CN110365198A - The power of alterating and direct current handover control system and method for inverter - Google Patents
The power of alterating and direct current handover control system and method for inverter Download PDFInfo
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- CN110365198A CN110365198A CN201910745152.7A CN201910745152A CN110365198A CN 110365198 A CN110365198 A CN 110365198A CN 201910745152 A CN201910745152 A CN 201910745152A CN 110365198 A CN110365198 A CN 110365198A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
Abstract
The present invention provides the power of alterating and direct current handover control system and method for inverter, in the system, the input terminal of power supply switching control module is directly connected to the output end of DC power supplier, that is, acquires the output voltage signal of the DC power supplier.And the output voltage signal is converted to the control signal of the on or off state of control AC power supply module.The output voltage signal of DC power supplier is directly converted to the control signal of control AC power supply module working condition by the control system, i.e., the working condition of control AC power supply module is directly gone using the biggish voltage signal of power of DC power supplier output.It therefore, there is no need to digit chip and carry out the processes such as signal processing and analysis, there is no need to occupy the I/O interface of digit chip, also, it is not necessary to reduce hardware cost by the driving power of driving circuit increase control signal.
Description
Technical field
The invention belongs to power technique fields more particularly to the power of alterating and direct current handover control systems and method of inverter.
Background technique
In field of photovoltaic power generation, the needs such as fan, driver and the controller of inverter are powered by accessory power supply.
The accessory power supply of inverter generally include DC auxiliary supply with exchange accessory power supply.Different situations is using different
Accessory power supply be inverter power supply, for example, grid-connected inverters power generation when, by DC auxiliary supply be inverter power supply, be
Reduction AC power source idling consumption when DC auxiliary supply is powered, closes exchange accessory power supply；When inverter is standby, it is
Meet the functions such as night PID reparation, inverter software upgrading, needs to exchange auxiliary power supply power supply.That is, DC auxiliary supply is opened
After machine, need to control exchange accessory power supply shutdown；After DC auxiliary supply shutdown, need to control exchange accessory power supply booting.Mesh
Preceding control program is needed to detect the working condition of DC auxiliary supply, is passed through chip using the control of the IC chips such as DSP or ARM
I/O interface realize accessory power supply switching on and shutting down control.Simultaneously as the driving capability of chip is limited, it is thus typically necessary to set
Count driving circuit.This scheme occupies a limited number of I/O interfaces on chip, in addition, it is desirable to which design driven circuit, increases
Hardware cost.
Summary of the invention
In view of this, the purpose of the present invention is to provide the power of alterating and direct current handover control system and method for inverter, with
The I/O interface by chip solved in the related technology realizes that accessory power supply switching on and shutting down control keeps existing hardware cost high and wants
The technical issues of occupying a limited number of I/O interfaces on chip, disclosed specific technical solution is as follows:
In a first aspect, the present invention provides a kind of power of alterating and direct current handover control systems of inverter, comprising: DC power supply
Module, AC power supply module and power supply switching control module；
The input terminal of the DC power supplier connects DC power supply, output end connection load；
The input terminal of the AC power supply module connects communication power supply, and output end connects the load；
The input terminal of the power supply switching control module connects the output end of the DC power supplier, the power supply switching
The output end of control module connects the control terminal of the AC power supply module, and the power supply switching control module is used for will be described straight
The output voltage signal of galvanic electricity source module is converted to the control signal for controlling the AC power supply module on or off.
In one possible implementation, the power supply switching control module is specifically used for:
When the output voltage signal of the DC power supplier is high level signal, the output voltage signal is converted
Control signal is turned off for AC power source, the AC power source shutdown control signal is closed for controlling the AC power supply module；
When the output voltage signal of the DC power supplier is low level signal, the output voltage signal is converted
For AC power source switch-over control signal, the AC power source switch-over control signal is for controlling the AC power supply module conducting.
In alternatively possible implementation, the power supply switching control module is photo-coupler；
The input terminal of the photo-coupler connects the output end of the DC power supplier；
The collector input setting voltage signal of phototriode, emitter connect the alternating current in the photo-coupler
The control terminal of source module, and the emitter connects ground terminal via the first divider resistance.
In another possible implementation, the power supply switching control module is photo-coupler；
The input terminal of the photo-coupler connects the output end of the DC power supplier；
The collector of phototriode connects the control terminal of the AC power supply module, and the current collection in the photo-coupler
Pole connects ground terminal by the second divider resistance input high level signal, the emitter of the phototriode.
In alternatively possible implementation, the power supply switching control module is relay；
The coil of the relay connects the output end of the DC power supplier；
One end of the normally opened contact of the relay connects the control terminal of the AC power supply module, and the end is via third
Divider resistance connects ground terminal, the other end input setting voltage signal of the normally opened contact.
In another possible implementation, the power supply switching control module is relay；
The coil of the relay connects the output end of the DC power supplier；
One end of the normally opened contact of the relay connects the control terminal of the AC power supply module, and the end is via the 4th
The other end of divider resistance input high level signal, the normally opened contact connects ground terminal.
In another possible implementation, the power supply switching control module is switching tube；
The control terminal of the switching tube connects the output end of the DC power supplier, the first end input of the switching tube
Voltage signal is set, the second end of the switching tube connects the control terminal of the AC power supply module, and the second end connects
Ground terminal.
In alternatively possible implementation, the switching tube is metal oxide semiconductor field-effect metal-oxide-semiconductor, described
The grid of metal-oxide-semiconductor is the control terminal, drain electrode is the first end, source electrode is the second end；
Alternatively,
The switching tube is triode, and the base stage of the triode is the control terminal, the extremely described first end of current collection, hair
Emitter-base bandgap grading is the second end.
In another possible implementation, the DC power supplier and the AC power supply module include isolation
Type transformation topology or non-isolation type transformation topology；
The isolated form transformation topology includes any of the following: Flyback transformation topology, Forward transformation topology,
Push-Pull transformation topology, Half-Bridge transformation topology；
The non-isolation type transformation topology includes any of the following: Buck transformation topology, Boost transformation topology, Buck-
Boost transformation topology, Sepic transformation topology.
Second aspect, the present invention also provides a kind of power of alterating and direct current method for handover control of inverter, are applied to first
The power of alterating and direct current handover control system of inverter described in any one possible implementation of aspect, which comprises
Acquire the output voltage signal of DC power supplier；
When the output voltage signal is high level signal, the output voltage signal is converted to described in directly controlling
The AC power source shutdown control signal that AC power supply module is closed；
When the output voltage signal is low level signal, the output voltage signal is converted to described in directly controlling
The AC power source switch-over control signal of AC power supply module power supply.
The input terminal of the power of alterating and direct current handover control system of inverter provided by the invention, power supply switching control module is straight
The output end of DC power supplier is connect in succession, that is, acquires the output voltage signal of the DC power supplier.And by the output voltage
Signal is converted to the control signal of the on or off state of control AC power supply module.The control system is directly by DC power supply
The output voltage signal of module is converted to the control signal of control AC power supply module working condition, i.e., directly utilizes DC power supply
The biggish voltage signal of power of module output goes the working condition of control AC power supply module.It therefore, there is no need to digit chip
The processes such as signal processing and analysis are carried out, there is no need to occupy the I/O interface of digit chip, also, it is not necessary to pass through driving circuit
The driving power for increasing control signal, reduces hardware cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of the power of alterating and direct current handover control system of inverter of the present invention；
Fig. 2 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 3 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 4 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 5 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 6 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 7 is the structural schematic diagram of the power of alterating and direct current handover control system of another inverter of the invention；
Fig. 8 is a kind of flow chart of the power of alterating and direct current method for handover control of inverter of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Figure 1, a kind of structure of the power of alterating and direct current handover control system of inverter provided by the invention is shown
Schematic diagram, the system include DC power supplier 1, AC power supply module 2 and power supply switching control module 3.
The input terminal of DC power supplier 1 connects DC power supply, output end connection load, DC power supplier 1
Required output voltage Vo1 is obtained by controlling its internal switch.Wherein, in the present embodiment, DC power supply can be light
Lie prostrate solar panel.
If system is isolated, which can use Flyback, Forward, Push-
The isolated forms transformation topology such as Pull, Half-Bridge.
If system, without isolation, which can be using Buck, Boost, Buck-Boost, Sepic etc.
Non-isolation type transformation topology.
The input terminal of AC power supply module 2 connects communication power supply, output end connection load, and AC power supply module 2 leads to
It crosses and controls its internal switch and obtain required output voltage Vo2.
If system needs to be isolated, the AC power supply module 2 can using Flyback, Forward, Push-Pull,
The isolated forms transformation topology such as Half-Bridge.
If system, without isolation, which can be using Buck, Boost, Buck-Boost, Sepic etc.
Non-isolation type transformation topology.
Wherein, in same system, the transformation topology of DC power supplier 1 and AC power supply module 2 can be selected identical
Topology can also use different topologys, herein without limitation.
Wherein, load of the invention includes but is not limited to fan, driver and the controller etc. of inverter.
The output end of the input terminal connection DC power supplier 1 of power supply switching control module 3, output end connect AC power source
The control terminal of module.The power supply switching control module 3 is used to being converted to the output voltage signal of DC power supplier 1 into control and hand over
The control signal of 2 on or off of galvanic electricity source module.
It in one possible implementation, will when the output voltage signal of DC power supplier is high level signal
The output voltage signal is converted to AC power source shutdown control signal, and AC power source shutdown control signal is for controlling alternating current
Source module is closed.When the output voltage signal of DC power supplier is low level signal, which is converted to
AC power source switch-over control signal, the AC power source switch-over control signal is for controlling AC power supply module conducting.
The input terminal of the power of alterating and direct current handover control system of inverter provided by the invention, power supply switching control module is straight
The output end of DC power supplier is connect in succession, that is, acquires the output voltage signal of the DC power supplier.And by the output voltage
Signal is converted to the control signal of the on or off state of control AC power supply module.The control system is directly by DC power supply
The output voltage signal of module is converted to the control signal of control AC power supply module working condition, i.e., directly utilizes DC power supply
The biggish voltage signal of power of module output goes the working condition of control AC power supply module.It therefore, there is no need to digit chip
The processes such as signal processing and analysis are carried out, there is no need to occupy the I/O interface of digit chip, also, it is not necessary to pass through driving circuit
The driving power for increasing control signal, reduces hardware cost.
In a kind of application scenarios, the power of alterating and direct current handover control system of inverter needs to believe forceful electric power signal and light current
Number it is isolated, under such application scenarios, power supply switching control module needs to realize using isolated form device, such as Fig. 2~Fig. 5 institute
Show, shows the schematic diagram for realizing power supply switching control module using isolated form device.
Fig. 2 is referred to, the structure for showing a kind of power of alterating and direct current handover control system of inverter provided by the invention is shown
It is intended to, AC power supply module is closed when control signal is high level in the present embodiment, and power supply switching control module uses optocoupler
Clutch is realized.
As shown in Fig. 2, the output end of the input terminal connection DC power supplier 1 of photo-coupler, specifically, photo-coupler
Input terminal, that is, light emitting diode both ends, the positive output end of the anode connection DC power supplier 1 of light emitting diode, light emitting diode
Cathode via current-limiting resistance R1 connection ground terminal.
