3. Sequential extraction control device for three-phase quality control / quality control converter. The three-phase converter consists of three single-phase CC / Ca converters, each controlled by its own PWM extractor. The adjustment of the service factor depends on an existing part of the CA power cycle. A sequence regulator makes the service cycle of the PWM extractor not overlap. Therefore, each converter extracted from a single CC / Ca converter is sequential rather than simultaneous. This improves the efficiency of continuous current power extraction.
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