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Self-exciting BJT type bridge-free Zeta PFC rectifier circuit

A rectifier circuit, self-excited technology, applied in electrical components, high-efficiency power electronic conversion, AC power input conversion to DC power output, etc., can solve problems such as low drive efficiency, poor self-starting performance, and complex MOSFET drive circuits. Achieve the effect of high driving efficiency, easy self-starting and simple circuit

Active Publication Date: 2015-12-30
沛县度创科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing MOSFET type bridgeless ZetaPFC rectifier circuit, the MOSFET drive circuit is complicated, the driving efficiency is low, and the self-starting performance is poor, the present invention provides a simplified driving circuit structure, high driving efficiency, and easy self-starting The performance of self-excited BJT bridgeless ZetaPFC rectifier circuit

Method used

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  • Self-exciting BJT type bridge-free Zeta PFC rectifier circuit
  • Self-exciting BJT type bridge-free Zeta PFC rectifier circuit
  • Self-exciting BJT type bridge-free Zeta PFC rectifier circuit

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Embodiment 1

[0025] Embodiment 1: refer to figure 1 , image 3 , Figure 5 and Image 6 , Embodiment 1 of the present invention has the function of input current limiting protection, which consists of input capacitor Ci, PNP type BJT tube Q1, PNP type BJT tube Q2, NPN type BJT tube Q3, NPN type BJT tube Q4, PNP type BJT tube Q5, PNP type BJT tube Q6, diode D1, diode D2, inductor L1, inductor L2, capacitor Cs, output capacitor Co, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, controlled current source group M1 . Among them, the controlled current source M1 is composed of NPN type BJT tube Qa1, NPN type BJT tube Qa2, NPN type BJT tube Qa3, NPN type BJT tube Qa4, resistor Ra1, resistor Ra2, resistor Ra3, resistor Ra4, resistor Ra5, resistor Ra6 composition.

[0026] like image 3 As shown, one end of the input capacitor Ci is simultaneously connected to the positive end of the AC power supply vac, one end of the resistor R4, the emitter of the PNP BJT tra...

Embodiment 2

[0038] Embodiment 2: refer to figure 1 , Figure 4 , Figure 7 and Figure 8 , Embodiment 2 of the present invention has an output voltage stabilizing function, which consists of input capacitor Ci, PNP type BJT tube Q1, PNP type BJT tube Q2, NPN type BJT tube Q3, NPN type BJT tube Q4, PNP type BJT tube Q5, PNP type BJT tube Q5, PNP type BJT tube Q6, diode D1, diode D2, inductor L1, inductor L2, capacitor Cs, output capacitor Co, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, controlled current source group M1. Among them, the controlled current source group M1 is composed of NPN type BJT tube Qb1, NPN type BJT tube Qb2, NPN type BJT tube Qb3, NPN type BJT tube Qb4, resistor Rb1, resistor Rb2, resistor Rb3, resistor Rb4, resistor Rb5, resistor Composed of Rb6, resistor Rb7, resistor Rb8, and capacitor Cb1.

[0039] like Figure 4As shown, one end of the input capacitor Ci is simultaneously connected to the positive end of the AC power supply...

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PUM

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Abstract

A self-exciting BJT type bridge-free Zeta PFC rectifier circuit comprises an input capacitor Ci, a PNP type BJT tube Q1, a PNP type BJT tube Q2, an NPN type BJT tube Q3, an NPN type BJT tube Q4, a PNP type BJT tube Q5, a PNP type BJT tube Q6, a diode D1, a diode D2, an inductor L1, an inductor L2, a capacitor Cs, an output capacitor Co, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6 and a controllable current source group M1, wherein the controllable current source group M1 is used for controlling base current of the PNP type BJT tube Q1 through a port so as to control the working state of the PNP type BJT tube Q1 and controlling base current of the PNP type BJT tube Q2 tube through a port b so as to control the working state of the PNP type BJT tube Q2. By means of the self-exciting BJT type bridge-free Zeta PFC rectifier circuit, a driving circuit structure is simplified, the driving efficiency is higher, and the performance of easy self start is obtained.

Description

technical field [0001] The invention relates to a PFC rectifier circuit, which is applied to high-quality electric energy conversion occasions of AC input and DC output, such as: micro energy collection system, new energy power generation system, battery charging system, LED lighting system, etc., especially a bridgeless ZetaPFC rectifier circuit. Background technique [0002] PFC rectifier circuit is a circuit with power factor correction (PFC) function that can convert AC power into DC power, which can improve the utilization rate of DC load to AC power and reduce the pollution of current harmonics to AC bus or AC power grid. . [0003] The traditional ZetaPFC rectifier circuit is a PFC rectifier circuit, and its main circuit is generally composed of a bridge rectifier circuit cascaded with a Zeta circuit. In order to reduce the loss of the bridge rectifier circuit, a bridgeless ZetaPFC rectifier circuit came into being. The bridgeless zetaPFC rectifier circuit mainly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M7/219
CPCY02B70/10
Inventor 陈怡南余荣
Owner 沛县度创科技发展有限公司
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