| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a resonant switching power supply that reduces noise while achieving simplification of a circuit configuration for noise reduction. Ž<P>SOLUTION: The resonant switching power supply is composed of a capacitor and a primary winding of a transformer, which are connected to switching elements controlled by an oscillator, a secondary winding of the transformer, and a rectifier smoothing circuit. The switching elements are driven by a sine wave while a conduction angle of the sine wave is controlled. Switching elements Q1-Q4 are driven by a sine wave by a sine-wave oscillator 13 and a phase controller 15 while a conduction angle of the sine wave is controlled by a feedback signal from output on the secondary side so as to adjust input power to a prescribed value, thereby maintaining output on the secondary side at a constant level. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
