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Energy meter supplied by an m-bus

A technology of energy meters and electric power, applied in the field of energy meters, can solve problems such as insufficient application

Inactive Publication Date: 2012-05-30
ITRON FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even for a configuration of two load cells, i.e. 3mA, the usable power is a maximum of 9mW and is therefore insufficient for the intended application

Method used

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  • Energy meter supplied by an m-bus
  • Energy meter supplied by an m-bus

Examples

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Embodiment Construction

[0022] image 3 is a block diagram showing the relationship between the TSS721A type integrated circuit 1 and the calculation module 2 of the heat meter according to the present invention. For the function of communicating with the M-bus (not shown in the figure), as a rule, the TXI connection of the integrated circuit 1 is connected to the RX-0 and TX-0 connections of the computing module 2 through a galvanically isolated optocoupler 3, respectively .

[0023] For the power supply function using power from the M-bus, according to the invention, the energy meter further comprises a power supply module comprising a direct current to direct current (DC-DC) converter 4 for electrical isolation, wherein the converter 4 connects its input to the delivery DC The output of the integrated circuit 1 of the (DC) voltage signal is connected and has a duty cycle adjusted by the DC voltage signal, as explained in more detail below. The backup module 5 consisting of storage ultracapacitor...

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Abstract

The invention relates to an energy meter, in particular for thermal energy, suitable for remotely exchanging data over an M-bus link, the energy meter including a computer module suitable for being powered via the M-bus link, and an integrated circuit (1) suitable, on the one hand, for acting as a communication interface between the computer module and the M-bus link and, on the other hand, for outputting a direct-current signal for supplying the computer module over an output connection (10). According to the invention, the energy meter also comprises a power-supply module (4) including a galvanically insulated DC-DC converter with the input thereof connected to said output connection (10) and the duty factor thereof regulated by the direct-current signal.

Description

technical field [0001] The present invention relates to the field of energy meters, in particular to thermal energy meters, and more particularly to energy meters capable of exchanging serial data with a master device via an M-bus type bus. Background technique [0002] M-bus (short for "Meter Bus") is a recent European standard that enables remote reading of energy meters, especially electricity or heat meters. [0003] In order to be able to exchange serial data over the M-bus, such an energy meter has a communication interface with the M-bus, wherein the interface is currently in the form of an integrated circuit element sold by Texas Instruments as model TSS721 or TSS721A. [0004] figure 1 is the functional diagram of the TSS721 integrated circuit, and figure 2 An example of how the integrated circuit can be used as an interface for format conversion between the computing device of the energy meter and the M-bus is shown. Integrated circuits have a certain number of...

Claims

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Application Information

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IPC IPC(8): G01D4/02G08C19/02
CPCG01D4/02Y04S20/30Y02B90/20
Inventor 弗雷德里克·斯托布埃尔韦·迪里
Owner ITRON FRANCE
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