CN209120077U - A kind of uninterruptible power supply inverter output circuit of resistance to load shock - Google Patents
A kind of uninterruptible power supply inverter output circuit of resistance to load shock Download PDFInfo
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- CN209120077U CN209120077U CN201822160536.6U CN201822160536U CN209120077U CN 209120077 U CN209120077 U CN 209120077U CN 201822160536 U CN201822160536 U CN 201822160536U CN 209120077 U CN209120077 U CN 209120077U
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Abstract
The utility model discloses a kind of uninterruptible power supply inverter output circuit of resistance to load shock, which includes armature winding, iron core and secondary windings, and armature winding is wound on the primary side side of iron core, and armature winding is connect with the output end of external inversion full-bridge；The secondary windings is wound on the secondary side of iron core, and secondary windings is connect with external loading；The circuit further includes having shock resistance winding, and for shock resistance winding technique on iron core, shock resistance winding is that three-phase closes coiling group, the shock resistance winding and the same phase of armature winding.The utility model uses the structure that shock resistance winding is added on three-phase output transformer, the damping action that main flux is changed using shock resistance winding, transmitting of the load shock electric current to armature winding is reduced, very strong resistance to load shock effect is reached with lower cost and succinct reliable circuit structure.
Description
Technical field
The utility model belongs to uninterruptible power supply manufacturing field, in particular to a kind of uninterruptible power supply of resistance to load shock is inverse
Become output 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.
It is disclosed in the patent application document that number of patent application is " 201310483226.7 " a kind of based on MR16 monolithic
The totally digitilized UPS circuit of machine.The invention includes system main circuit and DC voltage sample circuit, and the system main circuit includes
First switch, second switch, first resistor, first capacitor, the second capacitor, third capacitor, the first triode, the second triode,
Third transistor, the 4th triode, the first zener diode, the second zener diode, third zener diode, the 4th pressure stabilizing two
Pole pipe, transformer and inductance, accumulator battery voltage pass through full bridge inverter inversion, then after Industrial Frequency Transformer boosts and filters
Output.Inverter involved in the invention is typical inverter, is closed using the induction of transformer and secondary coil
System exports the alternating current for completing inversion by transformer.
The structures of the UPS three-phase inverting circuits of the double conversions of existing three-phase main-frequency as shown in Fig. 2, the inverter circuit by three-phase
Inversion full-bridge, three-phase output transformer, three-phase output filter capacitor and inversion detect controller；Wherein, three-phase inversion full-bridge has
Six switching tubes are constituted, and when which works, controller controls the HF switch that three-phase inversion full-bridge carries out sinusoidal pulse width modulation
The DC power conversion of input is the high-frequency impulse that pulse width presses sinusoidal rule variation by copped wave, is then become by three-phase output
Depressor and three-phase output filter capacitor carry out voltage transformation and filtering, to the three-phase alternating current of load outputting standard.As inversion is examined
The exception that controller detects output voltage is surveyed, then the switch that controller controls three-phase inversion full-bridge is detected by inversion immediately
Pipe, adjusts high-frequency impulse width, and appropriate adjustment output voltage remains the three-phase alternating voltage of output and reaches dynamic equilibrium
It is relatively stable.When detecting that output electric current is bigger than normal such as inversion detection controller, then inversion detects controller starting protection mechanism,
Suitable protecting movement is taken (such as to shut down to the power switch tube of all or part of bridge arm of inversion full-bridge, electric current drop to be output
As low as reopening work again after appropriate level), if output overloading is serious, inversion detection controller even controls truncated system,
Protect the circuit from impact.
In practical applications, the secondary coil of the primary coil of inversion full-bridge connection transformer, transformer connects load, greatly
Type is supported on starting or carries out usually generating Transient Currents during various operations, and such Transient Currents pass through output
Transformer just/secondary coil between electromagnetic induction be transmitted in primary coil so that the inversion full bridge power device of UPS is frequent
The impact for bearing all kinds of Transient Currents is very easy to cause the damage of inverter power device, in the production application of industrial enterprise
In, such Transient Currents are especially common, are particularly acute to the impact of inverter.
In existing uninterruptible power supply manufacturing technology, to overcome the punching caused by inverter power device of load transient high current
It hits, substantially there are two types of processing methods.
The first processing method is to increase the rated current of inverter power device, to improve the electronic component in inverter
Impact resistance it is horizontal.The drawbacks of such processing method is: the rated current for improving component then means device entirety
Manufacturing cost sharp rises, and on the other hand, loads steady state operating current of the Transient Currents compared to load of starting
Often several times upper greatly even tens of hundreds of times, resist load transient high current with the method for improving electronic component rated current
Impact, be still difficult to reach very high reliability.
