We will attend 117th The Chiness Export Commodities Fair (Canton Fair) from April 15th~19th ,Welcome to visit us for further business . We will show our newest UPS (modular ups )and solar inverter there ,and will have some gifts for you Date: April 15 to 19 Booth No: Hall 10.3,K30 See you at Canton Fair 2015,Guangzhou, China
The main task of the solar inverter heat radiation system is to select a reasonable heat dissipation and cooling method, to control the temperature of the electronic components under the specified value, to provide a low heat resistance channel between the heat source and the external environment, so as to ensure that the heat can be sent out smoothly.
To design the heat dissipation system, the heat of the inverter must first be calculated. The main heat generating devices of the inverter are the power switch tube and the filter inductor, and the transformer. The efficiency of transformers and inductors can be customized by consultation with manufacturers. The loss of the power switch tube can be calculated by software simulation. The loss is related to the output current, the DC voltage, the power factor, the overload coefficient, the modulation coefficient and the output frequency.
(2)Selection of heat dissipation method
The thermal design of electronic equipment should begin with the method of determining the cooling method of the equipment. The selection of cooling methods should be based on the heat flow density, temperature rise requirements, reliability requirements as well as the size, weight, economy and safety, and choose the simplest and effective cooling method. Heat sink is added to forced air cooling according to heat flux and temperature rise. The forced air cooling is reliable, easy to maintain, and relatively low in cost. It is a better cooling method, so it is widely used in the cooling system of electronic equipment which needs heat dissipation, and it is also the main cooling form of high power devices.
(3)Thermal design steps
The design of forced air-cooled heat sink with radiator is very complicated. Here are the basic methods and steps for this relatively complicated situation.
A.Considering the factors such as equipment structure, wind pressure, cost and heat dissipation efficiency, combined with the simulation results of thermal simulation software, determine the structural parameters of the radiator.
B.According to the heat balance equation, the fan is initially determined by calorific value.
C.The thermal design of the whole machine is accomplished by using a fan and designing a reasonable air duct.
D.The thermal simulation software is used to simulate the thermal design. If the final component temperature exceeds the allowable value, then the structural parameters of the radiator need to be adjusted, and the fan need to be reselected and the above steps are repeated. The final design makes the device temperature below the allowable value and achieves the optimization of the heat dissipation system.
The design of the radiator should take into account the structural requirements, cost, wind pressure, heat dissipation efficiency and processing technology of the electronic equipment. The fin of radiator is suitable for thin, but too thin is difficult to process.When the radiator size is fixed, the smaller the fin spacing is, the smaller the thermal resistance. However, if the spacing is too small, the wind resistance will be increased, and the heat dissipation will be affected. Increasing the fin height can increase the heat dissipation area, that is, increase the heat dissipation. However, for the straight rib of the same section, the heat transfer will no longer increase after the height of the rib is increased to a certain extent. If the ribs are further increased, the efficiency of the ribs will decrease sharply and the wind resistance will be increased.
(5)Air duct design for the whole machine
The basic principles for the design of the wind tunnel are as follows.
A.The air flow and flow rate through the fin of the radiator should be increased as far as possible, so as to improve the heat dissipation effect.
B.It is necessary to reduce windage resistance to prevent excessive pressure loss.
C.The outlet air duct should also ensure that the heat flow can be discharged smoothly.
(6)Thermal design simulation
The software can simulate the thermal status of the system more accurately, and the working temperature of each component can be predicted in the design process. This can correct unreasonable layout and achieve a good layout, thereby shortening the development cycle of the design, reducing the cost and improving the success rate of the product. The heat of the electronic equipment can be effectively controlled, so that it can work within the specified temperature limit, thus improving the reliability of electronic equipment.
■Pure sine wave output
■Self-consumption and Feed-in to the grid
■Programmable supply priority for PV, Battery or Grid
■User-adjustable charging current and voltage
■Monitoring software for real-time status display and control
■Parallel operation up to 6 units only for 3K/4K/5K models
■Programmable multiple operation modes: Grid-tie,off-grid and grid-tie with backup
On Off Grid Hybrid Solar Power Inverter with battery pack,high frequency pure sine wave output, PF.=1.0, parallel working Max 6units(30KW) – SSP3119C 3-5KVA
1.Before using the power supply, make sure whether the input and output voltage specifications are consistent with the nominal values of the power supply.
2.Before electrifying, check if the input and output leads are connected correctly, so as not to damage user equipment.
3.Check whether the installation is solid, whether there is contact between the installation screws and the power supply devices, and measure the insulation resistance of the housing and input and output, so as to avoid electric shock.
4.In order to ensure safety and reduce interference, ensure that the grounding terminal is reliably grounded.
5.The output power is usually divided into main and auxiliary output, and the main output characteristic is superior to the auxiliary output. In general, the output current is large and the output is mainly. In order to guarantee the output load adjustment rate and output dynamic performance, it is generally required to carry at least 10% load per route. If the auxiliary road does not use the main road, the main road must add proper false loads. Refer to the specification of the corresponding model.
6.Please note that power frequent switch will affect its life.
7.The working environment and the degree of load will also affect their life.
1.Constructed with standard 19 inch screen, which has the advantage of wide use.
2.The data center area and the installation cost can be saved due to its small size and the embedded installation.
3.Wide input voltage range (85-290Vac), the power grid is adaptable.
4.Perfect lightning protection.
5.Rectifiers are hot-pluggable. Easy and quick on line maintenance.
6.The rectifier uses DSP (Digital Signaling Processor) ology, makes the power density ran up to 14W/In3.
7.Battery management, prolongs the life of the battery well.
8.Have passed CE, UL, TLC, and other related certifications.
9.Excellent energy conservation and environmental protection.
Low temperature will bring changes in physical properties of electronic components, and this change tends to be in an unfavorable direction. Blizzard has a great impact on photovoltaic power stations. Too thick snow will lead to over icing of components, affecting the power generation and life of the system, resulting in a decline in power generation and even stop work. For solar inverter, it is a severe test. Cold climate conditions may make the inverter can not work steadily, such as can not start, frequent alarm, power generation reduction and other problems.
How to choose inverter to deal with the erosion of extreme weather?
1.Select components of wide range of working temperature to fully meet the low temperature service conditions.
2.Takes full account of the demand for low temperature work in the design of the product, leaving enough margin (including capacity margin and time margin).
3.The product should be tested for a long time at low temperature to ensure the validation of theoretical value.
After long time use, there will be aging phenomenon in the connection of inverter.The inverter has its own insulation impedance detection, which can reliably protect the inverter. At the same time, it needs to pass the on-site inspection, and the thermal imager can scan the connection points of each cable at work; Check whether the inverter PV input terminal is stable or loose; Whether the AC terminal is aging and loosening; Whether there is grounding in the PV line under the sun plate.
1.Touch screen display.
2.Output power factor PF=1.0.
3.On + Off Grid with energy storage.
4.Energy generated record, load record, history information and fault record.
5.Connected with battery optional.
6.Wide PV Input Range.
The leakage current of the solar power system, also known as the square array residual current, is essentially common mode current, which is caused by the existence of parasitic capacitance between the solar power system and the earth. When the parasitic capacitance, and solar power system and the power grid forms a loop, the common mode voltage will produce common mode current on the parasitic capacitance. When the low frequency transformer is installed in the solar power system, the parasitic capacitance impedance of the transformer windings in the loop is relatively large, so the common mode current produced by the loop voltage of the CCP can be restrained. However, in a solar power system without transformer, the circuit impedance is relatively small, and the common mode voltage will form a larger common mode current on the parasitic capacitance between the solar power system and the earth, that is, leakage current.
The leakage current in the solar power system includes the DC and AC parts. If connect to the grid, the problems of the grid current distortion and electromagnetic interference will be caused, which will affect the operation of the equipment in the power grid. Leakage current may also cause the solar inverter enclosure to be electrified, which will pose a threat to personal safety.
1.Pure sine wave inverter
2.Built-in MPPT solar charge controller
3.Could be built-in battery
5.Configurable input voltage range for home appliances and personal computers via LCD setting
6.Configurable AC/Solar Charger priority via LCD setting
7.Compatible to mains voltage or generator power
8.Auto restart while AC is recovering
9.Overload/Over temperature/short circuit protection
10.Configurable battery charging current based on applications via LCD setting
The leakage current of the solar power system is essentially common mode current, which is caused by the existence of parasitic capacitance between the photovoltaic system and the earth. When the parasitic capacitance – photovoltaic system – power grid three forms a loop, the common mode voltage will produce common mode current on the parasitic capacitance. When the power frequency transformer is installed in the photovoltaic system, the parasitic capacitance impedance of the transformer windings in the loop is relatively large, so the common mode current produced by the loop voltage of the CCP can be restrained. However, in a photovoltaic system without transformer, the circuit impedance is relatively small, and the common mode voltage will form a larger common mode current on the parasitic capacitance between the photovoltaic system and the earth, that is, leakage current.
The leakage current in the photovoltaic system includes the DC and AC parts. If the grid is connected to the grid, the problems of the grid current distortion and electromagnetic interference will be caused, which will affect the operation of the equipment in the power grid. Leakage current may also cause the inverter housing to be electrified, which will pose a threat to personal safety.
1.Built-in PWM solar charge controller.
2.Modified sine wave output.
3.High frequency design.
4.Optional input voltage range.
5.Full automatic and silent operation.
7.Auto change AC-DC.
10.Three-steps intelligent charging control to recharging.
11.LCD display, audible and visual alarm.
12.Mains/solar output priority level for the customer to choose .
13.Mains/solar/ mains & solar charging three mode of prioritiesfor the customer to choose.
14.Built-in with 10 or 20 Amp charger for up to 200Ah battery.