CN208314158U - A kind of prior-warning device of power-supply system - Google Patents
A kind of prior-warning device of power-supply system Download PDFInfo
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- CN208314158U CN208314158U CN201820903858.2U CN201820903858U CN208314158U CN 208314158 U CN208314158 U CN 208314158U CN 201820903858 U CN201820903858 U CN 201820903858U CN 208314158 U CN208314158 U CN 208314158U
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Abstract
A kind of prior-warning device of power-supply system, comprising: detection module detects signal for receiving early warning from least one system device of the power-supply system；Pre-warning signal generation module, for generating pre-warning signal based on early warning detection signal；Warning module, for carrying out early warning prompting based on the pre-warning signal；Wherein the detection module is electrically connected the system device, and the pre-warning signal generation module communicates to connect the detection module, and the warning module connects the pre-warning signal generation module.Implement the prior-warning device of the power-supply system of the utility model, power-supply system occurs to carry out early warning before protection or failure, and personnel are handled in advance so as to system maintenance, and Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.
Description
Technical field
The utility model relates to power-supply systems, more specifically to a kind of prior-warning device of power-supply system.
Background technique
Existing power-supply system is mainly by AC distribution, Switching Power Supply, monitoring device, battery, air-conditioning and earthed system
Composition is made of a part therein.Power-supply system has certain intelligence at present, when protection or event occur for system
Barrier, concrete position, the time etc. that monitoring unit energy display alarm event occurs.But when protection or failure occurs, switch electricity
Source generally no longer output voltage perhaps export electric current it is serious when even can aircraft bombing or cause fire accident.
Therefore, it is necessary to carry out early warning before protection or failure occur for power-supply system, so as to system maintenance, personnel shift to an earlier date
It is handled, Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a provenance system
Prior-warning device, can power-supply system occur protection or failure before carry out early warning, so as to system maintenance, personnel shift to an earlier date
It is handled, Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of early warning dress of power-supply system
It sets, comprising:
Detection module detects signal for receiving early warning from least one system device of the power-supply system；
Pre-warning signal generation module, for generating pre-warning signal based on early warning detection signal；
Warning module, for carrying out early warning prompting based on the pre-warning signal；
Wherein the detection module is electrically connected the system device, and the pre-warning signal generation module communicates to connect the inspection
Module is surveyed, the warning module connects the pre-warning signal generation module.
In the prior-warning device of power-supply system described in the utility model, the system device includes: DC fan, switch
Power supply, optocoupler and radiating element.
In the prior-warning device of power-supply system described in the utility model,
The detection module includes:
It is electrically connected with the DC fan to receive the fan detecting of fan early warning detection signal from the DC fan；
It is electrically connected with the PFC capacitor of the PFC capacitor of the Switching Power Supply and overvoltage crowbar to receive PFC drift early warning
Detect the PFC drift detection element of signal；
It is electrically connected with the DC capacitor of the DC capacitor of the Switching Power Supply and overvoltage crowbar to receive DC drift early warning inspection
Survey the DC drift detection element of signal；
It is electrically connected with the PFC capacitor of the Switching Power Supply to receive the PFC capacitance detecting list of PFC capacitor early warning detection signal
Member；
It is electrically connected with the optocoupler to receive the optocoupler detection unit of optocoupler early warning detection signal；And/or
The temperature detecting unit that its temperature pre-warning detection signal is received at the radiating element is set；
The pre-warning signal generation module includes:
It is electrically connected with the fan detecting to generate fan pre-warning signal based on fan early warning detection signal
Fan pre-warning signal generation unit；
It is electrically connected with the PFC drift detection element pre- to generate PFC drift based on PFC drift early warning detection signal
The PFC drift pre-warning signal generation unit of alert signal；
It is electrically connected with the DC drift detection element to generate DC drift early warning based on DC drift early warning detection signal
The DC drift pre-warning signal generation unit of signal；
It is electrically connected with the PFC capacitance detection unit pre- to generate PFC capacitor based on PFC capacitor early warning detection signal
The PFC capacitor pre-warning signal generation unit of alert signal；
It is electrically connected with the optocoupler detection unit to generate optocoupler pre-warning signal based on optocoupler early warning detection signal
Optocoupler pre-warning signal generation unit；And/or
It is electrically connected with the temperature detecting unit to generate temperature pre-warning signal based on temperature pre-warning detection signal
Temperature pre-warning signal generation unit.