Second processing method is to add more highly sensitive transient state overcurrent protection measures, although such method can be
Load acts in time when impacting by Transient Currents, protects inverter, but it is bright also to will cause inverter output voltage appearance simultaneously
Aobvious fluctuation, generates certain influence to the steady operation by the uninterruptible power system institute bringing onto load equipment.
Such as it is disclosed in the patent application document of number of patent application " 201810365832.1 " a kind of with overcurrent guarantor
The inverter circuit of protective function, the circuit include boost module, full-bridge inverting module, current detection module, comparison module, control
Module and output module, the boost module, the full-bridge inverting module and the output module are sequentially connected electrically, described
The connection of output end that current detection module is connect with the full-bridge inverting module, the output end of the current detection module with it is described
The comparison end of comparison module connects, and the output end of the comparison module is connect with the control module, the control module and institute
The connection of full-bridge inverting module is stated, the current detection module is used to detect the output electric current of the full-bridge inverting module and by its turn
It is changed to first voltage signal, the comparison module is used to for the first voltage signal being compared with the predeterminated voltage, and
Comparison result is exported to the control module, the control module is used to be greater than the predeterminated voltage when the first voltage signal
When, shutdown signal is exported to the full-bridge inverting module, so that the full-bridge inverting module is ended.Obviously, described in the invention
Overcurrent protection function is also protected just because of overcurrent although certain effect can be played to preventing full-bridge inverting module from burning out
The protective effect of protection circuit causes the protection of full-bridge inverting module temporary over-current to stop working, so that moment occurs in inverter output voltage
Fall, unnecessary shadow is generated to other load equipments worked normally originally for being connected to the uninterruptible power supply output end simultaneously
It rings.
Summary of the invention
Anti-impact is added on three-phase output transformer to solve the above problems, the purpose of this utility model is to provide one kind
Winding is hit, the damping action changed using shock resistance winding to transformer main flux cuts down load shock electric current to armature winding
Transmitting, to reach the uninterruptible power supply inverter output circuit with very strong resistance to load shock.
Another of the utility model is designed to provide a kind of uninterruptible power supply inverter output circuit of resistance to load shock,
The circuit structure is simple, manufacturing cost is low, it is easily manufactured, be easily achieved, and high reliablity, efficiently solve a large amount of such as industry
Big scale production equipment etc. has widened original commercialization compared with the Transient Currents shock problem of great start-up current kinds of loads equipment significantly
The limitation that uninterruptible power system is confined to as the accurate high-end electronic devices power supply such as computer, network system, data center, energy
Enough extensive uses for adapting to more industrial load equipments, or even can be set for industrial load equipment and accurate high-end electronic
It is standby that mixing application, benefit highly significant are provided.
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 inverter output circuit of resistance to load shock, which includes primary
Winding, iron core and secondary windings, armature winding are wound on the primary side side of iron core, the output end of armature winding and external inversion full-bridge
Connection；The secondary windings is wound on the secondary side of iron core, and secondary windings is connect with external loading；The circuit further includes having anti-impact
Winding is hit, for shock resistance winding technique on iron core, shock resistance winding is that three-phase closes coiling group, the shock resistance winding and primary
The same phase of winding.
The shock resistance winding that three-phase closure is added on three-phase output transformer, when generating electric current in load, main flux
Generation variation tendency is empty for external loading or is the stable linear load of three-phase equilibrium, shock resistance winding induced electricity stray arrow
It measures and is zero, shock resistance winding does not work, i.e., does not have an impact to armature winding；It is the non-equilibrium stabilization of three-phase for external loading
Load or nonlinear load, the faradic vector sum generated on shock resistance winding are not zero, and the work of shock resistance winding generates
Backing field, influence of the load to main flux is resisted in part, to alleviate influence of the load current to armature winding；And for
There is Transient Currents load, main flux tends to sharply increase, and three-phase current vector sum correspondence increased dramatically on shock resistance winding,
Shock resistance winding generates backing field, and high degree resists influence of the load to main flux, to effectively limit load shock
Influence of the electric current to armature winding, guarantee intercept most flux change amount, avoid occurring big on armature winding
Induced current, and then impact the inverter power device connected on armature winding.
