CN107632224A - The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method - Google Patents
The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method Download PDFInfo
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- CN107632224A CN107632224A CN201710626529.8A CN201710626529A CN107632224A CN 107632224 A CN107632224 A CN 107632224A CN 201710626529 A CN201710626529 A CN 201710626529A CN 107632224 A CN107632224 A CN 107632224A
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- microcontroller
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Abstract
A kind of ground connection of new-energy automobile AC charging device disclosed by the invention and wrong phase detecting circuit, including first, second safety electric capacity, first, second sampling resistor, first, second clamp diode and microcontroller.Also disclose ground connection and the detection method of wrong phase detecting circuit of above-mentioned new-energy automobile AC charging device.The beneficial effects of the present invention are：Present invention employs a small amount of component, is coordinated using the microcontroller inside AC charging device and completes ground connection and misphase detection function.Simple in construction, fast response time of the invention, preparation cost is low, while also improves the safety and reliability of AC charging device, has farthest played the effect of microcontroller.
Description
Technical field
The present invention relates to new-energy automobile AC charging equipment technical field, more particularly to a kind of exchange of new-energy automobile to fill
The ground connection of electric installation and wrong phase detecting circuit and its detection method.
Background technology
As New-energy electric vehicle market reaches its maturity, the demand to be charged using civilian electricity to electric automobile is more next
It is bigger.Pure electronic, plug-in mixed electrical automobile is charged using fixed or Portable AC charging device, and user need to directly connect
AC charging device is touched, the personal safety for ensureing user is vital, and therefore, AC charging device possesses safeguard protection
Function, wherein, ground connection and misphase detection are one of important steps of safety protection function of AC charging device.
Existing many AC charging devices do not possess ground connection and misphase detection function, even if some AC charging devices have
This standby detection function, but exist the detection response time it is long, using component is excessive, can not to detect fiery zero line misphase, cost high
The shortcomings of.Therefore, applicant carried out beneficial exploration and trial, result of the above problems is have found, will be detailed below being situated between
The technical scheme to continue is caused under this background.
The content of the invention
One of technical problems to be solved by the invention are：For connecing for existing new-energy automobile AC charging device
Ground and wrong phase detecting circuit have that detection efficiency is low, the detection response time is long, using component is excessive, can not to detect fiery zero line wrong
The problems such as phase, high cost, and provide it is a kind of detect the response time is short, the component that uses is few, can detect fiery zero line misphase, into
The ground connection of this relatively low new-energy automobile AC charging device and wrong phase detecting circuit.
The two of the technical problems to be solved by the invention are：A kind of above-mentioned new-energy automobile AC charging device is provided
Ground connection and the detection method of wrong phase detecting circuit.
Ground connection and wrong phase detecting circuit as a kind of new-energy automobile AC charging device of first aspect present invention, bag
Include first, second safety electric capacity, first, second sampling resistor, first, second clamp diode and microcontroller；Described
First, one end of the second safety electric capacity is connected with the L phases and N of alternating current 220V civil power respectively, its other end respectively with described first,
One end connection of second sampling resistor, it is grounded after the other end connection of first, second sampling resistor, the first safety electricity
The public connecting end held between the first sampling resistor is connected with the first pin of the microcontroller, the second safety electric capacity
And the second commonly connected second pin with the microcontroller between sampling resistor is connected；First, second clamper two
The negative pole end of pole pipe is connected on first, second pin of the microcontroller, first, second clamp diode
Public connecting end after positive terminal connection between first, second sampling resistor is connected and is grounded.
