CN106410955A - Uninterruptible power supply circuit used for gravity measurement - Google Patents
Uninterruptible power supply circuit used for gravity measurement Download PDFInfo
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- CN106410955A CN106410955A CN201610972891.6A CN201610972891A CN106410955A CN 106410955 A CN106410955 A CN 106410955A CN 201610972891 A CN201610972891 A CN 201610972891A CN 106410955 A CN106410955 A CN 106410955A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a power supply system management circuit used for gravity measurement, which comprises an AC input conversion module, a DC input conversion module, a battery module, a charging control module, a discharging control module, a switching control module and an output conversion module, wherein the charging control module selects one path, with higher voltage, of the AC input conversion module and the DC input conversion module as a charging power supply for charging the battery unit; when a voltage of the battery unit is higher than or equal to a threshold voltage, the voltage of the battery unit is output to the switching control module; and the switching control module selects one path, with the highest voltage, of the AC input conversion module, the DC input conversion module and the discharging control module as a charging power supply, and transmits the charging power supply to the output conversion module. The uninterruptible power supply circuit is provided with three power supply modules including alternating current, direct current and battery, adapts to the demands of various occasions, uses the alternating current and the direct current for charging the battery unit, and ensures the charging of the battery under different occasions.
Description
Technical field
The present invention relates to a kind of be used for gravimetric uninterrupted power supply circuit, belong to Power Management Design field.
Background technology
The accurate model of gravitational field can be applied in a lot of fields.In navigation field, resolution ratio is the whole world of 10～50km
Gravity field model can be used to improve the running track of aeronautical satellite, and the gravity field data that resolution ratio is 1～1Okm can improve
The navigation performance of inertial navigation system.In field of scientific study, terrestrial gravitation field data is applied not only to geodesic survey, geophysics, and
And it is widely used in geodynamics, geology and oceanographic research.It is 10～100km that Geophysicist needs resolution ratio, essence
Really to the mean gravity vector of 1～5mGal, for study of rocks coil structures, slow constitute, the phenomenon such as monitoring atmosphere warms.
It is 50～500km that thalassographer needs resolution ratio, be accurate to gravity field data O.1mGal, for studying sea surface topography etc..Stone
Oily physical prospecting then needs finer earth gravitational field information (resolution ratio is 1～1Okm, and precision is 0.5～1mGal).
Gravimetric data early stage is mainly the utilization in static field, expands to ocean and aviation with application, dynamically weighs
Power measurement is more and more important.Because the dynamic gravity measurement activity duration is long, there is very high requirement to the reliability of electric power system.High
The dynamic gravity measurement of precision is a kind of international and domestic advanced technology, and external equipment is many, and system complex, during operation
There is the situation of power-off.So needing a kind of power-supply device of integrated several functions, can work in normal conditions, also can tackle
The interruption of power supply.
For the switching mode between the different types of power supply used in gravity measurement, in the past using by the way of be with soft
The method of part controls the switching of every kind of power supply, and due to the time delay being switched by software deterministic process and device, switching time is not
The shortest.And the sampling to power supply is affected by the magnitude of voltage size of power supply, accurate judgement sometimes can not be made.Experiment card
Bright switching has certain error, needs relatively reliable circuit arrangement.
The power supply of generally uninterrupted power supply is exactly ups power.Common UPS is cutting between alternating current 220V and battery
Change, the charging of battery also relies on alternating current.Such UPS is not met by gravimetric needs, how to arrange a kind of symbol
Close the power supply of gravity measuring system demand, be this area technical problem urgently to be resolved hurrily.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, provide a kind of electric for gravimetric uninterrupted power source
Road, increased the function of UPS equipment, and integrated equipment size is less, and weight is lighter, is easy to field trial.
The object of the invention is achieved by following technical solution：
There is provided a kind of circuit for electric power system management, include exchange input modular converter, direct current input modular converter,
Battery unit, charge control module, control of discharge module, switching control module and output modular converter；
Described exchange inputs modular converter incoming transport electricity and sends to switching control module after being converted to direct current；
Described direct current input modular converter accesses direct current and sends to switching control module after carrying out pressure regulation；
Described charge control module detects the voltage at battery unit two ends, when voltage is less than charge threshold, selects described
In exchange input modular converter and direct current input modular converter, voltage charges for battery unit as charge power supply compared with Gao mono- tunnel；
Control of discharge module gathers the voltage at battery unit two ends, when this voltage is less than discharge threshold, controls battery list
Unit stops electric discharge, and when this voltage is greater than or equal to threshold value, output battery cell voltage is to described switching control module；
Described switching control module selects described exchange input modular converter, direct current input modular converter and control of discharge mould
In block three, output voltage highest, as a road as power supply, and power supply is sent to output modular converter；
Output modular converter by the Voltage Cortrol of power supply to required size and exports to load.
