MINING VEHICLE AND METHOD FOR ITS ENERGY SUPPLY

摘要

The invention relates to a mining vehicle and to a method for energy supply of a mining vehicle. The mining vehicle comprises at least one mining work device, at least one three phase AC electric motor for powering the at least mining work device, a three phase connecting device connectable to a supply cable for supplying electric current to the mining vehicle from a supply grid and a current reducer unit for compensating for reactive power. The electric motor is connectable to delta connection and to star connection. The current reducer unit comprises at least three single phase capacitor units that are connectable to delta connection while the motor is connected to delta connection and connectable to star connection while the motor is connected to star connection.