CN110581530A - Power bus protection circuit based on intelligent fuse - Google Patents
Power bus protection circuit based on intelligent fuse Download PDFInfo
- Publication number
- CN110581530A CN110581530A CN201910870365.2A CN201910870365A CN110581530A CN 110581530 A CN110581530 A CN 110581530A CN 201910870365 A CN201910870365 A CN 201910870365A CN 110581530 A CN110581530 A CN 110581530A
- Authority
- CN
- China
- Prior art keywords
- current
- circuit
- real
- limiting threshold
- threshold value
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- H02H3/006—Calibration or setting of parameters
-
- 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
- H02H3/08—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 current
Abstract
A power bus protection circuit based on an intelligent fuse comprises a controller, a power bus circuit and the intelligent fuse, wherein the intelligent fuse is arranged in the power bus circuit; the intelligent fuse comprises a built-in current detection circuit, a power switch circuit, an AD conversion circuit, a current comparison circuit, an internal register and a communication interface circuit; the current detection circuit is used for detecting real-time current and converting the current value into analog voltage with a corresponding proportion; the AD conversion circuit is used for obtaining a real-time current value according to the analog voltage; the internal register is used for storing the current limiting threshold value and acquiring and storing a real-time current value; the controller is connected with the built-in register through the communication interface circuit to achieve the purposes of obtaining and changing the current limiting threshold value and returning the current limiting threshold value to the built-in register. The invention can realize real-time monitoring of the power bus current and online adjustment of the current limiting threshold, and can realize rapid protection when the change amplitude of the bus current exceeds a set value due to short-circuit fault of a rear-end power supply.
Description
Technical Field
the invention relates to the field of power bus protection circuits, in particular to a power bus protection circuit based on an intelligent fuse.
background
for high power supplies, internal short circuits will cause damage to the power supply devices, causing undesirable consequences. Therefore, a protection circuit needs to be placed at the input end of the high-power supply so as to cut off the power bus in time when a fault occurs, and avoid serious faults. The traditional bus protection is realized by adopting passive elements such as fuses, the dispersion of the current limiting threshold is large, the current limiting threshold changes along with the operation time and the working environment, and the online adjustment is difficult to be carried out according to the requirement (for modern processors such as CPU, GPU and ASIC, the working states of the modern processors have great difference along with the difference of operation subjects, and the corresponding power consumption has obvious difference.
In order to solve the problem, a power bus protection circuit based on an intelligent fuse is provided.
Disclosure of Invention
In order to solve the technical problems, the invention provides a power bus protection circuit based on an intelligent fuse, which can realize real-time monitoring of power bus current and online adjustment of a current limiting threshold, and can realize rapid protection when the change amplitude of the bus current exceeds a set value due to short-circuit fault of a rear-end power supply.
a power bus protection circuit based on an intelligent fuse comprises a controller, a power bus circuit and the intelligent fuse, wherein the intelligent fuse is arranged in the power bus circuit;
The intelligent fuse comprises a built-in current detection circuit, a power switch circuit, an AD conversion circuit, a current comparison circuit, a built-in register and a communication interface circuit;
The current detection circuit is used for detecting real-time current and converting the current into analog voltage with a corresponding proportion;
the AD conversion circuit is used for obtaining a real-time current value according to the analog voltage;
the built-in register stores a current limiting threshold value, is electrically connected with the AD conversion circuit and is used for acquiring and storing a real-time current value generated by the AD conversion circuit;
The current comparison circuit is used for acquiring a real-time current value and a current-limiting threshold value in a built-in register, comparing the real-time current value and the current-limiting threshold value, and outputting a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value;
the controller is connected with the built-in register through a communication interface circuit to achieve the purposes of obtaining and changing the current limiting threshold value and returning the changed current limiting threshold value to the built-in register.
the circuit in this application sets up current detection circuit, realizes the real-time supervision to the electric current, and when real-time current value was greater than the current-limiting threshold value, the power switch circuit disconnection effectively guaranteed power bus circuit's safety, simultaneously, communication interface circuit with the controller is connected, and the user of being convenient for carries out the on-line adjustment of current-limiting threshold value on the controller.
Preferably, the current comparison circuit is provided with a current value acquisition module, a current comparison module and a stop signal output module;
the current value acquisition module is electrically connected with the built-in register and is used for acquiring a current limiting threshold value and a real-time current value in the built-in register;
the current comparison module is electrically connected with the current value acquisition module and is used for comparing the acquired current limiting threshold value with the real-time current value;
And the stop signal output module is electrically connected with the current comparison module and sends a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value.
preferably, a switch module is arranged in the power switch circuit and electrically connected with the stop signal output module, and is used for controlling the power switch circuit to be switched off and on.
preferably, the controller is connected with the communication interface circuit through a communication bus.
Preferably, the controller is an MCU controller.
the invention has the beneficial effects that: the power supply bus current monitoring device can realize real-time monitoring of the power supply bus current and online adjustment of a current limiting threshold, and can realize rapid protection when the change amplitude of the bus current exceeds a set value due to short-circuit fault of a rear-end power supply.
Drawings
FIG. 1 is a schematic diagram of a power bus protection circuit according to an embodiment.
Detailed Description
The invention is described in further detail below:
Example (b): a power bus protection circuit based on an intelligent fuse comprises a controller, a power bus circuit and the intelligent fuse, wherein the intelligent fuse is arranged in the power bus circuit;
The intelligent fuse comprises a built-in current detection circuit, a power switch circuit, an AD conversion circuit, a current comparison circuit, a built-in register and a communication interface circuit;
the current detection circuit is used for detecting real-time current and converting the current into analog voltage with a corresponding proportion;
The AD conversion circuit is used for obtaining a real-time current value according to the analog voltage;
the built-in register stores a current limiting threshold value, is electrically connected with the AD conversion circuit and is used for acquiring and storing a real-time current value generated by the AD conversion circuit;
The current comparison circuit is used for acquiring a real-time current value and a current-limiting threshold value in a built-in register, comparing the real-time current value and the current-limiting threshold value, and outputting a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value;
The controller is connected with the built-in register through a communication interface circuit to achieve the purposes of obtaining and changing the current limiting threshold value and returning the changed current limiting threshold value to the built-in register, and the controller is connected with the communication interface circuit through a communication bus; preferably, the controller is an MCU controller, and the PMBus command is used to adjust or change the current limit threshold online.
the circuit in this application sets up current detection circuit, realizes the real-time supervision to the electric current, and when real-time current value was greater than the current-limiting threshold value, the power switch circuit disconnection effectively guaranteed power bus circuit's safety, simultaneously, communication interface circuit with the controller is connected, and the user of being convenient for carries out the on-line adjustment of current-limiting threshold value on the controller.
Preferably, the current comparison circuit is provided with a current value acquisition module, a current comparison module and a stop signal output module; the current value acquisition module is electrically connected with the built-in register and is used for acquiring a current limiting threshold value and a real-time current value in the built-in register; the current comparison module is electrically connected with the current value acquisition module and is used for comparing the acquired current limiting threshold value with the real-time current value; and the stop signal output module is electrically connected with the current comparison module and sends a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value.
preferably, a switch module is arranged in the power switch circuit and electrically connected with the stop signal output module, and is used for controlling the power switch circuit to be switched off and on.
The foregoing is only a preferred embodiment of the present invention and all equivalent changes or modifications in the structure, characteristics and principles described in the present patent application are included in the scope of the present patent application.
Claims (5)
1. A power bus protection circuit based on an intelligent fuse is characterized by comprising a controller, a power bus circuit and an intelligent fuse, wherein the intelligent fuse is arranged in the power bus circuit;
The intelligent fuse comprises a built-in current detection circuit, a power switch circuit, an AD conversion circuit, a current comparison circuit, a built-in register and a communication interface circuit;
The current detection circuit is used for detecting real-time current and converting the current into analog voltage with a corresponding proportion;
the AD conversion circuit is used for obtaining a real-time current value according to the analog voltage;
the built-in register stores a current limiting threshold value, is electrically connected with the AD conversion circuit and is used for acquiring and storing a real-time current value generated by the AD conversion circuit;
The current comparison circuit is used for acquiring a real-time current value and a current-limiting threshold value in a built-in register, comparing the real-time current value and the current-limiting threshold value, and outputting a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value;
The controller is connected with the built-in register through a communication interface circuit to achieve the purposes of obtaining and changing the current limiting threshold value and returning the changed current limiting threshold value to the built-in register.
2. the power bus protection circuit based on the intelligent fuse as recited in claim 1, wherein the current comparison circuit is provided with a current value acquisition module, a current comparison module and a stop signal output module;
the current value acquisition module is electrically connected with the built-in register and is used for acquiring a current limiting threshold value and a real-time current value in the built-in register;
The current comparison module is electrically connected with the current value acquisition module and is used for comparing the acquired current limiting threshold value with the real-time current value;
And the stop signal output module is electrically connected with the current comparison module and sends a stop signal to the power switch circuit when the real-time current value is greater than the current-limiting threshold value.
3. The power bus protection circuit based on the smart fuse as recited in claim 1, wherein a switch module is disposed in the power switch circuit, and is electrically connected to the stop signal output module for controlling the power switch circuit to be turned on or off.
4. a smart fuse based power bus protection circuit as recited in claim 1 wherein said controller is connected to said communication interface circuit via a communication bus.
5. The intelligent-fuse-based power bus protection circuit as recited in claim 1, wherein the controller is an MCU controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870365.2A CN110581530A (en) | 2019-09-16 | 2019-09-16 | Power bus protection circuit based on intelligent fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870365.2A CN110581530A (en) | 2019-09-16 | 2019-09-16 | Power bus protection circuit based on intelligent fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110581530A true CN110581530A (en) | 2019-12-17 |
Family
ID=68811536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910870365.2A Pending CN110581530A (en) | 2019-09-16 | 2019-09-16 | Power bus protection circuit based on intelligent fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110581530A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682248A (en) * | 2020-05-19 | 2021-11-23 | 上汽通用汽车有限公司 | Automobile-used intelligent fuse box with drive and guard action |
| CN114204426A (en) * | 2021-12-15 | 2022-03-18 | 重庆欣瑞鸿科技有限公司 | Long power supply device with short circuit safety structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202405876U (en) * | 2011-12-23 | 2012-08-29 | 航天时代电子技术股份有限公司 | Electromechanical power controller based on real-time bus |
| CN103269056A (en) * | 2013-06-08 | 2013-08-28 | 临沂市拓普网络股份有限公司 | Current detection protection device and method |
| CN105305367A (en) * | 2014-05-30 | 2016-02-03 | 宇龙计算机通信科技(深圳)有限公司 | Overcurrent protection method and system |
| CN105429097A (en) * | 2015-12-30 | 2016-03-23 | 北京易艾斯德科技有限公司 | Fire power supply bus short circuit recognition and protection circuit |
| CN107732866A (en) * | 2017-09-30 | 2018-02-23 | 深圳市沃特玛电池有限公司 | A kind of intelligent protector |
-
2019
- 2019-09-16 CN CN201910870365.2A patent/CN110581530A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202405876U (en) * | 2011-12-23 | 2012-08-29 | 航天时代电子技术股份有限公司 | Electromechanical power controller based on real-time bus |
| CN103269056A (en) * | 2013-06-08 | 2013-08-28 | 临沂市拓普网络股份有限公司 | Current detection protection device and method |
| CN105305367A (en) * | 2014-05-30 | 2016-02-03 | 宇龙计算机通信科技(深圳)有限公司 | Overcurrent protection method and system |
| CN105429097A (en) * | 2015-12-30 | 2016-03-23 | 北京易艾斯德科技有限公司 | Fire power supply bus short circuit recognition and protection circuit |
| CN107732866A (en) * | 2017-09-30 | 2018-02-23 | 深圳市沃特玛电池有限公司 | A kind of intelligent protector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682248A (en) * | 2020-05-19 | 2021-11-23 | 上汽通用汽车有限公司 | Automobile-used intelligent fuse box with drive and guard action |
| CN114204426A (en) * | 2021-12-15 | 2022-03-18 | 重庆欣瑞鸿科技有限公司 | Long power supply device with short circuit safety structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204243730U (en) | The current foldback circuit of Intelligent Power Module and air conditioner | |
| GB2468000A (en) | Over-current protection circuit and motor controller | |
| CN103066559B (en) | Power-off protector | |
| CN110581530A (en) | Power bus protection circuit based on intelligent fuse | |
| CN105633905A (en) | Overvoltage and under-voltage protection circuit | |
| CN202633893U (en) | Short circuit/overcurrent protection controller | |
| CN103366460A (en) | Circuit breaker for prepaid electric meter | |
| CN205029421U (en) | Power supply switching device | |
| CN203243019U (en) | Power-off protector | |
| CN203260995U (en) | Single-phase safety electricity-using appliance | |
| CN201846125U (en) | Control system of automobile power | |
| EP3021441B1 (en) | Selective event reaction processing in power control | |
| CN210490443U (en) | Safety control device and safety control system | |
| CN207249051U (en) | A kind of industrial frequency withstand voltage test device | |
| CN103219694A (en) | Over-current protecting circuit | |
| CN209748404U (en) | Three-phase rectification protection circuit with input surge current suppression function | |
| CN103545794A (en) | Protecting module of control and protection switching device | |
| CN203166463U (en) | Over-current protection circuit | |
| CN201860086U (en) | Medical power supply management circuit | |
| CN204614686U (en) | Electrical apparatus-switching device | |
| CN111786354B (en) | Thyristor short-circuit protection circuit and device | |
| CN204258298U (en) | A kind of low-pressure energy-saving stable-pressure device | |
| CN203574423U (en) | Integration voltage stabilization and low voltage detection power supply chip applied to electronic product | |
| CN211376531U (en) | Electronic type thermal relay contact expanding unit | |
| CN203911141U (en) | Timing power socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191217 |
|
| RJ01 | Rejection of invention patent application after publication |