MULTI-PHASE SINUSOIDAL PULSE WIDTH MODULATION INVERTER FOR HIGH EFFICIENCY

摘要

The present invention relates to a multi-phase sinusoidal pulse width modulation (SPWM) inverter for high efficiency capable of securing stable operation and having higher efficiency compared with an existing technology through an inverter which generates a proper switch gate control signal in an operation for converting DC current to AC current by improving an existing SPWM inverter. The present invention includes first to fourth operational amplifiers (OPAmp) which compare a triangle wave and a sine wave having two different reference voltages inputted and determine the duty of PWM, a first to a fourth switch (M1-M4) which are controlled by a pair of on or off repeating process according to a sine-wave-type offset inputted based on the duty determined by the first to the fourth OPAmp, a power source part which applies DC power to the first to the fourth switch, and a detection part which detects AC power outputted from the first to the fourth switch (M1-M4).;COPYRIGHT KIPO 2015