CN106959407A - It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit - Google Patents
It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit Download PDFInfo
- Publication number
- CN106959407A CN106959407A CN201710176244.9A CN201710176244A CN106959407A CN 106959407 A CN106959407 A CN 106959407A CN 201710176244 A CN201710176244 A CN 201710176244A CN 106959407 A CN106959407 A CN 106959407A
- Authority
- CN
- China
- Prior art keywords
- tvs diode
- module
- pressure
- tvs
- filter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H5/00—One-port networks comprising only passive electrical elements as network components
- H03H5/12—One-port networks comprising only passive electrical elements as network components with at least one voltage- or current-dependent element
Abstract
It is more particularly to a kind of to improve TVS diode insulation and pressure-resistant filter circuit the invention belongs to TVS diode technical field of filtering.Including TVS diode module, capacitance module, protected circuit and protecting field PE, coupling between protected circuit and protecting field PE has TVS diode module and capacitance module, and TVS diode module is connected with capacitance module.The present invention is not only able to absorb the peaking voltage of big energy, does not produce distortion, but also can improve insulation resistance value and pressure voltage of the protected circuit to protecting field, it is ensured that filter circuit passes through insulation and voltage-withstand test.
Description
Technical field
The invention belongs to TVS diode technical field of filtering, more particularly to a kind of raising TVS diode insulate and pressure-resistant
Filter circuit.
Background technology
To avoid electronic product from occurring safe condition in the course of the work, it is necessary to by insulation and voltage-withstand test, such as safety
Test etc..Apply appropriate voltage between the live part and protecting field PE of test request product, keep nothing in a period of time to hit
Arcing phenomena is worn, the usual voltage is not less than 500V.Meanwhile, in the circuit of live part, usually due to electrostatic, electromagnetic interference and
Impacted by high voltage transient spike, to eliminate the peaking voltage in circuit, it will usually increase TVS bis- in circuit
Pole pipe, when the peaking voltage in circuit exceedes the clamp voltage of TVS diode, TVS diode fast conducting absorbs wink
When heavy current pulse, by its both end voltage clamper TVS diode clamp voltage so that protect late-class circuit safety.However,
In the peaking voltage in using TVS diode absorption circuit, protected circuit is the poles of TVS bis- to the pressure-resistant of protecting field PE
The conduction voltage drop of pipe, it is impossible to pass through insulation and voltage-withstand test.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of filter circuit of TVS diode, not only can
The peaking voltage of big energy is enough absorbed, distortion is not produced, but also insulation of the protected circuit to protecting field can be improved
Resistance and pressure voltage, it is ensured that filter circuit passes through insulation and voltage-withstand test.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：One kind improves TVS diode
Insulation and pressure-resistant filter circuit, including TVS diode module, capacitance module, protected circuit and protecting field PE, are protected
Coupling between circuit and protecting field PE has TVS diode module and capacitance module, and TVS diode module and capacitance module string
Connection.
A kind of above-mentioned TVS diode that improves insulate and pressure-resistant filter circuit, multiple when the protected circuit is multiple
Protected circuit can share a capacitance module, i.e., each protected circuit couples a TVS diode module respectively, then simultaneously
The same capacitance module of row access.
It is above-mentioned it is a kind of improve TVS diode insulation and pressure-resistant filter circuit, the capacitance module by single electric capacity, or
It is made up of multiple capacitances in series or parallel connection.
A kind of above-mentioned TVS diode that improves insulate and pressure-resistant filter circuit, and the TVS diode module is by single TVS
Diode, or be in series or in parallel to form by multiple TVS diodes.
A kind of above-mentioned TVS diode that improves insulate and pressure-resistant filter circuit, and the TVS diode is the unidirectional poles of TVS bis-
Pipe or two-way TVS diode.
Compared with prior art, the beneficial effects of the present invention are：The present invention uses TVS diode module and capacitance module
Series connection, can greatly improve the insulation resistance value and pressure voltage of TVS diode filter circuit, can pass through insulation and pressure-resistant survey
Examination；And the circuit, when signal frequency is higher, be able to will not be also filtered out with absorbing peak pulse voltage by protection signal,
Wave distortion will not be produced.In addition, TVS diode module can be according to clamp voltage and spike current sink capability, certainly
By the number and connected mode of selection TVS diode, capacitance module can be according to insulation resistance value and pressure voltage, unrestricted choice electric capacity
Number and connected mode, flexibility is high, strong applicability.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Fig. 2 is the circuit theory diagrams of multiple protected circuits of the invention.
Fig. 3 is the electrical block diagram that TVS diode module of the present invention is single TVS diode.
