CN105098722A - Power supply device with input voltage detection function, and operation method thereof - Google Patents
Power supply device with input voltage detection function, and operation method thereof Download PDFInfo
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- CN105098722A CN105098722A CN201410208241.5A CN201410208241A CN105098722A CN 105098722 A CN105098722 A CN 105098722A CN 201410208241 A CN201410208241 A CN 201410208241A CN 105098722 A CN105098722 A CN 105098722A
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Abstract
The invention relates to a power supply device with an input voltage detection function, and an operation method thereof. The device comprises a power supply input side and an input detection module. The power supply input side is provided with a first input terminal and a second input terminal which are correspondingly in electric connection with the live wire and ground wire of an AC power supply. The input detection module is provided with two input terminals which are respectively in electric connection with the first input terminal and the second input terminal. When detecting the abnormality of the live wire or/and the ground wire, the input detection module generates a detection signal in order to stop the operation of the power supply device, and furthermore protect the power supply device.
Description
Technical field
The present invention relates to a kind of power supply device and method of operation thereof, particularly relate to a kind of power supply device and the method for operation thereof with input voltage measurement.
Background technology
In recent years, along with the development and progression of science and technology, the electronic product with difference in functionality of all kinds is also developed gradually, and, the electronic product of these difference in functionalitys not only meets the different demands of user, also incorporate in the daily life of user further, and then provide and live more easily.These electronic products are made up of various electronic building brick, and supply voltage needed for each electronic building brick is incomplete same, therefore, its normal operation is made to each electronic building brick in order to provide suitable voltage, these electronic products need, by power supply unit (powersupply), AC power is converted to suitable voltage, power to these electronic products.In addition, in order to avoid there is abnormal power supply situation when AC power, causing this power supply unit correctly cannot perform Power convert, more very causing this power supply unit to damage, therefore, current art is usually at the input side installing testing circuit of this power supply unit.Refer to the circuitry block schematic diagram that Fig. 1 is correlation technique power supply unit input detecting circuit.Whether this power supply unit is powered by an external ac power source VS, and an AC detection circuit 10A is to be installed in the input side of this power supply unit, abnormal in order to this external ac power source VS supply power voltage of direct-detection.
Refer to the detection inefficacy schematic diagram that Fig. 2 is correlation technique power supply unit input detecting circuit.When live wire VSL and ground wire VSN occurs abnormal simultaneously, this AC detection circuit 10A produces the protective circuit of a signal to this power supply unit, to provide protection to this power supply unit.But, due to the earth point of this output system 20A and this power supply unit and this AC detection circuit 10A earth point altogether, therefore when wherein one occurs abnormal for the live wire of this external ac power source VS or ground wire, this external ac power source VS will via this AC detection circuit 10A, primary Ioops LS is formed with the earth point of this output system 20A, also therefore, this AC detection circuit 10A for the live wire of this external ac power source VS or ground wire wherein one there is abnormal detection and will lose efficacy, make this AC detection circuit 10A cannot produce the protective circuit of this signal to this power supply unit, cause losing efficacy to this power supply protection.
Therefore, how to design a kind of input voltage measurement system and method for operation thereof, by provide one without independent grounding point input detection module or there is the input detection module of an earth point completely isolated with the earth point of power supply unit, there is abnormal power supply as this AC power of detection, and then turn off the operation of this power supply unit, for these needs overcome and solve one large problem.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
An object of the present invention is to provide a kind of power supply device with input voltage measurement, to overcome the problem of prior art.Therefore the power supply device that the present invention should have an input voltage measurement comprises a mains input side and and inputs detection module.This mains input side has a first input end and one second input, and this first input end is electrically connected a live wire of an AC power, and this second input is electrically connected a ground wire of this AC power.This input detection module has one first test side and one second test side, and this first test side is electrically connected this first input end, and this second test side is electrically connected this second input.Wherein, when this live wire or this ground wire occur abnormal, or when this live wire occurs abnormal with this ground wire simultaneously, this input detection module produces a detection signal, operates, and then protect this power supply device to turn off this power supply device.
Alternatively, described input detection module comprises: a two-way photoelectrical coupler; And a current-limiting resistance, be electrically connected described bi-directional light electric coupling, to limit the size of current flowing through described bi-directional light electric coupling; Wherein said current-limiting resistance is electrically connected described bi-directional light electric coupling to form a series arm, and described series arm two ends are described first test side and described second test side.
