Design of eddy current brake control systems with power off protective circuits
Baocheng Zhang · Oil Field Equipment · 2004
This paper discusses the problem of existing protect circuit at the time of eddy current brake power off, introducing new thought and circuit of protect circuit for eddy current brake. Not only AC power off need protection ,but also for any out of control caused by any problems, including AC power power transformer,fuse,commutate circurt,fire circuit,control circuit,driller’s control,coil,power cable and control cable.