CN206023190U - The AC/DC power modules of overheat warning - Google Patents
The AC/DC power modules of overheat warning Download PDFInfo
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- CN206023190U CN206023190U CN201620537021.1U CN201620537021U CN206023190U CN 206023190 U CN206023190 U CN 206023190U CN 201620537021 U CN201620537021 U CN 201620537021U CN 206023190 U CN206023190 U CN 206023190U
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- overheat warning
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Abstract
A kind of AC/DC power modules of overheat warning, also include sampling unit including transistor, for detecting the temperature of transistor, export sampled voltage；Comparing unit, is coupled to sampling unit, for comparing according to a reference voltage and sampled voltage, the output alarm signal when sampled voltage is more than reference voltage；Alarm unit, it is coupled to comparing unit, remind user of service that the AC/DC power modules are using abnormal in response to alarm signal, in AC/DC power modules, the integration density of electron plate is high, and transistor heat-resisting ability is poor, so the temperature of transistor is higher to make transistor damage, cause larger economic loss, so arrange a sampling unit sampling to the temperature of transistor, and temperature signal is converted to voltage signal output and sampled voltage, represent that temperature is too high when sampled voltage is more than reference voltage, now, output alarm signal, the alarm unit for receiving alarm signal reminds user of service to need to take measures to prevent transistor scaling loss, to produce economic loss.
Description
Technical field
This utility model is related to modular power source field, more particularly to the AC/DC power modules of overheat warning.
Background technology
Power module is the power supply unit that directly can be mounted on printed circuit board (PCB), is characterized in being special integrated
Circuit（ASIC）, digital signal processor (DSP), microprocessor, memorizer, field programmable gate array (FPGA) and its
He provides power supply by digital or fictitious load.In general, this generic module is referred to as loading point (POL) power system or use
Point source supply system (PUPS).Due to the advantage of modular organization a lot of, therefore modular power source be widely used in switching equipment,
The communications field such as access device, mobile communication, microwave communication and optical transport, router and automotive electronics, Aero-Space etc..
For convenience, the people that present people replace Switching Power Supply with power module is more and more, and high temperature is high to power density
Power module reliability effect greatly, high temperature can cause the service life reduction of electrochemical capacitor, and the insulation of transformator enamel-covered wire is special
Property reduce, transistor damage, material aging, solder joint such as come off at the phenomenon, have statistics to show, electronic component temperature does not raise 2
DEG C, reliability just declines 10%, and for the thermal design of power module, it includes two aspects：Reduce loss and improve heat sink strip
Part.One. the loss loss of components and parts is the immediate cause for producing heat, and reduce loss is the basic of reduction heating.On the market
Some producers are heater element bag in inside modules so that heat dissipates does not go out, and this method is deceived oneself as well as others a little.Reduce internal
The loss and temperature rise of heater element is only absolute principle.The Primary Component of power module thermal design typically has：Metal-oxide-semiconductor, diode, change
Depressor, power inductance, current-limiting resistance etc..Its loss is as follows：The loss of 1.MOS pipes：Conduction loss, switching loss（Turn-on consumption
And turn-off power loss）；2. the loss of commutation diode：Forward conduction is lost；3. transformator, power inductance：Iron loss and copper loss；
4. passive device（Resistance, electric capacity etc.）：Ohm thermal losses.Two. thermal design design initial stage, Scheme Choice, components and parts select,
The aspects such as PCB design should all consider thermal design.
One Chinese patent of Publication No. CN101662221A is disclosed in a kind of " high-efficiency linear power supply module ", it
Propose the secondary voltage that high voltage isolating switch power transformator is directly connected to by the input of the power adjustment pipe of linear power supply,
Sampled voltage is taken out in the input and output side of power adjustment pipe, the input in the same direction and reverse of integrated computation prosperity device is sent to respectively
End do subtraction, by the difference voltage at computing and set pressure reduction relatively after, open with its error voltage and to high_voltage isolation
The output voltage in powered-down source is controlled, in the output voltage and output power range of all different sections, and supply voltage
Change, the pressure reduction at power adjustment pipe output input two ends can be accurately controlled in the linear zone of its critical saturation all the time, and its power disappears
Consumption be restricted to minimum so that the efficiency of linear power supply is lifted to greatest extent；But, so arrange to power MOS pipe,
The housing radiating effect requirement of the heat resistance and power module of transformator and multiple components and parts is higher, will otherwise cause
Situations such as transistor scaling loss and aging circuit reduce service life occurs.
