Abstract: To provide a hybrid power supply device capable of properly controlling an operation of an engine generator and also preventing the device from increasing in size. The power supply device including an engine generator 11 and a capacitor 15 comprises: a DC bus La having the engine generator 11 and the capacitor 15 connected in parallel and supplying electric power to an outside; a step-up converter 13 provided between the DC bus La and the engine generator 11; and a control section 17 controlling the step-up converter 13 and regulating electric power supplied from the engine generator 11 to the DC bus La. Since both of the engine generator 11 and the capacitor 15 can supply electric power to the outside, the engine generator 11 can be downsized.

Abstract: A disclosed hybrid electric power source device for a crane includes an engine generator, an electric power accumulating unit, and a control unit for controlling the engine generator and the electric power accumulating unit, wherein the control unit includes an electric power load calculating part which acquires electric power loaded on the engine based on required electric power supplied to an outside and charging electric power of an electric power accumulating unit and a command signal sending part which calculates output torque and a revolution speed based on the electric power loaded on the engine calculated by the electric power load calculating part and generates a torque command signal and a revolution speed command signal.

Abstract: To provide a hybrid power supply device capable of properly controlling an operation of an engine generator and also preventing the device from increasing in size. The power supply device including an engine generator 11 and a capacitor 15 comprises: a DC bus La having the engine generator 11 and the capacitor 15 connected in parallel and supplying electric power to an outside; a step-up converter 13 provided between the DC bus La and the engine generator 11; and a control section 17 controlling the step-up converter 13 and regulating electric power supplied from the engine generator 11 to the DC bus La. Since both of the engine generator 11 and the capacitor 15 can supply electric power to the outside, the engine generator 11 can be downsized.