专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4118658A Control circuit for shuttle car 失效
标题翻译：班车控制电路
公开(公告)号：US4118658A
公开(公告)日：1978-10-03
申请号：US790304
申请日：1977-04-25
申请人： John P. Salva , Gregory M. Mudzinski , John A. Mills , Shashi B. Dewan
发明人： John P. Salva , Gregory M. Mudzinski , John A. Mills , Shashi B. Dewan
IPC分类号： H02P7/00 , H02P7/29 , H02M7/68
CPC分类号： H02P7/29 , H02P7/05
摘要： A control circuit for use with a shuttle car used in mining operations and circuitry associated therewith. The control circuit generally comprises a chopper circuit in series with a reversing circuit and a traction motor which drives the shuttle car. The chopper circuit essentially comprises two separate current paths each through a separate set of silicon controlled rectifiers or SCRs and a common capacitor. A logic circuit controlled by the operator alternately gates the sets of SCRs thereby placing voltage across the traction motor. The magnitude of this voltage and hence the speed of the motor are directly proportional to the frequency of the gating pulses. The reversing section also employs two sets of SCRs and a common field inductance. The operator, through the logic circuit, triggers one set of SCRs and current flows through the field inductance in a forward direction causing the traction motor to operate in a forward mode. When the second set of SCRs are triggered, the current through the field inductance is reversed, and accordingly, the current through the motor will also be reversed causing it to reverse direction. Consequently, the chopper circuit controls the car's speed while the reversing circuit controls its direction. The control circuit is also provided with a power circuit which creates the voltage for the logic circuit as well as a pump motor circuit which controls the car's hydraulics and a conveyor motor circuit which controls the loading and unloading functions.
摘要翻译：用于采矿作业中使用的穿梭车和与其相关的电路的控制电路。控制电路通常包括与反转电路串联的斩波电路和驱动梭车的牵引电动机。斩波电路基本上包括两个单独的电流路径，每个电流路径分别通过一组单独的可控硅整流器或SCR和公共电容器。由操作者控制的逻辑电路交替地浇注SCR组，从而将电压跨越牵引电动机。该电压的大小以及因此电动机的速度与门控脉冲的频率成正比。反向部分还采用两组SCR和一个公共场电感。操作员通过逻辑电路触发一组SCR和电流在正向上穿过励磁电感，使牵引电动机以正向模式工作。当第二组SCR被触发时，通过场电感的电流反转，因此，通过电动机的电流也将反转，使其反向。因此，当逆变电路控制其方向时，斩波电路控制汽车的速度。该控制电路还具有电源电路，其产生用于逻辑电路的电压以及控制汽车液压的泵电机电路和控制加载和卸载功能的输送机电机电路。

IPRDB

热门服务

关于我们

友情链接

联系方式