CN203014502U - A high-voltage-side inductive electricity acquiring device - Google Patents
A high-voltage-side inductive electricity acquiring device Download PDFInfo
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- CN203014502U CN203014502U CN2013200180005U CN201320018000U CN203014502U CN 203014502 U CN203014502 U CN 203014502U CN 2013200180005 U CN2013200180005 U CN 2013200180005U CN 201320018000 U CN201320018000 U CN 201320018000U CN 203014502 U CN203014502 U CN 203014502U
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Abstract
The utility model relates to an electricity acquiring device and provides a stable and reliable high-voltage-side inductive electricity acquiring device used for acquiring electricity from the bus of a high voltage side. The high-voltage-side inductive electricity acquiring device is equipped with a CT coil, a front impact protecting circuit, a rectifying circuit, a filtering circuit, a voltage protection energy discharging circuit, and a DC power converting circuit. The CT coil is sleeved on the bus of the external high voltage side. The output end of the CT coil is connected with the input end of the front impact protecting circuit and the input end of the rectifying circuit in parallel. The output end of the rectifying circuit is connected with the input end of the filtering circuit. The output end of the filtering circuit is connected with the input end of the voltage protection energy discharging circuit. The output end of the voltage protection energy discharging circuit is connected with the input end of the DC power converting circuit. The output end of the DC power converting circuit is connected with an external electricity using circuit. The high-voltage-side inductive electricity acquiring device with stable and reliable performance satisfies a safety requirement of electric isolation and effectively resolves a power problem of an active electronic device at the high voltage side.
Description
Technical field
The utility model relates to a kind of electricity getting device, relates to especially that a kind of directly bus obtains the high-pressure side induction electricity getting device of electric energy from the high-pressure side.
Background technology
Supply power mode commonly used has the modes such as solar energy, laser energy, bus induction energy fetching at present, as:
1, adopt solar panel,, just need safeguard or change due to solar panel after long-term work a period of time, transmission line just needs to have a power failure; And temperature influence is larger, and because the absorption coefficient of light is relevant with temperature, the variation of ambient temperature has larger impact to photronic responsiveness and dark current, so this kind method is unreliable.
2, carry out laser powered sensor by optical fiber, major defect is that present domestic photoelectric technology is not also very ripe, and the cost of foreign procurement photoelectric device is higher again, and lower its power that can provide of photoelectric device of cost is limited.Particularly for power laser generator, the working life of its laser diode is limited, if work long hours the larger state of drive current, degradation phenomena etc. easily occurs and causes working life to reduce rapidly in laser diode; And because generating laser, optical fiber, optical-electrical converter are easily aging, very easily affect power supply quality.
3, utilize the electric current of high voltage transmission line to respond to power taking, this supply power mode is to utilize electromagnetic induction principle, obtains the alternating current electric energy by common ferromagnetic formula instrument transformer from the high voltage bus induction, is then the high-pressure side circuit supply after over commutation, filtering, voltage stabilizing.This coil is in high-pressure side, and insulating requirements is low, can greatly simplify its design.Power system load alters a great deal, and bus current alters a great deal (several amperes of supreme kiloamperes) thereupon, but busbar short-circuit transient current more than ten times rated current.The work that large working range like this is power transformer and voltage stabilizing circuit brings exceptional hardship.Therefore, the aspect that has two needs to consider during design: the one, how to reduce the dead band electric current, guaranteeing hour can provide at the electric power system electric current is enough to drive the power that is in the high-pressure side electronic circuit; The 2nd, when Short-Circuit High Current appears in system, how to provide a stable power supply to electronic circuit, can not damage because of overvoltage again.
Summary of the invention
The purpose of this utility model is to provide a kind of for power taking from high-voltage side bus, reliable and stable high-pressure side induction electricity getting device.
