Inverter circuit having a controller to supply a reactive current on a phase with a voltage drop
AssigneeFecon, LLC
InventorStephan Rexilius
Life of this patent
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Abstract
A three-phase inverter circuit includes an inverter incorporating a plurality of controllable power switches, and an electronic control device adapted to control the power switches. The control device in the event of a measured voltage drop on one phase is adapted to supply a reactive current on the phase with voltage drop and to supply and/or draw an active current on at least one phase without voltage drop.
Claims22
A three-phase inverter circuit, including an inverter comprising a plurality of controllable power switches, and an electronic control device adapted to control the plurality of controllable power switches, wherein the electronic control device in the event of a measured voltage drop on one phase is adapted to supply a reactive current on the phase with the measured voltage drop, only, and to supply and/or draw an active current on at least one phase without the measured voltage drop.
A frequency converter, comprising:
- a rectifier circuit;
- and
- a three-phase inverter circuit, wherein the three-phase inverter circuit comprises an inverter with a plurality of controllable power switches and an electronic control device adapted to control the plurality of controllable power switches, wherein the electronic control device in the event of a measured voltage drop on one phase is adapted to supply a reactive current on the phase with the measured voltage drop, only, and to supply and/or draw an active current on at least one phase without the measured voltage drop.
A method for operating a three-phase inverter circuit, including pulse-width modulation control of a plurality of controllable power switches, wherein in the event of a measured voltage drop on one phase a reactive current is supplied on the phase with the measured voltage drop and an active current is supplied and/or drawn on at least one phase without the measured voltage drop.
Dependencies are inferred from the claim text.