基本信息:
- 专利标题： SELF CALIBRATION BY SIGNAL INJECTION
- 申请号：US16952922 申请日：2020-11-19
- 公开(公告)号：US20210166869A1 公开(公告)日：2021-06-03
- 发明人： Daniel ALJADEFF , Dan WIJSBOOM , Yael ALALI , Adi SHAMIR
- 申请人： Panoramic Power Ltd.
- 申请人地址： IL Kfar-Saba
- 专利权人： Panoramic Power Ltd.
- 当前专利权人： Panoramic Power Ltd.
- 当前专利权人地址： IL Kfar-Saba
- 主分类号： H01F38/30
- IPC分类号： H01F38/30 ; H01F27/28 ; H01F27/24 ; H03M1/12 ; H03M1/66 ; H03H7/06 ; G01R15/18 ; G01R19/18 ; G01R19/22 ; G01R35/00
摘要：
A current transformer (CT) for the purpose of, for example, current measurement, that uses a power line as a first coil and a second coil for measurement purposes, is further equipped with a third coil. Circuitry connected to the third coil is adapted to inject a known reference signal to the third coil of the CT. The injected reference signal, i.e., current, generates signals in the first and second coils of the CT. The signal generated in the second coil is compared using circuitry attached thereto to the reference signal. Based on the results, and the difference between the expected results and the actual results, updated calibration parameters are determined. These provide improved accuracy when using the CT, for example for measurement of the like of current or phase of the primary coil when measurements are adjusted using the newly determined calibration parameters.
公开/授权文献:
- US11538628B2 Self calibration by signal injection 公开/授权日：2022-12-27