Utility model content
The purpose of this utility model is the AC/DC power modules for providing a kind of overheat warning, with raising AC/DC power supplys
The effect of module service life.
Above-mentioned purpose of the present utility model technical scheme is that：
A kind of AC/DC power modules of overheat warning, including transistor, also include
Sampling unit, for detecting the temperature of transistor, and exports sampled voltage；
Comparing unit, is coupled to sampling unit, for comparing according to a reference voltage and sampled voltage, when sampled voltage big
Output alarm signal when reference voltage；
Alarm unit, is coupled to the comparing unit, reminds user of service's AC/DC power modules in response to alarm signal
Using exception.
By adopting above-mentioned technical proposal, in AC/DC power modules, the integration density of electron plate is high, and transistor is resistance to
High temperature capabilities are poor, so the temperature of transistor is higher to make transistor damage, so arranging a sampling unit to transistor
Temperature is sampled, and temperature signal is converted to voltage signal output and sampled voltage, and comparing unit is coupled to sampling unit,
For being compared according to a reference voltage and sampled voltage, represent that temperature is too high when sampled voltage is more than reference voltage, this
When, output alarm signal, alarm unit in response to alarm signal to remind the transistor exception of user of service's AC/DC modules,
Needs take measures to prevent transistor scaling loss, to produce economic loss.
Used as improvement of the present utility model, the sampling unit includes the sampling resistor being arranged in series and thermo-sensitive resistor, institute
State the node output sampled voltage of sampling resistor and thermo-sensitive resistor coupling.
Include the sampling resistor being arranged in series and thermo-sensitive resistor, temperature sensitive electricity by adopting above-mentioned technical proposal, sampling unit
The characteristics of resistance has variation with temperature and changes, its advantage has：To temperature sensitive, little thermal inertia, life-span length, small volume with
And simple structure, it is compared to temperature sensor and greatlys save cost, the sampling resistor being arranged in series by thermo-sensitive resistor, profit
Sampled voltage is exported with the principle of electric resistance partial pressure at the node which couples.
Used as improvement of the present utility model, the thermo-sensitive resistor transistor of fitting is arranged.
By adopting above-mentioned technical proposal, special for thermo-sensitive resistor and transistor is placed, on the one hand increases the radiating of transistor
Efficiency, on the other hand makes thermo-sensitive resistor more accurate to the sampling of the temperature of transistor.
Used as improvement of the present utility model, the reference voltage is constituted by two resistance are arranged in series, two electricity
The node output reference voltage of resistance coupling.
By adopting above-mentioned technical proposal, reference voltage is made up of two resistance being arranged in series, using electric resistance partial pressure
Principle at the node that two resistance are coupled output reference voltage.
Used as improvement of the present utility model, two resistance at least one are adjustable resistance.
By adopting above-mentioned technical proposal, two resistance at least one are set to adjustable resistance, due to power supply mould
The service life of block increases, and the components and parts and circuit inside power module are easily aging, and its heat-resisting effect is worse, so arranging
One adjustable resistance, by adjusting the resistance of adjustable resistance, makes the sampling of reference voltage more accurate.
Used as improvement of the present utility model, the comparing unit includes comparator and NPN triode, the comparator same
It is used for receiving sampled voltage to input coupling sampling unit, the reverse input end of the comparator is used for receiving reference voltage,
The outfan of the comparator couples the base stage of NPN triode, the colelctor electrode coupling power supply of the NPN triode, the NPN tri-
The transmitting collection coupling alarm unit of level pipe.
Comparator is set to by adopting above-mentioned technical proposal, comparing unit, defeated when being more than reverse in the same direction using comparator
Go out this law of high level, the input coupling sampling unit in the same direction of comparator, the reverse input end of comparator are used for connecing
Receive reference voltage, for comparing sampled voltage and reference voltage, when sampled voltage be more than reference voltage when output high level and on
The alarm signal that states, NPN triode do switching component herein, and the base stage of NPN triode couples the outfan of comparator,
The colelctor electrode coupling power supply of NPN triode, the transmitting collection coupling alarm unit of NPN triode, receives alarm signal at base stage
Number when, NPN triode turn on, make alarm unit obtain electric work.
Used as improvement of the present utility model, the comparing unit is set to single input AND gate, the single input
The input coupling sampling unit of AND gate, the outfan coupling alarm unit of the single input AND gate.
Single input AND gate, single input and gate logic are set to by adopting above-mentioned technical proposal, comparing unit
Circuit has when input is high level signal, exports high level signal, and high potential herein is higher than a reference voltage, is somebody's turn to do
Reference voltage depends on the setting of AND gate.
Used as improvement of the present utility model, the alarm unit is set to light emitting diode.
Light emitting diode is set to by adopting above-mentioned technical proposal, alarm unit, when alarm signal is received, is lighted
Diode obtains electroluminescence to play warning function.
Used as improvement of the present utility model, the alarm unit is set to buzzer.
Buzzer is set to by adopting above-mentioned technical proposal, alarm unit, the report of the light emitting diode buzzer that compares
Alert effect is better.
Used as improvement of the present utility model, the alarm unit also includes a speech chip concatenated with the buzzer.
Also include a speech chip by adopting above-mentioned technical proposal, alarm unit, can pass through in advance in speech chip
In in advance typing alarm sound " will explode " etc., make alarming effect more preferably.
In sum, this utility model has the advantages that：The integration density of electron plate in AC/DC power modules
High, and transistor heat-resisting ability is poor, so the temperature of transistor is higher to make transistor damage, so arrange one sampling
Unit is sampled to the temperature of transistor, and temperature signal is converted to voltage signal output and sampled voltage, comparing unit
Sampling unit is coupled to, for being compared according to a reference voltage and sampled voltage, when sampled voltage is more than reference voltage
Represent that temperature is too high, now, output alarm signal, alarm unit is in response to alarm signal reminding user of service's AC/DC moulds
The transistor exception of block, needs to take measures to prevent transistor scaling loss, to produce economic loss.
Description of the drawings
Fig. 1 is the connection circuit figure of embodiment 1；
Fig. 2 is the connection circuit figure of embodiment 2；
Fig. 3 is the alarm unit connection circuit figure of embodiment 3；
Fig. 4 is the connection circuit figure of embodiment 4.
In figure, 1, sampling unit；2nd, reference cell；3rd, comparing unit；4th, alarm unit.
Specific embodiment
This utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1,
With reference to shown in Fig. 1, the AC/DC power modules of overheat warning, including transistor, sampling unit 1, reference cell 2, ratio
Compared with unit 3 and alarm unit 4, wherein, sampling unit 1 is used for the temperature for detecting transistor, and the sampling unit 1 includes that series connection sets
The sampling resistor R1 for putting and thermo-sensitive resistor RT, the characteristics of thermo-sensitive resistor RT has variation with temperature and changes, its advantage has：
To temperature sensitive, little thermal inertia, life-span length, small volume and simple structure, it is compared to temperature sensor and greatlys save into
This, the sampling resistor R1 being arranged in series by thermo-sensitive resistor RT is exported at the node which couples using the principle of electric resistance partial pressure
Sampled voltage, in order that testing result is more accurate, is arranged thermo-sensitive resistor laminating transistor, and the thermo-sensitive resistor is negative temperature coefficient
Thermo-sensitive resistor；Reference cell 2 is used for providing a reference voltage, and the reference cell 2 includes two resistance R4 and R3 being arranged in series,
Using electric resistance partial pressure principle at the node that two resistance are coupled output reference voltage, two resistance at least one are set to
Adjustable resistance, as the service life with power module increases, the components and parts and circuit inside power module are easily aging,
Its heat-resisting effect is worse, so arranging an adjustable resistance, by adjusting the resistance of adjustable resistance, makes the sampling of reference voltage more
Precisely；Comparing unit 3 is used for benchmark voltage and sampled voltage, and it includes comparator and NPN triode VT1, using comparing
This law of high level is exported when device is more than reverse in the same direction, the input coupling sampling unit 1 in the same direction of comparator, comparator
Reverse input end be used for receive reference voltage, for comparing sampled voltage and reference voltage, when sampled voltage more than benchmark electricity
Output high level and above-mentioned alarm signal during pressure, NPN triode VT1 do switching component herein, NPN triode VT1
Base stage couples the outfan of comparator, the colelctor electrode coupling power supply of NPN triode VT1, the transmitting collection coupling of NPN triode VT1
Alarm unit 4, when receiving alarm signal at the base stage, NPN triode VT1 is turned on, make alarm unit 4 electric work, the reality
The alarm unit 4 that applies in example is set to light emitting diode, obtains electroluminescence to play when light emitting diode receives alarm signal
Warning function, and the power module arranges a terminal for being used for output alarm signal, the terminal connecting luminous diode.
