CN204559097U - AC/DC universal device for under-voltage releasing equipment - Google Patents

AC/DC universal device for under-voltage releasing equipment Download PDF

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CN204559097U
CN204559097U CN201520311055.4U CN201520311055U CN204559097U CN 204559097 U CN204559097 U CN 204559097U CN 201520311055 U CN201520311055 U CN 201520311055U CN 204559097 U CN204559097 U CN 204559097U
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coil
module
power supply
switching power
optocoupler
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严洪启
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SUZHOU JINGTAI ELECTRIC CO Ltd
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Abstract

本实用新型公开了一种具有较高的安全性和稳定性交直流通用欠压脱扣器。包括开关电源、线圈、整流模块;还包括:采样模块、通断控制模块,所述开关电源为所述通断控制模块及所述线圈提供稳压电源,所述采样模块包括光耦,所述光耦的输入端与所述整流模块的输出端相连,所述通断控制模块包括MOS管,所述MOS管的源极及漏极与所述开关电源、所述线圈串接,所述MOS管的栅极与所述光耦的输出端相连,当所述采样模块输出的电压值大于设定电压值时,所述MOS管导通,所述开关电源、所述线圈、所述MOS管构成串联回路,所述线圈得电;当所述采样模块输出的电压值小于设定电压值时,所述MOS管截止,所述线圈失电。

The utility model discloses an AC/DC universal undervoltage tripper with high safety and stability. It includes a switching power supply, a coil, and a rectifier module; it also includes: a sampling module and an on-off control module, the switching power supply provides a regulated power supply for the on-off control module and the coil, the sampling module includes an optocoupler, the The input terminal of the optocoupler is connected to the output terminal of the rectifier module, the on-off control module includes a MOS tube, the source and drain of the MOS tube are connected in series with the switching power supply and the coil, and the MOS tube is connected in series with the switching power supply and the coil. The gate of the tube is connected to the output terminal of the optocoupler. When the voltage value output by the sampling module is greater than the set voltage value, the MOS tube is turned on, and the switching power supply, the coil, and the MOS tube A series circuit is formed, and the coil is energized; when the voltage value output by the sampling module is lower than a set voltage value, the MOS transistor is turned off, and the coil is de-energized.

Description

交直流通用欠压脱扣器AC and DC general undervoltage release

技术领域 technical field

本实用新型涉及一种交直流通用欠压脱扣器。The utility model relates to an AC-DC universal undervoltage release.

背景技术 Background technique

欠压脱扣器是断路器的重要元件之一。欠压脱扣器是在它的端电压下降至某一规定范围时,使断路器有延时或无延时断开的一种脱扣器。当电源电压下降,甚至下降到额定工作电压的70%至35%范围内,欠压脱扣器应运作,欠压脱扣器在电源电压等于脱扣器额定工作电压的35%时,欠压脱扣器应能防止断路器合闸,脱扣器线圈失电,线圈内的活动衔铁被释放,使断路器处于脱扣状态。欠压脱扣器的作用是防止下级电器设备在欠压状态下因电流多大而自身发热的有效措施。因此,欠压脱扣器本身应具有很好的安全性及稳定性。现在市场上基本都是交流欠压脱扣器,直流欠压脱扣器比较少,而交流欠压脱扣器的线圈绕线困难。The undervoltage release is one of the important components of the circuit breaker. The undervoltage release is a release that makes the circuit breaker disconnect with or without delay when its terminal voltage drops to a certain range. When the power supply voltage drops, or even drops to the range of 70% to 35% of the rated working voltage, the undervoltage release should operate. When the power supply voltage is equal to 35% of the rated working voltage of the release, the undervoltage release The release should be able to prevent the circuit breaker from closing, the coil of the release is de-energized, the movable armature in the coil is released, and the circuit breaker is in the tripped state. The function of the undervoltage release is an effective measure to prevent the self-heating of the lower-level electrical equipment due to the large current in the undervoltage state. Therefore, the undervoltage release itself should have good safety and stability. At present, there are basically AC undervoltage releases on the market, and there are relatively few DC undervoltage releases, and the coil winding of AC undervoltage releases is difficult.

发明内容 Contents of the invention

针对上述问题,本实用新型的目的是提供一种具有较高的安全性和稳定性的交直流通用欠电压脱扣器。In view of the above problems, the purpose of this utility model is to provide a universal undervoltage release for AC and DC with high safety and stability.

为解决上述技术问题,本实用新型采用如下技术方案:In order to solve the above technical problems, the utility model adopts the following technical solutions:

一种交直流通用欠压脱扣器,包括开关电源、线圈、用于在外网为交流电时将其转换为直流电的整流模块;还包括:用于获取所述整流模块输出电压的采样模块、用于控制所述线圈得电与失电的通断控制模块,所述开关电源为所述通断控制模块及所述线圈提供稳压电源,所述采样模块包括光耦,所述光耦的输入端与所述整流模块的输出端相连,所述通断控制模块包括MOS管,所述MOS管的源极及漏极与所述开关电源、所述线圈串接,所述MOS管的栅极与所述光耦的输出端相连,当所述采样模块输出的电压值大于设定电压值时,所述MOS管导通,所述开关电源、所述线圈、所述MOS管构成串联回路,所述线圈得电;当所述采样模块输出的电压值小于设定电压值时,所述MOS管截止,所述线圈失电。An AC/DC general-purpose undervoltage release, including a switching power supply, a coil, and a rectification module for converting it to DC when the external network is AC; it also includes: a sampling module for obtaining the output voltage of the rectification module, For the on-off control module that controls the power on and off of the coil, the switching power supply provides a stabilized power supply for the on-off control module and the coil, the sampling module includes an optocoupler, and the input of the optocoupler connected to the output terminal of the rectifier module, the on-off control module includes a MOS tube, the source and drain of the MOS tube are connected in series with the switching power supply and the coil, and the gate of the MOS tube Connected to the output terminal of the optocoupler, when the voltage value output by the sampling module is greater than the set voltage value, the MOS transistor is turned on, and the switching power supply, the coil, and the MOS transistor form a series circuit, The coil is energized; when the voltage value output by the sampling module is less than a set voltage value, the MOS transistor is turned off, and the coil is de-energized.

优选地,所述线圈串接在所述开关电源的正极和所述MOS管的漏极之间。Preferably, the coil is connected in series between the anode of the switching power supply and the drain of the MOS transistor.

优选地,所述MOS管的栅极、源极和所述光耦及所述开关电源串接。Preferably, the gate and source of the MOS transistor are connected in series with the optocoupler and the switching power supply.

优选地,该欠压脱扣器包括浪涌吸收及抗干扰模块,所述浪涌吸收及抗干扰模块的输入端与外网相连且输出端与所述整流模块的输入端相连,所述浪涌吸收及抗干扰模块包括相并联的压敏电阻和第一电容。Preferably, the undervoltage release includes a surge absorption and anti-interference module, the input end of the surge absorption and anti-interference module is connected to the external network and the output end is connected to the input end of the rectification module. The surge absorption and anti-interference module includes a piezoresistor and a first capacitor connected in parallel.

更优选地,所述整流模块包括相并联的桥式整流器及第二电容,所述桥式整流器的输入端与所述浪涌吸收及抗干扰模块的输出端相连。More preferably, the rectification module includes a bridge rectifier and a second capacitor connected in parallel, and the input end of the bridge rectifier is connected to the output end of the surge absorption and anti-interference module.

优选地,所述采样模块还包括第二电阻、第一电阻,所述光耦与所述第二电阻并联后串接所述第一电阻及所述整流模块。Preferably, the sampling module further includes a second resistor and a first resistor, and the optocoupler is connected in parallel with the second resistor and then connected in series with the first resistor and the rectifying module.

优选地,所述线圈的电阻值为300~2000Ω。Preferably, the resistance value of the coil is 300-2000Ω.

优选地,所述外网的额定电压为230V以下的交流电压或320V以下的直流电压。Preferably, the rated voltage of the external network is AC voltage below 230V or DC voltage below 320V.

本实用新型采用以上结构,相比现有技术具有如下优点:通过将光耦的输出端与MOS管的栅极相连,并将MOS管的漏极、源极分别与开关电源、线圈相连,光耦控制MOS管的通断来控制线圈的得电与失电,实现衔铁的吸合与释放,安全性和稳定性极大提高。The utility model adopts the above structure, and has the following advantages compared with the prior art: by connecting the output terminal of the optocoupler with the grid of the MOS tube, and connecting the drain and source of the MOS tube with the switching power supply and the coil respectively, the optical The coupling controls the on-off of the MOS tube to control the energization and de-energization of the coil to realize the attraction and release of the armature, which greatly improves the safety and stability.

附图说明 Description of drawings

图1为本实用新型的欠压脱扣器的电路原理示意图。Fig. 1 is a schematic diagram of the circuit principle of the undervoltage release of the present invention.

具体实施方式 Detailed ways

下面结合附图对本实用新型的较佳实施例进行详细阐述,以使本实用新型的优点和特征能更易于被本领域的技术人员理解。The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art.

图1所示为本实用新型的一种交直流通用欠压脱扣器。结合图1所示,它包括浪涌吸收及抗干扰模块、整流模块、采样模块、通断控制模块、开关电源及线圈L。该交直流通用欠压脱扣器用于230V以下的交流电网或320V以下的直流电网中。Fig. 1 shows a general AC and DC undervoltage release of the present invention. As shown in Figure 1, it includes a surge absorption and anti-interference module, a rectification module, a sampling module, an on-off control module, a switching power supply and a coil L. The AC-DC general-purpose undervoltage release is used in AC grids below 230V or DC grids below 320V.

浪涌吸收及抗干扰模块的输入端与外网相连且输出端与整流模块的输入端相连,浪涌吸收及抗干扰模块包括相并联的压敏电阻RV1和第一电容C1,且压敏电阻RV1、第一电容C1分别与外网相并联。The input end of the surge absorption and anti-interference module is connected to the external network and the output end is connected to the input end of the rectification module. The surge absorption and anti-interference module includes a varistor RV1 and a first capacitor C1 connected in parallel, and the varistor RV1 and the first capacitor C1 are respectively connected in parallel with the external network.

整流模块,用于在外网为交流电时将其转换为直流电。整流模块包括相并联的桥式整流器BR1及第二电容C2,桥式整流器BR1的输入端与所述浪涌吸收及抗干扰模块的输出端相连。The rectifier module is used to convert the external network to direct current when the external network is alternating current. The rectification module includes a bridge rectifier BR1 and a second capacitor C2 connected in parallel, and the input end of the bridge rectifier BR1 is connected to the output end of the surge absorption and anti-interference module.

采样模块,用于获取整流模块输出电压。采样模块包括光耦IC1,光耦IC1的输入端与整流模块的输出端相连。具体地,采样模块还包括第一电阻R1及第二电阻R2,光耦IC1的输入端与第二电阻R2并联后串接第一电阻R1和整流模块的输出端。通过调节第一电阻R1和第二电阻R2的电阻值,可以调节光耦IC1的输出电压,进而可以调节欠压脱扣器的脱扣电压。The sampling module is used to obtain the output voltage of the rectification module. The sampling module includes an optocoupler IC1, and the input end of the optocoupler IC1 is connected to the output end of the rectification module. Specifically, the sampling module further includes a first resistor R1 and a second resistor R2, the input terminal of the optocoupler IC1 is connected in parallel with the second resistor R2, and then connected in series with the first resistor R1 and the output terminal of the rectification module. By adjusting the resistance values of the first resistor R1 and the second resistor R2, the output voltage of the optocoupler IC1 can be adjusted, and then the tripping voltage of the undervoltage release can be adjusted.

通断控制模块,用于控制线圈L得电与失电。通断控制模块包括MOS管Q1。MOS管Q1的栅极、源极和光耦IC1的输出端及开关电源串接,MOS管Q1的源极、漏极和线圈L及开关电源串接,线圈L串接在MOS管Q1的漏极和开关电源的正极之间。开关电源为线圈L提供稳压电源。The on-off control module is used to control the coil L to be energized and de-energized. The on-off control module includes a MOS transistor Q1. The gate and source of the MOS transistor Q1 are connected in series with the output terminal of the optocoupler IC1 and the switching power supply, the source and drain of the MOS transistor Q1 are connected in series with the coil L and the switching power supply, and the coil L is connected in series with the drain of the MOS transistor Q1 and the positive pole of the switching power supply. The switching power supply provides a regulated power supply for the coil L.

线圈L的电阻值为300~2000Ω,通过调节开关电源的输出电压,可以调节线圈L的电压,使其与线圈的电阻匹配,确保在脱扣前线圈两端有稳定的工作电压及较小的发热。The resistance value of the coil L is 300~2000Ω. By adjusting the output voltage of the switching power supply, the voltage of the coil L can be adjusted to match the resistance of the coil to ensure a stable working voltage and a small fever.

当采样模块输出的电压值大于设定电压值时, MOS管Q1导通,开关电源、线圈L、MOS管Q1构成串联回路,线圈L得电,与线圈L相配合的衔铁被吸合,断路器能正常分合闸。当采样模块输出的电压值小于设定电压值时, MOS管Q1截止,线圈L失电,衔铁被释放,断路器处于脱扣状态。When the voltage value output by the sampling module is greater than the set voltage value, the MOS tube Q1 is turned on, the switching power supply, the coil L, and the MOS tube Q1 form a series circuit, the coil L is energized, the armature matched with the coil L is attracted, and the circuit is broken The switch can be opened and closed normally. When the voltage value output by the sampling module is lower than the set voltage value, the MOS transistor Q1 is cut off, the coil L is de-energized, the armature is released, and the circuit breaker is in a tripped state.

通过将光耦IC1的输出端与MOS管Q1的栅极相连,并将MOS管Q1的漏极、源极分别与开关电源、线圈L相连,光耦IC1控制MOS管Q1的通断来控制线圈L的得电与失电,实现衔铁的吸合与释放,电路前后隔离,安全性和稳定性极大提高;该欠压脱扣器的电路输出功率大于3W,线圈绕制方便灵活。By connecting the output terminal of the optocoupler IC1 to the gate of the MOS transistor Q1, and connecting the drain and source of the MOS transistor Q1 to the switching power supply and the coil L respectively, the optocoupler IC1 controls the on-off of the MOS transistor Q1 to control the coil The energization and de-energization of L realizes the attraction and release of the armature, the front and rear isolation of the circuit, and the safety and stability are greatly improved; the circuit output power of the undervoltage release is greater than 3W, and the coil winding is convenient and flexible.

上述实施例只为说明本实用新型的技术构思及特点,是一种优选的实施例,其目的在于熟悉此项技术的人士能够了解本实用新型的内容并据以实施,并不能以此限定本实用新型的保护范围。凡根据本实用新型的精神实质所作的等效变换或修饰,都应涵盖在本实用新型的保护范围之内。The above-mentioned embodiment is only to illustrate the technical conception and characteristics of the present utility model. It is a preferred embodiment. Protection scope of utility model. All equivalent transformations or modifications made according to the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims (8)

1.一种交直流通用欠压脱扣器,包括开关电源、线圈、用于在外网为交流电时将其转换为直流电的整流模块;其特征在于还包括:用于获取所述整流模块输出电压的采样模块、用于控制所述线圈得电与失电的通断控制模块,所述开关电源为所述通断控制模块及所述线圈提供稳压电源,所述采样模块包括光耦,所述光耦的输入端与所述整流模块的输出端相连,所述通断控制模块包括MOS管,所述MOS管的源极及漏极与所述开关电源、所述线圈串接,所述MOS管的栅极与所述光耦的输出端相连,当所述采样模块输出的电压值大于设定电压值时,所述MOS管导通,所述开关电源、所述线圈、所述MOS管构成串联回路,所述线圈得电;当所述采样模块输出的电压值小于设定电压值时,所述MOS管截止,所述线圈失电。 1. A common undervoltage release for AC and DC, comprising a switching power supply, a coil, and a rectifying module for converting it to direct current when the external network is alternating current; it is characterized in that it also includes: for obtaining the output voltage of the rectifying module The sampling module, the on-off control module for controlling the coil to be energized and de-energized, the switching power supply provides a regulated power supply for the on-off control module and the coil, the sampling module includes an optocoupler, the The input end of the optocoupler is connected to the output end of the rectifier module, the on-off control module includes a MOS transistor, the source and drain of the MOS transistor are connected in series with the switching power supply and the coil, and the The gate of the MOS transistor is connected to the output terminal of the optocoupler. When the voltage value output by the sampling module is greater than the set voltage value, the MOS transistor is turned on, and the switching power supply, the coil, and the MOS The tubes form a series circuit, and the coil is energized; when the voltage value output by the sampling module is lower than the set voltage value, the MOS tube is cut off, and the coil is de-energized. 2.根据权利要求1所述的欠压脱扣器,其特征在于:所述线圈串接在所述开关电源的正极和所述MOS管的漏极之间。 2. The undervoltage release according to claim 1, wherein the coil is connected in series between the positive pole of the switching power supply and the drain pole of the MOS transistor. 3.根据权利要求1所述的欠压脱扣器,其特征在于:所述MOS管的栅极、源极和所述光耦及所述开关电源串接。 3. The undervoltage release according to claim 1, characterized in that: the gate and source of the MOS transistor are connected in series with the optocoupler and the switching power supply. 4.根据权利要求1所述的欠压脱扣器,其特征在于:该欠压脱扣器包括浪涌吸收及抗干扰模块,所述浪涌吸收及抗干扰模块的输入端与外网相连且输出端与所述整流模块的输入端相连,所述浪涌吸收及抗干扰模块包括相并联的压敏电阻和第一电容。 4. The undervoltage release according to claim 1, characterized in that: the undervoltage release includes a surge absorption and anti-interference module, and the input end of the surge absorption and anti-interference module is connected to the external network And the output end is connected to the input end of the rectification module, and the surge absorption and anti-interference module includes a piezoresistor and a first capacitor connected in parallel. 5.根据权利要求4所述的欠压脱扣器,其特征在于:所述整流模块包括相并联的桥式整流器及第二电容,所述桥式整流器的输入端与所述浪涌吸收及抗干扰模块的输出端相连。 5. The undervoltage release according to claim 4, characterized in that: the rectification module includes a bridge rectifier and a second capacitor connected in parallel, the input end of the bridge rectifier is connected to the surge absorber and The output terminals of the anti-jamming module are connected. 6.根据权利要求1所述的欠压脱扣器,其特征在于:所述采样模块还包括第二电阻、第一电阻,所述光耦与所述第二电阻并联后串接所述第一电阻及所述整流模块。 6. The undervoltage release according to claim 1, wherein the sampling module further includes a second resistor and a first resistor, and the optocoupler is connected in parallel with the second resistor and then connected in series with the first resistor. A resistor and the rectification module. 7.根据权利要求1所述的欠压脱扣器,其特征在于:所述线圈的电阻值为300~2000Ω。 7. The undervoltage release according to claim 1, characterized in that: the resistance value of the coil is 300~2000Ω. 8.根据权利要求1所述的欠压脱扣器,其特征在于:所述外网的额定电压为230V以下的交流电压或320V以下的直流电压。 8. The undervoltage release according to claim 1, characterized in that: the rated voltage of the external network is an AC voltage below 230V or a DC voltage below 320V.
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