Preemptive protection for a power convertor
AssigneeAdvanced Energy Industries, Inc.
InventorsHendrik Walde, Daryl Frost
Life of this patent
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Abstract
Among many embodiments, a power conversion apparatus and a method for converting power are disclosed. The power conversion apparatus may include switching components configured to create an alternating current; a preemptive detector arranged and configured to provide, in advance of the alternating current reaching a zero-crossing, a control signal responsive to the alternating electrical current approaching the zero-crossing; and a controller configured, at least in part, to change a state of the switching components before the zero crossing, in response to the control signal.
Claims11
A power conversion apparatus, comprising:
- switching components configured to create an alternating current;
- a preemptive detector arranged and configured to provide, in advance of the alternating current reaching a zero-crossing, a control signal responsive to the alternating electrical current approaching the zero-crossing;
- and
- a controller configured, at least in part, to change a state of the switching components before the zero crossing, in response to the control signal.
A method for converting power, comprising:
- creating an alternating current with at least two switches;
- producing a current signal that is indicative of the alternating current;
- shifting a phase of the current signal so as to generate a phase-shifted-current-signal that has zero-crossings that occur before zero-crossings of the current signal;
- and
- altering, responsive to the phase-shifted-current-signal approaching a zero-crossing, a state of the switches before the alternating current reaches a zero-crossing.
Dependencies are inferred from the claim text.