CN105515559A - Voltage switching circuit applied to PSE switch - Google Patents

Voltage switching circuit applied to PSE switch Download PDF

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CN105515559A
CN105515559A CN201610053646.5A CN201610053646A CN105515559A CN 105515559 A CN105515559 A CN 105515559A CN 201610053646 A CN201610053646 A CN 201610053646A CN 105515559 A CN105515559 A CN 105515559A
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triode
module
voltage
power
switch control
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CN105515559B (en
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孙翀
王民利
张涛
范淑一
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Shenzhen Gongjin Electronics Co Ltd
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Shenzhen Gongjin Electronics Co Ltd
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention discloses a voltage switching circuit applied to a PSE switch. The voltage switching circuit comprises a power module, a first switch control module, a power-over-Ethernet (poe) module, a voltage stabilizing module, a second switch control module, a 48 V-to-12 V power switching module and a Main Board signal main board. By means of the voltage switching circuit applied to the PSE switch, power supply modes are automatically switched according to input of different power adapters on the basis that the specific performance of products is not affected, so that the compatibility and practicability of the switch are improved, the power loss of the switch is reduced, and thus the switch can be applied more widely. The voltage switching circuit applied to the PSE switch is widely suitable for the poe technical field.

Description

一种应用于PSE交换机的电压切换电路A voltage switching circuit applied to PSE switch

技术领域 technical field

本发明涉及以太网供电poe技术领域，尤其涉及一种应用于PSE交换机的电压切换电路。 The invention relates to the technical field of power over Ethernet poe, in particular to a voltage switching circuit applied to a PSE switch.

背景技术 Background technique

POE也被称为基于局域网的供电系统(POL,PoweroverLAN)或有源以太网(ActiveEthernet)，有时也被简称为以太网供电，这是利用现存标准以太网传输电缆的同时传送数据和电功率的最新标准规范，并保持了与现存以太网系统和用户的兼容性。PSE(PowerSourcingEquipment)指的是为以太网客户端设备供电的设备。IEEE802.3af标准是基于以太网供电系统POE的新标准，它在IEEE802.3的基础上增加了通过网线直接供电的相关标准，是现有以太网标准的扩展，也是第一个关于电源分配的国际标准。 POE is also known as local area network-based power supply system (POL, PoweroverLAN) or active Ethernet (ActiveEthernet), sometimes referred to as Ethernet power supply, which is the latest technology to transmit data and electrical power while using existing standard Ethernet transmission cables. Standard specifications, and maintain compatibility with existing Ethernet systems and users. PSE (PowerSourcingEquipment) refers to a device that supplies power to Ethernet client devices. The IEEE802.3af standard is a new standard based on the Ethernet power supply system POE. It adds relevant standards for direct power supply through network cables on the basis of IEEE802.3. It is an extension of the existing Ethernet standard and the first one about power distribution. international standard.

通信行业发展越来越快，一些小型PSE交换机采用外部48V电源适配器接入，通过内部电路供给以太网口48V供电功能。但有时候只是需要作为一个单纯的交换机来工作，一般交换机的电源适配器都是12V。如果将PSE交换机作为普通交换机去使用，有可能引起普通接入设备的异常，而且功率也有浪费。 The communication industry is developing faster and faster. Some small PSE switches are connected with an external 48V power adapter, and the Ethernet port is supplied with 48V power supply function through the internal circuit. But sometimes it just needs to work as a simple switch. Generally, the power adapter of the switch is 12V. If the PSE switch is used as an ordinary switch, it may cause abnormality of the ordinary access equipment, and the power will be wasted.

发明内容 Contents of the invention

为了解决上述技术问题，本发明的目的是提供一种提高交换机的兼容性、实用性，降低交换机功率损耗的应用于PSE交换机的电压切换电路。 In order to solve the above-mentioned technical problems, the object of the present invention is to provide a voltage switching circuit applied to a PSE switch which improves the compatibility and practicability of the switch and reduces the power loss of the switch.

本发明所采用的技术方案是：一种应用于PSE交换机的电压切换电路，其包括电源模块、第一开关控制模块、poe以太网供电模块、稳压模块、第二开关控制模块、48V转12V电源转换模块以及MainBroad信号主板；所述电源模块通过第一开关控制模块与poe以太网供电模块连接；所述电源模块与第二开关控制模块连接，所述第二开关控制模块与48V转12V电源转换模块连接，所述48V转12V电源转换模块与MainBroad信号主板连接，所述第二开关控制模块与MainBroad信号主板连接；所述第一开关控制模块与第二开关控制模块连接，所述稳压模块与第二开关控制模块连接，所述电源模块与稳压模块连接。 The technical solution adopted in the present invention is: a voltage switching circuit applied to a PSE switch, which includes a power supply module, a first switch control module, a poe Ethernet power supply module, a voltage stabilizing module, a second switch control module, and a 48V to 12V Power conversion module and MainBroad signal motherboard; the power module is connected to the poe Ethernet power supply module through the first switch control module; the power module is connected to the second switch control module, and the second switch control module is connected to the 48V to 12V power supply The conversion module is connected, the 48V to 12V power conversion module is connected to the MainBroad signal main board, the second switch control module is connected to the MainBroad signal main board; the first switch control module is connected to the second switch control module, and the voltage stabilizing The module is connected with the second switch control module, and the power supply module is connected with the voltage stabilizing module.

进一步，所述第一开关控制模块包括第一限流电阻、第一稳压管、第一MOS管以及第二稳压管，所述电源模块的正输出端通过第一电阻与第一稳压管的负极端连接，所述第一稳压管的的正极端与第一MOS管的栅极连接，所述第一MOS管的源极与poe以太网供电模块连接，所述第一MOS管的漏极与电源模块的负输出端连接，所述第二稳压管的正极端与电源模块的负输出端连接，所述第二稳压管的负极端与第一稳压管的正极端连接。 Further, the first switch control module includes a first current-limiting resistor, a first voltage regulator transistor, a first MOS transistor, and a second voltage regulator transistor, and the positive output terminal of the power module communicates with the first voltage regulator through the first resistor. The negative end of the tube is connected, the positive end of the first regulator tube is connected to the gate of the first MOS tube, the source of the first MOS tube is connected to the poe Ethernet power supply module, and the first MOS tube The drain of the second voltage regulator tube is connected to the negative output terminal of the power module, the positive terminal of the second voltage regulator tube is connected to the negative output terminal of the power supply module, the negative terminal of the second voltage regulator tube is connected to the positive terminal of the first voltage regulator tube connect.

进一步，所述的第一MOS管为N沟道MOS管。 Further, the first MOS transistor is an N-channel MOS transistor.

进一步，所述的第二开关控制模块包括：第三三极管、第四三极管和继电器，所述第三三极管的基极与第一稳压管的正极端连接，所述第三三极管的发射极与电源模块的负输出端连接，所述第三三极管的集电极与第四三极管的基极连接，所述第四三极管的集电极与电源模块的正输出端连接，所述第四三极管的发射极与继电器连接。 Further, the second switch control module includes: a third triode, a fourth triode and a relay, the base of the third triode is connected to the positive terminal of the first regulator tube, and the first The emitter of the three triodes is connected to the negative output terminal of the power module, the collector of the third triode is connected to the base of the fourth triode, and the collector of the fourth triode is connected to the power module The positive output terminal of the fourth triode is connected to the emitter of the relay.

进一步，所述稳压模块包括第三限流电阻、第四限流电阻、第一三极管、第二三极管以及稳压三极管，所述第一三极管的基极和第二三极管的集电极连接、所述第一三极管的发射极和第二三极管的基极连接，所述第一三极管的集电极与电源模块的正输出端，所述电源模块的正输入端通过第三限流电阻与第一三极管的基极连接，所述第二三极管的发射极与基极之间通过第四限流电阻连接，所述第二三极管的发射极与稳压三极管的负极端连接，所述稳压三极管的正极端与电源模块的负输出端连接，所述稳压三极管的参考极与继电器连接。 Further, the voltage stabilizing module includes a third current limiting resistor, a fourth current limiting resistor, a first triode, a second triode and a voltage stabilizing transistor, the base of the first triode and the second three The collector of the transistor is connected, the emitter of the first triode is connected with the base of the second triode, the collector of the first triode is connected to the positive output terminal of the power module, and the power module The positive input terminal of the first triode is connected to the base of the first triode through the third current limiting resistor, the emitter of the second triode is connected to the base through the fourth current limiting resistor, and the second triode The emitter of the tube is connected to the negative terminal of the voltage stabilizing triode, the positive terminal of the voltage stabilizing triode is connected to the negative output terminal of the power module, and the reference pole of the voltage stabilizing triode is connected to the relay.

