CN106410747A - Uninterrupted power supply (UPS) input protection circuit and UPS - Google Patents
Uninterrupted power supply (UPS) input protection circuit and UPS Download PDFInfo
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- CN106410747A CN106410747A CN201510448884.1A CN201510448884A CN106410747A CN 106410747 A CN106410747 A CN 106410747A CN 201510448884 A CN201510448884 A CN 201510448884A CN 106410747 A CN106410747 A CN 106410747A
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Abstract
A UPS input protection circuit relates to the UPS protection technology field, and comprises a high-voltage detection module, a low-voltage detection module and a switch module used for controlling the on-off of a power supply circuit through which a commercial power supplies power to a main circuit of the UPS. The high-voltage detection module detects the voltage of the commercial power, and when the voltage of the commercial power is higher than a first preset voltage, outputs a high-voltage trigger signal to the switch module to trigger the switch module to cut off the power supply circuit, and the low-voltage detection module detects the voltage of the commercial power, and when the voltage of the commercial power is lower than a second preset voltage, outputs a low-voltage trigger signal to trigger the switch module to cut off the power supply circuit. The high-voltage detection module detects whether the voltage of the commercial power is overhigh, the low-voltage detection module detects whether the voltage of the commercial power is overlow, and when the voltage of the commercial power overhigh or overlow, the high-voltage detection module or the low-voltage detection module triggers the switch module to cut off the power supply circuit, thereby preventing the situation that the main circuit of the UPS goes wrong due to the overhigh or overlow voltage of the commercial power.
Description
Technical field
The invention is related to UPS resist technology field and in particular to a kind of UPS input protection circuit.
Background technology
UPS（Uninterruptable Power Supply, uninterrupted power source）It is a kind of containing batteries to store energy device, the power protective equipment with inverter as formant.The main circuit of UPS is mainly made up of inverter and accumulator, and when civil power input is normal, civil power is just transformed to stable alternating voltage by rectification, inverter circuit and uses for load by UPS, completes the charging to accumulator simultaneously；When civil power is abnormal, the energy storing in accumulator is just converted to the alternating current powering load of constant voltage, constant frequency by UPS by DC boosting, inverter circuit.And when overload, the abnormal phenomena such as excess temperature in UPS, the outfan of UPS will be switched to bypass outfan from inverting output terminal by UPS, by bypassing powering load, so that it is guaranteed that the outfan not power down of UPS.
Many UPS are provided with protection circuit, such as overvoltage crowbar, current foldback circuit etc. in its main circuit, be not damaged by with protection UPS when main circuit breaks down, and proof load will not power down.However, the line voltage of input UPS is too high or too low being likely to make the main circuit of UPS break down, so that load power down.
Content of the invention
The above-mentioned technical problem existing for prior art; the invention provides a kind of UPS input protection circuit and UPS; it can cut off the supply line that civil power is powered to the main circuit of UPS when line voltage is too high or too low, thus preventing the too high or too low main circuit leading to UPS of line voltage from breaking down.
For achieving the above object, the invention provides technical scheme below.
UPS input protection circuit; switch module including high pressure detection module, low pressure detection module and the break-make being used for from the supply line controlling civil power to power to the main circuit of UPS; high pressure detection module detection line voltage simultaneously touches output high-voltage trigger signal with the described supply line of trigger switch module cut-out when line voltage is higher than the first predeterminated voltage to switch module, and low pressure detection module detection line voltage simultaneously touches output low pressure trigger with the described supply line of trigger switch module cut-out when line voltage is less than the second predeterminated voltage to switch module.This is technical scheme 1.
UPS input protection circuit according to technical scheme 1; high pressure detection module includes amplifier U1; amplifier U1 in-phase input end is transfused to civil power; inverting input is transfused to first reference voltage corresponding with the first predeterminated voltage; outfan exports high-voltage trigger signal to switch module, and low pressure detection module includes amplifier U2, and amplifier U2 in-phase input end is transfused to second reference voltage corresponding with the second predeterminated voltage; inverting input is transfused to civil power, and outfan exports low pressure trigger to switch module.This is technical scheme 2.
The input protection circuit of UPS according to technical scheme 2, high pressure detection module includes the first bleeder circuit for providing the first reference voltage, first bleeder circuit includes at least two divider resistances, it is connected between power supply and ground after the series connection of this at least two divider resistance, in this at least two divider resistance, at least one is adjustable resistance, low pressure detection module includes the second bleeder circuit for providing the second reference voltage, second bleeder circuit includes at least two divider resistances, it is connected between power supply and ground after the series connection of this at least two divider resistance, in this at least two divider resistance, at least one is adjustable resistance.This is technical scheme 3.
UPS input protection circuit according to technical scheme 1; also include civil power sampling module; its sampling civil power is simultaneously conveyed to high pressure detection module and low pressure detection module; so that whether high pressure detection module detection line voltage is higher than the first predeterminated voltage, whether it is less than the second predeterminated voltage for low pressure detection module detection line voltage.This is technical scheme 4.
UPS input protection circuit according to technical scheme 4; civil power sampling module includes divider resistance R1, divider resistance R2 and commutation diode D1; divider resistance R1 mono- terminates civil power; the other end connects commutation diode D1 positive pole; divider resistance R2 one end connects commutation diode D1 negative pole; the other end is grounded, and the negative pole of commutation diode D1 connects high pressure detection module and low pressure detection module.This is technical scheme 5.
UPS input protection circuit according to technical scheme 1, switch module includes and gate circuit, switching tube Q1 and relay JQ1, include diode D2 with gate circuit, diode D3 and amplifier U3, diode D2 positive pole receives high-voltage trigger signal, negative pole connects the in-phase input end of amplifier U3, diode D3 positive pole receives low pressure trigger, negative pole connects the in-phase input end of amplifier U3, amplifier U3 inverting input is transfused to the 3rd reference voltage, the control end of outfan connecting valve pipe Q1, two controlled conduction terminal of switching tube Q1 are connected between power supply and ground after being connected with the coil of relay JQ1, the normally-closed contact of relay JQ1 is serially connected with described supply line.This is technical scheme 6.
UPS input protection circuit according to technical scheme 1, also includes the power module for the other module for power supply to described protection circuit, and power module includes commutator and manostat, and rectifier input connects civil power, and outfan connects the input of manostat.This is technical scheme 7.
UPS, including main circuit, also includes the UPS input protection circuit described in any one of technical scheme 1-7.
The beneficial effect of the invention is：The UPS input protection circuit of the invention is provided with switch module; the break-make of the supply line that its control civil power is powered to the main circuit of UPS; it is additionally provided with high pressure detection module and low pressure detection module; whether high pressure detection module detection line voltage is too high; whether low pressure detection module detection line voltage is too low; when line voltage is too high or too low; high pressure detection module or low pressure detection module trigger switch module will cut off described supply line, thus preventing the too high or too low main circuit leading to UPS of line voltage from breaking down.Circuit structure is simple, easily realizes, low cost.The UPS with described input protection circuit being capable of self-protection in input.
Brief description
Fig. 1 is the schematic diagram of the UPS input protection circuit of the invention.
Reference includes：Civil power sampling module 1, high pressure detection module 2, low pressure detection module 3, switch module 4.
Specific embodiment
Below in conjunction with specific embodiment, the invention is elaborated.
The UPS of the present embodiment includes main circuit and UPS input protection circuit; Fig. 1 show UPS input protection circuit; L is civil power live wire; N is civil power zero line; power module includes commutator and manostat, and the civil power of input power module is carried out rectification by commutator, and manostat is carrying out voltage stabilizing; the stable VCC power supply of power module output and VDD power supply, are other module for power supply of described input protection circuit.