Embodiment 2,
With reference to shown in Fig. 2, the AC/DC power modules of overheat warning, as different from Example 1, report in the embodiment
Alert unit 4 is set to buzzer B1, buzzer B1 compare light emitting diode warning effect more excellent, but, buzzing
Device B1 is applied to the larger place in space.
Embodiment 3,
With reference to shown in Fig. 3, the AC/DC power modules of overheat warning, as different from Example 2, the alarm unit 4 is in honeybee
Ring device B2 on concatenate a speech chip NVC, can in the form of pre- typing on speech chip NVC advance typing number voice,
Such as " will explode " etc., when buzzer B2 obtains electric work, make alarm sound various, prompting is better, but be in response to
Cost can increase.
Embodiment 4,
With reference to shown in Fig. 4, the AC/DC power modules of overheat warning, as different from Example 1, the embodiment with door
Logic circuit substituted for comparator, should be 2.7V with the reference voltage of gate logic unit, when the section of sampling unit R1 and RT coupling
When the voltage exported at point is higher than 2.7V, it is judged to high level signal, now, AND gate exports high level signal, NPN
The base stage of audion VT4 outputs receives high level signal conducting, turns on alarm unit 4, and the alarm unit 4 includes that series connection sets
The light emitting diode that puts and a resistance R5, when alarm signal is received, light emitting diode obtain electric, resistance R5 be cement resistor,
Use as protective resistance herein, for protecting light emitting diode when being powered suddenly, light emitting diode scaling loss.
Above-mentioned thermo-sensitive resistor RT is negative temperature coefficient thermo-sensitive resistor, and with when the temperature increases, the resistance of resistance reduces
The characteristics of.
This specific embodiment is only which is not to restriction of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification without creative contribution after this specification is read as needed to the present embodiment, but
As long as all being protected by Patent Law in right of the present utility model.
Claims (10)
1. AC/DC power modules of a kind of overheat warning, including transistor, it is characterised in that：Also include
Sampling unit (1), for detecting the temperature of transistor, and exports sampled voltage；
Comparing unit (3), is coupled to sampling unit (1), for comparing according to a reference voltage and sampled voltage, works as sampled voltage
More than output alarm signal during reference voltage；
Alarm unit (4), is coupled to the comparing unit (3), reminds user of service's AC/DC power supply moulds in response to alarm signal
Block is using abnormal.
2. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：Described sampling unit (1) wraps
Include the node output sampled voltage of the sampling resistor and thermo-sensitive resistor being arranged in series, the sampling resistor and thermo-sensitive resistor coupling.
3. AC/DC power modules of overheat warning according to claim 2, it is characterised in that：The thermo-sensitive resistor laminating
The transistor is arranged.
4. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：The reference voltage be by
It is arranged in series two resistance to provide, the node output reference voltage of two resistance couplings.
5. AC/DC power modules of overheat warning according to claim 4, it is characterised in that：Two resistance are at least
One is adjustable resistance.
6. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：Described comparing unit (3) wrap
Comparator and NPN triode is included, input coupling sampling unit (1) in the same direction of the comparator is used for receiving sampled voltage, institute
The reverse input end for stating comparator is used for receiving reference voltage, and the outfan of the comparator couples the base stage of NPN triode, institute
State the colelctor electrode coupling power supply of NPN triode, transmitting collection coupling alarm unit (4) of the NPN triodes.
7. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：Comparing unit (3) set
Single input AND gate is set to, input coupling sampling unit (1) of the single input AND gate, the list are defeated
Enter outfan coupling alarm unit (4) of AND gate.
8. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：Alarm unit (4) set
It is set to light emitting diode.
9. AC/DC power modules of overheat warning according to claim 1, it is characterised in that：Alarm unit (4) set
It is set to buzzer.
10. AC/DC power modules of overheat warning according to claim 9, it is characterised in that：Alarm unit (4)
Also include a speech chip concatenated with the buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620537021.1U CN206023190U (en) | 2016-06-03 | 2016-06-03 | The AC/DC power modules of overheat warning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620537021.1U CN206023190U (en) | 2016-06-03 | 2016-06-03 | The AC/DC power modules of overheat warning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206023190U true CN206023190U (en) | 2017-03-15 |
Family
ID=58242672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620537021.1U Expired - Fee Related CN206023190U (en) | 2016-06-03 | 2016-06-03 | The AC/DC power modules of overheat warning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206023190U (en) |
-
2016
- 2016-06-03 CN CN201620537021.1U patent/CN206023190U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 Termination date: 20200603 |
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| CF01 | Termination of patent right due to non-payment of annual fee |