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针对某矿井下大巷主胶带运输系统皮带重载启动、低速验带检修、过载能力和过欠电压及接地保护、多台电机力矩与速度平衡以及液压盘式制动器与变频器工作配合存在的一系列问题,设计了胶带输送机变频调速系统,变频方式靠变频器内部“主-从”功能实现力矩的调节及速度平衡.从传动采用的是闭环力矩控制方式,而主传动则采取闭环速度控制模式.通过将变频调速系统与综保系统相结合构成的变频改造系统应用于常兴煤业主胶带输送机,使该矿原有的三相电机的软启动方式被摒弃,使皮带机加、减速过程平滑,无功冲击过程较小,功率因数较高,设备可以在任意速度下可靠运行,在保持较高的运行效率的同时节省大量电能.
For a major belt conveyor belt conveyor belt heavy load start, low-speed inspection with inspection, overload and over-voltage and ground protection, multi-motor torque and speed balance and hydraulic disc brake and inverter work with the existence of a Series of problems, the design of the belt conveyor frequency control system, the frequency conversion by the inverter " Closed-loop speed control mode.It is applied to the main belt conveyor of Changxing coal-fired coal-fired coal mine through the combination of frequency conversion speed regulation system and comprehensive insurance system to make the soft start mode of the original three-phase motor of this mine abandoned, Machine and deceleration process is smooth, reactive impact process is small, high power factor, the device can run reliably at any speed, while maintaining high operating efficiency while saving a lot of power.