CN205176133U

CN205176133U - Electric energy meter based on SOC measures chip

Info

Publication number: CN205176133U
Application number: CN201521029326.3U
Authority: CN
Inventors: 曹彦双; 李斌; 杨旺; 李强; 胡侠初; 李军; 陈涌; 田仲平
Original assignee: Wasion Group Co Ltd
Current assignee: Wasion Group Co Ltd
Priority date: 2015-12-14
Filing date: 2015-12-14
Publication date: 2016-04-20
Anticipated expiration: 2025-12-14

Abstract

The utility model provides an electric energy meter based on SOC measures chip, including current sampling circuit, voltage sampling circuit, analog -to -digital conversion chip, power module, SOC measurement chip and isolation transformer, the analog -to -digital conversion chip is only connected through isolation transformer of the same kind and SOC measurement chip, and the power of analog -to -digital conversion chip and the data interchange of analog -to -digital conversion chip and SOC measurement chip all pass through isolation transformer keeps apart and transmits. The utility model provides an electric energy meter based on SOC measures chip, the power supply of analog -to -digital conversion chip only through isolation transformer and analog -to -digital conversion chip connection all the way, is given to SOC measurement chip, also carries out data transmission with the analog -to -digital conversion chip simultaneously, only adopt all the way isolation transformer to connect and keep apart SOC measurement chip and analog -to -digital conversion chip, it is lower to compare the prior art cost, and the circuit is simpler, and circuit fault is rateed and is obviously reduced.

Description

Based on the electric energy meter of SOC computation chip

Technical field

The utility model is specifically related to a kind of electric energy meter based on SOC computation chip.

Background technology

Along with the high speed development of economic construction, the power consumption of user is increasing, also more and more higher to the function of ammeter, performance requirement, and to big current, wide region metering, anti-external magnetic field, anti-direct current be saturated etc., performance is favored day by day in ammeter market in recent years.But current domestic most single-phase meter all adopts traditional electromagnetic current transducer to gather current signal, and these CT generally all exist to a certain degree non-linear, be there is to saturated phenomenon, the interference of external magnetic field cannot be suppressed in the current signal of transition and the AC signal containing flip-flop, these all have a strong impact on the measuring accuracy of ammeter.

SOC electric energy computation chip uses on a large scale in electric energy metrical field, utilize SOC electric energy computation chip significantly can reduce the cost of parts of ammeter and the complexity of system and power consumption, and promote overall stability and meter accuracy, and can reduce part stock complexity, make system simplification and accelerate the speed of Renewal Design, more easy debug and hardware development, reduce the mutual interference of chip and chip chamber, the degree of stability of elevator system, make the complexity reduction etc. of software development.

At present, the applied function module figure of SOC electric energy computation chip in electric energy meter as shown in Figure 1: A phase/B phase/C phase current sampling circuit by after modulus conversion chip, then is connected with SOC computation chip by isolation module; But as we can see from the figure, modulus conversion chip and SOC computation chip need to be isolated by three road isolation modules, are respectively transmission isolation module, receive isolation module and reset isolation module, modulus conversion chip also needs independent power supply simultaneously.Obviously there is circuit complexity, cost is high, failure rate is high problem in current this SOC electric energy metrical electric energy meter.

Utility model content

The purpose of this utility model is to provide the electric energy meter based on SOC computation chip that a kind of circuit is simple, with low cost, fault rate is low.

This electric energy meter based on SOC computation chip that the utility model provides, comprise current sampling circuit, voltage sampling circuit, modulus conversion chip, power module, SOC computation chip and isolating transformer, modulus conversion chip is connected with SOC computation chip by means of only a road isolating transformer, and the exchanges data of the power supply of modulus conversion chip and modulus conversion chip and SOC computation chip is all undertaken isolating and transmitting by described isolating transformer.

The model of described SOC computation chip is Max71315s.

The model of described modulus conversion chip is 71M6601.

Described isolating transformer is pulse transformer.

The described electric energy meter based on SOC computation chip also comprises built-in relay, and built-in relay is connected with SOC computation chip, for being cut off the electric power supply of user when subscriber arrearage by remote controlled manner.

The described electric energy meter based on SOC computation chip also comprises Zigbee module, and Zigbee module is connected with SOC computation chip, for carrying out telecommunication with external unit.

The described electric energy meter based on SOC computation chip also comprises the infrared circuit of absorption, adsorbs infrared circuit and is connected with SOC computation chip, for the data interaction of electric energy meter.

The described electric energy meter based on SOC computation chip also comprises serial port module, and serial port module is connected with SOC computation chip, for the serial communication of electric energy meter.

This electric energy meter based on SOC computation chip that the utility model provides, SOC computation chip by superposing the technology of carrier wave on base frequency, be connected with modulus conversion chip by isolating transformer, power to modulus conversion chip, also carry out data transmission with modulus conversion chip simultaneously; The utility model only adopts a road isolating transformer to be connected with modulus conversion chip SOC computation chip and to isolate, and cost is lower compared to existing technologies, and circuit is more simple, and fault rate obviously reduces.

Accompanying drawing explanation

Fig. 1 is the functional block diagram of background technology single-phase electric energy meter.

Fig. 2 is the functional block diagram of a kind of specific embodiment of the utility model electric energy meter.

Embodiment

Be illustrated in figure 2 the functional block diagram of a kind of specific embodiment of the utility model electric energy meter: the electric energy meter of this embodiment comprises current sampling circuit, voltage sampling circuit, modulus conversion chip, power module, SOC computation chip, isolating transformer, built-in relay, Zigbee module, the infrared circuit of absorption and serial port module; Current sampling circuit comprises A phase/B phase/C phase manganin current sampling circuit; Voltage sampling circuit comprises A phase/B phase/C phase voltage sample circuit; A phase/B phase/C phase voltage sample circuit is directly directly connected with SOC computation chip; A phase/B phase/C phase manganin current sampling circuit is connected with modulus conversion chip, after the simulating signal of current sampling circuit is converted to digital signal by modulus conversion chip, then is connected with SOC computation chip by an isolating transformer; The data of the power supply of modulus conversion chip, modulus conversion chip and SOC computation chip are transmitted and are all completed by described isolating transformer.

Built-in relay is connected with SOC computation chip, for being cut off the electric power supply of user when subscriber arrearage by remote controlled manner; Zigbee module is connected with SOC computation chip, for carrying out telecommunication with external unit; Adsorb infrared circuit to be connected with SOC computation chip, for the data interaction of electric energy meter; Serial port module is connected with SOC computation chip, for the serial communication of electric energy meter.

The model of SOC computation chip is Max71315s.

The model of modulus conversion chip is 71M6601.

Isolating transformer is pulse transformer.

This electric energy meter based on SOC computation chip that the utility model provides, SOC computation chip by superposing the technology of carrier wave on base frequency, be connected with modulus conversion chip by isolating transformer, power to modulus conversion chip, also carry out data transmission with modulus conversion chip simultaneously.

Claims

1. the electric energy meter based on SOC computation chip, comprise current sampling circuit, voltage sampling circuit, modulus conversion chip, power module, SOC computation chip and isolation module, it is characterized in that isolation module adopts a road isolating transformer, modulus conversion chip is connected with SOC computation chip by described isolating transformer, and the exchanges data of the power supply of modulus conversion chip and modulus conversion chip and SOC computation chip is all undertaken isolating and transmitting by described isolating transformer.

2. the electric energy meter based on SOC computation chip according to claim 1, is characterized in that the model of described SOC computation chip is Max71315s.

3. the electric energy meter based on SOC computation chip according to claim 1, is characterized in that the model of described modulus conversion chip is 71M6601.

4. the electric energy meter based on SOC computation chip according to claim 1, is characterized in that described isolating transformer is pulse transformer.

5. according to the electric energy meter based on SOC computation chip one of claim 1 ~ 4 Suo Shu, it is characterized in that the described electric energy meter based on SOC computation chip also comprises built-in relay, built-in relay is connected with SOC computation chip, for being cut off the electric power supply of user when subscriber arrearage by remote controlled manner.

6. according to the electric energy meter based on SOC computation chip one of claim 1 ~ 4 Suo Shu, it is characterized in that the described electric energy meter based on SOC computation chip also comprises Zigbee module, Zigbee module is connected with SOC computation chip, for carrying out telecommunication with external unit.

7. according to the electric energy meter based on SOC computation chip one of claim 1 ~ 4 Suo Shu, it is characterized in that the described electric energy meter based on SOC computation chip also comprises the infrared circuit of absorption, adsorb infrared circuit to be connected with SOC computation chip, for the data interaction of electric energy meter.

8., according to the electric energy meter based on SOC computation chip one of claim 1 ~ 4 Suo Shu, it is characterized in that the described electric energy meter based on SOC computation chip also comprises serial port module, serial port module is connected with SOC computation chip, for the serial communication of electric energy meter.