Sandvik Mining and Construction Oy

Sandvik Mining and Construction Lyon Sas

Samuli Verho

Jussi Puura

Harri Vatanen

Mikko Kouvo

Mikko Kitula

Samuli Kouhia

Raimo Juntunen

Tommi Tiihonen

Laurent Demia

Pertti Parkkinen

Pekka Anttonen

Juho Rantanen

Teemu Hongell

Guillaume Naddaf

Annukka Kokkonen

Calixte Blanc-Bernard

Hannu Paukkunen

A method and arrangement are provided for controlling electric current in a tether cable of an electrically driven mining vehicle. An indicator of an equivalent cycle current that flows through said tether cable is determined, and one or more descriptors of an actual state of dynamically changing conditions of the tether cable are obtained. A current limiting value is determined on the basis of the indicator and the descriptors, and a total amount of current is limited that the mining vehicle draws through the tether cable to a value smaller than or equal to the determined current limiting value.

Method and arrangement for controlling electric current in tether cable of mining vehicle

A hydraulic system, working vehicle, and method for producing hydraulic power to a hydraulic system of a working vehicle is provided. The hydraulic system includes a fixed displacement hydraulic pump and a speed and torque controlled electric motor for driving the hydraulic pump. An electric controller is arranged to adjust the speed of the electric motor and to thereby adjust produced hydraulic fluid flow and pressure in the system. Further, there is a bypass flow channel including a throttle element for directing limited continuous discharge fluid flow from the system.

Hydraulic system, working vehicle and method

A hydraulic system, rock drilling rig, and method for limiting the output performance of a hydraulic drilling actuator temporarily under execution of a safety function feature of the hydraulic system. The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circuit of the hydraulic drilling actuator, whereby a restricted magnitude of the fluid flow is produced at a hydraulic pump. This way a restricted operation mode is enabled and is controlled by a control unit.

Hydraulic system with safety mode, rock drilling rig and method

An operating system, rock drilling rig and method for operating an electrically operated rock drilling rig. The operating system includes an electric system connected to an electric supply source and having one or more electric motors controlled by electric control devices. The system further includes a hydraulic system having one or more hydraulic pumps and hydraulic control devices. There are hydraulic tramming actuators connected to closed loop hydraulic circuits and hydraulic drilling actuators connected to either open or closed loop circuits.

Operating system, rock drilling rig and method

A mining vehicle and a method for an energy supply of the mining vehicle is disclosed. The mining vehicle includes at least one mining work device, at least one AC electric motor for powering the at least one mining work device, and an auxiliary energy source. The mining vehicle further includes a power electronics device that is used for supplying reactive current and for charging or discharging the auxiliary energy source. The amount of the reactive current supplied by the power electronics device and the amount of the effective charging current for charging or discharging the auxiliary energy source are controlled such that the maximum value for the current of the supply cable and the maximum value for the current of the power electronics device are not exceeded.

Mining vehicle and method for its energy supply

Growing community of inventors

Tampere, Finland

Samuli Verho