The control terminal of the output end connection AC power supply module 2 of photo-coupler U1, the outlet side of specific photo-coupler are
Phototriode；Specifically, high level of the collector of phototriode as the output end input setting of photo-coupler
Signal Vref, the emitter of phototriode connect the control terminal of AC power supply module as another output end of photo-coupler,
And the emitter is via divider resistance R2 connection ground terminal.
Optionally, system provided in this embodiment can also include reverse-filling module 4 to prevent a power module to another
One power module output is anti-to fill energy.Reverse-filling module 4 includes the one way conducting device of two Opposite direction connections.
For example, the reverse-filling module includes diode D1 and diode D2, wherein the anode connection DC power supplier of D1
1 positive output end, the cathode of the cathode connection D2 of D1, the positive output end of the anode connection AC power supply module 2 of D2.
The course of work of the power of alterating and direct current handover control system of the inverter of the present embodiment is as follows:
(for example, in photovoltaic electric on daytime after the voltage of photovoltaic battery panel output reaches the starting voltage of DC power supplier 1
When pond plate works), DC power supplier 1 starts, and the output voltage Vo1 of output end is high level.At this point, power supply switching control
Photo-coupler U1 conducting in module 3, specifically, LEDs ON issues corresponding optical signal, optical signal makes secondary side
Phototriode conducting, at this point, voltage on R2 is equal to Vref, i.e. the control signal of power supply switching control module output
Vctrl is equal to Vref.In the present embodiment, when Vctrl is high level signal, control AC power supply module 2 is closed.Such situation
Under, it is load supplying by the voltage signal Vo1 that DC power supplier 1 exports.
When the brownout (for example, when night, photovoltaic battery panel did not worked) of photovoltaic battery panel output, DC power supply mould
Block 1 is closed, and the output voltage Vo1 of output end is low level.At this point, photo-coupler U1 in power supply switching control module 3
Light emitting diode cut-off, so that phototriode ends, the voltage on divider resistance R2 is clamped to 0, i.e. power supply switching control
The control signal Vctrl of module output is low level.Low level control signal Vctrl control AC power supply module 2 is connected, this
When the voltage signal Vo2 that is exported by AC power supply module 2 be load supplying.
Fig. 3 is referred to, the knot of the power of alterating and direct current handover control system of another inverter provided by the invention is shown
Structure schematic diagram, the power supply switching control module in the present embodiment realize that the difference with system shown in Figure 2 exists using photo-coupler
In, in the present embodiment control signal be low level when close AC power supply module.
As shown in figure 3, the anode of light emitting diode connects the positive output end of DC power supplier 1, hair in photo-coupler U2
The cathode of optical diode is via current-limiting resistance R1 connection ground terminal.
One end of the collector connection divider resistance R3 of phototriode, the other end of R3 input setting in photo-coupler U2
High level signal Vref, and the collector connection AC power supply module control terminal；The emitter of the phototriode connects
Ground terminal.
When photovoltaic battery panel work when its output voltage it is higher, DC power supplier 1 start, DC power supplier 1 it is defeated
Voltage Vo1 is high level out.At this point, photo-coupler U2 is connected, control signal Vctrl is low level, controls AC power source at this time
Module 2 is closed, and is load supplying by the voltage signal Vo1 that DC power supplier 1 exports.
When the brownout of photovoltaic battery panel output, DC power supplier 1 is closed, the output voltage Vo1 of output end
For low level.At this point, photo-coupler U2 ends, control signal Vctrl is clamped to high level Vref, the control signal of high level
Vctrl controls AC power supply module 2 and is connected, at this point, being load supplying by the voltage signal Vo2 that AC power supply module 2 exports.
Fig. 4 is referred to, the knot of the power of alterating and direct current handover control system of another inverter provided by the invention is shown
Structure schematic diagram, the power supply switching control module in the present embodiment are realized using relay, and it is height that signal is controlled in the present embodiment
AC power supply module is controlled when level to close.
As shown in figure 4, the output end of one end connection DC power supplier 1 of relay U3 interior loop, the other end of coil
Via current-limiting resistance R4 connection ground terminal.The control terminal of one end connection AC power supply module 2 of the normally opened contact of relay U3, and
The end is via divider resistance R5 connection ground terminal；The high level signal Vref of the other end input setting of normally opened contact.
When photovoltaic battery panel work when its output voltage it is higher, DC power supplier 1 start, DC power supplier 1 it is defeated
Voltage Vo1 is high level out.At this point, the coil of relay U3 obtains electric, normally opened contact closure, the voltage on divider resistance R5 is equal to
The high level Vref of setting, i.e. control signal Vctrl are high level, and control AC power supply module 2 is closed, by DC power supplier
The voltage signal Vo1 of 1 output is load supplying.
When the brownout of photovoltaic battery panel output, DC power supplier 1 is closed and output voltage Vo1 is low level.
At this point, electric current in the coil of relay U3 is 0, normally opened contact is disconnected, at this point, the voltage on divider resistance R5 be clamped to
0, i.e. control signal Vctrl is low level, and control AC power supply module 2 is connected, i.e., is believed by the voltage that AC power supply module 2 exports
Number Vo2 is load supplying.
Fig. 5 is referred to, the knot of the power of alterating and direct current handover control system of another inverter provided by the invention is shown
Structure schematic diagram, power supply switching control module is realized using relay in the present embodiment, and is controlled when controlling signal and being low level
AC power supply module is closed.
As shown in figure 5, the output end of one end connection DC power supplier of relay U4 interior loop, the other end of coil are logical
Cross current-limiting resistance R4 ground connection.The control terminal of one end connection AC power supply module 2 of normally opened contact in relay U4, and the end is logical
Cross the high level signal Vref of divider resistance R5 input setting；The other end of normally opened contact is grounded.
When photovoltaic battery panel work, its output voltage is higher, and DC power supplier 1 starts, and DC power supplier 1
Output voltage Vo1 is high level.At this point, the electric current in relay U4 increases, normally opened contact closure, by the electricity on divider resistance R5
Pressure is clamped to 0, i.e. control signal Vctrl is low level, and control AC power supply module 2 is closed, exported by DC power supplier 1
Voltage signal Vo1 be load supplying.
When the brownout of photovoltaic battery panel output, DC power supplier 1 is closed and output voltage Vo1 is low level.
At this point, the electric current in the coil of relay U4 is 0, normally opened contact is disconnected, at this point, the voltage on divider resistance R5 is Vref, i.e.,
Control signal Vctrl is high level, and control AC power supply module 2 is connected, the voltage signal Vo2 exported by AC power supply module 2
For load supplying.
In another application scenarios, the power of alterating and direct current handover control system of inverter does not need to be isolated, such application
Under scene, power supply switching control module uses non-isolation type device, such as Fig. 6 and Fig. 7, shows and is realized using non-isolation type device
The schematic diagram of power supply switching control module.
Fig. 6 is referred to, the knot of the power of alterating and direct current handover control system of another inverter provided by the invention is shown
Structure schematic diagram, power supply switching control module is realized using N-channel MOS pipe in the present embodiment.
As shown in fig. 6, the grid of NMOS tube Q1 passes through the output end of current-limiting resistance R6 connection DC power supplier 2, Q1's
The source electrode of the high level signal Vref, Q1 of drain electrode input setting are grounded by divider resistance R7.
When photovoltaic battery panel work, its output voltage is higher, and DC power supplier 1 starts and output voltage Vo1 is high electricity
It is flat.At this point, Q1 is connected, the voltage on divider resistance R7 is equal to high level signal Vref, i.e., control signal Vctrl is high level,
It controls AC power supply module 2 to close, is load supplying by the voltage signal Vo1 that DC power supplier 1 exports.
When the brownout of photovoltaic battery panel output, DC power supplier 1 is closed and output voltage Vo1 is low level.
