CN207882357U - A kind of load control circuit with fault detection capability - Google Patents
A kind of load control circuit with fault detection capability Download PDFInfo
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- CN207882357U CN207882357U CN201820181105.5U CN201820181105U CN207882357U CN 207882357 U CN207882357 U CN 207882357U CN 201820181105 U CN201820181105 U CN 201820181105U CN 207882357 U CN207882357 U CN 207882357U
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- load
- control circuit
- switch module
- processing unit
- resistance
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Abstract
The utility model is suitable for control circuit field, provide a kind of load control circuit with fault detection capability, including switch module, feedback module, processing unit, wherein, switch module controls the break-make of load and power supply according to control signal, feedback module generates feedback signal according to the on off operating mode of load and switch module, processing unit then according to the feedback signal and control signal come judge load and switch module whether failure, to when load or switch module are broken down, it is able to know that specific trouble unit, facilitates carry out subsequent processing.
Description
Technical field
The utility model belongs to control circuit field more particularly to a kind of load control electricity with fault detection capability
Road.
Background technology
We can always use various electrical equipments in production and living, and load control is usually constructed in these electrical equipments
Circuit processed, usually all there are one switch modules for tool for load control circuit, by switch module come the on/off state to electric appliance
It is controlled.
In actual use, electric appliance always unavoidably breaks down, and the component for damaging and leading to apparatus failure most often occurs
It is exactly the load component of electric appliance and the switch module of load control circuit, but is often difficult to through outer viewing after these parts damages
Out, and existing load control circuit does not have fault detection capability so that electrical equipment is difficult to know after breaking down
Its specific damage component of road, is not easy to carry out subsequent processing to electrical equipment.
Utility model content
The utility model provides a kind of load control circuit with fault detection capability, it is intended to solve existing load control
Circuit processed does not have the problem of fault detection capability.
The utility model is realized in this way a kind of load control circuit with fault detection capability, including：Switching molding
Block, feedback module and processing unit；
The switch module is used for according to control signal, and control load is connected or disconnected with power supply；
Feedback module is used to, according to the on off operating mode of the load and the on off operating mode of switch module, generate feedback signal
And it is delivered to processing unit；
The processing unit according to the control signal and feedback signal judge it is described load and the switch module whether
Failure.
Preferably, the power supply is AC power；
One end of the load connects the firewire of the AC power, and the other end connects alternating current by the switch module
The zero curve in source；
The switch module includes a control terminal, and the control terminal receives the control signal；
The feedback module input terminal connection load the other end, the feedback module output end connection described in
Processing unit.
Preferably, the control terminal of the switch module is connect with the processing unit, is exported with receiving the processing unit
The control signal.
Preferably, the feedback module includes the first diode, the second diode and first resistor；
The cathode of first diode connects voltage source, the cathode of anode the second diode of connection；
The plus earth of second diode；
One end of the first resistor connects the anode of the first diode, and as the output end of the feedback module, separately
Input terminal of the one end as the feedback module.
Preferably, the load control circuit further includes second resistance, and the second resistance is arranged in series in the feedback
Between the output end of module and the processing unit.
Preferably, the load control circuit further includes 3rd resistor, and the 3rd resistor is arranged in series in the switch
Between the control terminal of module and the processing unit.
Preferably, the feedback module includes the first optocoupler, the 4th resistance and the 5th resistance；
The input side first end of first optocoupler connects one end of the 4th resistance, the connection exchange of input side second end
The zero curve of power supply, output end of the outlet side first end as the feedback module, outlet side second end ground connection；
One end of 5th resistance connects the outlet side first end, and the other end connects voltage source；
Input terminal of the other end of 4th resistance as the feedback module.
Preferably, the load control circuit further includes the second optocoupler, the 6th resistance and the 7th resistance；
The input side first end of second optocoupler connects the processing unit, input side second end ground connection, outlet side the
One end connects one end of the 6th resistance, and outlet side second end connects the control terminal of the switch module；
The other end of the other end connection load of 6th resistance；
One end of 7th resistance connects the input side first end, and the other end connects voltage source.
Preferably, the switch module is three-terminal switch component.
Preferably, the switch module is silicon-controlled or relay.
Load control circuit provided by the utility model with fault detection capability, including switch module, feedback module,
Processing unit, wherein switch module controls the break-make of load and power supply according to control signal, feedback module according to load and
The on off operating mode of switch module generates feedback signal, and processing unit then judges to load according to the feedback signal and control signal
Whether failure is able to know that specific trouble unit thus when load or switch module are broken down with switch module, convenient
Carry out subsequent processing.
Description of the drawings
A kind of Fig. 1 structural schematic diagrams of the load control circuit with fault detection capability provided by the utility model；
Fig. 2 is a kind of circuit of preferred load control circuit with fault detection capability provided by the utility model
Figure；
Fig. 3 is the circuit of another preferably load control circuit with fault detection capability provided by the utility model
Figure.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Load control circuit provided by the utility model with fault detection capability, including switch module, feedback module,
Processing unit, wherein switch module controls the break-make of load and power supply according to control signal, feedback module according to load and
The on off operating mode of switch module generates feedback signal, and processing unit then judges to load according to the feedback signal and control signal
Whether failure is able to know that specific trouble unit thus when load or switch module are broken down with switch module, convenient
Carry out subsequent processing.
