodiment, the normal operation mode of the magnetic levitation track coil power electronic amplifier is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted;
the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
In one embodiment, the method for detecting the fault of the power electronic amplifier of the magnetic levitation track coil further comprises the following steps:
when the magnetic levitation track is normally levitated, collecting the current of the first coil and the current of the second coil;
and generating a preset current threshold according to the current of the first coil and the current of the second coil.
In one embodiment, the fault detection of the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil comprises:
when the sum of the current of the first coil and the current of the second coil is greater than the preset current threshold, judging that the power electronic amplifier of the magnetic suspension track coil is in short-circuit fault;
and when the sum of the current of the first coil and the current of the second coil is smaller than the preset current threshold, judging that the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault.
In one embodiment, the method for detecting the fault of the power electronic amplifier of the magnetic levitation track coil further comprises the following steps:
when the power electronic amplifier of the magnetic suspension track coil is in short circuit fault, all the switch elements are blocked and the power supply is cut off;
and when the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault, the power electronic amplifier of the magnetic suspension track coil is switched to a redundancy working mode.
In a third aspect, the present invention further provides a fault detection device for a power electronic amplifier of a magnetic levitation railway coil, comprising:
the first current acquisition unit is used for acquiring the currents of the first coil and the second coil in real time;
and the fault detection unit is used for carrying out fault detection on the power electronic amplifier of the magnetic suspension track coil according to the current of the first coil and the current of the second coil.
In one embodiment, the fault detection device for the power electronic amplifier of the magnetic levitation track coil further comprises:
the normal working mode of the power electronic amplifier of the magnetic suspension track coil is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted;
the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
In one embodiment, the fault detection device for the power electronic amplifier of the magnetic levitation track coil further comprises:
the second current acquisition unit is used for acquiring the current of the first coil and the current of the second coil when the magnetic levitation track is normally levitated;
and the threshold value generating unit is used for generating a preset current threshold value according to the current of the first coil and the current of the second coil.
In one embodiment, the fault detection unit includes:
the short circuit judgment module is used for judging that the power electronic amplifier of the magnetic suspension track coil is in short circuit fault;
and the open circuit judgment module is used for judging that the power electronic amplifier of the magnetic suspension track coil is in open circuit fault.
In one embodiment, the short circuit determination module includes:
the power supply cut-off module is used for blocking all the switch elements and cutting off the power supply;
the open circuit judging module comprises:
and the redundancy mode switching module is used for switching the power electronic amplifier of the magnetic suspension track coil into a redundancy working mode.
In a fourth aspect, the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for detecting a failure of a power electronic amplifier of a magnetic levitation track coil when executing the program.
In a fifth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for fault detection of a power electronic amplifier of a magnetic levitation track coil.
As can be seen from the above description, the power electronic amplifier for magnetic levitation track coil provided by the embodiment of the present invention includes: six one-way switches, six controllable switches and two coils, wherein: the six one-way breakover devices are respectively connected with the six controllable switches in parallel; one end of the first unidirectional conductor is connected with one end of the first coil, and the other end of the first unidirectional conductor is connected with the positive electrode of the power supply; one end of the second unidirectional conductor is connected with the other end of the first coil and one end of the second coil, and the other end of the second unidirectional conductor is connected with the positive electrode of the power supply; one end of a third one-way conductor is connected with the other end of the second coil, and the other end of the third one-way conductor is connected with the positive electrode of the power supply; one end of a fourth one-way conductor is connected with one end of the first coil, and the other end of the fourth one-way conductor is connected with the negative electrode of the power supply; one end of a fifth one-way conductor is connected with the other end of the first coil, and the other end of the fifth one-way conductor is connected with the negative electrode of the power supply; one end of the sixth one-way conductor is connected with the other end of the second coil, and the other end of the sixth one-way conductor is connected with the negative electrode of the power supply. In addition, the embodiment of the invention also provides a fault detection method of the power electronic amplifier of the magnetic suspension track coil, which comprises the following steps: collecting the current of the first coil and the current of the second coil in real time; and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
