CN111086397B - Traction inverter main loop for permanent magnet synchronous traction system - Google Patents
Traction inverter main loop for permanent magnet synchronous traction system Download PDFInfo
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- CN111086397B CN111086397B CN201811219634.0A CN201811219634A CN111086397B CN 111086397 B CN111086397 B CN 111086397B CN 201811219634 A CN201811219634 A CN 201811219634A CN 111086397 B CN111086397 B CN 111086397B
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims description 40
- 238000002955 isolation Methods 0.000 claims description 38
- 230000001629 suppression Effects 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 101001080292 Homo sapiens Iron-sulfur cluster co-chaperone protein HscB Proteins 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/10—Electrical machine types
- B60L2220/14—Synchronous machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a traction inverter main loop for a permanent magnet synchronous traction system, comprising: the device comprises a power supply circuit, a main control circuit, a first circuit and a second circuit, wherein the power supply circuit is connected with one end of the main control circuit, the other end of the main control circuit is connected with the first circuit and the second circuit respectively, the first circuit and the second circuit are connected in parallel, the first circuit is connected with two first permanent magnet synchronous motors respectively, and the second circuit is connected with two second permanent magnet synchronous motors respectively; when the main control circuit detects that the power supply of the power supply circuit is abnormal, the main control circuit controls the power supply circuit to be disconnected with the first circuit and the second circuit; when the first circuit fails, the first circuit is disconnected from the main control circuit, or when the second circuit fails, the second circuit is disconnected from the main control circuit. According to the invention, the motors are driven by the first circuit and the second circuit respectively, so that the problem that faults can not be removed in time when the motors are driven by a single circuit is avoided, and the fault operation capability of the vehicle and the stability of the vehicle are improved.
Description
Technical Field
The invention relates to the field of electricity, in particular to a traction inverter main loop for a permanent magnet synchronous traction system.
Background
Rail vehicles are increasingly being used as urban vehicles, wherein the power system of the rail vehicle is generally a power traction system, and the traction system provides the required power and braking force for the train so as to ensure the normal running of the vehicle.
At present, most of power traction systems use an asynchronous Motor traction system, an asynchronous Motor is used as a power source, in view of the characteristics of the asynchronous Motor, a vehicle control mode of 1C (Converter) 4M (Motor) is generally adopted in a main circuit, namely, 4 traction motors are controlled by one inversion unit, the inversion unit is composed of IGBT (Insulated Gate Bipolar Transistor) elements, and the 1C4M vehicle control mode has a simple structure and high power density and can better provide power for a railway vehicle.
However, the above-mentioned 1C4M car control mode has some problems, because the 4 motors are controlled by one inversion unit to operate, once the inversion unit has problems, the 4 motors cannot normally operate, and the motors cannot provide a power source for the railway car when not operating, which can cause the power of the railway car to be greatly reduced or even directly stagnated in situ, and seriously affect the safety of the railway car and passengers.
Disclosure of Invention
The invention provides a traction inverter main loop for a permanent magnet synchronous traction system, which aims to solve the technical problem that in the prior art, the power of a railway vehicle is greatly reduced because the inverter circuit has a problem that a driving motor stops working completely.
The invention provides a traction inverter main loop for a permanent magnet synchronous traction system, comprising:
The device comprises a power supply circuit, a main control circuit, a first circuit and a second circuit, wherein the power supply circuit is connected with one end of the main control circuit, the other end of the main control circuit is respectively connected with the first circuit and the second circuit, the first circuit and the second circuit are connected in parallel, the first circuit is respectively connected with two first permanent magnet synchronous motors, and the second circuit is respectively connected with two second permanent magnet synchronous motors; when the main control circuit detects that the power supply of the power supply circuit is abnormal, the main control circuit controls the power supply circuit to be disconnected with the first circuit and the second circuit; when the first circuit fails, the first circuit is disconnected from the main control circuit, or when the second circuit fails, the second circuit is disconnected from the main control circuit.
Further, the first circuit includes: the device comprises a first control circuit, a first filter circuit, an inverter circuit and a detection piece; the first control circuit is respectively connected with the first filter circuit and the main control circuit, the output end of the first filter circuit is connected with the inverter circuit, the output end of the inverter circuit is connected with two first permanent magnet synchronous motors, the detection part is arranged on a three-phase connecting line of the output end of the inverter circuit and is used for detecting whether current in the first circuit is normal or not, and when the detection part detects that the current in the first circuit is abnormal, the first control circuit can control the first circuit to be disconnected with the main control circuit.
