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A boost PFC converter with integrated buck-boost output and its control method

A control method and converter technology, which are used in output power conversion devices, control/regulation systems, and DC power input conversion to DC power output, etc. Large and other problems, to achieve the effect of reducing volume, improving operating efficiency, and reducing driving resources

Active Publication Date: 2021-09-28
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

To achieve multi-load output, the number of power devices needs to be increased, occupying more control resources, increasing the size of the system, and increasing the cost

Method used

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  • A boost PFC converter with integrated buck-boost output and its control method
  • A boost PFC converter with integrated buck-boost output and its control method
  • A boost PFC converter with integrated buck-boost output and its control method

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The present invention designs a Boost PFC converter with integrated buck-boost output, which integrates the functions of the traditional Boost PFC converter and the Buck-boost DC-DC converter, such as figure 1 As shown, in practical applications, specifically including the AC power supply u s , the first diode D 1 , the second diode D 2 , the third diode D 3 , the fourth diode D 4 , the fifth diode D 5 , the sixth diode D 6 , the seventh diode D 7 , the first N-type IGBT transistor S 1 , the second N-type IGBT transistor S 2 , the third N-type IGBT transistor S 3 , the first electrolytic capacitor C 1 , the second electrolytic capacitor C 2 , the third electrolytic capacitor C 3 , the first inductance L 1 , the second inductance L 2 .

[0028] where the first N-type IGBT transistor S 1 the emitter ...

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Abstract

The invention relates to a Boost PFC converter with integrated buck-boost output, which adopts a novel power topology design, integrates the functions of a traditional Boost PFC converter and a Buck-boost DC-DC converter, and reduces the use of switching devices. The volume of the system is reduced, and the cost is reduced; at the same time, the control method for the Boost PFC converter is designed, which achieves integrated control, reduces driving resources, and can realize rectified output under power factor correction and Buck between dual load outputs. ‑boost DC‑DC conversion function improves system operating efficiency and power quality.

Description

technical field [0001] The invention relates to a Boost PFC converter with integrated buck-boost output and a control method, belonging to the technical field of power electronic power conversion. Background technique [0002] The uncontrolled rectifier circuit is simple and reliable, but it will generate high peak current, which will cause distortion of the current waveform at the AC input terminal, resulting in a decrease in the power factor of the AC side and a relatively large reactive power loss. In order to improve the power quality of uncontrolled rectifiers, Boost circuits are often used for power factor correction. The traditional BOOSTPFC circuit is composed of a diode rectifier bridge and a BOOST circuit, and the bus voltage is higher than the effective value of the AC voltage. To achieve multi-load output, the number of power devices needs to be increased, occupying more control resources, increasing the size of the system, and increasing the cost. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 蔡骏
Owner NANJING UNIV OF INFORMATION SCI & TECH
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