| 摘要 |
<p>A power supply having a high power factor and low harmonic distortion which is stable in either an electrically isolated system or an electrically non-isolated system is provided. In the power supply for the electrically isolated system, a controller (207) is coupled to an AC voltage source and a primary winding (205). The primary winding (205) is inductively coupled to a secondary (270) and an auxiliary winding (212). The secondary winding (270) provides the output DC voltage. The secondary winding (270) and auxiliary winding (212) are formed in a tight magnetic coupling. The auxiliary winding (212) provides a voltage supply for the controller (207) and also provides an accurate representation of the output voltage to the controller (207) in a voltage feedback path. The separate voltage feedback path to the controller isolates the distortion which is inherent in the voltage supplied to the controller (207).</p> |
