Sandvik Mining and Construction Oy

Samuli Kouhia

Mikko Kouvo

Jukka Osara

Harri Vatanen

Samuli Verho

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

The mining vehicle has a carriage, driving equipment for moving the carriage, at least one mining work device, an electric motor for supplying power to the mining work device, a connection for supplying electric power to the electric motor from an electrical network of the mine, and an energy source. The electric motor has at least a primary stator winding and a secondary stator winding galvanically isolated from each other. When the mining vehicle is connected to the electrical network of the mine via the primary stator winding, the electric motor is arranged, at least for a period of time, to supply power to the at least one mining work device and, at least for a period of the time, to supply power via the secondary stator winding for charging the energy source. A method for energy supply of a mining vehicle is also provided.

A mining vehicle includes electric components, devices or machines operating at alternating voltage and having a specific nominal voltage. Power is fed to the mining vehicle from an alternating current network with a specific voltage level. The mining vehicle further includes a transformer arranged to transform the voltage level of the alternating current network into the nominal voltage. When a voltage higher than the nominal voltage is fed to the transformer, the transformer lowers this higher voltage to the nominal voltage. When a voltage lower than the nominal voltage is fed to the transformer, the transformer raises the voltage to the nominal voltage. The transformer is arranged to feed the electric component, device or machine both when a voltage lower than the nominal voltage is fed to the transformer and when a voltage higher than the nominal voltage is fed to the transformer.

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Tampere, Finland

Samuli Kouhia