CN205506932U - Complete miniature three -phase kilowatt -hour meter of copper -manganese - Google Patents

Complete miniature three -phase kilowatt -hour meter of copper -manganese Download PDF

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Publication number
CN205506932U
CN205506932U CN201620109785.0U CN201620109785U CN205506932U CN 205506932 U CN205506932 U CN 205506932U CN 201620109785 U CN201620109785 U CN 201620109785U CN 205506932 U CN205506932 U CN 205506932U
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China
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phase
unit
manganese
chip
copper
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CN201620109785.0U
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Chinese (zh)
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田家彩
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Qingdao High Tech Communication Co ltd
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Qingdao High Tech Communication Co ltd
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Abstract

The utility model discloses a complete miniature three -phase kilowatt -hour meter of copper -manganese, including MCU unit, power supply circuit, measurement unit, clock unit and memory cell, the measurement unit is including connecting in 3 isolation AD pick -up chip and 1 measurement chip of MCU unit, and A phase electric current circuit, B phase electric current circuit and C phase electric current circuit be an external copper -manganese piece respectively, and the A looks current path who forms, B looks current path and C looks current path's signal is respectively by one it gathers to keep apart AD pick -up chip, keep apart AD pick -up chip pass through communication interface connect in the measurement chip, clock unit and memory cell all connect in the MCU unit. The utility model discloses have measurement function, electrical energy storage function, RS485 communication function, divide period measurement function etc. Abandon the current transformer tradition current sample scheme that the three -phase table was standardized to state's net, avoided because the miniaturation design can be carried out with showing to count the volume to current transformer's bulky problem.

