CN104467435A - 一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源 - Google Patents

一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源 Download PDF

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CN104467435A
CN104467435A CN201410699600.1A CN201410699600A CN104467435A CN 104467435 A CN104467435 A CN 104467435A CN 201410699600 A CN201410699600 A CN 201410699600A CN 104467435 A CN104467435 A CN 104467435A
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output
electric capacity
resistance
power amplifier
diode
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罗娅
车容俊
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Chengdu Cuopu Technology Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33507Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523Conversion 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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/14Arrangements for reducing ripples from dc input or output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/3353Conversion 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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33569Conversion 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
    • H02M3/33576Conversion 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
    • H02M3/33592Conversion 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

Abstract

本发明公开了一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,主要由二极管整流器U1,三端稳压器W1,三端稳压器W2,变压器T,设置在变压器T原边的原边线圈L1,设置在变压器T副边的副边线圈L2、副边线圈L3及副边线圈L4,串接在二极管整流器U1与三端稳压器W1之间的平衡调制电路,串接在平衡调制电路与原边线圈L1之间的开关滤波电路等组成,其特征在于,在三端稳压器W1的Q端与功率放大器组之间串接有逻辑保护放大电路。本发明的整体电路结构不仅较为简单,而且在结合平衡调制电路后,还能有效的降低电路自身和外接的射频干扰,从而使得制作成本和维护成本有了较大幅度的降低。

Description

一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源
技术领域
本发明涉及一种开关稳压电源,具体是指一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源。
背景技术
随着目前科技的不断进步,电子产品在功能越来越强大的同时也给人们生活上带来了很大的便利。稳压电路便运营而生,传统的串联线性调整型稳压电路具有稳定性高、输出电压可调、波纹系数小、线路简单等特点。然而,这些串联线性调整型稳压电路的调整管总是工作在放大状态,一直都有电流流过,故其管子的功耗较大,电路的效率不高,一般只能达到30%~50%左右。为了克服上述缺陷,人们便研发了开关型稳压电路。
