Construction Of 3phase Sine Waves Using Digital Technique

All the real world parameters such as temperature, pressure etc., are analog in nature, In order to control these physical parameters using computers, which are digital in nature, high speed signal processing board is used. This mainly consists of devices such as analog to digital converter, digital to analog converters and timer which perform the interfacing function between analog and digital are known as data converters. By using Digital methods accuracy and precision of the equipment will be very high compared to analog method of sine wave generation. It provides highly stable and accurate Voltages, Currents and frequency of the 3 phase signals because it is having feedback mechanism. This work consists of DAC 8822[7], 8254 [6] Programmable Timer. This timer is programmed to generate an interrupt of 56μs time period which is fed to IRQ10 pin of PC 104 bus based single board computer [3]. A Device driver is written in Linux which is inserted into the Kernel. Then the processor communicates with 16bit high speed DAC[7] which outputs the sine samples of 50Hz frequency. Keywords-Ssingle Board Computer (SBC); Data Signal Processing Board(SPB); ,Human Machine Interface (HMI).