CN109617224B - Redundant power supply of train intelligent control system - Google Patents
Redundant power supply of train intelligent control system Download PDFInfo
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- CN109617224B CN109617224B CN201811474487.1A CN201811474487A CN109617224B CN 109617224 B CN109617224 B CN 109617224B CN 201811474487 A CN201811474487 A CN 201811474487A CN 109617224 B CN109617224 B CN 109617224B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/146—Arrangements for reducing ripples from dc input or output using discharge tubes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a redundant power supply of an intelligent train control system, which comprises: first power, second power, the control unit includes: the device comprises a signal sampling unit, a signal active filtering unit, a first subtracter, a second subtracter, a first comparator and a second comparator; the output voltage signal of the first power supply is respectively connected with the positive terminal of the first subtracter and the negative phase input terminal of the second subtracter, the output voltage of the second power supply is respectively connected with the inverting input terminal of the first subtracter and the positive phase input terminal of the second subtracter, the output terminal of the first subtracter is connected with the positive phase input terminal of the first comparator, the output terminal of the second subtracter is connected with the positive phase input terminal of the second comparator, the inverting input terminals of the first comparator and the second comparator are connected with a voltage source, and the output terminals of the first comparator and the second comparator are respectively connected with the MOS tube. The invention effectively reduces the power source error switching caused by the complex electromagnetic environment interference in the train intelligent control system.
Description
Technical Field
The invention relates to the technical field of train power supplies, in particular to a redundant power supply of an intelligent train control system.
Background
In the train intelligent control system, the train traction and braking are intelligently controlled by the vehicle-mounted curing information and the ground information, so that the train is in the optimal automatic running state, and the train running efficiency is improved. The safe, right-point, energy-saving and stable running of the train is realized, the crash labor intensity is reduced, and the driving safety is improved.
Most of power supplies in the existing train intelligent control system adopt a single power supply for supplying power, and a few of power supplies adopt a dual-power redundant power supply mode but cannot realize accurate control over dual power supplies.
Because the train intelligent control system is an important part in the auxiliary control of the train and has higher requirements on reliability and stability, and because the electromagnetic environment of the train is worse and the ripple waves on a power supply are more complex, the invention is used
Disclosure of Invention
The invention provides a redundant power supply of an intelligent train control system to overcome the problems.
The invention discloses a redundant power supply of an intelligent train control system, which comprises:
a power supply unit and a control unit, the power supply unit including: the first power supply, the second power supply, the control unit include: a first subtractor and a second subtractor for detecting an output voltage difference of the first power supply and the second power supply, a first comparator and a second comparator for comparing the voltage difference;
the voltage output end of the first power supply is respectively connected with the positive end of the first subtracter and the negative phase input end of the second subtracter, the output voltage of the second power supply is respectively connected with the reverse phase input end of the first subtracter and the positive phase input end of the second subtracter, the output end of the first subtracter is connected with the positive phase input end of the first comparator, the output end of the second subtracter is connected with the positive phase input end of the second comparator, the reverse phase input end of the first comparator and the reverse phase input end of the second comparator are connected with a voltage source, and the output end of the first comparator and the output end of the second comparator are respectively connected with an MOS (metal oxide semiconductor) tube.
Further, still include:
the signal sampling unit and the signal active filtering unit are arranged between the power supply unit and the control unit:
the signal sampling unit includes: the voltage dividing resistor comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;
the signal active filtering unit includes: the filter capacitor C1, electric capacity C2, first resistance R1 one end with the output of first power is connected, the first resistance R1 other end with the positive terminal of first subtracter, second resistance R2 one end and first electric capacity C1 one end are connected, the second resistance R2 other end with first electric capacity C1 other end ground.
Further, still include:
an active filtering unit disposed between the first and second subtractors and the first and second comparators, the active filtering unit including: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5 and a sixth capacitor C6;
one end of the fifth resistor is connected with the output end of the first subtractor, the other end of the fifth resistor is connected with one end of the sixth resistor and one end of the third capacitor, the other end of the third capacitor is grounded, the other end of the sixth resistor is connected with the positive input end of the first comparator and one end of the fourth capacitor, the other end of the fourth capacitor is grounded, one end of the eighth resistor is connected with the output end of the first comparator, the other end of the eighth resistor is connected with the negative output end of the first comparator and one end of the seventh resistor, and the other end of the seventh resistor is grounded;
one end of the ninth resistor is connected with the output end of the second subtractor, the other end of the ninth resistor is connected with one end of the tenth resistor and one end of the fifth capacitor, the other end of the fifth capacitor is grounded, the other end of the tenth resistor is connected with the positive phase input end of the second comparator and one end of the sixth capacitor, the other end of the sixth capacitor is grounded, one end of the twelfth resistor is connected with the output end of the second comparator, the other end of the twelfth resistor is connected with the negative output end of the second comparator and one end of the eleventh resistor, and the other end of the eleventh resistor is grounded.
