AC/DC converter and method of modulation thereof
AssigneeGeneral Electric Company
InventorsSilvio Colombi, Claudio Balbiano, Lauro Strozzi
Life of this patent
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Abstract
An apparatus having a rectifier topology for use on a three-phase electrical system is disclosed. The apparatus includes an input filter at each phase, a rectifier set at each phase in power communication with and downstream of each respective input filter, and a separate and independent booster section at each phase in power communication with and downstream of each respective rectifier set. Each booster section comprises two switches, thereby providing a six-switch three-level discontinuous conduction mode (DCM) boost rectifier.
Claims23
An apparatus having a rectifier topology for use on a three-phase electrical system, the apparatus comprising:
- an input filter at each phase;
- a rectifier set at each phase in power communication with and downstream of each respective input filter;
- and
- a separate and independent booster section at each phase in power communication with and downstream of each respective rectifier set;
- wherein each booster section comprises two switches, thereby providing a six-switch three-level discontinuous conduction mode (DCM) boost rectifier;
- wherein each booster section is controlled via a modulated control signal separately and independently from another booster section, and each switch of each booster section is responsive to a separate modulation signal from a separate voltage controller.
An apparatus for rectifying arid boosting three-phase electrical power, the apparatus comprising:
- an input circuit and an output circuit, the input circuit comprising an input filter for each phase;
- the input circuit configured for receiving three-phase ac voltage, and for delivering three-phase rectified voltage;
- the output circuit configured for receiving the three-phase rectified voltage, individually boosting the voltage of each rectified phase, and delivering boosted dc voltage to a first and second output terminal.
A method for providing three level dc voltage, comprising:
- filtering three-phase ac voltage and rectifying the filtered voltage of each phase;
- receiving the filtered and rectified three-phase ac voltage;
- and
- boosting individually the rectified voltage of each phase via a pair of individually controlled electronic switches per phase, each pair having a neutral connection, each neutral connection of each pair of switches being electrically connected with each other thereby defining a booster neutral, and combining the boosted voltage to provide three level dc voltage output via two output terminals, each output terminal having an electrical potential relative to the booster neutral.
Dependencies are inferred from the claim text.