Fault output and alarm circuit for ATS
By employing S1 and FAULT level conversion circuits in the ATS device, and using MOSFETs and relays to control the changes in relay contacts, a single signal is used to indicate the fault status. This solves the problem of complex fault output and alarm signals in existing ATS devices, reduces costs, and improves the convenience of detection.
Patent Information
- Application Number
- CN202520241381.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Existing ATS devices struggle to provide low-cost, simplified fault output and alarm signal indication after a power failure, typically requiring two signals, which makes detection and handling inconvenient.
An S1 level conversion circuit and a FAULT level conversion circuit are used. The level conversion circuit is built using MOSFETs, relays and transistors, so that two signals share a single microcontroller pin. The conduction and cutoff of the transistors control the change of the relay contacts, so as to realize a single signal indicating the fault status.
It realizes a low-cost fault output and alarm circuit, simplifies the peripheral circuit, indicates the fault status through a single signal, facilitates users to expand alarm signals, and improves the convenience and reliability of fault detection.
Smart Images
Figure CN223872267U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the ATS technical field, especially a kind of fault output and alarm circuit for ATS. BACKGROUND
[0002] ATS dual power supply transfer switch is a kind of device for automatically switching between normal power supply and standby power supply.When normal power supply fails or power outage, ATS can quickly switch load from one power supply to another, ensure the normal operation of equipment, so as to guarantee the continuity and reliability of power supply.ATS is widely used in various occasions requiring uninterrupted power supply, such as high-rise buildings, postal communication, coal mine, ship, industrial assembly line, medical health, etc.These places have higher requirements for the continuity and reliability of power supply, once power failure, it may cause significant loss or security risk.
[0003] At present, the main conversion criterion of ATS is the collection and judgment of upper power supply voltage.When power supply voltage is abnormal, such as under-voltage, over-voltage, it will lead to ATS conversion, ATS is equipped with power indicator, when power supply is abnormal, it shows flickering state, when power supply is normal, it shows constant state.
[0004] In actual field application, power failure needs to be investigated, it is difficult to detect all in real time for large-area control, therefore, users often need a signal to indicate the current power supply state, when under-voltage, over-voltage and other phenomena occur, a dry node signal is given, users can detect it through background, usually accompanied by an alarm node, so as to remind on-site personnel and background to detect the current state in time and confirm and handle fault.The above usually needs two signals to realize.
[0005] In the process of ATS design, due to the influence of cost or resource, it is impossible to provide enough signal support, therefore, a low-cost, simple driving circuit is needed. CONTENT OF UTILITY MODEL
[0006] The problem to be solved by the utility model is to provide a kind of fault output and alarm circuit for ATS.
[0007] The utility model provides a technical scheme that is adopted to solve the above technical problems: a fault output and alarm circuit for ATS, comprising a S1 level conversion circuit and a FAULT level conversion circuit, the S1 level conversion circuit comprises a resistor R5, a MOS tube Q1 and a relay K1, a S1 output end is connected with the relay K1 through the resistor R5 and the MOS tube Q1, and is used for controlling whether the relay K1 contact changes or not, the FAULT level conversion circuit comprises a resistor R1, a triode Q2, a MOS tube Q3 and a relay K2, a FAULT output end is connected with the relay K2 through the resistor R1, the triode Q2 and the MOS tube Q3, and is used for controlling whether the relay K2 contact changes or not.
[0008] Further, the S1 output end and the FAULT output end are connected with the same pin of a single-chip microcomputer respectively.
[0009] Further, when the S1 output end is a high level, a drive signal passes through the resistor R5 and the MOS tube Q1 is turned on, the relay K1 contact changes, and the normally closed point changes into a normally open point; when the S1 output end is a low level, the MOS tube Q1 is cut off, and the relay K1 contact does not change.
[0010] Further, in the S1 level conversion circuit, the resistor R5 is connected with the gate of the MOS tube Q1, a capacitor C1 and a resistor R2 are arranged between the resistor R5 and the MOS tube Q1, one end of the capacitor C1 is connected with the resistor R5, and the other end is connected with the source of the MOS tube Q1; one end of the resistor R2 is connected with the resistor R5, and the other end is grounded; the drain of the MOS tube Q1 is connected with a diode D1 and the electromagnetic coil loop of the relay K1 respectively, thereby controlling the relay K1 contact change.
[0011] Further, when the FAULT output end is a high level, a drive signal passes through the resistor R1, and the current flows into the base of the triode Q2 to turn on, the MOS tube Q3 is cut off, and the relay K2 contact does not change; when the FAULT output end is a low level, a drive signal passes through the resistor R1, the triode Q2 is cut off, and the MOS tube Q3 is turned on, at this time, the relay K2 contact changes from a normally open point into a normally closed point.
[0012] Further, in the FAULT level conversion circuit, the resistor R1 is connected with the base of the transistor Q2, the capacitor C3 and the resistor R3 are arranged between the resistor R1 and the transistor Q2, one end of the capacitor C3 is connected with the resistor R1, and the other end is connected with the emitter of the transistor Q2; one end of the resistor R3 is connected with the resistor R1, and the other end is grounded; the resistor R11 is connected with the gate of the MOS tube Q3, the transistor Q2 is arranged between the resistor R11 and the MOS tube Q3, one end of the transistor Q2 is connected with the gate of the MOS tube Q3, and the other end is connected with the source of the MOS tube Q3; the resistor R12 and the capacitor C6 are connected in parallel between the transistor Q2 and the MOS tube Q3; the drain of the MOS tube Q3 is connected with the diode D2 and the electromagnetic coil loop of the relay K2 respectively, thereby controlling the contact change of the relay K2.
[0013] By adopting the technical scheme, the utility model has the following beneficial effects:
[0014] The utility model discloses a level conversion circuit built by the transistor and MOS tube and relay, and the peripheral circuit is simple, the conduction and cut-off of the transistor can make two signals share a singlechip pin, and the output dry node signal is consistent. The alarm signal uses the dry node form, which is convenient for users to expand. BRIEF DESCRIPTION OF DRAWINGS
[0015] The advantages and implementation modes of the utility model will be more obvious by referring to the drawings and combining the examples, wherein the contents shown in the drawings are only used for explaining and describing the utility model, and do not constitute any sense of limitation to the utility model, and in the drawings:
[0016] Figure 1 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION
[0017] As Figure 1 shown, the utility model discloses a kind of ATS fault output and alarm circuit, including S1 level conversion circuit and FAULT level conversion circuit, S1 level conversion circuit includes resistor R5, MOS tube Q1 and relay K1, S1 output end is connected with relay K1 by resistor R5, MOS tube Q1, for controlling whether the contact of relay K1 changes;FAULT level conversion circuit includes resistor R1, transistor Q2, MOS tube Q3 and relay K2, FAULT output end is connected with relay K2 by resistor R1, transistor Q2, MOS tube Q3, for controlling whether the contact of relay K2 changes;S1 output end and FAULT output end are connected with the same pin of singlechip respectively.
[0018] When the S1 output end is high level, the driving signal passes through the resistor R5, the MOS tube Q1 is turned on, the contact of the relay K1 changes, and the normally closed point changes into the normally open point; when the S1 output end is low level, the MOS tube Q1 is cut off, and the contact of the relay K1 does not change.
[0019] Specifically, the resistor R5 is connected with the gate of the MOS tube Q1, the capacitor C1 and the resistor R2 are arranged between the resistor R5 and the MOS tube Q1, one end of the capacitor C1 is connected with the resistor R5, and the other end is connected with the source of the MOS tube Q1; one end of the resistor R2 is connected with the resistor R5, and the other end is grounded; the drain of the MOS tube Q1 is connected with the diode D1 and the electromagnetic coil loop of the relay K1 respectively, thereby controlling the contact change of the relay K1.
[0020] When the FAULT output end is high level, the driving signal passes through the resistor R1, the current flows into the base of the triode Q2, and then the MOS tube Q3 is cut off, and the contact of the relay K2 does not change; when the FAULT output end is low level, the driving signal passes through the resistor R1, the triode Q2 is cut off, and the MOS tube Q3 is turned on, at this time, the contact of the relay K2 changes from the normally open to the normally closed.
[0021] Specifically, the resistor R1 is connected with the base of the triode Q2, the capacitor C3 and the resistor R3 are arranged between the resistor R1 and the triode Q2, one end of the capacitor C3 is connected with the resistor R1, and the other end is connected with the emitter of the triode Q2; one end of the resistor R3 is connected with the resistor R1, and the other end is grounded; the resistor R11 is connected with the gate of the MOS tube Q3, the triode Q2 is arranged between the resistor R11 and the MOS tube Q3, one end of the triode Q2 is connected with the gate of the MOS tube Q3, and the other end is connected with the source of the MOS tube Q3; the resistor R12 and the capacitor C6 are connected in parallel between the triode Q2 and the MOS tube Q3; the drain of the MOS tube Q3 is connected with the diode D2 and the electromagnetic coil loop of the relay K2 respectively, thereby controlling the contact change of the relay K2.