进一步，所述稳压模块还包括第三稳压管，所述第三稳压管的负极端与稳压三极管的参考极连接，所述第三稳压管的正极端与稳压三极管的正极端连接。 Further, the voltage stabilizing module also includes a third voltage stabilizing tube, the negative end of the third voltage stabilizing tube is connected to the reference electrode of the voltage stabilizing transistor, the positive end of the third voltage stabilizing tube is connected to the positive terminal of the voltage stabilizing triode Extreme connection.

进一步，所述的稳压管三极管的型号为TL431。 Further, the model of the voltage regulator transistor is TL431.

本发明的有益效果是：本发明设有第一开关控制模块、第二开关控制模块和48V转12V电源转换模块，当48V电源接入，电源提供给poe以太网供电模块，提供给以太网POE设备供电；另外48V电源通过48V转12V电源转换模块转12V提供给MainBroad信号主板供电。当12V电源接入，电源不为poe以太网供电模块供电，另外电源直接为MainBroad信号主板供电。本发明根据不同电源适配器输入，自动切换供电模式，提高了交换机的兼容性、实用性，降低交换机功率损耗，使得其应用更广泛。 The beneficial effects of the present invention are: the present invention is provided with a first switch control module, a second switch control module and a 48V to 12V power conversion module. When the 48V power supply is connected, the power supply is provided to the poe Ethernet power supply module and to the Ethernet POE The equipment is powered; in addition, the 48V power supply is converted to 12V through the 48V to 12V power conversion module to provide power to the MainBroad signal motherboard. When the 12V power supply is connected, the power supply does not supply power to the poe Ethernet power supply module, and the other power supply directly supplies power to the MainBroad signal motherboard. The invention automatically switches the power supply mode according to the input of different power adapters, improves the compatibility and practicability of the switch, reduces the power loss of the switch, and makes it more widely used.

附图说明 Description of drawings

下面结合附图对本发明的具体实施方式作进一步说明： The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

图1是本发明的功能模块示意图； Fig. 1 is a schematic diagram of functional modules of the present invention;

图2是本发明的电路原理图。 Fig. 2 is a schematic circuit diagram of the present invention.

具体实施方式 detailed description

需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。 It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

如图1至图2所示，一种应用于PSE交换机的电压切换电路，其包括电源模块、第一开关控制模块、poe以太网供电模块、稳压模块、第二开关控制模块、48V转12V电源转换模块以及MainBroad信号主板；所述电源模块通过第一开关控制模块与poe以太网供电模块连接；所述电源模块与第二开关控制模块连接，所述第二开关控制模块与48V转12V电源转换模块连接，所述48V转12V电源转换模块与MainBroad信号主板连接，所述第二开关控制模块与MainBroad信号主板连接；所述第一开关控制模块与第二开关控制模块连接，所述稳压模块与第二开关控制模块连接，所述电源模块与稳压模块连接。 As shown in Figures 1 to 2, a voltage switching circuit applied to a PSE switch includes a power supply module, a first switch control module, a poe Ethernet power supply module, a voltage stabilization module, a second switch control module, and a 48V to 12V Power conversion module and MainBroad signal motherboard; the power module is connected to the poe Ethernet power supply module through the first switch control module; the power module is connected to the second switch control module, and the second switch control module is connected to the 48V to 12V power supply The conversion module is connected, the 48V to 12V power conversion module is connected to the MainBroad signal main board, the second switch control module is connected to the MainBroad signal main board; the first switch control module is connected to the second switch control module, and the voltage stabilizing The module is connected with the second switch control module, and the power supply module is connected with the voltage stabilizing module.

