Generation of PWM Inverter Based on a Microcontroller at Feeding Induction Motor
Mohammed Hussein Baqir
Mohammed Hussein, Baghdad holds a Baklores engineering Electronic and Communications in 1976 and master’s degrees in engineering electronic Technology Universitym.
Manuscript received on March 01, 2014. | Revised Manuscript received on March 04, 2014. | Manuscript published on March 05, 2014. | PP: 9-14 | Volume-4 Issue-1, March 2014. | Retrieval Number: A2062034114/2014©BEIESP
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Abstract: The steps of process of generated PWM are implemented by using a microcontroller 89c51 and using personal computer (PC). In this project the unipolar modulation technique is presented to overcome many problems. The generated pulses are fed to six pulses at bridge inverter consist of six (MOSFET) transistors. The fundamental operation of PWM is depending upon mathematical relationships between the voltage and the frequency (V/ F) constant value, this relationship gives low harmonics that takes place the modulation process. The control signal of PWM inverters is generated by comparing a reference sinusoidal waveform and triangular waveform of modulating signal. The dc link is constant value, and modulation index is variable according to the varying output voltage of the inverter.
Keywords: PC, MOSFET, V/F.PWM.