CN117411302B - RPDU internal power supply circuit - Google Patents
RPDU internal power supply circuit Download PDFInfo
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- CN117411302B CN117411302B CN202311704929.8A CN202311704929A CN117411302B CN 117411302 B CN117411302 B CN 117411302B CN 202311704929 A CN202311704929 A CN 202311704929A CN 117411302 B CN117411302 B CN 117411302B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
本发明属于配电系统、配电产品电源供电领域，具体涉及一种RPDU内部供电电路。包括：过压保护电路和供电输入控制电路，过压保护电路通过运放实现对供电输入的电压比较，运放的输出控制电源模块是否接通；供电输入控制电路采用处理器和光耦实现对电源模块的冷启动控制。
The present invention belongs to the field of power supply of power distribution system and power distribution product, and specifically relates to an internal power supply circuit of RPDU. It includes: an overvoltage protection circuit and a power supply input control circuit. The overvoltage protection circuit realizes voltage comparison of the power supply input through an operational amplifier, and the output of the operational amplifier controls whether the power supply module is connected; the power supply input control circuit uses a processor and an optical coupler to realize cold start control of the power supply module.
Description
技术领域Technical Field
本发明涉及航空配电系统，属于配电系统、配电产品电源供电领域，具体涉及一种RPDU内部供电电路。The invention relates to an aviation power distribution system, belongs to the field of power distribution systems and power supply of power distribution products, and specifically relates to an RPDU internal power supply circuit.
背景技术Background technique
先进飞机朝着多电全电的方向发展，随着科技的发展和需求的不断提高，飞机用电设备逐渐增多，随之飞机的配电产品也逐渐增多，尤其飞机二次配电系统的配电设备数量的增多对飞机的维护提出了一定的要求。分级到配电设备就要求其具有良好的可维护性。Advanced aircraft are developing towards more electric and fully electric. With the development of science and technology and the continuous improvement of demand, the number of electrical equipment used in aircraft is gradually increasing, and the number of power distribution products in aircraft is also gradually increasing. In particular, the increase in the number of power distribution equipment in the aircraft secondary power distribution system has put forward certain requirements for aircraft maintenance. The power distribution equipment is required to have good maintainability.
RPDU（Remote Power Distribution Unit远程功率配电单元）作为飞机配电产品，其良好的维修性可以有效提高飞机维修效率，更好的保障飞机飞行任务派遣的准时性。飞机的配电系统产品数量多，其为飞机大多数负载供电，飞机维护时针对一个产品的软件维修常常需要维修后配电系统断电再重新上电，并重新进行构型配置检查等工作，不仅耗时，很多正常设备都需要重启。As an aircraft power distribution product, RPDU (Remote Power Distribution Unit) can effectively improve aircraft maintenance efficiency and better ensure the punctuality of aircraft flight mission dispatch due to its good maintainability. There are many aircraft power distribution system products, which provide power for most of the aircraft loads. During aircraft maintenance, software repair of a product often requires the power distribution system to be powered off and then powered on again after maintenance, and re-configuration inspection, etc. This is not only time-consuming, but also requires many normal devices to be restarted.
发明内容Summary of the invention
发明目的：提供一种RPDU内部供电电路，实现产品供电输入过压时提供过压保护功能，电压恢复后自动连接供电输入。Purpose of the invention: To provide an RPDU internal power supply circuit to provide overvoltage protection when the product power input is overvoltage, and automatically connect the power input after the voltage is restored.
技术方案：Technical solutions:
一种RPDU内部供电电路，包括：过压保护电路和供电输入控制电路，过压保护电路通过运放实现对供电输入的电压比较，运放的输出控制电源模块是否接通；供电输入控制电路采用处理器和光耦实现对电源模块的冷启动控制，其中，过压保护电路包括：比较器M1、电阻R1、电阻R2、电阻R3、电阻R4、电阻R5、电阻R6、电压基准U3、MOS管Q1，其中，电阻R1一端与电源模块的正输入端连接；电阻R1的另一端与比较器M1的反相输入端以及电阻R6的一端连接；电阻R2的一端与电压基准的输出端连接，电阻R2的另一端与比较器M1的同相输入端连接；电阻R3的一端与电源模块的正输入端连接，电阻R3的另一端与电压基准的输入端、电阻R4的一端以及比较器M1的供电正端连接；电阻R5一端与比较器M1的输出端连接，电阻R5另一端与MOS管Q1的栅极连接；MOS管Q1的源极与电源模块的负输入端连接；电阻R6的另一端、比较器M1的供电负端、电阻R4另一端、MOS管Q1的漏极接地。An RPDU internal power supply circuit includes: an overvoltage protection circuit and a power supply input control circuit, wherein the overvoltage protection circuit realizes voltage comparison of the power supply input through an operational amplifier, and the output of the operational amplifier controls whether a power supply module is connected; the power supply input control circuit uses a processor and an optical coupler to realize cold start control of the power supply module, wherein the overvoltage protection circuit includes: a comparator M1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a voltage reference U3, and a MOS tube Q1, wherein one end of the resistor R1 is connected to the positive input end of the power supply module; the other end of the resistor R1 is connected to the inverting input end of the comparator M1 and the resistor R 6; one end of the resistor R2 is connected to the output end of the voltage reference, and the other end of the resistor R2 is connected to the non-inverting input end of the comparator M1; one end of the resistor R3 is connected to the positive input end of the power module, and the other end of the resistor R3 is connected to the input end of the voltage reference, one end of the resistor R4 and the positive power supply end of the comparator M1; one end of the resistor R5 is connected to the output end of the comparator M1, and the other end of the resistor R5 is connected to the gate of the MOS tube Q1; the source of the MOS tube Q1 is connected to the negative input end of the power module; the other end of the resistor R6, the negative power supply end of the comparator M1, the other end of the resistor R4, and the drain of the MOS tube Q1 are grounded.
