Power failure protection circuit
By designing a power-down protection circuit including power supply module, control module, SW power supply module, backup power module and detection module, the problem of the system being rebooted for too long after power-down is solved, and timely data storage and system storage are realized Reliable operation.
Patent Information
- Application Number
- CN202420263835.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-03
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-02-03
AI Technical Summary
In the prior art, the system will take too long to restart after power-off, and data cannot be saved in time, which affects the normal operation of the system and the integrity of the data.
A power-down protection circuit was designed, including power supply module, control module, SW power supply module, backup power module and detection module. Through intelligent control and management of backup power, we ensure that SW power supply is timely, reliable and stable, and intelligently when power is out. Disconnect power to prevent data loss.
It realizes the rapid power supply recovery after the system is powered off, ensures timely storage of data, improves the reliability and user experience of the system, and meets the needs of various application scenarios for powered off and data storage.
Smart Images
Figure CN222441402U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic circuits, in particular to a power-off protection circuit. Background Art
[0002] The power-off protection circuit is equivalent to having "backup power supply" and "delayed power-off", and can intelligently identify power failures, issue commands, and maintain power supply. In the current data age, various data parameters are particularly important. Various experiments need to record current data in a timely manner, and the current operation stage also needs to be saved in actual operations; the data collected or generated during system operation is often required not to be lost when the power is off, and the system can be restored to its original working state after power is restored. At present, most of them use batteries, but they need corresponding charging and discharging circuits, and the cost is correspondingly high. Their service life is limited by the number of battery charge and discharge times; the use of farad capacitors requires a long time to restart, or rapid plugging and unplugging may cause the machine to fail to start, and a good startup experience cannot be obtained. Utility Model Content
[0003] The utility model provides a power-off protection circuit, aiming to solve the problem in the prior art that it takes too long to restart the system after power off.
[0004] The utility model provides a power-off protection circuit, comprising a power module, a control module, a SW power supply module, a backup power module and a detection module, wherein the power module is connected to the backup power module, the backup power module is connected to the SW power supply module, the power module and the SW power supply module are respectively connected to industrial control equipment, the detection module is connected to the power module and sends a detection instruction to the industrial control equipment, and the control module is connected to the SW power supply module and receives a control instruction sent by the industrial control equipment.
[0005] As a further improvement of the present utility model, the power supply module includes a DC power supply, a transformer B1 and a field effect transistor Q44, pin 1 of the DC power supply is connected to pin 3 of the transformer B1, pin 2 of the DC power supply is connected to pin 4 of the transformer B1, pin 1 of the transformer B1 is connected to the source of the field effect transistor Q44, pin 2 of the transformer B1 is connected to the drain of the field effect transistor Q44, and the gate of the field effect transistor Q44 is connected to the source of the field effect transistor Q44.
[0006] As a further improvement of the present invention, pin 1 of the transformer B1 outputs a 24V DC voltage.
[0007] As a further improvement of the present utility model, the detection module includes a field effect transistor PQ36, the drain of the field effect transistor PQ36 is connected to the GPP_D01 terminal of the industrial control equipment, the source of the field effect transistor PQ36 is grounded, the gate of the field effect transistor PQ36 is connected to one end of the resistor PR119, the other end of the resistor PR119 is connected to a 24V DC voltage, and the resistor PR117 is connected between the gate and the source of the field effect transistor PQ36.
[0008] As a further improvement of the present utility model, the SW power supply module includes a field effect transistor Q43 and a diode D8, the source of the field effect transistor Q43 is connected to the cathode of the voltage-stabilizing diode D112, the anode of the voltage-stabilizing diode D112 is connected to the power supply module, the gate of the field effect transistor Q43 is connected to one end of the resistor R486, the other end of the resistor R486 is connected to the control module, the drain of the field effect transistor Q43 is connected to pin 2 of the diode D8, pin 1 of the diode D8 is connected to a 24V DC voltage, and pin 3 of the diode D8 is connected to the source of the field effect transistor Q44.
[0009] As a further improvement of the utility model, the backup power supply module includes battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29, and the battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29 are connected end to end in sequence.
[0010] As a further improvement of the present invention, the positive electrode of the battery CE4 is connected to the source electrode of the field effect transistor Q43.
[0011] As a further improvement of the present utility model, the control module includes a field effect transistor PQ39, the drain of the field effect transistor PQ39 is connected to the other end of the resistor R486, the gate of the field effect transistor PQ39 is connected to a 24V DC voltage, the gate of the field effect transistor PQ39 is connected to the GP_H09 terminal of the industrial control equipment, the source of the field effect transistor PQ39 is grounded, and the resistor R4499 is connected between the gate and the source of the field effect transistor PQ39.
[0012] The beneficial effects of the utility model are as follows: the control module in the present solution has different commonly used circuits, and the industrial control equipment intelligently controls and manages the backup power supply to provide energy according to its own operating conditions, ensuring the SW power supply is timely, reliable, stable and has the function of intelligently disconnecting the power supply, making the user experience more convenient and meeting the use requirements in various application scenarios for saving data during power outages. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a relationship diagram between various modules of the utility model;
[0014] Figure 2 It is a specific circuit connection diagram of the power module of the utility model;
[0015] Figure 3 It is a specific circuit connection diagram of the detection module of the utility model;
[0016] Figure 4 It is a specific circuit connection diagram of the control module, SW power supply module and backup power supply module of the utility model. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] like Figure 1-4 As shown, the utility model provides a power-off protection circuit, including a power module, a control module, a SW power supply module, a backup power module and a detection module, the power module is connected to the backup power module, the backup power module is connected to the SW power supply module, the power module and the SW power supply module are respectively connected to industrial control equipment, the detection module is connected to the power module and sends a detection instruction to the industrial control equipment, and the control module is connected to the SW power supply module and receives the control instruction sent by the industrial control equipment.
[0019] As an embodiment of the utility model, the power supply module includes a DC power supply, a transformer B1 and a field effect transistor Q44, pin 1 of the DC power supply is connected to pin 3 of the transformer B1, pin 2 of the DC power supply is connected to pin 4 of the transformer B1, pin 1 of the transformer B1 is connected to the source of the field effect transistor Q44, pin 2 of the transformer B1 is connected to the drain of the field effect transistor Q44, and the gate of the field effect transistor Q44 is connected to the source of the field effect transistor Q44.
[0020] As another embodiment of the present utility model, pin 1 of the transformer B1 outputs a 24V DC voltage.
[0021] As another embodiment of the utility model, the detection module includes a field effect transistor PQ36, the drain of the field effect transistor PQ36 is connected to the GPP_D01 terminal of the industrial control equipment, the source of the field effect transistor PQ36 is grounded, the gate of the field effect transistor PQ36 is connected to one end of the resistor PR119, the other end of the resistor PR119 is connected to a 24V DC voltage, and the resistor PR117 is connected between the gate and the source of the field effect transistor PQ36.
[0022] As another embodiment of the utility model, the SW power supply module includes a field effect transistor Q43 and a diode D8, the source of the field effect transistor Q43 is connected to the cathode of the voltage-stabilizing diode D112, the anode of the voltage-stabilizing diode D112 is connected to the power supply module, the gate of the field effect transistor Q43 is connected to one end of the resistor R486, the other end of the resistor R486 is connected to the control module, the drain of the field effect transistor Q43 is connected to pin 2 of the diode D8, pin 1 of the diode D8 is connected to a 24V DC voltage, and pin 3 of the diode D8 is connected to the source of the field effect transistor Q44.
[0023] As another embodiment of the utility model, the backup power supply module includes battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29, and the battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29 are connected end to end in sequence.
[0024] As another embodiment of the present invention, the positive electrode of the battery CE4 is connected to the source electrode of the field effect transistor Q43.
[0025] As another embodiment of the utility model, the control module includes a field effect transistor PQ39, the drain of the field effect transistor PQ39 is connected to the other end of the resistor R486, the gate of the field effect transistor PQ39 is connected to a 24V DC voltage, the gate of the field effect transistor PQ39 is connected to the GP_H09 terminal of the industrial control equipment, the source of the field effect transistor PQ39 is grounded, and the resistor R4499 is connected between the gate and the source of the field effect transistor PQ39.
[0026] The utility model provides a power-off protection circuit. The successful application of the product 9418 in the market verifies that the power-off protection circuit is mature and meets the use requirements in various application scenarios for saving data during power failure.
[0027] See attached Figure 2-4 , the power supply for the industrial control equipment is provided by the power supply module or the backup power supply module.
[0028] When the industrial control equipment is powered by the power module, the gate of the field effect transistor PQ36 in the detection circuit is at a high level, the source and drain of the field effect transistor PQ36 are turned on, and the detection instruction A (GPP_D01) is at the same level as GND, which is a low level. The industrial control equipment determines that the power supply is normal. When the equipment runs for a certain period of time and has a meaning for saving the operating status or data, it issues a control instruction B (GP_H09) at a high level.