The magnetic suspension track coil power electronic amplifier and the fault detection method matched with the same provided by the embodiment of the invention have fault-tolerant capability, can provide fault-tolerant operation capability when an open circuit fault occurs in the magnetic suspension track coil power electronic amplifier, ensure the normal suspension of a magnetic suspension track, and improve the safety and the robustness of the magnetic suspension track coil.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first schematic diagram of a power electronic amplifier of a magnetic levitation track coil in an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of a power electronic amplifier of a magnetic levitation track coil in an embodiment of the present invention;
FIG. 3 is a first flowchart illustrating a method for detecting a failure of a power electronic amplifier of a magnetic levitation track coil according to an embodiment of the present invention;
FIG. 4 is a second flowchart illustrating a method for detecting a failure of a power electronic amplifier of a magnetic levitation track coil according to an embodiment of the present invention;
FIG. 5 is a flowchart of step 200 in an embodiment of the present invention;
FIG. 6 is a diagram of a magnetic levitation track coil in an embodiment of the present invention;
FIG. 7 is a flow chart of a method for detecting a fault of a power electronic amplifier of a magnetic levitation track coil in a specific application example of the invention;
FIG. 8 is a diagram illustrating a normal operation mode of a power electronic amplifier of a magnetic levitation track coil in an embodiment of the present invention;
FIG. 9 is a schematic diagram of the redundant operation mode of the power electronic amplifier of the magnetic levitation track coil in the embodiment of the invention;
FIG. 10 is a logic diagram of the fault detection of the power electronic amplifier of the magnetic levitation track coil in the specific application example of the present invention;
FIG. 11 is a first block diagram of a fault detection device of a power electronic amplifier of a magnetic levitation track coil according to an embodiment of the present invention;
FIG. 12 is a block diagram of a fault detection device of a power electronic amplifier of a magnetic levitation track coil according to an embodiment of the present invention;
FIG. 13 is a block diagram of a fault detection unit in an embodiment of the invention;
FIG. 14 is a block diagram of a short circuit determination module according to an embodiment of the present invention;
FIG. 15 is a block diagram of an open circuit determination module according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a specific implementation manner of a power electronic amplifier of a magnetic levitation track coil, and with reference to fig. 1, the specific implementation manner includes the following contents: unidirectional conducting device DP1And a unidirectional conducting device Dn1And a unidirectional conducting device DP2And a unidirectional conducting device Dn2And a unidirectional conducting device DP3And a unidirectional conducting device Dn3Controllable switch SP1Controllable switch Sn1Controllable switch SP2Controllable switch Sn2Controllable switch SP3Controllable switch Sn3Coil A1Coil A2And a DC voltage source Vdc(ii) a Wherein:
the six one-way breakover devices are respectively connected with the six controllable switches in parallel; namely: unidirectional conducting device DP1And a controllable switch Sp1Parallel connection; unidirectional conducting device DP2And a controllable switch Sp2Parallel connection; unidirectional conducting device DP3And a controllable switch Sp3Parallel connection; unidirectional conducting device Dn1And a controllable switch Sn1Parallel connection; unidirectional conducting device Dn2And a controllable switch Sn2Parallel connection; unidirectional conducting device Dn2And a controllable switch Sn2Parallel connection;
referring to fig. 2 (fig. 2 indicates the directions of the respective elements on the basis of fig. 1), a unidirectional conducting device DP1One end P11 and coil A1One end A11 of the device is connected with a unidirectional conducting device DP11The other end P12 is connected with the positive pole of the power supply; unidirectional conducting device DP2One end P21 and coil A1Another end A12 and coil A2One end A21 of the device is connected with a unidirectional conducting device DP2The other end P22 is connected with the positive pole of the power supply; unidirectional conducting device DP3One end P31 and coil A2Is connected with the other end A22 of the unidirectional conducting device DP3The other end P32 is connected with the positive pole of the power supply; unidirectional conducting device Dn1One end N11 and coil A1One end A11 of the device is connected with a unidirectional conducting device Dn1The other end N12 is connected with the negative pole of the power supply; unidirectional conducting device Dn2One end N21 and coil A1Is connected with the other end A12 of the unidirectional conducting device Dn2The other end N22 is connected with the negative pole of the power supply; unidirectional conducting device Dn3One end N31 and coil A2Is connected with the other end A22 of the unidirectional conducting device Dn3And the other end N32 is connected to the negative pole of the power supply.