As shown in Figure 1, resistance R1, R2, R11, electric capacity C1 and diode D1 constitute civil power sampling module 1, electric capacity C1 carries out blood pressure lowering to civil power, and discharge in civil power negative half period persistently to provide voltage, resistance R11 is the bleeder resistance of electric capacity C1, resistance R1 and R2 carries out partial pressure to civil power, and diode D1 carries out rectification to civil power, and the civil power after partial pressure is conveyed to high pressure detection module 2 and low pressure detection module 3 by the contact between diode D1 and resistance R2.High pressure detection module 2 includes amplifier U1, resistance R3 and R4, it is connected between power supply VCC and ground after resistance R3 and R4 series connection, form the first bleeder circuit, low pressure detection module 3 includes amplifier U2, resistance R5 and R6, it is connected between power supply VCC and ground after resistance R5 and R6 series connection, form the second bleeder circuit.In the present embodiment, set normal range of line voltage as 160V-280V, therefore the first predeterminated voltage is 280V, second predeterminated voltage is 160V, according to the partial pressure situation to line voltage for resistance R1 and R2, the resistance of resistance R3 and R4 is set, thus partial pressure obtains first reference voltage corresponding with 280V, the resistance of setting resistance R5 and R6, thus partial pressure obtains second reference voltage corresponding with 160V.Further, resistance R4, R6 is adjustable resistance, thus by the resistance adjusting resistance R4 and R6, to adjust the first reference voltage and the second reference voltage, thus adjusting the first predeterminated voltage and the second predeterminated voltage.Diode D2, D3 and amplifier U3, and resistance R7-R9, electric capacity C2 composition and gate circuit, together form switch module 4 with gate circuit with audion Q1, diode D4 and relay JQ1, and audion Q1 is NPN type triode.
If line voltage is higher than 280V, through resistance R1, the voltage being input to the in-phase input end of amplifier U1 after R2 partial pressure will be higher than through resistance R3, the first reference voltage is obtained after R4 partial pressure, that is, now the level of amplifier U1 in-phase input end is higher than the level of inverting input, therefore the outfan of amplifier U1 output high level, diode D2 turns on, the in-phase input end of amplifier U3 is transfused to high level, therefore the outfan of amplifier U3 output high level, audion Q1 thus turns on, the coil of relay JQ1 has electric current to flow through, the normally-closed contact of relay JQ1 is disconnected, the INPUT end therefore power-off powered to the main circuit of UPS, supply line that civil power is powered to the main circuit of UPS is thus cut-off.
If line voltage is less than 160V, through resistance R1, the voltage being input to the inverting input of amplifier U2 after R2 partial pressure will be less than through resistance R5, the second reference voltage is obtained after R6 partial pressure, that is, now the level of amplifier U2 inverting input is less than the level of in-phase input end, therefore the outfan of amplifier U2 output high level, diode D2 turns on, the in-phase input end of amplifier U3 is transfused to high level, therefore the outfan of amplifier U3 output high level, audion Q1 thus turns on, the coil of relay JQ1 has electric current to flow through, the normally-closed contact of relay JQ1 is disconnected, the INPUT end therefore power-off powered to the main circuit of UPS, supply line that civil power is powered to the main circuit of UPS is thus cut-off.
If line voltage is in the range of 160V-280V, the level of amplifier U1 in-phase input end is less than the level of inverting input, the outfan output low level of amplifier U1, diode D2 ends, and the level of amplifier U2 inverting input is higher than the level of in-phase input end, the outfan output low level of amplifier U2, diode D3 ends, the outfan output low level of amplifier U3, and audion Q1 ends, obtain electric to the INPUT end that the main circuit of UPS is powered, the supply line that civil power is powered to the main circuit of UPS is normal.
Finally it should be noted that; above example is only in order to illustrate the technical scheme of the invention; rather than the restriction to the invention protection domain; although having made to explain to the invention with reference to preferred embodiment; it will be understood by those within the art that; the technical scheme of the invention can be modified or equivalent, without deviating from the spirit and scope of the invention technical scheme.
Claims (8)
1.UPS input protection circuit; it is characterized in that; switch module including high pressure detection module, low pressure detection module and the break-make being used for from the supply line controlling civil power to power to the main circuit of UPS; high pressure detection module detection line voltage simultaneously touches output high-voltage trigger signal with the described supply line of trigger switch module cut-out when line voltage is higher than the first predeterminated voltage to switch module, and low pressure detection module detection line voltage simultaneously touches output low pressure trigger with the described supply line of trigger switch module cut-out when line voltage is less than the second predeterminated voltage to switch module.
2. UPS input protection circuit according to claim 1; it is characterized in that; high pressure detection module includes amplifier U1; amplifier U1 in-phase input end is transfused to civil power; inverting input is transfused to first reference voltage corresponding with the first predeterminated voltage; outfan exports high-voltage trigger signal to switch module; low pressure detection module includes amplifier U2; amplifier U2 in-phase input end is transfused to second reference voltage corresponding with the second predeterminated voltage; inverting input is transfused to civil power, and outfan exports low pressure trigger to switch module.
