WO2023004739A1 - Emergency output circuit used for starting led lamp tube having leakage protection - Google Patents

Emergency output circuit used for starting led lamp tube having leakage protection Download PDF

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Publication number
WO2023004739A1
WO2023004739A1 PCT/CN2021/109565 CN2021109565W WO2023004739A1 WO 2023004739 A1 WO2023004739 A1 WO 2023004739A1 CN 2021109565 W CN2021109565 W CN 2021109565W WO 2023004739 A1 WO2023004739 A1 WO 2023004739A1
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Prior art keywords
circuit
voltage
leakage protection
pwm
output
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PCT/CN2021/109565
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French (fr)
Chinese (zh)
Inventor
柯建军
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深圳市比尔达科技有限公司
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Application filed by 深圳市比尔达科技有限公司 filed Critical 深圳市比尔达科技有限公司
Priority to PCT/CN2021/109565 priority Critical patent/WO2023004739A1/en
Priority to US17/852,319 priority patent/US11991806B2/en
Publication of WO2023004739A1 publication Critical patent/WO2023004739A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting

Definitions

  • the invention relates to the technical field of emergency power supply circuits, in particular to an emergency output circuit for starting an LED lamp tube with leakage protection.
  • the emergency power supply is the power supply for evacuation lighting or other urgently needed electrical equipment in the event of a fire or other emergency in a building;
  • the emergency power supply consists of a charger, an inverter, a lithium battery, and an isolation transformer
  • It is an emergency power supply that converts the DC voltage into an AC voltage composed of devices such as switches and switches; when industrial and civil buildings are in a fire emergency state, in order to ensure the success of fire fighting and rescue work, it is an independent power supply that supplies power to fire-fighting electrical equipment It is called an emergency power supply;
  • the "Code for Electrical Design of Civil Buildings" clearly stipulates that: the first-level load should be powered by two power sources, and when one power supply fails, the other power supply should not be damaged; the power supply form of the first-level load has two high-voltage Power supply and one high-voltage power supply and one low-voltage power supply, diesel generator set or battery pack; in addition to the above two power supplies, an emergency power supply must be added for the particularly important load in the primary load.
  • the present invention provides an emergency output circuit for starting LED lamps with leakage protection, through which the PWM pulse generator outputs a complementary drive PWM rectangular wave with adjustable dead time, after Step-up rectification and filtering form a DC 250V voltage, and then form an alternating square wave on the LED lamp through a full-bridge inverter circuit.
  • the PWM pulse generator outputs a complementary drive PWM rectangular wave with adjustable dead time, after Step-up rectification and filtering form a DC 250V voltage, and then form an alternating square wave on the LED lamp through a full-bridge inverter circuit.
  • complementary PWM control two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED lamp.
  • an AC rectangular wave that gradually changes from a 250V DC output to a stable AC135V output can be obtained.
  • the corrected AC rectangular wave can replace the existing lighting method to light the LED lamp with leakage protection, effectively reducing costs. , to simplify the circuit.
  • the present invention provides an emergency output circuit for starting an LED lamp with leakage protection, including a charging circuit, a push-pull boost circuit and a full-bridge inverter circuit provided with a PWM pulse generator, and the charging circuit is connected to To the PWM pulse generator, the PWM pulse generator includes a PWM chip.
  • the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip.
  • the PWM chip outputs a complementary driver with adjustable dead time through two output pins.
  • PWM rectangular wave to the push-pull boost circuit the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full-bridge inverter circuit.
  • the full-bridge inverter circuit includes an inverter and a correction circuit.
  • the DC 250V voltage of the push-pull boost circuit outputs a stable AC135V AC voltage through the correction circuit in the inverter.
  • the inverter includes a first NMOS transistor group and a second NMOS transistor group that are alternately conducted, the first NMOS transistor group includes a first NMOS transistor and a second NMOS transistor, and the second NMOS transistor group includes a third NMOS transistor and a second NMOS transistor group.
  • the fourth NMOS tube when the first NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the first NMOS tube to the live line of the LED tube with leakage protection, the internal drive power supply of the LED tube with leakage protection, The zero line of the LED lamp tube with leakage protection, and then to the second NMOS tube to return to the negative pole of the power supply; when the second NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the third NMOS tube to the power supply with leakage protection.
  • the neutral line of the LED tube, the internal drive power supply of the LED tube with leakage protection, the live wire of the LED tube with leakage protection, and then the fourth NMOS tube returns to the negative pole of the power supply.
  • the correction circuit includes a first voltage divider unit, a time compensation unit and an internal operational amplifier chip. After the AC135V AC voltage is divided by the first voltage divider unit, the time compensation unit is used as the first input of the internal operational amplifier chip for time compensation. end for processing.
  • the correction circuit further includes a second voltage dividing unit, which divides a preset voltage output to the correction circuit and then inputs it to the second input terminal of the internal operational amplifier chip.
  • the push-pull boost circuit includes a transformer and a full-bridge rectifier circuit, and the complementary drive PWM rectangular wave with adjustable dead time is boosted by the transformer and rectified into a 250V DC voltage in the full-bridge rectifier circuit.
  • the push-pull boost circuit further includes a filter capacitor, the filter capacitor is connected in parallel with the full-bridge rectifier circuit, and the 250V DC voltage is filtered into a smooth 250V DC voltage by the filter capacitor.
  • control terminal when the control terminal detects a power failure state, it immediately outputs a high level to the soft-start terminal pin of the PWM chip, so that the voltage of the soft-start terminal pin rises slowly to 5V.
  • control terminal when the control terminal detects the state of the commercial power, it outputs a low level to the soft start terminal pin of the PWM chip, and both output terminal pins of the PWM chip output a low level.
  • the present invention provides an emergency output circuit for starting LED lamps with leakage protection, including a PWM pulse generator, a push-pull boost circuit and a full-bridge inverter circuit
  • the PWM pulse generator includes a PWM chip, when the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip, and the PWM chip outputs a complementary driving PWM rectangular wave with adjustable dead time through two output pins to Push-pull boost circuit; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full-bridge inverter circuit.
