CN110007221A - It is combined switching circuit and its fault detection method - Google Patents
It is combined switching circuit and its fault detection method Download PDFInfo
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- CN110007221A CN110007221A CN201910251962.7A CN201910251962A CN110007221A CN 110007221 A CN110007221 A CN 110007221A CN 201910251962 A CN201910251962 A CN 201910251962A CN 110007221 A CN110007221 A CN 110007221A
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- 238000001514 detection method Methods 0.000 title claims abstract description 79
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/002—Switching arrangements with several input- or output terminals
- H03K17/005—Switching arrangements with several input- or output terminals with several inputs only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/693—Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of combining switching circuits, including at least the first way switch and the second way switch, the first end of first way switch receives the first input voltage, the first end of second way switch receives the second input voltage, and the first way switch second end is connected with the second end of the second way switch and the output end as the combining switching circuit；The combining switching circuit further includes fault detection module, and the fault detection module is separately connected the first end, control terminal and the output end for being combined switching circuit of first way switch and the second way switch；The fault detection module carries out fault detection judgement according to the voltage status of the output end of the first end of first way switch and the second way switch, control terminal and the combining switching circuit.
Description
Technical field
The present invention relates to power electronics fields, and in particular to a kind of combining switching circuit and its fault detection method.
Background technique
Input power to load or electrical equipment be powered when, need to be arranged conducting connecting part realize input power with
The connection of load.It is especially switched in hot plug in application, needing to be arranged combining, to realize uninterrupted power supply, and realizes power supply
Control.The combining switch is alternatively referred to as variable connector, and there are multichannel diodes to realize, but the conducting power consumption of diode
It is larger.
In the prior art, combining switch there will still likely be the failures such as open circuit, short circuit, partial short circuit, in order to ensure not
It interruptedly supplying power and avoids carrying out the power-off risk in hot plug process, need real-time or periodically combining switch is carried out former
Barrier detection, if it is detected that failure, is alarmed and replaced in time.
In the prior art, the combining switch can use variable connector pipe, for example, MOSFET, under normal circumstances, due to
The output end of multichannel connects at load.The prior art only carries out the fault detection of single channel in fault detection, and is combined switch
Fault detection influenced by output end, so as to cause fault detection inaccuracy, or even wrong report failure the case where.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of combining switching circuit that can accurately detect failure and its failures
Detection method, to solve the technical problem of fault detection inaccuracy of the existing technology.
The technical solution of the invention is as follows, provides a kind of combining switching circuit with flowering structure, including at least first via
Switch and the second way switch, first end the first input voltage of reception of first way switch, the first of second way switch
End receives the second input voltage, and the first way switch second end connects with the second end of the second way switch and as the combining
The output end of switching circuit；
The combining switching circuit further includes fault detection module, and the fault detection module is separately connected the first via
The output end of the first end of switch and the second way switch, control terminal and the combining switching circuit；The fault detection module
According to the electricity of the output end of the first end of first way switch and the second way switch, control terminal and the combining switching circuit
Pressure condition carries out fault detection judgement.
Optionally, the fault detection module compares the voltage and combining switching circuitry output of the first way switch first end
Voltage, when first way switch is in the conductive state, if the voltage of the first way switch first end and the combining switch
The difference of the voltage of circuit output end is greater than first threshold, then judges that open circuit occurs for first way switch or conduction impedance is different
Often；The fault detection module compares the voltage of the second way switch first end and the voltage of combining switching circuitry output, in institute
State the second way switch it is in the conductive state when, if the voltage of the second way switch first end and the combining switching circuitry output
The difference of voltage is greater than first threshold, then judges that open circuit occurs for second way switch or conduction impedance is abnormal.
Optionally, the fault detection module compares the voltage and combining switching circuitry output of the first way switch first end
Voltage, when first way switch is in an off state, if the voltage of the first way switch first end levels off to the combining
The voltage of switching circuitry output then judges that short circuit occurs for first way switch；The fault detection module compares the second tunnel
The voltage of first end and the voltage of combining switching circuitry output are switched, when second way switch is in an off state, if
The voltage of second way switch first end level off to it is described combining switching circuitry output voltage, then judge second way switch
Short circuit occurs.
Optionally, the fault detection module compares the voltage and combining switching circuitry output of the first way switch first end
Voltage, when first way switch and the second way switch are in off state, if the voltage of the first way switch first end
It levels off to the voltage of the combining switching circuitry output, then judges that short circuit occurs for first way switch；The fault detection
Module compares the voltage of the second way switch first end and the voltage of combining switching circuitry output, in second way switch and the
When two-way switch is in off state, if the voltage of the second way switch first end levels off to the combining switching circuitry output
Voltage, then judge that short circuit occurs for second way switch.
Optionally, the combining switching circuit further includes third way switch to N way switch, the third way switch to
The first end of the corresponding way switch of N way switch receives corresponding input voltage, the third way switch to the second of N way switch
End is connected to the output end of the combining switching circuit；
The fault detection module be separately connected the third way switch to the first end of N way switch, control terminal and
The output end of the combining switching circuit；The fault detection module is according to the third way switch to the first of N way switch
The voltage status of the output end at end, control terminal and the combining switching circuit carries out fault detection judgement.
Optionally, the fault detection module compares the first way switch to the voltage of N way switch first end and combining and opens
The voltage for closing circuit output end, when M way switch is in the conductive state wherein (1≤M≤N), if M way switch first end
The difference of the voltage of voltage and the combining switching circuitry output is greater than first threshold, then judges that the M way switch occurs
Open circuit or conduction impedance are abnormal.
Optionally, the fault detection module compares the voltage and combining switching circuitry output of M way switch first end
Voltage (1≤M≤N), when the M way switch is in an off state, if the voltage of M way switch first end levels off to institute
The voltage for stating combining switching circuitry output then judges that short circuit occurs for the M way switch.
Optionally, the fault detection module compares the voltage and combining switching circuitry output of M way switch first end
Voltage (1≤M≤N), when first way switch is in off state to N way switch, if M way switch first end
Voltage level off to the voltage of the combining switching circuitry output, then judge that short circuit occurs for the M way switch.
Optionally, when wherein open circuit or short circuit occur all the way for fault detection module judgement or conduction impedance is abnormal,
In other roads at least all the way in the case where normally power supply, it is abnormal all the way to generation open circuit or short circuit or conduction impedance
Carry out hot plug replacement.
Optionally, first way switch and the second way switch are NPN type MOSFET.
Another technical solution of the invention is to provide a kind of fault detection method for being combined switching circuit, the conjunction
Path switching circuit includes the first way switch to N way switch, and the of the corresponding way switch of first way switch to N way switch
One end receives corresponding input voltage, and the second end of first way switch to the N way switch is connected to the combining switch electricity
The output end on road；
Fault detection is carried out using fault detection module, fault detection module is separately connected first way switch to N
First end, control terminal and the output end for being combined switching circuit of way switch；The fault detection module is according to described
The voltage status of one way switch to the first end of N way switch, control terminal and the output end for being combined switching circuit carries out
Fault detection judgement.
Using the present invention, compared with prior art, has the advantage that using the present invention, flow through the output electric current of load
It is in inverse variation trend with input voltage, to realize LED linear high efficiency drive, when the current reference signal is lower than minimum reference
When threshold value, i.e., when output electric current is lower than respective threshold, the current reference signal is clamped to definite value reference signal, passes through
The output electric current of load, which is in, meets the silicon-controlled definite value for maintaining current condition, which can be according to the definite value reference signal
It is configured.The present invention is capable of the application of compatible silicon controlled light modulation, meets the silicon-controlled requirement for maintaining electric current, improves circuit
Reliability.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of present invention combining switching circuit embodiment one；
Fig. 2 is the circuit structure diagram of present invention combining switching circuit embodiment two.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
Refering to what is shown in Fig. 1, illustrating the circuit structure of embodiment one.Embodiment one uses double switch, specific structure packet
The first end S1 for including the first way switch M1 and the second way switch M2, the first way switch M1 receives the first input voltage vin 1,
The first end S2 of the second way switch M2 receives the second input voltage vin 2, the first way switch M1 second end D1 and second
The second end D2 connection of way switch M2 and as it is described combining switching circuit output end vo；
The combining switching circuit further includes fault detection module, and the fault detection module is separately connected the first via
The output end vo of the first end of switch M1 and the second way switch M2, control terminal and the combining switching circuit；The failure inspection
Module is surveyed according to the first end of the first way switch M1 and the second way switch M2, control terminal and the combining switching circuit
The voltage status of output end vo carries out fault detection judgement.The failure includes the feelings such as open circuit, conduction impedance exception and short circuit
Condition, wherein conduction impedance includes situations such as conduction impedance is extremely bigger than normal extremely.
The fault detection module compares the voltage and combining switching circuitry output Vo of the first way switch M1 first end S1
Voltage, when the first way switch M1 is in the conductive state, if the voltage of the first way switch M1 first end S1 and the conjunction
The difference of the voltage of path switching circuit output end vo is greater than first threshold, then judges that the first way switch M1 occurs open circuit or leads
Logical impedance is abnormal；The fault detection module compares the voltage and combining switching circuitry output of the second way switch M2 first end S2
The voltage of Vo, when the second way switch M2 is in the conductive state, if the voltage of the second way switch M2 first end S2 with it is described
The difference for being combined the voltage of switching circuitry output Vo is greater than first threshold, then judge the second way switch M2 occur open circuit or
Conduction impedance is abnormal.The first threshold is typically small, for example, 0.3V, generally sets the conduction impedance of body diode
0.7V or less.
The fault detection module compares the voltage and combining switching circuitry output Vo of the first way switch M1 first end S1
Voltage, when the first way switch M1 is in an off state, if the voltage of the first way switch M1 first end S1 levels off to institute
The voltage for stating combining switching circuitry output Vo then judges that short circuit occurs for the first way switch M1；The fault detection module
Compare the voltage of the second way switch M2 first end S2 and the voltage of combining switching circuitry output Vo, in the second way switch M2
When in an off state, if the voltage of the second way switch M2 first end level off to it is described combining switching circuitry output Vo electricity
Pressure then judges that short circuit occurs for the second way switch M2.In order to further increase fault detection accuracy and power supply it is steady
It is qualitative, there may be failing to report failure, but failure cannot be reported by mistake, since the voltage of combining switching circuitry output is by every way switch
Influence, so short circuit judge when, another way switch also should be under off state, specifically: the fault detection module
Compare the voltage of the first way switch first end and the voltage of combining switching circuitry output, on first way switch and the second tunnel
Switch is when being in off state, if the voltage of the first way switch first end levels off to the electricity of the combining switching circuitry output
Pressure then judges that short circuit occurs for first way switch；The fault detection module compare the second way switch first end voltage and
It is combined the voltage of switching circuitry output, when second way switch and the second way switch are in off state, if second
The voltage of way switch first end levels off to the voltage of the combining switching circuitry output, then judges that second way switch occurs
Short circuit.
The foregoing describe there is the case where double switch in the present embodiment, wherein being opened about the first way switch M1 and the second tunnel
It closes M2 and uses NMOSFET, the first end S1 of the first way switch M1 is its source electrode, and the second end D1 of the first way switch M1 leaks for it
Pole, the control terminal G1 of the first way switch M1 are its grid, and the first end S2 of the second way switch M2 is its source electrode, the first way switch M2
Second end D2 drain for it, the control terminal G2 of the first way switch M2 is its grid.Load Rload is connected in output end vo, with
It realizes to load supplying, in combining switching circuit, can be replaced on hot plug is wherein carried out all the way without influencing to power.
It may include sample circuit and comparison circuit in the fault detection module, the sample circuit is to be checked for sampling
The circuit of survey, and realization is compared by the comparison circuit, the comparison circuit can use a variety of implementations, example
Such as, compared by comparator, selected and controlled by selection circuit, by capacitor charge and discharge form, etc..
Refering to what is shown in Fig. 2, illustrating the circuit structure of embodiment two.Embodiment two uses N way switch, i.e., in embodiment one
On the basis of, increase third way switch M3 to N way switch MN, the third way switch M3 to the corresponding road of N way switch MN
The first end of switch receives corresponding input voltage, and the second end of third way switch to the N way switch is connected to the conjunction
The output end of path switching circuit；Therefore, the present embodiment two is that the combining with the first way switch M1 to N way switch MN switchs electricity
Road.
The fault detection module is separately connected first end, control terminal of the third way switch M3 to N way switch MN
And the output end of the combining switching circuit；The fault detection module is according to the third way switch M3 to N way switch
The voltage status of the output end vo of the first end of MN, control terminal and the combining switching circuit carries out fault detection judgement.
The fault detection module compares the voltage and combining switch electricity of the first way switch M1 to N way switch first end SN
The voltage of road output end vo, when M way switch is in the conductive state wherein (1≤M≤N), if the electricity of M way switch first end
Pressure is greater than the voltage of the combining switching circuitry output, then judges that open circuit occurs for the M way switch or conduction impedance is abnormal.
The fault detection module compares the voltage of M way switch first end and the voltage (1 of combining switching circuitry output
≤ M≤N), when the M way switch is in an off state, if the voltage of M way switch first end level off to it is described combining open
The voltage for closing circuit output end then judges that short circuit occurs for the M way switch.Similarly, in order to further increase fault detection
Accuracy and power supply stability, there may be failing to report failure, but failure cannot be reported by mistake, due to combining switching circuit output
The voltage at end is influenced by every way switch, so other way switch also should be under off state, specifically when short circuit judges
Ground: the fault detection module compare M way switch first end voltage and combining switching circuitry output voltage (1≤M≤
N), when first way switch is in off state to N way switch, if the voltage of M way switch first end levels off to
The voltage of the combining switching circuitry output, then judge that short circuit occurs for the M way switch.
When open circuit or short circuit or conduction impedance exception wherein occur all the way for fault detection module judgement, in other roads
At least all the way in the case where normally power supply, it is slotting to the carry out heat all the way of generation open circuit or short circuit or conduction impedance exception
Pull out replacement.
The third way switch and N way switch are N-type MOSFET.
About the selection of switchtype, example only is listed in embodiment one and two, can also be used other kinds of
Switch or transistor.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (11)
1. a kind of combining switching circuit, including at least the first way switch and the second way switch, the first end of first way switch
The first input voltage is received, the first end of second way switch receives the second input voltage, the first way switch second end
It is connected with the second end of the second way switch and as the output end for being combined switching circuit, it is characterised in that:
The combining switching circuit further includes fault detection module, and the fault detection module is separately connected first way switch
With the first end, control terminal and the output end for being combined switching circuit of the second way switch；The fault detection module according to
The voltage shape of the output end of the first end of first way switch and the second way switch, control terminal and the combining switching circuit
State carries out fault detection judgement.
2. combining switching circuit according to claim 1, it is characterised in that: the fault detection module compares the first via and opens
The voltage of first end and the voltage of combining switching circuitry output are closed, when first way switch is in the conductive state, if the
The difference of the voltage of the voltage of one way switch first end and the combining switching circuitry output is greater than first threshold, then judges institute
It states the first way switch and open circuit or conduction impedance exception occurs；The fault detection module compares the voltage of the second way switch first end
With combining switching circuitry output voltage, when second way switch is in the conductive state, if the second way switch first end
Voltage and the difference of voltage of the combining switching circuitry output be greater than first threshold, then judge second way switch hair
Raw open circuit or conduction impedance are abnormal.
3. combining switching circuit according to claim 1 or 2, it is characterised in that: the fault detection module compares first
The voltage of way switch first end and the voltage of combining switching circuitry output, when first way switch is in an off state,
If the voltage of the first way switch first end level off to it is described combining switching circuitry output voltage, judge that the first via is opened
It closes and short circuit occurs；The fault detection module compares the voltage of the second way switch first end and the electricity of combining switching circuitry output
Pressure, when second way switch is in an off state, if the voltage of the second way switch first end levels off to the combining and switchs
The voltage of circuit output end then judges that short circuit occurs for second way switch.
4. combining switching circuit according to claim 1 or 2, it is characterised in that: the fault detection module compares first
The voltage of way switch first end and the voltage of combining switching circuitry output, locate in first way switch and the second way switch
When off state, if the voltage of the first way switch first end level off to it is described combining switching circuitry output voltage, sentence
Short circuit occurs for first way switch that breaks；The fault detection module compares the voltage and combining switch of the second way switch first end
The voltage of circuit output end, when second way switch and the second way switch are in off state, if the second way switch
The voltage of one end levels off to the voltage of the combining switching circuitry output, then judges that short circuit occurs for second way switch.
5. combining switching circuit according to claim 1, it is characterised in that: the combining switching circuit further includes third road
For switch to N way switch, the first end of corresponding way switch of the third way switch to N way switch receives corresponding input electricity
Pressure, the second end of third way switch to the N way switch are connected to the output end of the combining switching circuit；
The fault detection module is separately connected the third way switch to the first end of N way switch, control terminal and described
It is combined the output end of switching circuit；The fault detection module is according to the first end of the third way switch to N way switch, control
The voltage status of the output end of end processed and the combining switching circuit carries out fault detection judgement.
6. combining switching circuit according to claim 5, it is characterised in that: the fault detection module compares the first via and opens
The voltage of Guan Zhi N way switch first end and the voltage of combining switching circuitry output, M way switch is on shape wherein
When state (1≤M≤N), if the voltage of M way switch first end and the difference of the voltage of the combining switching circuitry output are greater than
First threshold then judges that open circuit occurs for the M way switch or conduction impedance is abnormal.
7. combining switching circuit according to claim 5, it is characterised in that: the fault detection module compares the road M and opens
The voltage of first end and the voltage (1≤M≤N) of combining switching circuitry output are closed, it is in an off state in the M way switch
When, if the voltage of M way switch first end level off to it is described combining switching circuitry output voltage, judge the road the M
Short circuit occurs for switch.
8. combining switching circuit according to claim 5, it is characterised in that: the fault detection module compares the road M and opens
The voltage of first end and the voltage (1≤M≤N) of combining switching circuitry output are closed, in first way switch to N way switch
When being in off state, if the voltage of M way switch first end level off to it is described combining switching circuitry output voltage,
Judge that short circuit occurs for the M way switch.
9. according to combining switching circuit described in claim 6,7 or 8 any one, it is characterised in that: when the fault detection
Module judges that open circuit or short circuit wherein occur all the way or conduction impedance is abnormal, at least normally power supply all the way in other roads
In the case where, to generation open circuit or short circuit or the carry out hot plug replacement all the way of conduction impedance exception.
10. being combined switching circuit according to claim 1 or 5, it is characterised in that: first way switch and the second tunnel
Switch is N-type MOSFET.
11. a kind of fault detection method for being combined switching circuit, the combining switching circuit includes that the first way switch to the road N is opened
It closes, the first end of corresponding way switch of first way switch to N way switch receives corresponding input voltage, the first via
It switchs to the second end of N way switch and is connected to the output end of the combining switching circuit；It is characterized by:
Fault detection is carried out using fault detection module, fault detection module is separately connected first way switch to the road N and opens
First end, control terminal and the output end for being combined switching circuit of pass；The fault detection module is according to the first via
It switchs to the voltage status of the output end of the first end of N way switch, control terminal and the combining switching circuit and carries out failure
Detection judgement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910251962.7A CN110007221A (en) | 2019-03-29 | 2019-03-29 | It is combined switching circuit and its fault detection method |
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| CN201910251962.7A CN110007221A (en) | 2019-03-29 | 2019-03-29 | It is combined switching circuit and its fault detection method |
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| CN113422596A (en) * | 2021-08-25 | 2021-09-21 | 绅克半导体科技(苏州)有限公司 | Multichannel signal conflux circuit, calibration circuit and test machine |
| CN114325287A (en) * | 2022-01-04 | 2022-04-12 | 深圳市永联科技股份有限公司 | Power MOS manages fault detection's circuit |
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| CN105388408A (en) * | 2015-11-05 | 2016-03-09 | 新誉轨道交通科技有限公司 | IGBT switch fault detection system and detection method |
| EP3244700A2 (en) * | 2016-05-10 | 2017-11-15 | Rohm Co., Ltd. | Ground fault detection circuit, abnormality detection circuit, light emitting device, vehicle |
| CN107732875A (en) * | 2016-08-12 | 2018-02-23 | 通用电气公司 | Solid circuit breaker and motor driven systems |
| CN210401585U (en) * | 2019-03-29 | 2020-04-24 | 杰华特微电子（杭州）有限公司 | Combiner switch circuit |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |