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A Feedback Type Single-phase Bridge Rectifier Circuit with Limited Input Current Envelope

A technology of single-phase bridge rectification and input current, which is applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., and can solve threats to circuit reliability and safety, envelope peak value iac_enp Issues such as less than effective suppression

Active Publication Date: 2018-09-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a rectifier circuit with a wide input voltage range, the lack of effective suppression of the envelope peak iac_enp of the input current iac will threaten the reliability and safety of the entire circuit

Method used

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  • A Feedback Type Single-phase Bridge Rectifier Circuit with Limited Input Current Envelope
  • A Feedback Type Single-phase Bridge Rectifier Circuit with Limited Input Current Envelope
  • A Feedback Type Single-phase Bridge Rectifier Circuit with Limited Input Current Envelope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: refer to image 3 and Figure 4, the DC voltage control DC current source VCCS1 of Embodiment 1 of the present invention comprises diode Da1, resistor Ra1, resistor Ra2, resistor Ra3, resistor Ra4, resistor Ra5, capacitor Ca1, NPN type BJT tube Qa1 and NPN type BJT tube Qa2, diode The anode of Da1 constitutes the input terminal 1a of the DC voltage control DC current source VCCS1, the cathode of the diode Da1 is connected to one end of the resistor Ra5, the other end of the resistor Ra5 is connected to one end of the capacitor Ca1 and one end of the resistor Ra4 at the same time, and the other end of the capacitor Ca1 It constitutes the input terminal 1b of the DC voltage control DC current source VCCS1, the other end of the resistor Ra4 is connected to the base of the NPN BJT transistor Qa2, and the collector of the NPN BJT transistor Qa2 is simultaneously connected to the base of the NPN BJT transistor Qa1 and the resistor Ra2 One end of the resistor Ra...

Embodiment 2

[0057] Embodiment 2: refer to image 3 and Figure 6 , the DC voltage control DC current source VCCS1 of Embodiment 2 of the present invention comprises a three-port multiple voltage circuit, diode Db6, resistor Rb1, resistor Rb2, resistor Rb3, resistor Rb4 and PNP type BJT tube Qb1, multiple voltage circuit The port c of the direct voltage controls the input end 1a of the direct current source VCCS1, the port d of the multiplier circuit forms the input end 1b of the direct voltage control direct current source VCCS1, the port e of the multiplier circuit and the diode Db6 The anode of the diode Db6 is connected to one end of the resistor Rb4, the other end of the resistor Rb4 is connected to one end of the resistor Rb3 and the base of the PNP type BJT tube Qb1, and the emitter of the PNP type BJT tube Qb1 is connected to one end of the resistor Rb1 The other end of the resistor Rb1 forms the output terminal 2a of the DC voltage control DC current source VCCS1, the collector o...

Embodiment 3

[0065] Embodiment 3: refer to image 3 , Figure 4 , Figure 8 and Figure 9 , on the basis of Embodiment 1, a current harmonic compensation branch is added. Port a of the current harmonic compensation branch is connected to one end of the segmented access load Z1, port b of the current harmonic compensation branch is connected to the other end of the segmented access load Z1, when f1( When u1)>0 and the switches S1 to Sn in the segmented access load Z1 are all turned off, the current harmonic compensation branch works, and the current i2 flowing from port a of the current harmonic compensation branch>0, If C2 is small enough, the absolute value of the input current iac |iac|≈i2 at this time; when any of the switches S1 to Sn is turned on, the current harmonic compensation branch does not work, and the current harmonic compensation flows into The current i2≈0 at branch port a.

[0066] The current harmonic compensation branch is composed of a resistor Rc1, a resistor Rc2,...

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Abstract

A single-phase bridge rectifier circuit with feedback type limiting input current envelope, including PNP type BJT tube Q1, PNP type BJT tube Q2, input capacitor C1, output capacitor C2, diode D1, diode D2 and DC voltage control DC current Source VCCS1, DC voltage control DC current source VCCS1 limits the envelope iac_en of the input current iac within the allowable input voltage range, that is, the increment of the envelope peak value iac_enp of the input current iac is smaller than the increment of the effective value Vac of the input voltage vac, The delta iac_enp also includes the envelope peak value of the input current iac as a negative number. The invention utilizes the characteristics of segmented access loads to effectively suppress the envelope increment of the input current in a wide input voltage range through a feed-back manner, and improves the safety and reliability of the single-phase bridge rectifier circuit.

Description

technical field [0001] The invention relates to a rectification (AC-DC) circuit, which is applied to the electric energy conversion occasion of AC input and DC output, especially a single-phase bridge rectification circuit with the function of limiting the input current envelope, which is suitable for segmented access load systems , the sub-loads in the applicable segmented access loads may include constant-voltage loads such as LEDs and Zener tubes. Background technique [0002] Single-phase bridge rectification (AC-DC) circuit is a circuit that can convert AC power into DC power, and it is widely used. However, quite a few of the current common single-phase bridge rectifier circuits do not have the function of limiting the input current envelope. Take a common single-phase bridge rectifier circuit as an example (see figure 1 ), the single-phase bridge rectifier circuit is composed of PNP type BJT tube Q1, PNP type BJT tube Q2, input capacitor C1, output capacitor C2, dio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M1/12
CPCH02M1/12H02M7/219H02M1/0038
Inventor 陈怡
Owner ZHEJIANG UNIV OF TECH
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