进一步地，供电输入控制电路包括光耦U4和处理器，其中，光耦U4的输入正端与电压基准的输出端连接，光耦U4的输入负端与处理器的控制端连接，光耦U4的输出正端与电阻R2的另一端以及比较器M1的同相输入端连接；光耦U4的输出负端接地；电源模块的输出正端与处理器的供电输入正端连接，电源模块的输出负端和处理器的供电输入负端连接。Furthermore, the power supply input control circuit includes an optocoupler U4 and a processor, wherein the positive input terminal of the optocoupler U4 is connected to the output terminal of the voltage reference, the negative input terminal of the optocoupler U4 is connected to the control terminal of the processor, the positive output terminal of the optocoupler U4 is connected to the other end of the resistor R2 and the in-phase input terminal of the comparator M1; the negative output terminal of the optocoupler U4 is grounded; the positive output terminal of the power supply module is connected to the positive power supply input terminal of the processor, and the negative output terminal of the power supply module is connected to the negative power supply input terminal of the processor.
进一步地，当产品正常工作时，处理器输出高，当产品需要冷启动时，处理器输出为低电平。Furthermore, when the product is operating normally, the processor output is high, and when the product needs a cold start, the processor output is low.
进一步地，比较器M1为轨对轨运算放大器。Furthermore, the comparator M1 is a rail-to-rail operational amplifier.
进一步地，MOS管Q1为N沟道MOS管。Furthermore, the MOS transistor Q1 is an N-channel MOS transistor.
进一步地，光耦U4为单通道光耦。Furthermore, the optocoupler U4 is a single-channel optocoupler.
进一步地，电阻R3和电阻R4对电源模块输入电压的分压小于电压基准的正常输入电压的最大值。Furthermore, the voltage divided by the resistor R3 and the resistor R4 on the input voltage of the power module is smaller than the maximum value of the normal input voltage of the voltage reference.
进一步地，电阻R1和电阻R6对电源模块输入电压的分压用于确定过压保护点。Furthermore, the voltage division of the input voltage of the power module by the resistor R1 and the resistor R6 is used to determine the overvoltage protection point.
有益效果：Beneficial effects:
本发明通过电压比较电路实现产品供电输入的过压保护功能，通过处理器和光耦实现供电输入源的接通与断开功能。不仅保证了用电设备免受过电压的影响，又实现了产品自控实现冷启动，提高了产品的维修性，同时提高了系统的维修性。The present invention realizes the overvoltage protection function of the product power input through the voltage comparison circuit, and realizes the connection and disconnection function of the power input source through the processor and the optical coupler. It not only ensures that the electrical equipment is protected from the influence of overvoltage, but also realizes the product self-control to realize cold start, improves the maintainability of the product, and at the same time improves the maintainability of the system.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的RPDU内部供电电路原理图。FIG. 1 is a schematic diagram of an internal power supply circuit of an RPDU of the present invention.
具体实施方式Detailed ways
为提高配电系统维修性，本发明将每个配电产品单独设计为可以自控冷启动和过压保护，这样不仅单个产品需要冷启动时不会影响其他产品正常运行，某些产品存在过压故障时可以自行保护，同样不会影响其他配电设备，具有一定的故障隔离作用。故提出了一种适用于RPDU内部供电具有过压保护功能和自控制冷启动的电路，不仅保证了用电设备免受过电压的影响，又实现了产品自控实现冷启动，避免了因为某一台产品的掉电需求而导致整机断电重启，节省了维护时间，提高可系统的维修性。In order to improve the maintainability of the power distribution system, the present invention designs each power distribution product to be able to self-control cold start and overvoltage protection. In this way, not only will the normal operation of other products not be affected when a single product needs cold start, but certain products can protect themselves when there is an overvoltage fault, and will not affect other power distribution equipment, which has a certain fault isolation effect. Therefore, a circuit with overvoltage protection function and self-control cold start suitable for RPDU internal power supply is proposed, which not only ensures that the electrical equipment is protected from the influence of overvoltage, but also realizes the self-control of the product to realize cold start, avoids the whole machine power off and restart due to the power loss demand of a certain product, saves maintenance time, and improves the maintainability of the system.
