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长期以来,制造厂力图简化电铲的电气系统。用交流电动机驱动的电磁离合器简单地代替电动发电机组是一种办法,但是反应较慢,电能消耗也大,不能满足现代电铲的要求。电铲各种驱动所要求的运行特性都是相当严格的,因此对电气系统要做到既安全、有效而又简单,看来几乎是不太可能的了。如果我们以电铲上较为简单的回转驱动为例来研究的话,则很明显,在开始回转时必须加上一个正向(任定的)力矩,此时驱动呈电动机制运行;当要求停止时,必须施加一反向(负的)力矩,整个结
For a long time, the manufacturer sought to simplify the electrical system of the shovel. Using AC motor-driven electromagnetic clutches to simply replace the motor generator is a way, but the response is slow, the power consumption is also large, can not meet the requirements of modern electric shovel. The operating characteristics required for the various drives of the shovel are quite stringent, so it seems almost impossible to make the electrical system safe, efficient and simple. If we take the shovel shovel simpler rotary drive as an example to study, then it is clear that the beginning of the rotation must be coupled with a positive (any given) torque, the drive was electromechanical operation; when asked to stop , An opposite (negative) moment must be applied to the entire knot