CN115459599A - 一种实现多路输出的隔离性dc-dc变换器 - Google Patents
一种实现多路输出的隔离性dc-dc变换器 Download PDFInfo
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- CN115459599A CN115459599A CN202110636630.8A CN202110636630A CN115459599A CN 115459599 A CN115459599 A CN 115459599A CN 202110636630 A CN202110636630 A CN 202110636630A CN 115459599 A CN115459599 A CN 115459599A
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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
- H02M3/33569—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 having several active switching elements
- H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
本发明提出一种实现多路输出的隔离性DC‑DC变换器包括滤波电路、维持电路、辅助供电电路和功率转换电路组成，所述维持电路与所述功率转换电路连接，所述辅助供电电路与所述功率转换电路连接，所述维持电路与所述滤波电路连接，所述维持电路包括掉电检测电路、反馈电路和PWM控制器，所述反馈电路与所述PWM控制器连接，供电电路与PWM控制器连接，所述掉电监测电路与维持电路电连接，具有结构紧凑、外形尺寸小；多路输出隔离型DC/DC变换器，各路输出相互独立；纹波要求低和具备维持功能的优点。
Description
技术领域
本发明涉及变换器技术领域，尤其涉及一种实现多路输出的隔离性DC-DC变换器。
背景技术
目前现用户对组件产品需求越来越多，组件产品多为多路输出产品，结构尺寸紧凑。因此急需一种针对此种要求设计的设计方案。
发明内容
为了解决上述问题，本发明提出一种实现多路输出的隔离性DC-DC变换器。
本发明通过以下技术方案实现的：
本发明提出一种实现多路输出的隔离性DC-DC变换器，所述实现多路输出的隔离性DC-DC变换器包括滤波电路、维持电路、辅助供电电路和功率转换电路组成，所述维持电路与所述功率转换电路连接，所述辅助供电电路与所述功率转换电路连接，所述维持电路与所述滤波电路连接，所述维持电路包括掉电检测电路、反馈电路和PWM控制器，所述反馈电路与所述PWM控制器连接，供电电路与PWM控制器连接，所述掉电监测电路与维持电路电连接。
进一步的，所述功率转换电路包括辅助绕组1、辅助绕组2、同步驱动器1和同步驱动器2，所述辅助绕组1和所述同步驱动器1连接，所述辅助绕组2和所述同步驱动器2连接。
进一步的，所述辅助供电电路与辅助绕组1连接，所述辅助供电电路与辅助绕组2连接。
本发明的有益效果：
本发明提出的实现多路输出的隔离性DC-DC变换器具有以下优点：
1、结构紧凑、外形尺寸小；
2、多路输出隔离型DC/DC变换器，各路输出相互独立；
3、纹波要求低；
4、具备维持功能。
附图说明
图1为本发明的维持电路电路图；
图2为本发明的辅助供电电路电路图；
图3为本发明的功率转换电路电路图；
图4为本发明的三种拓扑电路图；
图5为本发明的滤波电路电路图。
具体实施方式
为了更加清楚完整的说明本发明的技术方案，下面结合附图对本发明作进一步说明。
请参考图1至图5，本发明提出一种实现多路输出的隔离性DC-DC变换器，所述实现多路输出的隔离性DC-DC变换器包括滤波电路、维持电路、辅助供电电路和功率转换电路组成，所述维持电路与所述功率转换电路连接，所述辅助供电电路与所述功率转换电路连接，所述维持电路与所述滤波电路连接，所述维持电路包括掉电检测电路、反馈电路和PWM控制器，所述反馈电路与所述PWM控制器连接，供电电路与PWM控制器连接，所述掉电监测电路与维持电路电连接。
进一步的，所述功率转换电路包括辅助绕组1、辅助绕组2、同步驱动器1和同步驱动器2，所述辅助绕组1和所述同步驱动器1连接，所述辅助绕组2和所述同步驱动器2连接。
进一步的，所述辅助供电电路与辅助绕组1连接，所述辅助供电电路与辅助绕组2连接。
在本实施方式中，二次电源由滤波电路、维持电路、辅助供电电路、功率转换电路组成。：
主功率一级拓扑拟采用反激式拓扑，反激式拓扑器件较少，且利于多路输出设计；反激拓扑采用同步整流方案即原边反馈电路输出整流采用同步整流方式进行整流，这样可以确保在轻载或空载输出情况下PWM控制器仍能维持一定的占空比以确保副边绕组瞬时带载时反馈环路可以快速响应，解决副边空满载切换时电压波动问题，采用反激同步整流方案可实现多路开环绕组输出且每路输出具有较高的电压精度。
主功率二级拓扑拟采用BUCK拓扑，前级反激输出较稳定可实现少器件、高效率；
主功率三级拓扑拟采用LDO拓扑，针对Ⅰ、Ⅵ组模块低纹波要求，采用LDO拓扑可有效降低电路纹波干扰，实现低纹波直流输出；
反激式拓扑、BUCK拓扑、LDO拓扑均采用成熟技术平台，三种拓扑均有成熟方案经充分验证并完成设计定型工作。
维持功能采用维持电源实现，为满足产品尺寸、重量要求，需控制维持电容重量及尺寸，因此采用维持电源设计预先将电容电压充电到较高的电压，以减小电容容量，以便降低维持电容尺寸、重量；
为实现低纹波输出Ⅰ、Ⅵ组模块输出级采用LDO拓扑，同时得到较高效率需将前级电压尽量接近输出电压以实现高效率。因此主功率一级电路使用反激式拓扑分两组产生七路独立绕组为后级BUCK拓扑提供输入，反激拓扑采用原边同步整流，确保反激拓扑在空、满载情况下均维持一定的占空比，保证副边负载切换时输出的稳定。
当然，本发明还可有其它多种实施方式，基于本实施方式，本领域的普通技术人员在没有做出任何创造性劳动的前提下所获得其他实施方式，都属于本发明所保护的范围。
Claims (3)
1.一种实现多路输出的隔离性DC-DC变换器，其特征在于，所述实现多路输出的隔离性DC-DC变换器包括滤波电路、维持电路、辅助供电电路和功率转换电路组成，所述维持电路与所述功率转换电路连接，所述辅助供电电路与所述功率转换电路连接，所述维持电路与所述滤波电路连接，所述维持电路包括掉电检测电路、反馈电路和PWM控制器，所述反馈电路与所述PWM控制器连接，供电电路与PWM控制器连接，所述掉电监测电路与维持电路电连接。
2.根据权利要求1所述的实现多路输出的隔离性DC-DC变换器，其特征在于，所述功率转换电路包括辅助绕组1、辅助绕组2、同步驱动器1和同步驱动器2，所述辅助绕组1和所述同步驱动器1连接，所述辅助绕组2和所述同步驱动器2连接。
3.根据权利要求2所述的实现多路输出的隔离性DC-DC变换器，其特征在于，所述辅助供电电路与辅助绕组1连接，所述辅助供电电路与辅助绕组2连接。
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