CN112821743B - Power supply key hardware reconstruction unit structure based on intelligent diagnosis - Google Patents
Power supply key hardware reconstruction unit structure based on intelligent diagnosis Download PDFInfo
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- CN112821743B CN112821743B CN202110222734.4A CN202110222734A CN112821743B CN 112821743 B CN112821743 B CN 112821743B CN 202110222734 A CN202110222734 A CN 202110222734A CN 112821743 B CN112821743 B CN 112821743B
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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
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Abstract
The invention provides a power supply key hardware reconstruction unit structure based on intelligent diagnosis, which predicts or judges the power supply fault form on line in real time by acquiring the working state and characteristic parameters of a power supply and based on the power supply intelligent health diagnosis technology, carries out hardware on-line reconstruction aiming at the fault part according to the power supply fault form, carries out on-line reconstruction on key hardware with fault information by distributing a plurality of key hardware branches on a key hardware unit, realizes fault isolation and ensures the power supply to continue to work reliably, greatly ensures the normal input and output of the power supply in a power circuit of a switching power supply, and is suitable for application environments which need high reliability and long service life and can not change devices after faults.
Description
Technical Field
The invention relates to a power electronic technology, in particular to a power supply key hardware reconstruction unit structure based on intelligent diagnosis.
Background
The key of the hardware online reconfiguration lies in the flexibility of the system structure, and the key of the system structure flexibility lies in the modular design, flexible configuration and design of a flexible control network of key devices in the power supply. The online reconstruction of the power supply hardware is still in a theoretical research stage, and no engineering application technology is used. The method for improving the reliability commonly used at present mainly has single machine multi-redundancy, and the method is characterized in that a plurality of same single machines work simultaneously or one single machine works, other single machines are used as backups, once a fault occurs, the fault single machine is isolated, and the backup single machine is started to continue working. This method is effective in improving the reliability of the system, but this method has problems of a large increase in cost and a large multiplication of volume and weight, and it is difficult to achieve the requirements of miniaturization and weight reduction.
Disclosure of Invention
Aiming at the problem that in the prior art, multiple redundancies of a single machine are difficult to realize miniaturization and light weight, the invention provides a power supply key hardware reconstruction unit structure based on intelligent diagnosis, which has the advantages of simple structural design, clear principle, realizable engineering, few types and quantity of applied components and low cost.
The invention is realized by the following technical scheme:
a power supply key hardware reconstruction unit structure based ON intelligent diagnosis is characterized in that one end of a key hardware unit is connected to a positive voltage input end Vin +, the other end of the key hardware unit is connected to a negative voltage input end Vin-, the key hardware unit comprises a plurality of key hardware branches, wherein each key hardware branch is provided with a plurality of key hardware, and a driving signal of each key hardware comprises Pulse Width Modulation (PWM), a circuit short-circuit signal ON and a circuit open-circuit signal OFF;
when a single key hardware in one key hardware branch fails and cannot work normally; the isolation of fault key hardware is realized through online reconstruction, the drive of the key hardware is changed for another key hardware branch, and the normal work of the circuit is realized.
Preferably, the critical hardware unit includes a first critical hardware branch and a second critical hardware branch, and the first critical hardware branch and the second critical hardware branch are arranged in parallel.
Further, the first key hardware branch comprises a key hardware Q1 upper part and a key hardware Q1 lower part, wherein the key hardware Q1 upper part and the key hardware Q1 lower part are sequentially arranged in series;
when the driving signal on the key hardware Q1 is PWM and the driving signal under the key hardware Q1 is OFF, the first key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q1 is PWM and the driving signal under the critical hardware Q1 is ON, the first critical hardware branch operates normally.
Further, the second key hardware branch comprises a key hardware Q2 upper part and a key hardware Q2 lower part, wherein the key hardware Q2 upper part and the key hardware Q2 lower part are sequentially arranged in series;
when the driving signal on the key hardware Q2 is PWM and the driving signal under the key hardware Q2 is OFF, the second key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q2 is PWM and the driving signal under the critical hardware Q2 is ON, the second critical hardware branch operates normally.
Preferably, after a critical hardware branch in the critical hardware unit has a fault signal, the other critical hardware branch performs normal operation by allocating and replacing the critical hardware branch having the fault signal through the reconfiguration circuit.
Preferably, the online reconfiguration adjustment method is to perform online deployment of a drive signal of another key hardware in one key hardware branch to a circuit breaking signal OFF to achieve isolation of the fault key hardware, and meanwhile, the online reconfiguration is to deploy the drive signal of the key hardware in the other key hardware branch to a circuit short-circuit signal ON to ensure that the power supply continues to work normally.
A power circuit structure of a switching power supply comprises a voltage input end, a transformer T1 and a voltage output end which are sequentially connected, and a power supply key hardware unit structure connected to the voltage input end, wherein the power supply key hardware unit structure adopts the power supply key hardware unit structure based on intelligent diagnosis.
Preferably, the voltage input end comprises a positive voltage input end Vin + and a negative voltage input end Vin-; a first capacitor C1 is connected between the positive voltage input end Vin + and the negative voltage input end Vin-; the first end of the power supply key hardware unit structure is connected to a negative voltage input end Vin-, and the other end of the power supply key hardware unit structure is connected to a positive voltage input end Vin + through a transformer T1;
the voltage output end comprises a positive voltage output end Vo + and a negative voltage output end Vo-; the negative voltage output end Vo-is connected with a second capacitor C2, a diode D1 and an inductor L1 through the space between the transformer T1 and the positive voltage output end Vo +.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a power supply key hardware reconstruction unit structure based on intelligent diagnosis, which predicts or judges the power supply fault form on line in real time by acquiring the working state and characteristic parameters of a power supply and based on the power supply intelligent health diagnosis technology, carries out hardware on-line reconstruction aiming at the fault part according to the power supply fault form, carries out on-line reconstruction on key hardware with fault information by distributing a plurality of key hardware branches on a key hardware unit, realizes fault isolation and ensures the power supply to continue to work reliably, greatly ensures the normal input and output of the power supply in a power circuit of a switching power supply, and is suitable for application environments which need high reliability and long service life and can not change devices after faults.
Drawings
FIG. 1 is a schematic structural diagram of a power circuit structure of a switching power supply according to the present invention;
fig. 2 is a schematic diagram of a power supply key hardware unit structure according to the present invention.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention provides a power supply key hardware reconstruction unit structure based ON intelligent diagnosis, as shown in figure 2, one end of a key hardware unit is connected to a positive voltage input end Vin +, the other end is connected to a negative voltage input end Vin-, the key hardware unit comprises a plurality of key hardware branches, wherein each key hardware branch is provided with a plurality of key hardware, and a driving signal of each key hardware comprises Pulse Width Modulation (PWM), a circuit short-circuit signal ON and a circuit open-circuit signal OFF;
when a single key hardware in one key hardware branch fails and cannot work normally; the isolation of fault key hardware is realized through online reconstruction, the drive of the key hardware is changed for another key hardware branch, and the normal work of the circuit is realized.
The key hardware unit comprises a first key hardware branch and a second key hardware branch, and the first key hardware branch and the second key hardware branch are arranged in parallel.
The first key hardware branch comprises a key hardware Q1 upper part and a key hardware Q1 lower part, wherein the key hardware Q1 upper part and the key hardware Q1 lower part are sequentially arranged in series;
when the driving signal on the key hardware Q1 is PWM and the driving signal under the key hardware Q1 is OFF, the first key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q1 is PWM and the driving signal under the critical hardware Q1 is ON, the first critical hardware branch operates normally.
The second key hardware branch comprises a key hardware Q2 upper part and a key hardware Q2 lower part, wherein the key hardware Q2 upper part and the key hardware Q2 lower part are sequentially arranged in series;
when the driving signal on the key hardware Q2 is PWM and the driving signal under the key hardware Q2 is OFF, the second key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q2 is PWM and the driving signal under the critical hardware Q2 is ON, the second critical hardware branch operates normally.
After a key hardware branch in the key hardware unit generates a fault signal, the other key hardware branch normally works by allocating and replacing the key hardware branch generating the fault signal through the reconstruction circuit.
The adjusting method of the online reconfiguration in the invention is that a single key hardware in one key hardware branch is in fault, the drive signal of another key hardware in the key hardware branch is allocated to be a circuit breaking signal OFF in an online manner, so that the isolation of the fault key hardware is realized, and meanwhile, the drive signal of the key hardware in the other key hardware branch is allocated to be a circuit short-circuit signal ON in the online reconfiguration, so that the normal work of a power supply is ensured.
According to fig. 1, the switching power supply power circuit structure includes a voltage input terminal, a transformer T1, a voltage output terminal, and a power supply key hardware unit structure connected to the voltage input terminal, where the power supply key hardware unit structure adopts the above power supply key hardware unit structure based on intelligent diagnosis.
The voltage input end comprises a positive voltage input end Vin + and a negative voltage input end Vin-; a first capacitor C1 is connected between the positive voltage input end Vin + and the negative voltage input end Vin-; the first end of the power supply key hardware unit structure is connected to a negative voltage input end Vin-, and the other end of the power supply key hardware unit structure is connected to a positive voltage input end Vin + through a transformer T1;
the voltage output end comprises a positive voltage output end Vo + and a negative voltage output end Vo-; the negative voltage output end Vo-is connected with a second capacitor C2, a diode D1 and an inductor L1 through the space between the transformer T1 and the positive voltage output end Vo +.
The invention provides a new technology for greatly improving the reliability of a power supply by means of online reconstruction of key hardware. In application environments such as space navigation, deep space exploration, high orbit satellites and nuclear power stations which need high reliability and long service life and cannot replace devices after faults, hardware online reconstruction can be performed on the devices at the fault parts, fault isolation is achieved, and continuous and reliable work of a power supply is guaranteed.
Examples
The Mosfet serving as a power switch tube in a power circuit of the switching power supply bears large comprehensive stress and high failure rate, and is a main factor influencing the reliability of the switching power supply. The power switch tube Mosfet is used as key hardware, a basic switch unit which takes the power switch tube Mosfet as a main device is extracted, a plurality of units are combined and connected in series, parallel or cascade mode, and based on a power health diagnosis technology and a programmable driving technology, the driving mode of the Mosfet tube combination is changed on line aiming at the fault of a single Mosfet switch tube, so that the on-line isolation of the fault tube is realized, and the power supply is ensured to work normally. The technology greatly reduces the failure probability of the combination of the MOSFETs to 1/9 of the failure probability of a single MOSFET, and greatly improves the reliability of the power supply. The principle for improving the operational reliability of the power switching tube hardware online reconstruction Mosfet is described in the following table 1.
TABLE 1 power switch tube hardware on-line reconstruction working reliability improvement principle table
The on-line reconstruction structure of key hardware is simple in design, clear in principle, capable of realizing engineering, few in types and quantity of applied components, low in cost and capable of being widely applied to military switching power supply products, especially in application environments which need high reliability and long-life work, such as space navigation, deep space exploration and high orbit satellites, and cannot be replaced after failure.
Claims (6)
1. A power supply key hardware reconstruction unit structure based ON intelligent diagnosis is characterized in that the power supply key hardware reconstruction unit based ON intelligent diagnosis comprises a key hardware unit, one end of the key hardware unit is connected to a positive voltage input end Vin +, the other end of the key hardware unit is connected to a negative voltage input end Vin-, the key hardware unit comprises a plurality of key hardware branches, each key hardware branch is provided with a plurality of key hardware, and a driving signal of each key hardware comprises Pulse Width Modulation (PWM), a circuit short-circuit signal ON and a circuit open-circuit signal OFF;
when a single key hardware in one key hardware branch fails and cannot work normally; the isolation of fault key hardware is realized through online reconstruction, and the drive of the key hardware is changed for another key hardware branch, so that the other key hardware branch can normally work by allocating and replacing the key hardware branch with a fault signal;
the method comprises the steps of predicting or judging the power failure form on line in real time by acquiring the working state and characteristic parameters of the power supply and based on the intelligent health diagnosis technology of the power supply, carrying out hardware online reconstruction on a failure part according to the form, and realizing fault isolation and ensuring the continuous and reliable work of the power supply by distributing a plurality of key hardware branches on a key hardware unit and carrying out online reconstruction on key hardware with fault information;
the online reconfiguration adjusting method is characterized in that a single key hardware in one key hardware branch is in fault, a drive signal of another key hardware in the key hardware branch is allocated to be a circuit breaking signal OFF ON line, so that the fault key hardware is isolated, and meanwhile, the drive signal of the key hardware in the other key hardware branch is allocated to be a circuit short-circuit signal ON through online reconfiguration, so that the power supply is ensured to work normally.
2. The power supply critical hardware reconfiguration unit structure based on intelligent diagnosis according to claim 1, wherein the critical hardware unit comprises a first critical hardware branch and a second critical hardware branch, and the first critical hardware branch and the second critical hardware branch are arranged in parallel.
3. The power supply critical hardware reconfiguration unit structure based on intelligent diagnosis of claim 2, wherein the first critical hardware branch comprises a critical hardware Q1 upper part and a critical hardware Q1 lower part, wherein the critical hardware Q1 upper part and the critical hardware Q1 lower part are sequentially connected in series;
when the driving signal on the key hardware Q1 is PWM and the driving signal under the key hardware Q1 is OFF, the first key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q1 is PWM and the driving signal under the critical hardware Q1 is ON, the first critical hardware branch operates normally.
4. The power supply critical hardware reconfiguration unit structure based on intelligent diagnosis of claim 2, wherein the second critical hardware branch comprises a critical hardware Q2 upper part and a critical hardware Q2 lower part, wherein the critical hardware Q2 upper part and the critical hardware Q2 lower part are sequentially connected in series;
when the driving signal on the key hardware Q2 is PWM and the driving signal under the key hardware Q2 is OFF, the second key hardware branch cannot work normally;
when the driving signal ON the critical hardware Q2 is PWM and the driving signal under the critical hardware Q2 is ON, the second critical hardware branch operates normally.
5. A switching power supply power circuit structure, which is characterized by comprising a voltage input end, a transformer T1 and a voltage output end which are connected in sequence, and a power supply key hardware unit structure connected to the voltage input end, wherein the power supply key hardware unit structure adopts the power supply key hardware reconstruction unit structure based on intelligent diagnosis according to any one of claims 1-4.
6. The power circuit structure of claim 5, wherein the voltage input terminal comprises a positive voltage input terminal Vin + and a negative voltage input terminal Vin-; a first capacitor C1 is connected between the positive voltage input end Vin + and the negative voltage input end Vin-; the first end of the power supply key hardware unit structure is connected to a negative voltage input end Vin-, and the other end of the power supply key hardware unit structure is connected to a positive voltage input end Vin + through a transformer T1;
the voltage output end comprises a positive voltage output end Vo + and a negative voltage output end Vo-; the second capacitor C2, the diode D1 and the inductor L1 are connected between the negative voltage output end Vo-and the positive voltage output end Vo + through the transformer T1.
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