[0022] Working process:
[0023] The S1 output end (switch output end) and the FAULT output end (indicator light output end) share one single-chip microcomputer pin, so as to save the single-chip microcomputer resources, when the fault is identified, the single-chip microcomputer sends a command, and simultaneously makes the relay K1 and the relay K2 act.
[0024] When the S1 output end is high level, the driving signal passes through the resistor R5, and the MOS tube Q1 is turned on. At this time, the contact of the relay K1 changes, and the normally closed point changes into the normally open point; when the S1 output end is low level, the MOS tube Q1 is cut off, and at this time, the contact of the relay K1 does not change.
[0025] When the FAULT output is high, the drive signal passes through resistor R1, and the current flows into the base of transistor Q2, which then conducts, while MOSFET Q3 is cut off. At this time, the contacts of relay K2 do not change. When the FAULT output is low, the drive signal passes through resistor R1, transistor Q2 is cut off, and MOSFET Q3 is turned on. At this time, the normally open contacts of relay K2 become normally closed.
[0026] As described above, the S1 output and the FAULT output are controlled by the same microcontroller pin, and the two relays can operate simultaneously when the level changes. The fault output node uses a set of switching relays, which are closed when there is a fault and open when normal. Therefore, the S1 output needs to be set to a high level when power is applied. The fault alarm node uses a set of normally open relays, which are closed when there is a fault and open when normal.
[0027] The fault types and alarm types of these two nodes can be selected multiple times in the controller menu, and output signals of types such as overvoltage and undervoltage are supported.
[0028] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.
Claims
1. A fault output and alarm circuit for an ATS, characterized in that: The circuit includes an S1 level conversion circuit and a FAULT level conversion circuit. The S1 level conversion circuit includes a resistor R5, a MOSFET Q1, and a relay K1. The output terminal of the S1 circuit is connected to the relay K1 through the resistor R5, the MOSFET Q1, and the relay K1. The FAULT level conversion circuit includes a resistor R1, a transistor Q2, a MOSFET Q3, and a relay K2. The output terminal of the FAULT circuit is connected to the relay K2 through the resistor R1, the transistor Q2, the MOSFET Q3, and the relay K2.
2. The fault output and alarm circuit for ATS according to claim 1, characterized in that: The S1 output terminal and the FAULT output terminal are respectively connected to the same pin of the microcontroller.
3. The fault output and alarm circuit for ATS according to claim 1, characterized in that: When the output of S1 is high, the drive signal passes through resistor R5, MOSFET Q1 is turned on, and the contacts of relay K1 change from normally closed to normally open; when the output of S1 is low, MOSFET Q1 is turned off, and the contacts of relay K1 remain unchanged.
4. The fault output and alarm circuit for ATS according to claim 3, characterized in that: In the S1 level conversion circuit, resistor R5 is connected to the gate of MOSFET Q1. A capacitor C1 and a resistor R2 are provided between resistor R5 and MOSFET Q1. One end of capacitor C1 is connected to resistor R5, and the other end is connected to the source of MOSFET Q1. One end of resistor R2 is connected to resistor R5, and the other end is grounded. The drain of MOSFET Q1 is connected to the electromagnetic coil circuit of diode D1 and relay K1, thereby controlling the contact change of relay K1.
5. The fault output and alarm circuit for ATS according to claim 1, characterized in that: When the FAULT output is high, the drive signal passes through resistor R1, and the current flows into the base of transistor Q2, which then conducts. The MOSFET Q3 is cut off, and the contacts of relay K2 remain unchanged. When the FAULT output is low, the drive signal passes through resistor R1, transistor Q2 is cut off, and MOSFET Q3 is turned on. At this time, the normally open contacts of relay K2 become normally closed.
6. The fault output and alarm circuit for ATS according to claim 5, characterized in that: In the FAULT level conversion circuit, resistor R1 is connected to the base of transistor Q2. A capacitor C3 and resistor R3 are positioned between resistor R1 and transistor Q2. One end of capacitor C3 is connected to resistor R1, and the other end is connected to the emitter of transistor Q2. One end of resistor R3 is connected to resistor R1, and the other end is grounded. Resistor R11 is connected to the gate of MOSFET Q3. A transistor Q2 is positioned between resistor R11 and MOSFET Q3. One end of transistor Q2 is connected to the gate of MOSFET Q3, and the other end is connected to the source of MOSFET Q3. Resistor R12 and capacitor C6 are connected in parallel between transistor Q2 and MOSFET Q3. The drain of MOSFET Q3 is connected to the electromagnetic coil circuit of diode D2 and relay K2, thereby controlling the contact changes of relay K2.