Fig. 4 is that TVS diode module of the present invention is the electrical block diagram that multiple TVS diodes are connected.
Fig. 5 is that TVS diode module of the present invention is multiple TVS diodes electrical block diagram in parallel.
Fig. 6 is the electrical block diagram that capacitance module of the present invention is single electric capacity.
Fig. 7 is the electrical block diagram that capacitance module of the present invention is multiple capacitances in series.
Fig. 8 is that capacitance module of the present invention is multiple electric capacity electrical block diagram in parallel.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of insulation of raising TVS diode and the pressure-resistant filter circuit of the present invention, by protected circuit,
TVS diode module, capacitance module and protecting field PE compositions, coupling between protected circuit and protecting field PE has the poles of TVS bis-
Tube module and capacitance module, and TVS diode module connects with capacitance module.
The selecting method of TVS diode module and capacitance module is as follows：
Step 101, determine whether multichannel protected circuit needs to share a capacitance module.If so, then circuit of the present invention such as Fig. 2
It is shown, after protected circuit 1 to protected circuit n couples one by one with TVS diode module 1 to TVS diode module n respectively,
Common access capacitance module；If need not share, the circuit is as shown in Figure 1；
Step 102, the selection of TVS diode module is, it is necessary to according to the transient absorption energy and clamp voltage of TVS diode module
Selected.Wherein, transient absorption energy is determined by the momentary spike voltage energy scope of protected circuit needs absorption, is clamped
Position voltage is determined by the work maximum voltage of protected circuit.Selected TVS diode module has three kinds of modes, the first
It is made up of single TVS diode, as shown in Figure 3；Second is composed in series by n TVS diode, as indicated at 4, Ci Zhongfang
Formula can improve the clamp voltage of TVS diode module, and its clamp voltage is n TVS diode anteposition voltage sum；The third
Mode is composed in parallel by n TVS diode, as figure 5 illustrates, and such a mode can improve TVS diode module transient absorption energy
Amount；
Step 103, capacitance module selection according to the pressure-resistant and capacitance of capacitance module, it is necessary to be selected.Wherein, capacitance module
Pressure-resistant is that, according to safety or system requirements, selection is more than or equal to desired pressure voltage；Capacitance then by peaking voltage frequently
Rate is determined with leakage current.Selected capacitance module has three kinds of modes, and the first is made up of single electric capacity, as shown in fig. 6,
Its is pressure-resistant and capacitance be the single electric capacity pressure-resistant and capacitance；It is made up of n capacitances in series for second, as shown in fig. 7, this
The mode of kind can improve the pressure voltage of capacitance module, and its pressure voltage is n electric capacity pressure voltage sum；The third mode is n electric capacity
Compose in parallel, as shown in figure 8, such a mode can improve the capacitance of capacitance module, its capacitance is n capacitor's capacity sum.
The present invention is by the way of TVS diode module is connected with capacitance module, when not having peaking voltage, TVS
Diode (led) module is not turned on, and capacitance module does not work；Peaking voltage comes interim, and peaking voltage punctures the poles of TVS bis-
Tube module, is released by capacitance module.Not only can effectively absorbing peak pulse voltage, and when signal frequency is higher,
It will not be also filtered out by protection signal, it is to avoid distortion phenomenon.At the same time it can also greatly improve TVS diode filter circuit
Insulation resistance value and pressure voltage, it is ensured that pass through insulation and voltage-withstand test.
Although the present invention is described in detail above, the invention is not restricted to this, those skilled in the art can be with
Various modifications are carried out according to the principle of the present invention.Therefore, all modifications made according to the principle of the invention, all should be understood to fall into
Protection scope of the present invention.
Claims (7)
1. a kind of improve TVS diode insulation and pressure-resistant filter circuit, it is characterised in that including TVS diode module, electric capacity
Module, protected circuit and protecting field PE, coupling between protected circuit and protecting field PE has TVS diode module and electric capacity
Module, and TVS diode module connects with capacitance module.
2. a kind of TVS diode that improves according to claim 1 insulate and pressure-resistant filter circuit, it is characterised in that institute
State protected circuit for it is multiple when, multiple protected circuits can share a capacitance module, i.e., each protected circuit joins respectively
A TVS diode module is connect, same capacitance module is then accessed parallel.
3. a kind of TVS diode that improves according to claim 1 or 2 insulate and pressure-resistant filter circuit, it is characterised in that
The capacitance module is constituted by single electric capacity, or by multiple capacitances in series or parallel connection.
