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[Concept] Car DC12V DC conversion AC mains AC220V for general electric appliances, is a convenient power converter. ================================= [For use] When they go out in the absence of mains occasions, work or travel to connect the car battery inverter to drive electrical appliances and power tools. ================================= 【Function】 The power inverter can to DC12V convert 220V. It has the following features: 1) Input high voltage, low voltage alarm and protection. 2) overload. 3) the moment the impact of two times the rated power. 4) overload, short circuit protection. ================================= [Works] By high-frequency transformer, low voltage into a DC voltage of about 300V 12V PWM pulse by the CPU microprocessor. 50 Hz AC drive signal output by the CPU to drive the power switch. 220V AC voltage of the output square wave form of the average RMS power tube has conduction conversion. ================================= [Protection function When the battery using the battery, power inverter, the battery voltage falls below 9.5V, the power inverter will automatically shut down to ensure that the car can start properly, the battery will not be damaged. 1) temperature protection. The surface temperature is higher than 70 ℃, and automatic shutdown. 2) high-voltage protection. Input voltage of 16V ± 0.5V 3) Low voltage alarm. The input voltage is 10.5V ± 0.5V 4) Low voltage protection. Input voltage of 10V ± 0.5V ================================= [Craft] -------------- A. SMT chip technology] "SMT" known as the "automatic programming Mounter", "patch" is actually a package of resistive and capacitive components. High precision, small size, high degree of automated processing, component welding reliability, power inverter to achieve the processing of the product by SMT. -------------- Two. [SCM] Any CPU microprocessor to achieve a high and low pressure alarm, protection, and other parameters and functions of the power inverter model called the single-chip type. -------------- 3. [Simulator] By separating the components to achieve the function of various parameters of the power inverter models, called the simulator. -------------- 4. [Output Voltage] The power of the inverter output voltage through their own feedback to confirm the voltage stability. No-load and rated voltage value is less than 10V. -------------- 5 [Security] The power inverter is fully taken into account the use of the external environment, when the overload or short circuit, power inverters will automatically protect shutdown. -------------- 6. Output frequency The power of the inverter output frequency is output AC square wave cycle. Frequency of 50 Hz. The national power standard is 50 Hz. Under normal circumstances, the cycle 20MS, the F = 1 / T = 50HZ. -------------- 7. [Continuous output power The continuous power is the power of the power inverter in normal circumstances, be able to work continuously. -------------- 8. Peak output power Peak power means the power inverter is able to withstand the power of instant boot, usually refers to the type of motor load. When activated, the starting current, instant starting power, known as the peak output power. -------------- 9. Continuous output power with peak output power] Continuous power and peak power because of the significance of expression. Continuous load = current × 220 (AC voltage) Start the load = 2 x power values In general, start-up load of electrical appliances or power tools determines your power converter is the ability to drive it. -------------- 10. Inductive load Under normal circumstances, the general load with inductance parameters of the load, that is in line with the current leads the voltage characteristics of the load to become inductive load. -------------- 12. The capacitive load The general load of the load with capacitance parameters, that is in line with the load voltage leads the current characteristics, known as the capacitive load. -------------- 13. [With inductive load and capacitive load] Different load characteristics. First, select the load must comply with the power rating of the power inverter. As long as meet the conditions of use of the power inverter with capacitive and inductive load effect is the same. -------------- 14. Output waveform and output 220V, voltage] Power inverter output is an analog sine wave, the mains is a true sine wave. -------------- 15. Output waveform and output 220V voltage] 220V power inverter output voltage is exactly the same with the City of voltage. -------------- 16. Power inverter is only applicable to the 11V-15V input DC voltage. -------------- 17. [Above or below the output values ??can be applied and work] Lower than the value of the input power inverter to issue low-voltage alarm, please note that the electricity load. When the input voltage is very low, the power inverter is automatically protected. Higher than the input value, the power inverter will automatically protect when the input voltage is much larger than can damage the power components of the power inverter. -------------- 18. Conversion efficiency The conversion efficiency of the power inverter generally refers to the ratio of the output effective power and input power. Can understand the conversion efficiency as high as possible. -------------- 19. No-load current value] The load current is the power inverter in case of no-load consumption current. -------------- 20. Cooling fan is the role of The power inverter cooling fan from the cooling effect. The side panel fan ventilation to the formation of air convection, so that the power inverter power components in a safe temperature environment. ================================= 【Type】 140W, 450W, 800W, 1200W, 2000W, 3000W, 225W Portable, 400W portable. ================================= The use of safety]. -------------- A. How to choose the right model? The choice of power inverters can be selected according to purpose in your life and work. Such as: 140W power inverter can use a 29 inch color TV and VCD players. 450W power inverter can use the electric tool. 800W power inverter can use to bring a small microwave oven. -------------- 3. The power inverter input power is only from the vehicle stationary or running? The input power can be derived from the vehicle running state, it can be a static state. -------------- 4. If the car is in the stationary state, the ability to use the power inverter work? The input power is from where? Car in the stationary state, you can use the power inverter Driven appliances is lower than 150W can obtain the output power directly from the cigarette lighter socket Use special clips cable car battery for power higher than 150W. -------------- 5 How to determine the power inverter for the power use of time? Supporting the battery and power inverter, generally amps (AH) for the power measurement unit 80AH of battery divided by the electrical power is multiplied by 10, is the power inverter electrical appliances brought the use of time. For example, the TV 100 watts and 80 security ÷ 100 watts x 10 = 8 hours -------------- 6. The surface temperature of the power inverter work? Whether there is a certain security risk? Power inverter maximum power output is not higher than 70 ℃, there will be no security risk. ================================= 【Attention】 Use the power inverter to pay attention to the battery power supply system voltage value, and fine to read the instructions before use. =================================
【Article is excerpted from: Baidu Encyclopedia】 |
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