求助：如何用宏定义的线圈加载震荡电流

ruantao1983

我用宏定义一个3D跑道线圈，想在线圈上加载震荡电流，但是创建线圈的时候输入线圈上电流大小的时候只能给以个固定值，该怎么才能加载震荡电流呢？
如果不用宏定义的线圈，做一个跑道型导体加载电流，电流又不能绕着跑道跑，不知道该怎么办，事关毕业问题，请求达人帮忙啊~我的QQ11259290 请求帮助！！！
宏线圈定义的命令：
RACE,0.047,0.020,0.018,24437,0.004,0.006, , , 'coil'
EPLOT   
/VIEW,1,1,1,1   
/ANG,1  
/REP,FAST   
wpoff,0,0,0.009
RACE,0.047,0.020,0.018,24437,0.004,0.006, , , 'coil'
wpoff,0,0,0.009
RACE,0.047,0.020,0.018,24437,0.004,0.006, , , 'coil'
wpoff,0,0,0.009
RACE,0.047,0.020,0.018,24437,0.004,0.006, , , 'coil'
wpoff,0,0,0.009
RACE,0.047,0.020,0.018,24437,0.004,0.006, , , 'coil'