As shown in Figure 1, in one embodiment of the utility model, the load control circuit packet with fault detection capability
Include switch module, feedback module and processing unit.
Wherein, switch module is used to carry out break-make variation according to control signal, connected with this controlling load and power supply or
Person disconnects, and feedback module is used for according to the on off operating mode of load and the on off operating mode of switch module, and generation feedback signal simultaneously will
The feedback signal is delivered to processing unit, and when electrical equipment irregular operating, processing unit can be according to control signal and anti-
Feedback signal judge load and switch module whether failure.
It should be understood that load can be consuming parts in electrical equipment, for example, electric heater heating device, electric heating
The heater etc. of kettle
By according to feedback signal and control signal come judge load and switch module whether failure, to loading or open
When pass module breaks down, it is able to know that specific trouble unit, facilitates carry out subsequent processing.
In the utility model embodiment, it is preferred that switch module can be used three-terminal switch component, such as silicon-controlled,
Triode and IGBT etc..
Further, switch module uses silicon-controlled or relay.
As shown in Fig. 2, in a preferred embodiment of the utility model, power supply is AC power, and one end of load connects
The firewire L of AC power is met, the other end is connected to switch module, and the zero curve N of AC power is connected by switch module, opens
It includes a control terminal G to close module, and control terminal G, which is used, receives control signal, the other end of the input terminal connection load of feedback module, instead
Present the output end connection processing unit of module.
It should be understood that common calculation process component, example in the circuits such as MCU, MPU, DSP may be used in processing unit
51 common microcontrollers of such as market, concrete type and model can be selected according to actual conditions, be not limited specifically.
In the utility model embodiment, the control terminal of switch module is connect with processing unit, defeated to receive processing unit
The control signal gone out.
In the utility model embodiment, feedback module includes the first diode D1, the second diode D2 and first resistor
The cathode of R1, the first diode D1 connect voltage source VCC, the cathode of the second diode D2 of anode connection；Second diode D2's
Plus earth GND；One end of first resistor R1 connects the anode of the first diode D1, and as the output end of feedback module, separately
Input terminal of the one end as feedback module.
Preferably, which further includes second resistance R2, and second resistance R2 is arranged in series in feedback module
Between output end and processing unit.
Preferably, which further includes 3rd resistor R3, and 3rd resistor R3 is arranged in series in switch module
Between control terminal and processing unit.
It is in the standby state when control signal control loads, then if load is normal channel status, due to
The one-way conduction of the first diode D1 and the second diode D2 act in feedback module, can be by the sine voltage signal of alternating current
It is converted into square wave voltage signal, processing unit will receive the square wave voltage signal from feedback unit.If load faulty
It disconnects, then what processing unit received will be constant voltage signal.Therefore according to standby control signal and the square wave received electricity
Signal or constant voltage signal, processing unit is pressed to may determine that load is in normal condition or malfunction with silicon-controlled.
Be off when silicon-controlled, load do not work, and control signal in order to control controlled silicon conducting when, if at this time bear
Normal ON is carried, switch module failure is not turned on, then loads and do not work, and processing unit can receive square wave voltage signal；If can
Silicon normally is controlled, load faulty disconnects, then loads and do not work, processing unit can receive constant voltage signal.Therefore basis
Controlled silicon conducting controls signal and the square wave voltage signal received or constant voltage signal, processing unit may determine that load
It is in normal condition or malfunction with silicon-controlled.
As shown in figure 3, in another preferred embodiment of the utility model, power supply is AC power, and one end of load connects
The firewire L of AC power is met, the other end is connected to switch module, and the zero curve N of AC power is connected by switch module, opens
It includes a control terminal, control terminal reception control signal, the other end of the input terminal connection load of feedback module, feedback to close module
The output end connection processing unit of module.
In the utility model embodiment, feedback module includes the first optocoupler U1, the 4th resistance R4 and the 5th resistance R5；The
The input side first end of one optocoupler U2 connects one end of the 4th resistance R4, and input side second end connects the zero curve N of AC power, defeated
Go out output end of the side first end as feedback module, outlet side second end is grounded GND；One end of 5th resistance R5 connects outlet side
First end, the other end connect voltage source VCC；Input terminal of the other end of 4th resistance R4 as feedback module.
Preferably, load control circuit further includes the second optocoupler U2, the 6th resistance R6 and the 7th resistance R7；Second optocoupler U2
Input side first end connection processing unit, input side second end be grounded GND, outlet side first end connect the 6th resistance R6 one
End, the control terminal of outlet side second end connecting valve module；The other end of the other end connection load of 6th resistance R6；7th electricity
The one end for hindering R7 connects input side first end, and the other end connects voltage source VCC.