Further, still include:
the common mode/differential mode overcurrent and overvoltage protection unit and the common mode/differential mode filtering unit are arranged at the input ends of the first power supply and the second power supply;
the common mode/differential mode overcurrent and overvoltage protection unit comprises: the power supply comprises a restorable fuse F1, a first piezoresistor RV1, a second piezoresistor RV2, a third piezoresistor RV3, a first discharge tube D1 and a second discharge tube D2, wherein the input end of the restorable fuse is connected with the input anode of a power supply, the output end of the restorable fuse is connected with one end of the piezoresistor, the other end of the piezoresistor is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the input cathode of the power supply;
the recoverable safety output end is also connected with one end of a second piezoresistor, the other end of the second piezoresistor is connected with one end of a second discharge tube after being connected with one end of a third piezoresistor in parallel, the other end of the second discharge tube is grounded, and the other end of the third piezoresistor is connected with the negative input end of a power supply;
the filtering circuit unit includes: a first-order common mode and differential mode filter circuit and a second-order filter network;
the first order common mode and differential mode filter circuit includes: a fourth capacitor CY1, a fifth capacitor CY2, and an eighth capacitor CX 1;
one end of the fourth capacitor CY1 is connected to the fuse output end and one end of an eighth capacitor CX1, the other end of the fourth capacitor CY1 is connected to one end of the fifth capacitor CY2 in parallel and then grounded, the other end of the fifth capacitor CY2 is connected to the negative input end of the power supply, and the other end of the eighth capacitor CX1 is connected to the negative input end of the power supply;
the second order filter network comprises: a common-mode inductor L1, a ninth capacitor CX2, a sixth capacitor CY3, and a seventh capacitor CY 4;
common mode inductance L1 input respectively with fuse output, power negative input end are connected, common mode inductance's output with ninth electric capacity CX 2's both ends are connected, common mode inductance's output still is connected with sixth electric capacity CY3 one end, seventh electric capacity CY4 one end, sixth electric capacity CY3 with seventh electric capacity CY 4's the other end is ground connection after parallelly connecting.
According to the invention, through DC-DC conversion, signal sampling and signal active filtering, the difference value of two power supplies is made by the subtracter for the signal, and then the voltage source is used as a comparison point, the voltage source can adjust the preset value of the comparator, so that power supply error switching caused by electromagnetic environment interference is effectively reduced, the power supply can operate more stably and reliably, and the driving safety is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 schematic diagram of a redundant power supply structure of an intelligent train control system according to the present invention;
FIG. 2 is a block diagram of a control unit according to the present invention;
FIG. 3 is a schematic diagram of the working principle of the redundant power supply of the intelligent control system of the train of the invention;
FIG. 4 is a schematic diagram of the working principle of the redundant power supply control unit of the intelligent control system of the train of the invention;
FIG. 5 is a schematic diagram of a signal sampling unit according to the present invention;
FIG. 6 is a schematic diagram of a signal filtering unit according to the present invention;
fig. 7 is a schematic diagram of a common mode/differential mode overcurrent and overvoltage protection unit and a common mode/differential mode filtering unit according to the present 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.
Fig. 1 is a schematic structural diagram of a redundant power supply of an intelligent train control system according to the present invention, and as shown in fig. 1, the redundant power supply of this embodiment may include:
a power supply unit 101 and a control unit 102, the power supply unit comprising: the first power supply 103, the second power supply 104, the control unit include: a first subtractor 105 and a second subtractor 106 for detecting the output voltage difference of the first power supply and the second power supply, a first comparator 107 and a second comparator 108 for comparing the voltage difference, and outputting and controlling the corresponding MOS tube after comparison;
as shown in fig. 2, the voltage output end of the first power supply is connected to the positive terminal of the first subtractor and the negative input end of the second subtractor, the output voltage of the second power supply is connected to the inverting input end of the first subtractor and the non-inverting input end of the second subtractor, the output end of the first subtractor is connected to the non-inverting input end of the first comparator, the output end of the second subtractor is connected to the non-inverting input end of the second comparator, the inverting input ends of the first comparator and the second comparator are connected to a voltage source, and the output ends of the first comparator and the second comparator are connected to MOS transistors.
Specifically, the signal comparison unit is composed of a subtracter and a comparator, and the PS1 signal conditioning PS1-1 is connected to the positive end of the first subtracter and simultaneously connected to the negative end of the second subtracter. The PS2 signal conditioning PS2-1 is connected to the negative terminal of the first subtracter, and is connected to the positive terminal of the second subtracter. The two subtractors output the difference between PS1 and PS2, PS1-2 and PS2-2, respectively. PS1-2 and PS2-2 enter positive terminals of the first comparator and the second comparator, respectively, and negative terminals of the two comparators are connected with a voltage source. When PS1 is greater than PS2 by a certain difference (PS1-2), PS1-2 is greater than PS1-3, and if it is less than PS 383, it outputs low. When PS2 is greater than PS1 by a certain difference (PS2-2), PS2-2 is greater than PS2-3, and if it is less than PS 383, it outputs low. The comparator is used for converting the analog signal into the switching value signal and has the characteristics of high switching speed, short delay time and the like. The power output module mainly comprises a Schmitt trigger, an MOS tube driving circuit and an MOS tube. Signals PS1-3 and PS2-3 enter a Schmitt trigger for shaping and filtering, respectively control two triode driving circuits to drive respective MOS (metal oxide semiconductor) tubes, and finally output to provide a stable and reliable high-quality power supply for a rear-end system.
Further, as shown in fig. 4, the method further includes:
the signal sampling unit and the signal active filtering unit are arranged between the power supply unit and the control unit:
the signal sampling unit includes: the voltage dividing resistor comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;
the signal active filtering unit includes: the filter capacitor C1, electric capacity C2, first resistance R1 one end with the output of first power is connected, the first resistance R1 other end with the positive terminal of first subtracter, second resistance R2 one end and first electric capacity C1 one end are connected, the second resistance R2 other end with first electric capacity C1 other end ground.
Specifically, as shown in fig. 5, the authenticity of the signal is ensured by adopting high precision, the signal is subjected to voltage division and then is filtered through C1 and C2, the processed signal is connected with a follower consisting of an operational amplifier, a resistor precision voltage division resistor network conditions a signal with a higher front end into a smaller signal, meanwhile, an interference signal at the upper end of a power supply is attenuated, and the signal passes through the attenuated signal, so that the signal impedance is improved.
The external power input passes through common mode/differential mode overcurrent and overvoltage protection unit and common mode/differential mode filtering unit and enters DC-DC module for voltage conversion, and two groups of power of PS1 and PS2 are output and enter signal sampling unit, which includes: the signal sampling unit and the signal active filter circuit mainly use a special instrument operational amplifier and are characterized by high precision, low offset voltage, low offset drift, low noise, low input bias current and the like. The PS1 and PS2 signals are high for the input of the signal sampling unit circuit, firstly, the signals are attenuated and conditioned and then enter an active filter circuit formed by an operational amplifier, and the active filter circuit is mainly used for filtering useless frequency components in the signals. The PS1 and the PS2 enter the signal control unit after being processed by the signal sampling unit and the active filtering unit.
Further, still include:
an active filtering unit disposed between the first and second subtractors and the first and second comparators, the active filtering unit including: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5 and a sixth capacitor C6;
one end of the fifth resistor is connected with the output end of the first subtractor, the other end of the fifth resistor is connected with one end of the sixth resistor and one end of the third capacitor, the other end of the third capacitor is grounded, the other end of the sixth resistor is connected with the positive input end of the first comparator and one end of the fourth capacitor, the other end of the fourth capacitor is grounded, one end of the eighth resistor is connected with the output end of the first comparator, the other end of the eighth resistor is connected with the negative output end of the first comparator and one end of the seventh resistor, and the other end of the seventh resistor is grounded;
one end of the ninth resistor is connected with the output end of the second subtractor, the other end of the ninth resistor is connected with one end of the tenth resistor and one end of the fifth capacitor, the other end of the fifth capacitor is grounded, the other end of the tenth resistor is connected with the positive phase input end of the second comparator and one end of the sixth capacitor, the other end of the sixth capacitor is grounded, one end of the twelfth resistor is connected with the output end of the second comparator, the other end of the twelfth resistor is connected with the negative output end of the second comparator and one end of the eleventh resistor, and the other end of the eleventh resistor is grounded.
Specifically, as shown in fig. 6, the signal has a filtering unit, the signal active filtering circuit is disposed between the sampling unit and the control unit, and the signal active filtering unit includes a resistor, a capacitor network, and an integrated operational amplifier. Signals PS1 'and PS 2' output by the signal sampling unit form a resistor-capacitor network through R5, R6, R7, R8, C3 and C4, the resistor-capacitor network is connected to the positive end of an operational amplifier, the negative end of the operational amplifier is connected to ground through R7 and R8, the output end of the operational amplifier is connected with a feedback resistor, the other end of the resistor is connected to the negative end of the operational amplifier, and signals are PS1 'and PS 2' through an active filter, so that a circuit formed by the circuit can pass low-frequency signals and has a restraining effect on high-frequency signals, and the signals are smoother.
Further, as shown in fig. 3, the method further includes:
the common mode/differential mode overcurrent and overvoltage protection unit and the common mode/differential mode filtering unit are arranged at the input ends of the first power supply and the second power supply;
specifically, as shown in fig. 7, the common mode/differential mode overcurrent and overvoltage protection unit includes: the power supply comprises a restorable fuse F1, a first piezoresistor RV1, a second piezoresistor RV2, a third piezoresistor RV3, a first discharge tube D1 and a second discharge tube D2, wherein the input end of the restorable fuse is connected with the input anode of a power supply, the output end of the restorable fuse is connected with one end of the piezoresistor, the other end of the piezoresistor is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the input cathode of the power supply;
the recoverable safety output end is also connected with one end of a second piezoresistor, the other end of the second piezoresistor is connected with one end of a second discharge tube after being connected with one end of a third piezoresistor in parallel, the other end of the second discharge tube is grounded, and the other end of the third piezoresistor is connected with the negative input end of a power supply;
the filtering circuit unit includes: a first-order common mode and differential mode filter circuit and a second-order filter network;
the first order common mode and differential mode filter circuit includes: a fourth capacitor CY1, a fifth capacitor CY2, and an eighth capacitor CX 1;
one end of the fourth capacitor CY1 is connected to the fuse output end and one end of an eighth capacitor CX1, the other end of the fourth capacitor CY1 is connected to one end of the fifth capacitor CY2 in parallel and then grounded, the other end of the fifth capacitor CY2 is connected to the negative input end of the power supply, and the other end of the eighth capacitor CX1 is connected to the negative input end of the power supply;
the second order filter network comprises: a common-mode inductor L1, a ninth capacitor CX2, a sixth capacitor CY3, and a seventh capacitor CY 4;
common mode inductance L1 input respectively with fuse output, power negative input end are connected, common mode inductance's output with ninth electric capacity CX 2's both ends are connected, common mode inductance's output still is connected with sixth electric capacity CY3 one end, seventh electric capacity CY4 one end, sixth electric capacity CY3 with seventh electric capacity CY 4's the other end is ground connection after parallelly connecting.
Specifically, the external power input passes through the recoverable safety overcurrent protection device, and the piezoresistor and the discharge tube form a common-mode voltage protection unit and a differential-mode voltage protection unit so as to protect the rear-end device from being damaged by the impact of external large current and high voltage. The eighth capacitor CX1 and the ninth capacitor CX2 are X-type safety capacitors, and the fourth capacitor CY1, the fifth capacitor CY2, the sixth capacitor CY3 and the seventh capacitor CY4 are Y-type safety capacitors and common-mode inductors to form a second-order filter network, which respectively filter common-mode and differential-mode interference, thereby suppressing EMI conducted interference. The X-type safety capacitor is a polyester film capacitor with large ripple current, the size of the capacitor is large, but the current which allows instantaneous charging and discharging is also large, and the internal resistance of the capacitor is correspondingly small. The capacitance of the Y-type safety capacitor must be limited, so as to achieve the purpose of controlling the magnitude of leakage current flowing through the Y-type safety capacitor under the action of rated frequency and rated voltage and influencing the EMC performance of a system. The common mode inductor is used for playing an EMI filtering role and is used for inhibiting electromagnetic waves generated by the high-speed signal wire from radiating and emitting outwards.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The utility model provides a redundant power of train intelligence control system which characterized in that includes:
a power supply unit and a control unit, the power supply unit including: the first power supply, the second power supply, the control unit include: a first subtractor and a second subtractor for detecting an output voltage difference of the first power supply and the second power supply, a first comparator and a second comparator for comparing the voltage difference;
the voltage output end of the first power supply is respectively connected with the positive end of the first subtracter and the negative phase input end of the second subtracter, the output voltage of the second power supply is respectively connected with the reverse phase input end of the first subtracter and the positive phase input end of the second subtracter, the output end of the first subtracter is connected with the positive phase input end of the first comparator, the output end of the second subtracter is connected with the positive phase input end of the second comparator, the reverse phase input end of the first comparator and the reverse phase input end of the second comparator are connected with a voltage source, and the output end of the first comparator and the output end of the second comparator are respectively connected with an MOS (metal oxide semiconductor) tube.
2. The redundant power supply of the intelligent control system of the train as claimed in claim 1, further comprising:
the signal sampling unit and the signal active filtering unit are arranged between the power supply unit and the control unit:
the signal sampling unit includes: the voltage dividing resistor comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;
the signal active filtering unit includes: the first capacitor C1 and the capacitor C2, one end of the first resistor R1 is connected with the output end of the first power supply, the other end of the first resistor R1 is connected with the positive electrode end of the operational amplifier, one end of the second resistor R2 and one end of the first capacitor C1, and the other end of the second resistor R2 is grounded with the other end of the first capacitor C1.
3. The redundant power supply of the intelligent control system of the train as claimed in claim 1, further comprising:
an active filtering unit disposed between the sampling unit and the control unit, the active filtering unit including: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5 and a sixth capacitor C6;
one end of the fifth resistor is connected with the negative end of the operational amplifier, the other end of the fifth resistor is connected with one end of the sixth resistor and one end of the third capacitor, the other end of the third capacitor is grounded, the other end of the sixth resistor is connected with the positive input end of the operational amplifier and one end of the fourth capacitor, the other end of the fourth capacitor is grounded, one end of the eighth resistor is connected with the output end of the operational amplifier, the other end of the eighth resistor is connected with the negative output end of the operational amplifier and one end of the seventh resistor, and the other end of the seventh resistor is grounded;
one end of the ninth resistor is connected with the negative end of the operational amplifier, the other end of the ninth resistor is connected with one end of the tenth resistor and one end of the fifth capacitor, the other end of the fifth capacitor is grounded, the other end of the tenth resistor is connected with the positive input end of the operational amplifier and one end of the sixth capacitor, the other end of the sixth capacitor is grounded, one end of the twelfth resistor is connected with the output end of the operational amplifier, the other end of the twelfth resistor is connected with the negative output end of the operational amplifier and one end of the eleventh resistor, and the other end of the eleventh resistor is grounded.
4. The redundant power supply of the intelligent control system of the train as claimed in claim 1, further comprising:
the common mode/differential mode overcurrent and overvoltage protection unit and the common mode/differential mode filtering unit are arranged at the input ends of the first power supply and the second power supply;
the common mode/differential mode overcurrent and overvoltage protection unit comprises: the power supply comprises a restorable fuse F1, a first voltage dependent resistor RV1, a second voltage dependent resistor RV2, a third voltage dependent resistor RV3, a first discharge tube D1 and a second discharge tube D2, wherein the input end of the restorable fuse is connected with the input anode of the power supply, the output end of the restorable fuse is connected with one end of the voltage dependent resistor, the other end of the voltage dependent resistor is connected with one end of the discharge tube, and the other end of the discharge tube is connected with the input cathode of the power supply;
the recoverable safety output end is also connected with one end of a second piezoresistor, the other end of the second piezoresistor is connected with one end of a second discharge tube after being connected with one end of a third piezoresistor in parallel, the other end of the second discharge tube is grounded, and the other end of the third piezoresistor is connected with the negative input end of a power supply;
the filtering circuit unit includes: a first-order common mode and differential mode filter circuit and a second-order filter network;
the first order common mode and differential mode filter circuit includes: a fourth capacitance CY1, a fifth capacitance CY2, an eighth capacitance CX 1;
one end of the fourth capacitor CY1 is connected with one end of a fuse output end and one end of an eighth capacitor CX1, the other end of the fourth capacitor CY1 is connected with one end of the fifth capacitor CY2 in parallel and then grounded, the other end of the fifth capacitor CY2 is connected with a negative input end of a power supply, and the other end of the eighth capacitor CX1 is connected with the negative input end of the power supply;
the second order filter network comprises: a common-mode inductor L1, a ninth capacitor CX2, a sixth capacitor CY3, and a seventh capacitor CY 4;
common mode inductance L1 input is connected with fuse output, power negative input respectively, common mode inductance's output with ninth electric capacity CX 2's both ends are connected, common mode inductance's output still with sixth electric capacity CY3 one end, seventh electric capacity CY4 one end is connected, sixth electric capacity CY3 with ground connection after seventh electric capacity CY 4's the other end is parallelly connected.
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| CN109617224A (en) | 2019-04-12 |
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Inventor after: Duan Tonglei Inventor after: Zhang Haoyan Inventor after: Zhang Haoyu Inventor after: Guan Ying Inventor after: Chen Chuang Inventor after: Jiang Zheng Inventor after: Yu Jian Inventor after: Chen Guangtai Inventor before: Duan Tonglei Inventor before: Zhang Haoyan Inventor before: Zhang Haoyu |