CN113595425A - 基于h桥交叉载波磁耦合控制的五电平逆变电源 - Google Patents

基于h桥交叉载波磁耦合控制的五电平逆变电源 Download PDF

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CN113595425A
CN113595425A CN202111054584.7A CN202111054584A CN113595425A CN 113595425 A CN113595425 A CN 113595425A CN 202111054584 A CN202111054584 A CN 202111054584A CN 113595425 A CN113595425 A CN 113595425A
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bridge
control
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梁光耀
刘广财
陈欣
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Setri Group Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/501—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode sinusoidal output voltages being obtained by the combination of several pulse-voltages having different amplitude and width
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

本发明涉及一种基于H桥交叉载波磁耦合控制的五电平逆变电源，包括1个直流电源、2个H桥逆变器、1个双分励滤波变压器及1个滤波电容C，直流电源作为输入端接2个H桥逆变器，2个H桥之间采取交叉载波模式进行交叠控制，载波之间相位差180度，2个H桥逆变器输出端分别接变压器的两组原边绕组，变压器副边绕组输出五电平PWM，再经并联的电容后输出正弦波。适合用于产生高品质正弦波。本发明电源采用两电平的控制电路，通过H桥PWM控制，交叉载波控制及磁耦合技术相结合达到输出5电平的目的，省却了繁琐的多电平矢量控制及中点电位的调节控制。通过简单的电路实现了高性能的要求。

Description

基于H桥交叉载波磁耦合控制的五电平逆变电源
技术领域
本发明涉及一种电源技术，特别涉及一种基于H桥交叉载波磁耦合控制的五电平逆变电源。
背景技术
随着电源技术发展，H桥作为常规设计手段。桥式H桥一般是针对单相系统设计的逆变器，正常情况下T1/T4波形一致，T2/T3波形一致，相互为互补对管，可以生成2电平逆变器，其主要特点是控制简单，易于调试。但其存在dV/dT过大，损耗大效率低，输出波形差的特点。在需要同样THD的要求下，必须要提高开关频率。
发明内容
针对配置各种负载所需纯正弦波问题，提出了一种基于H桥交叉载波磁耦合控制的五电平逆变电源，输出高质量的正弦波为目的，同时希望以采用最少的器件，最简易的控制来达到此目的。
本发明的技术方案为：一种基于H桥交叉载波磁耦合控制的五电平逆变电源，包括1个直流电源、2个H桥逆变器、1个双分励滤波变压器及1个滤波电容C，直流电源作为输入端接2个H桥逆变器，2个H桥之间采取交叉载波模式进行交叠控制，载波之间相位差180度，2个H桥逆变器输出端分别接双分励滤波变压器的两组原边绕组，双分励滤波变压器副边绕组输出五电平PWM，五电平PWM经并联的电容后输出正弦波。
优选的，所述H桥逆变器输入端采用无中点的直流电供电方式。
优选的，所述双分励滤波变压器作为电感与滤波电容构成低通滤波器，滤除双分励滤波变压器输出的高频分量。。
本发明的有益效果在于：本发明基于H桥交叉载波磁耦合控制的五电平逆变电源，采用正常两电平的控制电路，通过H桥PWM控制，交叉载波控制及磁耦合技术达到输出5电平的的目的，省却了繁琐的多电平矢量控制及中点电位的调节控制等。通过简单的电路实现了高性能高品质五电平交流电，匹配不同负载电压。
附图说明
图1为本发明基于H桥交叉载波磁耦合控制的五电平逆变电源结构示意图；
图2为H桥常规控制输出示意图；
图3为本发明2H桥控制端交叉载波示意图；
图4为本发明基于H桥交叉载波磁耦合控制的五电平逆变电源中变压器输出电压波形图；
图5为本发明基于H桥交叉载波磁耦合控制的五电平逆变电源输出波形图。
具体实施方式
下面结合附图和具体实施例对本发明进行详细说明。本实施例以本发明技术方案为前提进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。
如图1所示本发明基于H桥交叉载波磁耦合控制的五电平逆变电源结构示意图，主回路包括1个直流电源、2个H桥逆变器(1#H、2#H)、1个双分励滤波变压器(TRAN)及1个滤波电容C，1个直流电源(DC+、DC-)作为输入端接2个H桥逆变器，2个H桥逆变器输出端分别接变压器的两组原边绕组，变压器副边绕组并联滤波电容C输出。
H桥逆变器输入端采用无中点的直流电直流供电方式，避免了中点电位的控制。H桥的4个IGBT模块Sx1/x2/x3/x4采用独立控制方式，可以形成5个向量，其中1个‘全关’向量，2个‘0’向量，1个‘1’向量及1个‘-1’向量。通过控制在H桥输出端输出‘1’，‘0’，‘-1’三个有效向量，生成3电平PWM，如图2所示。
2个H桥之间采取交叉载波模式进行交叠控制，载波之间相位差180度，如图3所示三角交叉载波，经过滤波变压器的磁耦合，在输出端形成5电平输出波形(如图4)，再经过滤波电容的滤波得到纯净的正弦波电源(如图5)。
2个H桥输出作为变压器的输入，两个输入波形叠加，而这里的变压器原副边通过电磁感应进行变压外，双绕组变压器还集成一定电感量的电感，与变压器输出并联的电容C形成一个低通滤波器，将变压器输出的高频分量滤除，获得高品质波正弦波。
本发明只用一个直流电源，用二电平控制方法获得五电平信号，无需对三电平的中点平衡做额外处理，或级联式的多电平各组直流电压的平衡做额外处理。
本发明用磁耦合技术，不但可以通过耦合得到多电平信号，还能通过变压器的特点进行电压升降控制，在大范围内适配各种负载。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (3)

1.一种基于H桥交叉载波磁耦合控制的五电平逆变电源，其特征在于，包括1个直流电源、2个H桥逆变器、1个双分励滤波变压器及1个滤波电容C，直流电源作为输入端接2个H桥逆变器，2个H桥之间采取交叉载波模式进行交叠控制，载波之间相位差180度，2个H桥逆变器输出端分别接双分励滤波变压器的两组原边绕组，双分励滤波变压器副边绕组输出五电平PWM，五电平PWM经并联的电容后输出正弦波。
2.根据权利要求1所述基于H桥交叉载波磁耦合控制的五电平逆变电源，其特征在于，所述H桥逆变器输入端采用无中点的直流电供电方式。
3.根据权利要求1或2所述基于H桥交叉载波磁耦合控制的五电平逆变电源，其特征在于，所述双分励滤波变压器作为电感与滤波电容构成低通滤波器，滤除双分励滤波变压器输出的高频分量。
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CN115642783A (zh) * 2022-12-06 2023-01-24 眉山博雅新材料股份有限公司 一种高频电源及用于高频电源的功率器件

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CN115642783A (zh) * 2022-12-06 2023-01-24 眉山博雅新材料股份有限公司 一种高频电源及用于高频电源的功率器件

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