WO2014079238A1 - 一种抗交变磁场干扰的电子式电能表 - Google Patents
一种抗交变磁场干扰的电子式电能表 Download PDFInfo
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- WO2014079238A1 WO2014079238A1 PCT/CN2013/081567 CN2013081567W WO2014079238A1 WO 2014079238 A1 WO2014079238 A1 WO 2014079238A1 CN 2013081567 W CN2013081567 W CN 2013081567W WO 2014079238 A1 WO2014079238 A1 WO 2014079238A1
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- sampling resistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/065—Details of electronic electricity meters related to mechanical aspects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
- H01C3/02—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids arranged or constructed for reducing self-induction, capacitance or variation with frequency
Definitions
- the invention relates to the technical field of electronic instruments, in particular to an electronic electric energy meter capable of reducing interference of a shunt as a current sampling element by an alternating magnetic field.
- the electronic energy meter is an electronic meter device, which uses a dedicated electric energy meter integrated circuit to process and multiply the sampled voltage and current signals into a pulse output proportional to the electric energy by real-time sampling of the user's power supply voltage and current. , then display through a meter or digital display.
- An electronic electric energy meter of the prior art is a current sampling component made of a high stability material such as manganese copper.
- FIG. 1 is a schematic structural view of a prior art electronic electric energy meter
- FIG. 2 is a prior art electronic electric energy meter.
- FIG. 3 is a schematic structural view of a manganese-copper shunt of an electronic electric energy meter of the prior art
- FIG. 4 is a schematic view of the installation of a manganese-copper shunt of the electronic electric energy meter of the prior art, see FIG.
- a manganese copper shunt 100 and a relay 104 are installed in the housing 200 of the electronic electric energy meter. Due to the connection of the electronic electric energy meter, an alternating electromagnetic interference is generated in the direction of the magnetic field as indicated by the arrow in the figure.
- a manganese copper shunt 100 is connected to one side of the relay 104. Referring to FIGS.
- the manganese copper shunt 100 includes a first pure copper sheet portion 101, a manganese copper sheet portion 102, and a second pure copper sheet portion 103, wherein the ends of the manganese copper sheet portion 102 are respectively
- the first pure copper sheet portion 101 and the second pure copper sheet portion 103 are integrally connected, and the first pure copper sheet portion 101, the manganese copper sheet portion 102, and the second pure copper sheet portion 103 are both planar and are in existence.
- the manganese copper shunt 100 is usually connected to a lead end of the relay 104, that is, the first pure copper piece portion 101 of the manganese copper shunt 100 is connected to the lead end of the relay 104, in the first pure copper piece portion 101.
- a first connecting end 1011 adjacent to the manganese copper sheet portion 102 is disposed, and a second connecting end 1031 adjacent to the manganese copper sheet portion 102 is disposed on the second pure copper sheet portion 103, at the first connecting end 1011 and the second connection
- a signal line 105 is soldered to each end of the terminal 1031.
- the ends of the two signal lines 105 are connected to the circuit board 106 of the electronic energy meter.
- the first connection end 1011 and the second connection end 1031 are both from the manganese copper shunt.
- the upper side edge of the 100 is formed to protrude upward, that is, the first connecting end 1011 is in the first pure copper piece
- the upper side edge of the 101 is formed to protrude upwardly, that is, the second connecting end 1031 is formed to protrude upward from the upper side edge of the second pure copper piece portion 103.
- the electronic electric energy meter of the structure when there is external interference, the table The meter may misinterpret the interference as a number of pulses into the electrical energy. Under the action of the alternating electromagnetic field, the closed circuit formed by the manganese copper shunt 100, the signal line 105, and the circuit board 106 of the electronic energy meter generates an induced electromotive force, generates an induced current, and hinders the change of the circuit current.
- the manganese copper shunt 100 is usually connected to one side of the relay 104, and is affected by the interference magnetic field of the cable, and has a magnetic field interference signal with a certain direction on the side of the relay 104, as shown in FIG.
