CN205490188U - Take intelligent temperature control's power adapter - Google Patents
Take intelligent temperature control's power adapter Download PDFInfo
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- CN205490188U CN205490188U CN201620037919.2U CN201620037919U CN205490188U CN 205490188 U CN205490188 U CN 205490188U CN 201620037919 U CN201620037919 U CN 201620037919U CN 205490188 U CN205490188 U CN 205490188U
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Abstract
The utility model discloses a take intelligent temperature control's power adapter, it includes: hard protection circuit, rectifier module, voltage transformation module, afterflow rectifier module, voltage feedback module, PWM control module, be connected soft protection circuit between PWM control module and the voltage transformation module, the transformer installation in soft protection circuit and the voltage transformation module together to feed back to PWM control module with the transformer temperature value, soft protection is stopped power supply when power adapter bulk temperature exceedes the excess temperature protection value of setting for, automatic recovery power supply when the temperature is less than excess temperature protection value, became invalid like soft protection, the power adapter temperature further risees, protects open circuit firmly, needs the professional to resume to supply power to the load again, potential safety hazards such as high temperature that the double protection of above soft or hard effectively prevented to arouse because of the power adapter continued work temperature rise is too high is dangerous and catch fire to protection user's the person and property safety realize the high reliability requirement of power.
Description
Technical field
This utility model relates to power supply adaptor, particularly relates to a kind of energy automatic detection for temperature and implements the power supply adaptor that temperature controls to protect.
Background technology
Along with developing rapidly of electronics technology, power electronic equipment is the closest with the relation of the work of people, life, and all electronic equipments all be unable to do without highly reliable power supply, therefore the Switching Power Supply exporting constant pressure and flow starts to play the most important effect, subsequently entering various electronics, electric equipment field, the electronic equipment power source such as information technology class, audio frequency and video class and household electrical appliances toys has been widely used direct-current switch power supply the most.Simultaneously along with many new and high technologies, the development of technology such as including high-frequency switching technology, soft switch technique, power factor correction technology, synchronous rectification, intellectualized technology, surface mounting technique, switch power technology is innovated constantly, and this provides development space widely for direct-current switch power supply.But owing in Switching Power Supply, control circuit is more complicated, the ability of transistor and integrated device and power conversion device tolerance electricity, thermal shock is poor, there is High Temperature and the potential safety hazard such as catch fire can cause user's personal safety and property loss.Need the most in the industry exploitation a kind of energy automatic detection for temperature badly and implement the power supply adaptor that temperature controls to protect.
Utility model content
This utility model is intended to solve the problem of prior art Thermal protection scarce capacity, proposes a kind of energy automatic detection for temperature and implements the power supply adaptor that temperature controls to protect.
For solving above-mentioned technical problem, the technical scheme that the utility model proposes is to design the power supply adaptor that a kind of band intelligent temperature controls, comprising: hard protection circuit, rectification filtering module, voltage transformation module, afterflow rectification filtering module, voltage feedback module, PWM control module, external AC power supply is by exporting to rectification filtering module after hard protection circuit, convert alternating current is to flow to voltage transformation module after unidirectional current by rectification filtering module, voltage transformation module flows to afterflow rectification filtering module by after DC power conversion amplitude, after afterflow rectification filtering module rectifying and wave-filtering, load is given in output；Described hard protection circuit uses Thermal Cutoffs, and this Thermal Cutoffs is serially connected in the ac power supply circuit of rectification filtering module；Described voltage feedback module gathers the output voltage of afterflow rectification filtering module and feeds back to PWM control module, and PWM control module controls voltage transformation module and carries out voltage transformation；Being connected soft protection circuit between described PWM control module and voltage transformation module, soft protection circuit is installed together with the transformator in voltage transformation module, and transformer temperature value is fed back to PWM control module.
After described soft protection circuit includes critesistor, critesistor and the 4th resistor coupled in parallel, one end connects the Temperature Feedback pin of PWM control module, the other end and connects place of working by the 6th resistance；Be of coupled connections one end of described primary winding, the other end of primary winding of the cathode output end of described rectification filtering module connects place of working by the electrical switch coupling in voltage transformation module, and the cathode output end of rectification filtering module connects place of working.