Alternatively, when described AC power is to described power supply device normal power supply, described bi-directional light electric coupling is conducting state, and continuing to export described detection signal is a normal detection signal; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously, described bi-directional light electric coupling is cut-off state, stops exporting described normal detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
Alternatively, described input detection module and described power supply device are the ground connection isolation.
Alternatively, described input detection module comprises: a full-wave rectifier, has one first rectification input, one second rectification input, one first rectification output end and one second rectification output end; Wherein said first rectification input is described first test side, and described second rectification input is described second test side; One diode, has an anode and a negative electrode, and described first rectification output end of described anode electrical connection of described diode; One first resistance, has a first end and one second end; One the first transistor switch, there is one source pole, a drain and a gate, and the described first end of described first resistance of described drain electrical connection of described the first transistor switch, and described second end of described first resistance is electrically connected the described negative electrode of described diode; Described gate described first rectification output end of electrical connection of described the first transistor switch and the described anode of described diode; One photoelectrical coupler, has an anode and a negative electrode; One second resistance, has a first end and one second end; One transistor seconds switch, there is one source pole, a drain and a gate, and the described first end of described second resistance of described drain electrical connection of described transistor seconds switch, and described second end of described second resistance is electrically connected the described negative electrode of described photoelectrical coupler; The described gate of described transistor seconds switch is electrically connected the described drain of described the first transistor switch and the described first end of described first resistance; And an electric capacity, there is a first end and one second end, and the described first end of described electric capacity is electrically connected the described anode of described photoelectrical coupler and the described negative electrode of described diode; Described source electrode and described second rectification output end of described second end of described electric capacity, the described source electrode of described the first transistor switch, described transistor seconds switch connect a module ground point.
Alternatively, when described AC power is to described power supply device normal power supply, described AC power operates via described full-wave rectifier full-wave rectification, to export a commutating voltage, described commutating voltage is with the first transistor switch described in conducting, and described commutating voltage is to described capacitor charging, and then described transistor seconds switch and described photoelectrical coupler is made to be all cut-off state; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously; described AC power there is no and exports described full-wave rectifier to; described the first transistor switch is made to be cut-off state; and the discharge path electric discharge that described electric capacity is formed via described photoelectrical coupler, described second resistance and described transistor seconds switch; and then to make described photoelectrical coupler export described detection signal be an anomaly detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
Alternatively, the earth point of described module ground point and described power supply device is completely isolated.
Another object of the present invention is to the method for operation that a kind of input voltage measurement system is provided, to overcome the problem of prior art.Therefore the method for operation of this input voltage measurement system of the present invention comprises the following steps: that (a) provides this power supply device with a mains input side, this mains input side has a first input end and one second input, and this first input end is electrically connected a live wire of an AC power, this second input is electrically connected a ground wire of this AC power; B () provides an input detection module, have one first test side and one second test side, and this first test side is electrically connected this first input end, this second test side is electrically connected this second input; And (c) is when that this input detection module detects that this live wire or this ground wire occur is abnormal; or this live wire and this ground wire are when occurring abnormal simultaneously; this input detection module produces a detection signal, to turn off the operation of this power supply device, and then protects this power supply device.
Alternatively, described input detection module comprises: a two-way photoelectrical coupler; And a current-limiting resistance, be electrically connected described bi-directional light electric coupling, to limit the size of current flowing through described bi-directional light electric coupling; Wherein said current-limiting resistance is electrically connected described bi-directional light electric coupling to form a series arm, and described series arm two ends are described first test side and described second test side.
Alternatively, when described AC power is to described power supply device normal power supply, described bi-directional light electric coupling is conducting state, and continuing to export described detection signal is a normal detection signal; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously, described bi-directional light electric coupling is cut-off state, stops exporting described normal detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
Alternatively, described input detection module and described power supply device are the ground connection isolation.
