| 摘要 |
<p>PURPOSE: An advanced circuit arrangement of transformerless 1 phase PV inverter is provided to have simple switching arrangement with high efficiency and lower number of several items by providing practical solutions. CONSTITUTION: An advanced circuit arrangement of transformerless 1 phase PV inverter connects AC output to a common grid(U) through two reactors(L1,L2). When four diodes form a diode bridge and the minus node of the diode bridge is connected to the collector of a transistor and anode of the diode(D5), AC node of another half bridge(20) is connected to anode of diode(D3) of AC node and the cathode of a diode(D2).The half bridge has a feature that AC node of a half bridge(10) is connected to the anode of the diode and cathode of diode. Like a method that plus and minus terminals of energy storing capacitor(C) which generates the bridge are connected with two half bridges, the energy storing capacitor is connected to the terminal of PV array(P). When the minus node of the diode bridge is connected to a transistor emitter and the cathode of the diode(D6), the cathode of the diode is connected to the minus terminal of the energy storing capacitor and the anode of the diode is connected to the minus terminal of the energy storing capacitor.</p> |
