CN108712083A - 一种三开关推挽输入高频链单级逆变电路 - Google Patents

一种三开关推挽输入高频链单级逆变电路 Download PDF

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CN108712083A
CN108712083A CN201810522969.3A CN201810522969A CN108712083A CN 108712083 A CN108712083 A CN 108712083A CN 201810522969 A CN201810522969 A CN 201810522969A CN 108712083 A CN108712083 A CN 108712083A
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钟曙
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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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
    • 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
    • H02M7/538—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 push-pull configuration
    • H02M7/5381—Parallel type
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/81—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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 arranged for operation in parallel

Abstract

本发明提供的一种三开关推挽输入高频链单级逆变电路，包括三开关推挽电路、周波变换电路、钳位电路、第一变压器、第二变压器；所述三开关推挽电路包括电源E、开关管SP1、开关管SP2、开关管SP3；所述开关管SP1、开关管SP3、第一变压器的初级线圈、第二变压器的初级线圈串联成环；所述电源E一端与开关管SP2连接，另一端连接于开关管SP1和开关管SP3之间。该逆变电路将全桥有源钳位应用于变压器副边，实现周波变换器可靠换流、回收滤波电感与漏感的能量并钳位周波变换器开关管两端电压。该电路具有单级功率转换，宽范围软开关，漏感能量回收，低压应力低，输出电压波形质量好的优点。

Description

一种三开关推挽输入高频链单级逆变电路
技术领域
本发明涉及一种三开关推挽输入高频链单级逆变电路，属于电学领域。
背景技术
在高频链单级逆变器(High frequency link single stage inverter,HFL-SSI)原边采用推挽电路时具有高升压比的优点，在低压供电场合具有优势。但是，推挽电路只能产生正负两个电平，相比之下原边采用全桥电路时，能够将单极性移相调制方法应用于原边电路，进而实现宽范围软开关。然而，全桥电路需要使用四个开关管，相比推挽电路多使用了两个开关管。此外，HFL-SSI周波变换器换流死区期间，滤波电感电流与漏感电流的通路被强行阻断，导致周波变换器开关管两端产生非常高的电压尖峰。
发明内容
技术问题：为了解决现有技术的缺陷，本发明提供了一种三开关推挽输入高频链单级逆变电路。
技术方案：本发明提供的一种三开关推挽输入高频链单级逆变电路，包括三开关推挽电路、周波变换电路、有源钳位电路、第一变压器、第二变压器；
所述三开关推挽电路包括电源E、开关管SP1、开关管SP2、开关管SP3；所述开关管SP1、开关管SP3、第一变压器的初级线圈、第二变压器的初级线圈串联成环；所述电源E一端与开关管SP2连接，另一端连接于开关管SP1和开关管SP3之间；开关管SP2另一端连接于第一变压器的初级线圈和第二变压器的初级线圈之间；
所述有源钳位电路包括开关管SC1、开关管SC2、开关管SC3、开关管SC4、二极管D1、二极管D2、电容C1、电容C2；所述开关管SC1的源极和开关管SC2的漏极连接；所述开关管SC3的源极和开关管SC4的漏极连接；电容C1的电容C2连接；所述开关管SC1的漏极、开关管SC3的漏极、二极管D1的阴极和电容C1连接；所述开关管SC2的源极、开关管SC4的源极、二极管D2的阳极和电容C2连接；二级管D1的阳极、二极管D2的阴极连接；
所述半桥逆变电路、周波变换器、有源钳位电路通过变压器连接；
所述周波变换器电路包括开关管S1、开关管S2、开关管S3、开关管S4；所述开关管S1的源极和开关管S2的源极连接形成双向开关管S1-S2；所述开关管S3的源极和开关管S4的源极连接形成双向开关管S3-S4；
所述变压器包括两个初级线圈、两个次级线圈；一个初级线圈一端连接于开关管SP1的源极和开关管SP2的漏极之间，另一端连接于电容CP1和电容CP2之间；第一变压器的次级线圈、双向开关管S1-S2、双向开关管S3-S4、第二变压器的次级线圈依次连接成环；开关管S2的漏极与开关管S4的漏极连接，并与滤波电感Lf的一端连接；滤波电感Lf的另外一端与滤波电容Cf和负载电阻R所形成的并联电路连接；滤波电容Cf和负载R所形成的并联电路另外一端与参考地连接；
第一变压器的次级线圈和开关管S1的漏极之间与开关管SC1的源极和开关管SC2的漏极之间连接，第二变压器的次级线圈和开关管S3的漏极之间与开关管SC3的源极和开关管SC4的漏极之间连接，二极管D1的阳极和二极管D2的阴极之间与开关管S2的漏极和开关管S4的漏极之间连接。
有益效果：本发明提供的逆变电路将全桥有源钳位(Full bridge active clamp,FBAC)应用于变压器副边，实现周波变换器可靠换流、回收滤波电感与漏感的能量并钳位周波变换器开关管两端电压。该电路具有单级功率转换，宽范围软开关，漏感能量回收，低压应力低，输出电压波形质量好的优点。
附图说明
图1为三开关推挽输入高频链单级逆变电路图。
图2为调制时序图。
图3为变压器次级电压VEF实验波形和输出电压vo实验波形。
由图3可知，变压器副边电压VEF为单极性三电平波形，原边采用三开关推挽电路，实现了单极性调制功能。此外，变压器副边电压VEF获得了很好的钳位，且输出电压vo波形质量很好。
图4为周波变换器开关管S1的开关波形。由图4可知，开关管S1实现了零电压软开关。
图5为周波变换器开关管S2的开关波形。由图5可知，开关管S2实现了零电压软开关。
具体实施方式
下面对本发明三开关推挽输入高频链单级逆变电路作出进一步说明。
三开关推挽输入高频链单级逆变电路，见图1，包括三开关推挽电路、周波变换电路、有源钳位电路、第一变压器、第二变压器；
所述三开关推挽电路包括电源E、开关管SP1、开关管SP2、开关管SP3；所述开关管SP1、开关管SP3、第一变压器的初级线圈、第二变压器的初级线圈串联成环；所述电源E一端与开关管SP2连接，另一端连接于开关管SP1和开关管SP3之间；开关管SP2另一端连接于第一变压器的初级线圈和第二变压器的初级线圈之间；
所述有源钳位电路包括开关管SC1、开关管SC2、开关管SC3、开关管SC4、二极管D1、二极管D2、电容C1、电容C2；所述开关管SC1的源极和开关管SC2的漏极连接；所述开关管SC3的源极和开关管SC4的漏极连接；电容C1的电容C2连接；所述开关管SC1的漏极、开关管SC3的漏极、二极管D1的阴极和电容C1连接；所述开关管SC2的源极、开关管SC4的源极、二极管D2的阳极和电容C2连接；二级管D1的阳极、二极管D2的阴极连接；
所述半桥逆变电路、周波变换器、有源钳位电路通过变压器连接；
所述周波变换器电路包括开关管S1、开关管S2、开关管S3、开关管S4；所述开关管S1的源极和开关管S2的源极连接形成双向开关管S1-S2；所述开关管S3的源极和开关管S4的源极连接形成双向开关管S3-S4；
所述变压器包括两个初级线圈、两个次级线圈；一个初级线圈一端连接于开关管SP1的源极和开关管SP2的漏极之间，另一端连接于电容CP1和电容CP2之间；第一变压器的次级线圈、双向开关管S1-S2、双向开关管S3-S4、第二变压器的次级线圈依次连接成环；开关管S2的漏极与开关管S4的漏极连接，并与滤波电感Lf的一端连接；滤波电感Lf的另外一端与滤波电容Cf和负载电阻R所形成的并联电路连接；滤波电容Cf和负载R所形成的并联电路另外一端与参考地连接；
第一变压器的次级线圈和开关管S1的漏极之间与开关管SC1的源极和开关管SC2的漏极之间连接，第二变压器的次级线圈和开关管S3的漏极之间与开关管SC3的源极和开关管SC4的漏极之间连接，二极管D1的阳极和二极管D2的阴极之间与开关管S2的漏极和开关管S4的漏极之间连接。
该电路的工作原理，见图2：
开关管SP1、SP2与SP3构成三开关推挽电路，周波变换器由双向开关管S1-S2与S3-S4构成，钳位电路由开关管SC1～SC4、钳位电容C1～C2与二极管D1～D2构成。高频变压器T原边与副边均为双绕组，E为直流输入电压，vo为输出电压。Lf与Cf构成低通滤波器，R为负载电阻。原边开关管SP2断开期间，变压器副边电压VGH为零，此时双向开关管S1-S2与S3-S4可以交叠导通实现零电压开关。
在周波变换器死区时间内，二极管D1与D2分别在滤波电感电流iL为负与为正时为其提供续流通路。而漏感电流iLk1和iLk2则分别通过开关管SC1～SC2与SC3～SC4在周波变换器死区时间内实现续流。FBAC电路实同时现了滤波电感能量与漏感能量回收，提升了系统效率。钳位开关管SC1～SC4与原边开关管SP1～SP2同步工作，实现双向能量流动，保持钳位电容电压稳定。钳位电容回收的能量在钳位开关管导通期间能够迅速传递到直流电源端或者负载端。此外，FBAC消除了周波变换器两端的电压尖峰，降低双向开关管电压应力，并降低了输出电压失真。周波变换器两端电压均实现了钳位，这同时也为周波变换器开关管实现ZVS创造了条件。

