CN208820547U - Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory - Google Patents
Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory Download PDFInfo
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Abstract
The utility model discloses a kind of temperature measuring equipment applied to cable accessory and its electricity-fetching modules, switching power circuit, it is related to cable connector performance detection technical field, including energy-storage travelling wave tube, it is coupled to voltage input end, for storing the electric energy obtained from voltage input end；Control assembly is parallel to energy-storage travelling wave tube, for controlling the control control electrode power on/off of silicon-controlled D1；Silicon-controlled D1, control electrode are coupled to the control assembly, and anode is coupled to voltage input end；Current Voltage energy storage component is coupled to the cathode and voltage output end of silicon-controlled D1, for caching output voltage and electric current；Energy-storage travelling wave tube charge and discharge cycles, the oscillating voltage after may make voltage output end output buck；By the way that in switching power circuit, energy-storage travelling wave tube and zener diode D2 are arranged in parallel, the voltage of output can be depressured, improve the stability of powering load.
Description
Technical field
The utility model relates to cable connector performance detection technical fields, more specifically, it relates to which a kind of be applied to electricity
Temperature measuring equipment and its electricity-fetching module, the switching power circuit of cable fittings.
Background technique
As urban construction level improves, various cables require away underpass, so supplying power allocation route is increasingly
More uses cable power supply.As cable utilization rate is higher and higher, the number of faults that cable generates is also more and more, and cable event
Barrier will directly influence the power supply of user, and bring great social influence.In the number of faults of cable one third be due to
Caused by cable accessory quality problems.
Cable accessory quality problems mainly have Insulation Problems, poor contact problem etc., but its phenomenon is all cable accessory
Gradually start to generate heat inside installation position, insulate progressive failure.If the temperature change feelings inside cable accessory can be monitored in time
Condition, it will help it is horizontal to improve electric power netting safe running for the potential faults of discovery cable accessory in time.
But cable accessory inner space very little, and it is high to the requirement of the external form of metal, additional tip cannot be generated
Electric discharge either electric field distortion and destroy built-in electrical insulation.Currently, generally being become using the temperature outside infrared thermal imager observation
Change situation, Ye You some electrical power department arranges temperature sensor using cable accessory shell, acquires cable accessory shell temperature in real time
Spend situation of change.But cable accessory running temperature is inquired by thermal imaging system or in cable accessory disposed outside temperature sensor
Actual effect it is excessively poor.The reason is that: first, most of running equipment has cabinet door to be closed, and has carried out electric locking,
Cabinet door can not be opened in the case of electrification, and thermal imaging system is caused not to be available；Second, cable accessory is all done using silastic material
For insulating materials, thickness reaches 1-2cm, and silicon rubber is a kind of good heat-barrier material, therefore the internal heat generated can not
It is transmitted to outside, the external temperature and actual inside temperature spread that thermal imaging system or temperature sensor observe are very big.Therefore,
Traditional technological means can not accurately monitor the temperature variations inside cable accessory, so that cable can not be found in time
The potential faults of attachment, safe operation of electric network stability are lower.
As Authorization Notice No. be CN202454744U Chinese utility model patent disclose it is a kind of with temperature sensor
All insulation formula cable accessory comprising cable adaptor, connecting terminal, equipment casing and insulating plug are arranged in cable adaptor
The conductor wire end of cable, cable is connect with connecting terminal, and connecting terminal is fixed on equipment set by stud connection insulating plug together
It is arranged with cable accessory major insulation outside Guan Shang, insulating plug and equipment casing, cable accessory external screen is arranged outside cable accessory major insulation
Layer is covered, insulating plug lid is fastened on insulating plug one end of cable accessory external shielding layer, wherein being arranged with temperature in the insulating plug
Acquire plug, temperature acquisition and transmitting module, cross-over block, suspension electrode, a spiral shell of temperature acquisition plug and stud
Bolt is threadedly coupled, and temperature acquisition and transmitting module are fixed on temperature acquisition plug, and cross-over block is set to temperature acquisition and hair
It penetrates between module and suspension electrode, by built-in passive type wireless transmission device temperature data is sent to and nearby to be installed
Temperature data acquisition transducing unit realizes the on-line temperature monitoring of all insulation formula cable accessory.When cable accessory charging operation,
According to field distribution principle, there are potential difference between connection plug and suspension electrode, which is adopted by lead for temperature
Collection and transmitting module provide working power.
But during taking electricity using cable accessory internal electric field, there is certain requirement for the electric energy of acquisition.Such as
Authorization Notice No. is the Chinese utility model patent of CN202026161U, is disclosed a kind of for power high voltage equipment monitoring device
High-tension electric field power taking device, including electrode plate, rectification circuit, charging capacitor, voltage regulator circuit, electrode plate setting sets in electrification
Standby surrounding, electrode plate are connected with rectification circuit input end, and rectification circuit output end is in parallel with charging capacitor both ends；Charging electricity
The positive and negative both ends of container are connected through voltage regulator circuit with load.The device takes electricity, rectification circuit by electrode plate around electric field
Transformation DC voltage obtains electric energy to capacitor charging, then powering load.But take in electric process at this, generally
Have that voltage is high, the small feature of electric current, directly by the voltage input charging capacitor of rectification circuit output end output when, charging electricity
Container be easy it is breakdown cause, lead to not powering load.
Utility model content
In view of the deficienciess of the prior art, the first of the utility model is designed to provide a kind of switching power circuit,
Input voltage can be depressured, improve the stability of powering load.
To achieve the above object, the utility model provides following technical solution:
A kind of switching power circuit, with voltage input end and voltage output end, comprising:
Energy-storage travelling wave tube is coupled to the voltage input end, for storing the electric energy obtained from voltage input end；
Control assembly is parallel to the energy-storage travelling wave tube, for controlling the control control electrode power on/off of silicon-controlled D1；
Silicon-controlled D1, control electrode are coupled to the control assembly, and anode is coupled to voltage input end；
Current Voltage energy storage component is coupled to the cathode and voltage output end of the silicon-controlled D1, for caching output
Voltage and current；
When the conducting voltage of the power storage of energy-storage travelling wave tube to control assembly, control assembly is connected and controls silicon-controlled D1
Conducting, Current Voltage energy storage component carry out energy storage, while the voltage after voltage output end output buck；Energy-storage travelling wave tube starts later
It discharges until its voltage is lower than the conducting voltage of control assembly, silicon-controlled D1 cut-off, voltage output end passes through Current Voltage energy storage
Component electric discharge obtains voltage, while energy-storage travelling wave tube enters energy storage state；Energy-storage travelling wave tube charge and discharge cycles, so that voltage output end is defeated
Oscillating voltage after being depressured out.
By using above-mentioned technical proposal, after energy-storage travelling wave tube receives the voltage of voltage input end, electric energy is first carried out
Storage, charges to energy-storage travelling wave tube；After the voltage of energy-storage travelling wave tube slowly increases the conducting voltage for reaching control assembly, control group
Part conducting, the control electrode of silicon-controlled D1 is powered at this time, and silicon-controlled D1 is switched on, and the cathode of silicon-controlled D1 has the voltage after decompression defeated
Out, meanwhile, Current Voltage energy storage component carries out energy storage；Later due to the electric quantity consumption loaded in control assembly, energy-storage travelling wave tube is opened
Begin to discharge, when the voltage of energy-storage travelling wave tube is lower than the conducting voltage of control assembly, silicon-controlled D1 cut-off, at this time by Current Voltage
The electric energy of energy storage component storage is voltage output end power supply, and simultaneously, energy-storage travelling wave tube starts to carry out the energy storage of a new round again, directly
To the conducting voltage for reaching control assembly again；More than, since energy-storage travelling wave tube can carry out cycle charge-discharge, so that voltage output end
Oscillating voltage is exported, relatively stable voltage after output buck, while biggish electric current can be exported, improve powering load
Stability.
