WO2009065337A1 - Interrupteur d'alimentation en courant continu et son procédé de mise en œuvre - Google Patents

Interrupteur d'alimentation en courant continu et son procédé de mise en œuvre Download PDF

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Publication number
WO2009065337A1
WO2009065337A1 PCT/CN2008/072770 CN2008072770W WO2009065337A1 WO 2009065337 A1 WO2009065337 A1 WO 2009065337A1 CN 2008072770 W CN2008072770 W CN 2008072770W WO 2009065337 A1 WO2009065337 A1 WO 2009065337A1
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WO
WIPO (PCT)
Prior art keywords
voltage
power switch
module
control module
power
Prior art date
Application number
PCT/CN2008/072770
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English (en)
Chinese (zh)
Inventor
Huafu Li
Jigao Chen
Libin Ma
Original Assignee
Chengdu Huawei Symantec Technologies Co.,Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Huawei Symantec Technologies Co.,Ltd. filed Critical Chengdu Huawei Symantec Technologies Co.,Ltd.
Publication of WO2009065337A1 publication Critical patent/WO2009065337A1/fr

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Classifications

    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents
    • H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
    • H03K17/162—Modifications for eliminating interference voltages or currents in field-effect transistor switches without feedback from the output circuit to the control circuit
    • H03K17/163—Soft switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches

Definitions

  • the invention relates to a power switch technology, and in particular to a DC power switch and a method for implementing the same. Background technique
  • switches widely used in DC power supply devices are conventional mechanical switches and electromagnetic switches.
  • Electromagnetic power switches have the following disadvantages:
  • the contact Since the contact is turned on or off by the electromagnetic force, the contact will generate an arc at the moment of closing. Over time, the electric contact resistance will gradually increase, resulting in a decrease in the reliability of the switch. The life is affected; the electromagnetic power switch cannot realize the function of power supply under-detection and automatic shutdown of the output voltage. That is, the performance of the electromagnetic power switch is low.
  • the size of the switch is large and should not be used as a high-power power switch.
  • the embodiment of the invention provides a DC power switch, which can improve the performance of the DC power switch.
  • Embodiments of the present invention provide a method for implementing a DC power switch, which can improve DC switch performance.
  • a DC power switch includes a voltage abnormality control module, a delay and ramp control module, and a power switch module;
  • the voltage abnormality control module is configured to: when detecting that the voltage of the input DC power switch is normal, transmitting a signal of the power-on switch module to the delay and the ramp control module; and detecting that the voltage of the input DC power switch is abnormal, transmitting Disconnecting the signal of the power switch module to the delay and ramp control module; the delay and ramp control module is configured to receive the signal of the power switch module, delay the conduction of the power switch module, and pass the The power switch module controls the voltage of the output DC power switch to ramp up or down to a normal voltage; receiving the signal of the disconnected power switch module, and controlling the power switch module to be turned off;
  • the power switch module is configured to provide a voltage of the input DC power switch to the power supply device under the control of the delay and ramp control module, or disconnect the voltage of the input DC power switch provided to the power supply device.
  • a method for implementing a DC power switch comprising: When detecting that the voltage of the input DC power switch is normal, the voltage of the input DC power switch supplied to the power supply device is delayed, and the voltage is ramped up or down to a normal voltage; when the voltage of the input DC power switch is abnormal, the disconnection is provided. The voltage of the input DC power switch to the power supply unit.
  • the embodiment of the present invention detects and controls the voltage of the input DC power switch, supplies power to the power supply device when the voltage of the input DC power switch is normal, and outputs the voltage from the DC power switch to the power supply device. Delay and ramp processing are performed to achieve constant current and ramp output voltages to the power supply unit so that arcing does not occur as in the prior art.
  • the DC power switch of the embodiment of the present invention improves the performance of the electronic switch.
  • FIG. 1 is a schematic structural diagram of a DC power switch according to an embodiment of the present invention.
  • FIG. 2 is a circuit diagram 1 of a DC power switch according to an embodiment of the present invention.
  • FIG. 3 is a circuit diagram of the overvoltage detecting module 111 of FIG. 2;
  • FIG. 4 is a circuit diagram of the voltage abnormal shutdown output control module 112 and the manual control switch module 1 30 of FIG. 2;
  • FIG. 5 is a circuit diagram of the delay and ramp control module 120 and the power switch module 140 of FIG. 2;
  • FIG. 6 is a circuit diagram of the output voltage normal display module 150 of FIG.
  • FIG. 7 is a circuit diagram 2 of a DC power switch according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a DC power switch according to an embodiment of the present invention.
  • the DC power switch includes a voltage abnormality control module 110, a delay and ramp control module 120, a manual control switch module 130, and a power switch module 140.
  • the voltage abnormality control module 110 is configured to: when detecting that the voltage of the input DC power switch is normal, transmit a signal of the power-on switch module to the delay and ramp control module 120, and detect that the voltage of the input DC power switch is abnormal, and transmit The signal of the power switch module is turned off to the delay and ramp control module 120.
  • the voltage abnormality control module 110 includes an overvoltage and undervoltage detection module 111 and a voltage abnormality shutdown output control module 112.
  • the over-voltage detecting module 111 is configured to perform over-voltage detection on the voltage of the input DC power switch, and detect an abnormality signal indicating that the voltage abnormality is abnormal when the voltage is normal.
  • the voltage abnormality closing output control module 112 is configured to transmit a signal of the power-on switching module to the delay and ramp control module 120 according to the received indication signal that the voltage transmitted by the over-voltage detecting module 111 is normal; according to the received The signal of the power switch module is transmitted to the delay and ramp control module 120 by the indication signal of the abnormal voltage transmitted by the overvoltage detection module 111.
  • the DC power input of the DC power switch can also be used as an input to the voltage abnormal shutdown output control module 112 to provide power to the voltage abnormal shutdown output control module 112.
  • the voltage abnormality control module 110 performs over-voltage detection on the voltage of the input DC power switch, thereby avoiding abnormality of the input voltage (too high or too low), causing abnormal operation of the power supply system, and even causing damage to the DC power switch or the power supply device, and safety occurs. Accident or hidden danger.
  • the delay and ramp control module 120 is disposed between the voltage abnormal shutdown output control module 112 and the power switch module 140, and is used for delaying power when the receiving voltage abnormally turns off the signal of the conduction power switch module transmitted by the output control module 112.
  • the switching module 140 is turned on, and the voltage of the output DC power switch is controlled to rise or fall to a normal voltage by the power switch module 140; when the receiving voltage abnormally turns off the signal of the power switch module transmitted by the output control module 112, the power switch is controlled. Mode Block 140 is broken.
  • the DC power input of the DC power switch can also be used as a delay and ramp control module.
  • the input of 120 provides power to the delay and ramp control module 120.
  • the delay and ramp control module 120 can delay the conduction of the power switch module 140 and ramp up or down the voltage supplied by the power switch module 141 to the power supply device by controlling the power switch module 140.
  • the process of ramping up or down the voltage supplied to the power supply device that is, the process from the start of the power switch module 140 to the full turn-on. In this way, a constant power output starting current or current limiting starting function is realized, which avoids a large surge starting current phenomenon under a large capacitive load condition, and does not generate an arc phenomenon, thereby improving the life of the switching device.
  • the manual control switch module 1 30 is connected to the voltage abnormality control module 110, specifically, to the voltage abnormal shutdown output control module 112, and is configured to detect when the voltage abnormality control module 110 detects that the voltage of the input DC power switch is abnormal.
  • the control voltage abnormality control module 110 is in a self-locking state, keeping its output as a signal to open the power switch module, and transmitting it to the power switch module 140 through the delay and ramp control module 120 until the manual control of the switch module 1 30 is manually controlled.
  • the self-locking state of the voltage abnormality control module 112 is released.
  • the manual control switch module 1 30 is optional, and the specific circuit diagram of its implementation can be combined with Figure 4.
  • FIG. 4 when the contact 2 of the manual control switch module 1 30 is in contact with the contact 3, if the voltage abnormality control module 110 detects that the voltage of the input DC power switch is abnormal, the voltage abnormality control module 110 and the manual control switch module 1 30 forms a self-locking loop, so that the voltage abnormality control module 110 is in a self-locking state, and outputs a signal that disconnects the power switch module.
  • the manual control switch of FIG. Module 1 30 can be switched from contact 3 to contact 1. After the voltage of the input DC power switch is normal, the manual control switch module 1 30 can be switched from contact 1 to contact 3. It can be seen that the manual control switch module 1 30 can prevent the power switch module from being repeatedly turned on and off when the voltage of the input DC power switch continuously fluctuates at the undervoltage point or the overvoltage point, thereby causing damage to the DC power switch or the power supply device.
  • a power switch module 140 for providing input under the control of the delay and ramp control module 120
  • the voltage of the DC power switch is supplied to the power supply device, or the voltage of the input DC power switch supplied to the power supply device is turned off.
  • the power switch module 140 can be implemented by using a MOS switch or a triode or the like.
  • the output voltage normal display module 150 is connected to the power switch module 140 for realizing the status display of the DC power switch when the power supply device is normally powered.
  • the output voltage normal display module 150 is optional.
  • the implementation of the DC power switch structure of the embodiment of the present invention is various.
  • the structure shown in FIG. 1 is specifically described by taking the circuit shown in FIG. 2 as an example.
  • the power switch module 140 is implemented by a M0S switch.
  • FIG. 2 is a circuit diagram 1 of a DC power switch according to an embodiment of the present invention.
  • FIG. 2 is a specific implementation circuit corresponding to FIG. 1, and each part of the circuit is specifically referred to FIG. 3 to FIG. 6.
  • FIG. 3 it is a circuit diagram of the over-voltage detecting module 11 1 in FIG. 1.
  • the circuit of the over-voltage detecting module is implemented by using two TL431 (UK U2) and a peripheral resistor, and the peripheral resistor includes R1, R2, R3, R4 and R5.
  • the TL431 is a voltage comparator with a reference voltage with a reference voltage Vref of 2. 5V or 1. 25V. Overvoltage detection is performed by Rl, R2, and U1, and undervoltage detection is performed by R3, R4, and U2.
  • the overvoltage detection point of the input overvoltage detection module circuit is: (1+R1 /R2) X Vref ;
  • the undervoltage detection point of the input overvoltage detection module circuit is: (1+R3/R4) X Vref.
  • FIG. 4 it is a circuit diagram of the voltage abnormality shutdown output control module 112 and the manual control switch module 130 of FIG. 2, which is the output of the circuit of the overvoltage and undervoltage detection module 111.
  • the input of the voltage abnormal shutdown control module 112 is a high level voltage, that is, the power supply voltage of the input DC power switch is abnormal, that is, lower than the undervoltage detection point or higher than the overvoltage detection point
  • the MN OS Q1 is turned on, NPN
  • the transistor Q2 is turned off, the NPN transistor Q3 is turned on
  • the output of the voltage abnormal shutdown output control module 112 is a low level voltage
  • the input of the output control module 112 is a low level voltage, that is, the power supply voltage of the input DC power switch.
  • the normal value that is, the power supply voltage of the input DC power switch is between the undervoltage detection point and the overvoltage detection point, and the output of the voltage abnormality shutdown output control module 112 is a high level voltage. If the manual control switch module SW 2 is connected to the contact 3, if the input of the DC power switch is abnormal voltage at this time, the voltage abnormal shutdown output control module 112 is in the self-locking state, and the voltage abnormal shutdown output control module 112 outputs the low. Level voltage. If the input of the DC power switch becomes a normal voltage afterwards, the voltage abnormal shutdown output control module 112 is still in a self-locking state, and the voltage abnormal shutdown output control module 112 outputs remain low. In this case, the manual control switch module SW is switched from the contact 3 to the contact 1 and then to the contact 2 to release the self-locking.
  • the voltage abnormality turns off the output control module 1 12 input signal and output signal through the diodes Dl, D2 to achieve a logical relationship
  • the capacitor C1 is anti-jitter capacitor, used to ensure the input DC power, see Figure 5, for the delay in Figure 1 Circuit diagram of time and ramp control module 120 and MOS switch. The following describes the shutdown and working conditions of the M0S switch.
  • the M0S switch is turned off.
