Three-phase electrical energy computation chip based on NIOS II microprocessor

Abstract

The invention provides a three-phase electric energy gauge based on NIOS II microprocessor, comprising: AD controller, first-in first-out data buffer, electric energy measuring and configurating register, NIOS II flexible core microprocessor, calendar clock interface, digital frequency transformer, IIC interface and LCD controller. Input of AD controller is collected three phase voltage and three phase current, namely serial data of six channels. The AD controller transfers the serial data into parallel data and stores the parallel data in the first-in first-out dada buffer. The first-in first-out data buffer stores the AD data. The electric energy measuring module realizes power active, reactive and apparent energy metering. The configurating register stores configuration data, history electric quantity data, freezing data. The NIOS II flexible core microprocessor dispatches the electric energy measuring chip. The calendar clock interface is connected with the outside calendar clock chip. The digital frequency transformer transfers the electric energy into pulse to output. The IIC interface controls the outside IIC read-only memory. The LCD controller drives the outside LCD.

Description

(1) Technical field: [0001] A kind of three-phase electric energy metering SOPC (System On Programmable Chip) chip based on the NIOS II microprocessor of the present invention, especially refers to integrated all core circuits (microprocessor, electric energy metering chip, various control chips) required by the three-phase electric energy meter device and communication interface, etc.), the designer can flexibly build and program the hardware structure, functional characteristics, resource occupation, etc. of the chip according to the needs, so that the target product can be developed at a very low cost in a relatively short period. It belongs to the technical field of instruments and meters. (two) background technology: [0002] In China's electric energy meter market, electronic electric energy meters account for about 30-40%. Among them, the annual demand for single-phase electronic electric energy meters is stable at about 20 million, and the annual demand for three-pha...

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Problems solved by technology

[0007] ●The newly developed three-phase SOC single chip (71M6513) abroad, but the 8051 single-chip microcomputer is integrated in the chip. Since the 8051 single-chip microcomputer is an IP (Intelligent Propriety) hard core, the system structure is not changeable, so the flexibility of this SOC chip is poor and the price is low. high

[0008] ●The country is also developing towards SOC single chip. At present, only Zhuhai Actions has developed a single-phase SOC chip (ATT7023) in 2005, but this chip can only be used for single-phase electric energy measurement. Relatively speaking The performance index is low (accuracy 0.5 level), and it has not been used on the net yet

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