CN214374979U - Current detection device - Google Patents
Current detection device Download PDFInfo
- Publication number
- CN214374979U CN214374979U CN202120340401.7U CN202120340401U CN214374979U CN 214374979 U CN214374979 U CN 214374979U CN 202120340401 U CN202120340401 U CN 202120340401U CN 214374979 U CN214374979 U CN 214374979U
- Authority
- CN
- China
- Prior art keywords
- resistor
- control
- current
- terminal
- module
- 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.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The application provides a current detection device, which comprises a control module and a driving module; the control module comprises a first control end and a first detection end; the driving module comprises a driving unit and a conversion unit, the input end of the driving unit is connected with the first control end, the voltage feedback end of the driving unit is connected with the first detection end, the power supply end of the driving unit is connected with the power supply, the output end of the driving unit is connected with the voltage input end of the load module, the first end of the conversion unit is connected with the voltage feedback end of the driving unit, and the second end of the conversion unit is grounded; the control module calculates a current value of the load module according to the resistance value of the conversion unit and the voltage value of the first detection end. The current detection device can detect the current in the load module by using the driving unit and the conversion unit, so that the current in the load module can be accurately detected, the control cost is reduced, and the reliability of current detection is improved.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a current detection device.
Background
With the continuous development of the automobile industry, the electromagnetic valve driving of the separating device is more and more important, and therefore, the requirements for detecting and controlling the current in the solenoid of the electromagnetic valve are more accurate.
At present, an electromagnetic valve is widely used in the technical field of power driving, and because the electromagnetic valve has large inductive reactance and good impact resistance, a control module generally sends a PWM signal to the electromagnetic valve, and then collects working current flowing through the electromagnetic valve to compare whether the working current reaches a target current. The collection of the working current is generally collected in a resistance sampling mode, namely, the voltage and the current are monitored by adopting a resistor and are input to the MCU through the operational amplifier, so that the differential operational amplifier amplifies the current and the voltage, the use cost is increased, and the safety is relatively low.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a current detection device, can utilize drive unit and converting unit to detect the electric current in the load module, realize the accurate detection of electric current in the load module, solved the unable problem of accurate detection load module in the electric current size.
The embodiment of the application provides a current detection device, which comprises a control module and a driving module; the control module comprises a first control end and a first detection end; the driving module comprises a driving unit and a conversion unit, the input end of the driving unit is connected with the first control end, the feedback end of the driving unit is connected with the first detection end, the power supply end of the driving unit is connected with a power supply, the output end of the driving unit is connected with the voltage input end of the load module, the first end of the conversion unit is connected with the voltage feedback end of the driving unit, and the second end of the conversion unit is grounded; the control module calculates a current value of the load module according to the resistance value of the conversion unit and the voltage value of the first detection end.
In one embodiment, the conversion unit includes: one or more resistors are connected in series.
In one embodiment, the driving module further comprises: a control end of the first switch element is connected with the first control end, a first path end of the first switch element is connected with an input end of the driving unit, and a second path end of the first switch element is grounded; and a first end of the second resistor is connected with a first reference power supply, and a second end of the second resistor is connected with a first pass end of the first switching element.
In one embodiment, the driving module further comprises: a first end of the third resistor is connected with a second reference power supply, and a second end of the third resistor is connected with a control end of the first switch element; the first end of the fourth resistor is connected with the first control end, and the second end of the fourth resistor is connected with the control end of the first switching element; the first end of the fifth resistor is connected with the control end of the first switching element, and the second end of the fifth resistor is connected with the second path end of the first switching element; and/or a sixth resistor, wherein a first end of the sixth resistor is connected with the first path of the first switching element, and a second end of the sixth resistor is connected with the input end of the driving unit.
In one embodiment, the driving module further comprises: a first end of the first capacitor is connected with the first detection end, and a second end of the first capacitor is grounded; and/or a seventh resistor, wherein a first end of the seventh resistor is connected with the first detection end, and a second end of the seventh resistor is connected with the feedback end of the driving unit.
In one embodiment, the load module includes: the first end of the electromagnetic valve is connected with the output end of the driving unit; the anode of the diode is connected with the second end of the electromagnetic valve, and the cathode of the diode is connected with the first end of the electromagnetic valve; and/or an eighth resistor, wherein the first end of the eighth resistor is connected with a third reference power supply, and the second end of the eighth resistor is connected with the first end of the electromagnetic valve.
In one embodiment, the control module further comprises a second detection end, and the second detection end is connected with the second end of the electromagnetic valve; the load module further includes: a first end of the ninth resistor is connected with the second end of the solenoid valve, and a second end of the ninth resistor is grounded; a tenth resistor, wherein a first end of the tenth resistor is connected with a second end of the solenoid valve, and a second end of the tenth resistor is connected with the second detection end; and the first end of the second capacitor is connected with the second detection end, and the second end of the second capacitor is grounded.
In an embodiment, the control module further includes a second control terminal, and the second control terminal is connected to the current adjusting module and configured to output a pulse width modulation signal with a corresponding duty ratio according to a current value of the load module, so as to adjust a current magnitude of the load module; the current regulation module includes: and the control end of the switch unit is connected with the second control end, the first path end of the switch unit is connected with the voltage output end of the load module, and the second path end of the switch unit is grounded.
In one embodiment, the current regulation module further comprises: a control end of the second switch element is connected with the second control end, a first path end of the second switch element is connected with the control end of the switch unit, and a second path end of the second switch element is grounded; and a first end of the eleventh resistor is connected with a fourth reference power supply, and a second end of the eleventh resistor is connected with the first pass end of the second switching element.
In one embodiment, the current regulation module further comprises: a first end of the twelfth resistor is connected with a fifth reference power supply, and two ends of the eleventh resistor are connected with the control end of the second switch element; the first end of the third capacitor is connected with the control end of the switch unit, and the second end of the third capacitor is grounded; and/or a thirteenth resistor, a first end of the thirteenth resistor being connected to the first path end of the second switching element, and a second end of the thirteenth resistor being connected to the control end of the switching unit; and/or a fourteenth resistor, a first end of the fourteenth resistor is connected to the second control end, and a second end of the fourteenth resistor is connected to the control end of the second switching element; and/or a fifteenth resistor, wherein a first end of the fifteenth resistor is connected with the control end of the second switching element, and a second end of the fifteenth resistor is grounded.
The current detection device provided by the application can directly obtain the current value in the load module through the driving module, namely the control module calculates the current in the load module by utilizing the voltage value of the first detection end and the resistance value of the conversion unit, so that the accurate detection of the current in the load module is realized, the control cost is reduced, and the reliability of current detection is improved.
Drawings
Fig. 1 is a view of an application scenario of a current detection apparatus according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a current detection device according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a current detection device according to an embodiment of the present application;
fig. 4 is a schematic circuit diagram of a current detection device according to an embodiment of the present application;
fig. 5 is a circuit diagram of a load module according to an embodiment of the present application;
fig. 6 is a circuit schematic diagram of a current regulation module according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a view of an application scenario of a current detection apparatus according to an embodiment of the present application. As shown in fig. 1, the current detection device 11 provided by the present application may be connected to a load module 12 and a current regulation module 13, where the load module 12 is connected to the current regulation module 13.
The current detection device 11 detects a current value in the load module 12 while providing a voltage to the load module 12, calculates a duty ratio value according to the current value, and controls the current value in the load module 12 through the current adjustment module 13, thereby realizing accurate detection of the current in the load module 12, reducing the control cost, and improving the reliability of current detection.
Referring to fig. 2, a current detection apparatus 11 includes a control module 110 and a driving module 120. The control module 110 includes a first control terminal 111 and a first detection terminal 112. The driving module 120 includes a driving unit 121 and a converting unit 122, an input end of the driving unit 121 is connected to the first control end 111, a feedback end of the driving unit 121 is connected to the first detection end 112, a power end of the driving unit 121 is connected to a power supply, an output end of the driving unit 121 is connected to a voltage input end of the load module 12, a first end of the converting unit 122 is connected to a voltage feedback end of the driving unit 121, and a second end of the converting unit 122 is grounded. The control module 110 calculates a current value of the load module 12 according to the resistance value of the converting unit 122 and the voltage value of the first detecting terminal 112.
Specifically, when the control module 110 controls the first control terminal 111 to output a low level to the driving module 120, the driving unit 121 starts to operate, and inputs a voltage signal of the power supply to the load module 12, and at the same time, the control module 110 detects the voltage value of the load module 12 through the first detection terminal 112, and according to the resistance value of the conversion unit 122 and the internal mechanism (voltage value is equal to resistance value/current value/550) of the driving unit 121. For example, when the resistance of the conversion unit 122 is 200 ohms, the driving unit is model: when the voltage value measured by the first detection terminal 112 of the VN7140ASTR chip is 3V, the current value of the load module 12 is equal to 8.25A. The conversion unit 122 functions to convert the current signal output from the feedback terminal of the driving unit 121 into a voltage signal.
In one embodiment, the conversion unit 121 includes: one or more resistors are connected in series. Specifically, when the converting unit 121 includes only one resistor R1, the resistance value of the converting unit 121 is equal to the resistor R1; when the conversion unit 121 includes a plurality of resistors connected in series, the resistance value of the conversion unit 121 is equal to the sum of the resistance values of the plurality of resistors.
In an embodiment, as shown in fig. 3, the driving module 120 may further include, in addition to the current detection device 11: a first switching element Q1, and a second resistor R2. A control terminal of the first switching element Q1 is connected to the first control terminal 111, a first path terminal of the first switching element Q1 is connected to the input terminal of the driving unit 121, and a second path terminal of the first switching element Q1 is grounded. A first terminal of the second resistor R2 is connected to the first reference power source, and a second terminal of the second resistor R2 is connected to a first path terminal of the first switching element Q1.
Specifically, the control signal of the first control terminal 111 is converted into the control signal with the same level as the first reference power supply through the switching action of the first switching element Q1 to meet the input level requirement of the driving unit 121, and is input to the input terminal of the driving unit 121, and the output terminal of the driving unit 121 pair outputs the voltage signal of the power supply to drive the load module 12 to operate. The first reference power source may be, but is not limited to, a +5V power source.
In one embodiment, as shown in fig. 4, the driving module 120 further includes, in addition to the current detection device 11: the third resistor R3 and/or the fourth resistor R4 and/or the fifth resistor R5 and/or the sixth resistor R6. A first terminal of the third resistor R3 is connected to the second reference power source, and a second terminal of the third resistor R3 is connected to a control terminal of the first switching element Q1. A first terminal of the fourth resistor R4 is connected to the first control terminal 111, and a second terminal of the fourth resistor R4 is connected to the control terminal of the first switching element Q1. A first terminal of the fifth resistor R5 is connected to the control terminal of the first switching element Q1, and a second terminal of the fifth resistor R5 is connected to the second path terminal of the first switching element Q1; a first terminal of the sixth resistor R6 is connected to the first path of the first switching element Q1, and a second terminal of the sixth resistor R6 is connected to the input terminal of the driving unit 121.
In one embodiment, as shown in fig. 4, the driving module 120 further includes, in addition to the current detection device 11: a first capacitor C1 and/or a seventh resistor R7. The first terminal of the first capacitor C1 is connected to the first detection terminal 112, and the second terminal of the first capacitor C1 is connected to ground. A first terminal of the seventh resistor R7 is connected to the first detection terminal 112, and a second terminal of the seventh resistor R7 is connected to the feedback terminal of the driving unit 121. Specifically, the first capacitor C1 performs a filtering function to make the voltage more stable.
In an embodiment, as shown in fig. 5, the load module 12 connected to the current detection device 11 may further include: solenoid valve L1, diode D1, and/or eighth resistor R8. A first end of the solenoid valve L1 is connected to an output end of the driving unit 121. The anode of the diode D1 is connected to the second terminal of the solenoid valve L1, and the cathode of the diode D1 is connected to the first terminal of the solenoid valve L1. A first terminal of the eighth resistor R8 is connected to the third reference power source, and a second terminal of the eighth resistor R8 is connected to a first terminal of the solenoid valve L1. Specifically, the diode D1 has a freewheeling function, and may include, but is not limited to, only one diode D1, and may also include a plurality of diodes D1 connected in series.
In one embodiment, the control module 110 further includes a second sensing terminal 113, and the second sensing terminal 113 is connected to a second terminal of the solenoid valve L1. On the basis of the load module 12, the load module 12 may further include: a ninth resistor R9, a tenth resistor R10 and a second capacitor C2. A first end of the ninth resistor R9 is connected to the second end of the solenoid valve L1, and a second end of the ninth resistor R9 is grounded. A first end of the tenth resistor R10 is connected to the second end of the solenoid valve L1, and a second end of the tenth resistor R10 is connected to the second detection terminal 113. The first terminal of the second capacitor C2 is connected to the second detection terminal 113, and the second terminal of the second capacitor C2 is grounded. Specifically, the first detection terminal 113 outputs a low level signal to the control module 110 when the circuit is normal and has no fault after the ECU initialization is finished. The electromagnetic valve L1 and the ninth resistor R9 form a sampling circuit, and the second capacitor C2 plays a role in stabilizing current, so that the second detection end 113 can obtain a stable analog current signal.
In an embodiment, the control module 110 further includes a second control terminal 114, and the second control terminal 114 is connected to the current regulating module 13 and configured to output a pulse width modulation signal with a corresponding duty ratio according to the current value of the load module 12, so as to adjust the current magnitude of the load module 12. The current regulation module 13 includes: a switching unit 131. The control terminal of the switch unit 131 is connected to the second control terminal 114, the first path terminal of the switch unit 131 is connected to the voltage output terminal of the load module 131, and the second path terminal of the switch unit 131 is grounded. Specifically, the switch unit 131 is configured to control the magnitude of the current value in the load module 12, that is, when the switch unit 131 receives a high level signal, the current value in the load module 12 increases; when the switching unit 131 receives the low level signal, the current value in the load module 12 decreases. The switching unit 131 may be, but is not limited to, an N-channel MOS transistor with short-circuit protection, etc.
In an embodiment, as shown in fig. 6, on the basis of the current regulation module 13, the current regulation module may further include: a second switching element Q2 and an eleventh resistor R11. A control terminal of the second switching element Q2 is connected to the second control terminal 114, a first path terminal of the second switching element Q2 is connected to the control terminal of the switching unit 131, and a second path terminal of the second switching element Q2 is grounded. A first terminal of the eleventh resistor R11 is connected to the fourth reference power source, and a second terminal of the eleventh resistor R11 is connected to the first path terminal of the second switching element Q2. Specifically, the control signal of the second control terminal 114 is converted into the control signal with the same level as the fourth reference power supply through the switching action of the second switching element Q2 to meet the level input requirement of the switching unit 131, and is input to the control of the switching unit 131, and the switching unit 131 controls the first path and the second path to be connected, so as to increase the current value in the load module 12.
In an embodiment, on the basis of the current regulation module 13, the current regulation module may further include: a twelfth resistor R12 and/or a third capacitor C3 and/or a thirteenth resistor R13 and/or a fourteenth resistor R14 and/or a fifteenth resistor R15. A first terminal of the twelfth resistor R12 is connected to the fifth reference power supply, and two terminals of the twelfth resistor R12 are connected to the control terminal of the second switching element Q2. A first terminal of the third capacitor C3 is connected to the control terminal of the switch unit 131, and a second terminal of the third capacitor C3 is grounded. A first terminal of the thirteenth resistor R13 is connected to the first path terminal of the second switching element Q2, and a second terminal of the thirteenth resistor R13 is connected to the control terminal of the switching unit 131. A first terminal of the fourteenth resistor R14 is connected to the second control terminal 114, and a second terminal of the fourteenth resistor R14 is connected to the control terminal of the second switching element Q2. A first terminal of the fifteenth resistor R15 is connected to the control terminal of the second switching element Q2, and a second terminal of the fifteenth resistor R15 is grounded.