- the manganese copper sheet portion 102 connected to one side of the relay 104 is perpendicular to the direction of the magnetic field, and the entire surface of the manganese copper sheet portion 102 is passed through the magnetic induction line, so that the circuit is subjected to a large Magnetic field interference.
- electronic energy meters are also subject to interference from magnetic field interference signals in uncertain directions.
- the object of the present invention is to overcome the deficiencies of the prior art and provide an electronic electric energy meter resistant to alternating magnetic field interference.
- the shunt as a current sampling element can be reduced by the alternating magnetic field interference.
- the influence of the magnetic field on the current sampling signal is reduced, thereby effectively ensuring the accuracy of the electronic energy meter measurement.
- an electronic electric energy meter resistant to alternating magnetic field interference including a circuit board of a shunt, a relay and an electronic electric energy meter; the shunt is connected to an extraction of the relay
- the shunt is a chip structure, and the shunt includes a sampling resistor piece made of a high resistivity material, and a through hole is arranged in the sampling resistor piece; the first connection is respectively provided at both ends of the sampling resistor piece And a second connecting end, wherein the first connecting end is integrally formed by an upwardly extending upper edge of the diverter, and the second connecting end is integrally formed by a lower side edge of the diverter;
- a signal line is respectively connected to a connecting end and a second connecting end, and the signal line on the second connecting end is hinged together with the signal line on the first connecting end of the upper side after passing through the through hole, and two signal lines
- the ends are respectively connected to the circuit board of the electronic energy meter.
- the shunt further includes a first conductive piece and a second conductive piece, the sampling resistor piece is connected between the first conductive piece and the second conductive piece, and the flow divider is connected to one side of the relay through the first conductive piece The leading end of the side.
- the first connecting end and the second connecting end are respectively disposed on the sampling resistor piece.
- the first connecting end is disposed on the first conductive sheet and is located near the sampling resistor piece; the second connecting end is disposed on the second conductive sheet and is located near the sampling resistor piece.
- the first connecting end is disposed on the second conductive sheet and is located near the sampling resistor piece; the second connecting end is disposed on the first conductive sheet and is located near the sampling resistor piece.
- the two signal lines are respectively folded into a lateral direction and connected to the corresponding first connection end and the second connection end.
- Both ends of the sampling resistor piece are integrally connected to the first conductive sheet and the second conductive sheet, respectively.
- An electronic electric energy meter resistant to alternating magnetic field interference is a first connecting end and a second connecting end which are used for connecting signal lines for current sampling, respectively, which are respectively disposed on the upper side of the shunt and under the shunt On the side, a through hole is formed in the sampling resistor piece, and a signal line connected to the second connection end on the lower side of the shunt is passed through the through hole.
- the sampling resistor chip lead-out legs are respectively behind the upper and lower sides, and the signal line is connected to the sampling resistor through the signal line connected to the lower side
- the through hole of the chip is hinged together with the signal line of the upper side above the sampling resistor piece.
- the signal line connected to the lower side can be used to pass the sampling resistor through the through hole of the sampling resistor piece.
- the slice is divided into two regions, so that in the magnetic field, the sampling resistor piece is divided into two regions by the signal line on the projection surface (ie, the plane perpendicular to the direction of the magnetic field), and two loops with opposite current directions are formed.
- the induced currents generated on both sides are opposite in direction and cancel each other out.
- the sampling resistor piece and the signal line are on the lateral projection surface of the sampling resistor piece to form two circuits with opposite current directions, in an uncertain alternating
- the induced currents generated on both sides are opposite in direction and cancel each other out. In this way, the interference is reduced, that is, it can resist the interference of the shunt that is determined or uncertain of the alternating magnetic field.
- the invention has the beneficial effects that the first connection end and the second connection end for connecting the signal lines to realize current sampling by using the shunt are respectively disposed on the upper side and the lower side of the shunt, and are set in the sampling resistor sheet.