Further, the inverter circuit comprises a first inverter circuit and a second inverter circuit which are arranged in parallel, the detection part comprises a first detection part and a second detection part, the first inverter circuit is respectively connected with the first filter circuit and the first permanent magnet synchronous motor, and the first detection part is arranged on a three-phase connecting line between the first inverter circuit and the first permanent magnet synchronous motor; the second inverter circuit is respectively connected with the first filter circuit and the other first permanent magnet synchronous motor, and the second detection part is arranged on a three-phase connecting line between the second inverter circuit and the first permanent magnet synchronous motor.
Further, the first control circuit includes: the first precharge circuit is respectively connected with the main control circuit and the first filter circuit, and is used for controlling the on-off of the inverter circuit; when the first detection part detects that the output current of the first inverter circuit exceeds a preset threshold value, or when the second detection part detects that the output current of the second inverter circuit exceeds the preset threshold value, the first pre-charge and discharge circuit can control the first circuit to be disconnected from the main control circuit.
Further, the first control circuit further includes: and the first overvoltage suppression circuit is respectively connected with the first filter circuit and the inverter circuit.
Further, the first filter circuit includes: the first direct current filter reactor is connected with the first charge-discharge circuit and the first overvoltage suppression circuit respectively, and the first filter capacitor is connected with the first overvoltage suppression circuit, the first inverter circuit and the second inverter circuit respectively.
Further, the first circuit further includes: the first motor isolation circuit is respectively connected with the first inverter circuit and one first permanent magnet synchronous motor; the second motor isolation circuit is respectively connected with the second inverter circuit and the other first permanent magnet synchronous motor.
Further, the second circuit includes: the device comprises a main control circuit, a first filter circuit, a first inverter circuit, a second inverter circuit, a third inverter circuit and a fourth inverter circuit, wherein the first control circuit is connected with the main control circuit and the first filter circuit respectively, and the first filter circuit is connected with the first control circuit, the third inverter circuit and the fourth inverter circuit respectively.
Further, the second circuit further includes: the device comprises a third detection piece, a fourth detection piece, a third motor isolation circuit and a fourth motor isolation circuit, wherein the third motor isolation circuit is respectively connected with the third inverter circuit and one second permanent magnet synchronous motor, and the fourth motor isolation circuit is respectively connected with the fourth inverter circuit and the other second permanent magnet synchronous motor; the third detection piece is arranged on a three-phase connecting line between the third motor isolation circuit and the third inverter circuit, and the fourth detection piece is arranged on a three-phase connecting line between the fourth motor isolation circuit and the fourth inverter circuit; the second control circuit includes: a second precharge and discharge circuit and a second overvoltage suppression circuit, the second filter circuit comprising: the second pre-charge and discharge circuit is respectively connected with the main control circuit and the second direct current filter reactor, the second overvoltage suppression circuit is respectively connected with the second direct current filter reactor and the second filter capacitor, and the second filter capacitor is respectively connected with the second overvoltage suppression circuit, the third inverter circuit and the fourth inverter circuit.
Further, the method further comprises the following steps: and the voltage detection circuit is respectively connected with the power supply circuit, the first circuit and the second circuit.
The invention provides a traction inverter main loop for a permanent magnet synchronous traction system, comprising: the power supply circuit is used for providing electric energy for the main control circuit, the first circuit and the second circuit, the main control circuit is used for controlling the on-off between the first circuit and the second circuit and the power supply circuit, the first circuit and the second circuit are both used for controlling the operation of the permanent magnet synchronous motor, two permanent magnet synchronous motors are respectively controlled in the first circuit and the second circuit, the first circuit and the second circuit are both in a conducting state during normal operation, when one of the circuits is abnormal, the abnormal circuit can be automatically disconnected and stops working, and the other circuit continues working. In the prior art, the motors are generally asynchronous motors, one inversion unit controls 4 asynchronous motors to operate, when the inversion unit has a problem, the 4 motors are all stopped, the 4 asynchronous motors are in a serial state, one of the motors is abnormal and can also influence other motors, so that the fault can not be completely removed in time once the motor fails, and the whole traction system is abnormal. Compared with the prior art, the traction inverter main loop provided by the invention has the advantages that as the first circuit and the second circuit respectively control the operation of the respective synchronous motors, one of the synchronous motors can be automatically disconnected when a problem occurs, and the fault is completely removed, so that the performance of the traction inverter main loop is lost by half at most, the fault operation capability is greatly improved, and the traction inverter main loop can still operate stably when a circuit fault occurs in a railway vehicle.
