Multi-phase power converter with harmonic neutralization
AssigneeDelco Electronics Corporation
InventorAlfred Henry Barrett
Life of this patent
Estimating the term…
Abstract
A multi-phase AC to DC harmonic neutralizing power converter. The power converter includes a plurality of non-isolated inputs for respective phases of a multi-phase source of AC power and a plurality of first rectifiers connected respectively to the inputs. A multi-phase harmonic neutralizing converter includes a power switching inverter having an input connected to the outputs of each of the first rectifiers, the inverter including LC resonant circuits. A plurality of second rectifiers having respective inputs connected to the output of the inverter through a plurality of respective transformers having outputs that are connected in voltage additive relationship to the outputs of the respective individual phase first rectifiers.
Claims19
An n-phase AC to DC power converter comprising:
- an n-phase source of AC power,
- (n) non-isolated inputs for respective phases of said n-phase source of AC power,
- (n) first rectifiers connected respectively to said (n) non-isolated inputs, each such first rectifier having an output,
- load output terminals for delivering DC power to a load,
- (n) power switching LC resonant inverters having inputs connected to respective outputs of
- said first rectifiers, each such inverter having an output, and
- (n) second rectifiers having inputs connected to respective outputs of said inverters through (n) respective transformers, said second rectifiers having outputs connected in a voltage additive relationship to the respective outputs of said first rectifiers, the added outputs of respective first and second rectifiers being connected to said load output terminals through isolation circuits for connecting each phase of said n-phase source to said load, while providing mutual isolation between said phases.
An n-phase AC to DC power converter comprising:
- a plurality of non-isolated n inputs for respective n phases of a n-phase source of AC power,
- a plurality of first rectifiers connected respectively to said inputs, each said rectifier having an output,
- load output terminals for delivering DC power to a load,
- a multi-phase, harmonic neutralizing converter comprising power switching inverters using full bridge switching and having inputs connected to the respective outputs of each of said first rectifiers, and
- a plurality of autotransformers,
- said neutralizing converter comprising a plurality of sets of LC resonant circuits associated respectively with said first rectifiers, each of said sets of LC resonant circuits comprising a plurality of LC resonant circuits connected respectively to separate inputs of the respective said autotransformer and further comprising a second rectifier having an input connected to an output of said converter through the respective autotransformer and having an output connected in a voltage additive relationship to the output of the respective first rectifier, the added outputs of respective said first and second rectifiers connected to said load terminals.
Dependencies are inferred from the claim text.