As can be seen from the above description, the power electronic amplifier for magnetic levitation track coil provided by the embodiment of the present invention includes: six one-way switches, six controllable switches and two coils, wherein: the six one-way breakover devices are respectively connected with the six controllable switches in parallel; one end of the first unidirectional conductor is connected with one end of the first coil, and the other end of the first unidirectional conductor is connected with the positive electrode of the power supply; one end of the second unidirectional conductor is connected with the other end of the first coil and one end of the second coil, and the other end of the second unidirectional conductor is connected with the positive electrode of the power supply; one end of a third one-way conductor is connected with the other end of the second coil, and the other end of the third one-way conductor is connected with the positive electrode of the power supply; one end of a fourth one-way conductor is connected with one end of the first coil, and the other end of the fourth one-way conductor is connected with the negative electrode of the power supply; one end of a fifth one-way conductor is connected with the other end of the first coil, and the other end of the fifth one-way conductor is connected with the negative electrode of the power supply; one end of the sixth one-way conductor is connected with the other end of the second coil, and the other end of the sixth one-way conductor is connected with the negative electrode of the power supply.
The power electronic amplifier of the magnetic suspension track coil provided by the invention has fault-tolerant capability, can provide fault-tolerant operation capability when an open circuit fault occurs in the power electronic amplifier of the magnetic suspension track coil, ensures the normal suspension of the magnetic suspension track, and has high safety and robustness of the magnetic suspension track coil.
In one embodiment, the six controllable switches are all of the type of insulated gate bipolar transistors. In particular, referring to fig. 2, the controllable switch Sn1Controllable switch SP2Controllable switch Sn2Controllable switch SP3Controllable switch Sn3Are all insulated gate bipolar transistors;
in one embodiment, the six unidirectional conductors are all of diode type.
In one embodiment, the cathodes of the six diodes are respectively connected with the collectors of the six insulated gate bipolar transistors; and the anodes of the six diodes are respectively connected with the emitting electrodes of the six insulated gate bipolar transistors. See in particular fig. 2.
Insulated gate bipolar crystalBody tube SP1Is connected with the positive electrode of the power supply, and the emitter thereof is connected with the coil A1And an insulated gate bipolar transistor Sn1Is connected with the collector of the collector; insulated gate bipolar transistor Sn1Collector of and insulated gate bipolar transistor SP1The emitter of the power supply is connected with the negative electrode of the power supply; insulated gate bipolar transistor SP2Is connected with the positive electrode of the power supply, and the emitter thereof is connected with the coil A1Coil A2And an insulated gate bipolar transistor Sn2Is connected with the collector of the collector; insulated gate bipolar transistor Sn2Collector of and insulated gate bipolar transistor SP2The emitter of the power supply is connected with the negative electrode of the power supply; insulated gate bipolar transistor SP3Is connected with the positive electrode of the power supply, and the emitter thereof is connected with the coil A2And an insulated gate bipolar transistor Sn3Is connected with the collector of the collector; insulated gate bipolar transistor Sn3Collector of and insulated gate bipolar transistor SP3The emitter of the power supply is connected with the negative electrode of the power supply; and a diode DP1Negative pole and controllable switch SP1Is connected with the positive pole of the collector and is connected with the controllable switch SP1The emitter of (3) is connected; diode Dn1Negative pole and controllable switch Sn1Is connected with the positive pole of the collector and is connected with the controllable switch Sn1The emitter of (3) is connected; diode DP2Negative pole and controllable switch SP2Is connected with the positive pole of the collector and is connected with the controllable switch SP2The emitter of (3) is connected; diode Dn2Negative pole and controllable switch Sn2Is connected with the positive pole of the collector and is connected with the controllable switch Sn2The emitter of (3) is connected; diode DP3Negative pole and controllable switch SP3Is connected with the positive pole of the collector and is connected with the controllable switch SP3The emitter of (3) is connected; diode Dn3Negative pole and controllable switch Sn3Is connected with the positive pole of the collector and is connected with the controllable switch Sn3Is connected to the emitter.
Based on the topology shown in FIG. 2, an insulated gate bipolar transistor SP1Insulated gate bipolar transistor Sn1Insulated gate bipolar transistor SP2Insulated gate bipolar transistor Sn2And the insulated gate is doublePolar transistor SP3And an insulated gate bipolar transistor Sn3The on-time is controlled by changing the gate control signal.