The utility model is provided with CT coil, front end impact protection circuit, rectification circuit, filter circuit, voltage protection energy leadage circuit and DC power supply translation circuit;
On CT coil cover high-voltage side bus externally; the CT coil output also connects front end impact protection circuit input and rectification circuit input end; rectification circuit output end connects the filter circuit input; filter circuit output termination voltage protection energy leadage circuit input; voltage protection energy leadage circuit output termination DC power supply translation circuit input, the outside power circuit of DC power supply translation circuit output termination.
Described front end impact protection circuit preferably adopts the buffer circuit of transition twin zener dioder and capacitor combination.
Described rectification circuit preferably adopts bridge rectifier.
Described filter circuit preferably adopts the compound filter circuit of LC-π type.
The core material of described CT coil can be selected silicon steel material, and coil turn is 500 circles.
Be provided with voltage stabilizing didoe and large power triode in described voltage protection energy leadage circuit.
Be provided with pressurizer in described DC power supply translation circuit, it is the pressurizer of 78L05 that pressurizer can adopt model.
Compared with the prior art, the beneficial effects of the utility model are as follows:
After the CT coil induces AC energy from high-voltage side bus, alternating current is passed through rectification circuit, filter circuit, power converting circuit to satisfy the required energy of subsequent conditioning circuit.Wherein rectification circuit changes alternating current into the direct voltage of pulsation; Filter circuit changes the direct voltage of pulsation into level and smooth direct voltage; Power converting circuit can be the dc voltage stability of output on desirable numerical value.The utility model is through operation examination on site, and is stable and reliable for performance, satisfies the safety requirements of electrical isolation.Thereby can effectively solve the power issue of high-pressure side active electronic equipment.
Description of drawings
Fig. 1 is the theory diagram of the utility model embodiment.
Fig. 2 is the circuit theory diagrams of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1 and 2, the utility model embodiment is provided with CT coil T, front end impact protection circuit 1, rectification circuit 2, filter circuit 3, voltage protection energy leadage circuit 4 and DC power supply translation circuit 5.On CT coil T cover high-voltage side bus P externally; CT coil T output also connects front end impact protection circuit 1 input and rectification circuit 2 inputs; rectification circuit 2 output termination filter circuit 3 inputs; filter circuit 3 output termination voltage protection energy leadage circuit 4 inputs; voltage protection energy leadage circuit 4 output termination DC power supply translation circuit 5 inputs, the DC power supply translation circuit 5 outside power circuits of output termination.Described front end impact protection circuit 1 adopts the buffer circuit of transition twin zener dioder TVS1 and capacitor C 1 combination.Described rectification circuit 2 adopts bridge rectifier.Described filter circuit 3 adopts the compound filter circuit of LC-π type.The core material of described CT coil is selected silicon steel material, and coil turn is 500 circles.Described voltage protection energy leadage circuit 4 adopts voltage stabilizing didoe D1 and large power triode Q1.It is the pressurizer of 78L05 that pressurizer in described DC power supply translation circuit 5 adopts model.
The utility model operation principle is described as follows: supply power mode is to utilize electromagnetic induction principle, obtains AC energy by common ferromagnetic formula instrument transformer from the high voltage bus induction, is then the high-pressure side circuit supply after over commutation, filtering, voltage stabilizing.The energy of its power supply is from the high voltage bus electric current, and getting can be to complete by a magnetic induction coil that is enclosed within on bus, has magnetic field around the bus ring, obtains energy by magnetic field.The CT group obtains electric energy from bus, and the CT group has a plurality of secondary side output windings.The induced voltage that obtains is by rectification, filtering, voltage stabilizing, after the subsequent conditioning circuits such as DC-DC conversion are processed, supplies with electronic current mutual inductor high-pressure side electronic circuit.When bus current can satisfy getting of subsequent conditioning circuit can require the time, the power supply of high-pressure side circuit by get can the CT secondary side the induced voltage conversion obtain.(fault current can surpass more than ten times of rated current), must have corresponding measure that subsequent conditioning circuit is protected, otherwise electronic circuit will burn when bus current is short-circuited.This problem is by adopting transition twin zener dioder TVS1 to solve, and when the output voltage amplitude of CT rose to certain value, transition twin zener dioder TVS1 conducting was clamped down on it to the output voltage of CT below a certain numerical value simultaneously, can effectively protect subsequent conditioning circuit.The voltage transformation first step is to become direct voltage to the output voltage of CT secondary side winding by alternating voltage.Here take the full-wave rectification bridge circuit.Circuit to this part has two to the requirement of diode: enough withstand voltages be arranged and less forward conduction voltage drop will be arranged.Determine to adopt Schottky diode through relatively screening.A kind of novel low-power consumption, large electric current, ultra-speed semiconductor device.Its reverse recovery time extremely short (may diminish to several nanoseconds), forward conduction voltage drop is the 0.4V left and right only, and rectified current can reach several kiloamperes.Due to rectified current and little, higher to commutating voltage by contrast, so select the higher model of compressive resistance to get final product.Alternating current can be changed into Rectified alternating current after rectification circuit, wherein contain larger alternating current component, can use pure direct current in order to make equipment, also must use the alternating component in filter circuit filtering pulsating voltage.By relatively, adopt compound filter circuit-LC-π type filter circuit in this design, add upper level LC filtering on the basis of capacitor C filtering, less when only having LC filtering than the ripple factor ratio of the better output voltage of lc circuit filter effect, waveform is more level and smooth; Owing to having accessed electric capacity at input, thereby when only having LC filtering, improved output voltage.Because the excursion of bus current is large, induced voltage will obtain the direct voltage of wide region after over commutation, filtering, need to obtain a stable 5V voltage by the DC decompression conversion of an input on a large scale, single stable output, to satisfy high-pressure side circuit needs.Adopt the 78L05 pressurizer, its input voltage range is 7V～30V, is output as+the 5V direct voltage.
The utility model is provided with protective circuit:
(1) superpotential protection: transient state (transition) voltage suppresses diode (TVS) device; under the applied in reverse condition of regulation; when bearing a high-octane instantaneous overvoltage pulse; its working impedance can be down to very low conduction value immediately; allow large electric current to pass through; and voltage clamping is arrived predeterminated level, thereby effectively protect the precision components in electronic circuit to avoid damaging.Its positive and negative both direction of the instantaneous arteries and veins that TVS can bear all has identical avalanche breakdown characteristic and clamp characteristic.Utilize this function, can suppress the frequent abnormal overvoltage that occurs in circuit, protective circuit is avoided superpotential infringement.
(2) after rectifying and wave-filtering, voltage is along with bus current raises and raises, and after iron core was saturated, the voltage that induces was also higher, and the palpus over-voltage is so that the DC-DC module is avoided damage.When voltage was higher, voltage stabilizing didoe D1 punctured, and rated current is the large power triode work of 10A, and excess energy is released; When voltage was low, D1 can be not breakdown, therefore can not affect the normal operation of power supply under starting current or little electric current.
(3) in circuit, the resistance of current limliting divider resistance R can have influence on voltage distribution in low-voltage circuit, thus need to discuss to its setting value, and verification experimental verification in addition.
(4) protection of pressurizer: in order to reduce output ripple voltage, sometimes need to be at output jumbo electrolytic capacitor C4 in parallel.Yet produce a disadvantage, in case when short circuit appears in input, the electric charge of storing on large capacitor on output will be released by emitter and the base stage PN junction of pressurizer internal circuit adjustment pipe so thereupon.Because the energy release of electric capacity is larger, probably cause the damage of surge pipe.In order to prevent the generation of this situation, can one of cross-over connection protect diode D2 between the input and output terminal, it provides a shunt for upper the releasing of electric charge of C4, and pressurizer is played a protective role.
Power supply prototyping testing result when the CT coil is 500 circle is as shown in table 1.
Table 1
| Bus current/A | DC-DC module output voltage/V |
| 420 | 4.62 |
| 470 | 4.73 |
| 535 | 4.80 |
| 635 | 4.90 |
| 710 | 4.95 |
| 810 | 4.98 |
Field test shows, the utility model embodiment stability of powering is reliable, effectively solved the power issue of high-pressure side active electronic equipment.
Claims (7)
1. high-pressure side induction electricity getting device, is characterized in that, is provided with CT coil, front end impact protection circuit, rectification circuit, filter circuit, voltage protection energy leadage circuit and DC power supply translation circuit;
On CT coil cover high-voltage side bus externally; the CT coil output also connects front end impact protection circuit input and rectification circuit input end; rectification circuit output end connects the filter circuit input; filter circuit output termination voltage protection energy leadage circuit input; voltage protection energy leadage circuit output termination DC power supply translation circuit input, the outside power circuit of DC power supply translation circuit output termination.
2. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, described front end impact protection circuit adopts the buffer circuit of transition twin zener dioder and capacitor combination.
3. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, described rectification circuit adopts bridge rectifier.
4. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, described filter circuit adopts the compound filter circuit of LC-π type.
5. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, the number of turn of described CT coil is 500 circles.
6. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, is provided with voltage stabilizing didoe and triode in described voltage protection energy leadage circuit.
7. induction electricity getting device in high-pressure side as claimed in claim 1, is characterized in that, be provided with pressurizer in described DC power supply translation circuit, it is the pressurizer of 78L05 that pressurizer adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200180005U CN203014502U (en) | 2013-01-14 | 2013-01-14 | A high-voltage-side inductive electricity acquiring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200180005U CN203014502U (en) | 2013-01-14 | 2013-01-14 | A high-voltage-side inductive electricity acquiring device |
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| CN203014502U true CN203014502U (en) | 2013-06-19 |
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| CN2013200180005U Expired - Fee Related CN203014502U (en) | 2013-01-14 | 2013-01-14 | A high-voltage-side inductive electricity acquiring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675407A (en) * | 2013-12-03 | 2014-03-26 | 浙江华采科技有限公司 | Strut-type current collection device for power transmission lines |
| CN103675431A (en) * | 2013-12-03 | 2014-03-26 | 浙江华采科技有限公司 | Current collecting device on power transmission line |
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN104079163A (en) * | 2014-06-27 | 2014-10-01 | 西安微纳传感器研究所有限公司 | Anti-jamming circuit |
| CN106911192A (en) * | 2017-04-15 | 2017-06-30 | 三峡大学 | A kind of high voltage induction electricity getting device of doubleway output |
| CN107072015A (en) * | 2017-06-07 | 2017-08-18 | 刘胜泉 | A kind of multichannel sensing intelligent controller for road lamp |
| CN117411324A (en) * | 2023-12-15 | 2024-01-16 | 国网福建省电力有限公司 | Power transformer integrated calibrating device power supply and control method thereof |
-
2013
- 2013-01-14 CN CN2013200180005U patent/CN203014502U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN103675407A (en) * | 2013-12-03 | 2014-03-26 | 浙江华采科技有限公司 | Strut-type current collection device for power transmission lines |
| CN103675431A (en) * | 2013-12-03 | 2014-03-26 | 浙江华采科技有限公司 | Current collecting device on power transmission line |
| CN104079163A (en) * | 2014-06-27 | 2014-10-01 | 西安微纳传感器研究所有限公司 | Anti-jamming circuit |
| CN106911192A (en) * | 2017-04-15 | 2017-06-30 | 三峡大学 | A kind of high voltage induction electricity getting device of doubleway output |
| CN107072015A (en) * | 2017-06-07 | 2017-08-18 | 刘胜泉 | A kind of multichannel sensing intelligent controller for road lamp |
| CN117411324A (en) * | 2023-12-15 | 2024-01-16 | 国网福建省电力有限公司 | Power transformer integrated calibrating device power supply and control method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20180114 |