CN204720956U - A kind of three-phase uninterrupted power supply with lack detection circuit - Google Patents

A kind of three-phase uninterrupted power supply with lack detection circuit Download PDF

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Publication number
CN204720956U
CN204720956U CN201520298900.9U CN201520298900U CN204720956U CN 204720956 U CN204720956 U CN 204720956U CN 201520298900 U CN201520298900 U CN 201520298900U CN 204720956 U CN204720956 U CN 204720956U
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China
Prior art keywords
detection circuit
resistance
level signal
power supply
uninterrupted power
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CN201520298900.9U
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Chinese (zh)
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梁宇
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Guangdong East Power Co Ltd
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Guangdong East Power Co Ltd
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Abstract

A kind of three-phase uninterrupted power supply with lack detection circuit, relate to pile defection technical field, its lack detection circuit comprises current detection circuit and electrical level signal generation circuit, current detection circuit is connected to the zero line of three-phase uninterrupted power supply, by being connected to current detection circuit at the zero line of three-phase uninterrupted power supply, when three-phase uninterrupted power phase shortage, three-phase electricity is uneven, the zero line of three-phase uninterrupted power supply has electric current to pass through, a kind of level signal can be exported by drive level signal generating circuit, when three-phase uninterrupted power supply normally works, its zero line does not have electric current to pass through, now can export another kind of level signal by drive level signal generating circuit, for three-phase uninterrupted power supply whether phase shortage can be judged according to level signal, can process early when finding phase shortage, the danger that may bring because of phase shortage is dropped to minimum.

