Three-phase to single-phase AC power converter

Abstract

The invention provides a three-phase into single-phase alternating current power supply converter, comprising a shell body, a primary iron core, a three-phase alternating-current input circuit, a secondary iron core, a single-phase AC output circuit and a middle shaft, wherein the primary iron core forms a plurality of primary winding grooves; the three-phase alternating-current input circuit winds and forms a primary winding separately in each of the primary winding grooves; the secondary iron core forms a plurality of secondary winding grooves; the single-phase alternating output circuit winds to form a secondary winding in each of the secondary winding grooves separately; the secondary iron core is fixed to the periphery of the middle shaft in a sleeving manner; the primary iron core and the middle shaft are fixed in the shell body; the primary iron core is arranged outside the secondary iron core with gaps in a sleeving manner; and the primary iron core coincides with the center ofthe secondary Iron core. The invention relates to the three-phase into single-phase alternating current power supply converter, which satisfies the actual needs of the residents, and has the advantages of improving the conversion efficiency, reducing the high harmonics and improving the security of the power supply.

Description

technical field [0001] The invention relates to the field of AC power converters, in particular to a three-phase to single-phase AC power converter. Background technique [0002] At present, the three-phase AC power generation and power supply system has the advantages of balanced power supply, high efficiency, material saving, and low cost. Power systems in countries around the world generally use three-phase AC power, generators generally use three-phase AC motors, and industrial power consumption mostly uses three-phase AC motors. phase electrical appliances. However, civilian electrical appliances such as lighting, small electric tools, and household electrical appliances require single-phase AC power supply. The usual practice is to use one phase wire in the three-phase AC power supply and the neutral wire in the three-phase four-wire system to supply power to residents. [0003] There are three common technical methods for converting three-phase alternating current in...

AI Technical Summary

Problems solved by technology

[0004] However, the existing methods have the following problems: using one phase line in the three-phase alternating current and the neutral line in the three-phase four-wire system to supply power to residents, which will easily cause unbalanced three-phase power supply, increased loss, and electric leakage Accidents; the method of using power electronic devices to convert three-phase alternating current into single-phase alternating current is due to the introduction of high-frequency harmonics by switching devices during inversion, which increases losses; using three-phase motors to drive single-phase generators has high costs and loss Big problem; when the load changes with the LC phase shifting device, there will be circulating current in the LC phase shifting device, which will cause serious heat generation and decrease the system efficiency

Images