The invention relates to a
hybrid operation
machine, which is used for limiting the demagnetizing action of a lifting
electromagnet when a
direct current (DC)
bus or a step-up and step-down converter is abnormal so as to inhibit the damage of the
DC bus or the step-up and step-down converter and improve reliability. The
hybrid operation
machine is an operation
machine comprising a motor-driven electric operation unit and the lifting
electromagnet, and comprises an electric accumulator, the
DC bus, the step-up and step-down converter, a drive control part and an abnormal detection part, wherein
electric power is provided and received between the electric operation unit and the lifting
electromagnet by the electric accumulator; the
DC bus is connected between the electric operation unit and the lifting electromagnet; the step-up and step-down converter is arranged between the DC
bus and the electric accumulator; the drive control part is used for the drive control of the lifting electromagnet; the abnormal detection part detects the
abnormality of the electric accumulator, the DC
bus or the step-up and step-down converter; and when the abnormal detection part detects the
abnormality, the drive control part limits the demagnetizing action of the lifting electromagnet.