Alternatively, described input detection module comprises: a full-wave rectifier, has one first rectification input, one second rectification input, one first rectification output end and one second rectification output end; Wherein said first rectification input is described first test side, and described second rectification input is described second test side; One diode, has an anode and a negative electrode, and described first rectification output end of described anode electrical connection of described diode; One first resistance, has a first end and one second end; One the first transistor switch, there is one source pole, a drain and a gate, and the described first end of described first resistance of described drain electrical connection of described the first transistor switch, and described second end of described first resistance is electrically connected the described negative electrode of described diode; Described gate described first rectification output end of electrical connection of described the first transistor switch and the described anode of described diode; One photoelectrical coupler, has an anode and a negative electrode; One second resistance, has a first end and one second end; One transistor seconds switch, there is one source pole, a drain and a gate, and the described first end of described second resistance of described drain electrical connection of described transistor seconds switch, and the second end of described second resistance is electrically connected the described negative electrode of described photoelectrical coupler; The described gate of described transistor seconds switch is electrically connected the described drain of described the first transistor switch and the described first end of described first resistance; And an electric capacity, there is a first end and one second end, and the described first end of described electric capacity is electrically connected the described anode of described photoelectrical coupler and the described negative electrode of described diode; Described source electrode and described second rectification output end of described second end of described electric capacity, the described source electrode of described the first transistor switch, described transistor seconds switch connect a module ground point.
Alternatively, when described AC power is to described power supply device normal power supply, described AC power operates via described full-wave rectifier full-wave rectification, to export a commutating voltage, described commutating voltage is with the first transistor switch described in conducting, and described commutating voltage is to described capacitor charging, and then described transistor seconds switch and described photoelectrical coupler is made to be all cut-off state; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously; described AC power there is no and exports described full-wave rectifier to; described the first transistor switch is made to be cut-off state; and the discharge path electric discharge that described electric capacity is formed via described photoelectrical coupler, described second resistance and described transistor seconds switch; and then to make described photoelectrical coupler export described detection signal be an anomaly detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
Alternatively, the earth point of described module ground point and described power supply device is completely isolated.
In order to technology, means and effect that the present invention takes for reaching predetermined object further can be understood, refer to following detailed description for the present invention and accompanying drawing, believe object of the present invention, feature and feature, go deep into and concrete understanding when one can be obtained thus, but institute's accompanying drawings only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuitry block schematic diagram of prior art power supply unit input detecting circuit;
Fig. 2 is the detection inefficacy schematic diagram of prior art power supply unit input detecting circuit;
Fig. 3 is the circuitry block schematic diagram that the present invention has the power supply device of input voltage measurement;
Fig. 4 is the input detection module first embodiment circuitry block schematic diagram of power supply device of the present invention;
Fig. 5 is the input detection module second embodiment circuitry block schematic diagram of power supply device of the present invention; And
Fig. 6 is the flow chart that the present invention has the power supply device method of operation of input voltage measurement.
Reference numeral:
﹝ Xian You Ji Shu ﹞
VS external ac power source
VSL live wire
VSN ground wire
10A AC detection circuit
20A output system
LS loop
This Fa of ﹝ Ming ﹞
90 power supply devices
10 input detection modules
101 input detection modules
102 input detection modules
1011 bi-directional light electric couplings
1012 current-limiting resistances
1021 full-wave rectifiers
1022 diodes
1023 first resistance
1024 the first transistor switches
1025 electric capacity
1026 photoelectrical couplers
1027 second resistance
1028 transistor seconds switches
VS AC power
VSL live wire
VSN ground wire
Si mains input side
L live wire end
N ground terminal
Gm module ground point
S10 ~ S30 step
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The element described in an accompanying drawing of the present invention or a kind of execution mode and feature can combine with the element shown in one or more other accompanying drawing or execution mode and feature.It should be noted that for purposes of clarity, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not paying creative work, all belongs to the scope of protection of the invention.
In the following embodiment of the present invention, the sequence number of embodiment and/or sequencing are only convenient to describe, and do not represent the quality of embodiment.The description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
The technical content and a detailed description for the present invention, coordinate graphic being described as follows:
Referring to Fig. 3 is the circuitry block schematic diagram that the present invention has the power supply device of input voltage measurement.This power supply device with input voltage measurement comprises a power supply device 90 and with a mains input side Si and inputs detection module 10.This mains input side Si has a first input end and one second input, and wherein, in the present embodiment, this first input end is a live wire end L, and this second input is a ground terminal N.A this live wire end L live wire VSL and ground wire VSN of being electrically connected an external ac power source VS corresponding to this ground terminal N.Wherein, this power supply device 90 is powered by this external ac power source VS by this live wire VSL and this ground wire VSN.Moreover this power supply device 90 can be a power supply unit (powersupply), but not as limit, as long as the supply unit of being powered by AC power is all included in scope of the present invention.