Preferably, described switching control module includes the first diode Z1, the second diode Z2, the 3rd diode Z3；The
The positive pole of one diode Z1 connects described exchange input modular converter, and the positive pole of the second diode Z2 connects described direct current input and turns
Die change block, the positive pole of the 3rd diode Z3 connects described control of discharge module；The negative pole of three diodes is connected, and connects output
Modular converter.
Preferably, also include breaking circuit, when charge control module is in as cell charging state, breaking circuit
Output cut-off signals (GATE2), the output of control of discharge module is turned off.
Preferably, also include float charge voltage adjustment circuit, the output voltage of battery unit is through resistance R37 and R42 partial pressure
Compare with reference voltage REF afterwards, if above reference voltage REF, then output low level is to described exchange input modular converter
Export adjustable side, reduce the output voltage of exchange input modular converter, and export low level to described direct current input modular converter
Output adjustable side, reduce the output voltage that described direct current inputs modular converter；If being less than reference voltage REF, output is high
Level, to the output adjustable side of described exchange input modular converter, raises the output voltage of exchange input modular converter, and exports
High level inputs the output adjustable side of modular converter to described direct current, raises the output voltage that described direct current inputs modular converter.
Preferably, charge threshold is 27.6V, and discharge threshold is 21.6V, and reference voltage REF is the fixed value setting.
The present invention compared with prior art has the advantage that：
(1) uninterrupted power supply circuit of the present invention, is provided with alternating current, direct current and three kinds of supply modules of battery simultaneously,
Adapt to the demand of multiple occasions.It is that battery unit charges it is ensured that under different occasion that the present invention utilizes alternating current and direct current, electric
The charging in pond is guaranteed.
(2) switching circuit of the present invention, simple and reliable it is achieved that the seamless switching of three modules, meeting load supplying will
Seek the continuity it is ensured that powering.
(3) present invention setting breaking circuit, reduces the operating time of battery, improves the service life of battery.
(4) present invention setting float charge voltage adjustment circuit, controls charging in turn by the output voltage of battery unit
Voltage it is ensured that charging voltage stable in suitable scope it is ensured that the security charged of battery.
Brief description
The general function block diagram of Fig. 1 present invention；
The exchange input modular converter circuit diagram of Fig. 2 present invention；
The exchange input modular converter circuit diagram of Fig. 3 present invention；
The switching circuit figure of Fig. 4 present invention；
The charge-discharge circuit figure of Fig. 5 present invention；
Fig. 6 breaking circuit of the present invention circuit diagram；
Fig. 7 float charge voltage of the present invention adjustment circuit circuit diagram.
Specific embodiment
(1) general function
This electric power system management circuit possesses exchange and two kinds of outer input interfaces of direct current, by user according to external condition
Select to connect one of input interface；Electric power system management circuit overall functional block is as shown in Figure 1.Gravimetric power supply system
The circuit of reason under the overall leadership, including exchange input modular converter ACDC, direct current input modular converter DCDC, battery unit, charge control
Module, control of discharge module, switching control module and output modular converter DCDC；Exchange input modular converter incoming transport electricity is simultaneously
Send to switching control module after being converted to direct current；Direct current input modular converter accesses direct current and sends out after carrying out DCDC pressure regulation
Deliver to switching control module；Charge control module detects the voltage at battery unit two ends, when voltage is less than charge threshold, selects
In described exchange input modular converter and direct current input modular converter, voltage is battery unit compared with Gao mono- tunnel as charge power supply
Charge；Control of discharge module gathers the voltage at battery unit two ends, when this voltage is less than discharge threshold, controls battery unit to stop
Only discharge, when this voltage is greater than or equal to threshold value, output battery cell voltage is to described switching control module；Described switching control
Molding block select described exchange input modular converter, direct current input modular converter and control of discharge module three in output voltage
High conduct one tunnel is as power supply, and power supply is sent to output modular converter；Output modular converter will be powered electricity
The Voltage Cortrol in source to required size and exports to load.
