Three-phase rectification circuit and air conditioner with same

Abstract

The invention discloses a three-phase rectification circuit, which comprises: a rectifier, which rectifies the three-phase alternating current to output a direct current of a first voltage and a direct current of a second voltage; a first filter, which is connected to the rectifier, The first filter performs filter processing on the direct current of the first voltage; the DC-DC conversion module, the DC-DC conversion module includes a transformer and a switching device, the primary winding of the transformer is connected to the switching device, and the secondary winding of the transformer is used as a DC-DC conversion At the DC output terminal of the module, the DC-DC conversion module converts the filtered DC power of the first voltage into a DC power of the third voltage, and outputs the DC power through the DC output terminal. The three-phase rectification circuit of the present invention is ingeniously designed, and can realize multiple power supply functions in one body, which can not only save the work of hardware design, save the space of layout design, but also reduce the hardware design cost of the circuit. The invention also discloses an air conditioner.

Description

technical field [0001] The invention relates to the technical field of frequency conversion, in particular to a three-phase rectification circuit and an air conditioner provided with the three-phase rectification circuit. Background technique [0002] In recent years, with the rapid development of frequency conversion technology, the application of frequency conversion technology has become more and more extensive. However, in the frequency conversion control technology, the driving power required by various control units is a difficult problem to be solved. Since many power sources are required and the voltage range is wide, for example, DC voltage ranging from DC1.8V to DC24V is required, so it becomes an urgent problem to solve the wide voltage DC-DC converter. [0003] However, the power supply of the drive circuit in the related art either adopts a transformer solution or a switching power supply solution, which requires a large number of hardware circuits, which not o...

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Problems solved by technology

[0003] However, the power supply of the drive circuit in the related art either adopts a transformer solution or a switching power supply solution, which requires a large number of hardware circuits, which not only affects the layout design space, but also increases additional costs, and the overall circuit. Reliability is also poor, therefore, needs to be improved

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