In summary, the power electronic amplifier for the magnetic levitation track coil provided by the embodiment of the present invention includes 6 unidirectional conducting devices, 6 controllable switches, 2 coils, and 1 dc voltage source. Varying the on-time of each controllable switch within a switching cycle controls the current through each coil. The magnetic suspension track coil power electronic amplifier with the fault-tolerant capability has two working modes, namely a normal working mode and a redundant working mode, and the two working modes can both provide normal suspension electromagnetic force. When the magnetic suspension track works in a normal working mode, if any one of the bridge arms is detected to have an open circuit fault, the magnetic suspension track is switched to a redundant working mode, and normal suspension of the magnetic suspension track is ensured.
Referring to fig. 3, an embodiment of the present invention provides a specific implementation of a fault detection method for a power electronic amplifier of a magnetic levitation track coil, where the method includes:
step 100: collecting the current of the first coil and the current of the second coil in real time;
step 200: carrying out fault detection on the power electronic amplifier of the magnetic suspension track coil according to the current of the first coil and the current of the second coil;
when the sum of the current of the first coil and the current of the second coil is larger than a preset current threshold value, judging that the power electronic amplifier of the magnetic suspension track coil is in short-circuit fault; and when the sum of the current of the first coil and the current of the second coil is smaller than a preset current threshold value, judging that the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault. When the power electronic amplifier of the magnetic suspension track coil is in short circuit fault, all the switch elements are blocked and the power supply is cut off; and when the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault, the power electronic amplifier of the magnetic suspension track coil is switched to a redundancy working mode.
Further, in step 100 and step 200, when the magnetic levitation track is normally levitated, the coil A is aligned1And coil A2Electricity (D) fromDetecting the flow size; coil A1And coil A2When the sum of the current values is larger than a certain threshold value, judging that the current magnetic suspension track coil power electronic amplifier is in a short-circuit fault condition, blocking all switch elements by a system, and cutting off a power supply to reduce the fault loss of the system; coil A1And coil A2When the sum of the current values is smaller than a certain threshold value, judging that the current magnetic suspension track coil power electronic amplifier is in an open-circuit fault condition, and switching to a redundant working mode to ensure the normal suspension of the magnetic suspension track; coil A1And coil A2When the sum of the current values is close to a normal value, the current magnetic suspension track coil power electronic amplifier is judged to be in a normal working condition.
In an embodiment, based on the topology of the magnetic levitation track coil power electronic amplifier, the normal operation mode of the magnetic levitation track coil power electronic amplifier is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted; the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
It can be understood that, based on the working device in the normal working mode, the current direction in the normal working mode flows from the middle bridge arm to the two side bridge arms, and based on the working device in the redundant working mode, the current direction in the redundant working mode flows from the two side bridge arms to the middle bridge arm, and the coil current directions in the two working modes are opposite.
Because the electromagnetic force generated by the electromagnet is irrelevant to the direction of the current in the coil, the suspension electromagnetic force generated in the normal working mode and the suspension electromagnetic force generated in the redundant working mode are not different in a steady state, and the two working modes can realize the stable suspension of the magnetic suspension track.
In one embodiment, referring to fig. 4, the method for detecting the fault of the power electronic amplifier of the levitation track coil further comprises:
step 300: when the magnetic suspension track is suspended normally, collecting the current of the first coil and the current of the second coil;
step 400: and generating a preset current threshold according to the current of the first coil and the current of the second coil.
It is understood that steps 300 and 400 are for calculating the required predetermined current threshold in step 200.
In one embodiment, referring to fig. 5, step 200 specifically includes:
step 201: when the power electronic amplifier of the magnetic suspension track coil is in short circuit fault, all the switch elements are blocked and the power supply is cut off;
step 202: and when the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault, the power electronic amplifier of the magnetic suspension track coil is switched to a redundancy working mode.