The current detection device provided by the embodiment of the application can calculate the current in the load module 12 by using the voltage value of the first detection terminal 112 and the resistance value of the conversion unit 122 through the control module 110, and output the pulse width modulation signal corresponding to the duty ratio according to the current value of the load module 12, thereby adjusting the current magnitude of the load module 12, thereby realizing accurate detection and control of the current in the load module 12, reducing the control cost, and improving the reliability of current detection.
The embodiment of the application also provides a solenoid valve control system which comprises the current detection device of the embodiment. Since the embodiment of the current detection device portion corresponds to the embodiment of the vehicle portion, please refer to the above embodiment of the current detection device portion for describing the embodiment of the vehicle portion, and no further description is provided herein.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, and a program that can be implemented by the hardware and can be instructed by the program to be executed by the relevant hardware may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic or optical disk, and the like.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being included within the following description of the preferred embodiment.
Claims (10)
1. The current detection device is characterized by comprising a control module and a driving module;
the control module comprises a first control end and a first detection end;
the driving module comprises a driving unit and a conversion unit, the input end of the driving unit is connected with the first control end, the feedback end of the driving unit is connected with the first detection end, the power supply end of the driving unit is connected with a power supply, the output end of the driving unit is connected with the voltage input end of the load module, the first end of the conversion unit is connected with the voltage feedback end of the driving unit, and the second end of the conversion unit is grounded;
the control module calculates a current value of the load module according to the resistance value of the conversion unit and the voltage value of the first detection end.
2. The current detection device according to claim 1, wherein the conversion unit includes: one or more resistors are connected in series.
3. The current detection device according to claim 1 or 2, wherein the driving module further comprises:
a control end of the first switch element is connected with the first control end, a first path end of the first switch element is connected with an input end of the driving unit, and a second path end of the first switch element is grounded;
and a first end of the second resistor is connected with a first reference power supply, and a second end of the second resistor is connected with a first pass end of the first switching element.
4. The current sensing device of claim 3, wherein the driving module further comprises:
a first end of the third resistor is connected with a second reference power supply, and a second end of the third resistor is connected with a control end of the first switch element; and/or
A first end of the fourth resistor is connected with the first control end, and a second end of the fourth resistor is connected with the control end of the first switch element; and/or
A first end of the fifth resistor is connected with the control end of the first switch element, and a second end of the fifth resistor is connected with the second path end of the first switch element; and/or
And a first end of the sixth resistor is connected with the first path of the first switching element, and a second end of the sixth resistor is connected with the input end of the driving unit.
5. The current sensing device of claim 1, wherein the driving module further comprises:
a first end of the first capacitor is connected with the first detection end, and a second end of the first capacitor is grounded; and/or
And a first end of the seventh resistor is connected with the first detection end, and a second end of the seventh resistor is connected with the feedback end of the driving unit.
6. The current sensing device of claim 1, wherein the load module comprises:
the first end of the electromagnetic valve is connected with the output end of the driving unit;
the anode of the diode is connected with the second end of the electromagnetic valve, and the cathode of the diode is connected with the first end of the electromagnetic valve; and/or
And a first end of the eighth resistor is connected with a third reference power supply, and a second end of the eighth resistor is connected with the first end of the electromagnetic valve.
7. The current sensing device of claim 6, wherein the control module further comprises a second sensing terminal connected to a second terminal of the solenoid valve;
the load module further includes:
a first end of the ninth resistor is connected with the second end of the solenoid valve, and a second end of the ninth resistor is grounded;
a tenth resistor, wherein a first end of the tenth resistor is connected with a second end of the solenoid valve, and a second end of the tenth resistor is connected with the second detection end;
and the first end of the second capacitor is connected with the second detection end, and the second end of the second capacitor is grounded.
8. The current detection device according to claim 1, wherein the control module further comprises a second control terminal, and the second control terminal is connected to the current regulation module and configured to output a pulse width modulation signal with a corresponding duty ratio according to the current value of the load module, so as to adjust the current magnitude of the load module;
the current regulation module includes:
and the control end of the switch unit is connected with the second control end, the first path end of the switch unit is connected with the voltage output end of the load module, and the second path end of the switch unit is grounded.
