CN113036736A - Output circuit structure with overcurrent and overvoltage protection and self-checking functions - Google Patents
Output circuit structure with overcurrent and overvoltage protection and self-checking functions Download PDFInfo
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- CN113036736A CN113036736A CN201911252042.3A CN201911252042A CN113036736A CN 113036736 A CN113036736 A CN 113036736A CN 201911252042 A CN201911252042 A CN 201911252042A CN 113036736 A CN113036736 A CN 113036736A
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- overvoltage protection
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- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000005669 field effect Effects 0.000 description 10
- 239000003985 ceramic capacitor Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Emergency Protection Circuit Devices (AREA)
Abstract
本发明公开一种具有过流过压保护以及自检功能的输出电路结构，包含有，过流过压保护模块、控制模块、监测模块、输出模块及处理器模块，所述过流过压保护模块用于对输入以及输出电压进行过压过流保护并对所述控制模块输出电压，所述控制模块用于根据所述处理器模块输出控制信号控制所述过流过压保护模块输出的电压输出，所述监控模块用于将所述控制模块输出电压经过处理后输出给所述处理器模块进行BIT检测，所述输出模块用于将所述控制模块的输出电压通过防反二极管保护后输出。本发明的有益效果：实现产品输出电压的过流过压保护功能，并对输出电压进行BIT检测，提高产品的可靠性，降低产品的故障发生率，并有效地对输出电压进行检测。
The invention discloses an output circuit structure with overcurrent and overvoltage protection and self-checking functions, comprising an overcurrent and overvoltage protection module, a control module, a monitoring module, an output module and a processor module. The module is used to perform over-voltage and over-current protection on the input and output voltage and output the voltage to the control module, and the control module is used to control the voltage output by the over-current and over-voltage protection module according to the control signal output by the processor module Output, the monitoring module is used to process the output voltage of the control module and output it to the processor module for BIT detection, and the output module is used to output the output voltage of the control module after being protected by an anti-reverse diode . The beneficial effects of the invention are: realize the overcurrent and overvoltage protection function of the output voltage of the product, and perform BIT detection on the output voltage, improve the reliability of the product, reduce the failure rate of the product, and effectively detect the output voltage.
Description
Technical Field
The invention relates to the field of voltage and current protection, in particular to an output circuit structure with overcurrent and overvoltage protection and self-checking functions.
Background
With the progress and development of science and technology, the requirements on the safety quality of power supply equipment on an airplane are higher and higher, and the requirements on monitoring and detection of the power supply equipment are also higher and higher. In the existing product, because the output voltage is not subjected to overcurrent and overvoltage protection design, and the harshness of the power supply environment on the airplane is added, the product is often burnt out due to overcurrent and overvoltage due to factors such as external short circuit or peak, the reliability of the product is reduced, and the product quality faces severe examination.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an output circuit structure with overcurrent and overvoltage protection and self-checking functions.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an output circuit structure with overcurrent and overvoltage protection and self-checking function includes, overcurrent and overvoltage protection module, control module, monitoring module, output module and processor module, overcurrent and overvoltage protection module is used for carrying out the excessive pressure and overcurrent protection and right to input and output voltage control module output voltage, control module is used for the basis processor module output control signal control the voltage output of overcurrent and overvoltage protection module output, monitoring module be used for with control module output voltage exports after handling for processor module carries out BIT and detects, output module is used for with control module's output voltage exports after protecting through preventing reverse diode.
As a preferred scheme of an output circuit structure with overcurrent and overvoltage protection and self-checking functions, the processor module is configured to output a control signal to the control module, collect a BIT detection signal of the monitoring module, and output a fault code to the outside through a 422 bus.
Compared with the prior art, the invention has the beneficial effects that: the overcurrent and overvoltage protection function of the output voltage of the product is realized, BIT detection is carried out on the output voltage, the reliability of the product is improved, the fault occurrence rate of the product is reduced, and the output voltage is effectively detected.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic circuit diagram according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, an output circuit structure with overcurrent and overvoltage protection and self-test functions is shown.
The method mainly comprises the following steps:
1. the over-current and over-voltage protection module (XC 7388BAC chip is adopted in the embodiment). The leading-out terminals IN (leading-out terminal numbers 10, 11, 12, 13 and 14) of the U1 chip are power input ports, are connected with an input voltage VCC and are grounded through the ceramic capacitor C1. And the leading-out terminal EN (leading-out terminal number 9) of the U1 chip is an enabling control pin and is connected with an input voltage VCC. The leading-out terminal OVP (leading-out terminal number 8) of the U1 chip is used for setting a pin for inputting an overvoltage protection point, is connected into the divider resistors R1 and R2 to play a role of input terminal overvoltage protection, and is grounded through the ceramic capacitor C2. The leading-out terminal SS (leading-out terminal number 7) of the U1 chip is grounded through the ceramic capacitor C3 and is used for adjusting the soft start time. The terminals OUT ( terminal numbers 1, 2, 16, 17 and 18) of the U1 chip are power output terminals and are grounded through the ceramic capacitor C6 and the transient suppression diode. The leading-out terminal VCP (leading-out terminal number 3) of the U1 chip is an output clamping voltage setting pin, is connected to the voltage dividing resistors R4 and R5, and is grounded through the ceramic capacitor C5. The lead-out terminal ILMT (lead-out terminal number 6) of the U1 chip is a current-limiting point setting pin, is grounded through the current-limiting resistor R3, and is grounded through the ceramic capacitor C4. The terminals GND (terminals No. 4, 5, 19) of the U1 chip are grounded. The transient suppression diode D1 is connected between the output end and the input end of the U1 chip and the U1 chip in parallel.
