Single-core differential current transformer power supply

Abstract

The invention discloses a single-core differential current transformer power supply. The main body of the power supply is two groups of coils wound on an annular energy acquiring iron core; two groups of coils are in differential connection; two AC input ends of a bridge rectifier circuit are respectively connected with two output ends of the differential coils and output ends are connected to a filter circuit; a positive output end of the filter circuit is connected to a positive input end of a voltage regulator circuit; a positive output end of the voltage regulator circuit is connected to a electrolytic capacitor; positive and negative poles of the electrolytic capacitor are respectively used as positive and negative output ends of the power supply. Compared with traditional current transformer power supply with single coil, the differential current and voltage output by the differential coil is smaller at the same primary current excitation, so that the differential current transformer power supply can work at tremendous primary current and the power supply uses one annular energy acquiring iron core, the volume is smaller than that of the double-core differential current transformer power supply; the use is convenient; the differential current transformer power supply is mainly used for supplying electrical energy for high voltage side of electronic transformer.

Description

technical field [0001] The invention belongs to the technical field of electric power supply, and in particular relates to a differential current transformer power supply, which can provide electric energy for the high-voltage side of an electronic transformer. Background technique [0002] Iron-core current transformers are widely used in power systems. The core current transformer has two functions of current conversion and power supply at the same time, and has the ability of self-supply. [0003] Electronic transformers, including hollow coil or Rogowski coil and various fiber optic transformers, have developed rapidly in recent years. The electronic transformer has two parts, the high-voltage side and the low-voltage side, and the high-voltage and low-voltage sides are connected by optical fibers to achieve the purpose of isolating the high-voltage line. Different from the traditional core current transformer, the high-voltage side of the electronic transformer has no...

AI Technical Summary

Problems solved by technology

Later people proposed a dual-core differential scheme, but the power supply in this scheme has two sets of energy-taking core coils, the volume is too large, the actual use is very inconvenient, and the application range is limited (see literature [2] Xu Ken, et al. dynamic current transformer power supply.)

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