| 摘要 |
<p>The invention describes a circuit arrangement of a resonant switching converter for providing an output DC voltage to a load (R1) from a supply DC voltage source. The arrangement comprises an inverting bridge adapted to selectively connect the voltage source to at least one load (R1; R o ) through a switching network (M1-M4; T1, T2) electronically driven in order to achieve a desired output voltage; and a resonant circuit (L1, C5; L s , C p ) coupled with the inverter bridge and operatively arranged across the supply source, adapted to establish a controlled voltage across the load (R1; R o ), including a first resonant electric element with an essentially inductive impedance (L1; L s ) in series with a second resonant electric element with an essentially capacitive impedance (C5; C p ), which are adapted to establish a fundamental resonance frequency of the circuit. The resonant circuit includes a further resonant electric element with an essentially inductive impedance (L2; L p ), arranged substantially in parallel with the electric element with essentially capacitive impedance (C5; C p ), and adapted to determine additional resonance frequencies of the circuit lower than the fundamental resonance frequency. The resonant electrical elements (L1, C5, L2; L s , C p , L p ) have respective inductance and capacitance values such as to determine a quality factor Q of the resonant circuit lower than unity, and preferably equal to 0.5.</p> |
