| 摘要 |
PURPOSE:To minimize the power which is consumed in one semiconductor and to improve the power efficiency by dividing one cycle into a plurality of unit times and by conducting a plurality of semiconductors for the unit time. CONSTITUTION:A DC-AC inverter is composed of semiconductors Q1-Q3, and Q5-Q7 which operate as a plurality of electronic switches, a transformer T having the primary winding wherein a terminal 4b is a center tap and the corresponding secondary winding 10, an R-L shift register 13 which sequentially drives said electronic switches, an R-L controller 12, and a clock oscillator 14. Each tap of the primary winding of the transformer T is drawn from the winding wherein the tap group on one side is symmetrical to the tap group on the other side with respect to the center tap 4b. The ratio between both windings is determined so that the ratio is inversely proportional to the value which is obtained by sampling the instantaneous values of the sine-wave AC. |