4. a kind of TVS diode that improves according to claim 1 or 2 insulate and pressure-resistant filter circuit, it is characterised in that
The TVS diode module is in series or in parallel to form by single TVS diode, or by multiple TVS diodes.
5. a kind of TVS diode that improves according to claim 4 insulate and pressure-resistant filter circuit, it is characterised in that institute
TVS diode is stated for unidirectional TVS diode or two-way TVS diode.
6. a kind of TVS diode that improves according to claim 3 insulate and pressure-resistant filter circuit, it is characterised in that institute
TVS diode module is stated to be in series or in parallel to form by single TVS diode, or by multiple TVS diodes.
7. a kind of TVS diode that improves according to claim 6 insulate and pressure-resistant filter circuit, it is characterised in that institute
TVS diode is stated for unidirectional TVS diode or two-way TVS diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176244.9A CN106959407A (en) | 2017-03-23 | 2017-03-23 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176244.9A CN106959407A (en) | 2017-03-23 | 2017-03-23 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106959407A true CN106959407A (en) | 2017-07-18 |
Family
ID=59470977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176244.9A Pending CN106959407A (en) | 2017-03-23 | 2017-03-23 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106959407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546731A (en) * | 2017-09-20 | 2018-01-05 | 奕瑞影像科技（太仓）有限公司 | A kind of plug-and-play circuit, interface circuit and electronic equipment |
| CN108173268A (en) * | 2018-02-12 | 2018-06-15 | 鲁东大学 | A kind of energy saver for absorbing mains by harmonics |
| CN114744602A (en) * | 2022-04-15 | 2022-07-12 | 华为技术有限公司 | Protection circuit and terminal equipment |
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|---|---|---|---|---|
| CN201450328U (en) * | 2009-08-27 | 2010-05-05 | 三一重机有限公司 | Power supply protective circuit of engineering machinery controller |
| CN202160101U (en) * | 2011-08-03 | 2012-03-07 | 重庆瑜欣平瑞电子有限公司 | Rectifying circuit for input end of inverter controller in portable generator |
| CN103117656A (en) * | 2013-02-23 | 2013-05-22 | 杭州乐图光电科技有限公司 | Voltage surge standing protection circuit and switching power supply with same |
| CN204495864U (en) * | 2015-03-24 | 2015-07-22 | 宁波三星智能电气有限公司 | Resistance to voltage protection circuit |
| CN105186847A (en) * | 2015-10-16 | 2015-12-23 | 桂林电子科技大学 | IGBT active clamping protection circuit |
| WO2017025467A1 (en) * | 2015-08-07 | 2017-02-16 | Abb Ag | Transient overvoltage and lightning protection of power connected equipment |
| CN206773137U (en) * | 2017-03-23 | 2017-12-19 | 北京精雕科技集团有限公司 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
-
2017
- 2017-03-23 CN CN201710176244.9A patent/CN106959407A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201450328U (en) * | 2009-08-27 | 2010-05-05 | 三一重机有限公司 | Power supply protective circuit of engineering machinery controller |
| CN202160101U (en) * | 2011-08-03 | 2012-03-07 | 重庆瑜欣平瑞电子有限公司 | Rectifying circuit for input end of inverter controller in portable generator |
| CN103117656A (en) * | 2013-02-23 | 2013-05-22 | 杭州乐图光电科技有限公司 | Voltage surge standing protection circuit and switching power supply with same |
| CN204495864U (en) * | 2015-03-24 | 2015-07-22 | 宁波三星智能电气有限公司 | Resistance to voltage protection circuit |
| WO2017025467A1 (en) * | 2015-08-07 | 2017-02-16 | Abb Ag | Transient overvoltage and lightning protection of power connected equipment |
| CN105186847A (en) * | 2015-10-16 | 2015-12-23 | 桂林电子科技大学 | IGBT active clamping protection circuit |
| CN206773137U (en) * | 2017-03-23 | 2017-12-19 | 北京精雕科技集团有限公司 | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546731A (en) * | 2017-09-20 | 2018-01-05 | 奕瑞影像科技（太仓）有限公司 | A kind of plug-and-play circuit, interface circuit and electronic equipment |
| CN108173268A (en) * | 2018-02-12 | 2018-06-15 | 鲁东大学 | A kind of energy saver for absorbing mains by harmonics |
| CN108173268B (en) * | 2018-02-12 | 2024-02-02 | 鲁东大学 | Energy-saving device for absorbing power grid harmonic waves |
| CN114744602A (en) * | 2022-04-15 | 2022-07-12 | 华为技术有限公司 | Protection circuit and terminal equipment |
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