Further, the control assembly includes concatenated zener diode D2 and resistance R1, the control of the silicon-controlled D1
Pole processed is coupled to the tie point of zener diode D2 and resistance R1.
By using above-mentioned technical proposal, when the electric energy of energy-storage travelling wave tube storage reaches the breakdown voltage of zener diode D2
When, the control electrode of silicon-controlled D1 is powered, silicon-controlled D1 conducting；Meanwhile resistance R1 consumes part electric energy, so that energy-storage travelling wave tube is can
It needs to discharge in control silicon D1 turn on process, create conditions for energy-storage travelling wave tube charge and discharge.
Further, the Current Voltage energy storage component includes the electricity for being series at the cathode and voltage output end of silicon-controlled D1
Sense L and one end are coupled to the capacitor C4 of the tie point of the inductance L and voltage output end, other end ground connection.
In view of the deficienciess of the prior art, the second of the utility model is designed to provide a kind of electricity-fetching module, it can
Obtain voltage stable in cable accessory.
To achieve the above object, the utility model provides following technical solution:
A kind of electricity-fetching module, including the switching power circuit as described in the first purpose, further includes:
Capacitance partial pressure unit is set in the electric field inside cable accessory, for acquiring simultaneously output voltage；
Rectification unit is coupled to the capacitance partial pressure unit to receive voltage；
The voltage input end of the switching power circuit is coupled to the rectification unit；
Energy-storage units are coupled to the voltage output end of the switching power circuit；
Regulator control block is coupled to the energy-storage units, for exporting burning voltage.
By using above-mentioned technical proposal, electric energy is obtained using the electric field inside cable accessory, and the electric energy that will acquire is logical
After the rectification of over commutation unit, the decompression of switching power circuit, energy-storage units energy storage, is exported by regulator control block and stablize electricity
Pressure is load supplying.
Further, the voltage capacitor partial pressure unit includes the metal being arranged in cable core and cable accessory shell
Shielding case, cable core form potential in the alternating electric field with metallic shield formation flying capacitor and in cable accessory
Difference forms power supply unit.
Further, the energy-storage units use tantalum capacitor, and the both ends of the tantalum capacitor are respectively coupled to switch power supply
The voltage output end on road and the voltage input end of regulator control block.
By using above-mentioned technical proposal, tantalum capacitor has enough memory capacity and low current leakage.
Further, the regulator control block includes:
LDO chip, input terminal are coupled to energy-storage units, and output end exports burning voltage；
Buck diode A, anode are coupled to the voltage input end of the LDO chip；
Feedback diode B, anode are coupled to the voltage input end of the LDO chip, the yin of cathode and buck diode A
Pole connection；
Voltage checking chip, voltage input end are coupled to the tie point of the buck diode A and feedback diode B,
Output end is coupled to LDO chip.
By using above-mentioned technical proposal, after input voltage reaches setting value, voltage is depressured by buck diode A
Afterwards, voltage reduces, and the output end of voltage checking chip exports high level, and LDO chip opens work, and exports burning voltage；By
It causes input voltage to be slowly lower in consumption electricity, after being lower than setting value, due to the setting of feedback diode B, can continue as
Voltage checking chip power supply a period of time, achievees the purpose that be stabilized the output voltage with this, be unlikely to too low in input voltage
When stop power supply to load at once, improve the stability of output voltage.
In view of the deficienciess of the prior art, the third of the utility model, which is designed to provide one kind, is applied to cable accessory
Temperature measuring equipment, by the way that electricity-fetching module is arranged inside cable accessory, can it is autostable be load supplying.
To achieve the above object, the utility model provides following technical solution:
A kind of temperature measuring equipment applied to cable accessory, including the electricity-fetching module as described in the second purpose, further includes:
MCU, the voltage output end with the electricity-fetching module is to receive burning voltage；
Thermal resistance is electrically connected with the MCU, the temperature for detection cable accessory internal；
Wireless transmitter module is electrically connected with the MCU, for emitting the data of detection temperature.
