A novel ac/dc/ac converter topology with three-level pulsewidth modulated (PWM) scheme for the single-phase ac/dc rectifier and random PWM scheme for ac drives is proposed. In order to improve the power quality in the single-phase rectifier, a ROM-based (read-only memory) control scheme, based on hysteresis current comparator, region detector, and capacitor compensator, is used to achieve a sinusoidal line current with low current distortion. The control scheme of the adopted three-level rectifier is easy to implement. The blocking voltage of power switches is clamped to half of the dc bus voltage. To reduce the mechanical vibration from an induction motor, random pulse position PWM scheme is adopted to spread the harmonics in a wide frequency range which results in the reduction of torque pulsation in the ac motor drives. Simulation and experimental results based on the laboratory prototype circuit are presented to verify the proposed control scheme.
Single-phase three-level rectifier and random PWM inverter drives
IEEE Transactions on Aerospace and Electronic Systems ; 35 , 4 ; 1334-1343
1999-10-01
685875 byte
Article (Journal)
Electronic Resource
English
PAPERS - Single-Phase Three-Level Rectifier and Random PWM Inverter Drives
Online Contents | 1999
|Single-Phase Grid-Connected PV System using Three-Arm Rectifier-Inverter
Online Contents | 2006
|PAPERS - Analysis and Implementation of a Three-Level PWM Rectifier-Inverter
Online Contents | 2000
|