  • the full-bridge inverter circuit includes an inverter and a correction circuit.
  • Push-pull boost The DC 250V voltage of the circuit is formed in the inverter through the correction circuit to output a stable AC135V AC voltage; through the PWM pulse generator, the complementary drive PWM rectangular wave with adjustable dead time is output, and the DC 250V voltage is formed after boost rectification and filtering , and then through the full-bridge inverter circuit to form an alternating square wave on the LED tube, using complementary PWM control, two pairs of MOS tubes are alternately turned on, and an AC voltage UAB is generated on the LED tube, and finally a 250V voltage is obtained through a correction circuit
  • the DC output gradually turns into a stable AC135V output AC rectangular wave.
  • the corrected rectangular wave can replace the existing lighting method to light up the LED lamp with leakage protection, which effectively reduces costs and simplifies the circuit.
  • Fig. 1 is the circuit diagram of the pulse generator of the present invention.
  • Fig. 2 is a push-pull boost circuit diagram of the present invention.
  • Fig. 3 is a full-bridge inverter circuit diagram of the present invention.
  • Fig. 4 is a logic diagram of the working principle of the circuit of the present invention.
  • the present invention specifically provides an emergency output circuit for starting an LED lamp with leakage protection, please refer to Figure 1- Figure 4, including: a charging circuit, a PWM pulse generator The push-pull boost circuit and the full-bridge inverter circuit of the converter, the charging circuit is connected to the PWM pulse generator, the PWM pulse generator includes a PWM chip, when the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip, the PWM The chip outputs a complementary drive PWM rectangular wave with adjustable dead time to the push-pull boost circuit through two output pins; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full bridge Inverter circuit, the full-bridge inverter circuit includes an inverter and a correction circuit, the DC 250V voltage of the push-pull booster circuit outputs a stable AC135V AC voltage through the correction circuit in the inverter; the current common emergency power supply output in the market is
  • BOOST-OFF When a power failure is detected, BOOST-OFF immediately outputs a high level, Q8 is turned on, Q5 is turned off, the voltage of pin 8 of the PWM chip slowly rises to 5V, and the output of pins 11 and 14 of the PWM has adjustable dead time.
  • the inverter includes a first NMOS transistor group and a second NMOS transistor group that are alternately conducted, the first NMOS transistor group includes a first NMOS transistor and a second NMOS transistor, and the second NMOS transistor group includes The third NMOS tube and the fourth NMOS tube, when the first NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the first NMOS tube to the live wire of the LED lamp tube with leakage protection, and the LED lamp with leakage protection The internal driving power of the tube, the neutral line of the LED lamp with leakage protection, and then the second NMOS tube returns to the negative pole of the power supply; when the second NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply and passes through the third NMOS tube To the neutral line of the LED tube with leakage protection, the internal drive power of the LED tube with leakage protection, the live line of the LED tube with leakage protection, and then
  • Q13 and Q14 are turned on, through Q13, the neutral line of the LED lamp with leakage protection, the internal driving power of the LED lamp, the live wire of the LED lamp, and then back to the negative pole of the power supply through Q14.
  • an alternating square wave has been formed, using complementary PWM control, two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED lamp tube.
  • the correction circuit includes a first voltage divider unit, a time compensation unit and an internal operational amplifier chip. After the AC135V AC voltage is divided by the first voltage divider unit, the time compensation unit is used as time compensation to the internal operational amplifier.
  • the first input terminal of the chip is processed; in a preferred embodiment, it is mentioned that the correction circuit also includes a second voltage dividing unit, and the second voltage dividing unit divides a preset voltage output to the correction circuit and then inputs it to the The second input of the internal operational amplifier chip.
  • UAB gets a voltage of 250V, it is divided by R2, R68, R69, and D16, R70, R71, and C20 are used as time compensation to pin 1 of chip U1. Finally, after processing by the internal operational amplifier of the chip, a 250V DC output is obtained. Slowly become a stable AC135V output UAB; D16, R70, R71, and C20 as time compensation actually play a role in controlling the corresponding time.
  • the first resistor and the first capacitor are connected between the input pin and the compensation pin of the internal operational amplifier chip as loop compensation, and the parameters of the first resistor and the first capacitor are adjusted so that The rectangular wave output by the correction circuit expands slowly; add R77 and C26 to the pins 1 and 9 of the chip U1 as loop compensation.
  • the output rectangular wave of UAB can be slowly expanded to match the leakage protection
  • the preset current inside the lamp tube achieves the purpose of not being detected to cause electric shock to the human body, so the corrected rectangular wave can light up the LED lamp tube with leakage protection.
  • the push-pull boost circuit includes a transformer and a full-bridge rectifier circuit, and the complementary drive PWM rectangular wave with adjustable dead time is boosted by the transformer and rectified into 250V in the full-bridge rectifier circuit DC voltage; mentioned in a preferred embodiment: the repair push-pull boost circuit also includes a filter capacitor, the filter capacitor is connected in parallel with the full-bridge rectifier circuit, and the 250V DC voltage is filtered into a smooth 250V DC voltage at the filter capacitor; power failure state: PWM1 and PWM11 output complementary driving pulses, Q6 and Q7 are turned on alternately, after boosted by transformer T2, the full bridge rectifier circuit composed of D2, D3, D4, D5 is rectified to 250V, and filtered by C41 capacitor to smooth DC 250V Voltage.
  • the advantage of the present invention is that.
  • the complementary driving PWM rectangular wave with adjustable dead time is output, and the DC 250V voltage is formed through boost rectification and filtering, and then the alternating square wave is formed on the LED lamp through the full-bridge inverter circuit.
  • PWM control two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED tube, and finally an AC rectangular wave that gradually changes from a 250V DC output to a stable AC135V output is obtained through a correction circuit, and the corrected AC rectangular wave It can replace the existing lighting method to light the LED lamp tube with leakage protection, effectively reduce the cost and simplify the circuit.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Provided is an emergency output circuit used for starting an LED lamp tube having leakage protection, comprising: a charging circuit; and, provided with a PWM pulse generator, a push-pull boost circuit and a full bridge inverter circuit; the charging circuit is connected to the PWM pulse generator, the PWM pulse generator comprises a PWM chip, and when a control terminal detects a power outage state, a high electrical level is immediately outputted to the PWM chip, and the PWM pulse generator is used for outputting a complementary drive PWM rectangular wave with an adjustable dead time; following boosting, rectification and filtering are performed to form a 250V DC voltage, then the full bridge inverter circuit is used to form an alternating square wave on the LED lamp tube; complementary PWM control is used, alternating the turning-on of two pairs of MOS transistors, producing an AC voltage UAB on the LED lamp tube; and finally, a correction circuit is used to obtain an AC rectangular wave slowly changed from a 250V DC output to a stable AC 135V output, thus effectively reducing cost and simplifying the circuit.

Description

用于启动具有漏电保护ＬＥＤ灯管的应急输出电路Used to start the emergency output circuit with leakage protection LED lamp 技术领域technical field
本发明涉及应急电源电路技术领域，尤其涉及一种用于启动具有漏电保护LED灯管的应急输出电路。The invention relates to the technical field of emergency power supply circuits, in particular to an emergency output circuit for starting an LED lamp tube with leakage protection.
背景技术Background technique
应急电源是在建筑物发生火情或其他紧急情况下，对疏散照明或其他消防、紧急状态急需的各种用电设备供电的电源；应急电源由充电器、逆变器、锂电池、隔离变压器、切换开关等装置组成的一种把直流电压逆变成交流电压的应急电源；当工业与民用建筑处于火灾应急状态时，为了保证火灾扑救工作的成功，担负向消防用电设备供电的独立电源称为应急电源；《民用建筑电气设计规范》明确规定：一级负荷应由两个电源供电，当一个电源发生故障时，另一个电源应不致受到损坏；一级负荷的电源形式有二路高压电源和一路高压电源及一路低压电源、柴油发电机组或蓄电池组；一级负荷中的特别重要负荷除上述两个电源外，还必须增设应急电源。The emergency power supply is the power supply for evacuation lighting or other urgently needed electrical equipment in the event of a fire or other emergency in a building; the emergency power supply consists of a charger, an inverter, a lithium battery, and an isolation transformer It is an emergency power supply that converts the DC voltage into an AC voltage composed of devices such as switches and switches; when industrial and civil buildings are in a fire emergency state, in order to ensure the success of fire fighting and rescue work, it is an independent power supply that supplies power to fire-fighting electrical equipment It is called an emergency power supply; the "Code for Electrical Design of Civil Buildings" clearly stipulates that: the first-level load should be powered by two power sources, and when one power supply fails, the other power supply should not be damaged; the power supply form of the first-level load has two high-voltage Power supply and one high-voltage power supply and one low-voltage power supply, diesel generator set or battery pack; in addition to the above two power supplies, an emergency power supply must be added for the particularly important load in the primary load.
技术问题technical problem
目前市场普遍的应急电源输出都是DC直流输出，所以面临的问题是再接到带有漏电保护LED灯管的时候都是不能使灯管点亮的，所以普遍认为需要应急电源输出同样的交流正弦波才可以点亮这种漏电保护灯管，正弦波设计上复杂，成本也高，做出来体积也大，故亟需一种新的输出方式以解决现有技术中的问题。At present, the common emergency power output in the market is DC output, so the problem is that the lamp cannot be turned on when it is connected to the LED lamp with leakage protection, so it is generally believed that the same AC output is required for the emergency power supply. Only sine waves can light this kind of leakage protection lamp. The design of sine waves is complicated, the cost is high, and the volume is also large. Therefore, a new output method is urgently needed to solve the problems in the prior art.
技术解决方案technical solution
针对上述技术中存在的不足之处，本发明提供一种用于启动具有漏电保护LED灯管的应急输出电路，通过PWM脉冲发生器输出带有死区时间可调的互补驱动PWM矩形波，经过升压整流滤波形成直流250V电压，再通过全桥逆变电路在LED灯管上形成交变方波，利用互补PWM控制，两对MOS管交替导通，在LED灯管上产生交流电压UAB，最后通过修正电路得到一个由250V直流输出慢慢变成稳定的AC135V输出的交流矩形波，修正后的交流矩形波可以取代现有的点亮方式点亮带漏电保护的LED灯管，有效降低成本，简化电路。Aiming at the deficiencies in the above-mentioned technologies, the present invention provides an emergency output circuit for starting LED lamps with leakage protection, through which the PWM pulse generator outputs a complementary drive PWM rectangular wave with adjustable dead time, after Step-up rectification and filtering form a DC 250V voltage, and then form an alternating square wave on the LED lamp through a full-bridge inverter circuit. Using complementary PWM control, two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED lamp. Finally, through the correction circuit, an AC rectangular wave that gradually changes from a 250V DC output to a stable AC135V output can be obtained. The corrected AC rectangular wave can replace the existing lighting method to light the LED lamp with leakage protection, effectively reducing costs. , to simplify the circuit.
