Totem pole PFC circuit and control method thereof, circuit board, air conditioner and storage medium
A totem pole and controller technology, applied in the direction of AC motor control, control system, power factor control, etc., can solve the influence of input current harmonics and power factor, totem pole PFC circuit conduction loss becomes high, and diode voltage drop is large. and other problems to achieve the effect of improving harmonics and power factor
Pending Publication Date: 2022-01-25
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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Problems solved by technology
[0002] At present, the equipment connected to the power grid requires power factor correction (Power Factor Correction, PFC) on the input side. The bridge circuit of the existing totem pole PFC circuit is generally implemented by a diode. However, due to the large voltage drop of the diode, it will make the totem pole The conduction loss of the PFC circuit becomes higher, which affects the input current harmonics and power factor
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[0102] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0103] It should be understood that in the description of the embodiments of the present invention, multiple (or multiple) means two or more, greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the ind...
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The invention discloses a totem pole PFC circuit and a control method thereof, a circuit board, an air conditioner and a storage medium. According to the totem pole PFC circuit, a controller is arranged to send pulse signals to a third switching device at the positive half wave of an alternating current voltage signal and send pulse signals to a fourth switching device at the negative half wave of the alternating current voltage signal, so that a first oscillation circuit and a second oscillation circuit are formed respectively, and energy storage and energy release of an inductance device can be achieved. Therefore, the waveform of the input current is controlled, the waveform of the input current changes along with the alternating current voltage signal, and input current harmonic waves and power factors are improved. Besides, by arranging a fifth switching device, the first energy storage device and the second energy storage device can be charged and discharged respectively, so that the totem-pole PFC circuit outputs the first voltage, and a totem-pole voltage-multiplying scheme is realized.
Description
technical field [0001] The invention relates to the field of PFC control, in particular to a totem pole PFC circuit and a control method thereof, a circuit board, an air conditioner and a storage medium. Background technique [0002] At present, the equipment connected to the grid requires power factor correction (Power FactorCorrection, PFC) on the input side. The bridge circuit of the existing totem pole PFC circuit is generally implemented by a diode. However, due to the large voltage drop of the diode, it will make the totem pole The conduction loss of the PFC circuit becomes higher, which affects the input current harmonics and power factor. Contents of the invention [0003] The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims. [0004] Embodiments of the present invention provide a totem pole PFC circuit and its control method, a circuit board, an air conditioner, and a storag...
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Login to View More IPC IPC(8): H02M1/42H02M7/219H02M7/04H02M1/12H02P27/06
CPCH02M1/4233H02M1/4225H02M7/219H02M7/04H02M1/12H02P27/06H02M1/42H02P23/26Y02B70/10
Inventor 曾贤杰徐锦清文先仕张杰楠胡斌钟雄斌黄招彬
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD