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Design and Development of PIC Microcontroller Based 3 Phase Energy Meter

Thousif ahamed, A.Sreedevi

the purpose of this project is to develop a 3-phase Energy Meter, using dsPIC33F microcontroller and MCp3909 ADC IC from microchip, used to perform all the measurements in the energy meter. Basically, the energy meter is designed to measure the energy, equivalent to the power consumption over time, using the formula of P = V * I. Therefore, two input channels are connected to the ADC chip, one for voltage, and another for current. Analog signals will be detected from the two input channels, which will be converted into Digital signals by ADCs respectively. With the two digital input signals transmitted to the microcontroller via SPI protocol, dsPIC33F calculates the power hence, energy consumed will be accumulated after a specified period of time. The microcontroller is programmed with C language; ADC channels are used for converting both current analog signal and voltage analog signal; multiply algorithm is used to process the power and energy, voltage and current signals based on the energy formula and many parameters are displayed such as voltage, current, Active power, reactive power, apparent power, frequency etc. A suitable multiple output power supply circuit is designed to provide supply to the MCU, with a input range of 85 to 265v a constant output of 3.3v and 5v is obtained

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