CN208128207U - A kind of attenuator based on G3 frequency band electric line communication system - Google Patents
A kind of attenuator based on G3 frequency band electric line communication system Download PDFInfo
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- CN208128207U CN208128207U CN201820911991.2U CN201820911991U CN208128207U CN 208128207 U CN208128207 U CN 208128207U CN 201820911991 U CN201820911991 U CN 201820911991U CN 208128207 U CN208128207 U CN 208128207U
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Abstract
本实用新型涉及电能表技术领域，尤其涉及一种基于G3频带电力线通信系统的衰减器，包括低通滤波器以及匹配衰减网络，所述匹配衰减网络为对称结构，且所述匹配衰减网络内还设有防护模块。这种衰减器可靠性较高。
The utility model relates to the technical field of electric energy meters, in particular to an attenuator based on a G3 frequency band power line communication system, comprising a low-pass filter and a matching attenuation network, the matching attenuation network is a symmetrical structure, and the matching attenuation network is also Equipped with protection module. This attenuator has high reliability.
Description
技术领域technical field
本实用新型涉及电能表技术领域，尤其涉及一种基于G3频带电力线通信系统的衰减器。The utility model relates to the technical field of electric energy meters, in particular to an attenuator based on a G3 frequency band power line communication system.
背景技术Background technique
衰减器主要是提供一种设定衰减值的设备，由低通滤波器和匹配衰减网络组合而成，但是现有技术的匹配衰减网络并不具备防护，所以当有电网噪声时容易失效。The attenuator mainly provides a device for setting the attenuation value, which is composed of a low-pass filter and a matching attenuation network. However, the matching attenuation network in the prior art does not have protection, so it is easy to fail when there is grid noise.
发明内容Contents of the invention
本实用新型所要解决的技术问题是：提供一种可靠性较高的基于G3频带电力线通信系统的衰减器。The technical problem to be solved by the utility model is to provide a highly reliable attenuator based on the G3 frequency band power line communication system.
本实用新型所采用的技术方案是：一种基于G3频带电力线通信系统的衰减器，包括低通滤波器以及匹配衰减网络，匹配衰减网络为对称结构，且匹配衰减网络内还设有防护模块。The technical solution adopted by the utility model is: an attenuator based on the G3 frequency band power line communication system, including a low-pass filter and a matching attenuation network, the matching attenuation network is a symmetrical structure, and a protection module is also provided in the matching attenuation network.
匹配衰减网络包括第一电容、第二电容、第三电容、第四电容、第一电阻、第二电阻、第三电阻、第四电阻以及第五电阻，第一电容、第一电阻、第二电阻以及第二电容依次连接，第三电容、第三电阻、第四电阻以及第四电容依次连接，且第五电阻一端连接在第一电阻与第二电阻之间，第五电阻另一端连接在第三电阻与第四电阻之间。The matching attenuation network includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, the first capacitor, the first resistor, the second The resistor and the second capacitor are connected in sequence, the third capacitor, the third resistor, the fourth resistor and the fourth capacitor are connected in sequence, and one end of the fifth resistor is connected between the first resistor and the second resistor, and the other end of the fifth resistor is connected to the Between the third resistor and the fourth resistor.
匹配衰减网络还包括第六电阻、第七电阻以及第八电阻，第一电容、第一电阻、第六电阻、第二电阻以及第二电容依次连接，第三电容、第三电阻、第七电阻、第四电阻以及第四电容依次连接，第五电阻一端连接在第一电阻与第六电阻之间，第五电阻另一端连接在第三电阻与第七电阻之间，第八电阻一端连接在第六电阻与第二电阻之间，第八电阻另一端连接在第七电阻与第四电阻之间。The matching attenuation network also includes a sixth resistor, a seventh resistor, and an eighth resistor, the first capacitor, the first resistor, the sixth resistor, the second resistor, and the second capacitor are connected in sequence, and the third capacitor, the third resistor, and the seventh resistor , the fourth resistor and the fourth capacitor are connected in sequence, one end of the fifth resistor is connected between the first resistor and the sixth resistor, the other end of the fifth resistor is connected between the third resistor and the seventh resistor, and one end of the eighth resistor is connected to Between the sixth resistor and the second resistor, the other end of the eighth resistor is connected between the seventh resistor and the fourth resistor.
防护模块包括第一放电管与第二放电管，第一放电管一端连接在第一电容与第一电阻之间，第一放电管另一端连接在第三电容与第三电阻之间，第二放电管一端连接在第二电阻与第二电容之间，第二放电管另一端连接在第四电阻与第四电容之间。The protection module includes a first discharge tube and a second discharge tube, one end of the first discharge tube is connected between the first capacitor and the first resistor, the other end of the first discharge tube is connected between the third capacitor and the third resistor, and the second discharge tube is connected between the first capacitor and the first resistor. One end of the discharge tube is connected between the second resistor and the second capacitor, and the other end of the second discharge tube is connected between the fourth resistor and the fourth capacitor.
第一电阻、第二电阻、第三电阻以及第四电阻的阻值为51欧姆，第六电阻以及第七电阻的阻值为100欧姆，第五电阻以及第八电阻的阻值为5.1欧姆。The resistance values of the first resistor, the second resistor, the third resistor and the fourth resistor are 51 ohms, the resistance values of the sixth resistor and the seventh resistor are 100 ohms, and the resistance values of the fifth resistor and the eighth resistor are 5.1 ohms.
低通滤波器为7阶巴特沃斯结构。The low-pass filter is a 7th-order Butterworth structure.
低通滤波器为LCL的T型对称结构布局。The low-pass filter is a T-shaped symmetrical structure layout of the LCL.
低通滤波器包括第一电感、第二电感、第三电感、第四电感、第五电感、第六电感、第七电感、第八电感、第五电容、第六电容以及第七电容，第一电感、第二电感、第三电感、第四电感依次连接，第五电感、第六电感、第七电感、第八电感依次连接，第五电容的一端连接在第一电感与第二电感之间，第五电容的另一端连接在第五电感与第六电感之间，第六电容的一端连接在第二电感与第三电感之间，第六电容的另一端连接在第六电感与第七电感之间，第七电容的一端连接在第三电感与第四电感之间，第七电容的另一端连接在第七电感与第八电感之间。The low-pass filter includes a first inductor, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a seventh inductor, an eighth inductor, a fifth capacitor, a sixth capacitor, and a seventh capacitor. The first inductor, the second inductor, the third inductor, and the fourth inductor are connected in sequence, the fifth inductor, the sixth inductor, the seventh inductor, and the eighth inductor are connected in sequence, and one end of the fifth capacitor is connected between the first inductor and the second inductor The other end of the fifth capacitor is connected between the fifth inductance and the sixth inductance, one end of the sixth capacitor is connected between the second inductance and the third inductance, and the other end of the sixth capacitor is connected between the sixth inductance and the sixth inductance. Between the seven inductors, one end of the seventh capacitor is connected between the third inductor and the fourth inductor, and the other end of the seventh capacitor is connected between the seventh inductor and the eighth inductor.
采用以上结构与现有技术相比，本实用新型具有以下优点：将匹配衰减网络设置成对称结构，这样可以实现双向通信，并且双向效果相同；其次，在匹配衰减网络中设置防护模块，这样可以防止电网噪声导致匹配衰减网络失效。Compared with the prior art by adopting the above structure, the utility model has the following advantages: the matching attenuation network is set to a symmetrical structure, so that two-way communication can be realized, and the two-way effect is the same; secondly, a protection module is set in the matching attenuation network, which can Prevent grid noise from causing matching attenuation network failure.
并且设置了两级衰减，这样使得整体效果更好。And set two levels of attenuation, which makes the overall effect better.