2. The control module is connected with the output end of the over-current and over-voltage protection module through an S end of the P-channel MOS field effect transistor Qa1, the resistor R7 is connected between an S end and a G end of the P-channel MOS field effect transistor Qa1 in series, the G end of the P-channel MOS field effect transistor Qa1 and the No. 4 pin of the optical coupler U2 are connected in series, the resistor R9 is connected with the No. 3 pin of the optical coupler U2 in ground, the No. 1 pin of the optical coupler U2 is connected with +3.3VD, the leakage current absorption resistor RC1 is connected between the No. 1 pin of the optical coupler U2 and the No. 2 pin of the optical coupler U2 and the resistor Rd1 is connected between the No. 2 pin of the optical coupler U2 and the processor module in.
3. The monitoring module is characterized in that the resistor R6 is connected in series between the G end of the N-channel MOS field effect transistor Qa2 and the D end of the P-channel MOS field effect transistor Qa1, the resistor R8 is connected in series between the G end of the N-channel MOS field effect transistor Qa2 and the ground, the zener diode D3 is connected in parallel at the resistor R8, the S end of the N-channel MOS field effect transistor Qa2 is grounded, and the D end of the N-channel MOS field effect transistor Qa2 is connected with the processor module.
4. The output module is connected with the G end of the P-channel MOS field effect transistor Qa1 of the control module through the positive end of the anti-reverse diode Dt1, and the negative end of the output module outputs the output signal to the outside.
5. The processor module (in this embodiment, a C8051F021 single chip microcomputer is used). The processor controls the optocoupler U2 to work by outputting a ground signal, receives a monitoring signal (ground signal) of the N-channel MOS field effect transistor Qa2, and logically judges whether the external output voltage is normal. And outputs a fault code to the outside through the 422 bus.
The invention has the multifunctional characteristics of overcurrent and overvoltage protection function, BIT monitoring function, fault code output function and the like.
The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (2)
1. The utility model provides an output circuit structure with overcurrent and overvoltage protection and self-checking function which characterized in that contains, overcurrent and overvoltage protection module, control module, monitoring module, output module and processor module, overcurrent and overvoltage protection module is used for carrying out the excessive pressure and overcurrent protection to input and output voltage and right control module output voltage, control module is used for the basis processor module output control signal control the voltage output of overcurrent and overvoltage protection module output, monitoring module is used for with control module output voltage exports after handling for processor module carries out BIT and detects, output module is used for with control module's output voltage exports after preventing reverse diode protection.
2. The output circuit structure with the functions of overcurrent and overvoltage protection and self-test as claimed in claim 1, wherein the processor module is configured to output a control signal to the control module, collect a BIT detection signal of the monitoring module, and output a fault code to the outside via a 422 bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252042.3A CN113036736A (en) | 2019-12-09 | 2019-12-09 | Output circuit structure with overcurrent and overvoltage protection and self-checking functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252042.3A CN113036736A (en) | 2019-12-09 | 2019-12-09 | Output circuit structure with overcurrent and overvoltage protection and self-checking functions |
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| Publication Number | Publication Date |
|---|---|
| CN113036736A true CN113036736A (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911252042.3A Pending CN113036736A (en) | 2019-12-09 | 2019-12-09 | Output circuit structure with overcurrent and overvoltage protection and self-checking functions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809720A (en) * | 2021-09-30 | 2021-12-17 | 陕西航空电气有限责任公司 | Overvoltage detection method and device based on generator controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616520A (en) * | 2009-08-03 | 2009-12-30 | 上海晶丰明源半导体有限公司 | A kind of LED open circuit guard circuit featuring low cost and high reliability |
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN203014989U (en) * | 2012-12-06 | 2013-06-19 | 北京空间机电研究所 | Remote sensing CCD camera power supply driving control circuit |
| CN103166314A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Direct current solid state power control system |
-
2019
- 2019-12-09 CN CN201911252042.3A patent/CN113036736A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616520A (en) * | 2009-08-03 | 2009-12-30 | 上海晶丰明源半导体有限公司 | A kind of LED open circuit guard circuit featuring low cost and high reliability |
| CN103166314A (en) * | 2011-12-19 | 2013-06-19 | 上海航空电器有限公司 | Direct current solid state power control system |
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN203014989U (en) * | 2012-12-06 | 2013-06-19 | 北京空间机电研究所 | Remote sensing CCD camera power supply driving control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809720A (en) * | 2021-09-30 | 2021-12-17 | 陕西航空电气有限责任公司 | Overvoltage detection method and device based on generator controller |
| CN113809720B (en) * | 2021-09-30 | 2024-03-19 | 陕西航空电气有限责任公司 | Overvoltage detection method and device based on generator controller |
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