By using above-mentioned technical proposal, electricity-fetching module is that MCU carries out stable power-supplying, and the temperature data of thermal resistance detection is defeated
Enter after being analyzed in MCU, which is forwarded by wireless transmitter module, staff is aloowed to obtain in real time
Temperature inside cable accessory.
Further, the temperature measuring equipment is integrated on circuit board, and the circuit board is installed in the cable accessory
Portion；The circuit board is conductively connected with cable core, metallic shield.
By using above-mentioned technical proposal, temperature measuring equipment is integrated on circuit board, and circuit board is installed in cable accessory
Portion, and be conductively connected with cable core or metallic shield and obtain stable voltage, realize the real-time of cable accessory internal temperature
Monitoring.
Further, the temperature measuring equipment further includes terminal device, and the terminal device includes and the wireless transmission
The matched wireless receiving module of module, for showing and/or storing the temperature data inside cable accessory.
By using above-mentioned technical proposal, temperature that staff can on the terminal device inside real time inspection cable accessory
Situation is spent, can find the potential faults of cable accessory in time, improves safe operation of electric network stability.
Compared with prior art, the utility model has the advantages that:
1, by switching power circuit, energy-storage travelling wave tube and zener diode D2's is arranged in parallel, can be to the electricity of output
Pressure is depressured, and the stability of powering load is improved；
2, it by the way that metallic shield is arranged between cable core and cable accessory shell, forms flying capacitor and obtains automatically
Electric energy is load supplying；
3, it is provided with Switching Power Supply in electricity-fetching module, can be relatively stablely load supplying, improve the stabilization of load running
Property；
4, by the way that temperature measuring equipment is arranged inside cable accessory, can temperature change inside real-time monitoring cable accessory, work
The potential faults of cable accessory can be found in time by making personnel, improve safe operation of electric network stability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the insulation plug of the cable accessory of the utility model；
Fig. 2 is the schematic block circuit diagram on circuit board；
Fig. 3 is the circuit block diagram of electricity-fetching module；
Fig. 4 is the circuit diagram of capacitance partial pressure unit；
Fig. 5 is the circuit diagram of switching power circuit；
Fig. 6 is the circuit diagram of pressure stabilizing control module；
Fig. 7 is the voltage input end of Switching Power Supply, silicon-controlled D1 control is extreme, voltage output end voltage response.
Appended drawing reference: 1, bolt metal part；2, circuit board；200, electricity-fetching module；201, capacitance partial pressure unit；202, it rectifies
Unit；203, switching power circuit；204, energy-storage units；205, regulator control block；210,MCU；220, thermal resistance；230, nothing
Line transmitting module；240, wireless receiving module；250, terminal device；3, metallic shield；4, insulator cap；5, insulation crust.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
The utility model is directed to flying capacitor and takes in electric process in electric field, generally has the characteristics that voltage is high, electric current is small, directly
Connect by rectification circuit output end output voltage input charging capacitor in when, charging capacitor be easy it is breakdown lead to not to
The phenomenon that load supplying, it is intended to propose a kind of switching power circuit 203, the voltage of output can be depressured, be improved to negative
Carry the stability of power supply；Meanwhile based on above-mentioned switching power circuit 203, a kind of electricity-fetching module 200 is proposed, can be load
Stable voltage is provided；It is also proposed that a kind of temperature measuring equipment applied to cable accessory based on above-mentioned electricity-fetching module 200, it can be direct
Thermometric is carried out to cable accessory inside, measures more true temperature data inside cable accessory, and can be in electricity-fetching module
Cable is observed in real time for staff by electronic display screen displays data after stable output data under 200 power supply function
The temperature variations of accessory internal find the potential faults of cable accessory in time, improve safe operation of electric network stability.
In the present embodiment, modules, unit, component, circuit, element should all have voltage input end and voltage output
End, Uin and Uo only indicate voltage input end and voltage output end rather than specific parameter value.