采用7阶巴特沃斯结构，并且是LCL的T型结构布局，这样可以防止低通滤波器对测试源产生低阻抗通道而影响最终测试结果。The 7th order Butterworth structure is adopted, and it is a T-shaped structure layout of LCL, which can prevent the low-pass filter from producing a low-impedance channel to the test source and affect the final test result.
附图说明Description of drawings
图1为本实用新型衰减器的示意图。Fig. 1 is a schematic diagram of the utility model attenuator.
图2为本实用新型衰减器中的低通滤波器的电路原理图。Fig. 2 is a schematic circuit diagram of the low-pass filter in the attenuator of the present invention.
图3为本实用新型衰减器中匹配衰减网络的电路原理图。Fig. 3 is a schematic circuit diagram of the matching attenuation network in the attenuator of the present invention.
如图所示：R1、第一电阻；R2、第二电阻；R3、第三电阻；R4、第四电阻；R5、第五电阻；R6、第六电阻；R7、第七电阻；R8、第八电阻；C1、第一电容；C2、第二电容；C3、第三电容；C4、第四电容；C5、第五电容；C6、第六电容；C7、第七电容；L1、第一电感；L2、第二电感；L3、第三电感；L4、第四电感；L5、第五电感；L6、第六电感；L7、第七电感；L8、第八电感；VD1、第一放电管；VD2、第二放电管。As shown in the figure: R1, the first resistor; R2, the second resistor; R3, the third resistor; R4, the fourth resistor; R5, the fifth resistor; R6, the sixth resistor; R7, the seventh resistor; R8, the first resistor Eight resistors; C1, the first capacitor; C2, the second capacitor; C3, the third capacitor; C4, the fourth capacitor; C5, the fifth capacitor; C6, the sixth capacitor; C7, the seventh capacitor; L1, the first inductance ; L2, the second inductance; L3, the third inductance; L4, the fourth inductance; L5, the fifth inductance; L6, the sixth inductance; L7, the seventh inductance; L8, the eighth inductance; VD1, the first discharge tube; VD2, the second discharge tube.
具体实施方式Detailed ways
以下结合附图与具体实施方式对本实用新型做进一步描述，但是本实用新型不仅限于以下具体实施方式。The utility model is further described below in conjunction with the accompanying drawings and specific embodiments, but the utility model is not limited to the following specific embodiments.
如图1所示，本申请的衰减器包括两部分，分别是低通滤波器与匹配衰减网络，两者均分别与电网连通。As shown in FIG. 1 , the attenuator of the present application includes two parts, namely a low-pass filter and a matched attenuation network, both of which are respectively connected to the power grid.
其中低通滤波器为7阶巴特沃斯结构，具体如图2所示，包括第一电感、第二电感、第三电感、第四电感、第五电感、第六电感、第七电感、第八电感、第五电容、第六电容以及第七电容，第一电感、第二电感、第三电感、第四电感依次连接，第五电感、第六电感、第七电感、第八电感依次连接，第五电容的一端连接在第一电感与第二电感之间，第五电容的另一端连接在第五电感与第六电感之间，第六电容的一端连接在第二电感与第三电感之间，第六电容的另一端连接在第六电感与第七电感之间，第七电容的一端连接在第三电感与第四电感之间，第七电容的另一端连接在第七电感与第八电感之间。其中所有的电感的感值为4.7mH，第五电容、第六电容以及第七电容的电容值均为0.68μF，其截止特性为，当小于1KHz时，衰减小于0.3dB，当处于30KHz到500KHz时，衰减大于100dB。The low-pass filter is a 7-order Butterworth structure, as shown in Figure 2, including the first inductor, the second inductor, the third inductor, the fourth inductor, the fifth inductor, the sixth inductor, the seventh inductor, the The eight inductors, the fifth capacitor, the sixth capacitor and the seventh capacitor, the first inductor, the second inductor, the third inductor, and the fourth inductor are connected in sequence, and the fifth inductor, the sixth inductor, the seventh inductor, and the eighth inductor are connected in sequence , one end of the fifth capacitor is connected between the first inductor and the second inductor, the other end of the fifth capacitor is connected between the fifth inductor and the sixth inductor, and one end of the sixth capacitor is connected between the second inductor and the third inductor Between, the other end of the sixth capacitor is connected between the sixth inductance and the seventh inductance, one end of the seventh capacitor is connected between the third inductance and the fourth inductance, and the other end of the seventh capacitor is connected between the seventh inductance and the Between the eighth inductor. The inductance value of all the inductors is 4.7mH, the capacitance values of the fifth capacitor, the sixth capacitor and the seventh capacitor are all 0.68μF, and the cut-off characteristic is that when it is less than 1KHz, the attenuation is less than 0.3dB, and when it is between 30KHz and 500KHz , the attenuation is greater than 100dB.
如图3所示，匹配衰减网络其具体包括第一电容、第二电容、第三电容、第四电容、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第八电阻、第一放电管以及第二放电管，第一电容、第一电阻、第六电阻、第二电阻以及第二电容依次连接，第三电容、第三电阻、第七电阻、第四电阻以及第四电容依次连接，第五电阻一端连接在第一电阻与第六电阻之间，第五电阻另一端连接在第三电阻与第七电阻之间，第八电阻一端连接在第六电阻与第二电阻之间，第八电阻另一端连接在第七电阻与第四电阻之间，第一放电管一端连接在第一电容与第一电阻之间，第一放电管另一端连接在第三电容与第三电阻之间，第二放电管一端连接在第二电阻与第二电容之间，第二放电管另一端连接在第四电阻与第四电容之间。其中，第一电容、第二电容、第三电容以及第四电容的电容值为0.47μF，第一电阻、第二电阻、第三电阻以及第四电阻的阻值为51欧姆，第六电阻以及第七电阻的阻值为100欧姆，第五电阻以及第八电阻的阻值为5.1欧姆，整体的匹配衰减网络可以作为信号衰减通道，在30KHz到500KHz之间提供固定65dB衰减。As shown in Figure 3, the matching attenuation network specifically includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth The resistor, the seventh resistor, the eighth resistor, the first discharge tube and the second discharge tube, the first capacitor, the first resistor, the sixth resistor, the second resistor and the second capacitor are connected in sequence, the third capacitor, the third resistor, The seventh resistor, the fourth resistor and the fourth capacitor are connected in sequence, one end of the fifth resistor is connected between the first resistor and the sixth resistor, the other end of the fifth resistor is connected between the third resistor and the seventh resistor, and the eighth resistor One end is connected between the sixth resistor and the second resistor, the other end of the eighth resistor is connected between the seventh resistor and the fourth resistor, one end of the first discharge tube is connected between the first capacitor and the first resistor, and the first discharge tube is connected between the first capacitor and the first resistor. The other end of the tube is connected between the third capacitor and the third resistor, one end of the second discharge tube is connected between the second resistor and the second capacitor, and the other end of the second discharge tube is connected between the fourth resistor and the fourth capacitor. Wherein, the capacitance value of the first capacitor, the second capacitor, the third capacitor and the fourth capacitor is 0.47 μF, the resistance value of the first resistor, the second resistor, the third resistor and the fourth resistor is 51 ohms, the sixth resistor and The resistance of the seventh resistor is 100 ohms, and the resistance of the fifth and eighth resistors is 5.1 ohms. The overall matching attenuation network can be used as a signal attenuation channel to provide a fixed 65dB attenuation between 30KHz and 500KHz.
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| CN201820911991.2U CN208128207U (en) | 2018-06-13 | 2018-06-13 | A kind of attenuator based on G3 frequency band electric line communication system |
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| CN201820911991.2U CN208128207U (en) | 2018-06-13 | 2018-06-13 | A kind of attenuator based on G3 frequency band electric line communication system |
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