BRIDGELESS INTERLEAVED POWER FACTOR CORRETION AND METHOD FOR CONTROLING

Bridgeless interleave power factor correction circuit to reduce power loss

This technology relates to a bridgeless interleave power factor correction circuit and driving method, and more particularly, to a bridgeless interleave power factor correction circuit and driving method for battery charging devices for electric vehicles.

Converters with conventional bridgeless interleaved power factor correction circuits have the problem that high efficiency can only be achieved due to high EMI noise, low utilization of circuit components, and complex feedback circuits. Thus, this technology proposes a method that can have a high device utilization rate while being implemented with few active elements by merging at least two merged boost legs into a single high-speed diode.

Accordingly, this technology can be expected to have a power loss effect compared to conventional bridgeless interleaved power factor correction, and has advantageous advantages in terms of applicability and operational efficiency.

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Key features:

• At least one single boost leg connected to input power and containing an inductor
• Includes a merged boost leg that connects to an input power source and includes an inductor and a low speed diode
• Multiple switch circuits including a single switch circuit connected to a single boost leg and a merged switch circuit connected to two merged boost legs
• Measure the output current of at least one of the single switch circuits and the combined switch circuit according to a predetermined operating interval and a predetermined current measurement time

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