为实现上述目的，本发明提供一种用于启动具有漏电保护LED灯管的应急输出电路，包括充电电路、设有PWM脉冲发生器的推挽升压电路和全桥逆变电路，充电电路连接至PWM脉冲发生器，PWM脉冲发生器包括PWM芯片，当控制端检测到停电状态时，立即输出高电平至PWM芯片，PWM芯片通过两输出引脚输出带有死区时间可调的互补驱动PWM矩形波至推挽升压电路；矩形波在推挽升压电路中升压整流成平滑的直流250V电压并输出至全桥逆变电路，全桥逆变电路包括逆变器和修正电路，推挽升压电路的直流250V电压在逆变器中通过修正电路输出稳定的AC135V交流电压。In order to achieve the above object, the present invention provides an emergency output circuit for starting an LED lamp with leakage protection, including a charging circuit, a push-pull boost circuit and a full-bridge inverter circuit provided with a PWM pulse generator, and the charging circuit is connected to To the PWM pulse generator, the PWM pulse generator includes a PWM chip. When the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip. The PWM chip outputs a complementary driver with adjustable dead time through two output pins. PWM rectangular wave to the push-pull boost circuit; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full-bridge inverter circuit. The full-bridge inverter circuit includes an inverter and a correction circuit. The DC 250V voltage of the push-pull boost circuit outputs a stable AC135V AC voltage through the correction circuit in the inverter.
具体的：逆变器包括交替导通的第一NMOS管组和第二NMOS管组，第一NMOS管组包括第一NMOS管和第二NMOS管，第二NMOS管组包括第三NMOS管和第四NMOS管，当第一NMOS管组导通时，电流由直流250V电源正极输出，经过第一NMOS管到带有漏电保护LED灯管的火线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的零线，再到第二NMOS管回到电源负极；当第二NMOS管组导通时，电流由直流250V电源正极输出，经过第三NMOS管到带有漏电保护LED灯管的零线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的火线，再到第四NMOS管回到电源负极。Specifically: the inverter includes a first NMOS transistor group and a second NMOS transistor group that are alternately conducted, the first NMOS transistor group includes a first NMOS transistor and a second NMOS transistor, and the second NMOS transistor group includes a third NMOS transistor and a second NMOS transistor group. The fourth NMOS tube, when the first NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the first NMOS tube to the live line of the LED tube with leakage protection, the internal drive power supply of the LED tube with leakage protection, The zero line of the LED lamp tube with leakage protection, and then to the second NMOS tube to return to the negative pole of the power supply; when the second NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the third NMOS tube to the power supply with leakage protection. The neutral line of the LED tube, the internal drive power supply of the LED tube with leakage protection, the live wire of the LED tube with leakage protection, and then the fourth NMOS tube returns to the negative pole of the power supply.
具体的：修正电路包括第一分压单元、时间补偿单元和内部运算放大器芯片，AC135V交流电压经第一分压单元分压后，将时间补偿单元作为时间补偿到内部运算放大器芯片的第一输入端进行处理。Specifically: the correction circuit includes a first voltage divider unit, a time compensation unit and an internal operational amplifier chip. After the AC135V AC voltage is divided by the first voltage divider unit, the time compensation unit is used as the first input of the internal operational amplifier chip for time compensation. end for processing.
作为优选：修正电路还包括第二分压单元，第二分压单元将输出到修正电路的一个预设电压进行分压后输入至内部运算放大器芯片的第二输入端。Preferably, the correction circuit further includes a second voltage dividing unit, which divides a preset voltage output to the correction circuit and then inputs it to the second input terminal of the internal operational amplifier chip.
作为优选：在内部运算放大器芯片的输入引脚与补偿引脚之间连接第一电阻和第一电容作为环路补偿，调节第一电阻和第一电容的参数使修正电路输出的矩形波缓慢展开。As a preference: connect the first resistor and the first capacitor between the input pin and the compensation pin of the internal operational amplifier chip as loop compensation, adjust the parameters of the first resistor and the first capacitor so that the rectangular wave output by the correction circuit slowly expands .
具体的：推挽升压电路包括变压器和全桥整流电路，带有死区时间可调的互补驱动PWM矩形波经变压器进行升压，并且在全桥整流电路中整流成250V直流电压。Specifically: the push-pull boost circuit includes a transformer and a full-bridge rectifier circuit, and the complementary drive PWM rectangular wave with adjustable dead time is boosted by the transformer and rectified into a 250V DC voltage in the full-bridge rectifier circuit.
作为优选：推挽升压电路还包括滤波电容，滤波电容与全桥整流电路并联，250V直流电压在滤波电容滤波成平滑的250V直流电压。Preferably, the push-pull boost circuit further includes a filter capacitor, the filter capacitor is connected in parallel with the full-bridge rectifier circuit, and the 250V DC voltage is filtered into a smooth 250V DC voltage by the filter capacitor.
具体的：当控制端检测到停电状态时，立即输出高电平至PWM芯片的软启动端脚，使软启动端脚的电压缓慢上升至5V。Specifically: when the control terminal detects a power failure state, it immediately outputs a high level to the soft-start terminal pin of the PWM chip, so that the voltage of the soft-start terminal pin rises slowly to 5V.
具体的：当控制端检测到市电状态时，输出低电平至PWM芯片的软启动端脚，PWM芯片的两输出端引脚均输出低电平。Specifically: when the control terminal detects the state of the commercial power, it outputs a low level to the soft start terminal pin of the PWM chip, and both output terminal pins of the PWM chip output a low level.