(2) conversion of power type
This electric power system manages the conversion that circuit realizes different voltage kinds by switch power module.The system selects
DCDC Switching Power Supply input voltage 18-36V, meets the direct current supply occasion of the overwhelming majority.The voltage generally exporting
Constant 28.5V, and during battery constant-voltage charge, charging voltage have to be larger than cell voltage.Normal cell near 28V voltage
Specification be 24V, just meet to the condition of battery constant-voltage charge.The shortcoming of Switching Power Supply is ripple and the noise voltage of output
Larger, generally output voltage 1% about.Battery charges does not need the voltage of high stable, is to have certain fluctuation right on the contrary
Electrolyte in activated batteries is benefited.But our Dynamic High-accuracy gravity measuring system then wishes that supply voltage is very pure
Only.Because Switching Power Supply itself is the integrated of power conversion part, so not being accompanied with efficient filtering circuit and other characteristic
Circuit, thus devise input and the filter circuit of output.
Incoming transport electricity in resistance R1 two ends in ACDC change-over circuit in Fig. 2；Resistance R1, R2, R10, R11, electric capacity CY3,
CY4, CX1, CX2, inductance LF2, LF3 collectively constitute the filtering of alternating current input power supplying；Triode Q4, resistance R22, R23, R24,
R27, R30, R31, R33, electric capacity C6, C7 constitute the enable control of module and the fine setting of output voltage.When battery is not fully charged
When, ADJA is high level, at this moment Q4 conducting, and R33 right-hand member is equivalent to and meets-VOA, connect with R27 after R33 and R22 parallel connection again, parallel connection
The control source at resistance two ends is to 8 pins of U2；When battery is full of, ADJA is low level, and Q4 turns off, R27 and R22 connects,
To 8 pins of U2, the voltage of 8 pins when battery does not have fully charged that now compares increases the control source at R22 two ends, U2
Output 11 pin voltage step-down；BASE connects metal shell by JP1；Resistance R19, R20 play the role of to compensate output voltage；Electricity
Hold the two poles of the earth that E9, E11, E12, C15 are connected in parallel on output voltage, play the role of filtering.
(3) regulation of voltage magnitude
This electric power system management circuit is also the regulation realizing DC voltage amplitude by switch power module.Carry
On aircraft or naval vessel, the scope of direct current supply input has uncertainty, often below or higher than the input range requiring, so
The DCDC of one-level first carries out first Power convert.Electric capacity C1, CY1, CY2, E1, E2, E3 in DC/DC converter circuit in Fig. 3,
Inductance LF1 collectively constitutes the filtering of direct-current input power supplying；Triode Q3, resistance R18, R25, R26, R29, R32, electric capacity C13 structure
The output voltage becoming module is adjusted；When battery does not have fully charged, ADJB is high level, at this moment Q3 conducting, and R32 right-hand member is equivalent to
Meet-VOB, the partial pressure after R32 and R29 parallel connection is input to 8 pins of U3；When battery is full of, ADJB is low level, and Q3 turns off,
To 8 pins of U3, the voltage of 8 pins when battery does not have fully charged that now compares increases the control source at R29 two ends, U3
Output 11 pin voltage step-down；BASE connects metal shell；Electric capacity E7, E8, E10 are equally the effects playing filtering.
(4) seamless switching
When outside input is powered (AC or DC) breaking moment, internal battery automatically provides electric energy；When outside is defeated
Enter for, during exchange, external communication input exports 28.5VDC through voltage conversion, battery is charged simultaneously；When outside input is
During direct current, external dc input also passes through voltage conversion output 28.5VDC, battery is charged simultaneously；Seamless switching is to adopt
The parallel connection of three road DC voltages realizing, i.e. the output of ACDC, the output of DCDC and cell parallel.This mode does not need to design
Complicated detection decision circuitry, merely add a DCDC module, purely realizes the automatic of power supply using the method for analog circuit
Switching, simple and reliable, feasible by actual verification.