This input detection module 10 is electrically connected between this live wire end L of this mains input side Si and this ground terminal N, that is, this input detection module 10 has two test sides (sign), be respectively one first test side and one second test side, and this first test side is corresponding with this second test side is electrically connected this live wire end L and this ground terminal N.Wherein, when this AC power VS powers to this power supply device 90, when at least this live wire VSL or this ground wire VSN occurs abnormal, this input detection module 10 is to control the operation of this power supply device 90 forbidden energy.That is when this live wire VSL or this ground wire VSN occurs abnormal, or when this live wire VSL and this ground wire VSN occurs abnormal, this input detection module 10 produces a detection signal, operates, and then protect this power supply device 90 to turn off this power supply device 90 simultaneously.As for the operating instruction of this input voltage measurement system, by hereinafter there being detailed elaboration.
Refer to the input detection module first embodiment circuitry block schematic diagram that Fig. 4 is power supply device of the present invention.In the present embodiment, this input detection module 101 comprises a two-way photoelectrical coupler (bi-directionalopticalcoupler) 1011 and a current-limiting resistance (current-limitingresistor) 1012.For the present embodiment, this bi-directional light electric coupling 1011 one end is connected in series this current-limiting resistance 1012 one end, and this bi-directional light electric coupling 1011 other end connects this ground terminal N of this mains input side Si, and this current-limiting resistance 1012 other end connects this live wire end L of this mains input side Si.But not as limit, this bi-directional light electric coupling 1011 other end also can connect this live wire end L of this mains input side Si, and this current-limiting resistance 1012 other end connects this ground terminal N of this mains input side Si, so, effect that mains input side detects can be reached equally.Be worth mentioning; in this example; this input detection module 101 there is no independent grounding point; therefore; this input detection module 101 can be completely isolated with the earth point of this power supply device 90; so, this input detection module 101 can be avoided to cause this input detection module 101 to detect the misoperation operated with the common place of power supply device 90, cause shielding failure.
When this AC power VS is to this power supply device 90 normal power supply, that is, when this live wire VSL and this ground wire VSN sends out and is all normal, this AC power VS passes through this input detection module 101 to this ground terminal N by this live wire end L, or pass through this input detection module 101 to this live wire end L by this ground terminal N, make this bi-directional light electric coupling 1011 be conducting state, therefore, this bi-directional light electric coupling 1011 continues the normal detection signal (not graphic) of output one.When this power supply device 90 receives this normal detection signal, then can judge that this AC power VS is to this power supply device 90 normal power supply, therefore, maintain this power supply device 90 normal running.
When this live wire VSL or this ground wire VSN occurs abnormal, or this live wire VSL and this ground wire VSN is when occurring abnormal simultaneously, this AC power VS there is no and exports this input detection module 101 to, in other words, this input detection module 101 does not receive this AC power VS, make this bi-directional light electric coupling 1011 be cut-off state, therefore, this bi-directional light electric coupling 1011 stops exporting this normal detection signal.When this power supply device 90 does not receive this normal detection signal; then judge that this live wire VSL or this ground wire VSN occurs abnormal; or there is exception in this live wire VSL and this ground wire VSN simultaneously; therefore; start a protection mechanism (not graphic) of this power supply device 90; to turn off the operation of this power supply device 90, and then protect this power supply device 90.Owing to driving the electric current needed for this bi-directional light electric coupling 1011 to be milliampere (mA) grade, therefore, this current-limiting resistance 1012 is set as kilohm (Kohm) grade usually, to limit the size of current flowing through this bi-directional light electric coupling 1011.
Refer to the input detection module second embodiment circuitry block schematic diagram that Fig. 5 is power supply device of the present invention.In the present embodiment, this input detection module 102 mainly comprises full-wave rectifier 1021, diode 1022,1 first resistance 1023, one the first transistor switch 1024, electric capacity 1025, one photoelectrical coupler 1026,1 second resistance 1027 and a transistor seconds switch 1028.For the present embodiment, the anode of this diode 1022 is electrically connected the first output of this full-wave rectifier 1021.The drain (drain) of this first transistor switch 1024 is electrically connected the first end of this first resistance 1023, and the second end of this first resistance 1023 is electrically connected the negative electrode of this diode 1022.The gate (gate) of this first transistor switch 1024 is electrically connected the first output of this full-wave rectifier 1021 and the anode of this diode 1022 by a resistance (sign).The drain of this transistor seconds switch 1028 is electrically connected the first end of this second resistance 1027, and the second end of this second resistance 1027 is electrically connected the negative electrode of this photoelectrical coupler 1026.The gate of this transistor seconds switch 1028 is electrically connected the drain of this first transistor switch 1024 and the first end of this first resistance 1023.The anode of this photoelectrical coupler 1026 is electrically connected the negative electrode of this diode 1022 and the first end of this electric capacity 1025.Second end of this electric capacity 1025, the source electrode (source) of this first transistor switch 1024, the source electrode of this transistor seconds switch 1028 and the second output of this full-wave rectifier 1021 are electrically connected a module ground point Gm, wherein, this module ground point Gm of this input detection module 102 and the earth point of this power supply device 90 completely isolated.In addition, two input correspondences of this full-wave rectifier 1021 are electrically connected this live wire end L and this ground terminal N of this mains input side Si.
