Single-phase and three-phase integrated inverter power circuits, power supply equipment and electrified vehicles

Abstract

The invention relates to a single-phase and three-phase integrated inverter power supply circuit, power supply equipment and electrified vehicles. Two capacitor groups connected in series are located at both ends of the DC voltage input side of the three-phase inverter bridge circuit; the LCC circuit includes three groups Sub-LCC circuits with the same structure, each group of sub-LCC circuits includes an inductor, a first capacitor, and a second capacitor; one end of the inductor is connected to the voltage output end of the corresponding bridge arm, and the other end of the inductor is respectively connected to the first capacitor and the second capacitor. One end of the capacitor; the other end of the first capacitor is used to connect the three-phase load and / or single-phase load; the other end of the second capacitor is connected to the common end; wherein, the output voltage of the corresponding sub-LCC circuit is the same as that of the corresponding bridge arm The phases of the output voltage should be consistent; if the LCC circuit is used to connect a single-phase load, the lead wire at the connection of the series connection of the two capacitor banks is used as the neutral line for connecting to the single-phase load. The invention ensures the quality and stability of the power supply.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to single-phase and three-phase integrated inverter power circuits, power supply equipment and electrified vehicles. Background technique [0002] Electrified transportation has been paid attention to and vigorously promoted for its advantages of energy saving, environmental protection, and traffic congestion relief. The electrical loads on vehicles usually include three-phase loads and single-phase loads. In traditional technology, single-phase and three-phase independent inverter power supplies generally use auxiliary inverter power supplies that supply power to single-phase loads and three-phase loads alone, or use dual inverters. Therefore, the circuit structure of the conventional auxiliary inverter power supply is relatively complicated and the cost is relatively high, and it needs to bear greater device stress, resulting in lower system efficiency and reliability....

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