An Interleaved Totem-Pole Bridgeless Boost PFC Converter with Soft-Switching Capability Adopting Phase-Shifting Control

PFC Single-Phase AC/DC Boost Converters: Bridge, Semi-Bridgeless, and Bridgeless Topologies

“…This converter is used in low voltage and power applications, and its efficiency is lower than the one of the totem-pole and GaN totem-pole (between 94% and 97%) topologies due to the additional components in the converter. In the same way, the GaN totem-pole can be modified by adding diodes D 1 and D 2 and inductors L 2 and L 3 according to Figure 16b [8,23,134]. Diodes and inductors comply with the same function as the converter in Figure 16a (reducing reverse recovery issues and contribute with ZCS); additionally, efficiency is also reduced requiring a robust control strategy and filtering to comply with THD i limits given by the normative.…”

“…CBP converters implement the Power Factor Correction (PFC) technique that consists of controlling the AC current demanded from the network in such a way that AC current is sinusoidal and in phase with the voltage of the supply network and, at the same time, they perform DC voltage regulation in their output. Basically, CBP converters behave as a resistive load for the electrical network, improving the power quality and overall efficiency and also by helping comply with the harmonic regulation IEC 1000-3-2 [7][8][9][10][11]. Another important aspect is that CBP converters may also avoid the use of active power filters between the power network and loads, which yields a more economic and suitable solution in these kinds of applications [12,13].…”

“…However, this topology exhibits the following comparative disadvantages when used in medium-high power applications: (1) BBC has at least three semiconductor devices in the path of currents from source to load which increases conduction losses; (2) BBC requires a switching frequency greater than 30 kHz to lower the THD i below the IEC 1000-3-2 standard; (3) the inductor is located on the DC side requiring design considerations to avoid saturation of its core. BBC topology, in its conventional form, is only recommended for applications up to 1 kW [8,22,23]. The power consumed by the line bridge rectifier takes up to 30∼60% of the total losses in a large range in a BBC rectifier [23].…”

Bridgeless Boost Converter with an Interleaving Manner for PFC Applications

“…In order to reduce the passive component size, increase the output power level and decrease the current ripple, an interleaving circuit is usually adopted as an alternative solution in high-power applications. Many interleaving converters have been proposed, such as in [13][14][15][16][17][18][19]. When the AC/DC converter uses the conventional bridgeless boost converter for PFC applications, it can adopt its interleaving circuit to increase power processing capability, as shown in Figure 5.…”

A Power factor corrector using interleaved boost fuzzy-logic converter: design, analysis, and implementation

“…Power factor improvement is required in this case to meet harmonic standards, longer device lifetime, and proper operation of other devices in the system. Other advantages of PFC include increased electrical system capacity [4], diminished power losses and switching losses in the distribution system [5], increased system efficiency [6], decreased voltage drops that cause overheating [7], and premature failure in the case of motor loads and other inductive equipment [8]. Active-type power factor correction circuits typically use a power supply counting to reduce the harmonics of the alternating input current (AC) and regulate the unidirectional (DC) output voltage.…”