Heating seamless switching circuit shown in Fig. 4 is to be realized using the parallel connection of three road DC voltages, and three-way power output is each
Series connection one diode Z1, Z2 and Z3, using the one-way conduction characteristic of diode, prevent several roads power supply from interacting.One or two
Pole pipe Z1, the second diode Z2, the 3rd diode Z3；The positive pole of the first diode Z1 connects described exchange input modular converter,
The positive pole of the second diode Z2 connects described direct current and inputs modular converter, and the positive pole of the 3rd diode Z3 connects described control of discharge
Module；The negative pole of three diodes is connected.Output capacitor COUT can be for providing energy in diode handoff procedure.According to electricity
The electric charge formula Q=CU holding, that is, charge Q be equal to the product of capacitance C and both end voltage U, and charge Q can be estimated by Q=It
Calculate, current value I is load current, here for 3.5A, the time delay that t switches for diode, here for 140ns, calculates C
=17.5nF.It can be seen that because the switching speed of diode is very soon it is only necessary to the output capacitance of very little just can meet interrupted midway
Gap, realize zero second switching.Used in reality, electric capacity is microfarad range, much larger than the electric capacity of nanofarad, fully meets zero second
The requirement of switching.This circuit situation that may be present has：Three roads power simultaneously, only two-way energising and only a-road-through is electric.Three
Plant in the case of powering, due to nominal cell voltage not more than 28.5V, three tunnels competitions, high-tension preferential work simultaneously
Make, then battery does not externally export electric energy, AC and DC two-way provides electric energy simultaneously.Outside offer exchanges or direct current one kind
During electric energy, if now battery access system, external power source also priority task, after external power source breaks, the diode connecing battery is opened
Open, continue to externally fed.In the case of only a kind of supply input, internal system only has Switching Power Supply in work, only serves
The function of Power convert.
(5) battery management measure
Battery management part includes electric power detection, charge control, control of discharge.Battery, as energy reserves, has discharge and recharge
The function of controlling.According to the battery electric quantity detecting, decision-making whether charge or discharge.Electric power detection is using survey battery both end voltage
The number to judge electricity for the mode.This electric power detection is affected by load current and resistance, has certain error, but this
Kind detection mode is simple, and real-time is good it is only necessary to little device just can complete.The charging of battery is filled using stage
Electricity strategy, when battery power shortage is serious, charging current is larger, and cell voltage rises to after certain numerical value charging voltage and electric current all
Reduce, eventually become floating charge mode.Control of discharge then sets an electrical voltage point, then cuts off battery less than this value, prevents excessively
Electric discharge impact battery.Management of charging and discharging：Charging process overcharges protection, and discharge process has Cross prevention (to cross and put guarantor
Shield point 21.6V)；
Battery charge-discharge circuit shown in Fig. 5 to be completed jointly by charging management chip U1, U2 and power MOS pipe Q1, Q2, letter
Single easy.Set cell voltage and be more than stopping charging during 28.5V, prevent charging satiety cell voltage to be less than stopping during 21.6V and put
Electricity.R3, R4 and R5 composition voltage sample end of charging circuit part, R6, R7 limit charging current, and U1 provides gate leve control
Signal makes Q1 open or cuts off；In the same manner, R13, R14, R15 composition voltage sample end, R16, R17 limit discharge current size,
Q2 controls whether battery discharges.
(6) breaking circuit
Gate pole GATE1 and GATE2 of Q1 and Q2 is also controlled by other logic circuits simultaneously.At charge control module
When for cell charging state, charging control signal (GATE1) is 1, breaking circuit output cut-off signals (GATE2), will
The output of control of discharge module turns off.During namely charging, battery does not externally discharge.The control logic that Fig. 6 is given makes
Must discharge and charge and there is contrary logic.
(7) float charge voltage adjustment circuit
With voltage comparator, battery both end voltage VOUT is compared with reference voltage REF in Fig. 7, if the partial pressure of VOUT is little
In reference voltage REF, then ADJA and ADJB is high level, if in turn VOUT partial pressure be more than reference voltage REF, ADJA and
ADJB is low level；ADJA and ADJB exports the control end of Q3 and Q4 in Fig. 3 and Fig. 2, when battery substantially Full Charge Capacity,
Q3 and Q4 turns off so that the output voltage of U2 and U3 diminishes, and battery charges and is changed into floating charge.
(8) safety measure：Ups power device is also devised with output overvoltage, excessively stream, short circuit, overtemperature protection, these circuit pair
Main body circuit function does not affect, and works, as safety precautions under some abnormal conditions.
It is then to make temperature sensor using temperature switch that excess temperature controls, and is attached on battery case, judges whether battery is overheated,
Charge control module and control of discharge module is just controlled to cut off the discharge and recharge of battery once the temperature upper limit reaching setting.
(9) miscellaneous function：Miscellaneous function includes manually-operated switch port switching and the end of battery electric quantity display in real time
Mouthful.LCD display output electric current, indicator lamp indicating operating status, instruction content includes：Whether external communication input works, outside
Whether direct current input works, battery current electric quantity (4 green lights are all bright to represent full lattice, 3 all bright expression dump energies 75%,
The rest may be inferred), battery whether output services.Battery electric quantity instruction is then to be compared with reference voltage with the voltage detecting, high
In standard value then corresponding indicator lamp amount.Battery capacity indication lamp has four, and voltage comparator is also four.
Due to small volume, effective area of dissipation is little, and local pyrexia is many, the life-span of impact Switching Power Supply, therefore will especially consider
Exchange input modular converter and the heat dissipation design of direct current input modular converter.Here the method adopting is by exchange input modulus of conversion
Block and direct current input modular converter are arranged on radiating on big metallic plate, and metallic plate is contacted with shell, and heat is directed to equipment
Outside, is provided with fan on shell simultaneously, reduces further after working long hours or in the higher environment of environment temperature
The concentration of heat.
The circuit of the present invention gravimetric electric power system management, enters also integrated for DC power supply, dc source
Also can charge the battery simultaneously.Excellent integrated technology decreases the quantity of ancillary equipment, greatly reduces peripheral gravity and surveys
The volume and weight of amount system.
The above, the only optimal specific embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
All should be included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (5)
1. a kind of for gravimetric electric power system management circuit it is characterised in that：Including exchange input modular converter, directly
Stream input modular converter, battery unit, charge control module, control of discharge module, switching control module and output modular converter；
Described exchange inputs modular converter incoming transport electricity and sends to switching control module after being converted to direct current；
Described direct current input modular converter accesses direct current and sends to switching control module after carrying out pressure regulation；
Described charge control module detects the voltage at battery unit two ends, when voltage is less than charge threshold, selects described exchange
In input modular converter and direct current input modular converter, voltage charges for battery unit as charge power supply compared with Gao mono- tunnel；
Control of discharge module gathers the voltage at battery unit two ends, when this voltage is less than discharge threshold, controls battery unit to stop
Only discharge, when this voltage is greater than or equal to threshold value, output battery cell voltage is to described switching control module；
Described switching control module selects described exchange input modular converter, direct current input modular converter and control of discharge module three
In person, output voltage highest, as a road as power supply, and power supply is sent to output modular converter；
Output modular converter by the Voltage Cortrol of power supply to required size and exports to load.
2. electric power system according to claim 1 management circuit it is characterised in that：Described switching control module includes
One diode Z1, the second diode Z2, the 3rd diode Z3；The positive pole of the first diode Z1 connects described exchange input modulus of conversion
Block, the positive pole of the second diode Z2 connects described direct current and inputs modular converter, and the positive pole of the 3rd diode Z3 connects described electric discharge
Control module；The negative pole of three diodes is connected, and connects output modular converter.
3. electric power system according to claim 1 management circuit it is characterised in that：Also include breaking circuit, work as charging
When control module is in as cell charging state, breaking circuit output cut-off signals (GATE2), by control of discharge module
Output turns off.
4. electric power system according to claim 1 management circuit it is characterised in that：Also include float charge voltage adjustment electricity
Road, the output voltage of battery unit is compared with reference voltage REF, if above reference voltage after resistance R37 and R42 partial pressure
REF, then output low level is to the described output adjustable side exchanging input modular converter, the output of reduction exchange input modular converter
Voltage, and export the output adjustable side that low level inputs modular converter to described direct current, reduce described direct current and input modular converter
Output voltage；If being less than reference voltage REF, output high level is adjusted to the output of described exchange input modular converter
End, the output voltage of rising exchange input modular converter, and export the output tune that high level to described direct current inputs modular converter
Section end, raises the output voltage that described direct current inputs modular converter.
5. electric power system according to claim 1 management circuit it is characterised in that：Charge threshold is 27.6V, and discharge threshold
It is worth for 21.6V, reference voltage REF is the fixed value setting.
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| CN201610972891.6A CN106410955B (en) | 2016-10-28 | 2016-10-28 | One kind being used for gravimetric uninterrupted power supply circuit |
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| CN201610972891.6A CN106410955B (en) | 2016-10-28 | 2016-10-28 | One kind being used for gravimetric uninterrupted power supply circuit |
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