在开关型稳压电路中,调压管工作在开关状态,管子交替工作在饱和与截止两种状态中。当管子饱和导通时,流过管子电流虽大,可是管压降很小;当管子截止时,管压降大,可是流过的电流接近为零。因此,在输出功率相同条件下,开关型稳压电源币串联型稳压电源的效率高,一般可达80%~90%左右。但是,目前人们所采用的开关型稳压电源却存在波纹系数较大,当调整管不断在饱和与截止状态之间切换时,对电路会产生射频干扰,电路比较复杂且成本较高。同时,传统的稳压电源只有一个输出端,即只能有唯一的输出电压值,这就很大程度限制了稳压电源的使用范围。
发明内容
本发明的目的在于克服目前开关型稳压电源存在的波纹系数较大、射频干扰严重、电路复杂、效率不高及输出电压唯一的缺陷,提供一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源。
本发明的目的通过下述技术方案实现:一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,主要由二极管整流器U1,三端稳压器W1,三端稳压器W2,变压器T,设置在变压器T原边的原边线圈L1,设置在变压器T副边的副边线圈L2、副边线圈L3及副边线圈L4,串接在二极管整流器U1与三端稳压器W1之间的平衡调制电路,串接在平衡调制电路与原边线圈L1之间的开关滤波电路,串接在三端稳压器W1与三端稳压器W2之间的功率放大器组,与副边线圈L2相连接的第一输出电路,与副边线圈L3相连接的第二输出电路,以及与副边线圈L4相连接的第三输出电路组成。
同时,在三端稳压器W1的Q端与功率放大器组之间串接有逻辑保护放大电路;所述逻辑保护放大电路主要由功率放大器P3,功率放大器P4,与非门IC1,与非门IC2,负极与功率放大器P3的正极输入端相连接、正极经电阻R10后与与非门IC2的负极输入端相连接的极性电容C11,一端与与非门IC1的负极输入端相连接、另一端与功率放大器P3的正极输入端相连接的电阻R7,串接在功率放大器P3的负极输入端与输出端之间的电阻R8,一端与与非门IC1的输出端相连接、另一端与功率放大器P4的负极输入端相连接的电阻R9,串接在功率放大器P4的正极输入端与输出端之间的极性电容C12,正极与与非门IC2的输出端相连接、负极顺次经稳压二极管D4和电阻R11后与功率放大器P3的输出端相连接的电容C13,P极与功率放大器P4的输出端相连接、N极顺次经电阻R13和电阻R12后与稳压二极管D4和电阻R11的连接点相连接的二极管D5,以及N极与电容C13的负极相连接、P极与二极管D5和电阻R13的连接点相连接的稳压二极管D6组成;所述与非门IC1的正极输入端与功率放大器P3的负极输入端相连接;功率放大器P4的输出端与非门IC2的正极输入端相连接,其正极输入端则与功率放大器P3的输出端相连接;所述极性电容C11的正极与三端稳压器W1的Q端相连接,而电阻R13和电阻R12的连接点则与功率放大器组相连接。
所述平衡调制电路由场效应管MOS1,场效应管MOS2,场效应管MOS3,场效应管MOS4,一端与场效应管MOS1的栅极相连接、另一端经电阻R4后与场效应管MOS2的栅极相连接的电阻R3,以及一端与场效应管MOS3的栅极相连接、另一端经电阻R6后与场效应管MOS4的栅极相连接的电阻R5组成;所述场效应管MOS1的源极与三端稳压器W1的S端相连接,其漏极则与开关滤波电路相连接;所述场效应管MOS2的源极与二极管整流器U1的正极输出端相连接、其漏极与效应管MOS1的漏极相连接;场效应管MOS3的源极与三端稳压器W1的R端相连接,其漏极接地;场效应管MOS4的源极与二极管整流器U的负极输出端相连接,其漏极接地;所述电阻R3与电阻R4的连接点外接+6V电压,电阻R5与电阻R6的连接点也外接+6V电压。
所述的开关滤波电路由三极管Q,电容C1,电阻R1,电阻R2及二极管D1组成;所述三极管Q的基极顺次经电阻R2、二极管D1及电阻R1后与其集电极形成回路,电容C1与电阻R2相并联;三极管Q的集电极与场效应管MOS2的漏极相连接,其发射极接地。
所述的功率放大器组由功率放大器P1和功率放大器P2组成;功率放大器P1和功率放大器P2的正极输入端均与电阻R2与二极管D1的连接点相连接,其负极输入端则均与电阻R12与电阻R13的连接点相连接;功率放大器P1的输出端与三端稳压器W2的Q端相连接,功率放大器P2的输出端则与三端稳压器W2的R端相连接;所述变压器T的原边线圈L1的同名端与电阻R1与二极管D1的连接点相连接、其非同名端则与三端稳压器W2的S端相连接。
所述第一输出电路由二极管D2、电容C2、电容C3及电感L5组成,所述二极管D2的P极与副边线圈L2的同名端相连接、其N极则经电容C2后与副边线圈L2的非同名端相连接;电感L5的一端与二极管D2与电容C2的连接点相连接、另一端则经电容C3后与副边线圈L2的非同名端相连接。