When this AC power VS is to this power supply device 90 normal power supply, that is when this live wire VSL and this ground wire VSN sends out and is all normal, this AC power VS, via after this full-wave rectifier 1021 full-wave rectification operation, exports a commutating voltage.On the one hand, the branch pressure voltage that produces after two divider resistance dividing potential drops of this commutating voltage is with this first transistor switch 1024 of conducting; On the other hand, this commutating voltage charges to this electric capacity 1025 via this diode 1022.Now, this transistor seconds switch 1028 is all cut-off state with this photoelectrical coupler 1026.
When this live wire VSL or this ground wire VSN occurs abnormal, or this live wire VSL and this ground wire VSN is when occurring abnormal simultaneously, this AC power VS there is no and exports this full-wave rectifier 1021 to, therefore, when this full-wave rectifier 1021 does not have output voltage, this first transistor switch 1024 is cut-off state.Now, the discharge path that this electric capacity 1025 is formed via this photoelectrical coupler 1026, this second resistance 1027 and this transistor seconds switch 1028 discharges.So; this photoelectrical coupler 1026 will be made to export the protection mechanism (not graphic) of an anomaly detection signal (not graphic) to this power supply device 90; to turn off the operation of this power supply device 90, and then protect this power supply device 90.
Referring to Fig. 6 is the flow chart that the present invention has the power supply device method of operation of input voltage measurement.The method of operation of this input voltage measurement system comprises the following steps.First, this power supply device (S10) that has a mains input side is provided.This mains input side has a first input end and one second input, and this first input end live wire and ground wire of being electrically connected an AC power corresponding to this second input.Wherein, in the present embodiment, this first input end is a live wire end, and this second input is a ground terminal.This power supply device is powered by this external ac power source by this live wire and this ground wire.Moreover this power supply device can be a power supply unit (powersupply), but not as limit.Then, an input detection module (S20) is provided.This input detection module is electrically connected between this live wire end and this ground terminal of this mains input side, that is, this input detection module has two test sides, be respectively one first test side and one second test side, and this first test side is corresponding with this second test side is electrically connected this live wire end and this ground terminal.Finally; when this input detection module, to detect that this live wire or this ground wire occur abnormal, or when this live wire and this ground wire occur abnormal simultaneously, this input detection module produces a detection signal; to turn off the operation of this power supply device, and then protect this power supply device (S30).Be worth mentioning, this input detection module has two kinds of execution modes, as described below:
One, this input detection module comprises a two-way photoelectrical coupler and a current-limiting resistance.This bi-directional light electric coupling one end is connected in series this current-limiting resistance one end, and this bi-directional light electric coupling other end connects this ground terminal of this mains input side, and this current-limiting resistance other end connects this live wire end of this mains input side.But not as limit, this bi-directional light electric coupling other end also can connect this live wire end of this mains input side, and this current-limiting resistance other end connects this ground terminal of this mains input side, so, effect that mains input side detects can be reached equally.Be worth mentioning; this input detection module there is no independent grounding point; therefore; this input detection module can be completely isolated with the earth point of this power supply device; so; the common place of this input detection module and power supply device can be avoided to cause this input detection module to detect the misoperation operated, cause shielding failure.
When this AC power is to this power supply device normal power supply, that is, when this live wire and this ground wire are sent out and are all normal, this AC power passes through this input detection module to this ground terminal by this live wire end, or pass through this input detection module to this live wire end by this ground terminal, make this bi-directional light electric coupling be conducting state, therefore, this bi-directional light electric coupling continues the normal detection signal of output one.When this power supply device receives this normal detection signal, then can judge that this AC power is to this power supply device normal power supply, therefore, maintain this power supply device normal running.
