CN209571963U - A kind of uninterruptible power supply rectification circuit of wide input range - Google Patents
A kind of uninterruptible power supply rectification circuit of wide input range Download PDFInfo
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- CN209571963U CN209571963U CN201822186174.8U CN201822186174U CN209571963U CN 209571963 U CN209571963 U CN 209571963U CN 201822186174 U CN201822186174 U CN 201822186174U CN 209571963 U CN209571963 U CN 209571963U
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Abstract
The utility model discloses a kind of uninterruptible power supply rectification circuits of wide input range, the rectification circuit includes controlled rectification full-bridge, controller and the filter capacitor that controlled variable changes conducting situation, two input terminals of controllable rectifier bridge are connect with the zero curve of single phase poaer supply and firewire respectively, two output ends of controllable rectifier bridge are connect with the both ends of filter capacitor respectively, and controller is connect with the control electrode of controlled rectification full-bridge.Compared with the prior art, the uncontrollable full-bridge in the prior art being constituted by a diode is changed to controlled rectification full-bridge by rectification circuit provided by the utility model, control using controller to controlled rectification full-bridge, whole circuit is changed to the tolerance of mains input voltage, the input transformer being arranged to cast off the reliability for predominantly guaranteeing circuit in former rectification circuit once and for all, entire simple circuit is practical reliable, is applicable in the uninterruptible power supply working environment of wider alternating current input range.
Description
Technical field
The utility model belongs to uninterruptible power supply manufacturing field, in particular to a kind of uninterruptible power supply of wide input range is whole
Current circuit.
Background technique
Uninterruptible power supply, i.e. UPS (Uninterruptible Power System/Uninterruptible Power
Supply), it is transformation twice by rectification circuit and inverter circuit, common mains power converter is become into high standard
AC power, and the battery by repeating accumulation of energy is connected with inverter circuit, with when realizing commercial power interruption continuously not
Interruptedly supplying power provides stable, good electricity for computer, computer network system, data center or other high-end electronic devices
Power supply and continuous continual power supply ensure, have had been more and more widely used in many industries.
The double conversion UPS of existing power frequency have structure simple, and performance is stablized, high reliability, system it is basic
Topological structure is as shown in Figure 1；The basic functional principle of the double conversion UPS of existing power frequency are as follows: when line voltage is normal, exchange city
Electricity provides direct current measurement via rectifier rectification, for inverter, and direct current measurement again inversion is become good through inverter
It is exported after alternating current；Alternating current is inputted in normal voltage range, and alternating current inputs charged device and charges to battery, guarantees battery
In save enough electricity；When mains failure or brownout, alternating current is inputted can not be after via the direct current measurement of rectifier rectification
The continuous normal inversion output for maintaining inverter, the direct current measurement of battery group storage at this time will be automatically performed connectings (partially or
All take over commercial power rectification electricity), uninterrupted direct current measurement is provided for inverter, guarantees inverter in city's Electrical change
Load equipment is remained in the process, and high-quality exchange electricity output is provided.
Common rectification circuit be divided into can not control rectifying circuit and controlled rectification circuit, wherein uncontrollable type rectification circuit is adopted
Use diode as rectifying device, there is simple, practical, stable electric circuit characteristic, and controlled rectification circuit then use it is silicon-controlled
Deng be used as rectifying device, realize rectify purpose while, moreover it is possible to achieve the purpose that rectified voltage pressure stabilizing export.In rectified current
In the practical application on road, single-phase rectifier generallys use uncontrollable rectifier system, and three phase rectifier then relatively mostly uses controlled rectification mode,
And single-phase rectifier does not use the main reason for controlled rectification to be that, even if using single-phase controlled rectification mode, the direct current of output is steady
Constant voltage value is relatively low, is difficult to meet actual needs, does not have practicability.
It is single-phase defeated in the input rectifying technology of the double conversion UPS of existing power frequency for the rectifier in ups system
The rectification circuit for entering type UPS also generallys use the uncontrollable rectifier system of diode full-bridge rectification, if Fig. 2 is existing single-phase input
Rectification circuit in type ups system；It include an input transformer T1 in the rectification circuit, one group by four diodes
(D1/D2/D3/D4) rectifier bridge and a filter capacitor C1 formed；Technical staff is by selecting input transformer T1 appropriate
Transformation ratio, the rectification circuit work when, alternating current input by input voltage amplitude be Ua electric main, pass through input transformer
T1 is adjusted to the alternating current of amplitude Ub, to meet scope of application requirement of the UPS to rectifier input voltage；And four two poles
The rectifier bridge of pipe D1/D2/D3/D4 composition is then used to for the convert alternating current that voltage magnitude is Ub being not higher than as voltage peak
The Rectified alternating current of 1.4142*Ub, and after the smoothing effect of filter capacitor C1, an amplitude, which is provided, for inverter is not higher than
DC bus (DCBUS) electricity of 1.414*Ub.
By four diodes form full-bridge can not control rectifying circuit be applied in actual ups system, circuit theory
Block diagram such as Fig. 3, in practical ups system, the most common battery series connection for being configured to 16 section 12V of battery group BAT, it is general come
It says, the power device routine stress levels on four rectifier diodes and inverter are 600V, and the pressure resistance of filter capacitor C1
It is horizontal that grade is usually chosen in conventional 400Vdc, it is contemplated that there are high pressure spike in inverter high-frequency work, therefore inverter
The reality of power device is applicable in direct-current working volts and also there was only 2/3rds of 600V, that is, the level of 400Vdc, thus right
The rectifier input voltage Ub limit range answered is about at 168~282Vac (220Vac-23%~+220Vac28%).This is
Because then battery group starts to discharge, and city's electric flux cannot continue to mention when being lower than 168Vac (220Vac-23%) such as input voltage
Inverter is supplied to use；As input voltage is higher than 282Vac (220Vac+28%), it is likely that cause the power device on inverter
The damage of part and filter capacitor C1 seriously affects the reliability of product.Stress levels as improved the device being related to comprehensively, then
The stress levels of the circuit unconventional higher level can be increased to, but the cost of product will be so increased substantially
With buying difficulty.
For considering for the reliability factor to product, in practical applications, technical staff is usually in setting input voltage
Upper limit value when at least to reserve 5% surplus on the basis of limiting value, i.e., we actual product design in considered it is whole
Stream device input voltage Ub design application range should be selected at 168~268Vac (220Vac-23%~220Vac+22%).
In ups system, the effect of setting input transformer T1 be can window to rectifier input voltage range into
Row is certain to be moved up and down.
We are with the design scheme that above-mentioned battery group BAT conventional arrangement is the 16 concatenated ups systems of section 12V battery
Example:
If selecting input transformer for the transformation ratio of decompression 10%, input AC line voltage Ua is by input transformation
Device T1 is re-used as the input voltage Ub of rectifier after downgrading 10%, then, for the voltage range of rectifier input voltage Ub
168~268Vac (220Vac-23%+22%), the range for corresponding to line voltage Ua can promote correspondingly to 187~
298Vac (220Vac-15%+35%).
, whereas if selecting input transformer for the transformation ratio of boosting 10%, then input AC line voltage Ua is by defeated
Enter the input voltage Ub that rectifier is re-used as after transformer T1 increases 10%, then, for the electricity of rectifier input voltage Ub
It presses 168~268Vac of range (220Vac-23%+22%), the range for corresponding to line voltage Ua can accordingly decrease
153~244Vac (220Vac-30%+11%).
Obviously, by after above-mentioned input transformer T1 modulation, can uni-directionally adjust the alternating current input upper limit or
Lower limit, but widening for bound cannot be combined.Therefore, higher or steadily in the long term relatively low ground steady in a long-term for alternating current
Area can meet requirement using the method that input transformer T1 is increased or downgraded in right amount, and long-term for line voltage
Stablize normal area, then the effect of input transformer is little.But for the very unstable area of line voltage, (voltage is high
When it is very high, it is very low when low), original technology is unable to satisfy actual operation requirements.
Such as a kind of single-phase bridge is disclosed in the patent application document that number of patent application is " 201210225769.4 "
Current rectifying and wave filtering circuit, including sequentially connected transformer T, rectification circuit and load RL, it is defeated that the two of transformer T are terminated with signal
Entering to hold Vin and signal output end Vo, rectification circuit is single-phase bridge rectifier, and single-phase bridge rectifier includes 4 diodes, point
It is not D1, D2, D3, D4, the input terminal of diode D1 is connect with the input terminal of diode D2, the output end of diode D1 and two poles
The input terminal of pipe D3 connects, and the output end of diode D2 is connect with the input terminal of diode D4, the output end of diode D3 and two
The output end of pole pipe D4 connects, and the both ends for loading RL are parallel with capacitor C.Circuit disclosed in the patent application is typical application
Bridge rectifier filter circuit in single-phase rectifier, which, which adjusts input voltage using input transformer, wants its satisfaction use
It asks, rectifying part is rectified using the method for uncontrollable type full-bridge rectification, it is clear that a side from the circuit
Face, single phase rectifier circuit generally use uncontrollable type rectifier system, on the other hand, using the full-bridge rectification of uncontrollable type to single-phase
When circuit is rectified, input transformer still plays the role of vital adjustment input voltage in circuit, can not incite somebody to action
It is extractd from circuit.
And underground mine use flame proof is disclosed in the patent application document that number of patent application is " 201721327175.9 "
Type uninterruptible power supply case, the power supply box are made of explosion-proof UPS mainframe box (1) and anti-explosion battery box (2).The explosion-proof UPS host
Case (1) includes UPS host (3), input transformer (4), output transformer (5) and battery management system (6), the anti-explosion battery
Case (2) includes mining lithium-ions battery (7).The underground mine use flame-proof type uninterruptible power supply box structure is simple, reliable operation,
It can guarantee and effectively provide the power supply of high quality for important equipment, meet the needs of mine safety production and security monitoring.The reality
It is used for underground coal mine with the uninterruptible power supply of novel offer, to be solved to be the special 127Vac of coal mine electric supply system
It is suitable for the voltage transfer problem of common 220Vac input voltage system ups system with 660Vac voltage.We are practical new from this
As can be seen that equally adjusting the bound of input voltage in the uninterruptible power supply using input transformer in type, based on above
Analysis as a result, such input voltage regulation mode does not solve its mains ripple declared in practical applications
Larger problem cannot reach the high reliability request of coal mine special type uninterruptible power supply.In product actual use, input alternating current electricity
Press the situation of extremely unstable and remote super prescribed limit relatively common, it is especially regional in economically underdeveloped area or shortage of electric power,
Or nearby there is the region of the regular on/off operation of large-scale electric equipment, it is more common that alternating current inputs unstable situation, this
The selection and use condition for not only significantly limiting UPS, also greatly increase UPS product makes in the severe area of this kind of alternating current
Use failure rate.
Summary of the invention
To solve the above problems, the setting that the purpose of this utility model is to provide a kind of by changing rectifier bridge will be thus will
The uninterruptible power supply rectification circuit for the wide input range that input transformer is extractd from rectification circuit.
Another of the utility model is designed to provide a kind of uninterruptible power supply rectification circuit of wide input range, the electricity
Line structure is simple, easy to control, and strong applicability, manufacturing cost is low, easy to accomplish.
To achieve the above object, the technical solution of the utility model is as follows:
The utility model provides a kind of uninterruptible power supply rectification circuit of wide input range, which includes controlled
Controlled rectification full-bridge, controller and the filter capacitor of convertible conducting situation, two input terminals of controllable rectifier bridge respectively with it is single-phase
The zero curve of power supply is connected with firewire, and two output ends of controllable rectifier bridge are connect with the both ends of filter capacitor respectively, controller with can
Control the control electrode connection of rectifying full bridge.
When rectification circuit practical application provided by the utility model is in ups system, alternating current input is direct without transformer
Controlled rectification full-bridge is inputted, its conduction status can be changed in controlled rectification full-bridge under the control of the controller, to alternating current input into
After row rectification, exported after the smoothing effect of filter capacitor.
It is emphasized that the controller referred in the present invention is the prior art, which rises in circuit
The effect of relevant parameter into real-time detection and control circuit, under the control of the controller, the bridge arm of controlled rectification full-bridge is led
Logical situation changes at any time.In practical application, technical staff can need to be detected according to circuit and the parameter requirements controlled voluntarily select
The specific setting of controller.Controlled rectification full-bridge includes controlled member, controlled member be it is silicon-controlled, the quantity of controlled member is
Four or two.