In the prior-warning device of power-supply system described in the utility model,
The fan detecting includes:
It is electrically connected with the fan rotating speed signals pin of the DC fan to sample the sampling of the revolving speed of the fan rotating speed signals
It circuit and is electrically connected with the pwm signal pin of the DC fan to sample the PWM sample circuit of the pwm signal；
The fan pre-warning signal generation unit includes:
Speed-frequency counting circuit detects speed-frequency for calculating fan based on the fan rotating speed signals；
Frequency threshold counting circuit, for based on the pwm signal, the DC fan fan revolution and surplus calculate
Speed-frequency threshold value；
Frequency comparator, for generating the fan based on fan detection speed-frequency and the speed-frequency threshold value
Pre-warning signal；
The speed-frequency counting circuit and the rotating speed sample circuit communicate to connect, the frequency threshold counting circuit with
The PWM sample circuit communication connection, the frequency comparator and the speed-frequency counting circuit and the frequency threshold meter
Calculate circuit communication connection.
In the prior-warning device of power-supply system described in the utility model,
The PFC drift detection element include: respectively with the PFC capacitor of the Switching Power Supply and the overvoltage crowbar
PFC capacitor electrical connection with obtain the first PFC output voltage or electric current with the PFC of the 2nd PFC output voltage or electric current sample electricity
Road；
PFC drift pre-warning signal generation unit includes:
PFC voltage or current comparator, for defeated based on the first PFC output voltage or electric current and the 2nd PFC
The difference of voltage or electric current generates the PFC drift pre-warning signal out；
The PFC voltage or current comparator are electrically connected with the PFC sample circuit.
In the prior-warning device of power-supply system described in the utility model,
The DC drift detection element include: respectively with the DC capacitor of the Switching Power Supply and the overvoltage crowbar
DC capacitor is electrically connected to obtain the DC sample circuit of the first DC output voltage or electric current and the second DC output voltage or electric current；
DC drift pre-warning signal generation unit includes:
D/C voltage or current comparator, for based on first DC output voltage or electric current and the 2nd DC output electricity
Pressure or the difference of electric current generate the DC drift pre-warning signal；
The D/C voltage or current comparator are electrically connected with the DC sample circuit.
In the prior-warning device of power-supply system described in the utility model,
The PFC capacitance detection unit includes: to be electrically connected with the PFC capacitor of the Switching Power Supply to obtain ripple voltage
PFC ripple sample circuit；
The PFC capacitor pre-warning signal generation unit includes:
Ripple comparator, for generating PFC capacitor pre-warning signal based on the ripple voltage；
The ripple comparator is electrically connected with the PFC ripple sample circuit.
In the prior-warning device of power-supply system described in the utility model,
The optocoupler detection unit includes: to be electrically connected with the secondary side of the optocoupler to receive the pair of optical coupling secondary edges voltage signal
Polygonal voltage sample circuit；
The optocoupler pre-warning signal generation unit includes:
Optocoupler voltage comparator, for generating the optocoupler pre-warning signal based on the optical coupling secondary edges voltage signal；
The optocoupler voltage comparator is electrically connected with the secondary voltage sample circuit.
In the prior-warning device of power-supply system described in the utility model,
The temperature detecting unit includes:
It is arranged in inside the radiating element and is dissipated with the device temperature sensor of receiving device temperature and/or setting described
The environment temperature sensor of environment temperature is received around thermal device；
The temperature pre-warning signal generation unit includes:
Temperature comparator, for generating the temperature pre-warning signal based on the device temperature and/or the environment temperature；
The temperature comparator with communicated to connect respectively with the device temperature sensor and the environment temperature sensor.
In the prior-warning device of power-supply system described in the utility model, the warning module includes:
Monitoring unit, for the pre-warning signal to be supplied to monitoring personnel；And/or
Acousto-optic hint circuit, for carrying out acousto-optic prompting based on the pre-warning signal；
Wherein the monitoring unit and the pre-warning signal generation module communicate to connect, the acousto-optic hint circuit with it is described
Switching Power Supply electrical connection, the microcontroller of the Switching Power Supply and the pre-warning signal generation module communicate to connect.
By implementing the prior-warning device of the power-supply system of the utility model, can power-supply system occur protection or failure it
Preceding carry out early warning, so as to system maintenance, personnel are handled in advance, so that Switching Power Supply be avoided to exit work, aircraft bombing or initiation
Fire accident.Further, early warning prompting is carried out by multiple system devices to power-supply system, can prevents various situations from leading
Switching Power Supply caused by the failure of the power-supply system of cause exits work, aircraft bombing or initiation fire accident, better assures power supply
The stability of system.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the functional block diagram of the first embodiment of the prior-warning device of the power-supply system of the utility model；
Fig. 2 is the functional block diagram of the second embodiment of the prior-warning device of the power-supply system of the utility model；
Fig. 3 is the module diagram of the Switching Power Supply of embodiment illustrated in fig. 2.
Specific embodiment
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.
The utility model relates to a kind of prior-warning devices of power-supply system, comprising: detection module is used for from the power-supply system
At least one system device receive early warning detect signal；Pre-warning signal generation module, for detecting signal based on the early warning
Generate pre-warning signal；Warning module, for carrying out early warning prompting based on the pre-warning signal；The wherein detection module electrical connection
The system device, the pre-warning signal generation module communicate to connect the detection module, and the warning module connection is described pre-
Alert signal generation module.Implement the utility model power-supply system prior-warning device, power-supply system occur protection or failure it
Preceding carry out early warning, so as to system maintenance, personnel are handled in advance, and Switching Power Supply is avoided to exit work, and aircraft bombing or initiation are on fire
Accident.
Fig. 1 is the functional block diagram of the first embodiment of the prior-warning device of the power-supply system of the utility model.As shown in Figure 1,
The prior-warning device of the power-supply system of the utility model includes: detection module 100, pre-warning signal generation module 200 and warning module
300.The detection module 100 is electrically connected at least one system device 400 of the power-supply system to be used for from the system device
400, which receive early warning, detects signal.In a preferred embodiment of the utility model, the system device 400 includes: PWM wind
In at least one or more in fan, Switching Power Supply, optocoupler and radiating element.In other preferred embodiments of the utility model,
The system device 400 can also include device needed for other power-supply systems.The early warning detection signal can be based on
The difference of device 400 of uniting and it is different.The pre-warning signal generation module 200 communicates to connect the detection module 100 with from described
Detection module 100 receives the early warning and detects signal, and generates pre-warning signal based on early warning detection signal.For example, described pre-
Alert signal generation module 200 can be comparison circuit, module or device, and the early warning received detection signal is compared
Compared with, or the early warning received is detected into signal and is compared with pre-stored threshold value, and generates early warning based on comparative result
Signal.The warning module 300 connects the pre-warning signal generation module 200, to connect from the pre-warning signal generation module 200
The pre-warning signal is received, and early warning prompting is carried out based on the pre-warning signal.It is described in a preferred embodiment of the utility model
Warning module 300 can be the monitoring unit of power-supply system, communicate to connect with the pre-warning signal generation module 200, by institute
Display of the pre-warning signal by monitoring unit, LED light or buzzer are stated, speech player is supplied to system maintenance personnel,
So that it is handled in advance, Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.It originally is being utility model
In another preferred embodiment, the warning module 300 may include the acousto-optic hint circuit being arranged in Switching Power Supply, the sound
Light cue circuit, which can be, is connected to LED light, buzzer or speech player of DC output end of Switching Power Supply etc..Certainly
The acousto-optic hint circuit also can connect the other component in Switching Power Supply, such as PFC capacitor is nearby etc..In the embodiment
In, the microcontroller of the Switching Power Supply and the pre-warning signal generation module 200 are communicated to connect to generate from the pre-warning signal
Module 200 receives the pre-warning signal, and controls the acousto-optic hint circuit based on the pre-warning signal and directly carry out acousto-optic
It reminds.
Implement the prior-warning device of the power-supply system of the utility model, power-supply system occurs to carry out before protection or failure pre-
Alert, so as to system maintenance, personnel are handled in advance, and Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.
Fig. 2 is the functional block diagram of the second embodiment of the prior-warning device of the power-supply system of the utility model.As shown in Fig. 2,
The prior-warning device of the power-supply system of the utility model includes: detection module 100, pre-warning signal generation module 200 and warning module
300。
In the present embodiment, the system device 400 includes: DC fan 410, Switching Power Supply 420, optocoupler 430, heat dissipation
Device 440.In the present embodiment, for DC fan 410, the detection module 100 includes: to be electrically connected with the DC fan 410
It connects to receive the fan detecting 110 of fan early warning detection signal from the DC fan 410, the pre-warning signal generates mould
Block 200 includes being electrically connected with the fan detecting 110 to generate fan early warning letter based on fan early warning detection signal
Number fan pre-warning signal generation unit 210.
Fig. 3 is the module diagram of the Switching Power Supply of embodiment illustrated in fig. 2.As shown in figure 3, Switching Power Supply 420 includes PFC
Module 421, PFC capacitor C1, DC/DC module 422, DC capacitor C2, overvoltage crowbar 424 and microcontroller 423.