- the induced currents generated on both sides are opposite in direction and can cancel each other out;
- the sampling resistor and the signal line form a circuit with opposite current directions on the lateral projection surface of the sampling resistor, under the action of an indeterminate alternating magnetic field (the direction is not perpendicular to the sampling resistor).
- the induced currents generated on both sides are opposite in direction and cancel each other out.
- FIG. 1 is a schematic structural view of a prior art electronic energy meter
- FIG. 2 is a schematic structural view of a current sampling circuit of a prior art electronic energy meter
- FIG. 3 is a schematic structural view of a manganese-copper shunt of an electronic electric energy meter of the prior art
- FIG. 4 is a schematic view showing the installation of a manganese copper shunt of an electronic electric energy meter of the prior art
- FIG. 5 is a schematic structural view of a shunt of an electronic electric energy meter of the present invention.
- Figure 6 is a front elevational view of the flow divider of the electronic power meter of the present invention.
- FIG. 7 is a schematic structural view of a shunt connection signal line of an electronic electric energy meter of the present invention.
- Figure 8 is a schematic view showing the installation of the shunt of the electronic electric energy meter of the present invention.
- FIG. 9 is a schematic view showing the connection of a shunt and a signal line of the electronic electric energy meter of the present invention.
- Figure 10 is a schematic view of the rear view direction of Figure 9;
- Figure 11 is a cross-sectional view taken along line A-A of Figure 10 .
- an electronic electric energy meter resistant to alternating magnetic field interference of the present invention comprising a circuit board of a shunt 1, a relay 2 and an electronic electric energy meter (not shown)
- the shunt 1 includes a first conductive sheet 11, a sampling resistor sheet 12 and a second conductive sheet 13, wherein the sampling resistor sheet is made of a high resistivity material, and in this embodiment, manganese bronze is used, of course, a high resistivity material. Other types of materials, such as constant copper, etc., may be used.
- the first conductive sheet 11 and the second conductive sheet 13 may be pure copper. Of course, other conductive materials may also be used.
- the two ends of the sampling resistor 12 are integrally connected with the first conductive sheet 11 and the second conductive sheet 13, respectively, and the shunt 1 is connected to the leading end of the one side 21 of the relay 2 through the first conductive sheet 11: actually,
- the first fixed end 14 connected to the relay is further disposed on the shunt 1 for connecting with the lead of the relay 2.
- the first fixed end 14 is integrally connected with the first conductive piece 11;
- the second fixed end 15 is fixedly connected to the electric meter, and the second fixed end 15 is integrally connected with the second conductive piece 13 and has a disturbing magnetic field for determining the direction of the magnetic field at the installation of the shunt.
- the direction of the disturbing magnetic field is perpendicular to the shunt;
- the sampling resistor piece 12 is a planar structure, and the first conductive sheet 11 and the second conductive sheet 13 are also planar structures.
- a through hole 121 is defined in the sampling resistor 12, and two ends of the sampling resistor 12 are respectively provided with a first connecting end 111 and a second connecting end 131, wherein the first connecting end 111 is provided by the upper side of the shunt
- the edge is integrally formed to protrude upwardly, and the second connecting end 131 is integrally formed downwardly from the lower side edge of the shunt;
- a signal line 31 is connected to the first connecting end 111, and another connecting line is connected to the second connecting end 131.
- a signal line 32, the signal line 32 on the second connection end 131 is hinged together with the signal line 31 on the upper first connection end 111 after passing through the through hole 121, and the ends of the two signal lines 31, 32 Connect to the board of the electronic energy meter.
- first connection end 111 and the second connection end 131 are respectively disposed on the sampling resistor piece, the first connection end 111 is disposed on the upper side of the sampling resistor piece, and the second connection end 131 is disposed on the lower side of the sampling resistor piece.
- first connection end and the second connection end may be arranged in another manner, that is, the first connection end is disposed on the first conductive sheet and is located near the sampling resistor piece; The second connection end is disposed on the second conductive sheet and is located near the sampling resistor piece; or, the first connection end is disposed on the second conductive sheet and is located near the sampling resistor piece; The second connection end is disposed on the first conductive sheet and is located near the sampling resistor piece.