3. the input protection circuit of UPS according to claim 2, it is characterized in that, high pressure detection module includes the first bleeder circuit for providing the first reference voltage, first bleeder circuit includes at least two divider resistances, it is connected between power supply and ground after the series connection of this at least two divider resistance, in this at least two divider resistance, at least one is adjustable resistance, low pressure detection module includes the second bleeder circuit for providing the second reference voltage, second bleeder circuit includes at least two divider resistances, it is connected between power supply and ground after the series connection of this at least two divider resistance, in this at least two divider resistance, at least one is adjustable resistance.
4. UPS input protection circuit according to claim 1; it is characterized in that; also include civil power sampling module; its sampling civil power is simultaneously conveyed to high pressure detection module and low pressure detection module; so that whether high pressure detection module detection line voltage is higher than the first predeterminated voltage, whether it is less than the second predeterminated voltage for low pressure detection module detection line voltage.
5. UPS input protection circuit according to claim 4; it is characterized in that; civil power sampling module includes divider resistance R1, divider resistance R2 and commutation diode D1; divider resistance R1 mono- terminates civil power; the other end connects commutation diode D1 positive pole; divider resistance R2 one end connects commutation diode D1 negative pole, and the other end is grounded, and the negative pole of commutation diode D1 connects high pressure detection module and low pressure detection module.
6. UPS input protection circuit according to claim 1, it is characterized in that, switch module includes and gate circuit, switching tube Q1 and relay JQ1, include diode D2 with gate circuit, diode D3 and amplifier U3, diode D2 positive pole receives high-voltage trigger signal, negative pole connects the in-phase input end of amplifier U3, diode D3 positive pole receives low pressure trigger, negative pole connects the in-phase input end of amplifier U3, amplifier U3 inverting input is transfused to the 3rd reference voltage, the control end of outfan connecting valve pipe Q1, two controlled conduction terminal of switching tube Q1 are connected between power supply and ground after being connected with the coil of relay JQ1, the normally-closed contact of relay JQ1 is serially connected with described supply line.
7. UPS input protection circuit according to claim 1; it is characterized in that, also include the power module for the other module for power supply to described protection circuit, power module includes commutator and manostat; rectifier input connects civil power, and outfan connects the input of manostat.
8.UPS, including main circuit, is characterized in that, also includes the UPS input protection circuit described in any one of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448884.1A CN106410747A (en) | 2015-07-28 | 2015-07-28 | Uninterrupted power supply (UPS) input protection circuit and UPS |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448884.1A CN106410747A (en) | 2015-07-28 | 2015-07-28 | Uninterrupted power supply (UPS) input protection circuit and UPS |
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| CN106410747A true CN106410747A (en) | 2017-02-15 |
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| CN201510448884.1A Pending CN106410747A (en) | 2015-07-28 | 2015-07-28 | Uninterrupted power supply (UPS) input protection circuit and UPS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108566160A (en) * | 2018-05-31 | 2018-09-21 | 苏州同泰新能源科技有限公司 | Intelligent wiring box with multichannel power management module |
| CN110618725A (en) * | 2018-06-20 | 2019-12-27 | Zkw集团有限责任公司 | Circuit arrangement for generating a regulated supply low voltage |
| CN110707807A (en) * | 2019-10-28 | 2020-01-17 | 樊氏科技发展有限公司 | Safety and stable discharge circuit for UPS |
| CN112071698A (en) * | 2020-07-31 | 2020-12-11 | 科华恒盛股份有限公司 | Control circuit for preventing error suction of relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108566160A (en) * | 2018-05-31 | 2018-09-21 | 苏州同泰新能源科技有限公司 | Intelligent wiring box with multichannel power management module |
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| CN110618725A (en) * | 2018-06-20 | 2019-12-27 | Zkw集团有限责任公司 | Circuit arrangement for generating a regulated supply low voltage |
| CN110707807A (en) * | 2019-10-28 | 2020-01-17 | 樊氏科技发展有限公司 | Safety and stable discharge circuit for UPS |
| CN112071698A (en) * | 2020-07-31 | 2020-12-11 | 科华恒盛股份有限公司 | Control circuit for preventing error suction of relay |
| CN112071698B (en) * | 2020-07-31 | 2023-06-20 | 科华数据股份有限公司 | Control circuit for preventing relay from being attracted by mistake |
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Application publication date: 20170215 |
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