CN206211504U - The voltage protection circuit of electromagnetic oven - Google Patents
The voltage protection circuit of electromagnetic oven Download PDFInfo
- Publication number
- CN206211504U CN206211504U CN201621325295.0U CN201621325295U CN206211504U CN 206211504 U CN206211504 U CN 206211504U CN 201621325295 U CN201621325295 U CN 201621325295U CN 206211504 U CN206211504 U CN 206211504U
- Authority
- CN
- China
- Prior art keywords
- resistance
- amplifier
- potentiometer
- diode
- voltage
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses the voltage protection circuit of electromagnetic oven, including under-voltage protecting circuit and overvoltage crowbar, the under-voltage protecting circuit includes potentiometer RV3, amplifier U1, diode VD1, resistance R12 and electric capacity C20, electric capacity C20 one end is grounded, its another termination 220V voltage is connected with a fixing end of potentiometer RV3 simultaneously, another fixing end ground connection of potentiometer RV3, the sliding end of potentiometer RV3 is connected with the reverse input end of amplifier U1, the positive input of amplifier U1 is connected with output end, anode of the positive input of amplifier U1 also with diode VD1 is connected；The overvoltage crowbar includes potentiometer RV2, amplifier U2, diode VD2 and resistance R5, and one end of resistance R5 is connected on the circuit that electric capacity C20 is connected with potentiometer RV3, and its other end is connected with a fixing end of potentiometer RV2.The utility model simplifies voltage protection circuit, reduces volume of the voltage protection circuit in electromagnetic oven, saves space, makes storage or carries more convenient.
Description
Technical field
The utility model is related to protection of circuit, and in particular to the voltage protection circuit of electromagnetic oven.
Background technology
For all of electric equipment, there is a rated voltage, but in practice, it is impossible to it is completely secured in specified electricity
Pressure work, is a scope near rated voltage, is typically required ± 15%.In order to protect electric equipment and technique matter
Amount, is exactly " under-voltage " if being less than -15% this voltage, and when operating voltage drops to below this voltage, protection act is cut
Power-off source.Conversely, being exactly " overvoltage " if above+15% this voltage, also action power dump is protected.Under-voltage and overvoltage is right
Electrical equipment and user all exist very big potential safety hazard, electromagnetic oven as conventional life household electrical appliances, its voltage protection circuit
In the presence of being necessary.In the prior art, the voltage protection circuit of electromagnetic oven is more complicated, takes very big space, causes electromagnetism
The volume of stove is larger, not easy to store or carrying.
Utility model content
Technical problem to be solved in the utility model is that the voltage protection circuit in electromagnetic oven is more complicated, takes more sky
Between, it is therefore intended that the voltage protection circuit of electromagnetic oven is provided, voltage protection circuit is simplified, voltage protection circuit is reduced in electricity
Volume in magnetic stove, saves space, makes storage or carries more convenient.
The utility model is achieved through the following technical solutions：
The voltage protection circuit of electromagnetic oven, including under-voltage protecting circuit and overvoltage crowbar, the under-voltage protecting circuit
Including potentiometer RV3, amplifier U1, diode VD1, resistance R12 and electric capacity C20, electric capacity C20 one end ground connection, its another termination
220V voltages are connected with a fixing end of potentiometer RV3 simultaneously, another fixing end ground connection of potentiometer RV3, potentiometer RV3
Sliding end be connected with the reverse input end of amplifier U1, the positive input of amplifier U1 is connected with output end, amplifier U1
Anode of the positive input also with diode VD1 be connected, one end of resistance R12 is connected with the negative electrode of diode VD1, and its is another
It is signal output part OUT to hold；The overvoltage crowbar includes potentiometer RV2, amplifier U2, diode VD2 and resistance R5, electricity
The one end for hindering R5 is connected on the circuit that electric capacity C20 is connected with potentiometer RV3, a fixation of its other end and potentiometer RV2
End connection, another fixing end ground connection of potentiometer RV2, the sliding end of potentiometer RV2 connects with the positive input of amplifier U2
Connect, the reverse input end ground connection of amplifier U2, the output end of amplifier U2 is connected with the anode of diode VD2, diode VD2's
Negative electrode is connected on the circuit that diode VD1 is connected with resistance R12.Using amplifier and potentiometer and its peripheral component, structure
Into voltage comparator device, under-voltage and over-pressed arbitration functions are realized.
Further, the voltage protection circuit of electromagnetic oven, also including resistance R3, resistance R8, resistance R7 and resistance R11, institute
State resistance R3 one end to be connected with the positive input of amplifier U1, its other end connects resistance R8 and resistance R11, resistance respectively
Other end ground connection of the R11 relative to connection resistance R3, resistance R8 is connected relative to the other end of connection resistance R3 with resistance R7, electricity
Resistance R7 is connected relative to the other end of connection resistance R8 with the reverse input end of amplifier U2.Resistance R3, resistance R8, resistance R7 and
Resistance R11 serves partial pressure effect.