When this live wire or this ground wire occur abnormal, or this live wire and this ground wire are when occurring abnormal simultaneously, this AC power there is no and exports this input detection module to, in other words, this input detection module does not receive this AC power, make this bi-directional light electric coupling be cut-off state, therefore, this bi-directional light electric coupling stops exporting this normal detection signal.When this power supply device does not receive this normal detection signal; then judge that this live wire or this ground wire occur abnormal; or there is exception in this live wire and this ground wire simultaneously; therefore; start a protection mechanism of this power supply device; to turn off the operation of this power supply device, and then protect this power supply device.
Two, this input detection module mainly comprises a full-wave rectifier, a diode, one first resistance, a first transistor switch, an electric capacity, a photoelectrical coupler, one second resistance and a transistor seconds switch.The anode of this diode is electrically connected the first output of this full-wave rectifier.The drain of this first transistor switch is electrically connected the first end of this first resistance, and the second end of this first resistance is electrically connected the negative electrode of this diode.The gate of this first transistor switch is electrically connected the first output of this full-wave rectifier and the anode of this diode by a resistance.The drain of this transistor seconds switch is electrically connected the first end of this second resistance, and the second end of this second resistance is electrically connected the negative electrode of this photoelectrical coupler.The gate of this transistor seconds switch is electrically connected the drain of this first transistor switch and the first end of this first resistance.The anode of this photoelectrical coupler is electrically connected the negative electrode of this diode and the first end of this electric capacity.Second end of this electric capacity, the source electrode of this first transistor switch, the source electrode of this transistor seconds switch and the second output of this full-wave rectifier are electrically connected a module ground point, wherein, this module ground point of this input detection module and the earth point of this power supply device completely isolated.In addition, two input correspondences of this full-wave rectifier are electrically connected this live wire end and this ground terminal of these mains input side.
When this AC power is to this power supply device normal power supply, that is when this live wire and this ground wire are sent out and be all normal, this AC power, via after this full-wave rectifier full-wave rectification operation, exports a commutating voltage.On the one hand, the branch pressure voltage that produces after two divider resistance dividing potential drops of this commutating voltage is with this first transistor switch of conducting; On the other hand, this commutating voltage is via this capacitor charging of this diode pair.Now, this transistor seconds switch and this photoelectrical coupler are all cut-off state.
When this live wire or this ground wire occur abnormal, or when this live wire and this ground wire occur abnormal simultaneously, this AC power there is no and exports this full-wave rectifier to, and therefore, when this full-wave rectifier does not have output voltage, this first transistor switch is cut-off state.Now, the discharge path that this electric capacity is formed via this photoelectrical coupler, this second resistance and this transistor seconds switch discharges.So, by making this photoelectrical coupler export the protection mechanism of an anomaly detection signal to this power supply device, to turn off the operation of this power supply device, and then this power supply device is protected.
In sum, the present invention has following feature & benefits:
1, according to the first embodiment of this input detection module 101 of the present invention, by this input detection module 101 without independent grounding point, reach completely isolated with the earth point of this power supply device 90, with the misoperation avoiding this input detection module 101 to detect operation, cause the shielding failure to this power supply device 90; According to the second embodiment of this input detection module 102 of the present invention, by this module ground point Gm of this input detection module 102 and the earth point of this power supply device 90 completely isolated, with the misoperation avoiding this input detection module 102 to detect operation, cause the shielding failure to this power supply device 90; And
2, according to the first embodiment of this input detection module 101 of the present invention, when this input detection module 101 detects that abnormal power supply occurs this AC power VS, this bi-directional light electric coupling 1011 is cut-off state, to stop exporting this normal detection signal, to turn off the operation of this power supply device 90; According to the second embodiment of this input detection module 102 of the present invention; when this input detection module 102 detects that abnormal power supply occurs this AC power VS; this photoelectrical coupler 1026 is conducting state; to export an anomaly detection signal; and then turn off the operation of this power supply device 90, reach effect of this power supply device 90 of protection.