- the signal line 31 and the signal line 32 are respectively folded into a lateral direction and are connected to the corresponding first connection end 111 and the second connection end 131 (as shown in FIG. 7 and FIG. 8), that is, two wires (signal lines) are folded into
- the lateral direction ie, the horizontal direction
- the lateral direction is respectively fixed to the first connection end and the second connection end, and the area enclosed by the two signal lines and the sampling resistor piece can be further reduced.
- An electronic electric energy meter resistant to alternating magnetic field interference is a first connecting end 111 and a second connecting end 131 for connecting a signal line for current sampling, respectively, which are respectively disposed on the upper side of the shunt and the shunt
- a through hole 121 is formed in the sampling resistor piece 12
- a signal line connected to the second connection end 131 on the lower side of the shunt is passed through the through hole 121. Since the first connection end 111 and the second connection end 131 of the signal line are connected, one on the upper side and one on the lower side, that is, the sampling resistor piece lead-out legs are respectively behind the upper and lower sides, and are worn by the signal line 32 connected to the lower side.
- the through hole 121 of the sampling resistor piece is stretched together with the signal line 31 of the upper side above the sampling resistor piece.
- the signal line 32 connected to the lower side can be made to pass through the sampling resistor piece.
- the hole 121 divides the sampling resistor into two regions, so that in the magnetic field, the sampling resistor is divided into two regions by the signal line on the projection surface (ie, a plane perpendicular to the direction of the magnetic field) to form two currents.
- the induced currents generated on both sides are opposite in direction and cancel each other out.
- the sampling resistive piece 12 and the signal line 32 are formed on the lateral projection surface of the sampling resistor piece to form two circuits with opposite current directions, as shown in the figure.