It is in the standby state when control signal control loads, then if load is normal channel status, due to
The sine voltage signal of alternating current can be converted into square wave voltage signal by the effect of the first optocoupler U1 in feedback module, processing
Unit will receive the square wave voltage signal from feedback unit.If load faulty disconnects, what processing unit received
It will be constant voltage signal.Therefore according to standby control signal and the square wave voltage signal received or constant voltage signal, place
Reason unit may determine that load is in normal condition or malfunction with silicon-controlled.
Be off when silicon-controlled, load do not work, and control signal in order to control controlled silicon conducting when, if at this time bear
Normal ON is carried, switch module failure is not turned on, then loads and do not work, and processing unit can receive square wave voltage signal；If can
Silicon normally is controlled, load faulty disconnects, then loads and do not work, processing unit can receive constant voltage signal.Therefore basis
Controlled silicon conducting controls signal and the square wave voltage signal received or constant voltage signal, processing unit may determine that load
It is in normal condition or malfunction with silicon-controlled.
Load control circuit provided by the utility model with fault detection capability, including switch module, feedback module,
Processing unit, wherein switch module controls the break-make of load and power supply according to control signal, feedback module according to load and
The on off operating mode of switch module generates feedback signal, and processing unit then judges to load according to the feedback signal and control signal
Whether failure is able to know that specific trouble unit thus when load or switch module are broken down with switch module, convenient
Carry out subsequent processing.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of load control circuit with fault detection capability, which is characterized in that including：Switch module, feedback module and
Processing unit；
The switch module is used for according to control signal, and control load is connected or disconnected with power supply；
Feedback module is used for according to the on off operating mode of the load and the on off operating mode of switch module, and generation feedback signal is simultaneously defeated
It send to processing unit；
The processing unit according to the control signal and feedback signal judge it is described load and the switch module whether failure.
2. the load control circuit with fault detection capability as described in claim 1, which is characterized in that the power supply is to hand over
Galvanic electricity source；
One end of the load connects the firewire of the AC power, and the other end connects AC power by the switch module
Zero curve；
The switch module includes a control terminal, and the control terminal receives the control signal；
The other end of the input terminal connection load of the feedback module, the output end of the feedback module connect the processing
Unit.
3. the load control circuit with fault detection capability as claimed in claim 2, which is characterized in that the switch module
Control terminal connect with the processing unit, to receive the control signal of processing unit output.
4. the load control circuit with fault detection capability as claimed in claim 3, which is characterized in that the feedback module
Including the first diode, the second diode and first resistor；
The cathode of first diode connects voltage source, the cathode of anode the second diode of connection；
The plus earth of second diode；
One end of the first resistor connects the anode of the first diode, and as the output end of the feedback module, the other end
Input terminal as the feedback module.
5. the load control circuit with fault detection capability as claimed in claim 4, which is characterized in that the load control
Circuit further includes second resistance, the second resistance be arranged in series output end and the processing unit in the feedback module it
Between.
6. the load control circuit with fault detection capability as claimed in claim 5, which is characterized in that the load control
Circuit further includes 3rd resistor, the 3rd resistor be arranged in series control terminal and the processing unit in the switch module it
Between.
7. the load control circuit with fault detection capability as claimed in claim 2, which is characterized in that the feedback module
Including the first optocoupler, the 4th resistance and the 5th resistance；
The input side first end of first optocoupler connects one end of the 4th resistance, and input side second end connects AC power
Zero curve, output end of the outlet side first end as the feedback module, outlet side second end ground connection；
One end of 5th resistance connects the outlet side first end, and the other end connects voltage source；
Input terminal of the other end of 4th resistance as the feedback module.
8. the load control circuit with fault detection capability as claimed in claim 3, which is characterized in that the load control
Circuit further includes the second optocoupler, the 6th resistance and the 7th resistance；
The input side first end of second optocoupler connects the processing unit, input side second end ground connection, outlet side first end
One end of the 6th resistance is connected, outlet side second end connects the control terminal of the switch module；
The other end of the other end connection load of 6th resistance；
One end of 7th resistance connects the input side first end, and the other end connects voltage source.
9. the load control circuit with fault detection capability as described in claim 1, which is characterized in that the switch module
For three-terminal switch component.
10. the load control circuit with fault detection capability as described in claim 1, which is characterized in that the switching molding
Block is silicon-controlled or relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820181105.5U CN207882357U (en) | 2018-01-31 | 2018-01-31 | A kind of load control circuit with fault detection capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820181105.5U CN207882357U (en) | 2018-01-31 | 2018-01-31 | A kind of load control circuit with fault detection capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207882357U true CN207882357U (en) | 2018-09-18 |
Family
ID=63510717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820181105.5U Active CN207882357U (en) | 2018-01-31 | 2018-01-31 | A kind of load control circuit with fault detection capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207882357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412629A (en) * | 2020-03-30 | 2020-07-14 | 珠海格力电器股份有限公司 | Load control device, air conditioner and load control method of air conditioner |
-
2018
- 2018-01-31 CN CN201820181105.5U patent/CN207882357U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412629A (en) * | 2020-03-30 | 2020-07-14 | 珠海格力电器股份有限公司 | Load control device, air conditioner and load control method of air conditioner |
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