CN209517541U - A kind of overvoltage crowbar for high-frequency induction heating power - Google Patents
A kind of overvoltage crowbar for high-frequency induction heating power Download PDFInfo
- Publication number
- CN209517541U CN209517541U CN201822151839.1U CN201822151839U CN209517541U CN 209517541 U CN209517541 U CN 209517541U CN 201822151839 U CN201822151839 U CN 201822151839U CN 209517541 U CN209517541 U CN 209517541U
- Authority
- CN
- China
- Prior art keywords
- output end
- module
- induction heating
- detection
- heating power
- 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 a kind of overvoltage crowbars for high-frequency induction heating power, it is related to protection of field of circuit technology, the utility model includes protective module, detection module and alarm module, the detection module includes detection transistor Q, alarm module includes Light-emitting diode LED 2, protective module input terminal is connect with auxiliary power output end, the auxiliary power output end is connected with input voltage, the base stage of protective module output end connecting detection triode Q, the emitter of detection transistor Q is grounded, collector is connected with alarm module and system master switch respectively, the utility model passes through zener diode D, detection transistor Q and Light-emitting diode LED 2 realize the over-voltage detection and protection of induction heating power input voltage, circuit structure is simple, it is easily achieved.
Description
Technical field
The utility model relates to protect field of circuit technology, high-frequency induction heating power is used for more particularly to one kind
Overvoltage crowbar.
Background technique
Electric energy is become magnetic energy first with Ampere's law by induction heating power, then passes through Faraday's electromagnetic induction law
Magnetic energy is converted into electric energy, then converts electrical energy into a kind of inverter of thermal energy again according to Joule's law.Induction heating skill
The working principle of art is that the magnetic force line cutting in high frequency alternating electromagnetic field is placed on the workpiece inside magnetic field, in workpiece perpendicular to magnetic
On the section of the line of force, vortex is generated according to the law of electromagnetic induction, by Joule's law it is found that vortex of inducting is intrinsic in conductive materials
AC impedance on generate thermal energy, to be heated to workpiece.
In recent years, the progress of power electronic element, circuit topological structure and control technology leads induction heating electric always
The progress of source technology, with new process, the appearance of new technology and its application constantly extension, induction heating power is towards large capacity
Change, high frequency, the intelligent direction with digitlization and greenization are developed.
Input voltage is excessive and cause induction heating power damage of internal device in order to prevent, and existing high-frequency induction adds
Thermoelectric generator is using driver " soft switching " Lai Shixian, although " soft switching " by driver can be avoided derailing switch mostly
For part in short circuit by the damage of overvoltage, still, driver is in the process of running, it is possible to will receive other component
Interference and cause " soft switching " function that can not be that zero moment turn off just in electric current, when leading to overvoltage in induction heating power
Portion's component damage, reliability be not high.
Utility model content
The purpose of this utility model is that: it is real using " soft switching " of driver in order to solve existing induction heating power
Now to the protection of internal component, the not high problem of reliability, the utility model provides a kind of for high-frequency induction heating power
Overvoltage crowbar.
The utility model specifically uses following technical scheme to achieve the goals above:
A kind of overvoltage crowbar for high-frequency induction heating power, including protective module, detection module and alarm mould
Block, the detection module include detection transistor Q, and alarm module includes Light-emitting diode LED 2, protective module input terminal with it is auxiliary
Power output end is helped to connect, the auxiliary power output end is connected with input voltage, three pole of protective module output end connecting detection
The base stage of pipe Q, the emitter ground connection of detection transistor Q, collector are connected with alarm module and system master switch respectively.
Further, the protective module includes one end and the auxiliary electricity of zener diode D and resistance R2, the resistance R2
Source output terminal connection, the other end are connect with the cathode of zener diode D, the anode connecting detection triode Q's of zener diode D
Base stage.
Further, the alarm module further includes d type flip flop and resistance R5, detect the collector of diode Q respectively with D
Trigger is connected with system main switch, and the output end of d type flip flop connects resistance R5, the other end and light emitting diode of resistance R5
The cathode of LED2 connects, and the anode of Light-emitting diode LED 2 connects+5V supply voltage.
Further, the protective module is also connected with work indicating module, and the work indicating module includes resistance R1
With Light-emitting diode LED 1, the one end resistance R1 connects auxiliary power output end, the anode company of the other end and Light-emitting diode LED 1
It connects, the cathode of Light-emitting diode LED 1 is connect with the emitter of detection transistor Q.
Further, electrolytic capacitor C1 is connected between the auxiliary power output end and the emitter of detection transistor Q,
The both ends of electrolytic capacitor C1 are parallel with capacitor C2, absorb to hf interference current signal.
Further, the auxiliary power output end operating voltage is 15V.
The working principle of the utility model are as follows:
Under normal operation, auxiliary power output end exports 15V voltage, the not up to breakdown voltage of zener diode D,
The base stage low level of detection transistor Q is in an off state, and collector voltage is high level, switchs connect with system master at this time
Output port Out be high level, Light-emitting diode LED 2 is not turned on, alarm free；
When input voltage is excessively high, accessory power supply output voltage becomes larger therewith, and zener diode D is breakdown, detects three poles
The base stage of pipe Q becomes high level on state, and the collector voltage of detection transistor Q becomes low level, output port Out at this time
Become low level, system master switch OFF, while the anode voltage of Light-emitting diode LED 2 greater than cathode voltage, light-emitting diodes
Pipe LED2 conducting, luminous alarm.
The beneficial effects of the utility model are as follows:
1, the utility model realizes induction heating by zener diode D, detection transistor Q and Light-emitting diode LED 2
The over-voltage of power input voltage detects and protection, circuit structure are simple, it is easy to accomplish, and indicated by Light-emitting diode LED 1
The working condition of overvoltage crowbar, it is convenient intuitive.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
In order to which those skilled in the art better understand the utility model, with reference to the accompanying drawing with following embodiment to this
Utility model is described in further detail.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of overvoltage crowbar for high-frequency induction heating power, including protection
Module, detection module and alarm module, the detection module include detection transistor Q, and alarm module includes light emitting diode
LED2, protective module input terminal are connect with auxiliary power output end, and the auxiliary power output end is connected with input voltage, auxiliary
Power output end operating voltage is 15V, the base stage of protective module output end connecting detection triode Q, the hair of detection transistor Q
Emitter grounding, collector are connected with alarm module and system master switch respectively, the auxiliary power output end and detection three
Electrolytic capacitor C1 is connected between the emitter of pole pipe Q, the both ends of electrolytic capacitor C1 are parallel with capacitor C2；
The protective module includes zener diode D and resistance R2, one end of the resistance R2 and auxiliary power output end
Connection, the other end are connect with the cathode of zener diode D, the base stage of the anode connecting detection triode Q of zener diode D；
The alarm module further includes d type flip flop and resistance R5, detect the collector of diode Q respectively with d type flip flop and
The connection of system main switch, the output end of d type flip flop connect resistance R5, the other end of resistance R5 and the cathode of Light-emitting diode LED 2
Connection, the anode of Light-emitting diode LED 2 connect+5V supply voltage, and the both ends of Light-emitting diode LED 2 are parallel with resistance R4, detection
The collector of triode Q is connect by resistance R3 with+5V supply voltage；
The protective module is also connected with work indicating module, and the work indicating module includes resistance R1 and light-emitting diodes
Pipe LED1, the one end resistance R1 connect auxiliary power output end, and the other end is connect with the anode of Light-emitting diode LED 1, light-emitting diodes
The cathode of pipe LED1 is connect with the emitter of detection transistor Q, when the work of the overvoltage crowbar of the utility model, luminous two
The anode voltage of pole pipe LED1 is higher than cathode voltage, and Light-emitting diode LED 1 is connected, and the indicating circuit that shines is in running order.
The working principle of the present embodiment are as follows:
Under normal operation, auxiliary power output end exports 15V voltage, the not up to breakdown voltage of zener diode D,
The base stage low level of detection transistor Q is in an off state, and collector voltage is high level, switchs connect with system master at this time
Output port Out be high level, Light-emitting diode LED 2 is not turned on, alarm free；
When input voltage is excessively high, accessory power supply output voltage becomes larger therewith, and zener diode D is breakdown, detects three poles
The base stage of pipe Q becomes high level on state, and the collector voltage of detection transistor Q becomes low level, output port Out at this time
Become low level, system master switch OFF, while the anode voltage of Light-emitting diode LED 2 greater than cathode voltage, light-emitting diodes
Pipe LED2 conducting, luminous alarm.
The above, the only preferred embodiment of the utility model, are not intended to limit the utility model, the utility model
Scope of patent protection be subject to claims, it is equivalent made by all specifications and accompanying drawing content with the utility model
Structure change similarly should be included in the protection scope of the utility model.
Claims (6)
1. a kind of overvoltage crowbar for high-frequency induction heating power, it is characterised in that: including protective module, detection module
And alarm module, the detection module include detection transistor Q, alarm module includes Light-emitting diode LED 2, and protective module is defeated
Enter end to connect with auxiliary power output end, the auxiliary power output end is connected with input voltage, the connection of protective module output end
The base stage of detection transistor Q, the emitter ground connection of detection transistor Q, collector are opened with alarm module and system master respectively
Connection connects.
2. a kind of overvoltage crowbar for high-frequency induction heating power according to claim 1, it is characterised in that: institute
Stating protective module includes zener diode D and resistance R2, and one end of the resistance R2 is connect with auxiliary power output end, the other end
It is connect with the cathode of zener diode D, the base stage of the anode connecting detection triode Q of zener diode D.
3. a kind of overvoltage crowbar for high-frequency induction heating power according to claim 1, it is characterised in that: institute
Stating alarm module further includes d type flip flop and resistance R5, detect the collector of diode Q respectively with d type flip flop and system main switch
The output end of connection, d type flip flop connects resistance R5, and the other end of resistance R5 is connect with the cathode of Light-emitting diode LED 2, shines
The anode of diode (LED) 2 connects+5V supply voltage.
4. a kind of overvoltage crowbar for high-frequency induction heating power according to claim 1, it is characterised in that: institute
It states protective module and is also connected with work indicating module, the work indicating module includes resistance R1 and Light-emitting diode LED 1, electricity
It hinders the one end R1 and connects auxiliary power output end, the other end is connect with the anode of Light-emitting diode LED 1, Light-emitting diode LED 1
Cathode is connect with the emitter of detection transistor Q.
5. a kind of overvoltage crowbar for high-frequency induction heating power according to claim 1-4, special
Sign is: electrolytic capacitor C1, electrolytic capacitor C1 are connected between the auxiliary power output end and the emitter of detection transistor Q
Both ends be parallel with capacitor C2.
6. a kind of overvoltage crowbar for high-frequency induction heating power according to claim 1-4, special
Sign is: the auxiliary power output end operating voltage is 15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151839.1U CN209517541U (en) | 2018-12-21 | 2018-12-21 | A kind of overvoltage crowbar for high-frequency induction heating power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822151839.1U CN209517541U (en) | 2018-12-21 | 2018-12-21 | A kind of overvoltage crowbar for high-frequency induction heating power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209517541U true CN209517541U (en) | 2019-10-18 |
Family
ID=68196087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822151839.1U Expired - Fee Related CN209517541U (en) | 2018-12-21 | 2018-12-21 | A kind of overvoltage crowbar for high-frequency induction heating power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209517541U (en) |
-
2018
- 2018-12-21 CN CN201822151839.1U patent/CN209517541U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101882879B (en) | Circuit converting constant current source to constant voltage source and light using same | |
| CN206321697U (en) | Overvoltage detection circuit and switching power supply circuit | |
| CN104218558B (en) | Anti-surging high tension protection circuit | |
| CN104698262A (en) | Zero cross detection circuit and variable frequency air conditioner | |
| CN115656873A (en) | PE grounding real-time detection circuit for alternating-current charging gun | |
| CN105680418B (en) | A kind of load motor protection circuit, fan and air-conditioning | |
| CN209517541U (en) | A kind of overvoltage crowbar for high-frequency induction heating power | |
| CN206313431U (en) | Electronic equipment and its overvoltage crowbar | |
| CN104600690A (en) | LED lamp and input polarity automatic converting circuit thereof | |
| CN106535418A (en) | LED drive chip and drive circuit | |
| CN203387165U (en) | High-speed half-bridge MOSFET short circuit protection circuit | |
| CN104466897B (en) | A kind of overvoltage crowbar and lamps and lanterns | |
| CN202330540U (en) | Zero-cross detection circuit | |
| CN201478999U (en) | IGBT driving circuit of frequency converter with middle and higher voltage | |
| CN212305734U (en) | Lamp tube driving circuit, lamp tube driving device and lamp tube | |
| CN110786079B (en) | Lamp tube, protection circuit and protection device applied to lamp tube | |
| CN206498183U (en) | A kind of over-and under-voltage protection circuit | |
| CN203287429U (en) | Microwave detection circuit used for magnetrons | |
| CN204967434U (en) | Mains operated circuit and system of surge current peak value measuring circuit | |
| CN206250970U (en) | A kind of switching power circuit based on circuit frequency jitter technique | |
| CN104393563A (en) | Mains supply monitoring system | |
| CN205017204U (en) | Zero power consumption release circuit for anti -interference capacitors on switching power supply AC end | |
| CN106937436B (en) | A kind of LED power with protection circuit | |
| CN209896680U (en) | Circuit for realizing self-checking of leakage protector | |
| CN205265967U (en) | Touch lighting circuit of double key |
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: 20191018 Termination date: 20211221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |