CN219625634U - Failure detection circuit and device for power device on main power loop - Google Patents
Failure detection circuit and device for power device on main power loop Download PDFInfo
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- CN219625634U CN219625634U CN202320598766.9U CN202320598766U CN219625634U CN 219625634 U CN219625634 U CN 219625634U CN 202320598766 U CN202320598766 U CN 202320598766U CN 219625634 U CN219625634 U CN 219625634U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model provides a failure detection circuit and a failure detection device for a power device on a main power loop, which relate to the technical field of circuit control, wherein voltage values at two ends of a power element are acquired in real time through a voltage sampling circuit, and whether the power device fails or not is judged by an MCU (micro controller Unit) according to the voltage values at the two ends of the power element acquired in real time by the voltage sampling circuit, wherein if the voltage values at the two ends of the power device acquired by the voltage acquisition circuit are the same, the MCU judges that the power device is normal; if the voltage values of the two ends of the power device collected by the voltage collecting circuit are different, the MCU judges that the power device is abnormal and controls the alarm circuit to alarm, so that the purpose of protecting equipment is achieved.
Description
Technical Field
The present utility model relates to the field of circuit control technologies, and in particular, to a failure detection circuit and device for a power device on a main power loop.
Background
Power devices are very important for electronic products. For example, the fuse is connected in series to the power input end of the circuit, and is used for controlling the total current of the whole circuit or is also used for controlling the switching element MOS tube of charging and discharging.
The fuse has the working principle that when the increased fault current flows through the fuse after the circuit fails, the fuse generates heat, heats up and melts automatically so as to cut off the power supply to achieve the protection purpose. However, when the FUSE is damaged or aged after a long period of use (the device itself may be aged after a long period of use in years), the FUSE impedance increases, and when the FUSE is damaged, the impedance becomes infinite. Therefore, when FUSE is damaged, large current discharge cannot be performed, and unnecessary loss is liable to occur. Similarly, for a MOS transistor, if the switch is turned on, the switch is turned off due to expiration, or turned off, the device is damaged. The existing circuit does not have the function of performing failure detection on the power device on the main power loop.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a failure detection circuit and a failure detection device for a power device on a main power loop, which can judge and alarm in time when the power device on the main power loop fails, so as to achieve the aim of protecting equipment.
The utility model provides a failure detection circuit of a power device on a main power loop, which comprises a voltage acquisition circuit, an MCU and an alarm circuit, wherein the voltage acquisition circuit is connected with the input end of the MCU, the alarm circuit is connected with the output end of the MCU, the voltage acquisition circuit comprises a first voltage acquisition circuit and a second voltage acquisition circuit, the first voltage acquisition circuit is used for acquiring a first voltage value of the power device, which is close to one end of a storage battery, and the second voltage acquisition circuit is used for acquiring a second voltage value of the power device, which is close to one end of a charger.
In one possible implementation, the alarm circuit includes:
the control end of the alarm switch element is connected with the output end of the MCU; if the MCU judges that the power device is normal according to the voltage values at two ends of the power device acquired by the voltage acquisition circuit, a first control signal for controlling the alarm switch element to be disconnected is sent; and if the MCU judges that the power device is abnormal according to the voltage values at the two ends of the power device acquired by the voltage acquisition circuit, a second control signal for controlling the alarm switch element to be conducted is sent.
In one possible implementation, the power device includes one or more of a fuse, a sampling resistor, and a charge-discharge MOS transistor disposed on the main power loop.
In a possible implementation manner, if the voltage values of the two ends of the power device collected by the voltage collection circuit are the same, the MCU judges that the power device is normal; and if the voltage values of the two ends of the power device acquired by the voltage acquisition circuit are different, the MCU judges that the power device is abnormal.
In one possible implementation, the first voltage acquisition circuit includes:
the first voltage dividing circuit comprises a first resistor R1, a third resistor R3 and a fifth resistor R5 which are connected in series, wherein the first resistor R1 is connected to one end, close to the storage battery, of the power acquisition device, and the fifth resistor R5 is grounded;
the first amplifying circuit comprises a first operational amplifier, wherein the non-inverting input end of the first operational amplifier is connected between the third resistor R3 and the fifth resistor R5, the inverting input end of the first operational amplifier is grounded through a seventh resistor R7, the output end of the first operational amplifier is connected with a first ADC pin of the MCU, and an eighth resistor R8 is connected between the output end of the first operational amplifier and the inverting input end of the first operational amplifier.