In step 300 and step 400, when the sum of the current of the first coil and the current of the second coil is greater than a preset current threshold, determining that the power electronic amplifier of the magnetic suspension track coil is in a short-circuit fault; and when the sum of the current of the first coil and the current of the second coil is smaller than a preset current threshold value, judging that the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault. When the power electronic amplifier of the magnetic suspension track coil is in short circuit fault, all the switch elements are blocked and the power supply is cut off; and when the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault, the power electronic amplifier of the magnetic suspension track coil is switched to a redundancy working mode.
As can be seen from the above description, an embodiment of the present invention provides a method for detecting a fault of a power electronic amplifier of a magnetic levitation track coil, where the method includes: collecting the current of the first coil and the current of the second coil in real time; and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
The fault detection method of the power electronic amplifier of the magnetic suspension track coil provided by the invention has fault-tolerant capability, can provide fault-tolerant operation capability when an open circuit fault occurs in the power electronic amplifier of the magnetic suspension track coil, ensures the normal suspension of the magnetic suspension track, and improves the safety and the robustness of the magnetic suspension track coil.
To further illustrate the scheme, the invention also provides a magnetic suspension track coil power electronic amplifier and a specific application example of the fault detection method thereof.
FIG. 6 is a diagram of a magnetic levitation track coil, coil A1And coil A2The electromagnets at the two sides are respectively enabled to generate electromagnetic attraction to control the relative position of the magnetic suspension track. The control usually adopts double-loop control, the outer loop is a position loop, the relative position signal of the rotor fed back by a position sensor is compared with a given position, and the inner loop exciting current instruction signal given by a controller is finally quickly tracked by a current loop, so that the effective control of the electromagnetic force is realized. The 2 coils generate the electromagnetic force required by the magnetic suspension track through corresponding coil current. Based on the principle, the power electronic amplifier of the magnetic levitation track coil provided by the specific application example comprises: the circuit comprises 6 diodes, 6 insulated gate bipolar transistors, 2 coils and 1 direct-current voltage source; as shown in fig. 1, the manner of interconnection has been explained above and will not be described again here.
Insulated gate bipolar transistor SP1Insulated gate bipolar transistor Sn1Insulated gate bipolar transistor SP2And an insulated gate bipolar transistor Sn2Controlling the passing coil A by varying its on-time1The current of (a); insulated gate bipolar transistor SP2Insulated gate bipolar transistor Sn2Insulated gate bipolar transistor SP3And an insulated gate bipolar transistor Sn3Controlling the passing coil A by varying its on-time2The current of (a); the 2 coils generate the electromagnetic force required by the magnetic suspension track through corresponding coil current.
In addition, the insulated gate bipolar transistor SP1Insulated gate bipolar transistor Sn1Insulated gate bipolar transistor SP2Insulated gate bipolar transistor Sn2Insulated gate bipolar transistor SP3And the insulated gate bipolar transistor Sn3Gate control ofThe control signals are pulse modulation signals with adjustable duty ratio.
On the other hand, the present embodiment also provides a method for detecting a fault of a power electronic amplifier of a magnetic levitation railway coil, and referring to fig. 7, the method specifically includes:
FIG. 8 is a schematic diagram of a normal operating mode of the magnetic levitation track coil power electronic amplifier with fault tolerance provided by the present invention (the solid line part represents circuit connection, and the dashed line part represents circuit disconnection), in which the normal operating mode is implemented by a diode DP1Insulated gate bipolar transistor Sn1Insulated gate bipolar transistor SP2Diode Dn2Diode DP3And an insulated gate bipolar transistor Sn3The current direction under the normal working mode is that the middle bridge arm flows to the two side bridge arms through the coils, and the current on the two coils provides the suspension electromagnetic force;
FIG. 9 is a schematic diagram of the redundant operation mode of the magnetic levitation railway coil power electronic amplifier with fault-tolerant capability provided by the invention, wherein the redundant operation mode is composed of an insulated gate bipolar transistor SP1Diode element Dn1Diode DP2Insulated gate bipolar transistor Sn2Insulated gate bipolar transistor SP3And a diode Dn3The current direction under the redundant working mode is that the bridge arms at two sides flow to the middle bridge arm through the coils, and the current on the two coils provides the suspension electromagnetic force;
s1: and generating a preset current threshold according to the current of the first coil and the current of the second coil.
Specifically, the current of the first coil and the current of the second coil during normal levitation of the magnetic levitation track are collected, and the sum of the current of the first coil and the current of the second coil is obtained as the preset current threshold in step S1.
