HYBRID TYPE CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a hybrid type construction machine capable of promptly stopping a revolving body by a stop operation in a normal construction machine even when the revolving body makes a movement unwanted by an operator for some reasons.

SOLUTION: The hybrid type construction machine includes: an inverter controller 60 for outputting PWM signals to an inverter 52 and controlling the number of revolution of an electric motor 25; a first electric circuit having interruption means 302 for interrupting the PWM signals outputted from the inverter controller 60 to the inverter 52 corresponding to the operation of either one of the immobility selection of a gate lock lever switch 109 and the off selection of an ignition switch 110; and a second electric circuit having a solenoid valve 102 for a revolving brake for operating a revolving brake 101 corresponding to the operation of either one of the immobility selection of the gate lock lever switch 109 and the off selection of the ignition switch 110.

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