  • the input of the delay and ramp control module 120 is the output of the voltage abnormality off output control module 112.
  • the PNP transistor of FIG. 5 Q4 is turned on, the voltage of capacitor C2 is discharged through Q4 and R14, the gate-source voltage VGS of the M0S switch is lower than the threshold voltage, the M0S switch is turned off, and the output voltage of the DC power switch is 0.
  • the M0S switch is closed.
  • the PNP transistor Q4 in FIG. 5 is turned off, and the input voltage of the DC power source passes through C2, D3, C3, R19 and the output load.
  • the capacitor constitutes the instantaneous current path, and R19 is the current limiting resistor.
  • the feedback capacitor C3 is much smaller than other capacitors, and the voltage across it reaches the input voltage of the DC power switch quickly.
  • R15 and R16 charge capacitor C2.
  • the gate of M0S switch reaches the conduction threshold voltage Vgh(th)
  • M0S switch Start to turn on, the length of the on-time is determined by the resistors R15, R16 and capacitor C2.
  • the C2 continues to charge so that the M0S switch gate source reaches the platform voltage (Vp lt ), and the feedback capacitor C 3 , the MOS switch source/drain, the delay, and the ramp control module 120 output voltages are at the same voltage.
  • the rate of change is changed; the output voltage of the delay and ramp control module 120 is from 0V to the input voltage value of the DC power switch at a constant voltage change rate; after the delay and the output voltage of the ramp control module 120 reaches the input voltage value of the DC power switch, R15 and R16 continue to charge capacitor C2 to reach the input voltage value of the DC power switch.
  • the on-resistance RDS of the M0S switch is the smallest, the turn-on voltage VDS also reaches the lowest value, and the DC power switch outputs the normal voltage.
  • the magnitude of the feedback capacitor C 3 is determined by the current flowing through the feedback capacitor C 3 , the inrush current allowed by the power supply output of the delay ramp control module 120, and the output load capacitance.
  • the rate of change of the power supply output voltage of the delay and ramp control module 120 is the ratio of the surge current allowed by the power supply output of the delay and ramp control module 120 to the delay and the output load capacitance of the ramp control module 120.
  • FIG. 6 it is a circuit diagram of the output voltage normal display module 150 in FIG. 2 , and the power output voltage normal display circuit is implemented by using an LED LED series current limiting resistor R20 .
  • the operating current of the LED is set to be in the range of 5 ⁇ 10 mA by selecting the series current limiting resistor R20.
  • FIG. 2 shows the DC power switch of Figure 1 taking the DC positive power input DC power switch as an example.
  • the following is a detailed illustration of the DC negative power input DC power switch.
  • 7 is a schematic diagram of a circuit diagram of a DC power switch according to an embodiment of the present invention. Compared with the circuit of FIG. 2, the overvoltage and undervoltage detection module, the voltage abnormality shutdown output control module, the manual control switch module, and the output voltage normal display module respectively similar. Because the input of the DC power switch is a negative power supply at this time, the delay and the specific implementation circuits of the ramp control module and the M0S switch are somewhat different.
  • the M0S switch in Figure 2 is a P-type M0S switch, and the M0S switch in Figure 7 is an N-type M0S switch. .
  • the output power control module transmits the conduction power switch module
  • the power switch module When the signal is delayed, the power switch module is turned on, and the voltage of the output DC power switch is controlled to fall to a normal voltage by the power switch module; when the receiving voltage abnormally turns off the signal of the power switch module transmitted by the output control module, the power is controlled.
  • the switch module is disconnected.
  • DC power switch that can be implemented by the idea of the embodiment of the present invention is not limited to the above-mentioned circuit, and is not listed here.
  • the embodiment of the invention further provides a method for implementing a DC power switch, the method comprising: detecting a voltage delay of an input DC power switch provided to a power supply device when the voltage of the input DC power switch is normal, and ramping up or Drop to normal voltage; When detecting that the voltage of the input DC power switch is abnormal, disconnect the voltage of the input DC power switch supplied to the power supply device.
  • the method includes: displaying a state when the DC power switch supplies the power supply device with normal power.
  • the DC power switch of the embodiment of the invention detects and controls the voltage of the input DC power switch, supplies power to the power supply device when the voltage of the input DC power switch is normal, and performs voltage output from the DC power switch to the power supply device. Delay and ramp processing, to achieve constant current and ramp output voltage to the power supply equipment, so that arcing does not occur as in the prior art. Thus, the DC power switch of the embodiment of the present invention improves the performance of the electronic switch.
  • the solution of the embodiment of the present invention can adopt a conventional and general-purpose device design, and the implementation is simple.
  • the DC power switch of the embodiment of the present invention may be in the circuit design of the relevant functional requirements in the form of the module circuit, and used in combination with the related equipment; or the small module components may appear in an independent form in the relevant requirements. In the device.
  • the DC power switch of the embodiment of the present invention further includes the following effects:
  • the cost of the DC power switch is mainly reflected in the cost of two common-purpose devices TL431 and power M0S tubes, while the cost of two common-purpose devices TL431 and power MOSFETs is low, thus reducing the cost.
  • the MOS switch When the power switch module of the DC power switch is the MOS switch, the MOS switch is only connected in series in the main circuit of the DC power switch, which is the only energy consuming component in the DC power switch. Therefore, the DC power switch of the embodiment of the present invention
  • the volume is mainly reflected in the M0S switch, and the internal resistance of the power M0S switch tube is small when the switch is closed, so the volume of the DC power switch is small. In this way, the volume of the DC power switch is reduced, and it is also easy to install, and can be made into a high-power power switch.