S2: and acquiring the current of the first coil and the current of the second coil in real time.
S3: and carrying out fault detection on the power electronic amplifier of the magnetic suspension track coil according to the current of the first coil and the current of the second coil.
Specifically, referring to fig. 10, when the magnetic levitation track is normally levitated, the pair of coils a1And coil A2Detecting the current magnitude of the current; coil A1And coil A2Sum of current magnitudes of (I)1+I2) Greater than a certain threshold value Ilim1When the magnetic suspension track coil power electronic amplifier is in a short-circuit fault condition, the system blocks all the switch elements and cuts off the power supply to reduce the fault loss of the system; coil A1And coil A2Is less than a certain threshold value Ilim2When the magnetic suspension track coil power electronic amplifier is in an open-circuit fault condition, the current magnetic suspension track coil power electronic amplifier is switched to a redundancy working mode, and normal suspension of the magnetic suspension track is guaranteed; coil A1And coil A2When the sum of the current values is close to a normal value, the current magnetic suspension track coil power electronic amplifier is judged to be in a normal working condition.
In summary, compared with the prior art, the magnetic suspension track coil power electronic amplifier provided by the specific application example can obtain the following beneficial effects:
in the magnetic suspension track coil power electronic amplifier, usually can use the separation switch component to realize the three-phase full bridge controller, can also adopt the integrated power module to realize the three-phase full bridge circuit, each switch component has independent piecemeal in two kinds of structures, therefore the single switch component trouble can not influence other components, there is too big influence to the diode placed in parallel at the same time, the invention utilizes the characteristic of its topological structure, divide a set of complete three-phase bridge arm topology into two sets of structures that can finish the magnetic suspension track coil to suspend independently, when the single switch component trouble, still can utilize other remaining switch components to realize the stable control of the magnetic suspension track. When open-circuit fault occurs, the redundant working mode can be utilized to ensure that the system does not stop running, and the fault redundancy capability of the magnetic suspension track coil is effectively improved.
Based on the same inventive concept, the embodiment of the present application further provides a fault detection device of a power electronic amplifier of a magnetic levitation track coil, which can be used to implement the method described in the above embodiments, such as the following embodiments. The principle of solving the problems of the fault detection device of the power electronic amplifier of the magnetic suspension track coil is similar to the fault detection method of the power electronic amplifier of the magnetic suspension track coil, so the implementation of the fault detection device of the power electronic amplifier of the magnetic suspension track coil can refer to the implementation of the fault detection method of the power electronic amplifier of the magnetic suspension track coil, and repeated parts are not repeated. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
An embodiment of the present invention provides a specific implementation manner of a fault detection device capable of implementing a power electronic amplifier of a magnetic levitation railway coil, and referring to fig. 11, the fault detection device of the power electronic amplifier of the magnetic levitation railway coil specifically includes the following contents:
the first current collecting unit 10 is used for collecting the currents of the first coil and the second coil in real time;
and the fault detection unit 20 is used for carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
In one embodiment, the fault detection device for the power electronic amplifier of the magnetic levitation track coil further comprises:
the normal working mode of the power electronic amplifier of the magnetic suspension track coil is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted;
the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
In one embodiment, referring to fig. 12, the fault detection device of the power electronic amplifier of the magnetic levitation track coil further comprises:
the second current collecting unit 30 is used for collecting the current of the first coil and the current of the second coil when the magnetic levitation track is normally levitated;
a threshold generating unit 40, configured to generate a preset current threshold according to the current of the first coil and the current of the second coil.
In one embodiment, referring to fig. 13, the fault detection unit 20 includes:
a short circuit judgment module 201, configured to judge that the power electronic amplifier of the magnetic levitation track coil is in a short circuit fault;
and the open circuit judging module 202 is used for judging that the power electronic amplifier of the magnetic suspension track coil is in an open circuit fault.
In one embodiment, referring to fig. 14, the short circuit determining module 201 includes:
a power cut-off module 2011 for blocking all the switching elements and cutting off the power;
referring to fig. 15, the open-circuit determining module 202 includes:
and the redundant mode switching module 2021 is used for switching the magnetic levitation track coil power electronic amplifier into a redundant working mode.
As can be seen from the above description, the fault detection apparatus for the power electronic amplifier of the magnetic levitation track coil according to the embodiment of the present invention first collects the currents of the first coil and the second coil in real time; and then carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil. The fault detection device of the power electronic amplifier of the magnetic suspension track coil provided by the embodiment of the invention has fault-tolerant capability, can provide fault-tolerant operation capability when an open circuit fault occurs in the power electronic amplifier of the magnetic suspension track coil, ensures normal suspension of the magnetic suspension track, and has high safety and robustness of the magnetic suspension track coil.
The apparatuses, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or implemented by a product with certain functions. A typical implementation device is an electronic device, which may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
In a typical example, the electronic device specifically includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the steps of the method for detecting the failure of the power electronic amplifier of the magnetic levitation track coil, the steps including:
step 100: collecting the current of the first coil and the current of the second coil in real time;
step 200: and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
Referring now to FIG. 16, shown is a schematic diagram of an electronic device 600 suitable for use in implementing embodiments of the present application.
As shown in fig. 16, the electronic apparatus 600 includes a Central Processing Unit (CPU)601 that can perform various appropriate works and processes according to a program stored in a Read Only Memory (ROM)602 or a program loaded from a storage section 608 into a Random Access Memory (RAM)) 603. In the RAM603, various programs and data necessary for the operation of the system 600 are also stored. The CPU601, ROM602, and RAM603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output portion 607 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the I/O interface 605 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted as necessary on the storage section 608.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, an embodiment of the present invention includes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described method for fault detection of a magnetic levitation track coil power electronic amplifier, the steps comprising:
step 100: collecting the current of the first coil and the current of the second coil in real time;
step 200: and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (16)
1. A magnetic levitation track coil power electronic amplifier, comprising: six one-way switches, six controllable switches and two coils, wherein:
the six one-way breakover devices are respectively connected with the six controllable switches in parallel;
one end of the first unidirectional conductor is connected with one end of the first coil, and the other end of the first unidirectional conductor is connected with the positive electrode of the power supply;
one end of a second one-way conductor is connected with the other end of the first coil and one end of the second coil, and the other end of the second one-way conductor is connected with the positive electrode of the power supply;
one end of a third one-way conductor is connected with the other end of the second coil, and the other end of the third one-way conductor is connected with the positive electrode of the power supply;
one end of a fourth one-way conductor is connected with one end of the first coil, and the other end of the fourth one-way conductor is connected with the negative electrode of the power supply;
one end of a fifth one-way conductor is connected with the other end of the first coil, and the other end of the fifth one-way conductor is connected with the negative electrode of the power supply;
one end of a sixth one-way conductor is connected with the other end of the second coil, and the other end of the sixth one-way conductor is connected with the negative electrode of the power supply.
2. A magnetic levitation track coil power electronic amplifier as claimed in claim 1, wherein the six controllable switches are all of the type insulated gate bipolar transistors.
3. The maglev track coil power electronic amplifier of claim 2, wherein the six unidirectional conductors are all of the type of diodes.
4. A magnetic levitation track coil power electronic amplifier as claimed in claim 3,
the negative electrodes of the six diodes are respectively connected with the collectors of the six insulated gate bipolar transistors;
and the anodes of the six diodes are respectively connected with the emitting electrodes of the six insulated gate bipolar transistors.
5. A method for detecting the failure of a power electronic amplifier of a magnetic levitation railway coil, which is applied to the power electronic amplifier of the magnetic levitation railway coil of any one of claims 1 to 4,
collecting the current of the first coil and the current of the second coil in real time;
and carrying out fault detection on the power electronic amplifier of the magnetic levitation track coil according to the current of the first coil and the current of the second coil.
6. The method for fault detection of a power electronic amplifier of a magnetic levitation track coil as claimed in claim 5, further comprising:
the normal working mode of the power electronic amplifier of the magnetic suspension track coil is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted;
the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
7. The method for fault detection of a power electronic amplifier of a magnetic levitation track coil as claimed in claim 6, further comprising:
when the magnetic levitation track is normally levitated, collecting the current of the first coil and the current of the second coil;
and generating a preset current threshold according to the current of the first coil and the current of the second coil.
8. The method for detecting faults of a power electronic amplifier of a magnetic levitation track coil as claimed in claim 7, wherein the fault detection of the power electronic amplifier of the magnetic levitation track coil based on the current of the first coil and the current of the second coil comprises:
when the sum of the current of the first coil and the current of the second coil is greater than the preset current threshold, judging that the power electronic amplifier of the magnetic suspension track coil is in short-circuit fault;
and when the sum of the current of the first coil and the current of the second coil is smaller than the preset current threshold, judging that the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault.
9. The method for fault detection of a power electronic amplifier of a magnetic levitation track coil as claimed in claim 8, further comprising:
when the power electronic amplifier of the magnetic suspension track coil is in short circuit fault, all the switch elements are blocked and the power supply is cut off;
and when the power electronic amplifier of the magnetic suspension track coil is in an open-circuit fault, the power electronic amplifier of the magnetic suspension track coil is switched to a redundancy working mode.
10. A fault detection device for a power electronic amplifier of a magnetic levitation railway coil, which is applied to the power electronic amplifier of the magnetic levitation railway coil as claimed in any one of claims 1 to 4,
the first current acquisition unit is used for acquiring the currents of the first coil and the second coil in real time;
and the fault detection unit is used for carrying out fault detection on the power electronic amplifier of the magnetic suspension track coil according to the current of the first coil and the current of the second coil.
11. A fault detection device for a power electronic amplifier of a magnetic levitation track coil as claimed in claim 10, further comprising:
the normal working mode of the power electronic amplifier of the magnetic suspension track coil is as follows: a circuit formed by the first one-way conductor, the fourth controllable switch, the second controllable switch, the fifth one-way conductor, the third one-way conductor and the sixth controllable switch is conducted;
the redundant working modes of the power electronic amplifier of the magnetic suspension track coil are as follows: and a circuit formed by the first controllable switch, the fourth unidirectional conductor, the second unidirectional conductor, the fifth controllable switch, the third controllable switch and the sixth unidirectional conductor is conducted.
12. A fault detection arrangement for a power electronic amplifier of a magnetic levitation track coil as claimed in claim 11, further comprising:
the second current acquisition unit is used for acquiring the current of the first coil and the current of the second coil when the magnetic levitation track is normally levitated;
and the threshold value generating unit is used for generating a preset current threshold value according to the current of the first coil and the current of the second coil.
13. The fault detection device of a power electronic amplifier of a magnetic levitation track coil as claimed in claim 12, wherein the fault detection unit comprises:
the short circuit judgment module is used for judging that the power electronic amplifier of the magnetic suspension track coil is in short circuit fault;
and the open circuit judgment module is used for judging that the power electronic amplifier of the magnetic suspension track coil is in open circuit fault.
14. The apparatus for detecting the failure of the power electronic amplifier of the magnetic levitation track coil as claimed in claim 13, wherein the short circuit judging module comprises:
the power supply cut-off module is used for blocking all the switch elements and cutting off the power supply;
the open circuit judging module comprises:
and the redundancy mode switching module is used for switching the power electronic amplifier of the magnetic suspension track coil into a redundancy working mode.
15. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of the method for fault detection of a power electronic amplifier of a magnetic levitation track coil as claimed in any one of claims 5 to 9.
16. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for fault detection of a power electronic amplifier of a magnetic levitation track coil as claimed in any one of claims 5 to 9.
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| CN202011202100.4A CN112165309A (en) | 2020-11-02 | 2020-11-02 | Magnetic suspension track coil power electronic amplifier and fault detection method thereof |
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| CN202011202100.4A CN112165309A (en) | 2020-11-02 | 2020-11-02 | Magnetic suspension track coil power electronic amplifier and fault detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116498651A (en) * | 2023-04-21 | 2023-07-28 | 华中科技大学 | Switch short circuit fault tolerance control method and system for magnetic suspension bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116498651A (en) * | 2023-04-21 | 2023-07-28 | 华中科技大学 | Switch short circuit fault tolerance control method and system for magnetic suspension bearing |
| CN116498651B (en) * | 2023-04-21 | 2024-05-14 | 华中科技大学 | Switch short circuit fault tolerance control method and system for magnetic suspension bearing |
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