The controlled rectification full-bridge of four controlled members includes that full control first is silicon-controlled, full control second is silicon-controlled, controls the entirely
Three silicon-controlled and full controls the 4th are silicon-controlled；The first silicon-controlled anode of full control anode silicon-controlled with full control third is connect, complete to control
First silicon-controlled cathode is connect with the second silicon-controlled anode of full control, and the silicon-controlled cathode of full control second and full control the 4th are controllable
The cathode of silicon connects, and complete the 4th silicon-controlled anode cathode silicon-controlled with the full control third of controlling is connect；The fire of input voltage
Line and full control first are silicon-controlled and the second silicon-controlled common end of complete control is connect, the zero curve of input voltage and to control third entirely silicon-controlled
It is connected with the 4th silicon-controlled common end of full control；The anode of filter capacitor and the silicon-controlled and full control the 4th of full control second are silicon-controlled
Common end connection, the negative terminal of the filter capacitor common end silicon-controlled with the silicon-controlled and full control third of full control first are connect；Full control the
The silicon-controlled control electrode of one silicon-controlled control electrode, the second silicon-controlled control electrode of full control, full control third, full control the 4th are silicon-controlled
Control electrode connect with controller.
Rectification circuit provided by the utility model is applied in actual uninterruptible power system, such as sets controllable rectifier bridge
It is set to the full-control type controlled rectification circuit form that four bridge arms are built by controlled device, we are still conventional with battery group BAT
Be set as the design scheme of the 16 concatenated ups systems of section 12V battery: four silicon-controlled composed pressure limiting rectifier bridges exist
Under the control of controller, input AC alternating current is transformed to Rectified alternating current, and after the smoothing effect of filter capacitor, after being
Continuous circuit provides direct current electricity output.Controller carries out real-time monitoring to the voltage of input alternating current.
When controller detects that input line voltage is normal or relatively low, controller output control signal controls four
Silicon-controlled (first the second silicon-controlled, full control third of silicon-controlled, full control of full control is silicon-controlled, full control the 4th is silicon-controlled) is fully on,
At this point, rectification circuit and diode full bridge rectifier effect in the prior art using Group of Silicon Controlled Rectifier at controlled rectification full-bridge
It is no different；
When detecting that it is (defeated i.e. in conventional 16 section 12V battery groups configuration ups system that input line voltage is higher than limit value
Entering voltage is more than 268Vac) when, controller controls four silicon-controlled angles of flow, so that four silicon-controlled incomplete conductings, defeated
Enter DC bus (DCBUS) voltage that voltage obtains after rectification circuit be limited in certain high magnitudes and it is unlikely more
It is high.Input voltage is higher, and controller controls that the silicon-controlled angle of flow is smaller, so that DC bus (DCBUS) electricity that rectification obtains
Pressure is limited in high magnitudes no more than 400Vdc always, it is ensured that UPS related device it is safe and reliable.
Since the conventional stress levels of silicon-controlled device itself are 600V, high alternating current inputs electricity again under normal circumstances
Pressure can meet the application range of this limitation high-pressure type ultra-wide alternating current input range rectifier, then high input voltage all will
It is isolated in the front end of 600V voltage-resistance silicon controlled, UPS is significantly increased to the claimed range of input alternating current in this, fully meets
The UPS normal reliable in the severe area of alternating current input uses.
The half control type controlled rectification full-bridge of two controlled members includes first diode, the second diode, half control first
Silicon-controlled and half control second is silicon-controlled；The anode of the first diode is connect with the anode of the second diode；First diode
The cathode anode silicon-controlled with half control first connect, the silicon-controlled cathode of half control first and the silicon-controlled cathode of half control second connect
It connects, the silicon-controlled anode of half control second is connect with the cathode of the second diode；The firewire and first diode of input voltage and half
Control the first silicon-controlled common end connection, the zero curve of input voltage and the second diode and the silicon-controlled common end company of half control second
It connects；The anode of the half control first silicon-controlled common end and filter capacitor silicon-controlled with half control second is connect, first diode and the
The common end of two diodes and the negative terminal of filter capacitor connect；The silicon-controlled control electrode silicon-controlled with half control second of half control first is equal
It is connect with controller.
Rectifier bridge uses two diodes and two silicon-controlled half control type controlled rectification circuit forms built, can
The effect reached and four Group of Silicon Controlled Rectifier above using at full control structure it is almost the same, for no other reason than that only there are two controllable
Silicon can be used for controlled conducting, and controller controls in square one high input voltage the silicon-controlled angle of flow can relatively much shorter one
A bit, limitation high pressure principle is consistent.
The circuit further includes having the first inductance, and the first inductance is arranged on the firewire of input voltage, one end of the first inductance
It is connect with the firewire of input voltage, the other end of the first inductance and the input terminal of controllable rectifier bridge connect.And it is arranged in input terminal
First inductance can play the role of brought harmonic wave when inhibition reverse-blocking tetrode thyristor work, to reduce rectification circuit to utility grid
Interference.
The utility model it is critical that on the one hand, it is ingenious with controlled rectification circuit the characteristics of, controlled by controller
The rectifying full bridge bridge arm conduction status, changes the angle of flow of controlled bridge arm, ignores in the input voltage where applicable of circuit, and
Certain restricted conducting intervention is carried out in overtension, the input voltage of circuit is higher, and restriction effect is bigger, to protect
Even if having demonstrate,proved, input voltage is very high, and the DC bus-bar voltage rectified is limited in safe range always, is no more than its upper limit
Value plays the effect of limitation input high pressure, so that the upper limit of input voltage of circuit is greatly improved, or even under normal circumstances almost
It may not need consideration upper limit of input voltage；On the other hand, controllable type rectifying full bridge circuit is being used, is being controlled by controller controllable
It, can be by input transformer commonly used in the prior art after the conducting situation of bridge arm effectively promotes the tolerance degree to high input voltage
It extracts, significantly reduces circuit cost, reduce circuit volume, achieve good economic benefit.
The advantage of the utility model is: compared with the prior art, rectification circuit provided by the utility model is by existing skill
The uncontrollable full-bridge being constituted by a diode in art is changed to controlled rectification full-bridge, the control using controller to controlled rectification full-bridge
System, is limited in the scope of application for DC bus (DCBUS) voltage, eliminates high input voltage to power device of inverter, filtering
Capacitor etc. is easy the threat by stress levels constraint device, changes whole circuit to the tolerance of mains input voltage, thus thorough
Bottom is abandoned to guarantee the reliability of circuit and the input transformer that is arranged in former rectification circuit, and entire simple circuit is practical, at
Originally, under the premise of volume and weight all declines to a great extent, reliability is significantly promoted, and is applicable in the uninterrupted of wider alternating current input range
Power work environment.
Detailed description of the invention
Fig. 1 is the Basic Topological figure of the double conversion ups systems of existing power frequency.
Fig. 2 is the rectification circuit in existing single-phase input type ups system.
Fig. 3 be it is existing can not control rectifying circuit be applied to schematic block circuit diagram in practical single-phase ups system.
Fig. 4 is the circuit that the uninterruptible power supply rectification circuit such as specific embodiment one of the utility model wide input range indicates
Functional block diagram.
Fig. 5 is the uninterruptible power supply rectification circuit voltage oscillogram of the utility model wide input range, wherein input voltage
When normal as shown in a, b, c, d, a is the waveform diagram of rectification circuit input voltage；B is that controller control four is silicon-controlled completely
Driving voltage waveform diagram when conducting；Pulsating direct current when c is four silicon-controlled fully on after rectifier rectification
Voltage oscillogram；Approximation of the rectified pulsatory voltage after filter capacitor filtering is straight when d is four silicon-controlled fully on
Flow voltage oscillogram；When input voltage is excessively high as shown in e, f, g, h, e is the waveform diagram of rectification circuit input voltage；F is control
Device controls driving voltage waveform diagram when four silicon-controlled incomplete conductings；G is passed through when being four silicon-controlled incomplete conductings
Pulsating dc voltage waveform diagram after the rectification of over commutation device；Rectified pulsatory voltage when h is four silicon-controlled incomplete conductings
Approximate DC voltage oscillogram after being filtered by filter capacitor.
Fig. 6 is the circuit that the uninterruptible power supply rectification circuit such as specific embodiment two of the utility model wide input range indicates
Functional block diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
To achieve the above object, the technical solution of the utility model is as follows:
Specific embodiment one:
Referring to fig. 4 shown in -5, the utility model provides a kind of uninterruptible power supply rectification circuit of wide input range, the rectification
Circuit includes controlled rectification full-bridge, controller and the filter capacitor that controlled variable changes conducting situation, and the two of controllable rectifier bridge are defeated
Enter end to connect with the zero curve of single phase poaer supply and firewire respectively, two output ends of controllable rectifier bridge connect with the both ends of filter capacitor respectively
It connects, controller is connect with the control electrode of controlled rectification full-bridge.
When rectification circuit practical application provided by the utility model is in ups system, alternating current input is direct without transformer
Controlled rectification full-bridge is inputted, its conduction status can be changed in controlled rectification full-bridge under the control of the controller, to alternating current input into
After row rectification, exported after the smoothing effect of filter capacitor.
It is emphasized that the controller referred in the present invention is the prior art, which rises in circuit
The effect of relevant parameter into real-time detection and control circuit, under the control of the controller, the bridge arm of controlled rectification full-bridge is led
Logical situation changes at any time.In practical application, technical staff can need to be detected according to circuit and the parameter requirements controlled voluntarily select
The specific setting of controller.The utility model it is critical that control the rectifying full bridge bridge arm conduction status variation effect, no
It is to play the role of pressure stabilizing output, but to play limitation high pressure.
Controlled rectification full-bridge includes controlled member, controlled member be it is silicon-controlled, the quantity of controlled member is four.
Controlled rectification full-bridge includes the first controllable silicon SCR 11 of full control, the second controllable silicon SCR 12 of full control, control third can entirely
Control the 4th controllable silicon SCR 14 of silicon SCR13 and full control；The anode of the first controllable silicon SCR 11 of full control and full control third controllable silicon SCR 13
Anode connection, the full cathode for controlling the first controllable silicon SCR 11 connect with the anode for controlling the second controllable silicon SCR 12 entirely, controls second entirely
The cathode of controllable silicon SCR 12 connect with the cathode of the 4th controllable silicon SCR 14 of full control, the full anode for controlling the 4th controllable silicon SCR 14 and
The cathode connection of full control third controllable silicon SCR 13；The firewire of input voltage and the first controllable silicon SCR 11 of full control and full control second can
The common end connection of silicon SCR12 is controlled, the zero curve of input voltage and full control third controllable silicon SCR 13 and full control the 4th are silicon-controlled
The common end of SCR14 connects；The anode of filter capacitor C11 and the second controllable silicon SCR 12 of full control and the 4th controllable silicon SCR 14 of full control
Common end connection, the negative terminal of filter capacitor C11 and the first controllable silicon SCR 11 of full control and the public affairs for controlling third controllable silicon SCR 13 entirely
End connection altogether；Control electrode, the control electrode of the second controllable silicon SCR 12 of full control, the full control third of the first controllable silicon SCR 11 of full control are controllable
The control electrode of silicon SCR13, the control electrode of the 4th controllable silicon SCR 14 of full control are connect with controller.
Rectification circuit provided by the utility model is applied in actual uninterruptible power system, such as sets controllable rectifier bridge
It is set to the full-control type controlled rectification circuit form that four bridge arms are built by controlled device, we are still conventional with battery group BAT
Be set as the design scheme of the 16 concatenated ups systems of section 12V battery: four silicon-controlled composed pressure limiting rectifier bridges exist
Under the control of controller, input AC alternating current is transformed to Rectified alternating current, and after the smoothing effect of filter capacitor C11,
Direct current electricity output is provided for subsequent conditioning circuit.Controller carries out real-time monitoring to the voltage of input alternating current.
When controller detects that input line voltage is normal or relatively low, controller output control signal controls four
It is silicon-controlled that (the first controllable silicon SCR 11 of full control, the second controllable silicon SCR 12 of full control, full control third controllable silicon SCR 13, full control the 4th can
Control silicon SCR14) it is fully on, at this point, using Group of Silicon Controlled Rectifier at the rectification circuit and in the prior art two of controlled rectification full-bridge
Pole pipe full bridge rectifier effect is no different.
When detecting that it is (defeated i.e. in conventional 16 section 12V battery groups configuration ups system that input line voltage is higher than limit value
Entering voltage is more than 268Vac) when, controller control four is silicon-controlled, and (the first controllable silicon SCR 11 of full control, full control second are silicon-controlled
SCR12, full control third controllable silicon SCR 13, the 4th controllable silicon SCR 14 of full control) the angle of flow so that four silicon-controlled are not exclusively led
It is logical, DC bus (DCBUS) voltage that input voltage obtains after rectification circuit be limited in certain high magnitudes without
To higher.Input voltage is higher, and controller controls that the silicon-controlled angle of flow is smaller, so that the DC bus that rectification obtains
(DCBUS) voltage is limited in the high magnitudes no more than 400Vdc always, it is ensured that UPS related device it is safe and reliable.
Since the conventional stress levels of silicon-controlled device itself are 600V, high alternating current inputs electricity again under normal circumstances
Pressure can meet the application range of this limitation high-pressure type ultra-wide alternating current input range rectifier, then high input voltage all will
It is isolated in the front end of 600V voltage-resistance silicon controlled, UPS is significantly increased to the claimed range of input alternating current in this, fully meets
The UPS normal reliable in the severe area of alternating current input uses.
The circuit further includes having the first inductance L11, the first inductance L11 to be arranged on the firewire of input voltage, the first inductance
One end of L11 and the firewire of input voltage connect, and the other end of the first inductance L11 and the input terminal of controllable rectifier bridge connect.And
When the first inductance L11, which is arranged, in input terminal can play the role of inhibiting reverse-blocking tetrode thyristor work, brought harmonic wave, whole to reduce
Interference of the current circuit to utility grid.
Specific embodiment two:
Referring to Fig. 6, the utility model provides a kind of uninterruptible power supply rectification circuit of wide input range, the rectification circuit
It include controlled rectification full-bridge, controller and the filter capacitor that controlled variable changes conducting situation, two input terminals of controllable rectifier bridge
It being connect respectively with the zero curve of single phase poaer supply and firewire, two output ends of controllable rectifier bridge are connect with the both ends of filter capacitor respectively,
Controller is connect with the control electrode of controlled rectification full-bridge.
When rectification circuit practical application provided by the utility model is in ups system, alternating current input is direct without transformer
Controlled rectification full-bridge is inputted, its conduction status can be changed in controlled rectification full-bridge under the control of the controller, to alternating current input into
After row rectification, exported after the smoothing effect of filter capacitor.
It is emphasized that the controller referred in the use of the new type is the prior art, which rises in circuit
The effect of relevant parameter into real-time detection and control circuit, under the control of the controller, the bridge arm of controlled rectification full-bridge is led
Logical situation changes at any time.In practical application, technical staff can need to be detected according to circuit and the parameter requirements controlled voluntarily select
The specific setting of controller.The utility model it is critical that control the rectifying full bridge bridge arm conduction status variation effect, no
It is to play the role of pressure stabilizing output, but to play limitation high pressure.
Controlled rectification full-bridge includes controlled member, controlled member be it is silicon-controlled, the quantity of controlled member is two.
Controlled rectification full-bridge includes first diode D21, the second diode D22, the first controllable silicon SCR of half control 21 and half
Control the second controllable silicon SCR 22；The anode of the first diode D21 is connect with the anode of the second diode D22；First diode
The cathode of D21 is connect with the anode of the first controllable silicon SCR of half control 21, the cathode and half control second of the first controllable silicon SCR of half control 21
The cathode of controllable silicon SCR 22 connects, and the anode of the second controllable silicon SCR of half control 22 is connect with the cathode of the second diode D22；Input
The firewire of voltage is connect with the common end of first diode D21 and the first controllable silicon SCR of half control 21, the zero curve of input voltage and
Two diode D22 are connected with the common end of the second controllable silicon SCR of half control 22；The first controllable silicon SCR of half control 21 and half control second can
The anode of the common end and filter capacitor of controlling silicon SCR22 connects, the common end of first diode D21 and the second diode D22 and
The negative terminal of filter capacitor C21 connects；The control electrode of the first controllable silicon SCR of half control 21 and the second controllable silicon SCR of half control 22 with control
Device connection processed.
Rectifier bridge using two diodes and two Group of Silicon Controlled Rectifier at half control structure, the effect that can reach with it is upper
Four Group of Silicon Controlled Rectifier used in specific embodiment one in text at full control structure it is almost the same, for no other reason than that only there are two controllable
Silicon can be used for controlled conducting, and controller controls in square one high input voltage the silicon-controlled angle of flow can relatively much shorter one
A bit, limitation high pressure principle is consistent.
The circuit further includes having the first inductance L21, the first inductance L21 to be arranged on the firewire of input voltage, the first inductance
One end of L21 and the firewire of input voltage connect, and the other end of the first inductance L21 and the input terminal of controllable rectifier bridge connect.And
When the first inductance L21, which is arranged, in input terminal can play the role of inhibiting reverse-blocking tetrode thyristor work, brought harmonic wave, whole to reduce
Interference of the current circuit to utility grid.
