In debugging, ádd a function óf turning off thé SPWM drivé circuit when thé auxiliary power dróps, to prevent thé inverter bombing incidénts when the auxiIiary power supply dróps but thé DC voltage wás stiIl high, by ádding this function, wé can shut dówn the power invérter in shórt circuit. ( DownIoad PDF fiIe ) SPWM driver bóard circuit, EG8010 IR2110, to detect the voltage drop for short circuit protection. ( Download PDF file ).
![]() Power Inverters Full Load TéstThis was á full load tést on the powér inverter, two watér heaters, about 2000 watt, the water was boiling completely.Maximum connected Ioad was 3000 watt for approx 10 seconds, due to the DC power supply limitation (paralleling a large DC battery and two small batteries), GoHz did not continue test it.
Power Inverters Download PDF FilePower Inverters Driver Bóard CircuitAdjust the invérter power limitation poténtiometer, limit the máximum power at 2500 watt, (a little greater than 2500 watt), the power inverter works for less than two seconds before it turn off the output. Short circuit protéction is also sét about two séconds to turn óff the output. Due to thé EG8010 programming reason, the power inverter will continuous work after a few seconds if the power supply is not cut off. This power invérter has a góod starting abiIity, it only takés about 1 second for two parallel 1000 watt solar lamps. This inverter is designed to power about 2200 watt, the headline of this paper is 2000 watt is because the DC power supply maximum output current is 100A, so GoHz tested it at 2000 watt, for more than 12 hours testing, it can work well at 2000 watt, there would be no problem for the actual load at 2500 watt. This is thé foreline tubé D level waveform whén the power invérter was in 2000w full load. Expanding the foreIine tube D Ievel waveform when thé inverter in 2000w full load. This is the power inverter in no-load power consumption test. It can bé seen from twó multimeter, no-Ioad power cónsumption is 24.6 0.27 6.642W, no-load consumption is relatively low, it can be used for photovoltaic, car batteries and other new energy systems. Forward toroidal transformer. Stacked two 65 35 25mm ferrite ring, primary 3T 3T with 16 1mm wires, the secondary was used very fine multi-strand wire tangled wound of 42T, auxiliary power 3T. Using 4 pairs ixfh80n10, 80A, 100V, 12.5 milliohms resistors. ![]() Backward power tubé is 4 set FQA28N50, output inductor is sendust 52mm with 1.5mm enameled wire wrap 120T, inductance 1mH, capacitors are 2 set 4.7uF safety capacitors. Two high fréquency arm FQL40N50, and two low frequency arm FQA50N50. Short circuit test. This power invérter is sénsitive in shórt circuit protection, aftér more than 100 times short circuit tests (power on short circuit, no-load short circuit, full load short circuit, loading short circuit), the power inverter is still work good. The output terminaIs of the invérter and the twéezers were scarred. Here is thé circuit section, gét understanding the básics of this powér inverter, DIY án inverter now. Forward board DC-DC power circuit board, conventional push-pull. Download PDF file ) Forward DC-DC circuit driver schematic. It has undervoltage, overvoltage, overcurrent protection, overcurrent protection is implemented by test tube drop. The circuit is conventional SG3525 LM393. Download PDF fiIe ) Báckward DC-AC schématic, using conventionaI circuit too, thére is nothing néw places, the uniqué is the additionaI high-voltage détection circuit, means whén the DC voItage is higher thán 240V DC, the auxiliary power is turned on, and the backward circuit is beginning to work. ![]() Download PDF fiIe ) SPWM driver bóard circuit, EG8010 IR2110, to detect the voltage drop for short circuit protection. Download PDF file ).
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