In one possible implementation, the second voltage acquisition circuit includes:
the second voltage dividing circuit comprises a second resistor R2, a fourth resistor R4 and a sixth resistor R6 which are connected in series, wherein the second resistor R2 is connected to one end, close to a charger, of the power acquisition device, and the sixth resistor R6 is grounded;
the second amplifying circuit comprises a second operational amplifier, wherein the non-inverting input end of the second operational amplifier is connected between the fourth resistor R4 and the sixth resistor R6, the inverting input end of the second operational amplifier is grounded through a ninth resistor R9, the output end of the second operational amplifier is connected with a second ADC pin of the MCU, and a tenth resistor R10 is connected between the output end of the second operational amplifier and the inverting input end of the second operational amplifier.
In one possible implementation manner, the alarm switch element is a third triode Q3 of PNP type, a base electrode of the third triode Q3 is connected to the output end of the MCU through a thirteenth resistor R13, an emitter electrode of the third triode Q is connected to a power supply through a fourteenth resistor R14, and a collector electrode of the third triode Q is grounded through a buzzer.
In a possible implementation manner, the buzzer is connected in parallel with a first diode D1, the anode of the first diode D1 is connected with the output end of the buzzer, and the cathode of the first diode D1 is connected with the input end of the buzzer.
In a possible implementation manner, the first ADC pin of the MCU is grounded via the third capacitor C3, and the first ADC pin of the MCU is connected to the output terminal of the first operational amplifier via the eleventh resistor R11; the second ADC pin of the MCU is grounded through a fourth capacitor C4, and the second ADC pin of the MCU is connected with the output end of the second operational amplifier through a twelfth resistor R12.
The utility model provides a failure detection device of a power device on a main power loop, which adopts any failure detection circuit of the power device on the main power loop.
Compared with the prior art, the utility model has the beneficial effects that:
according to the failure detection circuit and the failure detection device for the power device on the main power circuit, the voltage values of the two ends of the power element are collected in real time through the voltage sampling circuit, and the MCU judges whether the power device fails or not according to the voltage values of the two ends of the power element collected in real time through the voltage sampling circuit, wherein if the voltage values of the two ends of the power device collected by the voltage sampling circuit are the same, the MCU judges that the power device is normal; if the voltage values of the two ends of the power device collected by the voltage collecting circuit are different, the MCU judges that the power device is abnormal and controls the alarm circuit to alarm, so that the purpose of protecting equipment is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a circuit diagram of a power device failure detection circuit on a main power loop according to an embodiment of the present utility model;
fig. 2 shows a circuit diagram of detecting whether the fuse F1 fails by the failure detection circuit according to the embodiment of the present utility model.
Description of main reference numerals:
1. voltage acquisition circuit 2, MCU,3, alarm circuit.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In view of the technical problems set forth in the background art, the utility model provides a failure detection circuit and a failure detection device for a power device on a main power loop, which can judge and alarm in time when the power device on the main power loop fails, so as to achieve the aim of protecting equipment.
Referring to fig. 1 of the specification, the failure detection circuit of a power device on a main power loop provided by an embodiment of the utility model comprises a voltage acquisition circuit 1, an MCU2 and an alarm circuit 3, wherein the power device is arranged between a storage battery and a charger on the main power loop, the voltage acquisition circuit 1 comprises a first voltage acquisition circuit and a second voltage acquisition circuit, the first voltage acquisition circuit is used for acquiring a first voltage value of the power device near one end of the storage battery, and the second voltage acquisition circuit is used for acquiring a second voltage value of the power device near one end of the charger; the input end of the MCU2 is connected to a first voltage acquisition circuit and a second voltage acquisition circuit, and is used for judging whether the power device fails or not according to the voltage values of the two ends of the power device acquired by the voltage acquisition circuit; the alarm circuit 3 is connected with the output end of the MCU2, and is used for alarming according to the control signal sent by the MCU2 after judging that the power device fails.
The power device comprises one or more of a fuse, a sampling resistor and a charge-discharge MOS tube which are arranged on a main power loop. When the fuse is normal, the resistance value is ignored, and when the fuse is abnormal, the impedance becomes infinite; when the sampling resistor is normal, the resistance value is milliohm level and can be ignored, and when the sampling resistor is abnormal, the resistance value is increased; when the charge-discharge MOS tube is normally conducted, the charge-discharge MOS tube is regarded as a short circuit, and if the charge-discharge MOS tube is normally conducted, the charge-discharge MOS tube is abnormally sent to be turned off, the charge-discharge MOS tube is regarded as an open circuit. Therefore, when the fuse, the sampling resistor or the charge-discharge MOS tube is normally conducted, the voltage values at the two ends of the fuse, the sampling resistor or the charge-discharge MOS tube are the same.
Then, after the first voltage acquisition circuit and the second voltage acquisition circuit transmit the acquired voltage values at two ends of the power device to the MCU, if the MCU detects that the voltage values at two ends of the power device are the same, judging that the power device is normal; if the MCU detects that the voltage values at the two ends of the power device are different, the power device is judged to be normal.
In an embodiment, the alarm circuit 3 comprises an alarm switch element connected with a buzzer, and a control end of the alarm switch element is connected with an output end of the MCU 2; if the MCU2 judges that the power device is normal, a first control signal for controlling the alarm switch element to be disconnected is sent, and the buzzer is forbidden to alarm; and if the MCU2 judges that the power device is abnormal, a second control signal for controlling the on of the alarm switch element is sent to alarm the buzzer, so that maintenance personnel is prompted to replace the power element.
In one embodiment, referring to fig. 2 of the specification, the failure detection circuit provided by the present utility model detects whether the fuse F1 fails. The first voltage acquisition circuit is used for acquiring a first voltage value of the fuse F1, which is close to one end of the storage battery BAT+, and the second voltage acquisition circuit is used for acquiring a second voltage value of the fuse F1, which is close to one end of the charger PACK+. The first voltage acquisition circuit comprises a first voltage division circuit and a first amplifying circuit, the first voltage division circuit comprises a first resistor R1, a third resistor R3 and a fifth resistor R5 which are connected in series, the first resistor R1 is connected to one end of the acquisition fuse F1, which is close to the storage battery, and the fifth resistor R5 is grounded; the first amplifying circuit comprises a first operational amplifier, wherein the non-inverting input end of the first operational amplifier is connected between the third resistor R3 and the fifth resistor R5, the inverting input end of the first operational amplifier is grounded through a seventh resistor R7, the output end of the first operational amplifier is connected with the first ADC pin of the MCU, and an eighth resistor R8 is connected between the output end and the inverting input end of the first operational amplifier. The second voltage acquisition circuit comprises a second voltage division circuit and a second amplifying circuit, the second voltage division circuit comprises a second resistor R2, a fourth resistor R4 and a sixth resistor R6 which are connected in series, the second resistor R2 is connected to one end of the acquisition fuse F1, which is close to the charger, and the sixth resistor R6 is grounded; the second amplifying circuit comprises a second operational amplifier, the non-inverting input end of the second operational amplifier is connected between the fourth resistor R4 and the sixth resistor R6, the inverting input end of the second operational amplifier is grounded through a ninth resistor R9, the output end of the second operational amplifier is connected with the second ADC pin of the MCU, and a tenth resistor R10 is connected between the output end and the inverting input end of the second operational amplifier. The alarm switch element is a third triode Q3 with PNP, the base electrode of the third triode Q3 is connected with the output end of the MCU through a thirteenth resistor R13, the emitter of the third triode Q3 is connected with a power supply VCC2 through a fourteenth resistor R14, and the collector of the third triode Q3 is grounded through a buzzer P1.
Further, the first ADC pin of the MCU2 is grounded through a third capacitor C3, and the first ADC pin of the MCU2 is connected to the output end of the first operational amplifier through an eleventh resistor R11; the second ADC pin of the MCU is grounded through a fourth capacitor C4, and the second ADC pin of the MCU2 is connected to the output terminal of the second operational amplifier through a twelfth resistor R12. The eleventh resistor R11 and the third capacitor C3 filter the first ADC pin of the MCU2, and the twelfth resistor R12 and the fourth capacitor C4 filter the second ADC pin of the MCU 2.
Further, the buzzer P1 is connected in parallel with a first diode D1, an anode of the first diode D1 is connected with an output end of the buzzer P1, and a cathode of the first diode D1 is connected with an input end of the buzzer P1. This is because the buzzer P1 is an inductive device, and the first diode D1 can be used as a freewheeling diode of the buzzer P1 to provide a bleed circuit for the reverse electromotive force, so as to avoid damaging the third triode Q3.
In addition, the failure detection circuit of the power device on the main power loop provided by the utility model further comprises a power supply module for supplying power to the MCU2, the first operational amplifier and the second operational amplifier.
In this embodiment, let the voltage value of the fuse F1 near the battery BAT end be U1, the voltage value near the charger end be U2, the voltage value of the non-inverting input end of the first operational amplifier be U3, the voltage value of the non-inverting input end of the second operational amplifier be U4, the voltage value of the output end of the first operational amplifier be U5, the voltage value of the output end of the second operational amplifier be U6, wherein u3=u1×r5/(r1+r3+r5), u4=u2×r6/(r2+r4+r6).
Taking a 4S lithium iron phosphate battery as an example, the battery voltage is recorded as 13.5V under full charge, and r1=r2=100k, r3=r4=10k, r5=r6=10k, r7=r8=r9=r10=100deg.C is taken as the battery, and the gains of the first operational amplifier and the second operational amplifier are both 2.
When the 4S lithium iron phosphate battery discharges, the current flow direction is BAT+ to PACK+, when the fuse F1 is normal, the voltage value U3 of the non-inverting input end of the first operational amplifier is 1.125V as the voltage value U4 of the non-inverting input end of the second operational amplifier, the voltage value U5 of the output end of the first operational amplifier is 2.25V as the voltage value U6 of the output end of the second operational amplifier, and in the range of 0-3.3V of the first ADC pin and the second ADC pin of the MCU2, the MCU judges that the fuse F1 is normal at the moment, outputs high level to the base electrode of the third triode Q3, controls the third triode Q3 to be disconnected, and inhibits the buzzer alarm; when the fuse F1 fails, the impedance is infinite and is regarded as an open circuit, the voltage value U3 of the non-inverting input end of the first operational amplifier is 1.125V, the voltage value U4 of the non-inverting input end of the second operational amplifier is zero, the voltage value U5 of the output end of the first operational amplifier is 2.25V, the voltage value U6 of the output end of the second operational amplifier is zero, at the moment, the MCU judges that the fuse F1 is abnormal, outputs a low level to the base electrode of the third triode Q3, controls the third triode Q3 to be conducted, and the buzzer alarms to prompt maintenance personnel to overhaul.
When the charger charges a 4S lithium iron phosphate battery, the current flows from PACK+ to BAT+, the voltage of the charger is 14.8V, the voltage value U3 of the non-inverting input end of the first operational amplifier is 1.23V as the voltage value U4 of the non-inverting input end of the second operational amplifier, the voltage value U5 of the output end of the first operational amplifier is 2.46V as the voltage value U6 of the output end of the second operational amplifier, and in the range of 0-3.3V of the first ADC pin and the second ADC pin of the MCU2, the MCU determines that the fuse F1 is normal at the moment, outputs high level to the base electrode of the third triode Q3, controls the third triode Q3 to be disconnected, and inhibits the buzzer from alarming; when the fuse F1 fails, the voltage at the two sides of the fuse F1 is as high as: u1=13.5v full power (SOC 100%), u2=14.8v; u3=1.125v, u4=1.23v, u5=2.25v, u6=2.26v, at this time, the MCU judges that the fuse F1 is abnormal, outputs a low level to the base of the third triode Q3, controls the third triode Q3 to be turned on, alarms the buzzer, and prompts maintenance personnel to overhaul.
In other embodiments, the failure detection circuit of the power device on the main power circuit provided by the utility model can also be used for detecting whether the sampling resistor Rsen and the charge-discharge MOS transistors Q1 and Q2 are abnormal, and the detection principle is similar to the working principle of detecting whether the fuse F1 is abnormal or not, and is not repeated herein.
According to the failure detection circuit of the power device on the main power loop, provided by the utility model, the voltage values at the two ends of the power element are collected in real time, whether the power element is abnormal or not is detected by judging whether the voltage values at the two ends of the power element are the same, and if the power element is abnormal, a timely alarm is given, so that a worker is prompted to overhaul or the system is directly closed, and the effect of protecting equipment is achieved.
The utility model also provides a failure detection device of the power device on the main power loop, which adopts the failure detection circuit of the power device on the main power loop to solve the risk caused by misuse of a power supply with lower than standard voltage for charging. Because the principle of the control device in the embodiment of the present utility model for solving the problem is similar to that of the control circuit in the embodiment of the present utility model, the implementation of the control device may refer to the implementation of the control circuit, and the repetition is not repeated.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (10)
1. The utility model provides a failure detection circuit of power device on main power return circuit, its characterized in that includes voltage acquisition circuit, MCU and warning circuit, voltage acquisition circuit with MCU's input is connected, warning circuit with MCU's output is connected, and voltage acquisition circuit includes first voltage acquisition circuit and second voltage acquisition circuit, first voltage acquisition circuit is used for gathering the first voltage value that power device is close to battery one end, second voltage acquisition circuit is used for gathering the second voltage value that power device is close to battery one end.
2. The power device failure detection circuit of claim 1, wherein the alarm circuit comprises:
the control end of the alarm switch element is connected with the output end of the MCU; if the MCU judges that the power device is normal according to the voltage values at two ends of the power device acquired by the voltage acquisition circuit, a first control signal for controlling the alarm switch element to be disconnected is sent; and if the MCU judges that the power device is abnormal according to the voltage values at the two ends of the power device acquired by the voltage acquisition circuit, a second control signal for controlling the alarm switch element to be conducted is sent.
3. The circuit of claim 1, wherein the power device comprises one or more of a fuse, a sampling resistor, and a charge-discharge MOS tube disposed on the main power loop.
4. The failure detection circuit of a power device on a main power loop according to claim 2, wherein if the voltage values of two ends of the power device collected by the voltage collection circuit are the same, the MCU judges that the power device is normal; and if the voltage values of the two ends of the power device acquired by the voltage acquisition circuit are different, the MCU judges that the power device is abnormal.
5. The power device failure detection circuit of claim 4, wherein the first voltage acquisition circuit comprises:
the first voltage dividing circuit comprises a first resistor R1, a third resistor R3 and a fifth resistor R5 which are connected in series, wherein the first resistor R1 is connected to one end, close to the storage battery, of the power acquisition device, and the fifth resistor R5 is grounded;
the first amplifying circuit comprises a first operational amplifier, wherein the non-inverting input end of the first operational amplifier is connected between the third resistor R3 and the fifth resistor R5, the inverting input end of the first operational amplifier is grounded through a seventh resistor R7, the output end of the first operational amplifier is connected with a first ADC pin of the MCU, and an eighth resistor R8 is connected between the output end of the first operational amplifier and the inverting input end of the first operational amplifier.
6. The power device failure detection circuit of claim 5, wherein the second voltage acquisition circuit comprises:
the second voltage dividing circuit comprises a second resistor R2, a fourth resistor R4 and a sixth resistor R6 which are connected in series, wherein the second resistor R2 is connected to one end, close to a charger, of the power acquisition device, and the sixth resistor R6 is grounded;
the second amplifying circuit comprises a second operational amplifier, wherein the non-inverting input end of the second operational amplifier is connected between the fourth resistor R4 and the sixth resistor R6, the inverting input end of the second operational amplifier is grounded through a ninth resistor R9, the output end of the second operational amplifier is connected with a second ADC pin of the MCU, and a tenth resistor R10 is connected between the output end of the second operational amplifier and the inverting input end of the second operational amplifier.
7. The failure detection circuit of power device on main power loop according to claim 6, wherein the alarm switch element is a third triode Q3 of PNP type, the base of the third triode Q3 is connected with the output end of the MCU through a thirteenth resistor R13, the emitter of the third triode Q is connected with the power supply through a fourteenth resistor R14, and the collector of the third triode Q3 is grounded through the buzzer.
8. The failure detection circuit of power device on main power loop according to claim 7, wherein the buzzer is connected in parallel with a first diode D1, the anode of the first diode D1 is connected with the output end of the buzzer, and the cathode of the first diode D1 is connected with the input end of the buzzer.
9. The failure detection circuit of a power device on a main power loop according to claim 8, wherein a first ADC pin of the MCU is grounded via a third capacitor C3, and the first ADC pin of the MCU is connected to an output terminal of the first operational amplifier via an eleventh resistor R11; the second ADC pin of the MCU is grounded through a fourth capacitor C4, and the second ADC pin of the MCU is connected with the output end of the second operational amplifier through a twelfth resistor R12.
10. A failure detection device for a power device on a main power loop, comprising the failure detection circuit for a power device on a main power loop according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320598766.9U CN219625634U (en) | 2023-03-23 | 2023-03-23 | Failure detection circuit and device for power device on main power loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320598766.9U CN219625634U (en) | 2023-03-23 | 2023-03-23 | Failure detection circuit and device for power device on main power loop |
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| CN219625634U true CN219625634U (en) | 2023-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117452176A (en) * | 2023-12-25 | 2024-01-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Device power resistance test system, method and fixture |
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2023
- 2023-03-23 CN CN202320598766.9U patent/CN219625634U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117452176A (en) * | 2023-12-25 | 2024-01-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Device power resistance test system, method and fixture |
| CN117452176B (en) * | 2023-12-25 | 2024-04-02 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Device power resistance test system, method and fixture |
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