生产型高梯度磁选机激磁功率大且为大电感性负载，其供电系统输出电流很难稳定。
High Gradient Magnetic Separator for production needs high exciting power and its inductive load is great. The stabilization of output current from power supply system is difficult.
电机传动系统大都采用变频器供电，输出的是非正弦电压、电流，其在电机中产生非正弦磁场。
The motor drive system almost all use inverter supply power, which output non-sinusoidal voltage-current and produce non-sinusoidal electromagnetic field.
输出电流不受供电电压波动的影响，实现了电路的恒流功能。
The output current is never influenced by power supply, realizing the invariableness of load current.
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