The above, be only the detailed description of preferred embodiment of the present invention and graphic, feature of the present invention is not limited thereto, and be not used to limit the present invention, all scopes of the present invention should be as the criterion with following claim, and all embodiments of closing spirit change similar with it in the present patent application the scope of the claims, all should be included in scope of the present invention, those skilled in the art in the field of the invention, can think easily and change or modify and all can be encompassed in the scope of the claims of following this case.Although last it is noted that described the present invention and advantage thereof in detail above, be to be understood that and can carry out various change when not exceeding the spirit and scope of the present invention limited by appended claim, substituting and converting.And scope of the present invention is not limited only to the specific embodiment of process, equipment, means, method and step described by specification.One of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use perform the function substantially identical with corresponding embodiment described herein or obtain and its substantially identical result, existing and that will be developed in the future process, equipment, means, method or step according to the present invention.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (14)
1. there is a power supply device for input voltage measurement, it is characterized in that, comprising:
One mains input side, has a first input end and one second input, and described first input end is a live wire of electrical connection one AC power, and described second input is a ground wire of the described AC power of electrical connection; And
One input detection module, has one first test side and one second test side, and described first test side is the described first input end of electrical connection, and described second test side is described second input of electrical connection;
Wherein, when described input detection module, to detect that described live wire or described ground wire occur abnormal, or when described live wire and described ground wire occur abnormal simultaneously, described input detection module produces a detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
2. have the power supply device of input voltage measurement according to claim 1, it is characterized in that, described input detection module comprises:
One two-way photoelectrical coupler; And
One current-limiting resistance, is electrically connected described bi-directional light electric coupling, to limit the size of current flowing through described bi-directional light electric coupling; Wherein said current-limiting resistance is electrically connected described bi-directional light electric coupling to form a series arm, and described series arm two ends are described first test side and described second test side.
3. there is the power supply device of input voltage measurement according to claim 2, it is characterized in that, when described AC power is to described power supply device normal power supply, described bi-directional light electric coupling is conducting state, and continuing to export described detection signal is a normal detection signal; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously, described bi-directional light electric coupling is cut-off state, stops exporting described normal detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
4. have the power supply device of input voltage measurement according to claim 2, it is characterized in that, described input detection module and described power supply device are the ground connection isolation.
5. have the power supply device of input voltage measurement according to claim 1, it is characterized in that, described input detection module comprises:
One full-wave rectifier, has one first rectification input, one second rectification input, one first rectification output end and one second rectification output end; Wherein said first rectification input is described first test side, and described second rectification input is described second test side;
One diode, has an anode and a negative electrode, and described first rectification output end of described anode electrical connection of described diode;
One first resistance, has a first end and one second end;
One the first transistor switch, there is one source pole, a drain and a gate, and the described first end of described first resistance of described drain electrical connection of described the first transistor switch, and described second end of described first resistance is electrically connected the described negative electrode of described diode; Described gate described first rectification output end of electrical connection of described the first transistor switch and the described anode of described diode;
One photoelectrical coupler, has an anode and a negative electrode;
One second resistance, has a first end and one second end;
One transistor seconds switch, there is one source pole, a drain and a gate, and the described first end of described second resistance of described drain electrical connection of described transistor seconds switch, and described second end of described second resistance is electrically connected the described negative electrode of described photoelectrical coupler; The described gate of described transistor seconds switch is electrically connected the described drain of described the first transistor switch and the described first end of described first resistance; And
One electric capacity, has a first end and one second end, and the described first end of described electric capacity is electrically connected the described anode of described photoelectrical coupler and the described negative electrode of described diode; Described source electrode and described second rectification output end of described second end of described electric capacity, the described source electrode of described the first transistor switch, described transistor seconds switch connect a module ground point.
6. there is the power supply device of input voltage measurement according to claim 5, it is characterized in that, when described AC power is to described power supply device normal power supply, described AC power operates via described full-wave rectifier full-wave rectification, to export a commutating voltage, described commutating voltage is with the first transistor switch described in conducting, and described commutating voltage is to described capacitor charging, and then makes described transistor seconds switch and described photoelectrical coupler be all cut-off state; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously; described AC power there is no and exports described full-wave rectifier to; described the first transistor switch is made to be cut-off state; and the discharge path electric discharge that described electric capacity is formed via described photoelectrical coupler, described second resistance and described transistor seconds switch; and then to make described photoelectrical coupler export described detection signal be an anomaly detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
7. have the power supply device of input voltage measurement according to claim 5, it is characterized in that, the earth point of described module ground point and described power supply device is completely isolated.
8. have a method of operation for the power supply device of input voltage measurement, it is characterized in that, described method comprises the following steps:
A () provides the described power supply device with a mains input side, described mains input side has a first input end and one second input, and described first input end is electrically connected a live wire of an AC power, described second input is electrically connected a ground wire of described AC power;
B () provides an input detection module, have one first test side and one second test side, and described first test side is electrically connected described first input end, described second input of described second test side electrical connection; And
C () is when that described input detection module detects that described live wire or described ground wire occur is abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously; described input detection module produces a detection signal, to turn off the operation of described power supply device, and then protects described power supply device.
