How does an engine excavator work?

In conventional excavators, the engine is able to handle all the power needs of an excavator, including turning. In an engine excavator power train system, mechanical rotational energy is transferred from the diesel engine to the hydraulic pump and converted into hydraulic energy.

How does a Komatsu hybrid excavator work?

In the case of the Komatsu hybrid excavator, the hydraulic motor of the swing part was replaced with an electric swirl motor, and a super capacitor was used as an energy storage device to recover braking energy when turning.

What power source does an electric excavator use?

It is basically assumed that the fuel cell, which is the main power sources of the electric excavator, the battery, and the super capacitor of the energy regeneration system, can cover the power of the existing engine excavator. In particular, the super capacitor is responsible for powering the upper body of the excavator.

What is the optimal control theory of engine excavator power distribution?

The power distribution profile of the fuel cell, battery, and super capacitor was examined with the optimal control theory of the required power profile of an existing engine excavator. The optimal control theory is based on dynamic programming.

What is the power train of electric excavator?

Power train of electric excavator including regeneration system It is basically assumed that the fuel cell, which is the main power sources of the electric excavator, the battery, and the super capacitor of the energy regeneration system, can cover the power of the existing engine excavator.

How does a hydraulic pump work in an excavator?

The hydraulic energy of the hydraulic pump is transferred to the MCV (Main Control Valve) which distributes the power to the excavator attachments such as the bucket, boom, arm, and swing motor, and the hydraulic swing motor receives hydraulic energy through it. The MCV and the hydraulic swing motor are connected by two ports.