[0029] When the power module is powered off, the gate of the field effect transistor PQ36 becomes low level under the action of the resistor PR117, the source and drain of the field effect transistor PQ36 are cut off, and the detection instruction A (GPP_D01) will be high level under the action of the pull-up. The industrial control equipment is judged as power off and maintains the control instruction B (GP_H09) as the current state; if the control instruction B (GP_H09) is low level, the source and drain of the field effect transistor PQ39 are cut off, the gate and source of the field effect transistor Q43 are at the same level, the source and drain are cut off, and the industrial control equipment is shut down due to lack of power. If the control instruction B (GP_H09) is at a high level, the source and drain of the field effect transistor PQ39 are turned on and become low level, and the gate of the field effect transistor Q43 becomes lower accordingly, and there is a sufficient voltage difference VGS with the source. The source and the drain are turned on, and the backup power supply is thus supplied through the SW power supply module. The industrial control equipment can continue to work and save data in time. When the data is saved, the control instruction B (GP_H09) becomes a low level, the SW power supply module is disconnected, and the industrial control equipment is shut down due to lack of power.
[0030] When the industrial control equipment is initially powered on or when there is no data to be saved, the control instruction B (GP_H09) is at a low level. The field effect transistor PQ39 is in a cut-off state when the resistor R4499 is grounded. The gate of the corresponding field effect transistor Q43 is at the same level as the source under the action of the resistor R484. The source and the drain are cut off. The SW power supply module cannot provide backup power to the industrial control computer. The power supply of the industrial control equipment is provided by the power module, and the switch on and off is the same as that of an ordinary industrial control computer.
[0031] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A power-off protection circuit, characterized in that: It includes a power module, a control module, a SW power supply module, a backup power module and a detection module. The power module is connected to the backup power module, the backup power module is connected to the SW power supply module, the power module and the SW power supply module are respectively connected to industrial control equipment, the detection module is connected to the power module and sends a detection instruction to the industrial control equipment, and the control module is connected to the SW power supply module and receives the control instruction sent by the industrial control equipment.
2. A power-off protection circuit according to claim 1, characterized in that: The power module includes a DC power supply, a transformer B1 and a field effect transistor Q44, wherein pin 1 of the DC power supply is connected to pin 3 of the transformer B1, pin 2 of the DC power supply is connected to pin 4 of the transformer B1, pin 1 of the transformer B1 is connected to the source of the field effect transistor Q44, pin 2 of the transformer B1 is connected to the drain of the field effect transistor Q44, and the gate of the field effect transistor Q44 is connected to the source of the field effect transistor Q44.
3. A power-off protection circuit according to claim 2, characterized in that: Pin 1 of the transformer B1 outputs a 24V DC voltage.
4. A power-off protection circuit according to claim 2, characterized in that: The detection module includes a field effect transistor PQ36, the drain of the field effect transistor PQ36 is connected to the GPP_D01 terminal of the industrial control equipment, the source of the field effect transistor PQ36 is grounded, the gate of the field effect transistor PQ36 is connected to one end of a resistor PR119, the other end of the resistor PR119 is connected to a 24V DC voltage, and the resistor PR117 is connected between the gate and the source of the field effect transistor PQ36.
5. A power-off protection circuit according to claim 4, characterized in that: The SW power supply module includes a field effect transistor Q43 and a diode D8, the source of the field effect transistor Q43 is connected to the cathode of the voltage-stabilizing diode D112, the anode of the voltage-stabilizing diode D112 is connected to the power supply module, the gate of the field effect transistor Q43 is connected to one end of the resistor R486, the other end of the resistor R486 is connected to the control module, the drain of the field effect transistor Q43 is connected to the 2nd pin of the diode D8, the 1st pin of the diode D8 is connected to the 24V DC voltage, and the 3rd pin of the diode D8 is connected to the source of the field effect transistor Q44.
6. A power-off protection circuit according to claim 5, characterized in that: The backup power supply module includes battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29, and the battery CE4, battery CE19, battery CE20, battery CE21, battery CE22, battery CE23, battery CE24, battery CE25, battery CE26 and battery CE29 are connected end to end in sequence.
7. A power-off protection circuit according to claim 6, characterized in that: The positive electrode of the battery CE4 is connected to the source of the field effect transistor Q43.
8. A power-off protection circuit according to claim 5, characterized in that: The control module includes a field effect transistor PQ39, the drain of the field effect transistor PQ39 is connected to the other end of the resistor R486, the gate of the field effect transistor PQ39 is connected to a 24V DC voltage, the gate of the field effect transistor PQ39 is connected to the GP_H09 terminal of the industrial control equipment, the source of the field effect transistor PQ39 is grounded, and the resistor R4499 is connected between the gate and the source of the field effect transistor PQ39.