The invention relates to a direct-current
bus connection structure of a three-phase high-
power inverter. In order to solve the problems that the grouping installation of capacitors is not considered in the prior three-phase high-
power inverter and the
ripple current between the capacitors is reduced, the invention provides a direct-current
bus connection structure of the three-phase high-
power inverter, which comprises a direct-current power supply, at least two
capacitor modules and an inverted switching tube module, wherein the
capacitor modules are connected with the inverted switching tube module in parallel, lapped
copper bars with vertical laminated structures are arranged between the two adjacent
capacitor modules and connected in parallel, and the capacitor modules are connected with the direct-current power supply after being connected with the inverted switching tube module in parallel. By adopting the connection, all the capacitor modules can bear the
energy requirement of the entire output power together, and the utilization ratio of the
capacitance is improved; the vertical laminated structures of the
anode and the
cathode copper bars of the capacitor modules, the line impedance and the
stray inductance parameter are minimized so as to reduce the
ripple current between the capacitor modules; and the capacitor modules adopt the independent structural design, thereby facilitating distributed installation and maintenance.