有益效果Beneficial effect
本发明的有益效果是：与现有技术相比，本发明提供的一种用于启动具有漏电保护LED灯管的应急输出电路，包括PWM脉冲发生器、推挽升压电路和全桥逆变电路，PWM脉冲发生器包括PWM芯片，当控制端检测到停电状态时，立即输出高电平至PWM芯片，PWM芯片通过两输出引脚输出带有死区时间可调的互补驱动PWM矩形波至推挽升压电路；矩形波在推挽升压电路中升压整流成平滑的直流250V电压并输出至全桥逆变电路，全桥逆变电路包括逆变器和修正电路，推挽升压电路的直流250V电压在逆变器中形通过修正电路输出稳定的AC135V交流电压；通过PWM脉冲发生器输出带有死区时间可调的互补驱动PWM矩形波，经过升压整流滤波形成直流250V电压，再通过全桥逆变电路在LED灯管上形成交变方波，利用互补PWM控制，两对MOS管交替导通，在LED灯管上产生交流电压UAB，最后通过修正电路得到一个由250V直流输出慢慢变成稳定的AC135V输出的交流矩形波，修正后的矩形波可以取代现有的点亮方式点亮带漏电保护的LED灯管，有效降低成本，简化电路。The beneficial effects of the present invention are: compared with the prior art, the present invention provides an emergency output circuit for starting LED lamps with leakage protection, including a PWM pulse generator, a push-pull boost circuit and a full-bridge inverter circuit, the PWM pulse generator includes a PWM chip, when the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip, and the PWM chip outputs a complementary driving PWM rectangular wave with adjustable dead time through two output pins to Push-pull boost circuit; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full-bridge inverter circuit. The full-bridge inverter circuit includes an inverter and a correction circuit. Push-pull boost The DC 250V voltage of the circuit is formed in the inverter through the correction circuit to output a stable AC135V AC voltage; through the PWM pulse generator, the complementary drive PWM rectangular wave with adjustable dead time is output, and the DC 250V voltage is formed after boost rectification and filtering , and then through the full-bridge inverter circuit to form an alternating square wave on the LED tube, using complementary PWM control, two pairs of MOS tubes are alternately turned on, and an AC voltage UAB is generated on the LED tube, and finally a 250V voltage is obtained through a correction circuit The DC output gradually turns into a stable AC135V output AC rectangular wave. The corrected rectangular wave can replace the existing lighting method to light up the LED lamp with leakage protection, which effectively reduces costs and simplifies the circuit.
附图说明Description of drawings
图1为本发明的脉冲发生器电路图。Fig. 1 is the circuit diagram of the pulse generator of the present invention.
图2为本发明的推挽升压电路图。Fig. 2 is a push-pull boost circuit diagram of the present invention.
图3为本发明的全桥逆变电路图。Fig. 3 is a full-bridge inverter circuit diagram of the present invention.
图4为本发明的电路工作原理逻辑图。Fig. 4 is a logic diagram of the working principle of the circuit of the present invention.
本发明的实施方式Embodiments of the present invention
为了更清楚地表述本发明，下面结合附图对本发明作进一步地描述。In order to express the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings.
目前市场普遍的应急电源输出都是DC直流输出，所以面临的问题是再接到带有漏电保护LED灯管的时候都是不能使灯管点亮的，所以普遍认为需要应急电源输出同样的交流正弦波才可以点亮这种漏电保护灯管，正弦波设计上复杂，成本也高，做出来体积也大，故亟需一种新的输出方式以解决现有技术中的问题。At present, the common emergency power output in the market is DC output, so the problem is that the lamp cannot be turned on when it is connected to the LED lamp with leakage protection, so it is generally believed that the same AC output is required for the emergency power supply. Only sine waves can light this kind of leakage protection lamp. The design of sine waves is complicated, the cost is high, and the volume is also large. Therefore, a new output method is urgently needed to solve the problems in the prior art.
为解决现有技术中的缺陷和不足，本发明具体的提供一种用于启动具有漏电保护LED灯管的应急输出电路，请参阅图1-图4，包括：充电电路、设有PWM脉冲发生器的推挽升压电路和全桥逆变电路，充电电路连接至PWM脉冲发生器，PWM脉冲发生器包括PWM芯片，当控制端检测到停电状态时，立即输出高电平至PWM芯片，PWM芯片通过两输出引脚输出带有死区时间可调的互补驱动PWM矩形波至推挽升压电路；矩形波在推挽升压电路中升压整流成平滑的直流250V电压并输出至全桥逆变电路，全桥逆变电路包括逆变器和修正电路，推挽升压电路的直流250V电压在逆变器中通过修正电路输出稳定的AC135V交流电压；目前市场普遍的应急电源输出都是DC直流输出，所以面临的问题是再接到带有漏电保护LED灯管的时候都是不能使灯管点亮的，所以普遍认为需要应急电源输出同样的交流正弦波才可以点亮这种漏电保护灯管，而本方案采用的是输出矫正的交流矩形波UAB同样也能达到正弦波输出的要求；在本实施例中提及：当控制端检测到停电状态时，立即输出高电平至PWM芯片的软启动端脚，使软启动端脚的电压缓慢上升至5V；在本实施例中提及：当控制端检测到市电状态时，输出低电平至PWM芯片的软启动端脚，PWM芯片的两输出端引脚均输出低电平；正常市电状态，由充电电路给电池组BAT+充电，BOOST-OFF输出低电平，Q8截止，Q5导通，PWM芯片的8脚输出低电平，PWM的11脚，14脚都输出低电平。在检测到停电状态，BOOST-OFF立即输出高电平，Q8导通，Q5截止，PWM芯片的8脚电压慢慢上升至5V，PWM的11脚，14脚输出带有死区时间可调的互补驱动PWM矩形波PWM1，PWM11。In order to solve the defects and deficiencies in the prior art, the present invention specifically provides an emergency output circuit for starting an LED lamp with leakage protection, please refer to Figure 1-Figure 4, including: a charging circuit, a PWM pulse generator The push-pull boost circuit and the full-bridge inverter circuit of the converter, the charging circuit is connected to the PWM pulse generator, the PWM pulse generator includes a PWM chip, when the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip, the PWM The chip outputs a complementary drive PWM rectangular wave with adjustable dead time to the push-pull boost circuit through two output pins; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full bridge Inverter circuit, the full-bridge inverter circuit includes an inverter and a correction circuit, the DC 250V voltage of the push-pull booster circuit outputs a stable AC135V AC voltage through the correction circuit in the inverter; the current common emergency power supply output in the market is DC output, so the problem is that when connected to the LED lamp with leakage protection, the lamp cannot be lit, so it is generally believed that the emergency power supply needs to output the same AC sine wave to light up the leakage To protect the light tube, and this program uses the output rectified AC rectangular wave UAB, which can also meet the requirements of sine wave output; in this embodiment, it is mentioned that when the control terminal detects a power failure state, it immediately outputs a high level to The soft-start pin of the PWM chip makes the voltage of the soft-start pin rise slowly to 5V; in this embodiment, it is mentioned that when the control terminal detects the state of the mains power, it outputs a low level to the soft-start pin of the PWM chip , the two output pins of the PWM chip output low level; in the normal city power state, the charging circuit charges the battery pack BAT+, BOOST-OFF outputs low level, Q8 is cut off, Q5 is turned on, and the 8 pins of the PWM chip output Low level, PWM pin 11 and pin 14 both output low level. When a power failure is detected, BOOST-OFF immediately outputs a high level, Q8 is turned on, Q5 is turned off, the voltage of pin 8 of the PWM chip slowly rises to 5V, and the output of pins 11 and 14 of the PWM has adjustable dead time. Complementary driving PWM rectangular wave PWM1, PWM11.
