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本文对龙门刨床的可逆调速系统调试中所碰到的几个主要问题作了具体分析。从起动过程或加工过程来看,因刨台正反向运行速度不同,正反组电流调节器的参数以选择不同为好。这样,既可以提高刨台从反向高速换到正向低速时换向的快速性即减小越位,也可以减小反向高速起动和从正向换到反向高速运行时的机械冲击。第二个观点:交流电流检测虽然线路简单,经济,但在零电流检测时不可靠,故在本装置中,又加了直流检测零电流,两者共组成“与门”电路,增加了可靠性。本文还介绍了速度环稳定性的计算方法和突然停电时的制动措施。
This article made a concrete analysis of several major problems encountered in the debugging of the reversing speed regulation system of the planer. From the start-up process or process point of view, due to planing Taiwan positive and negative speed, positive and negative group current regulator parameters to choose different as well. In this way, not only can increase the speed of commutation when the planer is changed from reverse high speed to positive low speed, that is to reduce the offside position, but also can reduce the mechanical impact when reversing high speed starting and changing from forward to reverse high speed running. The second point: AC current detection Although the circuit is simple and economical, but in the zero current detection is not reliable, so in this device, but also added a DC detection of zero current, the two formed a total of “AND gate” circuit, an increase of reliable Sex. This article also describes the calculation of speed loop stability and braking measures during a sudden power outage.