HYBRID CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a hybrid construction machine improving maintenance property and saving space by connecting a plurality of driver units to a common DC bus while mutually connecting the driver units at low resistance.

SOLUTION: The hybrid construction machine includes an engine, first and second AC electric motors, a battery, and a servo control unit 60 for controlling the first and second AC electric motors and the battery. The servo control unit 60 includes first and second inverter units 63-66 driving respectively the first and second AC electric motors; a step-up/step-down converter unit 62 for performing the charging and discharging of the battery; and a casing 67 for fixing the first and second inverter units and the step-up/step-down converter unit. The input terminals of the converter unit 62 and the first and second inverter units 63-66 are connected to a DC bus composed of a bus bar.

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