发明授权
- 专利标题: System for writing magnetic scales
- 专利标题(中): 写磁力系统
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申请号: US09936087申请日: 2000-03-03
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公开(公告)号: US06850139B1公开(公告)日: 2005-02-01
- 发明人: Fritz Dettmann , Uwe Loreit , Carsten Möller , Torsten Schönbach
- 申请人: Fritz Dettmann , Uwe Loreit , Carsten Möller , Torsten Schönbach
- 申请人地址: DE Weltzlar
- 专利权人: Imo Institut fur Mikrostrukturtechnologie und Optoelektronik E.V.
- 当前专利权人: Imo Institut fur Mikrostrukturtechnologie und Optoelektronik E.V.
- 当前专利权人地址: DE Weltzlar
- 代理机构: Koda & Androlia
- 优先权: DE19909889 19990306; DE19940164 19990825
- 国际申请: PCTEP00/01859 WO 20000303
- 国际公布: WO0054293 WO 20000914
- 主分类号: G01D5/245
- IPC分类号: G01D5/245 ; H01F13/00
摘要:
The invention relates to a system for pulse magnetizing high-precision magnetic scales. The system comprises a shaped current conductor (1) and a pulse current source (2) that is composed of a capacitor bank (3), a transfer switch (4) and a control unit (5). The compact set-up of the system is the prerequisite for a power circuit that has such a low resistance that the required high pulse currents are obtained at supply voltages of below 60 V. The transfer switch is an H bridge with four switches (7) that contain equal numbers of MOS transistors connected in parallel. The short pulse times that are achieved using the MOS transistors allow the use of shaped current conductors with which magnetized areas can be produced with a very high precision. The inventive system provides a means for saving components, electric power and time by a factor of up to 100.
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