CAJ | 학술논문

本文提出一种电能检测仪表的设计，采用以超低功耗、生存环境强适应性和丰富的片上外围模块为优点的 MSP430F149单片机为主控制芯片。在电网环境中，电压电流之间由于感性负载而存在相位差，对相位差取余弦就是功率因素。本文采用运放和电阻的结合对电压和电流进行采样，同时利用硬件过零点电压比较得到电压和电流的相位差。本仪表能够在电网存在故障时，依然准确无误的进行数据测试和信号采集。
본문제출일충전능검측의표적설계，채용이초저공모、생존배경강괄응성화봉부적편상외위모괴위우점적 MSP430F149단편궤위주공제심편。재전망배경중，전압전류지간유우감성부재이존재상위차，대상위차취여현취시공솔인소。본문채용운방화전조적결합대전압화전류진행채양，동시이용경건과영점전압비교득도전압화전류적상위차。본의표능구재전망존재고장시，의연준학무오적진행수거측시화신호채집。
This article presents a design of Electrical Energy Measuring Instrument and uses MSP430F149 microcontroller as main control chip, which has some advantages of ultra-low power consumption, strong environment adaptability and rich on-chip peripheral modules. In the grid environment, there is a phase difference between the voltage and current because of inductive load. Power-factor is to take cosine phase difference. This article adopts the combination of the op amp and resistor to sample the voltage and current. Also, it utilizes hardware zero voltage comparison to abstain the phase difference between the voltage and current. When the grid exist fault, this indicator can still accurately test data and sample signal.