Shock resistance winding includes the first winding, the second winding and the tertiary winding, the first winding, the second winding and third around
Group, which sequentially joins end to end, is closed composition shock resistance winding.Inverter output circuit provided by the utility model is mainly used in three-phase electricity
Lu Zhong, corresponds to the three-phase electricity in three-phase circuit, and the first winding, the second winding and the tertiary winding, fitting three is arranged in shock resistance winding
It mutually exports, incudes in time and intervene violent flux change.
For shock resistance winding technique in the internal layer close to iron core, secondary windings is wound on middle layer, and armature winding is wound on outer
Layer.Shock resistance winding technique most close to the internal layer of iron core, can facilitated into the sensitive capture flux change of shock resistance winding, guaranteed anti-
Impact winding acts in time, improves the sensitivity and accuracy of circuit.
Armature winding and secondary windings use Δ/Y type winding construction.It is emphasized that provided by the utility model inverse
Become output circuit and be suitable for most of transformers output occasion, is only needed in a particular application to particularly relevant in real work occasion
Parameter does simple adjustment.
After this inverter output circuit accesses external load circuit, if external loading is sky, the outside of secondary windings connection is negative
It carries to be empty, main flux is constant, non-inductive electric current in armature winding, and three-phase current vector sum is zero in shock resistance winding, shock resistance
Winding does not work；When such as external loading being the stable linear load of three-phase equilibrium, then the external loading of secondary windings connection is three
Balance each other stable linear load, then main flux tends to increase, and induced current is generated in armature winding, and miscarried by the induced electricity
Raw reverse induced magnetic field resists the influence that load current generates main flux, and three-phase current vector sum is zero in shock resistance winding,
Shock resistance winding does not work；As external loading be the non-equilibrium steady load of three-phase or nonlinear load when, then secondary windings connect
External loading be the non-equilibrium steady load of three-phase or nonlinear load, main flux tends to increase, three-phase electricity on shock resistance winding
It flow vector and is not zero, shock resistance winding generates backing field, and influence of the load to main flux is resisted in part, to alleviate negative
Carry influence of the electric current to armature winding；When as Transient Currents occur on external loading, then go out in the load of secondary windings connection
Existing Transient Currents, main flux tend to sharply increase, and three-phase current vector sum correspondence increased dramatically on shock resistance winding, shock resistance
Winding generates backing field, influence of the load to main flux is dramatically resisted, to effectively limit load shock electric current
Influence to armature winding.
The advantage of the utility model is: compared with the prior art, in the utility model, being become using exporting in three-phase
The method that shock resistance winding is added on depressor, the damping action changed using shock resistance winding to main flux reduce load punching
Transmitting of the electric current to armature winding is hit, very strong resistance to load shock effect is reached with lower cost and succinct reliable circuit structure
Fruit, the Transient Currents for efficiently solving a large amount of such as industrial large-sized production equipment compared with great start-up current kinds of loads equipment rush
Problem is hit, original commercial uninterruptible power system has been widened significantly and has been confined to as precisions such as computer, network system, data centers
The limitation of high-end electronic devices power supply can adapt to the extensive use of more industrial load equipments, or even can be industry
Type load equipment mixes application, benefit highly significant with accurate high-end electronic devices offer.
Detailed description of the invention
Fig. 1 is that existing power frequency double conversion uninterruptible power supplies open up benefit structure chart substantially.
Fig. 2 is the structural schematic diagram of three-phase inverting circuit in the uninterruptible power supply of the double conversions of existing three-phase main-frequency.
Fig. 3 is the circuit diagram of the uninterruptible power supply inverter output circuit of the resistance to load shock of the utility model.
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:
Shown in Figure 3, the utility model provides a kind of uninterruptible power supply inverter output circuit of resistance to load shock, the electricity
Road includes armature winding A, iron core and secondary windings B, and armature winding A is wound on the primary side side of iron core, armature winding A and outside
The output end of inversion full-bridge connects；The secondary windings B is wound on the secondary side of iron core, and secondary windings B is connect with external loading；
The circuit further includes having shock resistance winding C, and shock resistance winding C is wound on iron core, and shock resistance winding C is that three-phase closes coiling
Group, the same phase of the shock resistance winding C and armature winding A.
The shock resistance winding C that three-phase closure is added on three-phase output transformer, when generating electric current in load, main flux
Generation variation tendency is empty for external loading or is the stable linear load of three-phase equilibrium, shock resistance winding C induced electricity stray arrow
It measures and is zero, shock resistance winding does not work, i.e., does not have an impact to armature winding；It is the non-equilibrium stabilization of three-phase for external loading
Load or nonlinear load, the faradic vector sum generated on shock resistance winding C are not zero, and shock resistance winding C work produces
Raw backing field, influence of the load to main flux is resisted in part, to alleviate influence of the load current to armature winding；And it is right
In there is Transient Currents load, main flux tends to sharply increase, and three-phase current vector sum correspondence sharply increases on shock resistance winding
Greatly, shock resistance winding generates backing field, and high degree resists influence of the load to main flux, to effectively limit load punching
Influence of the electric current to armature winding is hit, most flux change amount is intercepted, avoids occurring on primary coiling group A by guarantee
Big induced current, and then impact the inverter power device connected on armature winding A.