所述第二输出电路由二极管整流器U2、电容C4、电容C5、电容C6、电容C7、集成稳压器W7806和集成稳压器W7809组成;所述二极管整流器U2的输入端与副边线圈L3相并联,电容C4的正极与二极管整流器U2的正极输出端相连接、其负极则与二极管整流器U2的负极输出端相连接;电容C5的正极与电容C4的正极相连接、其负极与电容C6的正极相连接,电容C6的负极则与电容C4的负极相连接;集成稳压器W7806的第一输出端与电容C5的正极相连接、其第二输出端则电容C5的负极相连接;集成稳压器W7809的第一输出端与电容C6的正极相连接、其第二输出端则电容C6的负极相连接,电容C7则串接在集成稳压器W7809的第一输出端与第三输出端之间。
所述第三输出电路由二极管整流器U3、电容C8、电容C9、电容C10、二极管D3及集成稳压器W7809组成;所述二极管整流器U3的输入端与副边线圈L4相并联,电容C8的正极与二极管整流器U3的正极输出端相连接、其负极则与二极管整流器U3的负极输出端相连接;电容C9与电容C8相并联;集成稳压器W7809的第一输出端与电容C9的正极相连接、其第二输出端则与电容C9的负极相连接;电容C10则串接在集成稳压器W7809的第三输出端与第二输出端之间;二极管D3则串接在集成稳压器W7809的第一输出端与第三输出端之间。
本发明较现有技术相比,具有以下优点及有益效果:
(1)本发明的整体电路结构不仅较为简单,而且在结合平衡调制电路后,还能有效的降低电路自身和外接的射频干扰,从而使得制作成本和维护成本有了较大幅度的降低。
(2)本发明具有三组电压输出端,因此能满足人们对电压的正常需求值。
(3)本发明的稳定性和灵敏度较高,能极大程度的降低输出电压的波纹系数。
附图说明
图1为本发明的整体结构示意图。
图2为本发明的逻辑保护放大电路结构示意图。
具体实施方式
下面结合实施例对本发明作进一步地详细说明,但本发明的实施方式不限于此。
实施例
如图1所示,本发明所述的平衡调制式多路输出稳压电源,主要由二极管整流器U1,三端稳压器W1,三端稳压器W2,变压器T,设置在变压器T原边的原边线圈L1,设置在变压器T副边的副边线圈L2、副边线圈L3及副边线圈L4,串接在二极管整流器U1与三端稳压器W1之间的平衡调制电路,串接在平衡调制电路与原边线圈L1之间的开关滤波电路,串接在三端稳压器W1与三端稳压器W2之间的功率放大器组,与副边线圈L2相连接的第一输出电路,与副边线圈L3相连接的第二输出电路,与副边线圈L4相连接的第三输出电路,以及串接在三端稳压器W1与功率放大器组之间的逻辑保护放大电路组成。
所述平衡调制电路由场效应管MOS1,场效应管MOS2,场效应管MOS3,场效应管MOS4,以及电阻R3、电阻R4、电阻R5和电阻R6组成。连接时,电阻R3的一端与场效应管MOS1的栅极相连接、另一端经电阻R4后与场效应管MOS2的栅极相连接,电阻R5的一端与场效应管MOS3的栅极相连接、另一端经电阻R6后与场效应管MOS4的栅极相连接。
同时,场效应管MOS1的源极与三端稳压器W1的S端相连接,其漏极则与开关滤波电路相连接;场效应管MOS2的源极与二极管整流器U1的正极输出端相连接、其漏极与效应管MOS1的漏极相连接;场效应管MOS3的源极与三端稳压器W1的R端相连接,其漏极接地;场效应管MOS4的源极与二极管整流器U的负极输出端相连接,其漏极接地。为了确保能正常的实现平衡调制功能,其中电阻R3与电阻R4的连接点需要外接+6V电压,电阻R5与电阻R6的连接点也需要外接+6V电压。
所述的开关滤波电路则由三极管Q,电容C1,电阻R1,电阻R2及二极管D1组成。连接时,三极管Q的基极顺次经电阻R2、二极管D1及电阻R1后与其集电极形成回路,电容C1与电阻R2相并联;三极管Q的集电极与场效应管MOS2的漏极相连接,其发射极接地。即,三极管Q的集电极同时与场效应管MOS1和场效应管MOS2的漏极相连接。
功率放大器组由功率放大器P1和功率放大器P2组成。如图所示,该功率放大器P1和功率放大器P2的正极输入端均与电阻R2与二极管D1的连接点相连接。同时,功率放大器P1的输出端与三端稳压器W2的Q端相连接,功率放大器P2的输出端则与三端稳压器W2的R端相连接;所述变压器T的原边线圈L1的同名端与电阻R1与二极管D1的连接点相连接、其非同名端则与三端稳压器W2的S端相连接。
所述第一输出电路用于输出+12V的电压,其由二极管D2、电容C2、电容C3及电感L5组成。连接时,二极管D2的P极与副边线圈L2的同名端相连接、其N极则经电容C2后与副边线圈L2的非同名端相连接;电感L5的一端与二极管D2与电容C2的连接点相连接、另一端则经电容C3后与副边线圈L2的非同名端相连接,而电容C3的两端则为输出端。
所述第二输出电路由二极管整流器U2、电容C4、电容C5、电容C6、电容C7、集成稳压器W7806和集成稳压器W7809组成。其中,集成稳压器W7806和集成稳压器W7809均具有三端固定输出特性。本发明充分利用其输出特性与二极管正向压降的特性,使得第二输出电路可以输出-6V和+6V电压。
连接时,二极管整流器U2的输入端与副边线圈L3相并联,电容C4的正极与二极管整流器U2的正极输出端相连接、其负极则与二极管整流器U2的负极输出端相连接;电容C5的正极与电容C4的正极相连接、其负极与电容C6的正极相连接,电容C6的负极则与电容C4的负极相连接;集成稳压器W7806的第一输出端与电容C5的正极相连接、其第二输出端则电容C5的负极相连接;集成稳压器W7809的第一输出端与电容C6的正极相连接、其第二输出端则电容C6的负极相连接,电容C7则串接在集成稳压器W7809的第一输出端与第三输出端之间。
同理,第三输出电路也采用类似的原理,利用集成稳压器W7809的输出特性和二极管的正向压降来实现+9V电压的输出。该第三输出电路由二极管整流器U3、电容C8、电容C9、电容C10、二极管D3及集成稳压器W7809组成;所述二极管整流器U3的输入端与副边线圈L4相并联,电容C8的正极与二极管整流器U3的正极输出端相连接、其负极则与二极管整流器U3的负极输出端相连接;电容C9与电容C8相并联;集成稳压器W7809的第一输出端与电容C9的正极相连接、其第二输出端则与电容C9的负极相连接;电容C10则串接在集成稳压器W7809的第三输出端与第二输出端之间;二极管D3则串接在集成稳压器W7809的第一输出端与第三输出端之间。
所述逻辑保护放大电路的结构如图2所示,即其主要由功率放大器P3,功率放大器P4,与非门IC1,与非门IC2,负极与功率放大器P3的正极输入端相连接、正极经电阻R10后与与非门IC2的负极输入端相连接的极性电容C11,一端与与非门IC1的负极输入端相连接、另一端与功率放大器P3的正极输入端相连接的电阻R7,串接在功率放大器P3的负极输入端与输出端之间的电阻R8,一端与与非门IC1的输出端相连接、另一端与功率放大器P4的负极输入端相连接的电阻R9,串接在功率放大器P4的正极输入端与输出端之间的极性电容C12,正极与与非门IC2的输出端相连接、负极顺次经稳压二极管D4和电阻R11后与功率放大器P3的输出端相连接的电容C13,P极与功率放大器P4的输出端相连接、N极顺次经电阻R13和电阻R12后与稳压二极管D4和电阻R11的连接点相连接的二极管D5,以及N极与电容C13的负极相连接、P极与二极管D5和电阻R13的连接点相连接的稳压二极管D6组成。
同时,所述与非门IC1的正极输入端与功率放大器P3的负极输入端相连接;功率放大器P4的输出端与非门IC2的正极输入端相连接,其正极输入端则与功率放大器P3的输出端相连接。
连接时,所述极性电容C11的正极要与三端稳压器W1的Q端相连接,而电阻R13和电阻R12的连接点则分别与功率放大器P1的负极输入端和功率放大器P2的负极输入端相连接。
如上所述,便可以很好的实现本发明。

Claims (7)

1.一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,主要由二极管整流器U1,三端稳压器W1,三端稳压器W2,变压器T,设置在变压器T原边的原边线圈L1,设置在变压器T副边的副边线圈L2、副边线圈L3及副边线圈L4,串接在二极管整流器U1与三端稳压器W1之间的平衡调制电路,串接在平衡调制电路与原边线圈L1之间的开关滤波电路,串接在三端稳压器W1与三端稳压器W2之间的功率放大器组,与副边线圈L2相连接的第一输出电路,与副边线圈L3相连接的第二输出电路,以及与副边线圈L4相连接的第三输出电路组成,其特征在于,在三端稳压器W1的Q端与功率放大器组之间串接有逻辑保护放大电路;所述逻辑保护放大电路主要由功率放大器P3,功率放大器P4,与非门IC1,与非门IC2,负极与功率放大器P3的正极输入端相连接、正极经电阻R10后与与非门IC2的负极输入端相连接的极性电容C11,一端与与非门IC1的负极输入端相连接、另一端与功率放大器P3的正极输入端相连接的电阻R7,串接在功率放大器P3的负极输入端与输出端之间的电阻R8,一端与与非门IC1的输出端相连接、另一端与功率放大器P4的负极输入端相连接的电阻R9,串接在功率放大器P4的正极输入端与输出端之间的极性电容C12,正极与与非门IC2的输出端相连接、负极顺次经稳压二极管D4和电阻R11后与功率放大器P3的输出端相连接的电容C13,P极与功率放大器P4的输出端相连接、N极顺次经电阻R13和电阻R12后与稳压二极管D4和电阻R11的连接点相连接的二极管D5,以及N极与电容C13的负极相连接、P极与二极管D5和电阻R13的连接点相连接的稳压二极管D6组成;所述与非门IC1的正极输入端与功率放大器P3的负极输入端相连接;功率放大器P4的输出端与非门IC2的正极输入端相连接,其正极输入端则与功率放大器P3的输出端相连接;所述极性电容C11的正极与三端稳压器W1的Q端相连接,而电阻R13和电阻R12的连接点则与功率放大器组相连接。