在本实施例中提及：逆变器包括交替导通的第一NMOS管组和第二NMOS管组，第一NMOS管组包括第一NMOS管和第二NMOS管，第二NMOS管组包括第三NMOS管和第四NMOS管，当第一NMOS管组导通时，电流由直流250V电源正极输出，经过第一NMOS管到带有漏电保护LED灯管的火线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的零线，再到第二NMOS管回到电源负极；当第二NMOS管组导通时，电流由直流250V电源正极输出，经过第三NMOS管到带有漏电保护LED灯管的零线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的火线，再到第四NMOS管回到电源负极；停电状态：推挽电路升压输出稳定的250V后，逆变器电路开始接上250V电源，先由Q12、Q15导通，Q13、Q14截止，则电流由直流电源正极输出，经Q12、带有漏电保护LED灯管的火线，LED灯管内部驱动电源，LED灯管的零线，再到Q15回到电源负极。当Q12、Q15截止后，Q13、Q14导通，经Q13、带有漏电保护LED灯管的零线，LED灯管内部驱动电源，LED灯管的火线，再到Q14回到电源负极。此时，在LED灯管上，已形成交变方波，利用互补PWM控制，两对MOS管交替导通，在LED灯管上产生交流电压UAB。It is mentioned in this embodiment that the inverter includes a first NMOS transistor group and a second NMOS transistor group that are alternately conducted, the first NMOS transistor group includes a first NMOS transistor and a second NMOS transistor, and the second NMOS transistor group includes The third NMOS tube and the fourth NMOS tube, when the first NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the first NMOS tube to the live wire of the LED lamp tube with leakage protection, and the LED lamp with leakage protection The internal driving power of the tube, the neutral line of the LED lamp with leakage protection, and then the second NMOS tube returns to the negative pole of the power supply; when the second NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply and passes through the third NMOS tube To the neutral line of the LED tube with leakage protection, the internal drive power of the LED tube with leakage protection, the live line of the LED tube with leakage protection, and then to the fourth NMOS tube back to the negative pole of the power supply; power failure state: push-pull circuit After the boost output is stable at 250V, the inverter circuit starts to be connected to the 250V power supply, firstly Q12, Q15 are turned on, Q13, Q14 are turned off, then the current is output from the positive pole of the DC power supply, through Q12, the LED lamp with leakage protection The live wire, the internal driving power of the LED lamp, the neutral wire of the LED lamp, and then back to the negative pole of the power supply through Q15. When Q12 and Q15 are cut off, Q13 and Q14 are turned on, through Q13, the neutral line of the LED lamp with leakage protection, the internal driving power of the LED lamp, the live wire of the LED lamp, and then back to the negative pole of the power supply through Q14. At this time, on the LED lamp tube, an alternating square wave has been formed, using complementary PWM control, two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED lamp tube.
在本实施例中提及：修正电路包括第一分压单元、时间补偿单元和内部运算放大器芯片，AC135V交流电压经第一分压单元分压后，将时间补偿单元作为时间补偿到内部运算放大器芯片的第一输入端进行处理；在一个优选的实施例中提及：修正电路还包括第二分压单元，第二分压单元将输出到修正电路的一个预设电压进行分压后输入至内部运算放大器芯片的第二输入端。It is mentioned in this embodiment that the correction circuit includes a first voltage divider unit, a time compensation unit and an internal operational amplifier chip. After the AC135V AC voltage is divided by the first voltage divider unit, the time compensation unit is used as time compensation to the internal operational amplifier. The first input terminal of the chip is processed; in a preferred embodiment, it is mentioned that the correction circuit also includes a second voltage dividing unit, and the second voltage dividing unit divides a preset voltage output to the correction circuit and then inputs it to the The second input of the internal operational amplifier chip.
应急输出修正波UAB的思路。The idea of emergency output correction wave UAB.
1、输出一个预设电压,经R64，R67，R73，R72分压后到芯片U1的2脚。1. Output a preset voltage, which is divided by R64, R67, R73, and R72 to pin 2 of chip U1.
2、UAB得到一个电压250V后，经R2，R68，R69分压，D16，R70，R71，C20作为时间补偿到芯片U1的1脚，最终经芯片内部运算放大器处理后，得到一个由250V直流输出慢慢变成稳定的AC135V输出的UAB；，D16，R70，R71，C20作为时间补偿其实是起到一个控制相应时间的作用。2. After UAB gets a voltage of 250V, it is divided by R2, R68, R69, and D16, R70, R71, and C20 are used as time compensation to pin 1 of chip U1. Finally, after processing by the internal operational amplifier of the chip, a 250V DC output is obtained. Slowly become a stable AC135V output UAB; D16, R70, R71, and C20 as time compensation actually play a role in controlling the corresponding time.