It referring to Fig.1, is the insulation plug of cable accessory, it is preferred that be the insulation plug of elbow-type cable connector, insulate plug
Be connected to elbow-type cable connector one end, mainly include bolt metal part 1, circuit board 2, metallic shield 3, insulator cap 4 and absolutely
Edge shell 5.Bolt metal part 1 is electrically connected with cable core, and longitudinal section is integrally in convex shape setting, and circular in cross-section is set
It sets, and is provided with external screw thread on the outer peripheral surface of the larger one end of radius.Circuit board 2 is annularly socketed in outside bolt metal part 1, and is led to
It crosses conductive screw to connect with bolt metal part 1, achievees the purpose that fixing circuit board 2 and bolt metal part 1, meanwhile, conductive screw
It is conductively connected with the power input on circuit board 2, is the power supply of circuit board 2 using conductive screw.Bolt metal part 1 is far from spiral shell
One end of spigot position is socketed with insulator cap 4.Metallic shield 3 is located at the lesser one end of 1 diameter of bolt metal part, inside support
It is connected to insulator cap 4, also, filled with insulation flexible glue inside metallic shield 3, convenient for the installation of metallic shield 3.Metal screen
It covers and is laid with semiconductor insulating material layer outside cover 3, can avoid cable partial discharge phenomenon.Insulation crust 5 is poured or is threadedly coupled
Outside bolt metal part 1 and semiconductor insulating material layer, insulation plug is constituted.Shape between metallic shield 3 and bolt metal part 1
At flying capacitor, when elbow-type cable connector is run, alternating electric field, metallic shield 3 and bolt gold are formed inside insulation plug
Belong to part 1 and form potential difference, can power for circuit board 2.Rubber can be used in insulator cap 4, and epoxide resin material can be used in insulation crust 5
It is made.
Referring to Fig. 2, it is provided with temperature measuring equipment on circuit board 2, temperature measuring equipment includes electricity-fetching module 200, MCU210, thermal resistance
220 and wireless transmitter module 230.Electricity-fetching module 200 is connect with the power input of MCU210, is powered for MCU210；Thermal resistance
220 are electrically connected with MCU210, can measure the temperature inside cable accessory, and export corresponding data into MCU210；Wireless hair
It penetrates module 230 to connect with MCU210 signal, the data that thermal resistance 220 measures can be transferred out.It is corresponding, cable accessory peripheral hardware
It is equipped with terminal device 250, wireless transmitter module 230 compatible with wireless transmitter module 230 is provided on terminal device 250.
The equipment having a display function such as smart phone, tablet computer, desktop computer, laptop can be selected in terminal device 250,
Temperature data inside cable accessory can be carried out being displayed and stored in the included memory of equipment, it is real-time convenient for staff
Observe the temperature conditions inside cable accessory.
Wherein, referring to Fig. 3, electricity-fetching module 200 includes sequentially connected capacitance partial pressure unit 201, rectification unit 202, opens
Powered-down source circuit 203, energy-storage units 204 and regulator control block 205.Capacitance partial pressure unit 201 is from the electric field of cable accessory
Electric energy is obtained, and direct current is become by the rectified action of rectification unit 202, after being depressured using switching power circuit 203,
Electric energy is stored in energy-storage units 204, is load supplying by pressure stabilizing control module 205, load may include above-mentioned
MCU210。
Referring to Fig. 4, capacitance partial pressure unit 201 is mainly formed by metallic shield 3, metallic shield 3 and cable core/spiral shell
Bolt metalwork 1 forms flying capacitor C1, and metallic shield 3 and earth cable attachment shell form flying capacitor C2, when the metal
When shielding case 3 is in the alternating electric field inside cable accessory, flying capacitor C1 and flying capacitor C2 form potential difference, the two it
Between divide mutually, be load supplying.Rectification unit 202 uses rectifier bridge, is electrically connected with the both ends of flying capacitor C1, by the electricity that suspends
Hold the electric signal that C1 is obtained to be rectified, to obtain relatively stable electric signal.
