Single-phase bridge type rectifying filter circuit

Abstract

The present invention discloses a single-phase bridge type rectifying filter circuit which comprises a transformer T, a rectifying circuit and a load RL that are successively connected. Two ends of the transformer T are respectively connected with a signal input end Vin and a signal output end Vo. The rectifying circuit is a single-phase bridge type rectifier. The single-phase bridge type rectifier comprises four diodes, namely a D1, a D2, a D3 and a D4. The input end of the diode D1 is connected with the input end of the diode D2. The output end of the diode D1 is connected with the input end of the diode D3. The output end of the diode D2 is connected with the input end of the diode D4. The output end of the diode D3 is connected with the output end of the diode D4. A capacitor C is parallelly connected with two ends of the load RL. The single-phase bridge type rectifying filter circuit with the structure can acquire stable rectifying and filtering effect, thereby improving efficiency of the transformer. Simultaneously, on condition of same power capacity, the size of the transformer can be designed to be smaller.

Description

technical field [0001] The invention relates to a filter circuit, in particular to a single-phase bridge rectification filter circuit. Background technique [0002] Rectification is to convert alternating current into direct current. The completion of this task mainly depends on the unidirectional conduction of diodes, so diodes are the key components of rectification circuits; and filtering is to eliminate interference noise and filter the input or output to obtain Pure direct current. A circuit that effectively filters out a frequency point of a specific frequency or frequencies other than this frequency point is a filter, and its function is to obtain a specific frequency or eliminate a specific frequency. At present, the more common rectification circuits are single-phase half-wave rectification or full-wave rectification. However, they all have a disadvantage, that is, there is a DC component flowing in the filter circuit, which leads to low efficiency of the transform...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a single-phase bridge rectifier filter circuit, which solves the problems of low transformer efficiency, unsatisfactory filter effect and low overall performance in the previous rectifier filter circuit

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