Patent ID: 7796411
Filing Date: 2010-09-14
Classification: H02J,H02M,Y02B,Y02E,Y02P,Y10S

Abstract:
1. A three-phase universal controller, comprising; a reference signal source unit integrated with a one-cycle control (OCC) controller and configured to inject reference signal into the OCC controller, the OCC controller comprising; a control core configured to generate a plurality of pulse width modulated (PWM) duty-ratio drive signals; a voltage loop compensator coupled with the control core and configured to take a taking reference voltage Vref and DC voltage feedback signal proportional to an output DC voltage Vo of a three-phase power converter and provide an output Vm coupled to the control core; a region selection unit configured to detect a first, second and third time-varying line voltage signals, each line voltage signal having a different phase, and configured to determine a region of operation based on zero crossings of all three time-varying voltage signals; a signal selection unit coupled with the region selection unit and the control core and configured to select two or more line current signals flowing through the first, second and third time varying line voltage sources and the reference signal and based on the region of operation and provide the selected signals to the control core; and a drive signal distribution unit coupled to the control core and the region selection unit, the drive signal distribution unit configured to distribute the PWM duty ratio drive signals from the control core to switches of a three-phase converter to realize non grid-tied inverters, static voltage-ampere-reactive (VAR) compensators (SVC), or power converters with the capability of any combination of a power factor corrected rectifier, a grid-tied inverter, a non-grid-tied inverter, a SVC, and an active power filter.