Described critesistor uses negative tempperature coefficient thermistor.
Described critesistor gluing connects on the transformer with black.
Described electrical switch uses field effect transistor；The foot that controls of PWM control module connects negative electrode and one end of the 12nd resistance of the 3rd diode, the anode of the 3rd diode connects the grid of electrical switch by the 11st resistance, and the grid of electrical switch is connected the other end of the 12nd resistance and connect the source electrode of electrical switch by the 13rd resistance.
Described Thermal Cutoffs is embedded between the winding of described transformator.
Compared with prior art; this utility model uses soft protection and hard protection circuit; soft protection stops when power supply adaptor body temperature exceedes the overheat protector value of setting powering to the load, and automatically recovers to power to the load when power supply adaptor temperature is less than overheat protector value；Such as soft shielding failure, power supply adaptor temperature raises further, firmly protects disconnecting circuit, needs professional to recover again to power to the load；The double protection of above soft or hard effectively prevents because of the too high High Temperature caused of power supply adaptor continuous firing temperature rise and the potential safety hazard such as catch fire, thus protects the person and the property safety of user, it is achieved the high reliability request of power supply.
Accompanying drawing explanation
Fig. 1 is the theory diagram of this utility model preferred embodiment；
Fig. 2 is the hard protection circuit figure of this utility model preferred embodiment；
Fig. 3 is the soft protection circuit figure of this utility model preferred embodiment；
Fig. 4 is the integrated circuit of this utility model preferred embodiment.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is described in further detail.Should be appreciated that specific embodiment described herein is used only for explaining this utility model, be not used to limit this utility model.
This utility model discloses the power supply adaptor that a kind of band intelligent temperature controls; referring to the theory diagram shown in Fig. 1, specifically include that hard protection circuit, rectification filtering module, voltage transformation module, afterflow rectification filtering module, voltage feedback module, PWM control module.External AC power supply (can use civil power) exports to rectification filtering module after being carried out temperature protection by hard protection circuit, carried out lightning protection by lightning protection module; convert alternating current is to carry out EMI filtering by EMI filtration module after unidirectional current by rectification filtering module; flow to voltage transformation module afterwards; voltage transformation module flows to afterflow rectification filtering module by after DC power conversion amplitude, and after afterflow rectification filtering module rectifying and wave-filtering, load is given in output.Referring to Fig. 2 and Fig. 4, hard protection circuit uses Thermal Cutoffs FT1, and this Thermal Cutoffs is serially connected in the ac power supply circuit of rectification filtering module；Described voltage feedback module gathers the output voltage of afterflow rectification filtering module and feeds back to PWM control module, and PWM control module controls voltage transformation module and carries out voltage transformation；In the preferred embodiment, described critesistor NTC2 uses negative tempperature coefficient thermistor.If soft shielding failure, power supply adaptor temperature raises further, firmly protects disconnecting circuit, and needing professional to change Thermal Cutoffs could power to the load again.Being connected soft protection circuit between described PWM control module and voltage transformation module, soft protection circuit is installed together with the transformator in voltage transformation module, and transformer temperature value is fed back to PWM control module.Soft protection PWM control module when power supply adaptor body temperature exceedes the overheat protector value of setting controls voltage transformation module from service, i.e. stops powering to the load, automatically recovers to power to the load when power supply adaptor temperature is less than overheat protector value.
Described voltage transformation module and PWM control module can use the circuit structure of routine.Referring to the integrated circuit shown in Fig. 4, voltage transformation module mainly includes transformator T1, electrical switch Q1 with T1 primary windings connected in series, PWM control module mainly includes finished product PWM chip (U1) and the PWM chip peripheral circuit can bought on the market, PWM chip connects electrical switch Q1, and control switching frequency and the pulsewidth of electrical switch Q1, when soft protection circuit fed power supplies adapter temperature is too high, PWM chip controls switch Q1 and turns off, voltage transformation module from service, power supply adaptor stops powering to the load, automatically recover to power to the load when power supply adaptor temperature is less than overheat protector value, thereby reach to protect the function of power supply adaptor.