其工作原理为：所述电源模块为整个电路供电，当48V电源接入，电源提供给poe以太网供电模块，提供给以太网POE设备供电；另外48V电源通过48V转12V电源转换模块转12V提供给MainBroad信号主板供电。当12V电源接入，电源不为poe以太网供电模块供电，另外电源直接为MainBroad信号主板供电。所述第一开关控制模块用于控制电源是否为poe以太网供电模块供电，所述第一开关控制模块用于控制电源是否通过48V转12V电源转换模块为MainBroad信号主板供电。所述稳压模块用于使第二开关控制模块的在稳定的电压下工作。 Its working principle is: the power supply module supplies power for the entire circuit. When the 48V power supply is connected, the power supply is provided to the poe Ethernet power supply module, which supplies power to the Ethernet POE equipment; in addition, the 48V power supply is provided through the 48V to 12V power conversion module to 12V. Power the MainBroad signal board. When the 12V power supply is connected, the power supply does not supply power to the poe Ethernet power supply module, and the other power supply directly supplies power to the MainBroad signal motherboard. The first switch control module is used to control whether the power supply supplies power to the poe Ethernet power supply module, and the first switch control module is used to control whether the power supply supplies power to the MainBroad signal motherboard through the 48V to 12V power conversion module. The voltage stabilizing module is used to make the second switch control module work under a stable voltage.

进一步作为优选的实施方式，所述第一开关控制模块包括第一限流电阻R1、第一稳压管ZD1、第一MOS管M1以及第二稳压管ZD2，所述电源模块的正输出端通过第一限流电阻R1与第一稳压管ZD1的负极端连接，所述第一稳压管ZD1的正极端与第一MOS管M1的栅极连接，所述第一MOS管M1的源极与poe以太网供电模块连接，所述第一MOS管M1的漏极与电源模块的负输出端连接，所述第二稳压管ZD2的正极端与电源模块的负输出端连接，所述第二稳压管ZD2的负极端与第一稳压管ZD1的正极端连接。 As a further preferred embodiment, the first switch control module includes a first current limiting resistor R1, a first voltage regulator transistor ZD1, a first MOS transistor M1, and a second voltage regulator transistor ZD2, and the positive output terminal of the power module The first current limiting resistor R1 is connected to the negative terminal of the first voltage regulator transistor ZD1, the positive terminal of the first voltage regulator transistor ZD1 is connected to the gate of the first MOS transistor M1, and the source of the first MOS transistor M1 The pole is connected to the poe Ethernet power supply module, the drain of the first MOS transistor M1 is connected to the negative output terminal of the power module, the positive terminal of the second regulator tube ZD2 is connected to the negative output terminal of the power module, and the The negative terminal of the second voltage regulator transistor ZD2 is connected to the positive terminal of the first voltage regulator transistor ZD1.

进一步作为优选的实施方式，所述的第二开关控制模块包括：第三三极管Q3、第四三极管Q4和继电器K1，所述第三三极管Q3的基极与第一稳压管ZD1的正极端连接，所述第三三极管Q3的发射极与电源模块的负输出端连接，所述第三三极管Q3的集电极与第四三极管Q4的基极连接，所述第四三极管Q4的集电极与电源模块的正输出端连接，所述第四三极管Q4的发射极与继电器K1连接。 As a further preferred embodiment, the second switch control module includes: a third triode Q3, a fourth triode Q4 and a relay K1, the base of the third triode Q3 is connected to the first regulator The positive end of the transistor ZD1 is connected, the emitter of the third transistor Q3 is connected to the negative output terminal of the power module, the collector of the third transistor Q3 is connected to the base of the fourth transistor Q4, The collector of the fourth triode Q4 is connected to the positive output terminal of the power module, and the emitter of the fourth triode Q4 is connected to the relay K1.

