CN202949376U - Photovoltaic lighting inverter control device - Google Patents
Photovoltaic lighting inverter control device Download PDFInfo
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- CN202949376U CN202949376U CN 201220704779 CN201220704779U CN202949376U CN 202949376 U CN202949376 U CN 202949376U CN 201220704779 CN201220704779 CN 201220704779 CN 201220704779 U CN201220704779 U CN 201220704779U CN 202949376 U CN202949376 U CN 202949376U
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- pulse width
- inverter circuit
- signal generator
- width modulation
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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
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Abstract
本实用新型公开了一种光伏照明逆变控制装置，其特征在于，包括：电源、脉冲宽度调制信号发生器、采样器、过零比较器和逆变电路，所述电源与所述脉冲宽度调制信号发生器连接以为其提供稳定的工作电压，该脉冲宽度调制信号发生器的输出端与所述逆变电路的输入端连接，所述逆变电路的输出端分别连接所述采样器的输入端和所述过零比较器的输入端，所述采样器的输出端和所述过零比较器的输出端分别连接所述脉冲宽度调制信号发生器的相应输入端。
The utility model discloses a photovoltaic lighting inverter control device, which is characterized in that it comprises: a power supply, a pulse width modulation signal generator, a sampler, a zero-crossing comparator and an inverter circuit, the power supply and the pulse width modulation The signal generator is connected to provide a stable working voltage, the output end of the pulse width modulation signal generator is connected to the input end of the inverter circuit, and the output end of the inverter circuit is respectively connected to the input end of the sampler and the input end of the zero-crossing comparator, the output end of the sampler and the output end of the zero-crossing comparator are respectively connected to corresponding input ends of the pulse width modulation signal generator.
Description
Technical field
The utility model relates to a kind of photovoltaic illumination inversion control device.
Background technology
Along with the continuing to increase of world population, rapid development of economy, the energy demand total amount in the world also increases just with surprising rapidity comprehensively, and traditional fossil energy is just increasingly exhausted, and energy crisis is presented in face of people.The series of problems such as the significant wastage uncontrolled due to the mankind, that irrational fossil energy consumption has brought resource and the deterioration of the ecological environment, oneself becomes the significant problem that threatens human survival.In the face of resource and the shortage of the energy and the biological environment that goes from bad to worse, countries in the world clearly recognize, the mankind should reduce exploitation and the utilization to non-renewable energy resources such as coal, oil as far as possible, greatly develop the regenerative resource of cleaning.Clean energy resource mainly contains solar energy, geothermal energy, wind energy, biological energy source etc.Wherein, solar energy is topmost renewable and clean energy resource, more and more is subject to concern and the attention of various countries with its spatter property, recyclability, distribution on global generality, utilizes the photovoltaic conversion power generation to have vast potential for future development.
Under whole world environmental protection and energy-conservation overall situation, because consuming, illumination accounts for 12% of whole power consumption, and street lighting is the key areas in general illumination, traditional street lighting adopts the local power grid power supply, consume a large amount of electric energy, and adopt the solar energy power generating lighting technology to be with a wide range of applications.
The utility model content
the utility model provides a kind of photovoltaic illumination inversion control device, it is characterized in that, comprise: power supply, the pulse width modulating signal generator, sampler, zero-crossing comparator and inverter circuit, described power supply is connected with described pulse width modulating signal generator thinks that it provides stable operating voltage, the output of this pulse width modulating signal generator is connected with the input of described inverter circuit, the output of described inverter circuit connects respectively the input of described sampler and the input of described zero-crossing comparator, the output of described sampler be connected the output of zero-crossing comparator and connect respectively the respective input of described pulse width modulating signal generator, wherein said sampler is exported to described pulse width modulating signal generator for the alternating voltage of the described inverter circuit output of sampling and ac voltage and the alternating current flow valuve that alternating current also will be sampled, described zero-crossing comparator is used for the ac voltage signal of described inverter circuit output is carried out zero passage detection, obtains with the ac voltage signal of described output with the square-wave signal of homophase frequently and outputs it to described pulse width modulating signal generator, described pulse width modulating signal generator is according to the ac voltage of the described sampling that receives and alternating current flow valuve and the described square-wave signal that receives, and the pulse width modulating signal of output through regulating given described inverter circuit.
It is the efficient of alternating current that photovoltaic illumination inversion control device of the present utility model can improve dc inverter, greatly reduces power consumption.
Control DC power supply with photovoltaic illumination inversion control device of the present utility model, storage battery for example, when illumination was sufficient, solar panel was charge in batteries; At night, the dc inverter of storage battery being exported by photovoltaic illumination inversion control device of the present utility model is alternating current, for street lighting, greatly reduces power consumption.Owing to adopting the solar energy clean energy resource, reduced environmental pollution, have important economic and social benefit.
Description of drawings
Fig. 1 is the schematic block diagram of photovoltaic illumination inversion control device of the present utility model;
Fig. 2 is the schematic block diagram of the inverter circuit in photovoltaic illumination inversion control device of the present utility model.
Embodiment
Fig. 1 is the schematic block diagram of photovoltaic illumination inversion control device of the present utility model, as shown in Figure 1, photovoltaic illumination inversion control device of the present utility model comprises: power supply, pulse width modulation (PWM) signal generator, sampler, zero-crossing comparator and inverter circuit, described power supply is connected with described pwm signal generator thinks that it provides stable operating voltage, the output of this pwm signal generator is connected with the input of described inverter circuit, the output of described inverter circuit connects respectively the input of described sampler and the input of described zero-crossing comparator, the output of described sampler be connected the output of zero-crossing comparator and connect respectively the respective input of described pwm signal generator.
Described sampler is exported to described pwm signal generator for the alternating voltage of the described inverter circuit output of sampling and ac voltage and the alternating current flow valuve that alternating current also will be sampled.
Described zero-crossing comparator is used for the ac voltage signal of described inverter circuit output is carried out zero passage detection, obtains with the ac voltage signal of described output with the square-wave signal of homophase frequently and outputs it to described pwm signal generator.The waveform of the alternating current of described inverter circuit output is sinusoidal wave, when waveform is input to zero-crossing comparator for sinusoidal wave voltage signal, when the sine waveform of input be during greater than zero the first half, the output of this zero-crossing comparator is high level, here be for example 3.3V, when the sine waveform of input was minus the latter half, the output of this zero-crossing comparator was low level, is for example 0V here.At this moment, the output signal of this zero-crossing comparator is and the same square-wave signal of homophase frequently of the ac voltage signal of described output.
Described pwm signal generator is used for output pulse width modulation (PWM) signal to described inverter circuit.Described pwm signal generator is according to the ac voltage of the described sampling that receives and alternating current flow valuve and the described square-wave signal that receives, and the pulse width modulating signal of output through regulating given described inverter circuit.
Particularly, described pwm signal generator receives from ac voltage and the alternating current flow valuve (being analog signal) of described sampler and is converted into corresponding digital signal, and this magnitude of voltage and current value are compared with load voltage value and the load current value of load respectively.When the magnitude of voltage of sampling and one of current value or this both more than or equal to corresponding rated value 15% the time, the pwm signal that described pwm signal generator output duty cycle reduces is given described inverter circuit, so that alternating voltage and/or the alternating current of described inverter circuit output reduce, so that equal or substantially equal load voltage value and/or the load current value of load; When the magnitude of voltage of sampling and one of current value or this both less than corresponding rated value 15% the time, the pwm signal of described pwm signal generator output duty cycle increase is given described inverter circuit, so that the alternating voltage of described inverter circuit output and/or alternating current increase, so that equal or substantially equal load voltage value and/or the load current value of load.Here, described load is illuminating lamp.
Described pwm signal generator is also by receiving the frequency of identifying the alternating current of described inverter circuit output from the square-wave signal of described zero-crossing comparator output.For example, two adjacent rising edge signals of the square-wave signal that described pwm signal generator can receive by detection, then the counter of section incorporated therein is identified the frequency of this square wave signal.For example, at the numerical value of the moment of these two adjacent rising edges difference read-out counter, its difference is the cycle of square-wave signal.Due to the square-wave signal of described zero-crossing comparator output and the same homophase frequently of ac voltage signal of described inverter circuit output, so the cycle of this square wave signal of identifying is the cycle of the alternating current that is also described inverter circuit output, this has also just obtained the frequency of the alternating current of described inverter circuit output.When the frequency of the alternating current of the described inverter circuit output that detects is not rated frequency, described pwm signal generator is adjusted the frequency of output pwm signal, thereby changes the frequency of the alternating current of described inverter circuit output, makes it finally be locked as rated frequency.Here rated frequency is 50Hz.
Above-mentioned inverter circuit can design different circuit structures according to the actual requirements.
Fig. 2 has schematically shown an example of the inverter circuit in photovoltaic illumination inversion control device of the present utility model.As shown in Figure 2, inverter circuit of the present utility model comprises two half-bridge converters that are comprised of two pairs of insulated gate bipolar transistors (IGBT) respectively, and the filter circuit that is comprised of inductor and capacitor.Particularly, an IGBT1, the 2nd IGBT2, the first diode 3 and the second diode 4 form a half-bridge converter, and the first diode 3 and the second diode 4 are fly-wheel diode; The 3rd IGBT5, the 4th IGBT6, the 3rd diode 7 and the 4th diode 8 form another half-bridge converter, and the 3rd diode 7 and the 4th diode 8 are fly-wheel diode; Inductor 9 and capacitor 10 form described filter circuit.
The pwm signal of described pwm signal generator output directly drives IGBT, makes two half-bridge converter alternate conduction that are comprised of two couples of IGBT, and phase difference is 180 °, thus the sine wave of output same frequency.And the harmonic wave in the electric current of described filter circuit filtering half-bridge converter output has improved the quality of the alternating current of output.
It is the efficient of alternating current that photovoltaic illumination inversion control device of the present utility model can improve dc inverter, greatly reduces power consumption.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220704779 CN202949376U (en) | 2012-12-18 | 2012-12-18 | Photovoltaic lighting inverter control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220704779 CN202949376U (en) | 2012-12-18 | 2012-12-18 | Photovoltaic lighting inverter control device |
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| Publication Number | Publication Date |
|---|---|
| CN202949376U true CN202949376U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220704779 Expired - Fee Related CN202949376U (en) | 2012-12-18 | 2012-12-18 | Photovoltaic lighting inverter control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276212A (en) * | 2020-01-17 | 2020-06-12 | 卫莱医疗有限公司 | Massager Kit |
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2012
- 2012-12-18 CN CN 201220704779 patent/CN202949376U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276212A (en) * | 2020-01-17 | 2020-06-12 | 卫莱医疗有限公司 | Massager Kit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20191218 |