Bridgeless power factor correction converter
A power factor correction and converter technology, applied in the field of circuits, can solve the problems of complex input current sampling control and complex implementation, and achieve the effects of high implementation difficulty, reducing circuit loss, and simplifying the main circuit
Pending Publication Date: 2022-05-17
HANGZHOU YOUTE POWER CO LTD
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However, the sampling control of the input current in this scheme is relatively complicated, and it is often necessary to sample multiple current signals, such as RS1, RS2, and RS3, and then obtain the control current signal through superposition operations, etc., to realize complex
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0026] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplified description, rathe...
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The invention relates to a bridgeless power factor correction converter. According to the scheme, the bridgeless power factor correction converter comprises a main circuit and a power factor correction control circuit, the main circuit comprises an input side power grid, a first inductor, a first diode, a second diode and a second inductor; the anode of the first diode is connected with the first end of the first switch tube, the second end of the first switch tube is connected with the first end of the sampling resistor, and the second end of the sampling resistor is connected with the second end of the second switch tube; the power factor correction control circuit is used for respectively acquiring a voltage signal of the sampling resistor, a voltage difference between an L line and an N line of an input side power grid and a voltage of the second filter capacitor; the power factor correction control circuit controls the first switch tube and the second switch tube to be switched on and switched off according to the acquired data, so that the input current of the input side power grid is proportional to the input voltage of the input side power grid, and the input current is represented as a sine wave. The circuit has the advantages of few sampling signals, simple circuit implementation and low control difficulty.
Description
technical field [0001] The invention relates to the field of circuit technology, in particular to a bridgeless power factor correction converter. Background technique [0002] The power factor refers to the ratio between the effective power and the apparent power. The power factor is a parameter used to measure the power consumption efficiency of the electrical equipment. The power factor can be used to measure the degree to which the power is effectively used. Indicates the higher the utilization rate of electric power. Therefore, the power utilization rate of the electrical equipment can be improved through the adjustment of the power factor by the corresponding circuit, that is, the power factor correction circuit (Power Factor Correction). [0003] At present, the large and frequent use of power electronic devices has caused serious harmonic pollution to the power grid, so PFC (power factor correction) circuits must be introduced to reduce harmonic pollution in the powe...
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IPC IPC(8): H02M1/42H02M7/217H02M1/00
CPCH02M1/4216H02M7/217H02M1/00
Inventor 毛昭祺王纪周柯乃泉
Owner HANGZHOU YOUTE POWER CO LTD