CN2884212Y - Electric power meter by using copper-manganese current-diverter for current sampling - Google Patents
Electric power meter by using copper-manganese current-diverter for current sampling Download PDFInfo
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- CN2884212Y CN2884212Y CN 200620006650 CN200620006650U CN2884212Y CN 2884212 Y CN2884212 Y CN 2884212Y CN 200620006650 CN200620006650 CN 200620006650 CN 200620006650 U CN200620006650 U CN 200620006650U CN 2884212 Y CN2884212 Y CN 2884212Y
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- electric energy
- energy meter
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Abstract
The utility model relates to a watt-hour meter and a current sampling circuit of the watt-hour meter, comprising a watt-hour meter. The three-phase input terminals of a three-phase electric watt-hour meter are respectively connected with the signal input terminals of a manganin shunt, and the signal output terminals of the manganin shunt are respectively connected with the signal input terminals of a measurement chip. The utility model has the advantages that: firstly, the current sampling formed by a current transformer is superseded by the shunt, the three-phase circuit is separately measured and the three-phase pulse is processed uniformly by the MCU, so not only the direct current component and even harmonic can be resisted availably, but also the external strong electromagnetic interference can be resisted availably; secondly, the utility model has compact size and low cost.
Description
Technical field:
The utility model relates to a kind of electric energy meter electric current sample circuit and electric energy meter thereof, belongs to electric energy meter and makes the field.
Background technology:
What the current sampling circuit of existing electric energy meter adopted is current transformer.The weak point of its existence: the one, because current transformer exists magnetic field to transmit energy, therefore metering accuracy and the precision to electric energy meter produces harmful effect, need install the antimagnetic shield device additional during use; The 2nd, volume is big, consumptive material is many, cost is high; The 3rd, the energy consumption height.
Summary of the invention:
Purpose of design: avoid the weak point in the background technology, design a kind of magnetic field that do not exist and transmit energy, the electric energy meter electric current sample circuit that volume is little, consumptive material is few, cost is low, energy consumption is little.
Design proposal:, adopt the new shunt (manganese copper diverter) of low price that adopts of this practicality and replace current transformer to constitute the current signal collector of three-phase electric energy meter in order to realize above-mentioned purpose of design.Because manganese copper diverter does not exist magnetic field to transmit energy, DC component need not to add in addition protecting component and can disturb immunity to outside high-intensity magnetic field the influence of electric energy meter metering in the electric current during use because of having eliminated fully; Secondly, because the shunt volume is little, this current sample scheme of sampling can reduce the size showing to count, reduce raw materials consumption, compare with current transformer, this advantage on cost of shunt is fairly obvious, also surpasses the requirement of IEC62053-21 standard in accuracy, aspect stable, and its shunt uses in class of accuracy is 1 grade, 2 grades the direct access type table of three-phase meter has good prospect.Its technical scheme: adopt the electric energy meter of manganese copper diverter as current sample, it comprises electric energy meter, the three-phase end of incoming cables of three-phase electric energy meter connects the signal input part of manganese copper diverter respectively, and the signal output part of manganese copper diverter connects the signal input part of computation chip respectively.
The utility model is compared with background technology, the one, adopt shunt to replace the current sampling circuit that current transformer constituted, three-phase circuit is metering separately, and three-phase pulse is handled by MCU is unified, can not only anti-effectively DC component and even-order harmonic, and can resist outside strong magnetic interference effectively; The 2nd, volume is little, and cost is low.
Description of drawings:
Fig. 1 is the structure block diagram of three-phase electric energy meter.
Embodiment:
Embodiment 1: with reference to accompanying drawing 1.Adopt the three-phase electric energy meter of manganese copper diverter as current sample, the formation of electric energy meter structure and circuit is a prior art, is not described herein at this, and the application only narrates the current sampling circuit of electric energy meter.Accompanying drawing 1 is a three-phase electric energy meter frame structure synoptic diagram.The three-phase end of incoming cables of three-phase electric energy meter connects the signal input part of manganese copper diverter respectively, and the signal output part of manganese copper diverter connects the signal input part of computation chip respectively.The three-phase end of incoming cables of three-phase electric energy meter is the signal input part of connecting resistance network respectively, and the signal output part of resistor network connects the signal input part of computation chip respectively.Its principle is as follows: with the three-phase and four-line circuit is example, and A measures electric current mutually and produces a voltage signal V1 at the two ends of shunt, being in proportion of this voltage signal and electric current; Simultaneously the phase voltage of A phase obtains signal V2 after by a resistor network step-down, and V1 and V2 deliver in the computation chip, carries out digital multiply and low pass in computation chip inside and handles and can obtain the A with the proportional pulse output of actual consumption electric weight Pulse; Equally, B phase metering circuit obtains Pulse B, and C phase metering circuit obtains Pulse C, delivers to MCU behind three tunnel pulses process frequency division buffer circuit and handles, and obtains information about power on display module.
What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these explanations are just to simple declaration of the present utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection domain of the present utility model.
Claims (3)
1, a kind of electric energy meter that adopts manganese copper diverter as current sample, it comprises electric energy meter, it is characterized in that: the three-phase end of incoming cables of three-phase electric energy meter connects the signal input part of manganese copper diverter respectively, and the signal output part of manganese copper diverter connects the signal input part of computation chip respectively.
2, employing manganese copper diverter according to claim 1 is as the electric energy meter of current sample, it is characterized in that: the three-phase end of incoming cables of three-phase electric energy meter is the signal input part of connecting resistance network respectively, and the signal output part of resistor network connects the signal input part of computation chip respectively.
3, employing manganese copper diverter according to claim 1 is characterized in that as the electric energy meter of current sample: the two ends of manganese copper diverter produce being in proportion of a voltage signal and voltage signal and electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620006650 CN2884212Y (en) | 2006-04-03 | 2006-04-03 | Electric power meter by using copper-manganese current-diverter for current sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620006650 CN2884212Y (en) | 2006-04-03 | 2006-04-03 | Electric power meter by using copper-manganese current-diverter for current sampling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2884212Y true CN2884212Y (en) | 2007-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620006650 Expired - Lifetime CN2884212Y (en) | 2006-04-03 | 2006-04-03 | Electric power meter by using copper-manganese current-diverter for current sampling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2884212Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338816A (en) * | 2011-06-17 | 2012-02-01 | 杭州炬华科技股份有限公司 | Resistance-capacitance power supply for tri-manganin electric energy meter |
| CN102375091A (en) * | 2010-08-18 | 2012-03-14 | 深圳长城开发科技股份有限公司 | Three-phase measurement circuit |
| CN102809729A (en) * | 2012-05-11 | 2012-12-05 | 武汉中原电子集团有限公司 | Electricity metering device for power battery |
| CN103018510A (en) * | 2012-07-10 | 2013-04-03 | 郭建国 | Isolated serial peripheral interface (SPI) bus electric energy measuring module and APLC electricity meter |
| CN106018985A (en) * | 2016-05-17 | 2016-10-12 | 深圳市思达仪表有限公司 | Voltage negative phase sequence detection method and system for three-phase electric energy meter |
| WO2018053726A1 (en) * | 2016-09-21 | 2018-03-29 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
| CN110794207A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Three-phase manganin sampling alternating current guide rail meter |
| CN116223903A (en) * | 2023-05-06 | 2023-06-06 | 烟台东方威思顿电气有限公司 | Anti-interference circuit and method for three-phase three-wire electric energy meter under alternating current magnetic field |
-
2006
- 2006-04-03 CN CN 200620006650 patent/CN2884212Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375091A (en) * | 2010-08-18 | 2012-03-14 | 深圳长城开发科技股份有限公司 | Three-phase measurement circuit |
| CN102375091B (en) * | 2010-08-18 | 2015-05-06 | 深圳长城开发科技股份有限公司 | Three-phase measurement circuit |
| CN102338816A (en) * | 2011-06-17 | 2012-02-01 | 杭州炬华科技股份有限公司 | Resistance-capacitance power supply for tri-manganin electric energy meter |
| CN102338816B (en) * | 2011-06-17 | 2013-06-05 | 杭州炬华科技股份有限公司 | Resistance-capacitance power supply for tri-manganin electric energy meter |
| CN102809729A (en) * | 2012-05-11 | 2012-12-05 | 武汉中原电子集团有限公司 | Electricity metering device for power battery |
| CN102809729B (en) * | 2012-05-11 | 2016-01-13 | 武汉中原电子集团有限公司 | A kind of electrokinetic cell electric quantity metering device |
| CN103018510B (en) * | 2012-07-10 | 2015-11-18 | 郭建国 | Isolation spi bus electric energy metering module and APLC ammeter thereof |
| CN103018510A (en) * | 2012-07-10 | 2013-04-03 | 郭建国 | Isolated serial peripheral interface (SPI) bus electric energy measuring module and APLC electricity meter |
| CN106018985A (en) * | 2016-05-17 | 2016-10-12 | 深圳市思达仪表有限公司 | Voltage negative phase sequence detection method and system for three-phase electric energy meter |
| WO2018053726A1 (en) * | 2016-09-21 | 2018-03-29 | 深圳市思达仪表有限公司 | Method for generating pulses by double manganin sampling circuits of single-phase three-wire electric energy meter |
| CN110794207A (en) * | 2019-11-14 | 2020-02-14 | 浙江晨泰科技股份有限公司 | Three-phase manganin sampling alternating current guide rail meter |
| CN116223903A (en) * | 2023-05-06 | 2023-06-06 | 烟台东方威思顿电气有限公司 | Anti-interference circuit and method for three-phase three-wire electric energy meter under alternating current magnetic field |
| CN116223903B (en) * | 2023-05-06 | 2023-09-19 | 烟台东方威思顿电气有限公司 | Anti-interference circuit and method for three-phase three-wire electric energy meter under alternating current magnetic field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU PAX-HUALONG ELECTRONIC TECHNOLOGY CO., LT Free format text: FORMER NAME OR ADDRESS: HUALONG ELECTRONIC TECHNOLOGY CO., LTD., HANGZHOU |
|
| CP03 | Change of name, title or address |
Address after: 310018 No. 14, No. 17, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Patentee after: Hangzhou Baifu Hualong Electronic Technology Co., Ltd. Address before: 310018, No. 12, No. 15, Hangzhou economic and Technological Development Zone (Xiasha), Zhejiang, Hangzhou Patentee before: Hualong Electronic Technology Co., Ltd., Hangzhou |
|
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU BAIFU ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: HANGZHOU PAX-HUALONG ELECTRONIC TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: No. 14, No. 17, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Province, China: 310018 Patentee after: Hangzhou PAX Electronic Technology Co., Ltd. Address before: No. 14, No. 17, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Province, China: 310018 Patentee before: Hangzhou Baifu Hualong Electronic Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 310018 No. 12, No. 500, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Patentee after: Hangzhou PAX Electronic Technology Co., Ltd. Address before: 310018 No. 14, No. 17, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Patentee before: Hangzhou PAX Electronic Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070328 |
|
| EXPY | Termination of patent right or utility model |