In the further preferred embodiment of the utility model, the microcontroller 423 can be single-chip microcontroller or
DSP.In the present embodiment, for Switching Power Supply 420, the detection module 100 includes: and the PFC of the Switching Power Supply 420 electricity
It is single to receive the PFC drift detection of PFC drift early warning detection signal to hold the PFC capacitor electrical connection of C1 and overvoltage crowbar 424
Member 120；It is electrically connected with the DC capacitor of the DC capacitor C2 of the Switching Power Supply 420 and overvoltage crowbar 424 to receive DC drift
The DC drift detection element 130 of early warning detection signal；It is electrically connected with the PFC capacitor C1 of the Switching Power Supply 420 to receive PFC electricity
Hold the PFC capacitance detection unit 140 of early warning detection signal.Accordingly, the pre-warning signal generation module 200 include: with it is described
The electrical connection of PFC drift detection element 120 is with the PFC based on PFC drift early warning detection signal generation PFC drift pre-warning signal
Drift pre-warning signal generation unit 220；It is electrically connected with the DC drift detection element 130 based on DC drift early warning detection
Signal generates the DC drift pre-warning signal generation unit 230 of DC drift pre-warning signal；With 140 electricity of PFC capacitance detection unit
Connection is with the PFC capacitor pre-warning signal generation unit based on PFC capacitor early warning detection signal generation PFC capacitor pre-warning signal
240。
In the present embodiment, for optocoupler 430, the detection module 100 includes: to be electrically connected with the optocoupler 430 to connect
Receive the optocoupler detection unit 150 of optocoupler early warning detection signal.It is corresponding, the pre-warning signal generation module 200 include: with it is described
The electrical connection of optocoupler detection unit 150 is with the optocoupler pre-warning signal based on optocoupler early warning detection signal generation optocoupler pre-warning signal
Generation unit 250.
In the present embodiment, for radiating element 440, the detection module 100 includes: to be arranged in the radiating element
The temperature detecting unit 160 of its temperature pre-warning detection signal is received at 440.It is corresponding, the pre-warning signal generation module 200
It include: to be electrically connected with the temperature detecting unit 160 to generate temperature pre-warning signal based on temperature pre-warning detection signal
Temperature pre-warning signal generation unit 260.
Those skilled in the art know, in the simplified embodiment of the utility model, the system device 400 can be only
Including DC fan 410.And the detection module 100 can only include fan detecting 110, the pre-warning signal generates
Module 200 can only include fan pre-warning signal generation unit 210.Similarly, the system device 400 can only include
One of DC fan 410, Switching Power Supply 420, optocoupler 430, radiating element 440, both or more than.And the detection mould
Block 100 and the pre-warning signal generation module 200 can be correspondingly arranged.Introduction based on the utility model, those skilled in the art
Member it is conceivable that and construct the prior-warning device of such power-supply system, be just not repeated herein.
In the preferred embodiment, the fan detecting 110 includes: to believe with the rotation speed of the fan of the DC fan 410
The electrical connection of number pin is to sample the rotating speed sample circuit 111 of the fan rotating speed signals and the PWM with the DC fan 410
Signal pins are electrically connected to sample the PWM sample circuit 112 of the pwm signal.Preferably, 111 He of rotating speed sample circuit
The PWM sample circuit 112 can be resistance sampling circuit.In the preferred embodiment, the fan pre-warning signal generates single
Member 210 includes: speed-frequency counting circuit 211, frequency threshold counting circuit 212 and frequency comparator 213.The speed-frequency
Counting circuit 211 and the rotating speed sample circuit 111 are communicated to connect to receive the fan rotating speed signals and based on the fan
Tach signal calculates fan and detects speed-frequency.The frequency threshold counting circuit 212 is communicated with the PWM sample circuit 112
Connection based on the pwm signal and is stored in advance or from the PWM of the DC fan 410 with receiving the pwm signal
The fan revolution and surplus of the DC fan 410 directly acquired in controller calculate speed-frequency threshold value.The frequency compares
Device 213 and the communication connection of the speed-frequency counting circuit 211 and the frequency threshold counting circuit 212 are to receive the fan
Speed-frequency and the speed-frequency threshold value are detected, and is less than the speed-frequency threshold value in fan detection speed-frequency,
Or both difference be greater than a certain range when, generate the fan pre-warning signal.In the preferred embodiment of the utility model
In, any equipment that can be known in the art, module, device constructs the speed-frequency counting circuit 211, frequency threshold
Counting circuit 212 and frequency comparator 213.In another embodiment of the utility model, function can be captured using band pwm signal
The microcontroller (single-chip microcontroller or DSP, such as the eCAP module of TMS32F2803x DSP) of energy, to detect fan detection revolving speed
Frequency.
If DC fan 410, due to dust stratification, corrosion, wear etc., revolving speed can reduce, fan can stop to a certain extent
Turn, the overheat of Switching Power Supply 410 is caused to exit work.Usually there are four pins for DC fan 410: power pins, grounding pin, wind
Fan tach signal pin, pwm signal pin.By detecting the frequency of the fan rotating speed signals, by itself and rotation speed of the fan frequency
Threshold value is compared, so that it may judge whether the revolving speed of DC fan reduces, to carry out early warning.For example, when DC fan completely turns
Rotation speed of the fan be (20000 ± 10%) rpm/min, pwm signal duty ratio 35%~100%.Described in when so working normally
It is 210~733HZ that fan, which detects speed-frequency,.If detecting the fan detection speed-frequency lower than 186HZ, then it is assumed that wind
Fanning revolving speed reduces, and generates the fan pre-warning signal.In this way, passing through detection fan early warning letter when power-supply system works normally
Number, so that Switching Power Supply be avoided to exit work.
In the preferred embodiment, the PFC drift detection element 120 include: respectively with the Switching Power Supply 420
The electrical connection of the PFC capacitor of PFC capacitor C1 and the overvoltage crowbar 424 is to obtain the first PFC output voltage or electric current with the
The PFC sample circuit 121 of two PFC output voltages or electric current.Corresponding PFC drift pre-warning signal generation unit 220 includes:
The PFC voltage or current comparator 221 being electrically connected with the PFC sample circuit 121.The PFC voltage or current comparator 221 from
The PFC sample circuit 121 receives the first PFC output voltage or electric current with the 2nd PFC output voltage or electric current, and for being based on institute
The difference for stating the first PFC output voltage or electric current and the 2nd PFC output voltage or electric current generates the PFC drift early warning letter
Number.Those skilled in the art personnel know, can the PFC sample circuit 121 can be resistance sampling circuit, can be only
Using current signal, at least one of voltage signal.
In Switching Power Supply 420, resistance value is caused to be drifted about since the sampling resistor of PFC voltage is easy to be corroded, due to safety
It is required that overvoltage crowbar 424 can be arranged in Switching Power Supply 420, it is defeated to acquire two-way PFC by using PFC sample circuit 121
Voltage or electric current out, and further compare the difference of the two using PFC voltage or current comparator 221, if exceeding certain model
It encloses, thinks that resistance value is drifted about, generate the PFC drift pre-warning signal.PFC voltage and the sampling resistor of output voltage itself cause
Accuracy error can be eliminated by calibrating, PFC voltage accuracy requirement be ± 4V, for example, if detect the first PFC export
The difference of voltage and the 2nd PFC output voltage is greater than 8.8V, then it is assumed that the drift of sampling resistor resistance value generates PFC drift pre-warning signal.
Similarly, similar with PFC drift detection for the principle of DC drift detection.Therefore, in the present embodiment, the DC drift
It includes: electric with the DC of the DC capacitor C2 of the Switching Power Supply 420 and the overvoltage crowbar 424 respectively for moving detection unit 130
Hold electrical connection to obtain the DC sample circuit 131 of the first DC output voltage or electric current and the second DC output voltage or electric current.It is described
DC drift pre-warning signal generation unit 230 includes: the D/C voltage being electrically connected with the DC sample circuit 131 or current comparator
231.The D/C voltage or current comparator 231 receive the first DC output voltage or electric current with the second DC output voltage or electric current,
And for generating the DC based on first DC output voltage or electric current and second DC output voltage or the difference of electric current
Drift about pre-warning signal.Those skilled in the art personnel know, can the DC sample circuit 131 can be resistance sampling circuit,
It can be only at least one of current signal, voltage signal.
As previously mentioned, cause resistance value to be drifted about since the sampling resistor of D/C voltage is easy to be corroded in Switching Power Supply 420,
Due to safety requirement, overvoltage crowbar 424 can be set in Switching Power Supply 420, by using the acquisition of DC sample circuit 131 two
Road PFC output voltage or electric current, and further compare the difference of the two using D/C voltage or current comparator 231, if exceeded
A certain range then thinks that resistance value is drifted about, and generates the PFC drift pre-warning signal.Caused by sampling resistor of DC output voltage itself
Accuracy error can be eliminated by calibrating, and D/C voltage required precision is ± 0.5V, for example, if detecting the first DC output electricity
It presses and the difference of the second DC output voltage is greater than 1.1V, then it is assumed that the drift of sampling resistor resistance value generates DC drift pre-warning signal.
In the preferred embodiment, the PFC capacitance detection unit 140 includes: and the PFC of the Switching Power Supply 420 electricity
Hold electrical connection to obtain the PFC ripple sample circuit 141 of ripple voltage.The PFC capacitor pre-warning signal generation unit 240 includes
The ripple comparator 241 being electrically connected with the PFC ripple sample circuit 141.The ripple comparator 241 is from the PFC ripple
Sample circuit 141 receives the ripple voltage, and PFC capacitor is generated when the ripple voltage is higher than the setting value with storage
Pre-warning signal.In the present invention, PFC ripple sample circuit 141 can be any voltage sample dress as known in the art
It sets.PFC capacitor C1 is because the reasons capacity such as electricity/thermal mechanical stress can decline, for example it is 330uF, 450V, nominal operation shape
Ripple voltage under state is 10Vrms, if the ripple voltage under detecting instantaneous operating conditions is greater than 15Vrms, then it is assumed that PFC
Capacitance decline, generates PFC capacitor pre-warning signal.
In the preferred embodiment, the optocoupler detection unit 150 includes being electrically connected with the secondary side of the optocoupler to receive
The secondary voltage sample circuit 151 of optical coupling secondary edges voltage signal.The optocoupler pre-warning signal generation unit 250 include: with it is described
The optocoupler voltage comparator 251 that secondary voltage sample circuit 151 is electrically connected.The optocoupler voltage comparator 251 is from the secondary side
Voltage sampling circuit 151 receives the optical coupling secondary edges voltage signal, and it is compared with rated value, if it is lower than the volume
Definite value, or it is higher than a certain setting value with the difference of the rated value, generate the optocoupler pre-warning signal.
Each system device of power-supply system, such as Switching Power Supply 420, it is usual between internal single-chip microcontroller or DSP circuit
Multiple optocouplers can be arranged to be isolated.Current transfer ratio CTR is the important parameter of optocoupler, can be with DC current transfer ratio come table
Show.When output voltage is kept constant, it is equal to the percentage of average anode current and direct current input current.Due to thermal stress,
If very high environment temperature and biggish positive LED current, the CTR that works long hours can decline, telecommunication circuit is caused to fail.Generally set
Timing CTR will consider 30% or so decaying, usually drop to 30% or the 50% of nominal value with CTR as failure criteria.?
When not considering the influence of other devices of primary side and secondary side, when CTR decline, it will lead to optical coupling secondary edges output electric current and reduce, therefore
The optical coupling secondary edges voltage signal can be detected by the secondary voltage sample circuit 151 judge whether CTR declines.Such as institute
Stating optical coupling secondary edges voltage signal is 5v, if detecting output voltage lower than 4v, then it is assumed that it is pre- to generate the optocoupler for CTR decline
Alert signal.
In the preferred embodiment, the temperature detecting unit 160 include: be arranged inside the radiating element 440 with
The environment temperature that environment temperature is received around the radiating element is arranged in the device temperature sensor 161 of receiving device temperature
Spend sensor 162.The temperature pre-warning signal generation unit 260 include: respectively with the device temperature sensor 161 and described
The temperature comparator 261 that environment temperature sensor 162 communicates to connect.The temperature comparator 261 is by the device temperature and institute
Environment temperature is stated to be compared, the device temperature be higher than the environment temperature, or both difference be higher than a setting value when
Generate the temperature pre-warning signal.Or the temperature detecting unit 160 only includes: being arranged in the radiating element 440
With the device temperature sensor 161 of receiving device temperature, the temperature comparator 216 can be by the device temperature and setting in portion
Temperature value is compared, and when the device temperature is higher than set temperature, generates the temperature pre-warning signal.Or the temperature
Degree detection unit 160 only includes: the environment temperature sensor 162 that environment temperature is received around the radiating element is arranged in.
The environment temperature can be compared by the temperature comparator 216 with set temperature value, be higher than in the environment temperature and set
When determining temperature, the temperature pre-warning signal is generated.
In the preferred embodiment of the utility model, which can be socket, input/output port, PFC
The radiator of MOS, DCDC MOS or diode.Socket can be because the reasons such as poor contact, design problem, overpower lead to temperature
It increases, causes fire accident.It can detecte the device temperature of socket or input/output end port and the environment temperature of surrounding,
When device temperature is higher than environment temperature a certain range, it is believed that temperature drift generates the temperature pre-warning signal.In another example can
To detect the device temperature of input/output end port socket, the device temperature of the radiator of PFC MOS, DCDC MOS or diode,
The temperature pre-warning signal is generated if beyond 100 degree.
In the present embodiment, the warning module 300 connects the pre-warning signal generation module 200, with from the early warning
Signal generation module 200 receives the fan pre-warning signal, PFC drift pre-warning signal, DC drift pre-warning signal, PFC capacitor early warning
Signal, optocoupler pre-warning signal, temperature pre-warning signal, and early warning prompting is carried out based on the pre-warning signal.In the preferred embodiment,
The warning module 300 may include the acousto-optic hint circuit being arranged in Switching Power Supply 420, which is connection
In LED light, buzzer or the speech player of DC output end etc. of Switching Power Supply.The microcontroller of the Switching Power Supply 420
Device 423 and the pre-warning signal generation module 200 are communicated to connect to receive the early warning from the pre-warning signal generation module 200 and believe
Number, and the acousto-optic hint circuit is controlled based on the pre-warning signal and directly carries out acousto-optic prompting.In its of the utility model
In his preferred embodiment, the warning module 300 can be the monitoring unit of power-supply system, generate mould with the pre-warning signal
Block 200 communicates to connect, and the fan pre-warning signal, PFC drift pre-warning signal, DC drift pre-warning signal, PFC capacitor early warning are believed
Number, optocoupler pre-warning signal, temperature pre-warning signal by the display of monitoring unit, LED light or buzzer, speech player mention
Feed system maintenance personnel avoids Switching Power Supply from exiting work, aircraft bombing or initiation thing on fire so that it is handled in advance
Therefore.
Those skilled in the art know, for the explanation of the above various system devices, and the specific number wherein used
Value, only in citing purpose, those skilled in the art are and right in accordance with the teachings of the present invention, it is possible to using other numerical value
The type and quantity of system device are rationally designed.
Implement the prior-warning device of the power-supply system of the utility model, power-supply system occurs to carry out before protection or failure pre-
Alert, so as to system maintenance, personnel are handled in advance, and Switching Power Supply is avoided to exit work, aircraft bombing or initiation fire accident.Into
One step, early warning prompting is carried out by multiple system devices to power-supply system, power supply system caused by various situations can be prevented
Switching Power Supply caused by the failure of system exits work, aircraft bombing or initiation fire accident, better assures the stabilization of power-supply system
Property.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of prior-warning device of power-supply system characterized by comprising
Detection module detects signal for receiving early warning from least one system device of the power-supply system；
Pre-warning signal generation module, for generating pre-warning signal based on early warning detection signal；
Warning module, for carrying out early warning prompting based on the pre-warning signal；
Wherein the detection module is electrically connected the system device, and the pre-warning signal generation module communicates to connect the detection mould
Block, the warning module connect the pre-warning signal generation module.
2. the prior-warning device of power-supply system according to claim 1, which is characterized in that the system device includes: PWM wind
Fan, Switching Power Supply, optocoupler and radiating element.
3. the prior-warning device of power-supply system according to claim 2, which is characterized in that
The detection module includes:
It is electrically connected with the DC fan to receive the fan detecting of fan early warning detection signal from the DC fan；
It is electrically connected with the PFC capacitor of the PFC capacitor of the Switching Power Supply and overvoltage crowbar to receive PFC drift early warning detection
The PFC drift detection element of signal；
It is electrically connected with the DC capacitor of the DC capacitor of the Switching Power Supply and overvoltage crowbar to receive DC drift early warning detection letter
Number DC drift detection element；
It is electrically connected with the PFC capacitor of the Switching Power Supply to receive the PFC capacitance detection unit of PFC capacitor early warning detection signal；
It is electrically connected with the optocoupler to receive the optocoupler detection unit of optocoupler early warning detection signal；And/or
The temperature detecting unit that its temperature pre-warning detection signal is received at the radiating element is set；
The pre-warning signal generation module includes:
It is electrically connected with the fan detecting to generate the fan of fan pre-warning signal based on fan early warning detection signal
Pre-warning signal generation unit；
It is electrically connected with the PFC drift detection element to generate PFC drift early warning letter based on PFC drift early warning detection signal
Number PFC drift about pre-warning signal generation unit；
It is electrically connected with the DC drift detection element to generate DC drift pre-warning signal based on DC drift early warning detection signal
DC drift about pre-warning signal generation unit；
It is electrically connected with the PFC capacitance detection unit to generate PFC capacitor early warning letter based on PFC capacitor early warning detection signal
Number PFC capacitor pre-warning signal generation unit；
It is electrically connected with the optocoupler detection unit to generate the optocoupler of optocoupler pre-warning signal based on optocoupler early warning detection signal
Pre-warning signal generation unit；And/or
It is electrically connected with the temperature detecting unit to generate the temperature of temperature pre-warning signal based on temperature pre-warning detection signal
Pre-warning signal generation unit.
4. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The fan detecting includes:
It is electrically connected with the fan rotating speed signals pin of the DC fan to sample the rotating speed sample circuit of the fan rotating speed signals
And it is electrically connected with the pwm signal pin of the DC fan to sample the PWM sample circuit of the pwm signal；
The fan pre-warning signal generation unit includes:
Speed-frequency counting circuit detects speed-frequency for calculating fan based on the fan rotating speed signals；
Frequency threshold counting circuit, for fan revolution and surplus calculating revolving speed based on the pwm signal, the DC fan
Frequency threshold；
Frequency comparator, for generating the fan early warning based on fan detection speed-frequency and the speed-frequency threshold value
Signal；
The speed-frequency counting circuit and the rotating speed sample circuit communicate to connect, the frequency threshold counting circuit with it is described
The communication connection of PWM sample circuit, the frequency comparator and the speed-frequency counting circuit and the frequency threshold calculate electricity
Road communication connection.
5. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The PFC drift detection element includes:
It is electrically connected respectively with the PFC capacitor of the PFC capacitor of the Switching Power Supply and the overvoltage crowbar to obtain the first PFC
Output voltage or electric current are with the 2nd PFC output voltage or the PFC sample circuit of electric current；
PFC drift pre-warning signal generation unit includes:
PFC voltage or current comparator, for based on the first PFC output voltage or electric current and the 2nd PFC output electricity
Pressure or the difference of electric current generate the PFC drift pre-warning signal；
The PFC voltage or current comparator are electrically connected with the PFC sample circuit.
6. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The DC drift detection element includes:
It is electrically connected respectively with the DC capacitor of the DC capacitor of the Switching Power Supply and the overvoltage crowbar defeated to obtain the first DC
The DC sample circuit of voltage or electric current and the second DC output voltage or electric current out；
DC drift pre-warning signal generation unit includes:
D/C voltage or current comparator, for based on first DC output voltage or electric current and second DC output voltage or
The difference of electric current generates the DC drift pre-warning signal；
The D/C voltage or current comparator are electrically connected with the DC sample circuit.
7. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The PFC capacitance detection unit includes:
It is electrically connected with the PFC capacitor of the Switching Power Supply to obtain the PFC ripple sample circuit of ripple voltage；
The PFC capacitor pre-warning signal generation unit includes:
Ripple comparator, for generating PFC capacitor pre-warning signal based on the ripple voltage；
The ripple comparator is electrically connected with the PFC ripple sample circuit.
8. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The optocoupler detection unit includes:
It is electrically connected with the secondary side of the optocoupler to receive the secondary voltage sample circuit of optical coupling secondary edges voltage signal；
The optocoupler pre-warning signal generation unit includes:
Optocoupler voltage comparator, for generating the optocoupler pre-warning signal based on the optical coupling secondary edges voltage signal；
The optocoupler voltage comparator is electrically connected with the secondary voltage sample circuit.
9. the prior-warning device of power-supply system according to claim 3, which is characterized in that
The temperature detecting unit includes:
It is arranged in inside the radiating element with the device temperature sensor of receiving device temperature and/or is arranged in the radiator
The environment temperature sensor of environment temperature is received around part；
The temperature pre-warning signal generation unit includes:
Temperature comparator, for generating the temperature pre-warning signal based on the device temperature and/or the environment temperature；
The temperature comparator with communicated to connect respectively with the device temperature sensor and the environment temperature sensor.
10. according to the prior-warning device of power-supply system described in any one of claim 2-9 claim, which is characterized in that
The warning module includes:
Monitoring unit, for the pre-warning signal to be supplied to monitoring personnel；And/or
Acousto-optic hint circuit, for carrying out acousto-optic prompting based on the pre-warning signal；
Wherein the monitoring unit and the pre-warning signal generation module communicate to connect, the acousto-optic hint circuit and the switch
Power electric connection, the microcontroller of the Switching Power Supply and the pre-warning signal generation module communicate to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820903858.2U CN208314158U (en) | 2018-06-12 | 2018-06-12 | A kind of prior-warning device of power-supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820903858.2U CN208314158U (en) | 2018-06-12 | 2018-06-12 | A kind of prior-warning device of power-supply system |
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| CN208314158U true CN208314158U (en) | 2019-01-01 |
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| CN201820903858.2U Active CN208314158U (en) | 2018-06-12 | 2018-06-12 | A kind of prior-warning device of power-supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112991658A (en) * | 2021-02-08 | 2021-06-18 | 深圳市伊力科电源有限公司 | Fire early warning method and uninterrupted power supply |
-
2018
- 2018-06-12 CN CN201820903858.2U patent/CN208314158U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112991658A (en) * | 2021-02-08 | 2021-06-18 | 深圳市伊力科电源有限公司 | Fire early warning method and uninterrupted power supply |
| CN112991658B (en) * | 2021-02-08 | 2022-12-06 | 深圳市伊力科电源有限公司 | Fire early warning method and uninterrupted power supply |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211230 Address after: Ohio, USA Patentee after: Dimension Corp. Address before: No. 1510, Kansas Avenue, lureen, Ohio, USA Patentee before: VERTIV ENERGY SYSTEMS, Inc. |
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| TR01 | Transfer of patent right |