CN106610443A - Alternating current input voltage sensing device - Google Patents
Alternating current input voltage sensing device Download PDFInfo
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- CN106610443A CN106610443A CN201510688322.4A CN201510688322A CN106610443A CN 106610443 A CN106610443 A CN 106610443A CN 201510688322 A CN201510688322 A CN 201510688322A CN 106610443 A CN106610443 A CN 106610443A
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- electrically connected
- power supply
- power switch
- voltage sensing
- voltage
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Abstract
The invention provides an alternating current voltage sensing device which is electrically connected with an alternating current power supply. The alternating current voltage sensing device comprises a first input end, a second input end, a judging unit, a first voltage sensing unit and a second voltage sensing unit. The first input end is electrically connected with the ground line of the alternating current power supply. The second input end is electrically connected with the fire line of the alternating current power supply. The judging unit comprises a first power switch, a second power switch and an output end. The first power switch and the second power switch are connected in series. The output end is coupled to the second power switch. The first voltage sensing unit is electrically connected with the first input end and the first power switch. The second voltage sensing unit is electrically connected with the second input end and the second power switch. The output end of the judging unit outputs a normal operation signal when the fire line and the ground line of the alternating current power supply carry out normal power supply.
Description
Technical field
The present invention relates to a kind of power supply sensing device further, particularly a kind of live wire for being related to sense alternating current power supply and
Ground wire voltage makes no abnormal alternating voltage sensing device further.
Background technology
In general, electronic product is required for appropriate electric power ability normal operation.Therefore, in order to avoid work as
When there is abnormal power supply in alternating current power supply, electronic product is operated or or even cause the problem damaged, can be with
Whether voltage sensing device is arranged between alternating current power supply and electronic product abnormal to sense alternating current power supply.
Traditional alternating voltage sensing device further is all the ground wire voltage and hot voltage in alternating current power supply while sending out
When raw abnormal, the problem that the alternating current power supply that can correctly judge is lost, and output abnormality alarm signal is reaching
To the effect of protection electronic product.However, when if only ground wire voltage or hot voltage occur abnormal, nothing
Method correctly judges the problem that the ground wire voltage of alternating current power supply or hot voltage power supply are lost, therefore cannot be only
Ground wire voltage or hot voltage reach the effect of protection electronic product when occurring abnormal.
The content of the invention
The technical problem to be solved is to provide a kind of alternating voltage sensing device further, to respective sense
Whether the live wire of alternating current power supply and the power supply of ground wire are abnormal.
To achieve these goals, the invention provides a kind of alternating voltage sensing device further, is electrically connected to exchange
Power supply, alternating voltage sensing device further includes first input end, the second input, judging unit, first voltage
Sensing unit and second voltage sensing unit.First input end is electrically connected to the ground wire of alternating current power supply, and second is defeated
Enter the live wire that end is electrically connected to alternating current power supply.Judging unit comprising the first power switch, the second power switch and
Outfan, the first power switch and the second power switch are concatenated, and outfan is coupled to the second power switch.The
One voltage sensing unit is electrically connected to first input end and the first power switch, and second voltage sensing unit is electrically connected
It is connected to the second input and the second power switch.Judging unit is all normally supplied in the live wire and ground wire of alternating current power supply
When electric, normal operation signal is exported by outfan.
The method have technical effect that：
The alternating voltage sensing device further of the present invention detects respectively the ground wire voltage and hot voltage of alternating current power supply, and
In ground wire voltage and hot voltage all normal power supplies, normal power supply signal is exported；In the ground wire electricity of alternating current power supply
There is abnormal power supply in pressure or hot voltage, or ground wire voltage and hot voltage all occur to export different during abnormal power supply
Normal power supply signal.Consequently, it is possible to can exactly judge whether alternating current power supply is powered abnormal, it is to avoid in ground wire
When voltage or hot voltage occur abnormal power supply, the situation of normal power supply signal is still exported.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as to the present invention's
Limit.
Description of the drawings
Fig. 1 is the circuit diagram of the AC-input voltage sensing device further of the present invention；
Fig. 2 is ground wire voltage, hot voltage and the outfan of the AC-input voltage sensing device further of the present invention
Oscillogram.
Wherein, reference
10 judging units
100 first power switch
102 second power switch
104th, 108 current-limiting resistor
106 photoelectrical couplers
1060 illuminating parts
1062 receive light part
110th, 112,130,132,134,136,150,152,154,156 resistor
12 first voltage sensing units
120 first switches
122 first constrictions
124 first resistor networks
126 first capacitors
128 first voltage stabilizing parts
14 second voltage sensing units
140 second switches
142 second constrictions
144 second resistance networks
146 second capacitors
148 second voltage stabilizing parts
The inputs of L second
N first input ends
OUT outfans
VDC DC voltages
Vs alternating voltages
VSL hot voltages
VSN ground wire voltages
Specific embodiment
The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：
The present invention input voltage sensing device further to sense alternating current power supply Vs live wire (Live wire) and ground
The input voltage of line (Neutral wire), and judge whether live wire and the input voltage of ground wire occur exception, and
Normal power supply signal can be input into when live wire and all normal ground wire voltage.
Fig. 1 is refer to, it is the circuit diagram of the AC-input voltage sensing device further of the present invention.Exchange input electricity
Pressure sensing device further is single comprising first input end N, the second input L, judging unit 10, first voltage sensing
Unit 12 and second voltage sensing unit 14.
First input end N is electrically connected to the ground wire of alternating current power supply Vs, and the second input L is electrically connected to exchange
The live wire of power supply Vs.
Judging unit 10 includes outfan OUT, and first power switch 100 and the second power of concatenation
Switch 102；As shown in figure 1, the first power switch 100 and the second power switch 102 are respectively with metal oxygen
Compound semiconductor transistor is realized.The source ground of the first power switch 100, it is electric that grid is electrically connected to first
Pressure sensing unit 12, drain electrode is electrically connected to the source electrode of the second power switch 102.Second power switch 102
Grid be electrically connected to second voltage sensing unit 14, drain electrode is electrically connected to light by current-limiting resistor 104
The illuminating part 1060 of electric coupler 106.Illuminating part 1060 can for example with light emitting diode realization, illuminating part
1060 negative electrode is electrically connected to current-limiting resistor 104, and anode is electrically connected to DC source VDC.Light thermocouple
The sensitive piece 1060 of clutch 106 can for example with photoelectric crystal realization, and the collector of sensitive piece 1060 is electrically connected to
DC source VDC, emitter-base bandgap grading is also connect in addition to being electrically connected to outfan OUT by current-limiting resistor 108
Ground.
Judging unit 10 also includes resistor 110,112, and resistor 110 is connected across the first power switch 100
Grid and source electrode between, resistor 112 is connected across between the grid of the second power switch 102 and source electrode.
First voltage sensing unit 12 is located between first input end N and the first power switch 100, and with
First input end N and the first power switch 100 are electrically connected.First voltage sensing unit 12 is included
First switch 120, the first constriction 122, first resistor network 124, the first capacitor 126 and first
Voltage stabilizing part 128.One end of first switch 120 is electrically connected to first input end N, and the other end is electrically connected to
One constriction 122.One end of first voltage stabilizing part 128 is connected to the grid of the first power switch 100, another
End ground connection.First capacitor 126 is electrically connected to the first voltage stabilizing part 128.First resistor network 124 is located at the
Between one constriction 122 and the first voltage stabilizing part 128, and comprising the multiple resistors 130～136 being connected in series,
A resistor 136 therein in first resistor network 124 is electrically connected in parallel to the first voltage stabilizing part 128.Such as
Shown in Fig. 1, the first voltage stabilizing part 128 can be realized for example with voltage stabilizing (Zener) diode, and the first voltage stabilizing part
Conducting voltage of 128 breakdown voltages at least equal to first power switch 100.
Second voltage sensing unit 14 is located between the second input L and the second power switch 102, and with
Second input N and the second power switch 102 are electrically connected.Second voltage sensing unit 14 is included
Second switch 140, the second constriction 142, first resistor network 144, the second capacitor 146 and second
Voltage stabilizing part 148.One end of second switch 140 is electrically connected to the second input L, and the other end is electrically connected to
Two constrictions 142.One end of second voltage stabilizing part 148 is connected to the grid of the second power switch 102, another
End ground connection.Second capacitor 146 is electrically connected in parallel to the second voltage stabilizing part 148.Second resistance network 144 sets
Between the second constriction 142 and the second voltage stabilizing part 148, and comprising the multiple resistors being connected in series
150～156, the resistor 156 therein in second resistance network 144 is electrically connected in parallel to the second voltage stabilizing
Part 148.As shown in figure 1, the second voltage stabilizing part 148 can be realized for example with Zener diode, and the second voltage stabilizing
Conducting voltage of the breakdown voltage of part 148 at least equal to second power switch 102.
When actually implementing, when the ground wire voltage VSN and hot voltage VSL of alternating current power supply Vs it is all normal
During power supply, the closure of first switch 120 can make the ground wire voltage VSN of alternating current power supply Vs by first input end N
Into first voltage sensing unit 12, the closure of second switch 140 can make the hot voltage of alternating current power supply Vs
VSL enters second voltage sensing unit 14 by the second input L.
The voltage being input into by the ground wire (or live wire) of alternating current power supply Vs is by the first constriction 122 (or second
Constriction 142) after by first resistor network 124 (or second resistance network 144) partial pressure after resistor
Cross-pressure is formed on 136 (or resistors 156).If the cross-pressure being formed on resistor 136 (or resistor 156) is high
In the reverse conducting voltage of the first voltage stabilizing part 128 (or second voltage stabilizing part 148), then the first power switch 100 (or
Second power switch 102) lock source voltage equivalent to the two ends of the first voltage stabilizing part 128 voltage, and the first work(
Rate switchs 100 (or second power switch 102) conducting.
In short, when the ground wire voltage VSN normal power supplies of alternating current power supply Vs, the first power switch can be made
100 conductings, when the hot voltage VSL normal power supply of alternating current power supply Vs, can make the second power switch 102
Conducting.Conversely, when the ground wire voltage VSN of alternating current power supply Vs powers extremely, the first power switch 100
Cut-off, when hot voltage VSL of alternating current power supply Vs is powered extremely, can make the second power switch 102
Cut-off.
As the ground wire voltage VSN and hot voltage VSL all normal power supplies of alternating current power supply Vs, the first work(
Rate switch 100 and the second power switch 102 are all turned on, therefore illuminating part 1060 turns on and produce light, sense
Light part 1062 senses the light that illuminating part 1060 sends, and outfan OUT outputs are normal in high levle
Power supply signal, as shown in Figure 2.
When the ground wire voltage VSN of alternating current power supply Vs powers extremely, the first power switch 100 ends, the
Two power switch 102 are turned on, and illuminating part 1060 cannot produce light, therefore outfan OUT outputs are in low standard
The abnormal power supply signal of position.When hot voltage VSL of alternating current power supply Vs is powered extremely, the first power is opened
Close 100 to turn on, the second power switch 102 ends, illuminating part 1060 cannot produce light, therefore outfan
OUT abnormal power supply signals of the output in low level, as shown in Figure 2.
Similarly, when the ground wire voltage VSN and hot voltage VSL of alternating current power supply Vs all power extremely,
First power switch 100 and the second power switch 102 all end, and illuminating part 1060 cannot produce light,
Therefore outfan OUT abnormal power supply signals of the output in low level, as shown in Figure 2；Wherein, this is corresponded to
Whether the ground wire voltage VSN and hot voltage VSL that bright alternating voltage sensing device further is received be extremely corresponding defeated
Go out the signal of end input as shown in Table 1.
In sum, alternating voltage sensing device further of the invention detects respectively the ground wire voltage of alternating current power supply Vs
VSN and hot voltage VSL, and in ground wire voltage VSN and hot voltage VSL all normal power supplies, it is defeated
Go out to hold OUT to export normal power supply signal；In the ground wire voltage VSN or hot voltage of alternating current power supply Vs
There is abnormal power supply in VSL, or ground wire voltage VSN and hot voltage VSL are when all occurring abnormal power supply, defeated
Go out to hold OUT output abnormality power supply signals.Consequently, it is possible to can exactly judge that alternating current power supply Vs is powered
It is whether abnormal, it is to avoid when ground wire voltage VSN or hot voltage VSL occur abnormal power supply, still to export just
The situation of normal power supply signal.
Certainly, the present invention can also have other various embodiments, in the feelings without departing substantially from spirit of the invention and its essence
Under condition, those of ordinary skill in the art work as can make various corresponding changes and deformation according to the present invention, but
These corresponding changes and deformation should all belong to the protection domain of appended claims of the invention.
Claims (8)
1. a kind of alternating voltage sensing device further, is electrically connected to an alternating current power supply, it is characterised in that the exchange
Voltage sensing device is included：
One first input end, is electrically connected to a ground wire of the alternating current power supply；
One second input, is electrically connected to a live wire of the alternating current power supply；
One judging unit, comprising one first power switch, one second power switch and an outfan, this
One power switch and the second power switch concatenation, the outfan is coupled to second power switch；
One first voltage sensing unit, is electrically connected to the first input end and first power switch；And
One second voltage sensing unit, is electrically connected to second input and second power switch；
Wherein, the judging unit is when live wire and ground wire all normal power supplies of the alternating current power supply, by this
Outfan exports a normal power supply signal.
2. alternating voltage sensing device further as claimed in claim 1, it is characterised in that the judging unit in
There is abnormal power supply in the live wire of the alternating current power supply or the ground wire, or the live wire and the ground wire occur exception simultaneously
During power supply, by the abnormal power supply signal of outfan output one.
3. alternating voltage sensing device further as claimed in claim 2, it is characterised in that the judging unit is also
Comprising a photoelectrical coupler and two current-limiting resistors, the photoelectrical coupler includes an illuminating part and a sensitive piece,
The illuminating part is electrically connected to second power switch by a current-limiting resistor therein, the receipts light part optics coupling
The illuminating part is connected to, and is electrically connected to the outfan and another current-limiting resistor.
4. alternating voltage sensing device further as claimed in claim 3, it is characterised in that when the ground wire and should
When live wire powers normal, first power switch, second power switch, the illuminating part and the sensitive piece are all
Conducting, the outfan exports the normal operation signal.
5. alternating voltage sensing device further as claimed in claim 4, it is characterised in that the first voltage sense
Survey unit and include one first current limiting element, a first resistor network and one first voltage stabilizing part, the first current limliting unit
Part is electrically connected to the first resistor network, the first voltage stabilizing part be electrically connected to the first resistor network and this first
Power switch, the second voltage sensing unit includes one second current limiting element, a second resistance network and one the
Two voltage stabilizing parts, second current limiting element is electrically connected to the second resistance network, and the second voltage stabilizing part is electrically connected to
The second resistance network and second power switch.
6. alternating voltage sensing device further as claimed in claim 5, it is characterised in that the first voltage sense
Survey unit and also include a first switch, between the first input end and first current limiting element, and be electrically connected
The first input end and first current limiting element are connected to, the second voltage sensing unit is also opened comprising one second
Close, between second input and second current limiting element, and be electrically connected to second outfan and be somebody's turn to do
Second current limiting element.
7. the alternating voltage sensing device further as described in claim 5 or 6, it is characterised in that this is first electric
Pressure sensing unit also includes one first capacitor, and first capacitor is connected in parallel with the first voltage stabilizing part, should
Second voltage sensing unit also includes one second capacitor, and second capacitor is in parallel with the second voltage stabilizing part even
Connect.
8. alternating voltage sensing device further as claimed in claim 5, it is characterised in that the first resistor net
Network and the second resistance network include respectively multiple resistors being connected in series, in the first resistor network
Resistor is connected in parallel with the first voltage stabilizing part, the resistor in the second resistance network and second voltage stabilizing
Part is connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510688322.4A CN106610443B (en) | 2015-10-22 | 2015-10-22 | AC-input voltage sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510688322.4A CN106610443B (en) | 2015-10-22 | 2015-10-22 | AC-input voltage sensing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106610443A true CN106610443A (en) | 2017-05-03 |
| CN106610443B CN106610443B (en) | 2019-05-24 |
Family
ID=58610779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510688322.4A Active CN106610443B (en) | 2015-10-22 | 2015-10-22 | AC-input voltage sensing device |
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| Country | Link |
|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001045756A (en) * | 1999-07-27 | 2001-02-16 | Canon Inc | Power-supply apparatus |
| CN201167073Y (en) * | 2008-03-10 | 2008-12-17 | 上海益而益电器制造有限公司 | Electric fault breaking apparatus with a rapid reset characteristic |
| CN202939206U (en) * | 2012-12-04 | 2013-05-15 | 成都芯源系统有限公司 | Voltage detection circuit |
| CN203278632U (en) * | 2013-05-03 | 2013-11-06 | 旭隼科技股份有限公司 | Uninterrupted power supply (UPS) |
| CN103713258A (en) * | 2012-10-08 | 2014-04-09 | 力铭科技股份有限公司 | Relay failure detection circuit |
| EP2779407A3 (en) * | 2013-03-13 | 2015-02-25 | Power Integrations, Inc. | Load-selective input voltage sensor |
-
2015
- 2015-10-22 CN CN201510688322.4A patent/CN106610443B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001045756A (en) * | 1999-07-27 | 2001-02-16 | Canon Inc | Power-supply apparatus |
| CN201167073Y (en) * | 2008-03-10 | 2008-12-17 | 上海益而益电器制造有限公司 | Electric fault breaking apparatus with a rapid reset characteristic |
| CN103713258A (en) * | 2012-10-08 | 2014-04-09 | 力铭科技股份有限公司 | Relay failure detection circuit |
| CN202939206U (en) * | 2012-12-04 | 2013-05-15 | 成都芯源系统有限公司 | Voltage detection circuit |
| EP2779407A3 (en) * | 2013-03-13 | 2015-02-25 | Power Integrations, Inc. | Load-selective input voltage sensor |
| CN203278632U (en) * | 2013-05-03 | 2013-11-06 | 旭隼科技股份有限公司 | Uninterrupted power supply (UPS) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106610443B (en) | 2019-05-24 |
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