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  • Dc-Dc Converters (AREA)

Abstract

L'invention porte sur un interrupteur d'alimentation en courant continu et sur son procédé de mise en œuvre qui comprennent un module de contrôle d'anormalité de tension (110), un module de commande retard et pente (120), et un module interrupteur d'alimentation (140). Le module de contrôle d'anormalité de tension (110) est utilisé pour transmettre un signal pour activer le module interrupteur d'alimentation (140) ou un signal pour désactiver le module interrupteur d'alimentation (140) au module de commande retard et pente (120). Le module de commande retard et pente (120) est utilisé pour retarder l'activation du module interrupteur d'alimentation (140), et pour commander une pente de tension du courant continu de sortie d'interrupteur pour monter ou descendre à une tension normale par le module interrupteur d'alimentation (140). Le module interrupteur d'alimentation (140) est utilisé pour fournir une tension du courant continu d'entrée d'interrupteur à un dispositif d'alimentation électrique, ou pour couper la tension du courant continu d'entrée d'interrupteur fournit au dispositif d'alimentation électrique sous la commande du module de commande retard et pente (120).
PCT/CN2008/072770 2007-10-29 2008-10-21 Interrupteur d'alimentation en courant continu et son procédé de mise en œuvre WO2009065337A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2007101651086A CN100525029C (zh) 2007-10-29 2007-10-29 直流电源开关及其实现方法
CN200710165108.6 2007-10-29

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WO2009065337A1 true WO2009065337A1 (fr) 2009-05-28

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Families Citing this family (8)

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CN100525029C (zh) * 2007-10-29 2009-08-05 成都市华为赛门铁克科技有限公司 直流电源开关及其实现方法
JP6622907B2 (ja) * 2016-04-28 2019-12-18 古野電気株式会社 電源装置、電子機器、および、舶用アプリケーション実行システム
CN107015937B (zh) * 2017-03-27 2019-07-16 西安微电子技术研究所 一种低压高速感性负载驱动电路
CN106961212B (zh) * 2017-03-29 2019-09-20 华为技术有限公司 一种电压转换装置及其控制方法
CN108055028A (zh) * 2018-02-02 2018-05-18 深圳市欧深特信息技术有限公司 一种多功能合一的缓启动可控电源开关
CN110768650A (zh) * 2018-07-27 2020-02-07 台达电子工业股份有限公司 异常电压保护装置及其操作方法
CN108963970B (zh) * 2018-08-20 2020-05-05 奥克斯空调股份有限公司 一种负载保护电路及空调器
CN113114199B (zh) * 2021-05-19 2023-03-24 沃太能源股份有限公司 一种bms电源开关的控制系统及控制方法

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CN101202500A (zh) 2008-06-18

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