Shock resistance around C group include the first winding C1, the second winding C2 and the tertiary winding C3, the first winding C1, second around
Group C2 and tertiary winding C3, which sequentially joins end to end, is closed composition shock resistance winding C.Inverter output circuit provided by the utility model
Be mainly used in three-phase circuit, the three-phase electricity in corresponding three-phase circuit, shock resistance winding C be arranged the first winding C1, second around
Group C2 and tertiary winding C3, fitting three-phase output, incudes in time and intervenes violent flux change.
Shock resistance winding C is wound on the internal layer close to iron core, and secondary windings B is wound on middle layer, and armature winding A is wound on
Outer layer.Shock resistance winding C is wound on the internal layer most close to iron core, the sensitive capture flux change of shock resistance winding C can be facilitated, is protected
Card shock resistance winding C is acted in time, improves the sensitivity and accuracy of circuit.
Armature winding C and secondary windings B uses Δ/Y type winding construction.It is emphasized that provided by the utility model
Inverter output circuit is suitable for most of transformers and exports occasion, is only needed in a particular application to phase specific in real work occasion
It closes parameter and does simple adjustment.
The advantage of the utility model is: compared with the prior art, in the utility model, being become using exporting in three-phase
The method that shock resistance winding is added on depressor, the damping action changed using shock resistance winding to main flux reduce load punching
Transmitting of the electric current to armature winding is hit, very strong resistance to load shock effect is reached with lower cost and succinct reliable circuit structure
Fruit, the Transient Currents for efficiently solving a large amount of such as industrial large-sized production equipment compared with great start-up current kinds of loads equipment rush
Problem is hit, original commercial uninterruptible power system has been widened significantly and has been confined to as precisions such as computer, network system, data centers
The limitation of high-end electronic devices power supply can adapt to the extensive use of more industrial load equipments, or even can be industry
Type load equipment mixes application, benefit highly significant with accurate high-end electronic devices offer.
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 (4)
1. a kind of uninterruptible power supply inverter output circuit of resistance to load shock, which includes armature winding, iron core and secondary
Winding, the armature winding are wound on the primary side side of iron core, and the armature winding is connect with the output end of external inversion full-bridge；Institute
The secondary side that secondary windings is wound on iron core is stated, the secondary windings is connect with external loading；It is characterized in that, the circuit also wraps
Shock resistance winding is included, for the shock resistance winding technique on iron core, the shock resistance winding is that three-phase closes coiling group, described
Shock resistance winding and the same phase of armature winding.
2. the uninterruptible power supply inverter output circuit of resistance to load shock as described in claim 1, which is characterized in that the anti-impact
Hitting winding includes the first winding, the second winding and the tertiary winding, and first winding, the second winding and the tertiary winding are sequentially first
Tail, which is connected, is closed composition shock resistance winding.
3. the uninterruptible power supply inverter output circuit of resistance to load shock as described in claim 1, which is characterized in that the anti-impact
Winding technique is hit in the internal layer close to iron core, the secondary windings is wound on middle layer, and the armature winding is wound on outer layer.
4. the uninterruptible power supply inverter output circuit of resistance to load shock as described in claim 1, which is characterized in that the primary
Winding and secondary windings use Δ/Y type winding construction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822160536.6U CN209120077U (en) | 2018-12-22 | 2018-12-22 | A kind of uninterruptible power supply inverter output circuit of resistance to load shock |
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| CN201822160536.6U CN209120077U (en) | 2018-12-22 | 2018-12-22 | A kind of uninterruptible power supply inverter output circuit of resistance to load shock |
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| CN209120077U true CN209120077U (en) | 2019-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378986A (en) * | 2018-12-22 | 2019-02-22 | 深圳市捷益达电子有限公司 | A kind of uninterruptible power supply inverter output circuit of resistance to load shock |
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2018
- 2018-12-22 CN CN201822160536.6U patent/CN209120077U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378986A (en) * | 2018-12-22 | 2019-02-22 | 深圳市捷益达电子有限公司 | A kind of uninterruptible power supply inverter output circuit of resistance to load shock |
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