外文翻译 Rectification Circuit single-phase, three-phase leveling circuit principle of work and profile analysis method leveling circuit active inversion active status 1st, outline: Appears the earliest electric power electronic circuit, es the alternating current the direct current. 2nd, leveling circuit classification: May divide into not controllably according to ponent, partly controls, all controls three kinds. May divide into the bridge circuit and the zero type electric circuit according to the electric circuit structure. Counts according to the exchange input divides into the single-phase circuit and the polyphone circuit. Is unidirectional according to the transformer two sides electric currents direction or bidirectional, also divides into only pats the electric circuit and the pair of racket electric circuit. Single-phase controllable leveling circuit Single-phase half-wave controllable leveling circuit 1st, belt resistive load working condition Transformer T plays the transformation voltage and the electrical isolation role。 1) characteristic: (1) the voltage and the electric current have the direct ratio, two profiles are same. (2) phase shifting scope: 。 (3) along with increasing, Due reduces. (4) the crystal hydration withstands most Taisho, the reverse voltage are First, introduces two important basic concepts: Triggers : Starts from the crystal hydration to withstand to is exerting the trigger pulse to the anode voltage to stop , indicated with a, also the name triggers the angle or the control angle. Leads passes the angle: The crystal hydration is in passing condition in a power source cycle , with theta expressed. 2) bulk relations The direct-current output voltage mean value is Controls the direct-current output voltage size through the control trigger pulse phase the way to be called the phase control way, the abbreviation controls the way. 2nd, belt anti- feeling load working condition 1) anti- feeling load character
