CN202183594U - Inverted power supply with leakage protection function - Google Patents
Inverted power supply with leakage protection function Download PDFInfo
- Publication number
- CN202183594U CN202183594U CN201120102063XU CN201120102063U CN202183594U CN 202183594 U CN202183594 U CN 202183594U CN 201120102063X U CN201120102063X U CN 201120102063XU CN 201120102063 U CN201120102063 U CN 201120102063U CN 202183594 U CN202183594 U CN 202183594U
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- China
- Prior art keywords
- leakage
- power supply
- inverter
- treatment circuit
- protection function
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- Expired - Lifetime
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Abstract
The utility model provides a 12VCD-220VAC inverted power supply with a leakage protection function, which comprises an inverted power supply, a cast aluminum shell, a leakage protection sensor, a leakage signal amplifying circuit and a leakage shutting processing circuit. When a user uses the inverted power supply, and electric leakage of a power supply output loop occurs due to reasons such as damage of circuits and the like, a leakage detection circuit in a power supply detects leakage current and shuts down the output of the power supply.
Description
Technical field
The utility model relates to a kind of inverter protection treatment circuit, is meant a kind of DC-AC inverter that is mainly used in vehicle-mounted and family expenses especially.
Background technology
The tradition inverter does not possess creepage protection function; This makes the user in the process of using, cause current supply circuit to pass through power supply casing and extraneous the electric leakage because output lead is damaged with other reason; Thereby jeopardize user's life safety, also can cause certain damage simultaneously inverter itself.
In view of several kinds of above problems, a kind of new a kind of invention design with earth leakage protective inverter effective, that security performance is high is imperative.
The utility model content
The technical problem that the utility model will solve is to be used to solve the harm that inverter in use leaks electricity user's personal safety is brought.
The purpose of the utility model provides a kind of inverter with creepage protection function.In a single day it leaks electricity in the process that the user uses, export the personal safety that guarantees the user thereby inverter cuts off self immediately automatically, has effectively protected power supply itself simultaneously.
In order to achieve the above object; The utility model provides a kind of 12VDC-220VAC inverter with creepage protection function; It comprises inverter, cast aluminium shell, electricity leakage sensor, electric leakage signal amplifying circuit, electric leakage shutoff treatment circuit, and inner electric-leakage detection circuit will detect this leakage current and power cutoff output because circuit breakage and other reason thereof cause power supply current supply circuit power supply when leak electricity in the external world when the user uses inverter.
This programme is to utilize the inverter output loop when when electric leakage, two supply lines were through electricity leakage sensors; Electricity leakage sensor can produce an induced voltage; The voltage amplitude size is decided by the leakage current size; With voltage signal through the electric leakage signal amplifying circuit--the control centre that is transported to power supply after differential amplifier the amplifies shutoff treatment circuit that promptly leaks electricity, thus cut off the electricity supply output, and then protect human body safety.
That is: the purpose of the utility model is come concrete the realization through following technical scheme:
A kind ofly be with earth leakage protective inverter, it comprises shell, inverter, it is characterized in that: it also includes it and also includes the detection of electrical leakage treatment circuit.
Said detection of electrical leakage treatment circuit comprises: treatment circuit is turn-offed in electricity leakage sensor, electric leakage signal amplifying circuit and electric leakage.
The primary and secondary turn ratio of said electricity leakage sensor is 1: 600 line footpath: 1 level ∮ 0.1 of elementary ∮.
Also comprise comparator, the overturn point current potential of said comparator is 2V.
The beneficial effect of the utility model is: the safety in utilization and the reliability that improve inverter to greatest extent.
Description of drawings
Combine the description of its accompanying drawing through following embodiment, can further understand and use novel purpose, specific structural features and advantage in fact the utility model.Wherein, accompanying drawing is:
Fig. 1 is the detection of electrical leakage treatment circuit sketch map of the inverter of the utility model band creepage protection function.
Embodiment
The utility model is that be applied in automotive electronics power supply unit/household electrical appliance power supply unit a kind of is with earth leakage protective inverter, is the significant improvement of on the basis to the conventional inversion power supply, making, and has very important practice significance.
The utility model provides a kind of 12VDC-220VAC inverter with creepage protection function; It comprises inverter, cast aluminium shell, electricity leakage sensor, electric leakage signal amplifying circuit, electric leakage shutoff treatment circuit, and inner detection of electrical leakage treatment circuit will detect this leakage current and power cutoff output because circuit breakage and other reason thereof cause power supply current supply circuit power supply when leak electricity in the external world when the user uses inverter.Said detection of electrical leakage treatment circuit comprises: treatment circuit is turn-offed in electricity leakage sensor, electric leakage signal amplifying circuit and electric leakage.
Be illustrated in figure 1 as detection of electrical leakage, amplification, treatment circuit; Producing two opposite magnetic fields of intensity equal direction when electric current flows through L1 level of electricity leakage sensor when the power supply operate as normal cancels out each other; Thereby the secondary induction of L1 to magnetic field intensity be zero; This moment, the secondary no current of L1 flow through, and the device differential input signal that computing is amplified approaches zero, and 6 pin with U21B after this signal process is amplified more do not overturn; 7 pin output low level single-chip microcomputers detect this low level and are failure to actuate, and power supply is normally exported.When any supply lines of the primary return of the L1 electric current that elementary two coils of L1 flow through during with the extraneous electric leakage that takes place greater than 5mA stream unequal; Thereby can produce the magnetic field that intensity is certain; Thereby this magnetic field can be produced an induced voltage L1 level by secondary the sensing of L1, and the primary and secondary turn ratio of L1 as shown in the figure is 1: 600 line footpath: 1 level ∮ 0.1 of elementary ∮; Thereby this voltage compares greater than 6 pin current potential comparator toggles through 6 pin that differential amplifier amplifies back and U21B, and comparator toggles point current potential is: 2V; U21B 7 pin output high level turn-offs the personal safety of protecting the user with power supply output thereby detect after treatment circuit/single-chip microcomputer detects this level immediately.
The description of above-mentioned preferred embodiment makes those skilled in the art can make or use the utility model.The various modifications of these embodiment are conspicuous for a person skilled in the art, and the General Principle of definition can be applied among other embodiment and do not deviate from the spirit or the scope of the utility model here.Therefore, the embodiment that the utility model is not limited to illustrate here, and will meet and the principle and the novel feature the most wide in range consistent scope that disclose here.
Claims (3)
1. be with earth leakage protective inverter for one kind; It comprises shell, inverter; It is characterized in that: it also includes the detection of electrical leakage treatment circuit, and said detection of electrical leakage treatment circuit comprises: treatment circuit is turn-offed in the electricity leakage sensor that electrically connects successively, electric leakage signal amplifying circuit and electric leakage.
2. according to claim 1ly be with earth leakage protective inverter, it is characterized in that: the primary and secondary turn ratio of said electricity leakage sensor is 1: 600, line footpath: 1 level ∮ 0.1 of elementary ∮.
3. according to claim 1 or 2 arbitrary described earth leakage protective inverters of being with, it is characterized in that: also comprise comparator, the overturn point current potential of said comparator is 2V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120102063XU CN202183594U (en) | 2011-04-08 | 2011-04-08 | Inverted power supply with leakage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120102063XU CN202183594U (en) | 2011-04-08 | 2011-04-08 | Inverted power supply with leakage protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202183594U true CN202183594U (en) | 2012-04-04 |
Family
ID=46176616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120102063XU Expired - Lifetime CN202183594U (en) | 2011-04-08 | 2011-04-08 | Inverted power supply with leakage protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202183594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173243A (en) * | 2018-01-18 | 2018-06-15 | 苏州超云新能源有限公司 | inverter leakage protection circuit and inverter |
| CN108173243B (en) * | 2018-01-18 | 2024-05-17 | 苏州超云新能源有限公司 | Inverter leakage protection circuit and inverter |
-
2011
- 2011-04-08 CN CN201120102063XU patent/CN202183594U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173243A (en) * | 2018-01-18 | 2018-06-15 | 苏州超云新能源有限公司 | inverter leakage protection circuit and inverter |
| CN108173243B (en) * | 2018-01-18 | 2024-05-17 | 苏州超云新能源有限公司 | Inverter leakage protection circuit and inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 201800, B, Lane 518, Lane 1, Heng Yong Road, Shanghai, Jiading District 501-1 Patentee after: Shanghai Fengtian Electronic Co., Ltd. Address before: 200331, 3 floor, building 1570, 5 Gulang Road, Shanghai, Putuo District Patentee before: Shanghai Fengtian Electronic Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120404 |
|
| CX01 | Expiry of patent term |