在一个优选的实施例中提及：修在内部运算放大器芯片的输入引脚与补偿引脚之间连接第一电阻和第一电容作为环路补偿，调节第一电阻和第一电容的参数使修正电路输出的矩形波缓慢展开；在芯片U1的1，9脚加R77，C26作为环路补偿，通过调节R77,C26的参数可以使UAB的输出矩形波慢慢展开，目的是为了匹配漏电保护灯管内部的预设电流，达到不被检测到有人体触电的目的，所以修正后的矩形波可以点亮带漏电保护的LED灯管。In a preferred embodiment, it is mentioned that the first resistor and the first capacitor are connected between the input pin and the compensation pin of the internal operational amplifier chip as loop compensation, and the parameters of the first resistor and the first capacitor are adjusted so that The rectangular wave output by the correction circuit expands slowly; add R77 and C26 to the pins 1 and 9 of the chip U1 as loop compensation. By adjusting the parameters of R77 and C26, the output rectangular wave of UAB can be slowly expanded to match the leakage protection The preset current inside the lamp tube achieves the purpose of not being detected to cause electric shock to the human body, so the corrected rectangular wave can light up the LED lamp tube with leakage protection.
在本实施例中提及：推挽升压电路包括变压器和全桥整流电路，带有死区时间可调的互补驱动PWM矩形波经变压器进行升压，并且在全桥整流电路中整流成250V直流电压；在一个优选的实施例中提及：修推挽升压电路还包括滤波电容，滤波电容与全桥整流电路并联，250V直流电压在滤波电容滤波成平滑的250V直流电压；停电状态：PWM1，PWM11输出互补驱动脉冲，Q6，Q7交替导通，经过变压器T2升压，在由D2,D3,D4,D5构成的全桥整流电路整流成250V,在由C41电容滤波成平滑的直流250V电压。It is mentioned in this embodiment that the push-pull boost circuit includes a transformer and a full-bridge rectifier circuit, and the complementary drive PWM rectangular wave with adjustable dead time is boosted by the transformer and rectified into 250V in the full-bridge rectifier circuit DC voltage; mentioned in a preferred embodiment: the repair push-pull boost circuit also includes a filter capacitor, the filter capacitor is connected in parallel with the full-bridge rectifier circuit, and the 250V DC voltage is filtered into a smooth 250V DC voltage at the filter capacitor; power failure state: PWM1 and PWM11 output complementary driving pulses, Q6 and Q7 are turned on alternately, after boosted by transformer T2, the full bridge rectifier circuit composed of D2, D3, D4, D5 is rectified to 250V, and filtered by C41 capacitor to smooth DC 250V Voltage.
本发明的优势在于。The advantage of the present invention is that.
通过PWM脉冲发生器输出带有死区时间可调的互补驱动PWM矩形波，经过升压整流滤波形成直流250V电压，再通过全桥逆变电路在LED灯管上形成交变方波，利用互补PWM控制，两对MOS管交替导通，在LED灯管上产生交流电压UAB，最后通过修正电路得到一个由250V直流输出慢慢变成稳定的AC135V输出的交流矩形波，修正后的交流矩形波可以取代现有的点亮方式点亮带漏电保护的LED灯管，有效降低成本，简化电路。Through the PWM pulse generator, the complementary driving PWM rectangular wave with adjustable dead time is output, and the DC 250V voltage is formed through boost rectification and filtering, and then the alternating square wave is formed on the LED lamp through the full-bridge inverter circuit. PWM control, two pairs of MOS tubes are turned on alternately, and an AC voltage UAB is generated on the LED tube, and finally an AC rectangular wave that gradually changes from a 250V DC output to a stable AC135V output is obtained through a correction circuit, and the corrected AC rectangular wave It can replace the existing lighting method to light the LED lamp tube with leakage protection, effectively reduce the cost and simplify the circuit.
    以上公开的仅为本发明的几个具体实施例，但是本发明并非局限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护范围。The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes conceivable by those skilled in the art should fall within the protection scope of the present invention.

Claims (9)

  1. 一种用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，包括充电电路、设有PWM脉冲发生器的推挽升压电路和全桥逆变电路，充电电路连接至PWM脉冲发生器，PWM脉冲发生器包括PWM芯片，当控制端检测到停电状态时，立即输出高电平至PWM芯片，PWM芯片通过两输出引脚输出带有死区时间可调的互补驱动PWM矩形波至推挽升压电路；矩形波在推挽升压电路中升压整流成平滑的直流250V电压并输出至全桥逆变电路，全桥逆变电路包括逆变器和修正电路，推挽升压电路的直流250V电压在逆变器中通过修正电路输出稳定的AC135V交流电压。An emergency output circuit for starting an LED lamp with leakage protection, which is characterized in that it includes a charging circuit, a push-pull boost circuit provided with a PWM pulse generator and a full-bridge inverter circuit, and the charging circuit is connected to the PWM pulse generator The PWM pulse generator includes a PWM chip. When the control terminal detects a power failure state, it immediately outputs a high level to the PWM chip. The PWM chip outputs a complementary driving PWM rectangular wave with adjustable dead time through two output pins. Push-pull boost circuit; the rectangular wave is boosted and rectified into a smooth DC 250V voltage in the push-pull boost circuit and output to the full-bridge inverter circuit. The full-bridge inverter circuit includes an inverter and a correction circuit. Push-pull boost The DC 250V voltage of the circuit outputs a stable AC135V AC voltage through the correction circuit in the inverter.