Referring to Fig. 5, switching power circuit 203 has voltage input end Uin and voltage output end Uo, voltage input end Uin
It is connect with the voltage output end of rectifier bridge, including energy-storage travelling wave tube, control assembly, silicon-controlled D1 and Current Voltage energy storage component.Storage
Energy element includes capacitor C3, and one end is coupled to voltage input end Uin, and the voltage that can be inputted to voltage input end store.
Control assembly includes concatenated zener diode D2 and resistance R1, and the control electrode of silicon-controlled D1 is coupled to zener diode D2 and electricity
Hinder the tie point of R1；The anode of silicon-controlled D1 is coupled to voltage input end Uin, and cathode is coupled to Current Voltage energy storage component.Electricity
Galvanic electricity pressure energy storage component includes being series at the cathode of silicon-controlled D1 and the inductance L of voltage output end Uo and one end is coupled to electricity
Feel the tie point of L and voltage output end Uo, the capacitor C4 of other end ground connection.
After capacitor C3 receives the voltage of voltage input end Uin, the storage of electric energy is first carried out, capacitor C3 is filled
Electricity.After the voltage at the both ends capacitor C3 slowly increases, since control assembly is in parallel with the both ends capacitor C3, when the voltage at the both ends capacitor C3
When reaching the breakdown voltage of zener diode D2, zener diode D2 is switched on, and the control electrode of silicon-controlled D1 is powered at this time, controllably
Silicon D1 is switched on, and the cathode of silicon-controlled D1 has voltage output, while Current Voltage energy storage component starts storage；Due to resistance R1's
The voltage of power consumption, the both ends capacitor C3 gradually decreases, zener diode D2 cut-off, at this time silicon-controlled D1 cut-off, Current Voltage
Energy storage component electric discharge is that voltage output end is powered, and capacitor C3 enters the charging energy-storing state of a new round, until reaching steady again
Press the breakdown voltage of diode D2.The circulating charge and discharge of capacitor C3 can make the cathode of silicon-controlled D1 export oscillating voltage.Reference
Fig. 7 is that voltage input end, the silicon-controlled D1 of Switching Power Supply control extreme, voltage output end voltage response, voltage output
The output voltage at end gradually tends towards stability over time, and the charging derived from capacitor C4 is greater than electric discharge.
In the present embodiment, energy-storage units 204 use tantalum capacitor, and the both ends of tantalum capacitor are respectively coupled to switching power circuit
The 203 voltage output end Uo and voltage input end Uin of regulator control block 205.Tantalum capacitor has enough memory capacity and low
Leakage current can carry out the storage of larger capacity to the electric energy exported from switching power circuit 203.
Referring to Fig. 6, regulator control block 205 includes LDO chip, buck diode A and feedback diode B and voltage detecting
Chip.The voltage input end of LDO chip is coupled to tantalum capacitor one end, and output end exports burning voltage；The anode of buck diode A
It is coupled to the voltage input end of LDO chip；The anode of feedback diode B is coupled to the voltage input end of LDO chip, cathode and drop
Press the cathode connection of diode A；The voltage input end of voltage checking chip is coupled to buck diode A's and feedback diode B
Tie point, output end are coupled to LDO chip.Buck diode A in this implementation uses light emitting diode.
When the input voltage of regulator control block 205 reaches setting value, voltage is after buck diode A decompression, voltage
It reduces, the output end of voltage checking chip exports high level, and LDO chip opens work, and exports burning voltage；Due to consumption electricity
Amount causes input voltage to be slowly lower, and after being lower than setting value, due to the setting of feedback diode B, can continue as voltage detecting
Chip power supply a period of time, achievees the purpose that be stabilized the output voltage with this, be unlikely to stop at once when input voltage is too low
Only to the power supply of load, the stability of output voltage is improved.
In another embodiment, buck diode A can connect multiple, to improve the input voltage of regulator control block 205,
To improve the storing electricity of tantalum capacitor, big voltage back diffirence control is realized.
The working principle of the present embodiment:
Suspension electricity that is internal to generate alternating electric field when cable accessory is run, being formed by metallic shield 3 and cable core
Holding C1 to form potential difference is the load supplying on circuit board 2.It is provided with thermal resistance 220 on circuit board 2, it is attached can directly to measure cable
Temperature inside part, staff can have found the potential faults of cable accessory in time, improve safe operation of electric network stability.
The voltage at the both ends flying capacitor C1 in input switch power circuit 203, passes through after the rectified action of rectifier bridge
Capacitor C3 stores electric energy, charges to capacitor C3.The voltage of capacitor C3 slowly increases the breakdown potential for reaching zener diode D2
After pressure, zener diode D2 is switched on, and the control electrode of silicon-controlled D1 is powered at this time, and silicon-controlled D1 is switched on, the yin of silicon-controlled D1
There is voltage output in pole, while inductance L and capacitor C4 charge；Later, due to the power consumption of resistance R1, capacitor C3 starts to put
Electricity, when the voltage until the both ends capacitor C3 is lower than the breakdown voltage of zener diode D2, zener diode D2 cut-off, at this time controllably
Silicon D1 cut-off, capacitor C4 electric discharge provide output voltage for voltage output end, and capacitor C3 enters the charged state of a new round；Capacitor C3
Cycle charge-discharge so that the cathode of silicon-controlled D1 exports relatively stable oscillating voltage.
The voltage that switching power circuit 203 exports first passes through tantalum capacitor, and tantalum capacitor first charges, and voltage directly inputs surely
It presses in control unit 205, after buck diode A decompression, voltage reduces voltage, and the output end of voltage checking chip exports high
Level, LDO chip opens work, and exports burning voltage；Since consumption electricity causes input voltage to be slowly lower, set when being lower than
After definite value, due to the setting of feedback diode B, voltage checking chip power supply a period of time can be continued as, it is steady to reach acquisition with this
The purpose for determining output voltage is unlikely to stop the power supply to load at once when input voltage is too low, improves the steady of output voltage
It is qualitative.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of switching power circuit, with voltage input end and voltage output end characterized by comprising
Energy-storage travelling wave tube is coupled to the voltage input end, for storing the electric energy obtained from voltage input end；
Control assembly is parallel to the energy-storage travelling wave tube, for controlling the control control electrode power on/off of silicon-controlled D1；
Silicon-controlled D1, control electrode are coupled to the control assembly, and anode is coupled to voltage input end；
Current Voltage energy storage component is coupled to the cathode and voltage output end of the silicon-controlled D1, for caching output voltage
And electric current；
When the conducting voltage of the power storage of energy-storage travelling wave tube to control assembly, control assembly is connected and controls silicon-controlled D1 and leads
Logical, Current Voltage energy storage component carries out energy storage, while the voltage after voltage output end output buck；Energy-storage travelling wave tube starts to put later
Electricity is lower than the conducting voltage of control assembly, silicon-controlled D1 cut-off until its voltage, and voltage output end passes through Current Voltage energy storage group
Part electric discharge obtains voltage, while energy-storage travelling wave tube enters energy storage state；Energy-storage travelling wave tube charge and discharge cycles, so that voltage output end exports
Oscillating voltage after decompression.
2. switching power circuit according to claim 1, which is characterized in that the control assembly includes concatenated pressure stabilizing two
The control electrode of pole pipe D2 and resistance R1, the silicon-controlled D1 are coupled to the tie point of zener diode D2 and resistance R1.
3. switching power circuit according to claim 1, which is characterized in that the Current Voltage energy storage component includes series connection
The connection of the inductance L and voltage output end are coupled in the cathode of silicon-controlled D1 and the inductance L of voltage output end and one end
The capacitor C4 that point, the other end are grounded.
4. a kind of electricity-fetching module, which is characterized in that including the switching power circuit as described in any one in claim 1-3
(203), further includes:
Capacitance partial pressure unit (201), is set in the electric field inside cable accessory, for acquiring simultaneously output voltage；
Rectification unit (202) is coupled to the capacitance partial pressure unit (201) to receive voltage；
The voltage input end of the switching power circuit (203) is coupled to the rectification unit (202)；
Energy-storage units (204), are coupled to the voltage output end of the switching power circuit (203)；
Regulator control block (205) is coupled to the energy-storage units (204), for exporting burning voltage.
5. electricity-fetching module according to claim 4, which is characterized in that the capacitance partial pressure unit (201) includes that setting exists
Metallic shield (3) in cable core and cable accessory shell, cable core and the metallic shield (3) form the electricity that suspends
Hold and form potential difference in the alternating electric field in cable accessory, forms power supply unit.
6. electricity-fetching module according to claim 4, which is characterized in that the energy-storage units (204) use tantalum capacitor, described
The both ends of tantalum capacitor are respectively coupled to the voltage output end of switching power circuit (203) and the voltage of regulator control block (205)
Input terminal.
7. electricity-fetching module according to claim 4, which is characterized in that the regulator control block includes:
LDO chip, input terminal are coupled to energy-storage units (204), and output end exports burning voltage；
Buck diode A, anode are coupled to the voltage input end of the LDO chip；
Feedback diode B, anode are coupled to the voltage input end of the LDO chip, the cathode company of cathode and buck diode A
It connects；
Voltage checking chip, voltage input end are coupled to the tie point of the buck diode A and feedback diode B, output
End is coupled to LDO chip.
8. a kind of temperature measuring equipment applied to cable accessory, which is characterized in that including electricity-fetching module as claimed in claim 5
(200), further includes:
MCU (210), the voltage output end with the electricity-fetching module (200) is to receive burning voltage；
Thermal resistance (220) is electrically connected, the temperature for detection cable accessory internal with the MCU (210)；
Wireless transmitter module (230) is electrically connected with the MCU (210), for emitting the data of detection temperature.
9. the temperature measuring equipment according to claim 8 applied to cable accessory, which is characterized in that the temperature measuring equipment is integrated
In on circuit board (2), and the circuit board (2) is installed on inside the cable accessory；The circuit board (2) and cable core,
Metallic shield (3) is conductively connected.
10. the temperature measuring equipment according to claim 8 applied to cable accessory, which is characterized in that the temperature measuring equipment is also
Including terminal device (250), the terminal device (250) includes and the wireless transmitter module (230) is matched wirelessly connects
It receives module (240), for showing and/or storing the temperature data inside cable accessory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821326172.8U CN208820547U (en) | 2018-08-16 | 2018-08-16 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821326172.8U CN208820547U (en) | 2018-08-16 | 2018-08-16 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208820547U true CN208820547U (en) | 2019-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821326172.8U Active CN208820547U (en) | 2018-08-16 | 2018-08-16 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
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| Country | Link |
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| CN (1) | CN208820547U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038865A (en) * | 2018-08-16 | 2018-12-18 | 四川瑞霆电力科技有限公司 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
| CN110460232A (en) * | 2019-07-03 | 2019-11-15 | 西北核技术研究院 | A kind of DC power supply with isolation module |
-
2018
- 2018-08-16 CN CN201821326172.8U patent/CN208820547U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038865A (en) * | 2018-08-16 | 2018-12-18 | 四川瑞霆电力科技有限公司 | Temperature measuring equipment and its electricity-fetching module, switching power circuit applied to cable accessory |
| CN109038865B (en) * | 2018-08-16 | 2024-01-30 | 四川瑞霆智汇科技有限公司 | Temperature measuring device applied to cable accessory, power taking module thereof and switching power supply circuit |
| CN110460232A (en) * | 2019-07-03 | 2019-11-15 | 西北核技术研究院 | A kind of DC power supply with isolation module |
| CN110460232B (en) * | 2019-07-03 | 2020-06-26 | 西北核技术研究院 | Direct current power supply with isolation module |
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