Description

A kind of three-phase uninterrupted power supply with lack detection circuit
Technical field
The utility model relates to pile defection technical field, particularly relates to a kind of three-phase uninterrupted power supply with lack detection circuit.
Background technology
In prior art, a lot of equipment is all three-phase uninterrupted Power supply, equipment cisco unity malfunction may be caused even to burn out the harm such as equipment if there is phase shortage, even can damage the person if produce high suspended voltage, therefore find that phase shortage can drop to harm minimum early.
Utility model content
The purpose of this utility model is avoid weak point of the prior art and provide a kind of three-phase uninterrupted power supply with lack detection circuit, this three-phase uninterrupted power supply with lack detection circuit can Timeliness coverage whether phase shortage, by because the danger that phase shortage may be brought drops to minimum.
The purpose of this utility model is achieved through the following technical solutions:
A kind of three-phase uninterrupted power supply with lack detection circuit is provided, its lack detection circuit comprises current detection circuit and electrical level signal generation circuit, described current detection circuit is connected to the zero line of three-phase uninterrupted power supply, described current detection circuit has detected that neutral line current then drives described electrical level signal generation circuit to export a kind of level signal, and described current detection circuit detects and then drives described electrical level signal generation circuit to export another kind of level signal without neutral line current.
Described current detection circuit is set to Current Transmit I.
Described electrical level signal generation circuit comprises resistance R10, resistance R1, resistance R2, resistance R3, resistance R4, diode D1, electric capacity C1, optocoupler U1, LED 1 and triode Q1, one end of positive pole connecting resistance R10 of described diode D1 and the first output of current detection circuit, second output of another termination current detection circuit of described resistance R10, the negative pole of electric capacity C1, the negative pole of the photophore of optocoupler U1 and ground, the negative pole of diode D1 connects the positive pole of electric capacity C1 and one end of resistance R1, the positive pole of the photophore of another termination optocoupler U1 of resistance R1, one end of collector electrode connecting resistance R2 of the light-receiving device of optocoupler U1 and the base stage of triode Q1, another termination power VCC of resistance R2 and one end of resistance R3, one end of other end connecting resistance R4 of resistance R3 and the collector electrode of triode Q1, the emitter of triode Q1 connects emitter and the ground of the light-receiving device of optocoupler U1, the other end ground connection of resistance R4, the current collection very output of described triode Q1.
Described lack detection circuit also comprises light crossing-signal, between the collector electrode that described light crossing-signal is connected to the light-receiving device of described optocoupler U1 and the base stage of triode.
Described light crossing-signal is set to LED 1.
Described lack detection circuit also comprises audible alarm circuit, described audible alarm circuit is connected with the output of described electrical level signal generation circuit, the varying level signal that described audible alarm circuit exports according to described electrical level signal generation circuit and determine to report to the police or do not report to the police.
Described audible alarm circuit comprises digital signal processor and buzzer, and the input of described digital signal processor is connected with the output of described electrical level signal generation circuit, and the output of described digital signal processor is connected with described buzzer.
The beneficial effects of the utility model: the utility model is by being connected to current detection circuit at the zero line of three-phase uninterrupted power supply, when three-phase uninterrupted power phase shortage, three-phase electricity is uneven, the zero line of three-phase uninterrupted power supply has electric current to pass through, a kind of level signal can be exported by drive level signal generating circuit, when three-phase uninterrupted power supply normally works, its zero line does not have electric current to pass through, now can export another kind of level signal by drive level signal generating circuit, for three-phase uninterrupted power supply whether phase shortage can be judged according to level signal, can process early when finding phase shortage, the danger that may bring because of phase shortage is dropped to minimum.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further utility model, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is a kind of circuit diagram with the three-phase uninterrupted power supply of lack detection circuit of the present utility model, is lack detection circuit in dotted line frame.
Fig. 2 is the amplification circuit diagram of the lack detection circuit in Fig. 1.
Embodiment
With the following Examples the utility model is further described.
A kind of three-phase uninterrupted power supply with lack detection circuit of the present embodiment, as depicted in figs. 1 and 2, comprise current detection circuit and electrical level signal generation circuit, described current detection circuit is connected to the zero line of three-phase uninterrupted power supply, described current detection circuit has detected that neutral line current then drives described electrical level signal generation circuit to export a kind of level signal, and described current detection circuit detects and then drives described electrical level signal generation circuit to export another kind of level signal without neutral line current.
The present embodiment is by being connected to current detection circuit at the zero line of three-phase uninterrupted power supply, when three-phase uninterrupted power phase shortage, three-phase electricity is uneven, the zero line of three-phase uninterrupted power supply has electric current to pass through, a kind of level signal can be exported by drive level signal generating circuit, when three-phase uninterrupted power supply normally works, its zero line does not have electric current to pass through, now can export another kind of level signal by drive level signal generating circuit, for three-phase uninterrupted power supply whether phase shortage can be judged according to level signal, can process early when finding phase shortage, the danger that may bring because of phase shortage is dropped to minimum.
Wherein, described current detection circuit is set to Current Transmit 1, detects electric current more accurate.
Wherein, described electrical level signal generation circuit comprises resistance R10, resistance R1, resistance R2, resistance R3, resistance R4, diode D1, electric capacity C1, optocoupler U1, LED 1 and triode Q1, one end of positive pole connecting resistance R10 of described diode D1 and the first output of current detection circuit, second output of another termination current detection circuit of described resistance R10, the negative pole of electric capacity C1, the negative pole of the photophore of optocoupler U1 and ground, the negative pole of diode D1 connects the positive pole of electric capacity C1 and one end of resistance R1, the positive pole of the photophore of another termination optocoupler U1 of resistance R1, one end of collector electrode connecting resistance R2 of the light-receiving device of optocoupler U1 and the base stage of triode Q1, another termination power VCC of resistance R2 and one end of resistance R3, one end of other end connecting resistance R4 of resistance R3 and the collector electrode of triode Q1, the emitter of triode Q1 connects emitter and the ground of the light-receiving device of optocoupler U1, the other end ground connection of resistance R4, the current collection very output of described triode Q1.
Also comprise LED 1, between the collector electrode that described LED 1 is connected to the light-receiving device of described optocoupler U1 and the base stage of triode.
The operation principle of this circuit is as follows:
When three-phase uninterrupted power supply is normal, Current Transmit 1 detects that zero line does not have electric current to flow through, diode D1, electrochemical capacitor C1 does not work, the photophore of optocoupler U1 not electric, therefore the light-receiving device not conducting of optocoupler U1, now VCC is through LED 1, be added on the B pole (base stage) of triode Q1, Q1 conducting, LED 1 is luminous, the C pole (collector electrode) of triode Q1 and E pole (emitter) conducting, E pole (emitter) ground connection, output low level, illustrates three-phase uninterrupted power supply not phase shortage.
When three-phase uninterrupted power phase shortage, detect that neutral line current flows through by Current Transmit 1, Current Transmit 1 is added to optocoupler U1 after entering current limliting after amplifying after diode D1 rectification and electrochemical capacitor C1 filtering, now optocoupler U1 works, 3 of U1,4 pin conductings, the 3 pin ground connection of U1, therefore 4 pin level are 0V(does not consider PN junction pressure drop), now LED 1 input terminal voltage is 0V, and now light-emitting diode is not luminous, and triode Q1 does not work, VCC exports high level after resistance R2 and R4 dividing potential drop, and three-phase uninterrupted power phase shortage is described.
Wherein, also comprise audible alarm circuit, described audible alarm circuit is connected with the output of described electrical level signal generation circuit, the varying level signal that described audible alarm circuit exports according to described electrical level signal generation circuit and determine to report to the police or do not report to the police.
Concrete, described audible alarm circuit comprises digital signal processor and buzzer, and the input of described digital signal processor is connected with the output of described electrical level signal generation circuit, and the output of described digital signal processor is connected with described buzzer.
The low level signal exported when the collector electrode of triode Q1 delivers to digital signal processor, and digital signal processor detects low level signal, then do not drive buzzer warning, and such staff is just without the need to making any counter-measure; The high level signal exported when the collector electrode of triode Q1 delivers to digital signal processor, digital signal processor detects high level signal, then drive buzzer warning, staff hears that buzzer warning just can determine that whether controlling uninterrupted power supply turns battery mode in time.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection range; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.

Claims (7)

1. one kind has the three-phase uninterrupted power supply of lack detection circuit, it is characterized in that: its lack detection circuit comprises current detection circuit and electrical level signal generation circuit, described current detection circuit is connected to the zero line of three-phase uninterrupted power supply, described current detection circuit has detected that neutral line current then drives described electrical level signal generation circuit to export a kind of level signal, and described current detection circuit detects and then drives described electrical level signal generation circuit to export another kind of level signal without neutral line current.
2. a kind of three-phase uninterrupted power supply with lack detection circuit as claimed in claim 1, is characterized in that: described current detection circuit is set to Current Transmit I.
3. a kind of three-phase uninterrupted power supply with lack detection circuit as claimed in claim 1, it is characterized in that: described electrical level signal generation circuit comprises resistance R10, resistance R1, resistance R2, resistance R3, resistance R4, diode D1, electric capacity C1, optocoupler U1, LED 1 and triode Q1, one end of positive pole connecting resistance R10 of described diode D1 and the first output of current detection circuit, second output of another termination current detection circuit of described resistance R10, the negative pole of electric capacity C1, the negative pole of the photophore of optocoupler U1 and ground, the negative pole of diode D1 connects the positive pole of electric capacity C1 and one end of resistance R1, the positive pole of the photophore of another termination optocoupler U1 of resistance R1, one end of collector electrode connecting resistance R2 of the light-receiving device of optocoupler U1 and the base stage of triode Q1, another termination power VCC of resistance R2 and one end of resistance R3, one end of other end connecting resistance R4 of resistance R3 and the collector electrode of triode Q1, the emitter of triode Q1 connects emitter and the ground of the light-receiving device of optocoupler U1, the other end ground connection of resistance R4, the current collection very output of described triode Q1.
4. a kind of three-phase uninterrupted power supply with lack detection circuit as claimed in claim 3, it is characterized in that: described lack detection circuit also comprises light crossing-signal, between the collector electrode that described light crossing-signal is connected to the light-receiving device of described optocoupler U1 and the base stage of triode.
5. a kind of three-phase uninterrupted power supply with lack detection circuit as claimed in claim 4, is characterized in that: described light crossing-signal is set to LED 1.
6. a kind of three-phase uninterrupted power supply with lack detection circuit as described in claim 1 or 4, it is characterized in that: described lack detection circuit also comprises audible alarm circuit, described audible alarm circuit is connected with the output of described electrical level signal generation circuit, the varying level signal that described audible alarm circuit exports according to described electrical level signal generation circuit and determine to report to the police or do not report to the police.
7. a kind of three-phase uninterrupted power supply with lack detection circuit as claimed in claim 6, it is characterized in that: described audible alarm circuit comprises digital signal processor and buzzer, the input of described digital signal processor is connected with the output of described electrical level signal generation circuit, and the output of described digital signal processor is connected with described buzzer.
CN201520298900.9U 2015-05-11 2015-05-11 A kind of three-phase uninterrupted power supply with lack detection circuit Active CN204720956U (en)

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Application Number Priority Date Filing Date Title
CN201520298900.9U CN204720956U (en) 2015-05-11 2015-05-11 A kind of three-phase uninterrupted power supply with lack detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520298900.9U CN204720956U (en) 2015-05-11 2015-05-11 A kind of three-phase uninterrupted power supply with lack detection circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105486936A (en) * 2015-12-04 2016-04-13 易事特集团股份有限公司 Uninterrupted power source having null-line-absence detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105486936A (en) * 2015-12-04 2016-04-13 易事特集团股份有限公司 Uninterrupted power source having null-line-absence detection circuit
CN105486936B (en) * 2015-12-04 2019-06-14 易事特集团股份有限公司 Uninterruptible power supply with scarce zero curve detection circuit

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