  2. 根据权利要求1所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，逆变器包括交替导通的第一NMOS管组和第二NMOS管组，第一NMOS管组包括第一NMOS管和第二NMOS管，第二NMOS管组包括第三NMOS管和第四NMOS管，当第一NMOS管组导通时，电流由直流250V电源正极输出，经过第一NMOS管到带有漏电保护LED灯管的火线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的零线，再到第二NMOS管回到电源负极；当第二NMOS管组导通时，电流由直流250V电源正极输出，经过第三NMOS管到带有漏电保护LED灯管的零线、带有漏电保护LED灯管内部驱动电源、带有漏电保护LED灯管的火线，再到第四NMOS管回到电源负极。The emergency output circuit for starting LED lamps with leakage protection according to claim 1, wherein the inverter includes a first NMOS tube group and a second NMOS tube group that are alternately conducted, and the first NMOS tube group Including the first NMOS tube and the second NMOS tube, the second NMOS tube group includes the third NMOS tube and the fourth NMOS tube, when the first NMOS tube group is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the first NMOS tube To the live line of the LED tube with leakage protection, the internal drive power of the LED tube with leakage protection, the neutral line of the LED tube with leakage protection, and then to the second NMOS tube back to the negative pole of the power supply; when the second NMOS tube group When it is turned on, the current is output from the positive pole of the DC 250V power supply, and passes through the third NMOS tube to the neutral wire of the LED lamp with leakage protection, the internal driving power of the LED lamp with leakage protection, and the live wire of the LED lamp with leakage protection. Then the fourth NMOS tube returns to the negative pole of the power supply.
  3. 根据权利要求1所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，修正电路包括第一分压单元、时间补偿单元和内部运算放大器芯片，250V直流电压经第一分压单元分压后，将时间补偿单元作为时间补偿到内部运算放大器芯片的第一输入端进行处理。The emergency output circuit for starting LED lamps with leakage protection according to claim 1, wherein the correction circuit includes a first voltage divider unit, a time compensation unit and an internal operational amplifier chip, and the 250V DC voltage is passed through the first divider After the pressure unit divides the voltage, the time compensation unit is used as the time compensation to the first input terminal of the internal operational amplifier chip for processing.
  4. 根据权利要求3所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，修正电路还包括第二分压单元，第二分压单元将输出到修正电路的一个预设电压进行分压后输入至内部运算放大器芯片的第二输入端。The emergency output circuit for starting LED lamps with leakage protection according to claim 3, wherein the correction circuit further includes a second voltage dividing unit, and the second voltage dividing unit outputs a preset voltage to the correction circuit After the voltage is divided, it is input to the second input terminal of the internal operational amplifier chip.
  5. 根据权利要求3所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，在内部运算放大器芯片的输入引脚与补偿引脚之间连接第一电阻和第一电容作为环路补偿，调节第一电阻和第一电容的参数使修正电路输出的矩形波缓慢展开。According to claim 3, the emergency output circuit used to start the LED lamp with leakage protection is characterized in that, the first resistor and the first capacitor are connected between the input pin and the compensation pin of the internal operational amplifier chip as a loop circuit compensation, adjusting the parameters of the first resistor and the first capacitor so that the rectangular wave output by the correction circuit expands slowly.
  6. 根据权利要求1所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，推挽升压电路包括变压器和全桥整流电路，带有死区时间可调的互补驱动PWM矩形波经变压器进行升压，并且在全桥整流电路中整流成250V直流电压。The emergency output circuit for starting LED lamps with leakage protection according to claim 1, characterized in that the push-pull boost circuit includes a transformer and a full-bridge rectifier circuit, with a complementary drive PWM rectangular with adjustable dead time The wave is boosted by a transformer and rectified into a 250V DC voltage in a full-bridge rectifier circuit.
  7. 根据权利要求6所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，推挽升压电路还包括滤波电容，滤波电容与全桥整流电路并联，250V直流电压在滤波电容滤波成平滑的250V直流电压。The emergency output circuit for starting LED lamps with leakage protection according to claim 6, wherein the push-pull boost circuit also includes a filter capacitor, the filter capacitor is connected in parallel with the full-bridge rectifier circuit, and the 250V DC voltage is applied to the filter capacitor Filtered into a smooth 250V DC voltage.
  8. 根据权利要求1所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，当控制端检测到停电状态时，立即输出高电平至PWM芯片的软启动端脚，使软启动端脚的电压缓慢上升至5V。The emergency output circuit for starting LED lamps with leakage protection according to claim 1, characterized in that, when the control terminal detects a power failure state, it immediately outputs a high level to the soft start pin of the PWM chip, so that the soft The voltage at the start pin rises slowly to 5V.
  9. 根据权利要求1所述的用于启动具有漏电保护LED灯管的应急输出电路，其特征在于，当控制端检测到市电状态时，输出低电平至PWM芯片的软启动端脚，PWM芯片的两输出端引脚均输出低电平。The emergency output circuit for starting LED lamps with leakage protection according to claim 1, characterized in that, when the control terminal detects the state of mains power, it outputs a low level to the soft start pin of the PWM chip, and the PWM chip Both output pins output low level.
PCT/CN2021/109565 2021-07-30 2021-07-30 Emergency output circuit used for starting led lamp tube having leakage protection WO2023004739A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760166A (en) * 2023-06-05 2023-09-15 广东振辉消防科技有限公司 Special emergency power supply for integrated buck-boost lamp

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US20170201170A1 (en) * 2017-03-26 2017-07-13 Ahmed Fayez Abu-Hajar Method for generating highly efficient harmonics free dc to ac inverters
CN207677500U (en) * 2017-09-18 2018-07-31 厦门奥德隆自动化设备有限公司 A kind of elevator emergency power supply
CN208971208U (en) * 2018-11-12 2019-06-11 深圳市创世达实业有限公司 Accumulation energy type inversion mobile power source

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170201170A1 (en) * 2017-03-26 2017-07-13 Ahmed Fayez Abu-Hajar Method for generating highly efficient harmonics free dc to ac inverters
CN207677500U (en) * 2017-09-18 2018-07-31 厦门奥德隆自动化设备有限公司 A kind of elevator emergency power supply
CN208971208U (en) * 2018-11-12 2019-06-11 深圳市创世达实业有限公司 Accumulation energy type inversion mobile power source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760166A (en) * 2023-06-05 2023-09-15 广东振辉消防科技有限公司 Special emergency power supply for integrated buck-boost lamp
CN116760166B (en) * 2023-06-05 2024-01-19 广东振辉消防科技有限公司 Special emergency power supply for integrated buck-boost lamp

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