一种适用于RPDU内部供电具有过压保护功能和自控制冷启动的电路，包括过压保护电路、供电输入控制电路。过压保护电路用于当输入电压异常而超过规定的电压输入范围时，切断输入电源，当输入电压恢复到规定的输入电压范围之内时接通供电输入，确保后级电路不会受到输入过压带来的影响。当处理器检测到用电设备需要断电重启时，通过控制低压开关来切断供电输入源，当用电设备断电后自动接通供电输入源，实现产品冷启动，确保后级用电设备快速恢复正常供电。该电路不仅保证了用电设备免受过电压的影响，又实现了产品自控实现冷启动，避免了因为某一台产品的掉电需求而导致整机断电重启，节省了维护时间，可提高系统的维修性。A circuit suitable for RPDU internal power supply with overvoltage protection function and self-controlled cold start, including an overvoltage protection circuit and a power supply input control circuit. The overvoltage protection circuit is used to cut off the input power when the input voltage is abnormal and exceeds the specified voltage input range, and connect the power input when the input voltage returns to the specified input voltage range, to ensure that the subsequent circuit will not be affected by the input overvoltage. When the processor detects that the power-consuming equipment needs to be powered off and restarted, it cuts off the power input source by controlling the low-voltage switch, and automatically connects the power input source when the power-consuming equipment is powered off, to achieve product cold start, and ensure that the subsequent power-consuming equipment quickly restores normal power supply. This circuit not only ensures that the power-consuming equipment is protected from the influence of overvoltage, but also realizes the self-control of the product to achieve cold start, avoiding the power off and restart of the entire machine due to the power-off demand of a certain product, saving maintenance time, and improving the maintainability of the system.
本发明的一种RPDU内部供电电路，通过电压比较电路实现产品供电输入的过压保护功能，通过处理器和光耦实现供电输入源的接通与断开功能。不仅保证了用电设备免受过电压的影响，又实现了产品自控实现冷启动，提高了系统的维修性。The RPDU internal power supply circuit of the present invention realizes the overvoltage protection function of the product power input through the voltage comparison circuit, and realizes the connection and disconnection function of the power input source through the processor and the optical coupler. It not only ensures that the electrical equipment is protected from the influence of overvoltage, but also realizes the product self-control to realize cold start, and improves the maintainability of the system.
一种适用于RPDU内部供电具有过压保护功能和自控制冷启动电路包括过压保护和供电输入控制两部分，过压保护通过运放实现对供电输入的电压比较功能，运放的输出控制供电输入源是否接通；处理器和光耦实现对供电输入源的自控制，当需要冷启动时，无需外部手动断电即可实现产品的冷启动。A circuit with overvoltage protection function and self-controlled cold start function suitable for RPDU internal power supply includes overvoltage protection and power supply input control. The overvoltage protection realizes the voltage comparison function of the power supply input through an operational amplifier, and the output of the operational amplifier controls whether the power supply input source is connected; the processor and the optical coupler realize self-control of the power supply input source. When a cold start is required, the cold start of the product can be realized without external manual power off.
过压保护的设计采用运放作为比较器搭建电路，其中运放的输入分别为产品供电输入和基准电压源（电压输入范围更广），运放的输出连接MOS管的驱动端，通过控制MOS管实现对产品供电输入的通断控制。其中基准电压源的供电输入范围大于产品供电输入正常要求的范围，MOS管的D和S极连接产品供电输入的地。The overvoltage protection design uses an op amp as a comparator to build a circuit, where the op amp inputs are the product power input and the reference voltage source (voltage input range is wider), and the op amp output is connected to the driving end of the MOS tube, and the on-off control of the product power input is achieved by controlling the MOS tube. The power input range of the reference voltage source is larger than the normal range required for the product power input, and the D and S poles of the MOS tube are connected to the ground of the product power input.
产品正常供电电压范围为0-V1（伏特），基准电压源供电输入范围为0-V2（伏特），V2应大于V1（可用电阻分压来减小对电压输入范围的要求）。基准电压源的供电和运放的供电均通过电阻网络将产品的供电输入分压来实现，可以减小对基准电压源和运放供电输入范围的要求。The normal supply voltage range of the product is 0-V1 (volts), and the reference voltage source supply input range is 0-V2 (volts). V2 should be greater than V1 (resistance voltage division can be used to reduce the voltage input range requirements). The power supply of the reference voltage source and the power supply of the operational amplifier are both achieved by dividing the product's power supply input voltage through a resistor network, which can reduce the requirements for the reference voltage source and the operational amplifier power supply input range.
处理器和光耦的组合控制为：处理器的控制端连接光耦的输入负端。当产品正常工作时，处理器输出高电平，当产品需要冷启动时，处理器输出低电平。The combined control of the processor and the optocoupler is: the control end of the processor is connected to the negative input end of the optocoupler. When the product is working normally, the processor outputs a high level, and when the product needs a cold start, the processor outputs a low level.
下面结合附图和具体实施例对本发明进行详细说明。The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
参看图1中电路图，其中运放M1作为比较器，M1的3脚为电压基准电压，当2脚电压小于3脚电压时，运放输出电压V3，使MOS管Q1导通，使得MOS管的2脚和3脚接通，从而使电源模块U1的2脚接地，电源模块U1输出电压为Vout1。Refer to the circuit diagram in Figure 1, in which the operational amplifier M1 is used as a comparator, and the pin 3 of M1 is the voltage reference voltage. When the voltage at pin 2 is less than the voltage at pin 3, the operational amplifier outputs a voltage V3, turning on the MOS tube Q1, so that pins 2 and 3 of the MOS tube are connected, thereby grounding pin 2 of the power module U1, and the output voltage of the power module U1 is Vout1.
当2脚电压大于3脚电压时，运放输出电压为0，使MOS管Q1关断，使得MOS管的2脚和3脚断开，从而使电源模块U1的2脚与地断开，电源模块U1输出电压为0，产品由于过压而断电。When the voltage at pin 2 is greater than the voltage at pin 3, the output voltage of the op amp is 0, turning off the MOS tube Q1, disconnecting pins 2 and 3 of the MOS tube, thereby disconnecting pin 2 of the power module U1 from the ground. The output voltage of the power module U1 is 0, and the product is powered off due to overvoltage.
当电路正常供电时，处理器U2的输出引脚CTRL输出高电压时，隔离器件U4的3脚和4脚断开，使得运放M1的3脚为基准电压，保证正常供电；而当处理器U2的3引脚CTRL电压值为0时，隔离器件U4的1脚和2脚之间存在电压差，使得隔离器件U4的3脚和4脚接通，从而运放M1的3脚电压为0，其1脚输出电压为0，使得MOS管Q1的2脚和3脚断开，此时电源模块U1的2脚与PGND断开，电源模块U1无输出，产品断电；产品断电后CTRL为高阻抗状态，使得隔离器件U4的3脚和4脚断开，此时运放M1的3脚为基准电压，1脚输出高电平V3，MOS管Q1的2脚和3脚接通，使得电源模块U1的2脚接地，3脚输出电源模块转换后的电压Vout1，确保产品正常供电。When the circuit is powered normally, when the output pin CTRL of the processor U2 outputs a high voltage, the 3rd and 4th pins of the isolation device U4 are disconnected, so that the 3rd pin of the operational amplifier M1 is the reference voltage, ensuring normal power supply; and when the CTRL voltage value of the 3rd pin of the processor U2 is 0, there is a voltage difference between the 1st and 2nd pins of the isolation device U4, so that the 3rd and 4th pins of the isolation device U4 are connected, so that the voltage of the 3rd pin of the operational amplifier M1 is 0, and the output voltage of its 1st pin is 0, so that the 2nd and 3rd pins of the MOS tube Q1 are disconnected, and at this time, the 2nd pin of the power module U1 is disconnected from PGND, the power module U1 has no output, and the product is powered off; after the product is powered off, CTRL is in a high impedance state, so that the 3rd and 4th pins of the isolation device U4 are disconnected, and at this time, the 3rd pin of the operational amplifier M1 is the reference voltage, the 1st pin outputs a high level V3, the 2nd and 3rd pins of the MOS tube Q1 are connected, so that the 2nd pin of the power module U1 is grounded, and the 3rd pin outputs the voltage Vout1 converted by the power module, ensuring normal power supply of the product.
本发明的RPDU内部供电电路，可实现产品供电输入过压时提供过压保护功能，电压恢复后自动连接供电输入。当产品内部需要冷启动时可以通过处理器控制切断供电输入源，随后自动连接实现产品冷启动功能，以进行必要的自检，无需全机断电，提高了产品维修性。The RPDU internal power supply circuit of the present invention can provide overvoltage protection when the product power input is overvoltage, and automatically connect the power input after the voltage is restored. When the product needs to be cold-started internally, the power input source can be cut off through processor control, and then the product cold-start function can be automatically connected to perform necessary self-checks without powering off the entire machine, thereby improving product maintainability.
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