9. The current sensing device of claim 8, wherein the current regulation module further comprises:
a control end of the second switch element is connected with the second control end, a first path end of the second switch element is connected with the control end of the switch unit, and a second path end of the second switch element is grounded;
and a first end of the eleventh resistor is connected with a fourth reference power supply, and a second end of the eleventh resistor is connected with the first pass end of the second switching element.
10. The current sensing device of claim 9, wherein the current regulation module further comprises:
a first end of the twelfth resistor is connected with a fifth reference power supply, and two ends of the eleventh resistor are connected with the control end of the second switch element; and/or
A first end of the third capacitor is connected with the control end of the switch unit, and a second end of the third capacitor is grounded; and/or
A thirteenth resistor, a first end of which is connected to the first path end of the second switching element, and a second end of which is connected to the control end of the switching unit; and/or
A fourteenth resistor, a first terminal of the fourteenth resistor being connected to the second control terminal, and a second terminal of the fourteenth resistor being connected to the control terminal of the second switching element; and/or
And a fifteenth resistor, wherein a first end of the fifteenth resistor is connected with the control end of the second switching element, and a second end of the fifteenth resistor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120340401.7U CN214374979U (en) | 2021-02-05 | 2021-02-05 | Current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120340401.7U CN214374979U (en) | 2021-02-05 | 2021-02-05 | Current detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214374979U true CN214374979U (en) | 2021-10-08 |
Family
ID=77964210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120340401.7U Active CN214374979U (en) | 2021-02-05 | 2021-02-05 | Current detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214374979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946353A (en) * | 2021-02-05 | 2021-06-11 | 上海拿森汽车电子有限公司 | Current detection device and solenoid valve control system |
-
2021
- 2021-02-05 CN CN202120340401.7U patent/CN214374979U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946353A (en) * | 2021-02-05 | 2021-06-11 | 上海拿森汽车电子有限公司 | Current detection device and solenoid valve control system |
| CN112946353B (en) * | 2021-02-05 | 2024-04-19 | 上海拿森汽车电子有限公司 | Current detection device and electromagnetic valve control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7049879B2 (en) | Power supply circuit with control of rise characteristics of output voltage | |
| CN104218646B (en) | A kind of portable power source charging circuit | |
| CN104731146B (en) | Switching regulaor and electronic equipment | |
| US9131582B2 (en) | High efficiency LED driving circuit and driving method | |
| EP1679780B1 (en) | DC/DC converter with current limit protection | |
| US8061333B2 (en) | Circuit arrangement and method for operating an inductive load | |
| US10998712B2 (en) | Power supply control apparatus having a wire protection unit | |
| CN201113523Y (en) | Direct-current input -type charger | |
| CN113497559B (en) | Converter circuit, corresponding device and method | |
| CN214374979U (en) | Current detection device | |
| JP2888729B2 (en) | Output short circuit protection circuit | |
| CN108933527A (en) | Output over-voltage for converter is protected | |
| US10574138B2 (en) | Power converter, power converting system, and power converter control method | |
| CN109586566B (en) | In-vehicle determination circuit and in-vehicle power supply device | |
| CN212812090U (en) | Overvoltage protection circuit | |
| US10333452B2 (en) | Control apparatus and method for sensing overcurrent of DC motor of vehicle | |
| US8476877B2 (en) | Fuel cell system and power management method thereof | |
| CN112946353B (en) | Current detection device and electromagnetic valve control system | |
| CN106711935B (en) | Overvoltage protection circuit and load voltage regulating circuit | |
| CN216387198U (en) | Overcurrent detection circuit and device | |
| CN212781805U (en) | Current regulation circuit, cabin system and vehicle | |
| CN219706905U (en) | ECU power supply circuit and car | |
| CN220527674U (en) | Novel buck-boost hardware overcurrent protection circuit | |
| CN220857620U (en) | Power device overcurrent protection circuit and power converter | |
| CN213027804U (en) | Overvoltage protection device and switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |