THREE LEVEL SPACE VECTOR PULSE WIDTH MODULATION OVER MODULATION CONTROL DEVICE AND METHOD CAPABLE OF EASILU CONTROLLING COMMANDED VOLTAGE

摘要

PURPOSE: A three level space vector PWM(Pulse Width Modulation) over modulation control device and method are provided to easily create a commanded voltage value in a static over modulation technique by easily producing static over modulation using a same phase over modulation technique.;CONSTITUTION: A modulation index is calculated using the size of a fundamental wave component of phase voltage and the size of a fundamental wave component of instruction value voltage. A first over modulation mode and a second over modulation mode are classified according to the modulation index. A first instruction value voltage vector is created by increasing the instruction value voltage to first increasing instruction value voltage in the first over modulation mode. The instruction value voltage is increased to second instruction value voltage in the second over modulation mode.;COPYRIGHT KIPO 2013