Patent ID: 6040989
Filing Date: 2000-03-21
Classification: H02M

Abstract:
A method for providing a pulse-width modulated three-phase sine wave output from a three-phase inverter, each sine wave defining a 360.degree. electrical cycle, each cycle including three 120.degree. segments that each define phase angles of 0-120.degree., the method comprising:during the first 120.degree. segment, outputting PWM signals from a first PWM generator to a first leg of the inverter, and outputting PWM signals from a second PWM generator to a third leg of the inverter;during the second 120.degree. segment, outputting PWM signals from the first PWM generator to the first leg of the inverter, and outputting PWM signals from the second PWM generator to a second leg of the inverter; andduring the third 120.degree. segment, outputting PWM signals from the first PWM generator to the third leg of the inverter, and outputting PWM signals from the second PWM generator to the second leg of the inverter.