- circuit S3 and circuit S4 in step 11 under the action of an indeterminate alternating magnetic field (the direction is not perpendicular to the sampling resistor piece), the induced currents generated on both sides are opposite in direction and cancel each other out. In this way, the interference is reduced, that is, it can resist the interference of the alternating magnetic field of the shunt that is determined or uncertain.
- the invention relates to an electronic electric energy meter resistant to alternating magnetic field interference, which can resist the alternating magnetic field interference from the determined direction (interference generated by the cable), and can also resist the interference from the alternating magnetic field in the uncertain direction, thereby being effective. Guarantee the accuracy of electronic energy meter measurement.
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Abstract
本发明公开了一种抗交变磁场干扰的电子式电能表，包括分流器、继电器和电子式电能表的电路板；分流器中含有一段釆用高电阻率材料制作而成的釆样电阻片，在釆样电阻片中设有一个通孔，其两端分别设有第一连接端和第二连接端，第一连接端由分流器的上侧边缘一体向上凸伸形成，第二连接端由分流器的下侧边缘一体向下凸伸形成；在第一连接端和第二连接端上分别连接一条信号线，第二连接端上的信号线在穿过通孔后与第一连接端上的信号线铰并在一起，两条信号线的末端分别连接到电路板。釆用该结构后，既能够抵抗来自于确定方向（电缆产生的干扰）交变磁场干扰，还能够抵抗来自于不确定方向交变磁场干扰，从而有效地保证电子式电能表计量的准确性。
Description
本发明涉及电子仪表技术领域，特别是涉及一种可减小作为电流采样元件的分流器受交变磁场干扰的电子式电能表。
电子式电能表是一种电子仪表设备，它通过对用户供电电压和电流实时采样，采用专用的电能表集成电路，对采样电压和电流信号进行处理并相乘转换成与电能成正比的脉冲输出，再通过计度器或数字显示器显示。现有技术的一种电子式电能表是采用锰铜等高稳定性材料制作电流采样元件，图1为现有技术的电子式电能表的构造示意图，图2为现有技术的电子式电能表的电流采样电路的结构示意图，图3为现有技术的电子式电能表的锰铜分流器的结构示意图，图4为现有技术的电子式电能表的锰铜分流器的安装示意图，参见图1所示，在电子式电能表的壳体200内安装有锰铜分流器100和继电器104，由于电子式电能表连接电缆的缘故，会产生磁场方向如图中箭头所示的交变电磁干扰，在继电器104的一侧边连接锰铜分流器100。参见图2至图4所示，该锰铜分流器100包括第一纯铜片部分101、锰铜片部分102和第二纯铜片部分103，其中，锰铜片部分102的两端分别与第一纯铜片部分101和第二纯铜片部分103一体相连接，且第一纯铜片部分101、锰铜片部分102和第二纯铜片部分103都是平面形结构且是处在同一平面中，锰铜分流器100通常连接于继电器104的一引出端，即锰铜分流器100的第一纯铜片部分101接在继电器104的引出端上，在第一纯铜片部分101上设有靠近锰铜片部分102的第一连接端1011，在第二纯铜片部分103上设有靠近锰铜片部分102的第二连接端1031，在第一连接端1011和第二连接端1031上各焊接有一条信号线105，两条信号线105的末端连接到电子式电能表的电路板106上，其中，第一连接端1011和第二连接端1031都是从锰铜分流器100的上侧边缘向上凸伸形成，即第一连接端1011是在第一纯铜片部分101的上侧边缘向上凸伸形成，即第二连接端1031是在第二纯铜片部分103的上侧边缘向上凸伸形成，这种结构的电子式电能表，当有外来干扰时，表计可能将干扰误当若干个脉冲计入电能。在交变电磁场的作用下，锰铜分流器100、信号线105、电子式电能表的电路板106构成的闭合回路会生成感应电动势，产生感应电流，阻碍电路电流的变化。根据电磁感应定律可知：
E=-Nd Φ /dt , Φ =B * S ，其中 Φ
为穿过闭合回路的磁通量，t为时间，B为磁感应强度，S为垂直于磁场方向的面积；进而对电表的计量精度造成影响，特别是小电流信号的计量精度影响很大。另一方面，当断开电源时，由于受磁场的作用，锰铜分流器、信号线、电子式电能表的电路板构成的闭合回路产生的自感电流，会使电能表出现电流读数，造成无任何负载情况下电能表错误地计量出用电量。这种结构的电子式电能表，锰铜分流器100通常连接在继电器104的一侧边，受到电缆的干扰磁场影响，在继电器104的该侧边具有确定方向的磁场干扰信号，如图4中的箭头所示，这样，连接在继电器104一侧边的锰铜片部分102就是垂直于磁场方向，则锰铜片部分102的整个面都被磁感应线穿过，因此，电路会受到较大的磁场干扰。而且，电子式电能表还会受到不确定方向的磁场干扰信号的干扰。
本发明的目的在于克服现有技术之不足，提供一种抗交变磁场干扰的电子式电能表，通过对分流器的结构进行改进，能够减小作为电流采样元件的分流器受交变磁场干扰，降低磁场对电流采样信号的影响，从而有效地保证电子式电能表计量的准确性。
本发明解决其技术问题所采用的技术方案是：一种抗交变磁场干扰的电子式电能表，包括分流器、继电器和电子式电能表的电路板；所述分流器连接在继电器的一引出端；分流器为片体结构，分流器中含有一段采用高电阻率材料制作而成的采样电阻片，在采样电阻片中设有一个通孔；采样电阻片的两端分别设有第一连接端和第二连接端，其中，所述第一连接端由分流器的上侧边缘一体向上凸伸形成，所述第二连接端由分流器的下侧边缘一体向下凸伸形成；在第一连接端和第二连接端上分别连接一条信号线，第二连接端上的信号线在穿过通孔后与上侧的第一连接端上的信号线铰并在一起，两条信号线的末端分别连接到电子式电能表的电路板上。
所述分流器还包括第一导电片和第二导电片，采样电阻片连接在第一导电片和第二导电片之间，所述分流器通过第一导电片连接在所述继电器的一侧边的引出端。
所述的第一连接端和第二连接端分别设在采样电阻片上。
所述的第一连接端设在第一导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第二导电片上，并处在靠近采样电阻片的位置处。
所述的第一连接端设在第二导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第一导电片上，并处在靠近采样电阻片的位置处。
所述两条信号线分别折成横向并与对应的第一连接端、第二连接端焊接相连接。
所述采样电阻片的两端分别与第一导电片和第二导电片一体相连接。
本发明的一种抗交变磁场干扰的电子式电能表，是将用来连接信号线以实现电流采样的第一连接端和第二连接端分别设在分流器的上侧和分流器的下侧，并在采样电阻片中设一个通孔，让连接在分流器下侧的第二连接端上的信号线穿过该通孔。由于连接信号线的第一连接端和第二连接端，一个在上侧，一个在下侧，即采样电阻片引出脚分别在上下边之后，且由于连接于下侧边的信号线穿出采样电阻片的通孔并在采样电阻片的上方与上侧边的信号线铰并在一起，一方面，可以使得连接于下侧边的信号线利用穿过采样电阻片的通孔就会将采样电阻片划成两个区域，这样在磁场中，采样电阻片在投影面（即垂直于磁场方向的平面）上就会被信号线划成两个区域，形成两个电流方向相反的回路，在确定的交变磁场（来自于电缆产生的磁场干扰）的作用下，两边生成的感应电流方向相反，可相互抵消。另一方面，可以利用信号线穿过采样电阻片的通孔后，采样电阻片和信号线在采样电阻片的侧向的投影面，形成两个电流方向相反的回路，在不确定的交变磁场（方向并不垂直于采样电阻片）的作用下，两边生成的感应电流方向相反，可相互抵消。以此来降低干扰，也就是可以抵抗分流器受确定或不确定交变磁场的干扰。
本发明的有益效果是，由于采用了将分流器的用来连接信号线以实现电流采样的第一连接端和第二连接端分别设在分流器的上边和下边，且在采样电阻片中设有一个通孔，让连接于下侧边的信号线穿出采样电阻片的通孔并在采样电阻片的上方与上侧边的信号线铰并在一起，这样，一方面，就使得采样电阻片在磁场中，采样电阻片上就会有两个电流方向相反的回路，在确定的交变磁场（来自于电缆产生的磁场干扰）的作用下，两边生成的感应电流方向相反，可相互抵消；另一方面，采样电阻片和信号线在采样电阻片的侧向的投影面，形成两个电流方向相反的回路，在不确定的交变磁场（方向并不垂直于采样电阻片）的作用下，两边生成的感应电流方向相反，可相互抵消。从而实现了抵抗分流器受确定或不确定的交变磁场干扰的目的。
相比较于现有技术，可以带来如下的有益效果：
1、能减小分流器受干扰磁场的干扰；
2、易加工，批量产业化；
3、低成本。
以下结合附图及实施例对本发明作进一步详细说明；但本发明的一种抗交变磁场干扰的电子式电能表不局限于实施例。
图1是现有技术的电子式电能表的构造示意图；
图2是现有技术的电子式电能表的电流采样电路的结构示意图；
图3是现有技术的电子式电能表的锰铜分流器的结构示意图；
图4是现有技术的电子式电能表的锰铜分流器的安装示意图；
图5是本发明的电子式电能表的分流器的结构示意图；
图6是本发明的电子式电能表的分流器的主视图；
图7是本发明的电子式电能表的分流器连接信号线的结构示意图；
图8是本发明的电子式电能表的分流器的安装示意图；
图9是本发明的电子式电能表的分流器与信号线的连接示意图；
图10是图9的后视方向的示意图；
图11是沿图10中A-A线的剖视图。
实施例，参见图5至图11所示，本发明的一种抗交变磁场干扰的电子式电能表，包括分流器1、继电器2和电子式电能表的电路板（图中未示出）；分流器1包括第一导电片11、采样电阻片12和第二导电片13，其中，采样电阻片采用高电阻率材料制作而成，本实施例为采用锰铜，当然，高电阻率材料还可以是其他类型的材料，比如康铜等，第一导电片11和第二导电片13采用纯铜，当然，也可以是其它的导电材料。采样电阻片12的两端分别与第一导电片11和第二导电片13一体相连接，分流器1通过第一导电片11接在继电器2的一侧边21的引出端：实际上，是在分流器1上还设有与继电器连接的第一固定端14，该固定端14用来实现与继电器2的引出相连接，第一固定端14与第一导电片11一体相连接；在分流器1上还设有与电表固定连接的第二固定端15，第二固定端15与第二导电片13一体相连接，在分流器的安装处具有确定磁场方向的干扰磁场，当采用图8所示的连接方式时，则干扰磁场的方向是垂直于分流器；所述采样电阻片12为平面形结构，所述的第一导电片11和第二导电片13也为平面形结构。在采样电阻片12中设有一个通孔121，采样电阻片12的两端分别设有第一连接端111和第二连接端131，其中，所述第一连接端111由分流器的上侧边缘一体向上凸伸形成，所述第二连接端131由分流器的下侧边缘一体向下凸伸形成；在第一连接端111上连接一条信号线31，在第二连接端131上连接另一条信号线32，第二连接端131上的信号线32在穿过通孔121后与上侧的第一连接端111上的信号线31铰并在一起，两条信号线31、32的末端分别连接到电子式电能表的电路板上。
本实施例中，第一连接端111和第二连接端131分别设在采样电阻片上，第一连接端111设在采样电阻片的上侧，第二连接端131设在采样电阻片的下侧。
当然，第一连接端和第二连接端的设置也可以采用另二种方案，即，所述第一连接端设在第一导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第二导电片上，并处在靠近采样电阻片的位置处；或者是，所述第一连接端设在第二导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第一导电片上，并处在靠近采样电阻片的位置处。
信号线31和信号线32分别折成横向并与对应的第一连接端111、第二连接端131焊接相连接（如图7、图8所示），即两条导线（信号线）折成横向（即水平方向）分别与第一连接端和第二连接端焊接相固定，可以再减小两条信号线与采样电阻片所围成的面积。
本发明的一种抗交变磁场干扰的电子式电能表，是将用来连接信号线以实现电流采样的第一连接端111和第二连接端131分别设在分流器的上侧和分流器的下侧，并在采样电阻片12中设一个通孔121，让连接在分流器下侧的第二连接端131上的信号线穿过该通孔121。由于连接信号线的第一连接端111和第二连接端131，一个在上侧，一个在下侧，即采样电阻片引出脚分别在上下边之后，且由于连接于下侧边的信号线32穿出采样电阻片的通孔121并在采样电阻片的上方与上侧边的信号线31铰并在一起，一方面，可以使得连接于下侧边的信号线32利用穿过采样电阻片的通孔121就会将采样电阻片划成两个区域，这样在磁场中，采样电阻片在投影面（即垂直于磁场方向的平面）上就会被信号线划成两个区域，形成两个电流方向相反的回路，如图9中的回路S1和回路S2，在确定的交变磁场（来自于电缆产生的磁场干扰）的作用下，两边生成的感应电流方向相反，可相互抵消。另一方面，可以利用信号线32穿过采样电阻片的通孔121后，采样电阻片12和信号线32在采样电阻片的侧向的投影面，形成两个电流方向相反的回路，如图11中的回路S3和回路S4，在不确定的交变磁场（方向并不垂直于采样电阻片）的作用下，两边生成的感应电流方向相反，可相互抵消。以此来降低干扰，也就是可以抵抗分流器受确定或不确定的交变磁场的干扰。
上述实施例仅用来进一步说明本发明的一种抗交变磁场干扰的电子式电能表，但本发明并不局限于实施例，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均落入本发明技术方案的保护范围内。
本发明一种抗交变磁场干扰的电子式电能表，工作时既能够抵抗来自于确定方向（电缆产生的干扰）交变磁场干扰，还能够抵抗来自于不确定方向交变磁场干扰，从而有效地保证电子式电能表计量的准确性。
Claims (9)
- 一种抗交变磁场干扰的电子式电能表，包括分流器、继电器和电子式电能表的电路板；所述分流器连接在继电器的一引出端；分流器为片体结构，分流器中含有一段采用高电阻率材料制作而成的采样电阻片；其特征在于：在采样电阻片中设有一个通孔；采样电阻片的两端分别设有第一连接端和第二连接端，其中，所述第一连接端由分流器的上侧边缘一体向上凸伸形成，所述第二连接端由分流器的下侧边缘一体向下凸伸形成；在第一连接端和第二连接端上分别连接一条信号线，第二连接端上的信号线在穿过通孔后与上侧的第一连接端上的信号线铰并在一起，两条信号线的末端分别连接到电子式电能表的电路板上。
- 根据权利要求1所述的抗交变磁场干扰的电子式电能表，其特征在于：所述分流器还包括第一导电片和第二导电片，采样电阻片连接在第一导电片和第二导电片之间，所述分流器通过第一导电片连接在所述继电器的一侧边的引出端。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述的第一连接端和第二连接端分别设在采样电阻片上。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述的第一连接端设在第一导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第二导电片上，并处在靠近采样电阻片的位置处。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述的第一连接端设在第二导电片上，并处在靠近采样电阻片的位置处；所述的第二连接端设在第一导电片上，并处在靠近采样电阻片的位置处。
- 根据权利要求1或2或3或4或5所述的抗交变磁场干扰的电子式电能表，其特征在于：所述两条信号线分别折成横向并与对应的第一连接端、第二连接端焊接相连接。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述采样电阻片的两端分别与第一导电片和第二导电片一体相连接。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述的采样电阻片上侧第一连接端、下侧第二连接端上分别连接一条信号线连接一条信号线，使得连接于下侧边的信号线利用穿过采样电阻片的通孔就会将采样电阻片划成两个区域，这样在磁场中，采样电阻片在投影面上就会被信号线划成两个区域，形成两个电流方向相反的回路，在确定的交变磁场的作用下，两边生成的感应电流方向相反，可相互抵消。
- 根据权利要求2所述的抗交变磁场干扰的电子式电能表，其特征在于：所述的采样电阻片上侧第一连接端、下侧第二连接端上分别连接一条信号线连接一条信号线，连接于下侧边信号线穿过采样电阻片的通孔后，采样电阻片和信号线在采样电阻片的侧向的投影面，形成两个电流方向相反的回路，在不确定的交变磁场的作用下，两边生成的感应电流方向相反，可相互抵消。
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| CN102323459A (zh) * | 2011-08-12 | 2012-01-18 | 桐乡市伟达电子有限公司 | 抗交变磁场锰铜分流器 |
| CN202903841U (zh) * | 2012-11-26 | 2013-04-24 | 厦门宏发电力电器有限公司 | 一种抗交变磁场干扰的电子式电能表 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111830301A (zh) * | 2019-04-23 | 2020-10-27 | 宁波三星智能电气有限公司 | 一种电能表 |
| CN111830301B (zh) * | 2019-04-23 | 2023-03-31 | 宁波三星智能电气有限公司 | 一种电能表 |
| CN111830297A (zh) * | 2020-06-05 | 2020-10-27 | 宁波三星医疗电气股份有限公司 | 一种电能表0.5mT工频磁场下防干扰的方法 |
| CN116298444A (zh) * | 2023-03-15 | 2023-06-23 | 武汉盛帆电子股份有限公司 | 仿真智能电能表 |
| CN116298444B (zh) * | 2023-03-15 | 2024-01-09 | 武汉盛帆电子股份有限公司 | 仿真智能电能表 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2924448A4 (en) | 2016-07-20 |
| EP2924448A1 (en) | 2015-09-30 |
| CN202903841U (zh) | 2013-04-24 |
| EP2924448B1 (en) | 2019-11-20 |
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