Patent ID: 7660135
Filing Date: 2010-02-09
Classification: H02M

Abstract:
1. A alternating current (AC) generator system comprising: a direct-current (DC) to DC converter that includes a first switch, a second switch, a transformer, and a full wave rectifier to convert a DC input voltage to a DC output voltage; a DC to DC controller that provides a first pulse width modulation (PWM) signal to the first switch and a second PWM signal to the second switch in response to a monitored output voltage to regulate the DC output voltage to a desired magnitude, wherein the DC to DC controller includes a DC offset control loop that monitors current on a primary side of the transformer, isolates DC content within the monitored current, and generates a DC content compensation signal in response to the isolated DC content that is combined with the monitored output voltage to modify the first PWM signal provided to the first switch such that DC content is minimized within the transformer; an inverter that includes a network of switches, at least one output inductor, and at least one output capacitor for converting the DC output voltage provided by DC to DC converter to an AC output voltage of desired magnitude and frequency; and an inverter controller that provides control signals to the network of switches based on monitored AC output voltage of the inverter and a reference voltage defining the desired magnitude and frequency, wherein the inverter controller employs a plurality of control loops to generate the control signals provided to the network of switches to provide regulation of the AC output voltage.