Abstract
Power quality is a critical issue in power systems. This paper proposes a bridgeless boost converter to increase the power factor of power systems using a utility line source for raising power quality. To reduce input and output current ripple, an interleaving manner is adopted in the proposed power system. When the interleaving bridgeless boost converter is used to implement power factor correction (PFC), it needs two bridgeless boost converters to process power during one switching cycle. In order to simplify the proposed bridgeless boost converter, two sets of switches in the conventional bridgeless boost one are integrated to reduce component counts. With this approach, the proposed bridgeless boost converter uses four switches to implement PFC features. Therefore, the proposed boost converter can increase conversion efficiency and decrease component counts, resulting in a higher conversion efficiency, lower cost and more simplicity for driving circuits. Finally, a prototype with a universal input voltage source (AC 90 V~265 V) under an output voltage of 400 V and a maximum output power of 1 kW has been implemented to verify the feasibility of the proposed bridgeless boost converter.
Highlights
When a power supply generates a high-frequency noise, it will cause an abnormal signal of the sensor, leading to an error for Internet of Things (IoT) operations
A switching-mode converter is widely applied to these applications [1–11]
The proposed interleaving boost converter can reduce the ripple currents of inductors
Summary
When a power supply generates a high-frequency noise, it will cause an abnormal signal of the sensor, leading to an error for IoT operations. It needs a precision power supply and good power quality to supply a precision voltage level to control the system and avoid noise that affects its control functions. When a switching-mode converter adopts a utility line source as its power source, it will generate a seriously harmonic current pollution in the line source. In order to protect the line source from harmonic current pollution, a power factor corrector (PFC) is used in AC/DC power systems It has to meet the various international power quality standards, such as International Electro-technical
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