发明授权
- 专利标题: Tape tension control for tape recording and/or reproducing system
- 专利标题(中): 磁带记录和/或再现系统的磁带张力控制
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申请号: US856045申请日: 1977-11-30
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公开(公告)号: US4218639A公开(公告)日: 1980-08-19
- 发明人: Isao Sanguu
- 申请人: Isao Sanguu
- 申请人地址: JPX Tokyo
- 专利权人: Nippon Electric Company, Ltd.
- 当前专利权人: Nippon Electric Company, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX51/144206 19761130
- 主分类号: B65H23/02
- IPC分类号: B65H23/02 ; B65H23/18 ; B65H23/182 ; B65H77/00 ; G05D17/00 ; G11B15/43 ; H02P7/282 ; H02P29/00
摘要:
A purely electrical tension control system utilizing the characteristics of a shunt motor coupled with the supply reel. In a recording or reproducing mode, the reel drive motor is forced to rotate in a direction opposite to its normal direction of rotation, thus producing a counter electromotive force and torque for rotation. The counter electromotive force is detected and employed to control the motor torque to thereby maintain a fixed tape tension.
公开/授权文献
- US5802577A Multi-processing cache coherency protocol on a local bus 公开/授权日:1998-09-01