CN204578355U - A kind of quadratic form Buck power factor correcting converter - Google Patents
A kind of quadratic form Buck power factor correcting converter Download PDFInfo
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- CN204578355U CN204578355U CN201520164148.9U CN201520164148U CN204578355U CN 204578355 U CN204578355 U CN 204578355U CN 201520164148 U CN201520164148 U CN 201520164148U CN 204578355 U CN204578355 U CN 204578355U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本实用新型公开了一种二次型Buck功率因数校正变换器。交流电源VAC经过整流桥D1整流，整流桥的输出电压与LC滤波器相连接，LC滤波器的正端接二极管D2的阴极和电感L1的一端，LC滤波器的负端接二极管D3的阳极和开关管Q1的源级，二极管D3的阴极与二极管D2的阳极、二极管D4的阳极、以及电容C1的负极相连接，电感L1的另一端接电容C1的正极、二极管D5的阴极、和电感L2的一端，二极管D4的阴极接开关管Q1的漏级、二极管D5的阳极、输出电容C2的负极、以及输出负载RL的负端，电感L2的另一端接输出电容C2的正极、以及输出负载RL的正端。本实用新型仅仅需要采用一个控制器和一个开关管就可以同时实现功率因数校正功能和快速调节输出电压(电流)。
The utility model discloses a secondary Buck power factor correction converter. The AC power supply V AC is rectified by the rectifier bridge D1, the output voltage of the rectifier bridge is connected to the LC filter, the positive terminal of the LC filter is connected to the cathode of the diode D2 and one end of the inductor L1, and the negative terminal of the LC filter is connected to the diode The anode of D3 is connected to the source of switch tube Q1, the cathode of diode D3 is connected to the anode of diode D2 , the anode of diode D4, and the cathode of capacitor C1 , and the other end of inductor L1 is connected to capacitor C1 The anode of the diode D5, the cathode of the diode D5, and one end of the inductor L2 , the cathode of the diode D4 is connected to the drain of the switch Q1, the anode of the diode D5 , the negative pole of the output capacitor C2 , and the negative pole of the output load R L terminal, and the other terminal of the inductor L2 is connected to the positive terminal of the output capacitor C2 and the positive terminal of the output load RL . The utility model only needs to adopt a controller and a switch tube to simultaneously realize the power factor correction function and quickly adjust the output voltage (current).
Description
技术领域technical field
本实用新型涉及电力控制设备，尤其是一种二次型Buck功率因数校正变换器及其装置。The utility model relates to electric power control equipment, in particular to a secondary Buck power factor correction converter and a device thereof.
背景技术Background technique
近年来，电力电子技术迅速发展，作为电力电子领域重要组成部分的电源技术逐渐成为应用和研究的热点。开关电源以其效率高、功率密度高而确立了其在电源领域中的主流地位，但其通过整流器接入电网时会存在一个致命的弱点：功率因数较低(一般仅为0.45～0.75),且在电网中会产生大量的电流谐波和无功功率而污染电网。抑制开关电源产生谐波的方法主要有两种：一是被动法，即采用无源滤波或有源滤波电路来旁路或消除谐波；二是主动法，即设计新一代高性能整流器，它具有输入电流为正弦波、谐波含量低以及功率因数高等特点，即具有功率因数校正功能。开关电源功率因数校正研究的重点，主要是功率因数校正电路拓扑的研究和功率因数校正控制集成电路的开发。传统的单级功率因数校正变换器的输出电压(电流)纹波大，动态响应速度慢，因此如图1所示，在传统带有功率因数校正功能的系统中，通常采用两级变换器级联的结构，第一级变换器实现功率因数校正功能，第二级变换器实现快速调节输出电压(电流)，且每一级变换器独立控制，因此传统的带有功率因数校正功能的系统中至少含有两个控制器和两个开关管，控制复杂且成本高。In recent years, power electronics technology has developed rapidly, and power supply technology, which is an important part of the power electronics field, has gradually become a hot spot in application and research. Switching power supply has established its mainstream position in the field of power supply because of its high efficiency and high power density, but there will be a fatal weakness when it is connected to the power grid through a rectifier: the power factor is low (generally only 0.45 to 0.75), Moreover, a large number of current harmonics and reactive power will be generated in the grid to pollute the grid. There are two main methods for suppressing harmonics generated by switching power supplies: one is the passive method, that is, using passive filtering or active filtering circuits to bypass or eliminate harmonics; the other is the active method, that is, designing a new generation of high-performance rectifiers, which It has the characteristics of sine wave input current, low harmonic content and high power factor, that is, it has the function of power factor correction. The focus of research on switching power supply power factor correction is mainly the research of power factor correction circuit topology and the development of power factor correction control integrated circuits. The output voltage (current) ripple of the traditional single-stage power factor correction converter is large and the dynamic response speed is slow. Therefore, as shown in Figure 1, in the traditional system with power factor correction function, two-stage converter stages The first-stage converter realizes the power factor correction function, the second-stage converter realizes the fast adjustment of the output voltage (current), and each stage of the converter is independently controlled, so the traditional system with power factor correction function Contains at least two controllers and two switch tubes, the control is complicated and the cost is high.
实用新型内容Utility model content
本实用新型的目的是提供一种二次型Buck功率因数校正变换器装置，使之仅使用一个控制器和一个开关管，同时实现功率因数校正、快速调节输出电压(电流)、和低输出电压(电流)纹波，不使用变压器就可以实现高降压比。The purpose of this utility model is to provide a secondary Buck power factor correction converter device, so that it only uses one controller and one switch tube, and simultaneously realizes power factor correction, fast adjustment of output voltage (current), and low output voltage (current) ripple, high step-down ratios can be achieved without the use of transformers.
本实用新型实现其实用新型目的，所采用的技术方案是为：The utility model realizes its utility model purpose, and the technical scheme adopted is:
一种二次型Buck功率因数校正变换器，包括交流电源VAC、整流桥D1、LC滤波器，二极管D2、二极管D3、二极管D4、二极管D5、电感L1、电容C1、电感L2、电容C1、开关管Q1、电容C2、及其负载RL，其特征在于，交流电源VAC经过整流桥D1整流，整流桥的输出电压与LC滤波器相连接，LC滤波器的正端接二极管D2的阴极和电感L1的一端，LC滤波器的负端接二极管D3的阳极和开关管Q1的源级，二极管D3的阴极与二极管D2的阳极、二极管D4的阳极、以及电容C1的负极相连接，电感L1的另一端接电容C1的正极、二极管D5的阴极、和电感L2的一端，二极管D4的阴极接开关管Q1的漏级、二极管D5的阳极、输出电容C2的负极、以及输出负载RL的负端，电感L2的另一端接输出电容C2的正极、以及输出负载RL的正端。A secondary Buck power factor correction converter, including AC power supply V AC , rectifier bridge D 1 , LC filter, diode D 2 , diode D 3 , diode D 4 , diode D 5 , inductor L 1 , and capacitor C 1 , inductance L 2 , capacitor C 1 , switch tube Q 1 , capacitor C 2 , and its load R L , characterized in that the AC power supply V AC is rectified by the rectifier bridge D 1 , and the output voltage of the rectifier bridge is connected to the LC filter , the positive terminal of the LC filter is connected to the cathode of the diode D2 and one end of the inductor L1, the negative terminal of the LC filter is connected to the anode of the diode D3 and the source of the switching tube Q1, the cathode of the diode D3 is connected to the diode D2 The anode of the diode D4, the anode of the diode D4, and the negative pole of the capacitor C1 are connected, the other end of the inductor L1 is connected to the positive pole of the capacitor C1 , the cathode of the diode D5 , and one end of the inductor L2 , and the cathode of the diode D4 is connected to The drain of the switch tube Q1, the anode of the diode D5 , the negative pole of the output capacitor C2 , and the negative terminal of the output load RL , the other end of the inductor L2 is connected to the positive pole of the output capacitor C2 , and the output load R L Positive.
与现有技术相比，本实用新型的有益效果是：Compared with the prior art, the beneficial effects of the utility model are:
1、相对于传统的两级级联有功率因数校正功能的变换器，采用本实用新型的二次型Buck功率因数校正变换器，仅仅使用一个开关管和一个控制器，降低了开关管和控制器的数量，降低了整个系统的成本，降低了整个系统的设计难度，提高了功率密度；2、相对于传统的单级功率因数校正变换器，采用本实用新型的二次型Buck功率因数校正变换器，在实现功率因数校正功能的同时，也实现了快速调节输出电压(电流)和低输出电压(电流)纹波的功能。1. Compared with the traditional two-stage cascaded converter with power factor correction function, the utility model adopts the secondary Buck power factor correction converter, which only uses one switch tube and one controller, which reduces the switch tube and control The number of converters reduces the cost of the entire system, reduces the design difficulty of the entire system, and increases the power density; 2. Compared with the traditional single-stage power factor correction converter, the utility model adopts the secondary Buck power factor correction The converter, while realizing the power factor correction function, also realizes the function of quickly adjusting the output voltage (current) and low output voltage (current) ripple.
附图说明Description of drawings
图1为传统两级级联功率因数校正变换器系统结构框图。Figure 1 is a block diagram of a traditional two-stage cascaded power factor correction converter system.
图2为二次型Buck功率因数校正变换器电路图。Figure 2 is a circuit diagram of a secondary Buck power factor correction converter.
图3为本实用新型实施例一电路框图。Fig. 3 is a circuit block diagram of Embodiment 1 of the present utility model.
图4为实施例一的实验波形图。测试条件：输入电压为110V/60Hz，输出为350mA的恒流源，输出负载为LED，LED的正向电压为20V。FIG. 4 is an experimental waveform diagram of Embodiment 1. Test conditions: the input voltage is 110V/60Hz, the output is a constant current source of 350mA, the output load is LED, and the forward voltage of LED is 20V.
图5为本实用新型实施例二的电路结构示意图。FIG. 5 is a schematic diagram of the circuit structure of the second embodiment of the utility model.
具体实施方式Detailed ways
下面通过具体的实例并结合附图对本实用新型做进一步详细的描述。The utility model is described in further detail below through specific examples in conjunction with the accompanying drawings.
实施例一Embodiment one
图3为本实用新型实施例一的结构框图，图4为图3所示电路的实验波形。图3示出，本实用新型的例一具体实施方式为，一种恒流输出的二次型Buck功率因数校正变换器，其具体作法是：Fig. 3 is a structural block diagram of Embodiment 1 of the utility model, and Fig. 4 is an experimental waveform of the circuit shown in Fig. 3 . Fig. 3 shows that the specific embodiment of example one of the present utility model is a secondary Buck power factor correction converter with constant current output, and its specific method is:
交流电源VAC经过整流桥D1整流，整流桥的输出电压与LC滤波器相连接，LC滤波器的正端接二极管D2的阴极和电感L1的一端，LC滤波器的负端接二极管D3的阳极和开关管Q1的源级，二极管D3的阴极与二极管D2的阳极、二极管D4的阳极、以及电容C1的负极相连接，电感L1的另一端接电容C1的正极、二极管D5的阴极、和电感L2的一端，二极管D4的阴极接开关管Q1的漏级、二极管D5的阳极、输出电容C2的负极、以及输出电流采样电阻RS的一端，电感L2的另一端接输出电容C2的正极、以及输出恒流源负载的正端，输出恒流源负载的负端接输出电流采样电阻RS的另一端。运算放大器把输出电流采样电阻的电压与基准电压相比较，光耦将运算放大器输出的误差信号传递到比较器的负端，比较器和RS触发器根据误差信号和锯齿波调节开关管Q1的占空比，从而稳定输出电流。The AC power supply V AC is rectified by the rectifier bridge D1, the output voltage of the rectifier bridge is connected to the LC filter, the positive terminal of the LC filter is connected to the cathode of the diode D2 and one end of the inductor L1, and the negative terminal of the LC filter is connected to the diode The anode of D3 is connected to the source of switch tube Q1, the cathode of diode D3 is connected to the anode of diode D2 , the anode of diode D4, and the cathode of capacitor C1 , and the other end of inductor L1 is connected to capacitor C1 The anode of the diode D5, the cathode of the diode D5, and one end of the inductor L2 , the cathode of the diode D4 is connected to the drain of the switch Q1, the anode of the diode D5 , the cathode of the output capacitor C2 , and the output current sampling resistor R S One end of the inductor L2, the other end of the inductor L2 is connected to the positive pole of the output capacitor C2 and the positive end of the output constant current source load, and the negative end of the output constant current source load is connected to the other end of the output current sampling resistor R S. The operational amplifier compares the voltage of the output current sampling resistor with the reference voltage, the optocoupler transmits the error signal output by the operational amplifier to the negative terminal of the comparator, and the comparator and RS flip - flop adjust the switching tube Q1 according to the error signal and the sawtooth wave duty cycle, thereby stabilizing the output current.
图4为图3所示电路的实验波形，实验电路的输入电压为交流110V，交流输入的频率为60Hz，输出负载的额定电压为20V，输出电流为350mA。从图4波形可以看出：Figure 4 is the experimental waveform of the circuit shown in Figure 3. The input voltage of the experimental circuit is AC 110V, the AC input frequency is 60Hz, the rated voltage of the output load is 20V, and the output current is 350mA. It can be seen from the waveform in Figure 4 that:
输出电流稳定在350mA，输出电流纹波小，且输出电流没有二倍工频纹波成份，从输入电流可以看出变换器实验功率因数校正功能。The output current is stable at 350mA, the output current ripple is small, and the output current has no double power frequency ripple component. From the input current, it can be seen that the converter has an experimental power factor correction function.
