公开(公告)号：US4720661A

公开(公告)日：1988-01-19

申请号：US776971

申请日：1985-09-12

申请人： Toshiro Kisakibaru ,  Tsuguo Gotoh ,  Kazunori Ohuchi ,  Hirosuke Ohho

发明人： Toshiro Kisakibaru ,  Tsuguo Gotoh ,  Kazunori Ohuchi ,  Hirosuke Ohho

IPC分类号： H02P27/06 ,  B65H23/195 ,  B65H23/198 ,  B65H59/38 ,  H02P7/298 ,  H02P7/06

CPC分类号： B65H23/1955

摘要： Hitherto, in the tension control for a reel, it has been impossible to exceed the tension controlling range of about 1:10 which is determined by the tension controlling range of a single DC motor, so that for the reel which requires a tension controlling range over 1:10, a plurality of DC motors have been combined and used or the gear ratio between the reel and the DC motor has been changed to date.In this invention, attention is paid to the fact that undesirable phenomena such as a change in characteristic due to an armature reaction, and deterioration of rectification which are caused by setting the field system to a low level can be sufficiently suppressed by limiting the setting and controlling range to the low region of an armature current. The field system is set to a low level so that the ratio of the field magnetic flux to the diameter of the coil becomes a value lower than the maximum value and also so that the upper limit of the operating armature current which is practically applied is set low, thereby making it possible to perform stable tension control within a low tension range which has not been possible heretofore by a single DC motor.

摘要翻译： PCT No.PCT / JP85 / 00012 Sec。 371日期：1985年9月12日 102（e）1985年9月12日PCT PCT 1月14日，PCT PCT。 第WO85 / 03061号公报 1985年7月18日。迄今为止，在卷轴的张力控制中，不可能超过由单个DC电机的张力控制范围确定的约1:10的张力控制范围，使得对于 卷筒需要1：10以上的张力控制范围，已经组合使用多个直流电动机，或者直到现在已经改变了卷轴和直流电动机之间的传动比。 在本发明中，注意到通过限制设定和充分的抑制来充分地抑制诸如由于电枢反应引起的特性变化和整流的恶化等不良现象， 控制到电枢电流低区域的范围。 励磁系统设定为低电平，使得励磁磁通与线圈直径的比值成为低于最大值的值，并且使得实际应用的工作电枢电流的上限被设定 低，从而可以在单个DC电动机以前无法实现的低张力范围内进行稳定的张力控制。