CN109936208A - The control method and control circuit for preventing urban rail unsteady flow emergency power supply from burning - Google Patents
The control method and control circuit for preventing urban rail unsteady flow emergency power supply from burning Download PDFInfo
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Abstract
A kind of control method and control circuit for preventing urban rail unsteady flow emergency power supply from burning, by improving the input voltage range of emergency power supply and the ability to bear and promotion emergency power supply of jump frequency to the adaptability of external exception signals and working environment, urban rail unsteady flow emergency power supply is prevented to be burned out at work.The input voltage range and the ability to bear of jump frequency of improving is primary transform circuit using flyback topologies structure, and the transformer primary side series connection of multi-stage transformation circuit, secondary side are in parallel.The promotion power supply is by preventing the methods of input signal reversal connection, MCU logic control, secondary logical circuit, output signal isolation amplification from promoting power supply to the processing capacity of external exception signals to the processing capacity of external exception signals.The present invention can effectively avoid urban rail current transformer emergency power supply from burning.
Description
Technical field
The present invention relates to a kind of improvement of urban rail component controls mode, and in particular to one kind prevents urban rail unsteady flow emergency power supply
The control method and control circuit burnt, the control method and control circuit that this kind prevents urban rail unsteady flow emergency power supply from burning can be with
The heat dissipation performance for effectively improving emergency power supply prevents urban rail unsteady flow emergency power supply from burning.
Background technique
Urban rail traction current transformation emergency power supply system be for Vehicular accumulator cell failure in the case where provided for traction current transformation system
Temporary source；Wherein, emergency power supply is the critical component in urban rail traction current transformation emergency power supply system, and vehicle can be guaranteed in length
Time park or battery break down when carry out emergency service, to ensure train traffic safety.Currently, we are domestic due to answering
Urgent telegram source is different from the design concept of conventional power source, and design difficulty is big, and operating condition is complicated especially in this power supply practical application, so
Emergency power supply in our domestic urban rail traction current transformation emergency power supply systems takes state's external power more, and major brand is Sweden
Powerbox, German sieve in heptan etc..Powerbox power supply occurs that a large amount of " water and soil is not in the application environment of urban rail current transformer at home
Phenomena such as the phenomenon that clothes ", i.e. emergency power supply, burn when starting.
In actual use it was found that in urban rail market at home, due to our domestic grid power quality problems,
Causing current all urban rail current transformers to occur emergency power supply on a large scale can not start, no-load standby overheat, and when emergency starting burns
Situations such as ruining, if Guangzhou mind railway traction equipment Co., Ltd proposes, their current transformer on No. 9 lines of Guangzhou Underground answers urgent telegram
Source is not available, and product is the import power supply of powerbox company, emergency power supply is burnt out when powering on, and can not solve at present.
So even be import power supply, though it is at high price, due to being used in environment at home, can also break down again and again, and one
Denier goes wrong, and the service of external power supplier, state tends not to provide repair service in time, it is difficult to ensure that replaced in time,
To influence the normal operation of vehicle；So existing market urgent need can solve problem and cheap production domesticization product.
By patent retrieval do not find have with the patent literature report of same technique of the present invention, have certain relationship with the present invention
Patent mainly have it is following:
1, number of patent application CN201810597115, it is entitled " a kind of rail traffic emergency power system and control method ",
Applicant are as follows: the application for a patent for invention of Southwest Jiaotong University, which disclose a kind of rail traffic emergency power systems and control
Method processed belongs to rail traffic power supply technique field；The method of the present invention mainly includes EMU emergency power system matched design
With hybrid power energy control method, which mainly includes fuel cell system, energy storage device and energy hole
Device etc..Matched design mainly according under working line, vehicle parameter under EMU contingency mode power and energy be constraint item
Part carries out matched design by objective function of volume cost, obtains a kind of scheme of EMU emergency power system.
2, number of patent application CN201610780526, entitled " emergency power supply unit and the rail mounted with it arrange
Vehicle ", applicant are as follows: the application for a patent for invention of middle vehicle Qingdao four directions rolling stock limited liability company, which disclose one kind
Emergency power supply unit and rail mounted train with it, emergency power supply unit includes: mobile power source；Power supply interface, with movement
Power electric connection, power supply interface are that main circuit breaker interface, air-boost compressor interface, auxiliary power interface and pantograph connect
At least one of mouthful；Control circuit is arranged on the circuit that mobile power source is connect with power supply interface, for the logical of control circuit
It is disconnected.
3, number of patent application CN201520543290, it is entitled " a kind of rail traffic vehicles in emergency power supply unit ",
Applicant are as follows: the utility application of nine Fang Hongxin traffic equipment Co., Ltd of Beijing, which disclose a kind of tracks
Emergency power supply unit in vehicular traffic, including inverter, the input terminal of inverter are provided with protection circuit, and inverter is also connected with
For controlling the controller of inverter output, controller includes DSP control module, and DSP control module is connected with analog input
Processing module, On-off signal processing module and output switch parameter processing module；Analog input processing module, for acquire and
The output voltage of medium voltage and inverter after converting the input voltage of inverter, being controlled via DSP control module；Switching value
Input processing module is handled for the input signal to IGBT in inverter, and monitors the operation shape of emergency power supply unit
State；Output switch parameter processing module, for alternating current control output, simultaneous real-time monitoring inverter output state is controlled by DSP
Molding block is scanned monitoring.Big to solve maintenance difficulties existing in the prior art, disunity of powering, output voltage is unstable
The problem of.
4, number of patent application CN201610780526, entitled " emergency power supply unit and the rail mounted with it arrange
Vehicle ", applicant are as follows: the application for a patent for invention of middle vehicle Qingdao four directions rolling stock limited liability company, which disclose one kind
By carefully analyzing to these above-mentioned patents, although these patents are directed to emergency power supply system or emergency power supply,
It also proposed some improved technology schemes, but by carefully analyzing, these proposed answer urgent telegram about emergency power supply system
Source can not all not start without effectively solving emergency power supply, and no-load standby overheat, when emergency starting burns, makes in environment at home
With, the problem of emergency power supply can also break down again and again, therefore still need further to be studied.
Summary of the invention
The technical problem to be solved by the present invention is proposing a kind of new control for preventing urban rail current transformer emergency power supply from burning
Method and circuit.It effectively solves in urban rail market at present at home, due to our domestic grid power quality problems, causes
There is emergency power supply on a large scale in current all urban rail current transformers to be started, no-load standby overheat, and when emergency starting burns
Problem.
Technical solution proposed by the present invention is: a kind of control method for preventing urban rail unsteady flow emergency power supply from burning, by mentioning
The ability to bear of high emergency power supply input voltage range and jump frequency, and emergency power supply is promoted to external exception signals and work
The adaptability for making environment, prevents emergency power supply to be burned out.
Further, the emergency power supply input voltage range and the ability to bear of jump frequency of improving is primary transform circuit
Using circuit of reversed excitation topological structure, the ability to bear of input voltage range and jump frequency is promoted.
Further, the method that the primary transform circuit uses multi-stage cascade partial pressure reduces the electricity that every primary circuit is born
Pressure；The method that the primary transform electricity uses multi-stage cascade partial pressure is that the main transformer in primary transform circuit is connected using primary side, secondary
Side is in parallel；The main transformer uses synchronously driven method.
Further, the emergency power supply input voltage range and the ability to bear of jump frequency of improving is to input signal
It is filtered.
Further, the promotion emergency power supply, which refers to the adaptability of external exception signals and working environment, passes through inspection
The temperature for surveying external signal voltage and current value and running environment, passes through the judgement of secondary logical circuit and the logic control of MCU
System is realized in external signal or running environment exception, implements the guard method shut down to emergency power supply.
Further, the method for the detection external signal voltage and current value is to detect the voltage value of output signal；It is described
The method of detection external signal voltage and current value is to detect the current value or the detection external signal voltage and current of output signal
The method of value is to detect the current value of input signal.
Further, the promotion emergency power supply refers to the adaptability of external exception signals and working environment anti-
Only external input signal is reversely connected and power supply is caused to burn.
Further, the promotion emergency power supply be to the adaptability of external exception signals and working environment will be outer
The method that portion's signal and internal electric signal take electrical isolation；It is described by external signal and internal electric signal take electrically every
From method be by MCU logic control output signal by isolation amplification after drive translation circuit in transformer, secondary is patrolled
The output signal and MCU logic control signal collected take Phototube Coupling.
A kind of control circuit for preventing urban rail current transformer emergency power supply from burning, which is characterized in that primary transform circuit is using anti-
Excitation circuit topological structure, the primary transform circuit are divided using multi-stage cascade；The primary transform circuit stages cascade partial pressure is main
The primary side of transformer in translation circuit, which is connected, to be divided, secondary side parallel output.
It further, further include input signal filter circuit and the anti-circnit NOT of input；It further include secondary logical circuit, every
From amplification driving circuit and photoelectric isolating circuit；The secondary logical circuit includes thermal-shutdown circuit, output overvoltage guarantor
Protection circuit, output overcurrent protection circuit, battery logic judging circuit, input over-voltage detection circuit.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the raising emergency power supply input electricity
The ability to bear of pressure range and jump frequency is primary transform circuit using circuit of reversed excitation topological structure, promoted input voltage range with
And the ability to bear of jump frequency.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the primary transform circuit is using multistage
The method for cascading partial pressure reduces the voltage that every primary circuit is born.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the primary transform electricity is using multistage grade
The method of connection partial pressure is that the main transformer in primary transform circuit is connected using primary side, and secondary side is in parallel.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the main transformer are driven using synchronous
Dynamic method.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the raising emergency power supply input electricity
The ability to bear for pressing range and jump frequency is that input signal is filtered.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply is to outside
The adaptability of abnormal signal and working environment refers to the temperature by detection external signal voltage and current value and running environment,
By the judgement of secondary logical circuit and the logic control of MCU, realize in external signal or running environment exception, it is corresponding
Implement the guard method shut down in urgent telegram source.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the voltage value of output signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the current value of output signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the current value of input signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply pair
The adaptability of external exception signals and working environment, which refers to, prevents external input signal to be reversely connected and power supply is caused to burn.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply pair
The adaptability of external exception signals and working environment is the method that external signal and internal electric signal are taken electrical isolation.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, it is described by external signal and inside electricity
The method that gas signal takes electrical isolation is to drive MCU logic control output signal in translation circuit after isolation amplification
Transformer.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, it is described by external signal and inside electricity
The method that gas signal takes electrical isolation is that the output signal of secondary logical and MCU logic control signal are taken Phototube Coupling.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, which is characterized in that primary transform
Circuit uses circuit of reversed excitation topological structure, and the primary transform circuit is divided using multi-stage cascade.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, the primary transform circuit are more
Grade cascade partial pressure is the primary side series connection partial pressure of the transformer in primary transform circuit, secondary side parallel output.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning further includes input signal filter
Wave circuit and the anti-circnit NOT of input.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning further includes secondary logical electricity
Amplification driving circuit and photoelectric isolating circuit is isolated in road.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, the secondary logical circuit
Including thermal-shutdown circuit, output overvoltage protection circuit, output overcurrent protection circuit, battery logic judging circuit, inputted
Press detection circuit.
The invention has the advantages that
The present invention is by primary transform circuit stages cascade partial pressure and promotes power supply to external signal and working environment abnormality processing
Ability has the advantage that
1, connected using multiple independent transformers partial pressure, the highest voltage of transformation of a transformer control in 440V hereinafter,
This is a very common Switching Power Supply input voltage to 440V, can greatly reduce the voltage that single transformer is born；
2, by detection operating ambient temperature, input/output signal voltage and current value judges external signal or working environment
It determines whether power supply can continue to work normally whether normal, can effectively prevent mutation or building ring of the power supply because of external signal
Border is abnormal and burns.
3, anti-reverse by input signal filtering and input signal, energy effective means input signal is because of jump on a large scale
Or positive and negative anodes reversal connection inputs and power supply is caused to burn.
4, by that by external input signal, output signal and MCU logic control signal Phototube Coupling, can effectively prevent because outer
Portion's signal interference and cause internal circuit operation irregularity or burn.
Detailed description of the invention
Fig. 1 is the structural block diagram of system of the invention；
Fig. 2 is the translation circuit figure of 5 grades of series transformers of the invention；
Fig. 3 is filtering processing circuit diagram of the invention.
Specific embodiment
The description of a step is done to the present invention below with reference to embodiment and attached drawing.
Embodiment one
As shown in Figure 1-3, a kind of control circuit for preventing urban rail current transformer emergency power supply from burning, which is characterized in that primary transform electricity
Road uses circuit of reversed excitation topological structure, and the primary transform circuit is divided using multi-stage cascade；The primary transform circuit stages cascade
Partial pressure is the primary side series connection partial pressure of the transformer in primary transform circuit, secondary side parallel output.
It further, further include input signal filter circuit and the anti-circnit NOT of input；It further include secondary logical circuit, every
From amplification driving circuit and photoelectric isolating circuit；The secondary logical circuit includes thermal-shutdown circuit, output overvoltage guarantor
Protection circuit, output overcurrent protection circuit, battery logic judging circuit, input over-voltage detection circuit.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the raising emergency power supply input electricity
The ability to bear of pressure range and jump frequency is primary transform circuit using circuit of reversed excitation topological structure, promoted input voltage range with
And the ability to bear of jump frequency.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the primary transform circuit is using multistage
The method for cascading partial pressure reduces the voltage that every primary circuit is born.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the primary transform electricity is using multistage grade
The method of connection partial pressure is that the main transformer in primary transform circuit is connected using primary side, and secondary side is in parallel.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the main transformer are driven using synchronous
Dynamic method.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the raising emergency power supply input electricity
The ability to bear for pressing range and jump frequency is that input signal is filtered.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply is to outside
The adaptability of abnormal signal and working environment refers to the temperature by detection external signal voltage and current value and running environment,
By the judgement of secondary logical circuit and the logic control of MCU, realize in external signal or running environment exception, it is corresponding
Implement the guard method shut down in urgent telegram source.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the voltage value of output signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the current value of output signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the detection external signal voltage electricity
The method of flow valuve is to detect the current value of input signal.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply pair
The adaptability of external exception signals and working environment, which refers to, prevents external input signal to be reversely connected and power supply is caused to burn.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, the promotion emergency power supply pair
The adaptability of external exception signals and working environment is the method that external signal and internal electric signal are taken electrical isolation.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, it is described by external signal and inside electricity
The method that gas signal takes electrical isolation is to drive MCU logic control output signal in translation circuit after isolation amplification
Transformer.
Further, the method for preventing urban rail unsteady flow emergency power supply from burning, it is described by external signal and inside electricity
The method that gas signal takes electrical isolation is that the output signal of secondary logical and MCU logic control signal are taken Phototube Coupling.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, which is characterized in that primary transform
Circuit uses circuit of reversed excitation topological structure, and the primary transform circuit is divided using multi-stage cascade.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, the primary transform circuit are more
Grade cascade partial pressure is the primary side series connection partial pressure of the transformer in primary transform circuit, secondary side parallel output.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning further includes input signal filter
Wave circuit and the anti-circnit NOT of input.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning further includes secondary logical electricity
Amplification driving circuit and photoelectric isolating circuit is isolated in road.
Further, a kind of circuit for preventing urban rail current transformer emergency power supply from burning, the secondary logical circuit
Including thermal-shutdown circuit, output overvoltage protection circuit, output overcurrent protection circuit, battery logic judging circuit, inputted
Press detection circuit.
Further, input power will by filtering processing (as shown in Fig. 3), when DC input between have very big voltage
When jump, C1 will follow the variation of input voltage and generate a very big charging and discharging currents, especially have very with the capacity of C1
Big relationship.The capacitor of 82N is comparatively smaller, and electric current does not have so big；Shape of the RT3 NTC resistance in booting simultaneously
State can be generated heat when a flow of electric current is passed through it with limit inrush currents, this resistance value can reduce as the temperature rises, so as to
Effective protection thermistor will not damage, pcb board will not because of resistance temperature it is excessively high and burn yellow, burn black.Three fuses
It is used in series, can fuse when big electric current occurs in circuit.R1/R3 is insurance resistance, when DC/DC transformation loop is gone wrong,
Major loop can also be disconnected, but the high current of C1 would not flow through insurance resistance.
Further, parameter in practice still has some small differences, such as the inductance of transformer, switching tube
Junction capacity etc..Assuming that the load of some capacitor is laid particular stress on, then the voltage on this capacitor can also decline, load can subtract automatically
Gently, there is the function of an automatic adjustment.Output no-load, small carry use MCU down conversion process, improve the duty ratio of PWM, reduce device
Part property difference leads to voltage un-balance；For the synchronous driving of plural serial stage, the cabling of pcb board is also critically important, to accomplish as far as possible
Driving circuit cabling is consistent, reaches good equalizing effect.
By embodiment as can be seen that the invention further relates to a kind of controlling parties for preventing urban rail unsteady flow emergency power supply from burning
Method, by improving the ability to bear of emergency power supply input voltage range and jump frequency, and promotion emergency power supply to external different
The adaptability of regular signal and working environment, prevents emergency power supply to be burned out.
Further, the emergency power supply input voltage range and the ability to bear of jump frequency of improving is primary transform circuit
Using circuit of reversed excitation topological structure, the ability to bear of input voltage range and jump frequency is promoted.
Further, the method that the primary transform circuit uses multi-stage cascade partial pressure reduces the electricity that every primary circuit is born
Pressure；The method that the primary transform electricity uses multi-stage cascade partial pressure is that the main transformer in primary transform circuit is connected using primary side, secondary
Side is in parallel；The main transformer uses synchronously driven method.
Further, the emergency power supply input voltage range and the ability to bear of jump frequency of improving is to input signal
It is filtered.
Further, the promotion emergency power supply, which refers to the adaptability of external exception signals and working environment, passes through inspection
The temperature for surveying external signal voltage and current value and running environment, passes through the judgement of secondary logical circuit and the logic control of MCU
System is realized in external signal or running environment exception, implements the guard method shut down to emergency power supply.
Further, the method for the detection external signal voltage and current value is to detect the voltage value of output signal；It is described
The method of detection external signal voltage and current value is to detect the current value or the detection external signal voltage and current of output signal
The method of value is to detect the current value of input signal.
Further, the promotion emergency power supply refers to the adaptability of external exception signals and working environment anti-
Only external input signal is reversely connected and power supply is caused to burn.
Further, the promotion emergency power supply be to the adaptability of external exception signals and working environment will be outer
The method that portion's signal and internal electric signal take electrical isolation；It is described by external signal and internal electric signal take electrically every
From method be by MCU logic control output signal by isolation amplification after drive translation circuit in transformer, secondary is patrolled
The output signal and MCU logic control signal collected take Phototube Coupling.
It will be apparent that without departing from the principles of the present invention, several improvement or modification made are regarded as this
The protection scope of invention.
The invention has the advantages that
The present invention is radiated by being dispersed transformer, is had the advantages that so following some:
1, using multiple independent transformers come transimission power, the highest voltage of transformation of a transformer control in 440V hereinafter,
This is a very common Switching Power Supply input voltage to 440V, can greatly reduce the fever of transformer in this way；
2, the insulation of transformer is easy to damage under the high frequency again working environment of high pressure, if come using a transformer
Convert the voltage of 2200V, it is that the insulation of the inside is very difficult to handle and the problem of it is easy to appear insulation damages.In same body
Under product, more energy can be transmitted with the scheme of multiple transformers and obtain higher transfer efficiency；
It 3, the use of the fever of the scheme transformer of multiple transformers is dispersion, and using the fever of a transformer scheme is collection
In.May be without so obvious in the case where can be with encapsulating, it, can be transformation because glue is a relatively good heat carrier
Surrounding is led in the fever of device, but can clearly under conditions of not allowing encapsulating, and the fever of concentration will lead to one very high
Temperature rise；
4, the Mosfet of 800V is selected to fully consider that the output end in the case of maximum input voltage is short in transformer control circuit
Otherwise voltage stress when road can select the switching tube of lower pressure resistance, the conduction loss of switching tube is smaller, and just 0.45 ohm
Resistance, the conducting resistance of W12NK90Z are 0.88 ohm, in addition because the rising internal resistance of temperature also will continue to increase, it is actual
Conduction loss is about the one third or so of 900V Mosfet；
5, select metalized film capacitor much smaller relative to the volume of electrolytic capacitor to do equalizing capacitance in transformer control circuit, it is resistance to
The specification of pressure also has many selections, if the pressure-resistant specification unlike electrolytic capacitor is just very narrow greater than the selection face of 450V, gold
The pressure resistance of membrane capacitance has very more specifications can choose from 63V-2000V；
6, according to 90% efficiency, continuous power output 440W calculates, and has the heat of 44W to be lost inside power supply；Using 5
A independent transformer dispersion heat dissipation, each transformer transmit 88W, and temperature rise can be very low.
Claims (10)
1. a kind of control method for preventing urban rail unsteady flow emergency power supply from burning, it is characterized in that: by improving emergency power supply input electricity
The ability to bear of range and jump frequency is pressed, and promotes emergency power supply to the adaptation energy of external exception signals and working environment
Power prevents emergency power supply to be burned out.
2. the method for preventing urban rail unsteady flow emergency power supply from burning as described in claim 1, the raising emergency power supply input electricity
The ability to bear of pressure range and jump frequency is primary transform circuit using circuit of reversed excitation topological structure, promoted input voltage range with
And the ability to bear of jump frequency.
3. the method for preventing urban rail unsteady flow emergency power supply from burning as claimed in claim 2, the primary transform circuit is using multistage
The method for cascading partial pressure reduces the voltage that every primary circuit is born；The primary transform electricity using multi-stage cascade partial pressure method be
Main transformer in primary transform circuit is connected using primary side, and secondary side is in parallel；The main transformer uses synchronously driven method.
4. the method for preventing urban rail unsteady flow emergency power supply from burning as described in claim 1, the raising emergency power supply input electricity
The ability to bear for pressing range and jump frequency is that input signal is filtered.
5. the method for preventing urban rail unsteady flow emergency power supply from burning as described in claim 1, the promotion emergency power supply is to outside
The adaptability of abnormal signal and working environment refers to the temperature by detection external signal voltage and current value and running environment,
By the judgement of secondary logical circuit and the logic control of MCU, realize in external signal or running environment exception, it is corresponding
Implement the guard method shut down in urgent telegram source.
6. the method for preventing urban rail unsteady flow emergency power supply from burning as claimed in claim 5, the detection external signal voltage electricity
The method of flow valuve is to detect the voltage value of output signal；The method of the detection external signal voltage and current value is detection output letter
Number current value or it is described detection external signal voltage and current value method be detect input signal current value.
7. the method for preventing urban rail unsteady flow emergency power supply from burning as claimed in claim 5, the promotion emergency power supply pair
The adaptability of external exception signals and working environment, which refers to, prevents external input signal to be reversely connected and power supply is caused to burn.
8. the method for preventing urban rail unsteady flow emergency power supply from burning as claimed in claim 7, the promotion emergency power supply pair
The adaptability of external exception signals and working environment is the method that external signal and internal electric signal are taken electrical isolation；
Described by external signal and the method that internal electric signal takes electrical isolation is by MCU logic control output signal by being isolated
The transformer in translation circuit is driven after amplification, by the output signal of secondary logical and MCU logic control signal take photoelectricity every
From.
9. a kind of control circuit for preventing urban rail current transformer emergency power supply from burning, which is characterized in that primary transform circuit uses flyback
Circuit topological structure, the primary transform circuit are divided using multi-stage cascade；The primary transform circuit stages cascade partial pressure is main transformer
Change the primary side series connection partial pressure of the transformer in circuit, secondary side parallel output.
10. a kind of control circuit for preventing urban rail current transformer emergency power supply from burning as claimed in claim 9 further includes input letter
Number filter circuit and the anti-circnit NOT of input；Further include secondary logical circuit, amplification driving circuit and Phototube Coupling electricity is isolated
Road；The secondary logical circuit includes thermal-shutdown circuit, output overvoltage protection circuit, output overcurrent protection circuit, battery
Logic judging circuit, input over-voltage detection circuit.
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| CN2834005Y (en) * | 2005-09-09 | 2006-11-01 | 瑞谷科技(深圳)有限公司 | Multi-way output power supply for communication system |
| CN102611291A (en) * | 2012-03-27 | 2012-07-25 | 深圳航天科技创新研究院 | Input flyback series output-parallel circuit of single control unit |
| CN107528486A (en) * | 2016-06-16 | 2017-12-29 | 恩智浦有限公司 | Isolated power converters with output voltage protection |
| CN108539981A (en) * | 2018-06-04 | 2018-09-14 | 南京矽力杰半导体技术有限公司 | DC-to-DC converter |
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Application publication date: 20190625 |