9. have the method for operation of the power supply device of input voltage measurement according to claim 8, it is characterized in that, described input detection module comprises:
One two-way photoelectrical coupler; And
One current-limiting resistance, is electrically connected described bi-directional light electric coupling, to limit the size of current flowing through described bi-directional light electric coupling; Wherein said current-limiting resistance is electrically connected described bi-directional light electric coupling to form a series arm, and described series arm two ends are described first test side and described second test side.
10. there is the method for operation of the power supply device of input voltage measurement according to claim 9, it is characterized in that, when described AC power is to described power supply device normal power supply, described bi-directional light electric coupling is conducting state, and continuing to export described detection signal is a normal detection signal; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously, described bi-directional light electric coupling is cut-off state, stops exporting described normal detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
11. methods of operation according to claim 9 with the power supply device of input voltage measurement, it is characterized in that, described input detection module and described power supply device are the ground connection isolation.
12. methods of operation according to claim 8 with the power supply device of input voltage measurement, it is characterized in that, described input detection module comprises:
One full-wave rectifier, has one first rectification input, one second rectification input, one first rectification output end and one second rectification output end; Wherein said first rectification input is described first test side, and described second rectification input is described second test side;
One diode, has an anode and a negative electrode, and described first rectification output end of described anode electrical connection of described diode;
One first resistance, has a first end and one second end;
One the first transistor switch, there is one source pole, a drain and a gate, and the described first end of described first resistance of described drain electrical connection of described the first transistor switch, and described second end of described first resistance is electrically connected the described negative electrode of described diode; Described gate described first rectification output end of electrical connection of described the first transistor switch and the described anode of described diode;
One photoelectrical coupler, has an anode and a negative electrode;
One second resistance, has a first end and one second end;
One transistor seconds switch, there is one source pole, a drain and a gate, and the described first end of described second resistance of described drain electrical connection of described transistor seconds switch, and the second end of described second resistance is electrically connected the described negative electrode of described photoelectrical coupler; The described gate of described transistor seconds switch is electrically connected the described drain of described the first transistor switch and the described first end of described first resistance; And
One electric capacity, has a first end and one second end, and the described first end of described electric capacity is electrically connected the described anode of described photoelectrical coupler and the described negative electrode of described diode; Described source electrode and described second rectification output end of described second end of described electric capacity, the described source electrode of described the first transistor switch, described transistor seconds switch connect a module ground point.
13. according to the method for operation of power supply device described in claim 12 with input voltage measurement, it is characterized in that, when described AC power is to described power supply device normal power supply, described AC power operates via described full-wave rectifier full-wave rectification, to export a commutating voltage, described commutating voltage is with the first transistor switch described in conducting, and described commutating voltage is to described capacitor charging, and then makes described transistor seconds switch and described photoelectrical coupler be all cut-off state; When described live wire or described ground wire occur abnormal; or described live wire and described ground wire are when occurring abnormal simultaneously; described AC power there is no and exports described full-wave rectifier to; described the first transistor switch is made to be cut-off state; and the discharge path electric discharge that described electric capacity is formed via described photoelectrical coupler, described second resistance and described transistor seconds switch; and then to make described photoelectrical coupler export described detection signal be an anomaly detection signal; to turn off the operation of described power supply device, and then protect described power supply device.
14. according to the method for operation of power supply device described in claim 12 with input voltage measurement, and it is characterized in that, the earth point of described module ground point and described power supply device is completely isolated.
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| CN201410208241.5A CN105098722B (en) | 2014-05-16 | 2014-05-16 | Power supply device and its operating method with input voltage measurement |
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| CN201410208241.5A CN105098722B (en) | 2014-05-16 | 2014-05-16 | Power supply device and its operating method with input voltage measurement |
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| CN110235005A (en) * | 2017-12-19 | 2019-09-13 | 马鞍山市明珠电子科技有限公司 | Electrical equipment and the method for detecting electrical appliance ground state |
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| TWI269518B (en) * | 2001-04-06 | 2006-12-21 | Delta Electronics Inc | Power supply system having AC redundant and function of protecting AC power form electricity-inversed plug-in |
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| Publication number | Publication date |
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| CN105098722B (en) | 2018-07-06 |
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