Description

A kind of complete miniature three-phase kilowatt-hour meter of copper-manganese
Technical field
This utility model relates to power domain, is specifically related to a kind of complete miniature three-phase kilowatt-hour meter of copper-manganese.
Background technology
Along with the development of China's economic, the demand of electric energy is also continuously increased, huge electric energy city Field demand is that the development of electric energy meter industry brings opportunity.Recent years, three-phase kilowatt-hour meter is in the whole nation In the range of popularization and application, the demand of three phase metering table meter is also continuously increased by all trades and professions, The new forms of energy industry great development that particularly country promotes energetically, such as electric automobile charging pile etc..By The promotion to three-phase meter meter in Guo Wang company, these application are the most a lot of the most directly selects states' network planning The three-phase meter meter of model, but the three-phase meter specification that Guo Wang company customizes according to oneself development plan, Function is various, and a lot of occasion mainly uses copy reading to measure electric energy function, causes certain journey The waste of degree, and volume is big, is inconvenient to install for some application, it addition, the electricity selected Current transformer sampling plan exists that direct current is the most saturated, be easily subject to constant magnetic interference, metering Error becomes big problem.
Utility model content
For the deficiencies in the prior art, this utility model aims to provide the full copper-manganese of a kind of low cost Miniature three-phase meter, has function of measuring, electric energy storage function, RS485 communication function, timesharing Section function of measuring etc., abandon the current transformer conventional current sampling side of state's network planning model three-phase meter Case, it is to avoid due to the bulky problem of current transformer, can carry out micro-by table meter volume Typeization designs.
To achieve these goals, this utility model adopts the following technical scheme that
A kind of complete miniature three-phase kilowatt-hour meter of copper-manganese, including MCU unit and connected power supply electricity Road;Also include metering units, clock unit and memory element;Wherein, described metering units bag Include 3 isolation AD acquisition chips and 1 computation chip, the A being connected to described MCU unit Phase current circuit, a B phase current circuit and C phase current circuit external copper-manganese sheet respectively, The signal of the A phase current path, B phase current path and the C phase current path that are formed is respectively It is acquired by a described isolation AD acquisition chip;Described isolation AD acquisition chip is by logical Letter interface is connected to described computation chip;Described clock unit and memory element are all connected to described MCU unit.
As preferably, the described miniature three-phase kilowatt-hour meter of full copper-manganese also includes that a RS485 communication unit is even It is connected to described MCU unit.By described RS485 communication unit, the described miniature three-phase of full copper-manganese Ammeter can carry out data transmission with External memory equipment, control equipment or display device, enters one Step enhances the functional diversities of the described miniature three-phase kilowatt-hour meter of full copper-manganese, is more easy to adapt to various use Occasion.
As preferably, described clock unit is also attached to a power down power supply circuit of clock.Described fall Electricity power supply circuit of clock is powered for continuing as clock unit when power is off, it is to avoid clock unit breaks Electricity causes the situation of system time mistake.
As preferably, the described miniature three-phase kilowatt-hour meter of full copper-manganese also include pulse per second (PPS) output circuit and Pulse output circuit.Described pulse per second (PPS) output circuit and pulse output circuit are respectively used to inspection Survey time accuracy error and for electric energy metering error calibration and detection.
The beneficial effects of the utility model are:
1, function is terse, mainly realizes the functions such as metering, storage, communication, fully meets new Three-phase meter functional requirement, easy to maintenance;
2, due to the simplification of circuit function, and after using full copper-manganese scheme, whole table can do To miniaturization, not only cost declines to a great extent, but also can be calculated as guide rail according to actually used situation The forms such as formula, are used in the application of different occasion;
3, full copper-manganese scheme advantage: just copper-manganese can be carried out temperature by built-in temperature sensor Degree compensates, and without magnetic material, is not affected by stationary magnetic field;Different alternate Complete Synchronizations Sampling, will not introduce alternate angular difference;The iCoupler digital signal isolation technology used, no Angular difference between voltage/current can be introduced;Do not exist under DC component and be rapidly saturated and affect error Problem.
Accompanying drawing explanation
Fig. 1 is principle schematic block diagram of the present utility model;
Fig. 2 is metering units circuit diagram;
Fig. 3, Fig. 4, Fig. 5 and Fig. 6 are respectively upper left in Fig. 2, upper right, lower-left and bottom right The enlarged diagram of four parts;
Fig. 7 is storage unit circuit schematic diagram;
Fig. 8 is RS485 communication unit circuit diagram;
Fig. 9 is clock unit circuit diagram;
Figure 10 is power down power supply circuit of clock schematic diagram;
Figure 11 and Figure 12 is respectively pulse per second (PPS) output circuit schematic diagram and pulse output circuit Schematic diagram.
Detailed description of the invention
Below with reference to accompanying drawing, the utility model will be further described, it should be noted that The present embodiment, premised on the technical program, gives detailed embodiment and concrete operation Process, but protection domain of the present utility model is not limited to the present embodiment.
As it is shown in figure 1, a kind of complete miniature three-phase kilowatt-hour meter of copper-manganese, connect including MCU unit with it The power circuit connect;Also include metering units, clock unit and memory element;Wherein, described Metering units includes 3 that are connected to MCU unit and isolates AD acquisition chips and 1 metering core Sheet, A phase current circuit, a B phase current circuit and C phase current circuit external manganese respectively Copper sheet, the A phase current path formed, B phase current path and the letter of C phase current path Number it is acquired by a described isolation AD acquisition chip respectively;Described isolation AD acquisition chip It is connected to described computation chip by communication interface;Described clock unit and memory element are all connected with In described MCU unit.
As shown in Fig. 2-Fig. 6, in described metering units, 3 isolation AD acquisition chips are adopted Isolating AD acquisition chip with the ADE7933 of ADI company of the U.S., computation chip then uses the U.S. The ADE7978 chip of ADI company.IB+, IB-and C of IA+, IA-of A phase, B phase IC+, IC-of phase external copper-manganese sheet respectively, by 3 AED7933 sampling three-phase respectively The signal of ABC current path, issues ADE7978 by ADI special communication mouth after isolation Chip carries out signal processing, it is achieved voltage, electric current, power, electric energy and electrical energy pulse, waveform The functions such as output, complete the monitoring of electricity quality for MCU unit and electric energy are accumulative etc..
In the present embodiment, memory element includes the EEprom of 3 512Kbit capacity, as Shown in Fig. 7, EEprom uses IIC communication modes, for store accumulative electric flux, point Time electricity, requirement, logout, the information such as freeze.Can be according to user couple in side circuit Related data amount demand, selects actual EEprom capacity and sheet number.
In the present embodiment, as it is shown in figure 9, described clock unit uses clock chip RX8325T, uses IIC communication, is mainly used in providing date-time timing, for being to system System time-sharing measurement provides time reference.
As preferably, the described miniature three-phase kilowatt-hour meter of full copper-manganese also includes that a RS485 communication unit is even It is connected to described MCU unit.Described RS485 communication unit is for reading the information in table, or group Net, facilitates the management of polylith three-phase kilowatt-hour meter.As shown in Figure 8, RS485 communication unit circuit is adopted By double optocoupler schemes, cost-effective, external interface circuit still uses pressure-sensitive and temperature-sensitive protection.
As preferably, described clock unit is also attached to a power down power supply circuit of clock.This circuit Power for clock chip RX8325T after power down, as shown in Figure 10, it is ensured that the feelings of power down Under condition, clock is properly functioning.
As preferably, the described miniature three-phase kilowatt-hour meter of full copper-manganese also include pulse per second (PPS) output circuit (as Shown in Figure 11) and pulse output circuit (as shown in figure 12), when being respectively used to detection Between accuracy error and for electric energy metering error calibration and detection.
For a person skilled in the art, can make according to above technical scheme and design Various corresponding changes and deformation, and all these changes and deformation should be construed as being included in this reality Within novel scope of the claims.