From Fig. 4 it can also be seen that, power supply adaptor has voltage feedback module, voltage feedback module is connected to the outfan of afterflow rectification filtering module, and in order to fed-back output voltage and load, PWM chip can adjust switching frequency and the pulsewidth of electrical switch Q1 according to output voltage and load.
Referring to the preferred embodiment shown in Fig. 3 and Fig. 4, after described soft protection circuit includes critesistor NTC2, critesistor and the 4th resistance R4 parallel connection, one end connects the Temperature Feedback pin of PWM control module, the other end and connects place of working by the 6th resistance R6；Be of coupled connections one end of described primary winding, the other end of primary winding of the cathode output end of described rectification filtering module connects place of working by the electrical switch Q1 coupling in voltage transformation module, and the cathode output end of rectification filtering module connects place of working.Described critesistor NTC2 gluing connects on the transformer with black.When the temperature of transformator T1 raises, critesistor NTC2 temperature sensor raises, resistance reduces, and now the series-parallel network equivalent resistance of critesistor NTC2 Yu R6 and R4 composition reduces, and the resistance of the RT pin of PWM chip U1 to place of working reduces, when voltage on RT pin is less than U1 internal reference voltage, U1 builtin voltage comparator action, makes the voltage on the GATA pin of U1 reduce, and then makes electrical switch Q1 turn off, voltage transformation module from service, power supply adaptor stops powering to the load.After power supply adaptor is stopped power supply, transformator T1 declines because of the temperature that quits work, critesistor NTC2 temperature sensor declines, resistance raises, now the series-parallel network equivalent resistance of critesistor NTC2 Yu R6 and R4 composition raises, the RT pin of U1 increases to the resistance in place of working, voltage synchronous on RT pin raises, when this voltage is more than U1 internal reference voltage, Master control chip U1 builtin voltage comparator moves, voltage on the GATA pin of U1 raises, and then makes electrical switch Q1 ON operation, and power supply adaptor powers to the load again.Thereby realize the function automatically recovered after excess temperature is automatically protected and lowered the temperature.
Referring to the integrated circuit figure shown in Fig. 4, described electrical switch Q1 uses field effect transistor；The negative electrode controlling foot connection the 3rd diode D3 of PWM control module and one end of the 12nd resistance R12, the anode of the 3rd diode connects the grid of electrical switch by the 11st resistance R11, and the grid of electrical switch is connected the other end of the 12nd resistance and connect the source electrode of electrical switch by the 13rd resistance R13.When PWM chip U1 turns off electrical switch Q1 at overheat protector, the grid of Q1 has higher voltage, and gate high-voltage can be discharged into source electrode by the 3rd diode D3, thus protects Q1, extends its service life.
Described Thermal Cutoffs FT1 is embedded between the winding of described transformator T1, it is simple to directly detecting the temperature of Transformer Winding, response speed is protected reliably soon.
Above example by way of example only, non-provides constraints.Any without departing from the application spirit and scope, and the equivalent modifications that it is carried out or change, it is intended to be limited solely by among claims hereof scope.
Claims (6)
1. the power supply adaptor that a band intelligent temperature controls; it is characterized in that including: hard protection circuit, rectification filtering module, voltage transformation module, afterflow rectification filtering module, voltage feedback module, PWM control module; external AC power supply is by exporting to rectification filtering module after hard protection circuit; convert alternating current is to flow to voltage transformation module after unidirectional current by rectification filtering module, voltage transformation module will flow to after DC power conversion amplitude afterflow rectification filtering module, after afterflow rectification filtering module rectifying and wave-filtering output to load；
Described hard protection circuit uses Thermal Cutoffs (FT1), and this Thermal Cutoffs is serially connected in the ac power supply circuit of rectification filtering module；
Described voltage feedback module gathers the output voltage of afterflow rectification filtering module and feeds back to PWM control module, and PWM control module controls voltage transformation module and carries out voltage transformation；
Being connected soft protection circuit between described PWM control module and voltage transformation module, soft protection circuit is installed together with the transformator in voltage transformation module, and transformer temperature value is fed back to PWM control module.
2. the power supply adaptor that band intelligent temperature as claimed in claim 1 controls; it is characterized in that: after described soft protection circuit includes critesistor (NTC2), critesistor and the 4th resistance (R4) parallel connection, one end connects the Temperature Feedback pin of PWM control module, the other end and connects place of working by the 6th resistance (R6)；Be of coupled connections one end of described primary winding, the other end of primary winding of the cathode output end of described rectification filtering module connects place of working by electrical switch (Q1) coupling in voltage transformation module, and the cathode output end of rectification filtering module connects place of working.
3. the power supply adaptor that band intelligent temperature as claimed in claim 2 controls, it is characterised in that: described critesistor (NTC2) uses negative tempperature coefficient thermistor.
4. the power supply adaptor that band intelligent temperature as claimed in claim 3 controls, it is characterised in that: described critesistor (NTC2) gluing connects on the transformer with black.
5. the power supply adaptor that band intelligent temperature as claimed in claim 4 controls, it is characterised in that: described electrical switch (Q1) uses field effect transistor；The control foot of PWM control module connects negative electrode and one end of the 12nd resistance (R12) of the 3rd diode (D3), the anode of the 3rd diode connects the grid of electrical switch by the 11st resistance (R11), and the grid of electrical switch is connected the other end of the 12nd resistance and connect the source electrode of electrical switch by the 13rd resistance (R13).
6. the power supply adaptor that band intelligent temperature as claimed in claim 5 controls, it is characterised in that: described Thermal Cutoffs (FT1) is embedded between the winding of described transformator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037919.2U CN205490188U (en) | 2016-01-15 | 2016-01-15 | Take intelligent temperature control's power adapter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037919.2U CN205490188U (en) | 2016-01-15 | 2016-01-15 | Take intelligent temperature control's power adapter |
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| CN205490188U true CN205490188U (en) | 2016-08-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887826A (en) * | 2017-03-23 | 2017-06-23 | 深圳市福瑞康电子有限公司 | A kind of power supply adaptor with excess temperature and input overvoltage double protection function |
| CN106936324A (en) * | 2016-12-29 | 2017-07-07 | 施耐德万高（天津）电气设备有限公司 | A kind of automatic transfer switching electric appliance controller power source special |
| CN108418182A (en) * | 2017-02-10 | 2018-08-17 | 株式会社牧田 | Power supply adaptor |
| CN109802363A (en) * | 2019-01-09 | 2019-05-24 | 无锡市晶源微电子有限公司 | Circuit of synchronous rectification and guard method, synchronous rectification protective device and charger |
-
2016
- 2016-01-15 CN CN201620037919.2U patent/CN205490188U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936324A (en) * | 2016-12-29 | 2017-07-07 | 施耐德万高（天津）电气设备有限公司 | A kind of automatic transfer switching electric appliance controller power source special |
| CN108418182A (en) * | 2017-02-10 | 2018-08-17 | 株式会社牧田 | Power supply adaptor |
| CN108418182B (en) * | 2017-02-10 | 2021-10-22 | 株式会社牧田 | Power adapter |
| CN106887826A (en) * | 2017-03-23 | 2017-06-23 | 深圳市福瑞康电子有限公司 | A kind of power supply adaptor with excess temperature and input overvoltage double protection function |
| CN109802363A (en) * | 2019-01-09 | 2019-05-24 | 无锡市晶源微电子有限公司 | Circuit of synchronous rectification and guard method, synchronous rectification protective device and charger |
| CN109802363B (en) * | 2019-01-09 | 2024-06-18 | 无锡市晶源微电子股份有限公司 | Synchronous rectification circuit, synchronous rectification protection method, synchronous rectification protection device and charger |
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Address after: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN FRECOM ELECTRONICS CO., LTD. Address before: 518000 Shenzhen Guangming New District, Guangdong Province, Fuchuan rich science and Technology Park Patentee before: SHENZHEN FRECOM ELECTRONICS CO., LTD. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220223 Address after: 423000 No. 18, Jintian Road, bailutang Town, Suxian District, Chenzhou City, Hunan Province Patentee after: Hunan furuikang Electronics Co.,Ltd. Address before: 518000 New Lake Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN FRECOM ELECTRONICS Co.,Ltd. |