CN2859898Y - Digital photovoltaic de-to-ac converter for controlling solar energy - Google Patents
Digital photovoltaic de-to-ac converter for controlling solar energy Download PDFInfo
- Publication number
- CN2859898Y CN2859898Y CNU2005200374063U CN200520037406U CN2859898Y CN 2859898 Y CN2859898 Y CN 2859898Y CN U2005200374063 U CNU2005200374063 U CN U2005200374063U CN 200520037406 U CN200520037406 U CN 200520037406U CN 2859898 Y CN2859898 Y CN 2859898Y
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- China
- Prior art keywords
- circuit
- inverter
- circuit board
- control circuit
- casing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a digital photovoltaic de-to-ac converter for controlling solar energy, including a case, a circuit board arranged in the case, having an input end arranged on the circuit board connected with the solar cell and the output end connected to the charging protection circuit of the storage battery, wherein a discharging protection circuit and an inverting control circuit connected in turn arranged on the circuit board, and the input end of the discharging protection circuit is connected to the storage cell, while the output end of the inverting control circuit is connected to the load; the inverting control circuit includes an inverting control main circuit and an inverting main circuit, wherein the inverting main circuit adopts an inverting full-bridge circuit composed of the MOSFET power part. The utility model can match with the solar cell for using, which can output stable and pure current, to ensure the load to work normally, and has simple structure, economic, practical, stable output current, easy to be accepted by the wide consumers.
Description
Technical field
The utility model relates to a kind of inverter that can carry out inversion output to sun-generated electric power, particularly digital control solar photovoltaic inverter.
Background technology
Along with quick development of human society, energy demand is increasing, and the thing followed is that the exhausted speed of traditional energy (as coal, oil, natural gas etc.) is also more and more faster, and people utilize regenerative resource constantly seeking for this reason.Solar energy is just obtaining application more and more widely as a kind of cleaning, non-pollution of renewable energy.And the output characteristic of solar cell changes with sunshine, variation of temperature, and is therefore often steady inadequately by the electric current that solar cell produces, and is unfavorable for the operate as normal of load.
The utility model content
The purpose of this utility model is to provide a kind of digital control solar photovoltaic inverter, is used with solar cell, can export steady, pure electric current, guarantee the load operate as normal, and simple in structure, economic, practical, outputting current steadily is easy to accept into consumers in general.
The purpose of this utility model is achieved in that a kind of digital control solar photovoltaic inverter, comprise cabinet and be installed in the interior circuit board of cabinet, its input is being set on the circuit board, and its output is being connected the charge protector of storage battery with solar cell is continuous, the discharge prevention control circuit and the inverter control circuit that link to each other successively also are being set on the said circuit board, the input of discharge prevention control circuit is connecting storage battery, and the output of inverter control circuit links to each other with load; Inverter control circuit comprises inversion control main circuit and inverter main circuit, wherein the inversion full-bridge circuit of inverter main circuit for adopting the MOSFET power device to constitute.
The utility model is when work; the electric current that solar cell produces is a charge in batteries through charge protector; when the utility model inverter is connected to load; storage battery through over control circuit and inverter control circuit to the load output current; because the inversion full-bridge circuit of the inverter main circuit in the inverter control circuit for adopting the MOSFET power device to constitute; and the shutoff voltage that the sort circuit power device is born is lower; pure, the current stabilization of waveform of output; circuit anti-unbalance ability is strong, therefore can guarantee the load operate as normal.The utility model production cost is lower, and it is simple in structure, and is economic, practical, is easy to accept into consumers in general.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is that circuit of the present utility model connects block diagram;
Fig. 2 is a systematic schematic diagram of the present utility model;
Fig. 3 is an inverter main circuit schematic diagram of the present utility model;
Fig. 4 is an inversion control main circuit schematic diagram of the present utility model;
Fig. 5 looks the part section structural representation for the master of the utility model inverter casing;
Fig. 6 is the right TV structure schematic diagram of the utility model inverter casing;
Fig. 7 looks the part section structural representation for the left side of the utility model inverter casing.
Embodiment
A kind of digital control solar photovoltaic inverter, extremely shown in Figure 7 as Fig. 1, comprise cabinet and be installed in the interior circuit board of cabinet, its input is being set on the circuit board, and its output is being connected the charge protector of storage battery with solar cell is continuous, the discharge prevention control circuit and the inverter control circuit that link to each other successively also are being set on the said circuit board, the input of discharge prevention control circuit is connecting storage battery, and the output of inverter control circuit links to each other with load; Inverter control circuit comprises inversion control main circuit and inverter main circuit, and the inversion full-bridge circuit of inverter main circuit for adopting the MOSFET power device to constitute wherein is at the upper and lower side of inversion bridge circuit and be connected to the 1uF surging and absorb electric capacity.The shutoff voltage that the sort circuit power device is born is lower, and output waveform is better, just can obtain pure square wave or sine-wave current by simple filtering, and circuit anti-unbalance ability is strong, and cost is lower.As shown in Figure 1, the current/voltage testing circuit that links to each other, constitutes signal of telecommunication circulation circuit respectively with load with inverter control circuit also is being set on the utility model circuit board.
As shown in Figure 3, inverter switching device KM1 is installed, makes this inverter random break-make inverter switching device KM1 and can not damage inverter when fully loaded work at the direct current input side of inverter main circuit.As shown in Figure 4, the inversion control main circuit adopts PIC16F73 as central processing unit, and PIC16F73 has 28 pins, is RISC class single-chip microcomputer, single command cycle adopts Harvard's pipeline organization, 4 clock cycle equal an instruction execution cycle, support the ISP programming mode, FLASH ROM capacity 4K (14-bit), DATA RAM capacity 192Byte, 5 tunnel, 3 timers that work alone of 8 bit AD samples, clock frequency DC-20MHz.This single-chip microcomputer has extraordinary interference free performance and very low operation power consumption, and the reliability height is cheap, is widely used.The utility model has been simplified sample circuit; as shown in Figure 1; the electric weight testing circuit is being set on circuit board, and the signal input part of this electric weight testing circuit is connecting storage battery, and two outputs of electric weight testing circuit link to each other with charge protector and discharge prevention control circuit respectively.Like this, battery tension, interchange feedback voltage and photovoltaic module voltage are by the electric resistance partial pressure Direct Sampling, and temperature sensor (NTC resistance) is realized sampling with electric resistance partial pressure, and output current process amplifier is amplified sampling.Direct Sampling has the advantages that circuit is simple and cost is low, also is sampled in order to prevent interference signal, and method such as can adopt that FFT and integration are averaged in AD conversion just can realize the collection of signal effective value.PIC16F73 does not have hardware PWM module, and pwm signal (adopting digital synthesis technology to realize the SPWM signal) can take place its 2 universaling I/O ports, and a timer regularly interrupts as system, and the timer as the PID adjuster uses.May lead directly to when preventing that general purpose I/O from powering in system, in hardware circuit, add the time-delay that powers on, the risk when having avoided powering on.Drive circuit adopts general light lotus root TLP521-1 isolation drive, does to recommend to drive based on 3 triodes and has realized the negative pressure shutoff.Driving power utilizes NE555 to constitute positive exciting switching voltage regulator, exports 3 tunnel 20V power supplys of isolating mutually.PIC16F73 universaling I/O port generation signal is used in the control that discharges and recharges of storage battery charge and discharge protection circuit, has so promptly simplified the system hardware circuit, has also effectively utilized the resource of PIC16F73.Charging has been adopted and has all been filled and two kinds of patterns of floating charge, when charging voltage is higher than protection voltage (2.4V), automatically shuts down charge in batteries; After this fall when safeguarding voltage (2.3V) when voltage, storage battery enters floating charge state, and floating charge is closed after being lower than recovery voltage (2.2V), enters the state that all fills.All fill protection recovery point voltage and floating charge protection recovery point voltage temperature-compensating is all arranged.In order to realize temperature compensation function; as shown in Figure 1; temperature sensing circuit is being set on circuit board; the signal input part of this temperature sensing circuit links to each other with the storage battery that wherein is provided with temperature sensor, and two signal output parts of temperature sensing circuit link to each other with charge protector and discharge prevention control circuit respectively.
As Fig. 5, Fig. 6, shown in Figure 7, air-guiding hole 12 before uniform setting the on the front panel of the utility model inverter casing 6, radiator fan 11 is being set on the rear board of inverter casing 6, the middle part of inverter casing 6 is being horizontally disposed with metal partion (metp) 9, metal partion (metp) 9 is divided into upper and lower two parts with the space in the inverter casing 6, and transformer 10 is being set in this lower space.The circuit board of inverter is divided into 8 two of main circuit board 13 and control circuit boards, the two is an angle of 90 degrees mutually, all is arranged in the inverter casing 6 of metal partion (metp) 9 tops, the uniform from top to bottom side air-guiding hole 7 that is being provided with on the side panel of inverter casing 6, side air-guiding hole 7 is near the front panel of casing 6.Because the utility model casing 6 has adopted the vertical double structural design; according to aerodynamic principle; when overtemperature protection, under fan 11 suction, can either guarantee that air is smooth and easy mobile; reach the cooling recovery point very soon; save the energy, help raising the efficiency, again the effective magnetic field that produced of shielded transformer 10; Electro Magnetic Compatibility is good, and antijamming capability is strong.
Claims (6)
1, a kind of digital control solar photovoltaic inverter, comprise cabinet and be installed in the interior circuit board of cabinet, it is characterized in that: its input is being set on the circuit board, and its output is being connected the charge protector of storage battery with solar cell is continuous, the discharge prevention control circuit and the inverter control circuit that link to each other successively also are being set on the said circuit board, the input of discharge prevention control circuit is connecting storage battery, and the output of inverter control circuit links to each other with load; Inverter control circuit comprises inversion control main circuit and inverter main circuit, wherein the inversion full-bridge circuit of inverter main circuit for adopting the MOSFET power device to constitute.
2, digital control solar photovoltaic inverter according to claim 1 is characterized in that: at the upper and lower side of inversion bridge circuit and be connected to the 1uF surging and absorb electric capacity.
3, digital control solar photovoltaic inverter according to claim 1; it is characterized in that: temperature sensing circuit is being set on circuit board; the signal input part of this temperature sensing circuit links to each other with the storage battery that wherein is provided with temperature sensor, and two signal output parts of temperature sensing circuit link to each other with charge protector and discharge prevention control circuit respectively.
4, digital control solar photovoltaic inverter according to claim 1; it is characterized in that: the electric weight testing circuit is being set on circuit board; the signal input part of this electric weight testing circuit is connecting storage battery, and two outputs of electric weight testing circuit link to each other with charge protector and discharge prevention control circuit respectively.
5, digital control solar photovoltaic inverter according to claim 1 is characterized in that: the current/voltage testing circuit that links to each other, constitutes signal of telecommunication circulation circuit respectively with load with inverter control circuit also is being set on the circuit board.
6, digital control solar photovoltaic inverter according to claim 1, it is characterized in that: air-guiding hole (12) before uniform setting the on the front panel of inverter casing (6), radiator fan (11) is being set on the rear board of inverter casing (6), the middle part of inverter casing (6) is being horizontally disposed with metal partion (metp) (9), metal partion (metp) (9) is divided into the space in the inverter casing (6), following two parts, transformer (10) is being set in this lower space, the circuit board of inverter is divided into (8) two of main circuit board (13) and control circuit boards, the two is an angle of 90 degrees mutually, all be arranged in the inverter casing (6) of metal partion (metp) (9) top, the uniform from top to bottom side air-guiding hole (7) that is being provided with on the side panel of inverter casing (6), side air-guiding hole (7) is near the front panel of casing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200374063U CN2859898Y (en) | 2005-12-16 | 2005-12-16 | Digital photovoltaic de-to-ac converter for controlling solar energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200374063U CN2859898Y (en) | 2005-12-16 | 2005-12-16 | Digital photovoltaic de-to-ac converter for controlling solar energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859898Y true CN2859898Y (en) | 2007-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200374063U Expired - Fee Related CN2859898Y (en) | 2005-12-16 | 2005-12-16 | Digital photovoltaic de-to-ac converter for controlling solar energy |
Country Status (1)
| Country | Link |
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| CN (1) | CN2859898Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710286A (en) * | 2016-12-02 | 2017-05-24 | 安徽波维电子科技有限公司 | Intelligent vehicle monitoring device based on Beidou navigation-GPS (Global Positioning System) |
-
2005
- 2005-12-16 CN CNU2005200374063U patent/CN2859898Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710286A (en) * | 2016-12-02 | 2017-05-24 | 安徽波维电子科技有限公司 | Intelligent vehicle monitoring device based on Beidou navigation-GPS (Global Positioning System) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070117 Termination date: 20111216 |