Drawings
Fig. 1 is a schematic circuit connection diagram of a traction inverter main loop for a permanent magnet synchronous traction system according to the present invention;
fig. 2 is a circuit connection diagram of a traction inverter main loop for a permanent magnet synchronous traction system according to the present invention;
FIG. 3 is a schematic diagram of a first circuit connection of a traction inverter main loop for a permanent magnet synchronous traction system according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a partial circuit connection of a traction inverter main circuit for a permanent magnet synchronous traction system according to another embodiment of the present invention;
Fig. 5 is a second circuit connection diagram of a traction inverter main loop for a permanent magnet synchronous traction system according to another embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The power traction system of the rail vehicle can be generally divided into an asynchronous traction system and a permanent magnet synchronous traction system, the two types of the drive motor are asynchronous motor or synchronous motor, the permanent magnet synchronous traction system has the characteristics of high efficiency, light weight and low maintenance, the development needs of national economy and low carbon economy are met, a technical solution is provided for realizing the environment-friendly rail transportation, but the application of the permanent magnet synchronous traction system in the rail transportation industry is still in a popularization stage, the main circuit of the current permanent magnet synchronous traction system is formed by reforming the asynchronous traction system, the fault operation capability of the permanent magnet synchronous traction system is difficult to truly realize, the main circuit in the system is an asynchronous traction system in a 1C4M car control mode, the main circuit in the system is controlled by an inverter unit, but the mode has the defects that when the inverter unit is in a problem, 4 motors cannot normally operate, the inverter unit mainly plays a role of converting current, the current is in a continuously changing state, the processing of the inverter unit is in a state, the main motor is the most difficult to realize the fault operation capability of the main motor in the inverter unit, the main motor is extremely difficult to control the overload state, the main motor is extremely difficult to normally down, the overload condition of the main motor is very bad, the main motor is extremely difficult to normally down, the overload condition of the main motor is difficult to normally-run, and the overload condition is very bad, the main motor is difficult to normally down the main motor is in the condition of the overload condition is well, and the overload condition is very bad, and the main motor is difficult to be well down by the main motor is caused by the main motor, and the overload condition is very high down condition, the vehicle control mode has the advantages that only rescue can be waited, the safety of railway vehicles and passengers can be seriously affected, meanwhile, in order to drive 4 motors, the inversion units in the vehicle control mode main circuit are required to have larger capacity, and the control circuits in front of the corresponding inversion units also need larger capacity, so that the type selection of circuit components is difficult, and therefore, the vehicle control mode has more defects.
In order to solve the above-described problems, as shown in fig. 1 and 2, the present embodiment provides a traction inverter main circuit 1 for a permanent magnet synchronous traction system, including: the power supply circuit 10, the main control circuit 11, the first circuit 12 and the second circuit 13, the power supply circuit 10 is mainly used for providing electric energy for the follow-up main control circuit 11, the first circuit 12 and the second circuit 13, the power supply circuit 10 is communicated with the main control circuit 11, the main control circuit 11 mainly controls the on-off between the first circuit 12 and the second circuit 13 and the power supply circuit 10, when the main control circuit 11 detects that the power supply circuit 10 is abnormal in power supply, the main control circuit 11 controls the first circuit 12 and the second circuit 13 to be disconnected with the power supply circuit 10, the first circuit 12 and the second circuit 13 are prevented from being damaged due to the abnormal power supply of the power supply circuit 10, when the first circuit 12 is in a problem, the first circuit 12 is disconnected with the main control circuit 11, the power supply circuit 10 stops supplying power to the first circuit 12 continuously, the first circuit 12 stops working, and when the second circuit 13 is in a problem, the second circuit 13 is disconnected from the main control circuit 11, the power supply circuit 10 stops supplying power to the second circuit 13, so that the second circuit 13 stops working, the first circuit 12 and the second circuit 13 are connected in parallel to the main control circuit 11, so that the disconnection of the first circuit 12 or the second circuit 13 alone does not affect one of the continuous working, wherein the first circuit 12 is connected with two first permanent magnet synchronous motors 14, the second circuit 13 is connected with two second permanent magnet synchronous motors 15, unlike the prior art, the motor controlled in the embodiment is a permanent magnet synchronous motor, and generally 4 motors are needed for driving a railway vehicle, therefore, the first circuit 12 is respectively connected with two first permanent magnet synchronous motors 14, the second circuit 13 is respectively connected with two second permanent magnet synchronous motors 15, during normal working, the first circuit 12 and the second circuit 13 are in an electrified conduction state, the 4 permanent magnet synchronous motors are all in normal operation, when one of the first circuit 12 or the second circuit 13 is abnormal, the first circuit 12 or the second circuit 13 with the abnormality stops working, and the other passage is in operation at the moment, that is, the other passage is in continuous operation, namely, the power of the railway vehicle is lost to a half at most, the complete loss of power caused by the complete stop of the operation of the motors is not caused, and the probability of the simultaneous occurrence of faults of the first circuit 12 and the second circuit 13 is low.
The present embodiment provides a traction inverter main circuit 1 for a permanent magnet synchronous traction system, including: the power supply circuit 10, the main control circuit 11, the first circuit 12 and the second circuit 13, the power supply circuit 10 is used for providing electric energy for the main control circuit 11, the first circuit 12 and the second circuit 13, the main control circuit 11 is used for controlling the on-off between the first circuit 12 and the second circuit 13 and the power supply circuit 10, the first circuit 12 and the second circuit 13 are both used for controlling the operation of the permanent magnet synchronous motor, wherein the first circuit 12 and the second circuit 13 respectively control two permanent magnet synchronous motors, during normal operation, the first circuit 12 and the second circuit 13 are both in a conducting state, when one of the circuits is abnormal, the abnormal circuit is automatically disconnected and stops working, and the other circuit continues working. In the prior art, the motors are generally asynchronous motors, one inversion unit controls 4 asynchronous motors to operate, when the inversion unit has a problem, the 4 motors are all stopped, the 4 asynchronous motors are in a serial state, one of the motors is abnormal and can also influence other motors, so that the fault can not be completely removed in time once the motor fails, and the whole traction system is abnormal. Compared with the prior art, the traction inverter main circuit 1 provided by the invention has the advantages that as the first circuit 12 and the second circuit 13 respectively control the operation of the respective synchronous motors, one of the synchronous motors can be automatically disconnected when a problem occurs, and the fault is completely removed, so that the performance of the traction inverter main circuit 1 is lost by half at most, the fault operation capability is greatly improved, and the traction inverter main circuit can still operate stably when a circuit fault occurs in a railway vehicle.
Further, in the present embodiment, as shown in fig. 3, the first circuit 12 includes: the first control circuit 121, the first filter circuit 122, the inverter circuit and the detecting element, wherein, the first control circuit 121 is connected with the main control circuit 11, the first control circuit 121 is different from the main control circuit 11, when the first control circuit 121 detects that the first circuit 12 is abnormal, the first control circuit 12 is disconnected with the main control circuit 11, the main control circuit 11 controls the power supply circuit 10 to be disconnected with the first circuit 12 or the second circuit 13 when the power supply circuit 10 is detected to be abnormal, the first circuit 12 and the second circuit 13 are connected in parallel with the main control circuit 11, therefore, the main control circuit 11 is a main switch in the circuit, the first control circuit 121 is a separate switch of the first circuit 12, the first filter circuit 122 is respectively connected with the first control circuit 121 and the inverter circuit, the first filter circuit 122 has the function of reducing alternating current components in the pulsating direct current voltage as far as possible before the power supply voltage enters the inverter circuit, reducing the ripple coefficient of the output voltage, the waveform becomes comparatively, the voltage enters the permanent magnet motor after the filter circuit to be processed, and the permanent magnet motor is simultaneously subjected to the function of protecting the permanent magnet motor after the filter circuit is subjected to the filtering processing, and the permanent magnet motor is also capable of preventing the permanent magnet motor from flowing into the inverter circuit 121 to be synchronous to be detected and the synchronous, and the detecting element is also capable of preventing the synchronous motor from being in the synchronous with the detecting fault.
Further, in this embodiment, the inverter circuit in the first circuit 12 includes a first inverter circuit 123 and a second inverter circuit 126 that are disposed in parallel, the detecting element also includes a first detecting element 124 and a second detecting element 127, the first inverter circuit 123 and the second inverter circuit 126, that is, the inverter units are main functional circuits in the circuit, for converting direct current into alternating current to drive the permanent magnet synchronous motor to operate, the first inverter circuit 123 and the second inverter circuit 126 are all three-phase full-bridge voltage type inverter circuits composed of 6 IGBT elements, because the motor controlled in the embodiment is a permanent magnet synchronous motor, unlike an asynchronous motor, the permanent magnet synchronous motor is a synchronous motor that generates a synchronous rotating magnetic field by permanent magnet excitation, and the inherent characteristics of the motor determine that the first permanent magnet synchronous motor can only be controlled by one inverter circuit, and the first circuit 12 needs to control two first permanent magnet synchronous motors 14, therefore, in the first circuit 12, the first inverter circuit 123 is respectively connected to the first filter circuit 122 and the first permanent magnet synchronous motor 14, the first detecting element 124 is disposed between the first inverter circuit 14 and the second inverter circuit 14, and the second inverter circuit 126 are respectively connected to the other three-phase synchronous motor 14 by the first inverter circuit 126, and the other three-phase synchronous motor is disposed between the first inverter circuit 14 and the second inverter circuit 14.
It should be noted that, in this embodiment, the first inverter circuit 123 or the second inverter circuit 126 respectively controls one first permanent magnet synchronous motor 14 to operate, which greatly reduces both the inverter processing capacity and the capacity of the circuit itself for the first inverter circuit 123 or the second inverter circuit 126, and simultaneously, the capacities of auxiliary supporting circuits of the first inverter circuit 123 and the second inverter circuit 126 also reduce, so that the capacity of the entire first circuit 12 is reduced, and more selection spaces are provided on the component selection in the circuit, whereas in the prior art, the processing capacity and the capacity of the main circuit are larger, the number of selectable components on the component selection is very small, and some components are difficult to select due to larger specifications or even need to be customized, so that the cost is greatly increased.
Further, in this embodiment, as shown in fig. 4, the first control circuit 121 includes a first pre-charge-discharge circuit 1211, the first pre-charge-discharge circuit 1211 is respectively connected to the main control circuit 11 and the filter circuit, the first pre-charge-discharge circuit 1211 is used for controlling the on-off of the inverter circuit, and when the first detecting element 124 detects that the output current of the first inverter circuit 123 exceeds the preset threshold value, or when the second detecting element 127 detects that the output current of the second inverter circuit 126 exceeds the preset threshold value, the first pre-charge-discharge circuit 1211 controls the first circuit 12 to be disconnected from the main control circuit 11. Specifically, when the power supply circuit 10 starts to supply power to the first circuit 12, first, when the LB11 and LB12 in the first precharge and discharge circuit 1211 are in an off state, the LB11 in the first precharge and discharge circuit 1211 is closed, and the LB12 is still open, at this time, the CHRe1 starts to charge and closes until the LB12 after reaching the start voltage, the LB11 is open, the power supply circuit 10 starts to supply power to the inverter circuit through the first precharge and discharge circuit 1211, and when the first circuit 12 is abnormal, specifically, when the first detecting member 124 detects that the output of the first inverter circuit 123 is abnormal, that is, the output current after inversion exceeds a preset threshold value, the LB12 in the first precharge and discharge circuit 1211 is open, or when the second detecting member 127 detects that the output current of the second inverter circuit 126 is abnormal, the LB12 in the first precharge and discharge circuit 1211 is also open, at this time, that is, when one of the first detecting member 124 or the second detecting member 127 detects that the first precharge circuit 12 is abnormal, the first circuit 1211 is completely discharged.
Further, in this embodiment, the first control circuit 121 further includes a first overvoltage suppression circuit 1212, the first overvoltage suppression circuit 1212 is respectively connected to the first filter circuit 122 and the inverter circuit, the first overvoltage suppression circuit 1212 plays a role of suppressing voltage, when the voltage provided by the first filter circuit 122 exceeds a preset threshold value, the LB12 in the first precharge and discharge circuit 1211 is disconnected, so that the first circuit 12 and the power supply circuit 10 are disconnected, at this time, the OVTr in the first overvoltage suppression circuit 1212 is turned on, the OVRe and OVTr1 work together to start discharging until the voltage in the first circuit 12 is restored to a normal state, the discharging is ended, the OVTr is disconnected, and the first overvoltage suppression circuit 1212 ends working.
Further, in the present embodiment, the first filter circuit 122 includes: the first dc filter reactor 1221 and the first filter capacitor 1222, wherein the first dc filter reactor 1221 is connected in series in the circuit and is connected to the first pre-charge/discharge circuit 1211 and the first overvoltage suppression circuit 1212, respectively, the first dc filter reactor 1221 can limit the ac component superimposed on the dc current to a certain predetermined value, reduce the current ripple value, improve the input power factor, and suppress the harmonic wave generated by the inverter device, the first filter capacitor 1222 is connected in parallel in the circuit, the first filter capacitor 1222 is connected in parallel between the output end of the first overvoltage suppression circuit 1212 and the input end of the inverter circuit, and the inverter circuit is divided into the first inverter circuit 123 and the second inverter circuit 126 connected in parallel, and therefore, the input ends of the first inverter circuit 123 and the second inverter circuit 126 are connected to the first filter capacitor 1222, and the first filter capacitor 1222 is used for reducing the ac ripple coefficient and smoothing the dc output, and thus the current processed by the first filter capacitor 1222 directly enters the first inverter circuit 123 and the second inverter circuit 126.
