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An improved bridgeless dual-boost power factor correction rectifier with capacitive voltage division

A technology of power factor correction and capacitive voltage division, which is applied in the conversion of AC power input to DC power output, output power conversion devices, electrical components, etc. Efficiency and Power Density, Cost and EMI Reduction

Active Publication Date: 2021-09-28
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transformer core cannot be reset within one switching cycle. The selected transformer core is bulky and requires two sets of auxiliary circuits to realize the auxiliary commutation work of the main switch under bidirectional current output; and the auxiliary commutation diode has no clamping measures, and the overcharge vibration Bells cause high voltage stress and EMI

Method used

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  • An improved bridgeless dual-boost power factor correction rectifier with capacitive voltage division
  • An improved bridgeless dual-boost power factor correction rectifier with capacitive voltage division
  • An improved bridgeless dual-boost power factor correction rectifier with capacitive voltage division

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Embodiment Construction

[0073] Such as Figure 1-Figure 7 As shown, the present invention provides an improved bridgeless dual Boost power factor correction rectifier with capacitive voltage division, including a first main switch tube S 1 , the second main switch S 2 , the third main switch S 3 , the fourth main switch S 4 , the first filter inductance T f1 , the second filter inductance T f2 , AC power supply V AC , DC power supply V DC , the first auxiliary capacitor C a1 , the second auxiliary capacitor C a2 , the first auxiliary switch tube Q a1 , the second auxiliary switch tube Q a2 , the third auxiliary switch tube Q a3 , the fourth auxiliary switch tube Q a4 , Auxiliary commutation inductance L AUX , the first main switch S 1 The source of the second main switch S 2 The drain of the main switch is connected to point P to form the left bridge arm of the main switch; the third main switch S 3 source of the fourth main switch S 4 The drain is connected to the Q point, which cons...

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Abstract

The invention discloses an improved bridgeless double Boost power factor correction rectifier with capacitive voltage division, which can realize ZVS conduction of a main circuit switch and ZCS conduction of an auxiliary circuit switch. The fully controlled switch replaces the traditional rectifier diode, and the main circuit has two charging states. Two-way two-way auxiliary switch works in ping-pong. The resonant inductor current commutates alternately, and the charge balance keeps the voltage dividing point of the capacitor in a constant voltage state within one switching cycle. Effectively improve efficiency and power density, reduce cost and EMI.

Description

technical field [0001] The invention relates to the technical field of electric power electronic conversion, in particular to an improved bridgeless double Boost power factor correction rectifier with capacitive voltage division. Background technique [0002] Power factor correction PFC is usually used to improve power factor PF and reduce total harmonic distortion. Among many PFC circuits, Boost converters are widely used because of their simple structure, continuous input current and strong uniformity of characteristics. Among them, the bridgeless BoostPFC reduces the conduction loss by reducing the number of semiconductor devices on the working circuit, so as to achieve the purpose of improving efficiency. However, the problem of switching loss in bridgeless PFC is prominent. When the switching frequency is increased, the switching loss in the circuit will increase accordingly, especially when the circuit works in CCM, the reverse recovery current of the freewheeling dio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M7/219H02M1/42
CPCH02M1/4208H02M7/217H02M7/219H02M1/0058Y02B70/10
Inventor 禹健安永泉
Owner SHANXI UNIV