This paper describes the business 6kV power supply, short-circuit capacity in the grid smaller and larger capacity hub motor controller case, the choice of starting the program, starting the design calculations, analysis and identification, and start driving in the actual assessment and other data.
Many of China’s mining industry is the use of the power supply system voltage 6kV power distribution, power line in the 6kV power distribution, electrical equipment if there is a large capacity (2000kV more) hub motor controller, the motor starting process, the voltage will produce greater volatility, will directly affect the quality of power supply and electric power line the normal operation of other electrical equipment and service life, this is not an option. To solve this problem, the design of the electric motor often used to reduce the voltage of the way start. Therefore, in the design, must be based on network conditions, starting large hub motor controller for starting the calculation, verification, select the correct start method and reasonable starting equipment.
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