Further, in this embodiment, the first circuit 12 further includes a first motor isolation circuit 125 and a second motor isolation circuit 128, where the first detection element 124 is disposed between the first motor isolation circuit 125 and the first permanent magnet synchronous motor 14, the second motor isolation circuit 128 is connected between the second detection element 127 and the other first permanent magnet synchronous motor 14, the first motor isolation circuit 125 and the second motor isolation circuit 128 are both used to control on-off of the first permanent magnet synchronous motor 14, specifically, when an abnormal condition such as overheat overload occurs in the operation process of the first permanent magnet synchronous motor 14, the first detection element 124 or the second detection element 127 detects the abnormal condition and controls the first motor isolation circuit 125 or the second motor isolation circuit 128 to disconnect from the abnormal permanent magnet synchronous motor, so that the abnormal permanent magnet synchronous motor stops working, and the counter electromotive force of the permanent magnet synchronous motor is isolated, wherein the first detecting member 124 and the second detecting member 127 are current detecting members, the three-phase output sides of the first inverter circuit 123 and the second inverter circuit 126 are provided with current detecting sensors, output signals of the sensors can be used for detecting output currents for overcurrent and overload protection, practically, abnormality related to current and voltage in the first circuit 12 can be detected, the detecting members comprise overvoltage and undervoltage, driving faults, controller faults, contactor faults of the first control circuit and motor faults which are all in the detecting range of the detecting members, once the detecting members detect that abnormality occurs in the first circuit 12, the first control circuit 121 firstly controls the first circuit 12 and the power supply circuit 10 to be disconnected, the faults are isolated and discharged, and the permanent magnet synchronous motor is used after the fault elements are waited to be overhauled or directly replaced, the first motor isolation circuit 125 and the second motor isolation circuit 128 also function to isolate the power supply, and when the circuit ceases to operate, the first motor isolation circuit 125 and the second motor isolation circuit 128 will open to isolate the first permanent magnet synchronous motor 14 from the power supply when no current is present in the circuit.
In this embodiment, the power supply circuit 10 specifically includes two parts, one part is a pantograph PAN, the direct current is provided by the pantograph PAN, the direct current provided by the pantograph PAN is special power electricity and mainly provides electric energy for a permanent magnet synchronous motor, the other part is a stationary inverter SIV and mainly provides electric energy for electric equipment such as an air conditioner and a lamp in a railway vehicle, the traction inverter main circuit 1 does not work when the railway vehicle is in an initial state, i.e. is not running, the main control circuit 11 is in an open state, at this time, the stationary inverter SIV is firstly turned on to electrify the railway vehicle, at this time, the traction inverter main circuit 1 performs self-checking, when everything is normal, the high-speed breaker HSCB in the main control circuit 11 is firstly turned on, the first pre-charge discharging circuit 1211 and the second pre-charge discharging circuit 1311 start to work, the LB12 and the LB22 are turned on, then the KM1, KM2, KM3 and KM4 are turned off, the power supply circuit 10 starts to supply power and drive the permanent magnet synchronous motor through inversion, and the railway vehicle starts running.
Further, in the present embodiment, as shown in fig. 5, the second circuit 13 includes: the second control circuit 131, the second filter circuit 132, the third inverter circuit 133 and the fourth inverter circuit 136, wherein the second control circuit 131 is respectively connected with the main control circuit 11 and the second filter circuit 132, and when the second circuit 13 is abnormal, the second control circuit 131 controls the second circuit 13 to be disconnected with the main control circuit 11, and the second filter circuit 132 is respectively connected with the second control circuit 131, the third inverter circuit 133 and the fourth inverter circuit 136.
Further, the second circuit 13 further includes: the third motor isolation circuit 135, the fourth motor isolation circuit 138, the third detecting element 135 and the fourth detecting element 138, the third motor isolation circuit 135 is connected with the third inverter circuit 133 and one second permanent magnet synchronous motor 15 respectively, the third detecting element 135 is arranged on a three-phase connection line between the third motor isolation circuit 135 and the third inverter circuit 133, when the second permanent magnet synchronous motor 15 is abnormal, the third detecting element 135 controls the third motor isolation circuit 135 to be disconnected, the second permanent magnet synchronous motor 15 stops working, the fourth motor isolation circuit 138 is connected with the fourth inverter circuit 136 and the other second permanent magnet synchronous motor 15 respectively, the fourth detecting element 136 is arranged on the three-phase connection line between the fourth motor isolation circuit 138 and the fourth inverter circuit 136, when the other second permanent magnet synchronous motor 15 is abnormal, the fourth detecting element 138 controls the fourth motor isolation circuit 138 to be disconnected, so that the other second permanent magnet synchronous motor 15 stops working, and the second control circuit 131 comprises: a second precharge and discharge circuit 1311 and a second overvoltage suppression circuit 1312, the second filter circuit 132 includes: the second dc filter reactor 1321 and the second filter capacitor 1322, the second precharge and discharge circuit 1311 is connected to the main control circuit 11 and the second dc filter reactor 1321, respectively, the second overvoltage suppression circuit 1312 is connected to the second dc filter reactor 1321 and the second filter capacitor 1322, respectively, and the second filter capacitor 1322 is connected to the second overvoltage suppression circuit 1312, the third inverter circuit 133, and the fourth inverter circuit 136, respectively.