Further, the voltage protection circuit of electromagnetic oven, also including resistance R16, described resistance R16 one end is connected to resistance
The signal output part OUT of R12, its other end ground connection.
The utility model compared with prior art, has the following advantages and advantages：The utility model is using amplification
Device and potentiometer and its peripheral component realize over-pressed and under-voltage circuit protection, and simplify voltage protection circuit, reduce
Volume of the voltage protection circuit in electromagnetic oven, saves space, makes storage or carries more convenient.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structural representation.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, the voltage protection circuit of electromagnetic oven, including under-voltage protecting circuit and overvoltage crowbar, it is described to owe
Voltage protection circuit includes potentiometer RV3, amplifier U1, diode VD1, resistance R12 and electric capacity C20, and electric capacity C20 one end is grounded,
Its another termination 220V voltage is connected with a fixing end of potentiometer RV3 simultaneously, and another of potentiometer RV3 fixes termination
Ground, the sliding end of potentiometer RV3 is connected with the reverse input end of amplifier U1, and positive input and the output end of amplifier U1 connect
Connect, the anode of the positive input of amplifier U1 also with diode VD1 is connected, one end of resistance R12 and the negative electrode of diode VD1
Connection, its other end is signal output part OUT；The overvoltage crowbar includes potentiometer RV2, amplifier U2, diode VD2
With resistance R5, one end of resistance R5 is connected on the circuit that electric capacity C20 is connected with potentiometer RV3, its other end and potentiometer RV2
The connection of a fixing end, another fixing end ground connection of potentiometer RV2, the sliding end of potentiometer RV2 is with amplifier U2 just
Connected to input, the reverse input end ground connection of amplifier U2, the output end of amplifier U2 is connected with the anode of diode VD2,
The negative electrode of diode VD2 is connected on the circuit that diode VD1 is connected with resistance R12.The voltage protection circuit of electromagnetic oven, it is special
Levy and be, also including resistance R16, described resistance R16 one end is connected to the signal output part OUT of resistance R12, its another termination
Ground.The voltage protection circuit of electromagnetic oven, also including resistance R3, resistance R8, resistance R7 and resistance R11, described resistance R3 one end with
The positive input connection of amplifier U1, its other end connects resistance R8 and resistance R11 respectively, and resistance R11 is relative to connection electricity
The other end ground connection of R3 is hindered, resistance R8 is connected relative to the other end of connection resistance R3 with resistance R7, and resistance R7 is relative to connection
The other end of resistance R8 is connected with the reverse input end of amplifier U2.
In the present embodiment, point position RV2, amplifier U2 and peripheral assembly constitute under-voltage protecting circuit, potentiometer RV3, amplification
Device U1 and peripheral assembly composition overvoltage crowbar, resistance R5~resistance R8 relatively provide reference voltage for voltage, resistance R4,
Resistance R5, resistance R6, resistance R12, resistance R14, resistance R16 are divider resistance, and diode VD1 and diode VD2 is coupling two
Pole pipe.When supply voltage is normal, potentiometer RV2 output voltages make the reverse input end current potential of amplifier U2 be more than positive input
Current potential, amplifier U2 output ends output low level, single-chip microcomputer judges normal.When supply voltage is less than 160V, potentiometer RV2 is defeated
Going out voltage makes the reverse input end current potential of amplifier U2 less than positive input current potential, amplifier out output high level, warp
Diode VD2, resistance R12, resistance R16 partial pressures feeding single-chip microcomputer carry out under-voltage judgement control.When voltage is normal, potentiometer RV3
Output voltage makes the positive input current potential of amplifier U1 higher than reverse input end current potential, and amplifier U1 output ends export low electricity
Flat, when supply voltage is higher than 245V, potentiometer RV3 output voltages make the positive input current potential of amplifier U1 less than reversely defeated
Enter terminal potential, amplifier U1 output ends output high level enters through diode VD1, resistance R12, resistance R16 partial pressures feeding single-chip microcomputer
Row overvoltage control judges.
In the present embodiment, the specification of the component for using is as follows：Resistance R4-10K, resistance R5-10K, resistance R6-10K, electricity
Resistance R7-10K, resistance R8-10K, resistance R9-10K, resistance R10-10K, resistance R11-10K, resistance R12-10K, resistance R13-
10K, resistance R14-10K, resistance R15-10K, resistance R15-10K, electric capacity C20-1nF, diode VD1-1N4001, diode
VD2-1N4001, potentiometer RV2-POT-HG, potentiometer RV3-POT-HG, amplifier U1-LM324, amplifier U2-LM324.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equally replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (3)
1. the voltage protection circuit of electromagnetic oven, it is characterised in that described under-voltage including under-voltage protecting circuit and overvoltage crowbar
Protection circuit includes potentiometer RV3, amplifier U1, diode VD1, resistance R12 and electric capacity C20, and electric capacity C20 one end is grounded, its
Another termination 220V voltages are connected with a fixing end of potentiometer RV3 simultaneously, another fixing end ground connection of potentiometer RV3,
The sliding end of potentiometer RV3 is connected with the reverse input end of amplifier U1, and the positive input of amplifier U1 is connected with output end,
Anode of the positive input of amplifier U1 also with diode VD1 is connected, and one end of resistance R12 connects with the negative electrode of diode VD1
Connect, its other end is signal output part OUT；The overvoltage crowbar include potentiometer RV2, amplifier U2, diode VD2 and
One end of resistance R5, resistance R5 are connected on the circuit that electric capacity C20 is connected with potentiometer RV3, and its other end is with potentiometer RV2's
One fixing end connection, another fixing end ground connection of potentiometer RV2, the sliding end of potentiometer RV2 and the forward direction of amplifier U2
Input is connected, and the reverse input end ground connection of amplifier U2, the output end of amplifier U2 is connected with the anode of diode VD2, and two
The negative electrode of pole pipe VD2 is connected on the circuit that diode VD1 is connected with resistance R12.
2. the voltage protection circuit of electromagnetic oven according to claim 1, it is characterised in that also including resistance R3, resistance R8,
Resistance R7 and resistance R11, described resistance R3 one end is connected with the positive input of amplifier U1, and its other end connects resistance respectively
The other end ground connection of R8 and resistance R11, resistance R11 relative to connection resistance R3, resistance R8 is another relative to connection resistance R3's
End is connected with resistance R7, and resistance R7 is connected relative to the other end of connection resistance R8 with the reverse input end of amplifier U2.
3. the voltage protection circuit of electromagnetic oven according to claim 1, it is characterised in that also including resistance R16, the electricity
Resistance R16 one end is connected to the signal output part OUT of resistance R12, its other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621325295.0U CN206211504U (en) | 2016-12-05 | 2016-12-05 | The voltage protection circuit of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621325295.0U CN206211504U (en) | 2016-12-05 | 2016-12-05 | The voltage protection circuit of electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211504U true CN206211504U (en) | 2017-05-31 |
Family
ID=58754422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621325295.0U Expired - Fee Related CN206211504U (en) | 2016-12-05 | 2016-12-05 | The voltage protection circuit of electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211504U (en) |
-
2016
- 2016-12-05 CN CN201621325295.0U patent/CN206211504U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204965104U (en) | Air conditioner and last electricity and current foldback circuit of intelligence power module thereof | |
| CN104218539A (en) | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply | |
| CN205212423U (en) | Protection circuit of electric motor car intelligent charging ware | |
| CN202050235U (en) | Battery reverse-connection protection circuit and lamp | |
| CN105978064B (en) | A kind of self-locking battery, which is crossed, puts overcharge protection circuit and lamps and lanterns | |
| CN203963189U (en) | Be applied to the self locking type control circuit that valve is controlled | |
| CN206211504U (en) | The voltage protection circuit of electromagnetic oven | |
| CN103023116B (en) | Mobile communication terminal and circuit used for protecting charging of mobile communication terminal | |
| CN106786397A (en) | Voltage protection circuit based on circuit rectifies bridge | |
| CN103199503B (en) | Protective circuit of vehicle-mounted charger | |
| CN206401879U (en) | Input undervoltage protection circuit for DC DC | |
| CN217063266U (en) | Current backflow prevention circuit applied to battery detection equipment | |
| CN106786352A (en) | A kind of protective circuit for electric appliance of over-and under-voltage | |
| CN101697410A (en) | Short-circuit protection circuit adopted in battery charger circuit | |
| CN204595635U (en) | Temperature-control circuit in DC converter used for electric vehicle | |
| CN205070527U (en) | Battery fill discharging protecting circuit and battery | |
| CN209417237U (en) | DC relay closed state detection device | |
| CN205882771U (en) | Control circuit of compatible battery charge protection , Channel switching and linear power supply management | |
| CN203708096U (en) | Power supply protection circuit and power supply | |
| CN208986672U (en) | A kind of power supply automatic switchover circuit of charged pool undervoltage turnoff | |
| CN208290986U (en) | BMS multifunctional unit electric power management circuit | |
| CN102611154B (en) | Charging circuit with function of inhibiting transient voltage and mobile phone with charging circuit | |
| CN205829166U (en) | A kind of one-way conduction power control circuit | |
| CN206099756U (en) | Inside low -cost singlechip supply circuit of BMS | |
| CN204046163U (en) | Multi-purposed charger output polarity reverse-connection protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20171205 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |