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The interleaved structure of LLC resonant converter with the phase-shift modulation (PSM) is presented and then its optimum operating region is discussed. The LLC resonant converters can achieve zero-voltage switching (ZVS) of the primary switches and zero-current switching (ZCS) of the secondary switches. However, the secondary peak current is large due to the discontinuous conduction mode (DCM)...
In this paper, the effect of phase shift modulation on the LLC resonant converter for an interleaved LLC resonant converter with phase shift modulation is investigated. The LLC resonant converters can achieve zero voltage switching (ZVS) of the primary switches and the zero current switching of secondary switches. Due to the sinusoidal shapes and discontinuous conduction of secondary current, the...
In this paper, a new quick response digital modified P-I-D control with flexible duty ratio for LLC resonant dc-dc converter in −48V DC power supply system and the transient response against input voltage step changes are discussed. It is revealed that the transient response of the input voltage is largely improved compared with the conventional method.
This paper proposes a new fast response frequency digital control with multi-sampling point for LLC resonant dc-dc converter. In the power supply system, the digitally controlled LLC resonant converter will be widely used, because it is a high power efficiency characteristic. However it is necessary to improve the digital control method because the delay time based on calculation occurs. In the conventional...
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