2.根据权利要求1所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述平衡调制电路由场效应管MOS1,场效应管MOS2,场效应管MOS3,场效应管MOS4,一端与场效应管MOS1的栅极相连接、另一端经电阻R4后与场效应管MOS2的栅极相连接的电阻R3,以及一端与场效应管MOS3的栅极相连接、另一端经电阻R6后与场效应管MOS4的栅极相连接的电阻R5组成;所述场效应管MOS1的源极与三端稳压器W1的S端相连接,其漏极则与开关滤波电路相连接;所述场效应管MOS2的源极与二极管整流器U1的正极输出端相连接、其漏极与效应管MOS1的漏极相连接;场效应管MOS3的源极与三端稳压器W1的R端相连接,其漏极接地;场效应管MOS4的源极与二极管整流器U的负极输出端相连接,其漏极接地;所述电阻R3与电阻R4的连接点外接+6V电压,电阻R5与电阻R6的连接点也外接+6V电压。
3.根据权利要求2所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述的开关滤波电路由三极管Q,电容C1,电阻R1,电阻R2及二极管D1组成;所述三极管Q的基极顺次经电阻R2、二极管D1及电阻R1后与其集电极形成回路,电容C1与电阻R2相并联;三极管Q的集电极与场效应管MOS2的漏极相连接,其发射极接地。
4.根据权利要求3所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述的功率放大器组由功率放大器P1和功率放大器P2组成;功率放大器P1和功率放大器P2的正极输入端均与电阻R2与二极管D1的连接点相连接,其负极输入端则均与电阻R12与电阻R13的连接点相连接;功率放大器P1的输出端与三端稳压器W2的Q端相连接,功率放大器P2的输出端则与三端稳压器W2的R端相连接;所述变压器T的原边线圈L1的同名端与电阻R1与二极管D1的连接点相连接、其非同名端则与三端稳压器W2的S端相连接。
5.根据权利要求4所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述第一输出电路由二极管D2、电容C2、电容C3及电感L5组成,所述二极管D2的P极与副边线圈L2的同名端相连接、其N极则经电容C2后与副边线圈L2的非同名端相连接;电感L5的一端与二极管D2与电容C2的连接点相连接、另一端则经电容C3后与副边线圈L2的非同名端相连接。
6.根据权利要求5所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述第二输出电路由二极管整流器U2、电容C4、电容C5、电容C6、电容C7、集成稳压器W7806和集成稳压器W7809组成;所述二极管整流器U2的输入端与副边线圈L3相并联,电容C4的正极与二极管整流器U2的正极输出端相连接、其负极则与二极管整流器U2的负极输出端相连接;电容C5的正极与电容C4的正极相连接、其负极与电容C6的正极相连接,电容C6的负极则与电容C4的负极相连接;集成稳压器W7806的第一输出端与电容C5的正极相连接、其第二输出端则电容C5的负极相连接;集成稳压器W7809的第一输出端与电容C6的正极相连接、其第二输出端则电容C6的负极相连接,电容C7则串接在集成稳压器W7809的第一输出端与第三输出端之间。
7.根据权利要求6所述的一种基于逻辑保护放大电路的平衡调制式多路输出稳压电源,其特征在于,所述第三输出电路由二极管整流器U3、电容C8、电容C9、电容C10、二极管D3及集成稳压器W7809组成;所述二极管整流器U3的输入端与副边线圈L4相并联,电容C8的正极与二极管整流器U3的正极输出端相连接、其负极则与二极管整流器U3的负极输出端相连接;电容C9与电容C8相并联;集成稳压器W7809的第一输出端与电容C9的正极相连接、其第二输出端则与电容C9的负极相连接;电容C10则串接在集成稳压器W7809的第三输出端与第二输出端之间;二极管D3则串接在集成稳压器W7809的第一输出端与第三输出端之间。
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Application publication date: 20150325