实施例二Embodiment two
图5为本实用新型实施例二的结构框图，图5示出本实用新型的例二具体实施方式为，一种恒压输出的二次型Buck功率因数校正变换器，其具体作法是：交流电源VAC经过整流桥D1整流，整流桥的输出电压与LC滤波器相连接，LC滤波器的正端接二极管D2的阴极和电感L1的一端，LC滤波器的负端接二极管D3的阳极和开关管Q1的源级，二极管D3的阴极与二极管D2的阳极、二极管D4的阳极、以及电容C1的负极相连接，电感L1的另一端接电容C1的正极、二极管D5的阴极、输出负载RL的正端、和输出电容C2的正极，二极管D4的阴极接开关管Q1的漏级、二极管D5的阳极、电感L2的一端，电感L2的另一端接输出电容C2的负极、以及输出负载RL的负端，输出电压采样电阻R1的一端连接输出负载RL的正端，输出电压采样电阻R1的另一端连接输出电压采样电阻R2的一端、和运算放大器的负端，输出电压采样电阻R2的另一端连接输出负载RL的负端。运算放大器把运算放大器负端电压与正端的基准电压相比较，光耦将运算放大器输出的误差信号传递到比较器的负端，比较器和RS触发器根据误差信号和锯齿波调节开关管Q1的占空比，从而稳定输出电压。Fig. 5 is a structural block diagram of the second embodiment of the utility model, and Fig. 5 shows that the second specific embodiment of the utility model is a secondary Buck power factor correction converter with constant voltage output, and its specific method is: AC The power supply V AC is rectified by the rectifier bridge D1, the output voltage of the rectifier bridge is connected to the LC filter, the positive terminal of the LC filter is connected to the cathode of the diode D2 and one end of the inductor L1, and the negative terminal of the LC filter is connected to the diode D The anode of the diode D3 is connected to the source of the switching tube Q1, the cathode of the diode D3 is connected to the anode of the diode D2 , the anode of the diode D4, and the cathode of the capacitor C1 , and the other end of the inductor L1 is connected to the capacitor C1 Anode , the cathode of diode D5, the positive terminal of output load RL , and the anode of output capacitor C2 , the cathode of diode D4 is connected to the drain stage of switch Q1, the anode of diode D5 , and one end of inductor L2 , The other end of the inductor L 2 is connected to the negative terminal of the output capacitor C 2 and the negative terminal of the output load RL , one end of the output voltage sampling resistor R 1 is connected to the positive terminal of the output load RL , and the other end of the output voltage sampling resistor R 1 is connected to One end of the output voltage sampling resistor R2 is connected to the negative end of the operational amplifier, and the other end of the output voltage sampling resistor R2 is connected to the negative end of the output load RL . The operational amplifier compares the negative terminal voltage of the operational amplifier with the reference voltage of the positive terminal, and the optocoupler transmits the error signal output by the operational amplifier to the negative terminal of the comparator, and the comparator and RS flip-flop adjust the switch tube Q 1 according to the error signal and the sawtooth wave duty cycle, thereby stabilizing the output voltage.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554952A (en) * | 2016-01-22 | 2016-05-04 | 江苏大学 | Interleaving LED drive circuit based on quadratic form Buck and working method thereof |
| CN108770117A (en) * | 2018-05-10 | 2018-11-06 | 四川大学 | A kind of integrated LED drive power of compatible electronic transformer |
| CN108809090A (en) * | 2018-06-19 | 2018-11-13 | 四川大学 | A kind of High Power Factor multichannel low ripple constant current output switch converters |
-
2015
- 2015-03-23 CN CN201520164148.9U patent/CN204578355U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554952A (en) * | 2016-01-22 | 2016-05-04 | 江苏大学 | Interleaving LED drive circuit based on quadratic form Buck and working method thereof |
| CN105554952B (en) * | 2016-01-22 | 2018-02-27 | 江苏大学 | A kind of crisscross parallel LED drive circuit and its method of work based on quadratic form Buck |
| CN108770117A (en) * | 2018-05-10 | 2018-11-06 | 四川大学 | A kind of integrated LED drive power of compatible electronic transformer |
| CN108809090A (en) * | 2018-06-19 | 2018-11-13 | 四川大学 | A kind of High Power Factor multichannel low ripple constant current output switch converters |
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