The advantage of the utility model is: compared with the prior art, rectification circuit provided by the utility model is by existing skill
The uncontrollable full-bridge being constituted by a diode in art is changed to controlled rectification full-bridge, the control using controller to controlled rectification full-bridge
System, is limited in the scope of application for DC bus (DCBUS) voltage, eliminates high input voltage to power device of inverter, filtering
Capacitor etc. is easy the threat by stress levels constraint device, changes whole circuit to the tolerance of mains input voltage, thus thorough
Bottom is abandoned to guarantee the reliability of circuit and the input transformer that is arranged in former rectification circuit, and entire simple circuit is practical, at
Originally, under the premise of volume and weight all declines to a great extent, reliability is significantly promoted, and is applicable in the uninterrupted of wider alternating current input range
Power work environment.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the guarantor of the utility model within novel spirit and principle
Within the scope of shield.
Claims (2)
1. a kind of uninterruptible power supply rectification circuit of wide input range, which is characterized in that the rectification circuit includes controlled variable
Change conducting situation controlled rectification full-bridge, controller and filter capacitor, two input terminals of the controlled rectification full-bridge respectively with list
The zero curve of phase power supply is connected with firewire, and two output ends of the controlled rectification full-bridge are connect with the both ends of filter capacitor respectively, institute
Controller is stated to connect with the control electrode of controlled rectification full-bridge；
The controlled rectification full-bridge includes controlled member, the controlled member be it is silicon-controlled, the quantity of the controlled member is
Four or two；
Wherein, the controlled rectification full-bridge include first the second silicon-controlled, full control third of silicon-controlled, full control of full control it is silicon-controlled and
Full control the 4th is silicon-controlled；The first silicon-controlled anode of full control anode silicon-controlled with full control third is connect, described complete to control the
One silicon-controlled cathode is connect with the second silicon-controlled anode of full control, and the silicon-controlled cathode of the full control second and full control the 4th can
The cathode connection of silicon is controlled, the 4th silicon-controlled anode of the full control cathode silicon-controlled with the full control third is connect；Input electricity
The firewire of pressure and full control first are silicon-controlled and the second silicon-controlled common end of complete control connect, the zero curve of input voltage with control third entirely
It is silicon-controlled to be connected with the 4th silicon-controlled common end of full control；The anode of the filter capacitor and full control second are silicon-controlled and complete control the
Four silicon-controlled common ends connections, the negative terminal of the filter capacitor and full control first are silicon-controlled and complete control silicon-controlled public of third
End connection；The silicon-controlled control of the first silicon-controlled control electrode of the full control, the second silicon-controlled control electrode of full control, full control third
Pole, the 4th silicon-controlled control electrode of full control are connect with controller；
Alternatively, controlled rectification full-bridge includes first diode, the second diode, half control first is silicon-controlled and half control second is controllable
Silicon；The anode of the first diode is connect with the anode of the second diode；The cathode and half control first of the first diode
Silicon-controlled anode connection, the silicon-controlled cathode of the half control first cathode silicon-controlled with half control second are connect, the half control
Second silicon-controlled anode is connect with the cathode of the second diode；The firewire and first diode and half control first of input voltage can
The common end connection of silicon is controlled, the zero curve of the input voltage common end silicon-controlled with the second diode and half control second is connect；It is described
The anode of the half control first silicon-controlled common end and filter capacitor silicon-controlled with half control second is connect, the first diode and the
The common end of two diodes and the negative terminal of filter capacitor connect；The half control first is silicon-controlled with the silicon-controlled control of half control second
Extremely it is connect with controller.
2. the uninterruptible power supply rectification circuit of wide input range as described in claim 1, which is characterized in that the circuit further includes
There is the first inductance, first inductance is arranged on the firewire of input voltage, one end of first inductance and input voltage
Firewire connection, the other end of first inductance and the input terminal of controllable rectifier bridge connect.
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| CN201822186174.8U CN209571963U (en) | 2018-12-22 | 2018-12-22 | A kind of uninterruptible power supply rectification circuit of wide input range |
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| CN201822186174.8U CN209571963U (en) | 2018-12-22 | 2018-12-22 | A kind of uninterruptible power supply rectification circuit of wide input range |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510489A (en) * | 2018-12-22 | 2019-03-22 | 深圳市捷益达电子有限公司 | A kind of the uninterruptible power supply rectification circuit and its working method of wide input range |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510489A (en) * | 2018-12-22 | 2019-03-22 | 深圳市捷益达电子有限公司 | A kind of the uninterruptible power supply rectification circuit and its working method of wide input range |
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