At this point, Q1 is turned off, the voltage on divider resistance R7 is clamped to 0, i.e. control signal Vctrl is low level, controls AC power source
Module 2 is connected, i.e., is load supplying by the voltage signal Vo2 that AC power supply module 2 exports.
In other possible implementations, power supply switching control module 3 can be realized using P-channel metal-oxide-semiconductor, herein not
It repeats again.
Fig. 7 is referred to, the knot of the power of alterating and direct current handover control system of another inverter provided by the invention is shown
Structure schematic diagram, power supply switching control module is realized using NPN type triode in the present embodiment.
As shown in fig. 7, the base stage of triode Q2 passes through the output end of current-limiting resistance R8 connection DC power supplier 2, Q2's
The emitter of the high level signal Vref, Q2 of collector input setting are grounded by divider resistance R9.
When photovoltaic battery panel work, its output voltage is higher, and DC power supplier 1 starts and output voltage Vo1 is high electricity
It is flat.At this point, Q2 is connected, the voltage on divider resistance R9 is equal to high level signal Vref, i.e., control signal Vctrl is high level,
It controls AC power supply module 2 to close, is load supplying by the voltage signal Vo1 that DC power supplier 1 exports.
When the brownout of photovoltaic battery panel output, DC power supplier 1 is closed and output voltage Vo1 is low level.
At this point, Q2 is turned off, the voltage on divider resistance R9 is clamped to 0, i.e. control signal Vctrl is low level, controls AC power source
Module 2 is connected, i.e., is load supplying by the voltage signal Vo2 that AC power supply module 2 exports.
In other possible implementations, power supply switching control module 3 can be realized using PNP type triode, herein
It repeats no more.
On the other hand, the present invention also provides a kind of power of alterating and direct current method for handover control embodiments of inverter.
Fig. 8 is referred to, a kind of process of the power of alterating and direct current method for handover control of inverter provided by the invention is shown
Figure, this method are applied in the power of alterating and direct current handover control system of above-mentioned inverter, method includes the following steps:
S110 acquires the output voltage signal of DC power supplier.
The output voltage signal is converted to when output voltage signal is high level signal and directly controls exchange by S120
The AC power source shutdown control signal that power module is closed.
The output voltage signal is converted to when output voltage signal is low level signal and directly controls exchange by S130
The AC power source switch-over control signal of power module power supply.
The power of alterating and direct current method for handover control of inverter provided by the invention, directly by the output electricity of DC power supplier
Pressure signal is converted to the control signal of control AC power supply module working condition, i.e., directly utilizes the function of DC power supplier output
The biggish voltage signal of rate goes the working condition of control AC power supply module.It therefore, there is no need to digit chip and carry out signal acquisition
The processes such as analysis, there is no need to occupy the I/O interface of digit chip, also, it is not necessary to pass through driving circuit increase control signal
Driving power, reduce hardware cost.
It should be noted that in this specification the highlights of each of the examples are it is different from other embodiments it
Place, the same or similar parts between the embodiments can be referred to each other.
Device in each embodiment of the application and the module in terminal and submodule can merge according to actual needs,
It divides and deletes.
Module or submodule may or may not be physically separated as illustrated by the separation member, as mould
The component of block or submodule may or may not be physical module or submodule, it can and it is in one place, or
It may be distributed on multiple network modules or submodule.Some or all of mould therein can be selected according to the actual needs
Block or submodule achieve the purpose of the solution of this embodiment.
In addition, each functional module or submodule in each embodiment of the application can integrate in a processing module
In, it is also possible to modules or submodule physically exists alone, it can also be integrated with two or more modules or submodule
In a module.Above-mentioned integrated module or submodule both can take the form of hardware realization, can also use software function
Energy module or the form of submodule are realized.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of power of alterating and direct current handover control system of inverter characterized by comprising DC power supplier, alternating current
Source module and power supply switching control module；
The input terminal of the DC power supplier connects DC power supply, output end connection load；
The input terminal of the AC power supply module connects communication power supply, and output end connects the load；
The input terminal of the power supply switching control module connects the output end of the DC power supplier, the power supply switching control
The output end of module connects the control terminal of the AC power supply module, and the power supply switching control module is used for the direct current
The output voltage signal of source module is converted to the control signal for controlling the AC power supply module on or off.
2. system according to claim 1, which is characterized in that the power supply switching control module is specifically used for:
When the output voltage signal of the DC power supplier is high level signal, the output voltage signal is converted into friendship
It flows power remove and controls signal, the AC power source shutdown control signal is closed for controlling the AC power supply module；
When the output voltage signal of the DC power supplier is low level signal, the output voltage signal is converted into friendship
Power switching control signals are flowed, the AC power source switch-over control signal is for controlling the AC power supply module conducting.
3. system according to claim 1 or 2, which is characterized in that the power supply switching control module is photo-coupler；
The input terminal of the photo-coupler connects the output end of the DC power supplier；
The collector input setting voltage signal of phototriode, emitter connect the AC power source mould in the photo-coupler
The control terminal of block, and the emitter connects ground terminal via the first divider resistance.
4. system according to claim 1 or 2, which is characterized in that the power supply switching control module is photo-coupler；
The input terminal of the photo-coupler connects the output end of the DC power supplier；
The collector of phototriode connects the control terminal of the AC power supply module in the photo-coupler, and the collector is logical
The second divider resistance input high level signal is crossed, the emitter of the phototriode connects ground terminal.
5. system according to claim 1 or 2, which is characterized in that the power supply switching control module is relay；
The coil of the relay connects the output end of the DC power supplier；
One end of the normally opened contact of the relay connects the control terminal of the AC power supply module, and the end is divided via third
Resistance connects ground terminal, the other end input setting voltage signal of the normally opened contact.
6. system according to claim 1 or 2, which is characterized in that the power supply switching control module is relay；
The coil of the relay connects the output end of the DC power supplier；
One end of the normally opened contact of the relay connects the control terminal of the AC power supply module, and the end is via the 4th partial pressure
The other end of resistance input high level signal, the normally opened contact connects ground terminal.
7. system according to claim 1 or 2, which is characterized in that the power supply switching control module is switching tube；
The control terminal of the switching tube connects the output end of the DC power supplier, and the first end of the switching tube inputs setting
Voltage signal, the second end of the switching tube connect the control terminal of the AC power supply module, and second end connection ground connection
End.
8. system according to claim 7, which is characterized in that the switching tube is metal oxide semiconductor field-effect
Metal-oxide-semiconductor, the grid of the metal-oxide-semiconductor is the control terminal, drain electrode is the first end, source electrode is the second end；
Alternatively, the switching tube is triode, the base stage of the triode be the control terminal, the extremely described first end of current collection,
Emit the extremely described second end.
9. system according to claim 1 or 2, which is characterized in that the DC power supplier and the AC power source mould
Block includes isolated form transformation topology or non-isolation type transformation topology；
The isolated form transformation topology includes any of the following: Flyback transformation topology, Forward transformation topology, Push-
Pull transformation topology, Half-Bridge transformation topology；
The non-isolation type transformation topology includes any of the following: Buck transformation topology, Boost transformation topology, Buck-
Boost transformation topology, Sepic transformation topology.
10. a kind of power of alterating and direct current method for handover control of inverter, which is characterized in that be applied to any one of claim 1-9
The power of alterating and direct current handover control system of the inverter, which comprises
Acquire the output voltage signal of DC power supplier；
When the output voltage signal is high level signal, the output voltage signal is converted to and directly controls the exchange
The AC power source shutdown control signal that power module is closed；
When the output voltage signal is low level signal, the output voltage signal is converted to and directly controls the exchange
The AC power source switch-over control signal of power module power supply.
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