Switching power source

Abstract

Abstract PURPOSE:To enhance the efficiency by inserting a switching element into a circuit loop from the output winding of an output rectifying and smoothing circuit to a rectifier, and controlling the time ratio of this element, thereby enhancing the output stability. CONSTITUTION:A switching element 1 such as a transistor is connected in series with the input winding N11 of a transformer T1, and the element 1 is controlled to be stabilized by a controller 4 according to the DC output signal from one of output rectifying and smoothing circuits 2 of a plurality of output windings N21, N22. In this case, a switching element 13 is inserted into the circuit loop of output rectifying and smoothing circuits 3, and the time ratio (the ratio of the conducting time width to the interrupting time width) is controlled by a controller 14 according to the DC output signal. Thus, output stabilizing function is provided even in the circuit 3 which does not have a control system for the element 1 to stabilize the DC output V02.

Inventors

• 👤 Masaru Wazaki
• 👤 賢 和崎
• 👤 Katsuhiko Shimizu
• 👤 克彦 清水

Bibliographic Details