Electronic circuit and air conditioner
A technology of electronic circuits and capacitors, which is applied in the field of electronic circuits and air conditioners, can solve the problems of unbalanced three-phase current, large harmonics, and difficult to meet, and achieve the effect of reducing harmonics
Pending Publication Date: 2022-04-12
CHONGQING MIDEA REFRIGERATION EQUIP CO LTD +1
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Problems solved by technology
For this technical solution, the load supplied by this phase of the DC fan or auxiliary power supply will be higher than that of the other two phases, and this part of the increased load will not pass through the two-level active PFC circuit, resulting in larger current harmonics in this phase, The three-phase current is unbalanced, and it is difficult to meet the harmonic requirements of IEC (International Electro technical Commission, International Electrotechnical Commission)
Method used
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[0049] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0050] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in ...
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The invention provides an electronic circuit and an air conditioner, the electronic circuit comprises a rectifier module and an energy storage module, the rectifier module comprises a three-phase rectifier bridge and a bidirectional switch assembly, and the three-phase rectifier bridge comprises a first bridge arm, a second bridge arm and a third bridge arm which are connected in parallel; the bidirectional switch assembly comprises a first bidirectional switch, a second bidirectional switch and a third bidirectional switch; the energy storage module is connected with the direct current output end of the rectification module, and the energy storage module comprises two capacitors which are connected in series; wherein at least one capacitor is connected with a direct-current load in parallel. According to the invention, the direct current fan load or the auxiliary power supply and other direct current loads with low voltage withstanding performance are connected in parallel to the capacitor in the energy storage module, so that the capacitor in the energy storage module can supply power to the direct current fan load or the auxiliary power supply and other direct current loads with low voltage withstanding performance, and the three-phase current of the three-phase alternating current power supply can be balanced. A certain phase current harmonic wave is prevented from being obviously large, and the harmonic wave can be effectively reduced.
Description
technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an electronic circuit and an air conditioner. Background technique [0002] In the three-phase power supply, in addition to the inverter compressor load, there will also be a DC fan load or an auxiliary power supply. The existing technical solutions are generally: the three-phase power supply passes through a passive PFC (Power Factor Correction) rectifier circuit or a two-level active PFC rectifier circuit to output the high-voltage DC bus voltage, and the load of the inverter compressor is connected to the high-voltage DC The bus voltage; and because the voltage on the high-voltage DC bus exceeds the DC input voltage requirement of the IPM (Intelligent Power Module, Intelligent Power Module) of the DC fan load or the auxiliary power supply, the DC fan load or the auxiliary power supply does not change from the high-voltage DC bus voltage. Instead, it supplies power...
Claims
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Login to View More IPC IPC(8): H02M7/219H02M1/12F24F11/88
Inventor 黄招彬龙谭赵鸣杨建宁徐锦清曾贤杰霍兆镜文先仕
Owner CHONGQING MIDEA REFRIGERATION EQUIP CO LTD