进一步作为优选的实施方式，所述稳压模块包括第三限流电阻R3、第四限流电阻R4、第一三极管Q1、第二三极管Q2以及稳压三极管U1，所述第一三极管Q1的基极和第二三极管Q2的集电极连接、所述第一三极管Q1的发射极和第二三极管Q2的基极连接，所述第一三极管Q1的集电极与电源模块的正输出端，所述电源模块的正输入端通过第三限流电阻R3与第一三极管Q1的基极连接，所述第二三极管Q2的发射极与基极之间通过第四限流电阻R4连接，所述第二三极管Q2的发射极与稳压三极管U1的负极端连接，所述稳压三极管U1的正极端与电源模块的负输出端连接，所述稳压三极管U1的参考极与继电器T1连接。 As a further preferred embodiment, the voltage stabilizing module includes a third current limiting resistor R3, a fourth current limiting resistor R4, a first triode Q1, a second triode Q2 and a voltage stabilizing transistor U1, the first The base of the transistor Q1 is connected to the collector of the second transistor Q2, the emitter of the first transistor Q1 is connected to the base of the second transistor Q2, and the first transistor Q1 The collector of the power module is connected to the positive output terminal of the power module, the positive input terminal of the power module is connected to the base of the first transistor Q1 through the third current limiting resistor R3, and the emitter of the second transistor Q2 is connected to the The bases are connected through the fourth current limiting resistor R4, the emitter of the second transistor Q2 is connected to the negative terminal of the voltage stabilizing transistor U1, and the positive terminal of the voltage stabilizing transistor U1 is connected to the negative output terminal of the power module connected, and the reference pole of the regulator transistor U1 is connected to the relay T1.

进一步作为优选的实施方式，所述稳压模块还包括第三稳压管ZD3，所述第三稳压管ZD3的负极端与稳压三极管U1的参考极连接，所述第三稳压管ZD3的正极端与稳压三极管U1的正极端连接。第三稳压三极管ZD3用于防止过冲电压。 As a further preferred embodiment, the voltage stabilizing module further includes a third voltage stabilizing tube ZD3, the negative end of the third voltage stabilizing tube ZD3 is connected to the reference pole of the voltage stabilizing transistor U1, and the third voltage stabilizing tube ZD3 The positive end of the voltage regulator transistor U1 is connected to the positive end. The third Zener transistor ZD3 is used to prevent overshoot voltage.

进一步作为优选的实施方式，所述的稳压管三极管（U1）的型号为TL431。 As a further preferred implementation manner, the model of the regulator transistor (U1) is TL431.

进一步作为优选的实施方式，所述的第一MOS管（M1）为N沟道MOS管。 As a further preferred implementation manner, the first MOS transistor ( M1 ) is an N-channel MOS transistor.

本发明整个电路的工作原理为：当电源模块为48V供电时，第一稳压管ZD1导通，第一MOS管M1导通，POE以太网供电连接端与地导通，POE以太网供电功能正常；另第三三极管Q3导通，第四三极管Q4关闭，继电器K1关闭，默认连接到48V转12V电源转换模块，给MainBroad信号主板供电。此时整个系统作为PSE交换机工作。当电源模块为12V供电时，第一稳压管ZD1不导通，第一MOS管M1关闭，POE以太网供电连接端连接地断开，POE以太网供电连接端功能关闭；另外第三三极管Q3不导通，第四三极管Q4导通，第一三极管Q1、第二三极管Q2推挽结构能加强反馈，使稳压三极管U1稳定低压继电器工作电压，第三稳压管ZD3防止过冲电压，K1继电器工作切换电路，供电直接连接主信号板供电，此时整个系统关闭了POE功能作为普通交换机工作。 The working principle of the entire circuit of the present invention is as follows: when the power supply module is powered by 48V, the first voltage regulator tube ZD1 is turned on, the first MOS tube M1 is turned on, the POE power over Ethernet connection terminal is connected to the ground, and the POE power over Ethernet function Normal; the third transistor Q3 is turned on, the fourth transistor Q4 is turned off, and the relay K1 is turned off. It is connected to the 48V to 12V power conversion module by default to supply power to the MainBroad signal board. At this point the whole system works as a PSE switch. When the power module is powered by 12V, the first voltage regulator tube ZD1 is not conducting, the first MOS tube M1 is turned off, the connection of the POE power over Ethernet connection is disconnected, and the function of the POE power over Ethernet connection is turned off; in addition, the third three-pole The tube Q3 is not conducting, the fourth triode Q4 is conducting, the push-pull structure of the first triode Q1 and the second triode Q2 can strengthen the feedback, so that the regulator transistor U1 stabilizes the working voltage of the low-voltage relay, and the third regulator The tube ZD3 prevents the overshoot voltage, the K1 relay works to switch the circuit, and the power supply is directly connected to the main signal board for power supply. At this time, the entire system turns off the POE function and works as an ordinary switch.

以上是对本发明的较佳实施进行了具体说明，但本发明创造并不限于所述实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可做作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。 The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention. , these equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (7)

1. be applied to a voltage commutation circuit for PSE switch, it is characterized in that: it comprises power module, the first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power transfer module and MainBroad signal mainboard;
Described power module is by the first switch control module and poe Power over Ethernet model calling;
Described power module is connected with second switch control module, described second switch control module and 48V turn 12V power transfer module and are connected, described 48V turns 12V power transfer module and is connected with MainBroad signal mainboard, and described second switch control module is connected with MainBroad signal mainboard;
Described first switch control module is connected with second switch control module, and described Voltage stabilizing module is connected with second switch control module, and described power module is connected with Voltage stabilizing module.
2. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described first switch control module comprises the first current-limiting resistance, first voltage-stabiliser tube, first metal-oxide-semiconductor and the second voltage-stabiliser tube, the positive output end of described power module is connected with the negative pole end of the first voltage-stabiliser tube by the first resistance, described first voltage-stabiliser tube positive terminal be connected with the grid of the first metal-oxide-semiconductor, the source electrode of described first metal-oxide-semiconductor and poe Power over Ethernet model calling, the described drain electrode of the first metal-oxide-semiconductor is connected with the negative output terminal of power module, the described positive terminal of the second voltage-stabiliser tube is connected with the negative output terminal of power module, the negative pole end of described second voltage-stabiliser tube and the positive terminal of the first voltage-stabiliser tube connect
Connect.
3. the voltage commutation circuit being applied to PSE switch according to claim 2, is characterized in that: the first described metal-oxide-semiconductor is N-channel MOS pipe.
4. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described second switch control module comprises: the 3rd triode, the 4th triode and relay, the base stage of described 3rd triode is connected with the positive terminal of the first voltage-stabiliser tube, the emitter of described 3rd triode is connected with the negative output terminal of power module, the collector electrode of described 3rd triode is connected with the base stage of the 4th triode, the collector electrode of described 4th triode is connected with the positive output end of power module, and the emitter of described 4th triode is connected with relay.
5. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described Voltage stabilizing module comprises the 3rd current-limiting resistance, 4th current-limiting resistance, first triode, second triode and voltage stabilizing triode, the base stage of described first triode is connected with the collector electrode of the second triode, the emitter of described first triode is connected with the base stage of the second triode, the described collector electrode of the first triode and the positive output end of power module, the positive input terminal of described power module is connected with the base stage of the first triode by the 3rd current-limiting resistance, the emitter of described second triode is connected by the 4th current-limiting resistance with between base stage, the emitter of described second triode is connected with the negative pole end of voltage stabilizing triode, the described positive terminal of voltage stabilizing triode is connected with the negative output terminal of power module, the reference pole of described voltage stabilizing triode is connected with relay.
6. the voltage commutation circuit being applied to PSE switch according to claim 5, it is characterized in that: described Voltage stabilizing module also comprises the 3rd voltage-stabiliser tube, the described negative pole end of the 3rd voltage-stabiliser tube is connected with the reference pole of voltage stabilizing triode, and the positive terminal of described 3rd voltage-stabiliser tube is connected with the positive terminal of voltage stabilizing triode.
7. the voltage commutation circuit being applied to PSE switch according to any one of claim 5 to 6, is characterized in that: the model of described voltage-stabiliser tube triode is TL431.
CN201610053646.5A 2016-01-26 2016-01-26 A kind of voltage commutation circuit applied to PSE interchangers Expired - Fee Related CN105515559B (en)

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CN108632664A (en) * 2017-02-24 2018-10-09 汤姆逊许可公司 Operate the method and corresponding equipment, system, computer-readable program product and computer readable storage medium of equipment
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