Claims (1)

1.一种三开关推挽输入高频链单级逆变电路，其特征在于：包括三开关推挽电路、周波变换电路、有源钳位电路、第一变压器、第二变压器；
所述三开关推挽电路包括电源E、开关管SP1、开关管SP2、开关管SP3；所述开关管SP1、开关管SP3、第一变压器的初级线圈、第二变压器的初级线圈串联成环；所述电源E一端与开关管SP2连接，另一端连接于开关管SP1和开关管SP3之间；开关管SP2另一端连接于第一变压器的初级线圈和第二变压器的初级线圈之间；
所述有源钳位电路包括开关管SC1、开关管SC2、开关管SC3、开关管SC4、二极管D1、二极管D2、电容C1、电容C2；所述开关管SC1的源极和开关管SC2的漏极连接；所述开关管SC3的源极和开关管SC4的漏极连接；电容C1的电容C2连接；所述开关管SC1的漏极、开关管SC3的漏极、二极管D1的阴极和电容C1连接；所述开关管SC2的源极、开关管SC4的源极、二极管D2的阳极和电容C2连接；二级管D1的阳极、二极管D2的阴极连接；
所述半桥逆变电路、周波变换器、有源钳位电路通过变压器连接；
所述周波变换器电路包括开关管S1、开关管S2、开关管S3、开关管S4；所述开关管S1的源极和开关管S2的源极连接形成双向开关管S1-S2；所述开关管S3的源极和开关管S4的源极连接形成双向开关管S3-S4；
所述变压器包括两个初级线圈、两个次级线圈；一个初级线圈一端连接于开关管SP1的源极和开关管SP2的漏极之间，另一端连接于电容CP1和电容CP2之间；第一变压器的次级线圈、双向开关管S1-S2、双向开关管S3-S4、第二变压器的次级线圈依次连接成环；开关管S2的漏极与开关管S4的漏极连接，并与滤波电感Lf的一端连接；滤波电感Lf的另外一端与滤波电容Cf和负载电阻R所形成的并联电路连接；滤波电容Cf和负载R所形成的并联电路另外一端与参考地连接；
第一变压器的次级线圈和开关管S1的漏极之间与开关管SC1的源极和开关管SC2的漏极之间连接，第二变压器的次级线圈和开关管S3的漏极之间与开关管SC3的源极和开关管SC4的漏极之间连接，二极管D1的阳极和二极管D2的阴极之间与开关管S2的漏极和开关管S4的漏极之间连接。
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