Claims (4)

1. the miniature three-phase kilowatt-hour meter of full copper-manganese, including MCU unit and connected power supply Circuit;It is characterized in that, also include metering units, clock unit and memory element;Wherein, Described metering units includes the 3 isolation AD acquisition chips and 1 being connected to described MCU unit Sheet computation chip, outside A phase current circuit, B phase current circuit and C phase current circuit difference Connect a copper-manganese sheet, A phase current path, B phase current path and the C phase current formed The signal of path is acquired by a described isolation AD acquisition chip respectively;Described isolation AD Acquisition chip is connected to described computation chip by communication interface;Described clock unit and storage are single Unit is all connected to described MCU unit.
The miniature three-phase kilowatt-hour meter of full copper-manganese the most according to claim 1, it is characterised in that Also include that a RS485 communication unit is connected to described MCU unit.
The miniature three-phase kilowatt-hour meter of full copper-manganese the most according to claim 1, it is characterised in that Described clock unit is also attached to a power down power supply circuit of clock.
The miniature three-phase kilowatt-hour meter of full copper-manganese the most according to claim 1, it is characterised in that Also include pulse per second (PPS) output circuit and pulse output circuit.
CN201620109785.0U 2016-02-03 2016-02-03 Complete miniature three -phase kilowatt -hour meter of copper -manganese Active CN205506932U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620109785.0U CN205506932U (en) 2016-02-03 2016-02-03 Complete miniature three -phase kilowatt -hour meter of copper -manganese

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620109785.0U CN205506932U (en) 2016-02-03 2016-02-03 Complete miniature three -phase kilowatt -hour meter of copper -manganese

Publications (1)

Publication Number Publication Date
CN205506932U true CN205506932U (en) 2016-08-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620109785.0U Active CN205506932U (en) 2016-02-03 2016-02-03 Complete miniature three -phase kilowatt -hour meter of copper -manganese

Country Status (1)

Country Link
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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: An all manganese copper miniature three phase ammeter

Effective date of registration: 20210706

Granted publication date: 20160824

Pledgee: Qingdao high technology financing Company limited by guarantee

Pledgor: QINGDAO HIGH-TECH COMMUNICATION Co.,Ltd.

Registration number: Y2021370010046

PE01 Entry into force of the registration of the contract for pledge of patent right