公开(公告)号：US08373998B2

公开(公告)日：2013-02-12

申请号：US12892306

申请日：2010-09-28

申请人： Marc A. Ricci ,  Jonathan Knoll

发明人： Marc A. Ricci ,  Jonathan Knoll

IPC分类号： H05K7/14 ,  H05K7/18

CPC分类号： H05K1/0218 ,  G01R22/065 ,  H05K3/303 ,  H05K9/0022 ,  Y02P70/613

摘要： A shield that protects high-value input resistors in a power meter against unwanted effects due to electromagnetic interference from a nearby power supply and/or due to crosstalk from adjacent phases. The shield includes multiple printed circuit board shields that are arranged between each of the input resistors on a main printed circuit board in the power meter. Each PCB shield has a conductive layer that provides the shielding against unwanted energy. The resistors are arranged in a diagonal or parallel manner between each pair of PCB shields to prevent the resistor from movement, which prevents pin fatigue and fixes the value of the parasitic capacitance that is produced in the resistor-PCB-shield combination. In another configuration, the PCB shield is made of a flexible material, and snakes between and over the top or around the side ends of each resistor in a serpentine fashion, protecting the resistors from unwanted energies from both the top and the sides. The PCB shields disclosed herein eliminate variations in the percent error of the measurement phases, which contributes to achieving a highly accurate meter with an overall accuracy of less than 0.1%.

摘要翻译： 保护功率计中的高价值输入电阻，防止来自附近电源的电磁干扰和/或相邻相位的串扰造成的不必要的影响。 该屏蔽包括布置在功率计中的主印刷电路板上的每个输入电阻之间的多个印刷电路板屏蔽。 每个PCB屏蔽件具有导电层，其提供防止不需要的能量的屏蔽。 电阻器以对角或平行的方式布置在每对PCB屏蔽之间，以防止电阻器移动，这防止了引脚疲劳并固定了电阻器 - PCB-屏蔽组合中产生的寄生电容的值。 在另一种配置中，PCB屏蔽由柔性材料制成，并以蛇形方式在每个电阻器的顶部或周围的蛇舌之间和之上蛇形，从而保护电阻器免受顶部和侧面的不必要的能量的影响。 本文公开的PCB屏蔽消除了测量阶段的百分比误差的变化，这有助于实现具有小于0.1％的总精度的高精度仪表。

公开(公告)号：US20120075827A1

公开(公告)日：2012-03-29

申请号：US12892306

申请日：2010-09-28

申请人： Marc A. Ricci ,  Jonathan Knoll

发明人： Marc A. Ricci ,  Jonathan Knoll

IPC分类号： H05K9/00

CPC分类号： H05K1/0218 ,  G01R22/065 ,  H05K3/303 ,  H05K9/0022 ,  Y02P70/613

摘要： A shield that protects high-value input resistors in a power meter against unwanted effects due to electromagnetic interference from a nearby power supply and/or due to crosstalk from adjacent phases. The shield includes multiple printed circuit board shields that are arranged between each of the input resistors on a main printed circuit board in the power meter. Each PCB shield has a conductive layer that provides the shielding against unwanted energy. The resistors are arranged in a diagonal or parallel manner between each pair of PCB shields to prevent the resistor from movement, which prevents pin fatigue and fixes the value of the parasitic capacitance that is produced in the resistor-PCB-shield combination. In another configuration, the PCB shield is made of a flexible material, and snakes between and over the top or around the side ends of each resistor in a serpentine fashion, protecting the resistors from unwanted energies from both the top and the sides. The PCB shields disclosed herein eliminate variations in the percent error of the measurement phases, which contributes to achieving a highly accurate meter with an overall accuracy of less than 0.1%.

摘要翻译： 保护功率计中的高价值输入电阻，防止来自附近电源的电磁干扰和/或相邻相位的串扰造成的不必要的影响。 该屏蔽包括布置在功率计中的主印刷电路板上的每个输入电阻之间的多个印刷电路板屏蔽。 每个PCB屏蔽件具有导电层，其提供防止不需要的能量的屏蔽。 电阻器以对角或平行的方式布置在每对PCB屏蔽之间，以防止电阻器移动，这防止了引脚疲劳并固定了电阻器 - PCB-屏蔽组合中产生的寄生电容的值。 在另一种配置中，PCB屏蔽由柔性材料制成，并以蛇形方式在每个电阻器的顶部或周围的蛇舌之间和之上蛇形，从而保护电阻器免受顶部和侧面的不必要的能量的影响。 本文公开的PCB屏蔽消除了测量阶段的百分比误差的变化，这有助于实现具有小于0.1％的总精度的高精度仪表。