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A bjt type single-phase bridge full control rectifier circuit

A fully-controlled rectification circuit and rectification circuit technology, which is applied to electrical components, AC power input conversion to DC power output, output power conversion devices, etc., can solve problems such as low drive efficiency and complex MOSFET drive circuits, and achieve drive efficiency High, simple circuit effect

Active Publication Date: 2017-08-11
JUBANG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of complex MOSFET drive circuit and low drive efficiency in the existing MOSFET type single-phase bridge fully controlled rectifier circuit, the present invention provides a BJT type single-phase bridge fully controlled rectifier with simplified drive circuit and high drive efficiency circuit

Method used

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  • A bjt type single-phase bridge full control rectifier circuit
  • A bjt type single-phase bridge full control rectifier circuit
  • A bjt type single-phase bridge full control rectifier circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: refer to figure 1 , image 3 and Figure 5 , Embodiment 1 of the present invention has an input voltage overvoltage protection function, which consists of 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, an NPN type BJT tube Q5, Composed of output capacitor Co, diode D1, diode D2, resistor R1, resistor R2, resistor R3, and controlled current source M1. Wherein, the controlled current source M1 is composed of an NPN type BJT transistor Qa1, a resistor Ra1, a resistor Ra2, a resistor Ra3, and a capacitor Ca1.

[0023] Such as image 3As shown, one end of the input capacitor Ci is simultaneously connected to the positive end of the single-phase AC power supply vac, the anode of the diode D1, the emitter of the PNP BJT transistor Q1, and the emitter of the NPN BJT transistor Q3. The electrode is connected to one end of the resistor R2, the collector of the PNP type BJT tube Q2, one end...

Embodiment 2

[0028] Embodiment 2: refer to figure 1 , Figure 4 and Figure 6 , Embodiment 2 of the present invention has the function of output 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, NPN type BJT tube Q5, Composed of output capacitor Co, diode D1, diode D2, resistor R1, resistor R2, resistor R3, and controlled current source M1. Wherein, the controlled current source M1 is composed of an NPN type BJT transistor Qb1, a diode Db1, a resistor Rb1, a resistor Rb2, and a capacitor Cb1.

[0029] Such as Figure 4 As shown, one end of the input capacitor Ci is simultaneously connected to the positive end of the single-phase AC power supply vac, the anode of the diode D1, the emitter of the PNP BJT transistor Q1, and the emitter of the NPN BJT transistor Q3. The electrode is connected to one end of the resistor R2, the collector of the PNP type BJT tube Q2, one end of the output...

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PUM

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Abstract

A BJT type single-phase bridge fully controlled rectifier circuit, the rectifier circuit includes 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, and an NPN type BJT tube Q5, output capacitor Co, diode D1, diode D2, resistor R1, resistor R2, resistor R3 and used to control the base current of NPN type BJT tube Q5 to realize the working state of PNP type BJT tube Q1 and PNP type BJT tube Q2 control of the controlled current source M1. The invention provides a BJT type single-phase bridge full-control rectification circuit with simplified driving circuit and high driving efficiency.

Description

technical field [0001] The invention relates to a rectification (AC-DC) circuit, which is applied to electric energy conversion occasions of AC input and DC output, such as: micro energy collection system, new energy power generation system, battery charging system, etc., especially a single-phase bridge full control rectifier circuit. Background technique [0002] The rectifier (AC-DC) circuit is a circuit that can convert AC power into DC power, and is widely used. According to the number of AC input phases, the rectifier circuit can be divided into single-phase circuit and multi-phase circuit; according to the circuit structure, the rectifier circuit can be divided into bridge circuit and zero-type circuit; control circuit, half control circuit and full control circuit. [0003] Fully controlled devices suitable for small and medium power applications mainly include MOSFETs and BJTs. In the early days, the BJT of Si material had disadvantages such as large driving loss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219
Inventor 陈怡
Owner JUBANG GRP CO LTD