专利名称：POWER MEASUREMENT DEVICE发明人：DIONNE, Donald Jeffrey申请号：EP12744584.9申请日：20120126公开号：EP2673649A1公开日：20131218
摘要：A power measurement device for sampling current or voltage signals of apower system to produce a 1-bit delta-sigma bitstream. The power measurement deviceincludes a frequency locked loop for determining the power system frequency directlyfrom the 1-bit delta-sigma bitstream. The frequency locked loop includes a 1-bit rotateCORDIC that is configured to produce difference signals having a multi-bit word for eachbit of the 1-bit delta-sigma bitstream, and a phase error calculator that determines thedifference between the phase of the power system frequency and a phase ramp
generated from a frequency measurement value in a frequency register. The phase errorcalculator feeds back a phase correction signal to the frequency register to lock thefrequency measurement value to the power system frequency.
申请人：Smart Energy Instruments Inc.
地址：323 Church Street Unit 18 Oakville, Ontario L6J 1P2 CA
国籍：CA
代理机构：Algemeen Octrooi- en Merkenbureau B.V.
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