Analysis and Design of a Resonant Power Converter With a Wide Input Voltage Range for AC/DC Applications

Abstract

Resonant converter topologies have the ability to eliminate switching losses through zero-voltage switching, making them well-suited for switching operation in the MHz frequency range. However, these types of converters are traditionally very sensitive to changes in input voltage and power level, making them unsuitable as power factor correcting AC-DC converters. This paper present a throughout analysis of the operation of a class DE converter in order to derive a set of conditions, under which it can achieve constant input impedance over a wide input voltage range (60-325 V DC) with constant output voltage (450 V DC) and thus be operated as a PFC converter, while maintaining zero voltage switching across the full range. The operation is experimentally verified under DC-DC operation for different power levels at a series of input voltages within the specified range. The implemented prototype achieves conversion efficiencies of up to 94 % and handles up to 105 W of power at switching frequencies of 2 MHz and above, while achieving constant input impedance over the full input voltage range, enabling its use as a power factor correcting converter.

A 1-MHz Resonant LED Driver With Charge-Pump-Based Power Factor Correction

“…By substitution of ( 21) in (20), rearranging for C DC , and considering a conservative substitution of the average voltage for the rms, the sizing of the energy-storage capacitor for a given average bus voltage is found from Regarding the double-the-line-frequency ripple, in the conventional two-stage converter structure shown in Fig. 1, where each stage has a separate switch network and control loop, the dc-dc stage controller can be used towards the rejection of the 100/120 Hz ripple on the output current, resulting in low-flicker [40] [41].…”

“…One of such applications is the LED driver, where there is a high demand for small-size and compact solution for several applications, such as in-track LED drivers [25]. Prior art introduced different resonant LED driver structures, including resonant-SEPIC [26], class-E [21], class-E-LLC [27], class-DE [18]- [20], and LLC [28] topologies. In addition, combined PWM-resonant solutions were reported, such as the flyback-class-E [29], boost-LLC [30]- [32], and buck-boost-resonant [33][34] converters.…”

A BL-CC Converter-Based BLDC Motor Drive for Marine Electric Vehicle Applications

“…However, PQimproved canonical cell (CC) converter-based BLDC driver system is reported by Bist and Singh [19]. For EMI problem, various resonant converters have been reported in literature [20,21,24,25]. e soft switching technique to increase the performance from reliability, reduction in switching losses, and EMI interference point of view, is presented by Pahlevani and Jain [26].…”

Identification of ZVS Points and Bounded Low-Loss Operating Regions in a Class-D Resonant Converter

“…A popular family of resonant converter is the class-D series resonant converter [9][10][11][12] and its derivatives like the LLC This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 731466.…”

“…The analysis only considers the use of fixed duty cycle for the dead time generation, leaving out the fixed dead time option. This is also the case for [10,11,13,18,19,33]. This paper presents an analysis of the different switching loss modes in the GaNFETs for a class-D Series Resonant Converter (SRC) when the duty cycle/dead time is assumed fixed and FM-control is utilized.…”