In this embodiment, the first circuit 12 and the second circuit 13 have the same circuit structure, so that the second control circuit 131, the second filter circuit 132, the third inverter circuit 133, the fourth inverter circuit 136, the third detecting element 135, the fourth detecting element 138, the third motor isolating circuit 135 and the fourth motor isolating circuit 138 in the second circuit 13 function identically to the first control circuit 121, the first filter circuit 122, the first inverter circuit 123, the second inverter circuit 126, the first detecting element 124, the second detecting element 127, the first motor isolating circuit 125 and the second motor isolating circuit 128 in the first circuit 12, and the first circuit 12 and the second circuit 13 can realize the same circuit functions, the circuit compositions and the connection are the same, meanwhile, the first circuit 12 and the second circuit 13 are connected in parallel to the main control circuit 11, when one of the main control circuit 11 is cut off, the other one which is not cut off is not affected by any influence, so that the design is adopted, in order to be modularized, the first circuit 12 and the second circuit 13 can be replaced with each other, the first circuit 12 or the second circuit 13 is made into the same circuit module, thus being beneficial to replacing modularized circuits when the circuit has a problem, meanwhile, the main control circuit 11 can correspondingly control more circuit modules, each circuit module comprises two inversion units, and can be made into a module which only comprises one inversion unit, but in view of cost, the circuit module in the embodiment comprises two inversion units, because the circuit module does not only comprise the inversion units but also other matched circuits, therefore, in this embodiment, the circuit modules including two inverter units are preferably used and the number of the circuit modules is two, so that the circuit modules can be actually increased according to the actual requirements of the site, but the two circuit modules can meet the actual requirements of the railway vehicle, and the advantages of using the two circuit modules are also included in the design of the circuit structure, so that the design of the design structure is designed, the overall heat dissipation of the circuit is facilitated, and the probability of faults of the circuit is further reduced.
Further, in this embodiment, the method further includes: the voltage detection circuit 111, one end of the voltage detection circuit 111 is connected to the main control circuit 11, the voltage detection circuit 111 is respectively connected to the power supply circuit 10, the first circuit 12 and the second circuit 13, the voltage detection circuit 111 is mainly used for detecting the voltage of the output end of the power supply circuit 10, and when detecting that the voltage is abnormal, the main control circuit 11 controls the first circuit 12 and the second circuit 13 to be disconnected from the power supply circuit 10.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. A traction inverter main circuit for a permanent magnet synchronous traction system, comprising:
The device comprises a power supply circuit, a main control circuit, a first circuit and a second circuit, wherein the power supply circuit is connected with one end of the main control circuit, the other end of the main control circuit is respectively connected with the first circuit and the second circuit, the first circuit and the second circuit are connected in parallel, the first circuit is respectively connected with two first permanent magnet synchronous motors, and the second circuit is respectively connected with two second permanent magnet synchronous motors;
When the main control circuit detects that the power supply of the power supply circuit is abnormal, the main control circuit controls the power supply circuit to be disconnected with the first circuit and the second circuit;
when the first circuit fails, the first circuit is disconnected with the main control circuit, or when the second circuit fails, the second circuit is disconnected with the main control circuit;
the first circuit includes: the device comprises a first control circuit, a first filter circuit, an inverter circuit and a detection piece;
the first control circuit is respectively connected with the first filter circuit and the main control circuit, the output end of the first filter circuit is connected with the inverter circuit, the output end of the inverter circuit is connected with the two first permanent magnet synchronous motors, the detection part is arranged on a three-phase connecting line of the output end of the inverter circuit and is used for detecting whether the current in the first circuit is normal or not, and when the detection part detects that the current in the first circuit is abnormal, the first control circuit can control the first circuit to be disconnected with the main control circuit;
The inverter circuit comprises a first inverter circuit and a second inverter circuit which are arranged in parallel, the detection piece comprises a first detection piece and a second detection piece, wherein the first inverter circuit is respectively connected with the first filter circuit and the first permanent magnet synchronous motor, and the first detection piece is arranged on a three-phase connecting line between the first inverter circuit and the first permanent magnet synchronous motor;
The second inverter circuit is respectively connected with the first filter circuit and the other first permanent magnet synchronous motor, and the second detection part is arranged on a three-phase connecting line between the second inverter circuit and the first permanent magnet synchronous motor;
The second circuit includes: the second control circuit is respectively connected with the main control circuit and the second filter circuit, and the second filter circuit is respectively connected with the second control circuit, the third inverter circuit and the fourth inverter circuit;
The second circuit further includes: the device comprises a third detection piece, a fourth detection piece, a third motor isolation circuit and a fourth motor isolation circuit, wherein the third motor isolation circuit is respectively connected with the third inverter circuit and one second permanent magnet synchronous motor, and the fourth motor isolation circuit is respectively connected with the fourth inverter circuit and the other second permanent magnet synchronous motor;
the third detection piece is arranged on a three-phase connecting line between the third motor isolation circuit and the third inverter circuit, and the fourth detection piece is arranged on a three-phase connecting line between the fourth motor isolation circuit and the fourth inverter circuit;
The second control circuit includes: a second precharge and discharge circuit and a second overvoltage suppression circuit, the second filter circuit comprising: the second pre-charge and discharge circuit is respectively connected with the main control circuit and the second direct current filter reactor, the second overvoltage suppression circuit is respectively connected with the second direct current filter reactor and the second filter capacitor, and the second filter capacitor is respectively connected with the second overvoltage suppression circuit, the third inverter circuit and the fourth inverter circuit.
2. The traction inverter main circuit of a permanent magnet synchronous traction system of claim 1, wherein the first control circuit comprises: the first pre-charge and discharge circuit is respectively connected with the main control circuit and the first filter circuit and is used for controlling the on-off of the inverter circuit;
When the first detection part detects that the output current of the first inverter circuit exceeds a preset threshold value, or when the second detection part detects that the output current of the second inverter circuit exceeds the preset threshold value, the first pre-charge and discharge circuit can control the first circuit to be disconnected from the main control circuit.
3. The traction inverter main circuit of a permanent magnet synchronous traction system of claim 2, wherein the first control circuit further comprises: and the first overvoltage suppression circuit is respectively connected with the first filter circuit and the inverter circuit.
4. The traction inverter main circuit of a permanent magnet synchronous traction system of claim 3, wherein the first filter circuit comprises: the first direct current filter reactor is connected with the first pre-charge and discharge circuit and the first overvoltage suppression circuit respectively, and the first filter capacitor is connected with the first overvoltage suppression circuit, the first inverter circuit and the second inverter circuit respectively.
5. The traction inverter main circuit of a permanent magnet synchronous traction system of claim 4, wherein the first circuit further comprises: the first motor isolation circuit is respectively connected with the first inverter circuit and one first permanent magnet synchronous motor;
the second motor isolation circuit is respectively connected with the second inverter circuit and the other first permanent magnet synchronous motor;
The first motor isolation circuit is connected between the first detection piece and one first permanent magnet synchronous motor, and the second motor isolation circuit is connected between the second detection piece and the other first permanent magnet synchronous motor.
6. The traction inverter main circuit of a permanent magnet synchronous traction system of claim 5, further comprising: and the voltage detection circuit is respectively connected with the power supply circuit, the first circuit and the second circuit.
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| CN201811219634.0A CN111086397B (en) | 2018-10-19 | 2018-10-19 | Traction inverter main loop for permanent magnet synchronous traction system |
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| CN201811219634.0A CN111086397B (en) | 2018-10-19 | 2018-10-19 | Traction inverter main loop for permanent magnet synchronous traction system |
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| CN209426581U (en) * | 2018-10-19 | 2019-09-24 | 西安中车永电捷通电气有限公司 | A kind of traction invertor major loop for permanent magnet synchronous traction system |
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| JP4987495B2 (en) * | 2007-01-25 | 2012-07-25 | 株式会社東芝 | Motor drive system for rail car drive |
| JP5481088B2 (en) * | 2009-04-03 | 2014-04-23 | 株式会社東芝 | Railway vehicle drive control device |
| CN101834552B (en) * | 2010-05-21 | 2012-05-30 | 株洲南车时代电气股份有限公司 | Permanent magnet synchronous traction system of trunk high-speed vehicle |
| CN105790597A (en) * | 2016-03-29 | 2016-07-20 | 中车永济电机有限公司 | Main circuit of traction converter of PMSMs (Permanent magnet synchronous motors) for high speed railway |
| CN108429491B (en) * | 2018-03-14 | 2021-03-16 | 长安大学 | Fault-tolerant control system and method for double permanent magnet synchronous motors |
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| CN209426581U (en) * | 2018-10-19 | 2019-09-24 | 西安中车永电捷通电气有限公司 | A kind of traction invertor major loop for permanent magnet synchronous traction system |
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