As a kind of ground connection of above-mentioned new-energy automobile AC charging device of second aspect of the present invention and misphase detection electricity
The detection method on road, comprises the following steps：
Step S1, after AC charging device incoming transport 220V civil powers, the first safety electric capacity and the first sampling electricity
There is 220V AC voltage in the both ends of resistance, and the both ends of the second safety electric capacity and the second sampling resistor have 0V or small
Alternating voltage, now the microcontroller start-up operation；
Step S2, the voltage signal at the first, second sampling resistor both ends pass through first, second clamper two respectively
Pole pipe carries out forming the recognizable half-wave voltage signal of the microcontroller after clamper processing, and respectively via the of the microcontroller
First, second pin is inputted to the microcontroller；
Judgement is identified to the voltage signal inputted via first, second pin in step S3, the microcontroller；
When the voltage signal of second pin is more than the voltage signal of the first pin, then it is determined as that misphase feelings occur for AC charging device
Condition, the microcontroller identify and control AC charging device starting protection measure；When the voltage signal of the first pin is low electricity
When flat and the first pin voltage signal is more than the voltage signal of second pin, then it is determined as that ground connection occurs for AC charging device not
Good situation, the microcontroller production identify and control AC charging device starting protection measure.
As a result of technical scheme as above, the beneficial effects of the present invention are：Present invention employs a small amount of component,
Coordinated using the microcontroller inside AC charging device and complete ground connection and misphase detection function.The present invention is simple in construction, response
Speed is fast, and preparation cost is low, while also improves the safety and reliability of AC charging device, has farthest played micro-
The effect of controller.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to Fig. 1, what is provided in figure is a kind of ground connection of new-energy automobile AC charging device and wrong phase detecting circuit, is wrapped
Include safety electric capacity C1, C2, sampling resistor R1, R2, clamp diode D1, D2 and microcontroller 100.
Safety electric capacity C1, C2 one end are connected with the L phases and N of alternating current 220V civil power respectively, and its other end is respectively with adopting
Sample resistance R1, R2 one end connection, it is grounded after sampling resistor R1, R2 other end connection, safety electric capacity C1 and sampling resistor R1
Between public connecting end be connected with the pin 110 of microcontroller 100, the public company between safety electric capacity C2 and sampling resistor R2
Connect and be connected with the pin of microcontroller 100 120.Clamp diode D1, D2 negative pole end are connected to drawing for microcontroller 100
On pin 110,120, the public connecting end after clamp diode D1, D2 positive terminal connection between sampling resistor R1, R2 is connected
And it is grounded.
The ground connection of the new-energy automobile AC charging device of the present invention and the detection method of wrong phase detecting circuit, including it is following
Step：
Step S1, after AC charging device incoming transport 220V civil powers, safety electric capacity C1 and sampling resistor R1 both ends
220V AC voltage be present, and 0V or small alternating voltage be present in safety electric capacity C2 and sampling resistor R2 both ends, it is now micro-
Controller 100 is started working；
The voltage signal at step S2, sampling resistor R1, R2 both ends carries out clamper processing by clamp diode D1, D2 respectively
The recognizable half-wave voltage signal of microcontroller 100 is formed afterwards, and is inputted respectively via the pin 110,120 of microcontroller 100 to micro-
In controller 100；
Judgement is identified to the voltage signal inputted via pin 110,120 in step S3, microcontroller 100；Work as pin
When 120 voltage signal is more than the voltage signal of pin 110, then it is determined as that misphase situation, microcontroller occur for AC charging device
Device 100 identifies and controls AC charging device starting protection measure；When the voltage signal of pin 110 is low level and pin 110
Voltage signal be more than pin 120 voltage signal when, then be determined as AC charging device occur imperfect earth situation, microcontroller
Device 100 identifies and controls AC charging device starting protection measure.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (2)
1. ground connection and the wrong phase detecting circuit of a kind of new-energy automobile AC charging device, it is characterised in that including first, second
Safety electric capacity, first, second sampling resistor, first, second clamp diode and microcontroller；First, second safety
One end of electric capacity is connected with the L phases and N of alternating current 220V civil power respectively, and its other end is electric with described first, second sampling respectively
One end connection of resistance, it is grounded after the other end connection of first, second sampling resistor, the first safety electric capacity is adopted with first
Public connecting end between sample resistance is connected with the first pin of the microcontroller, the second safety electric capacity and the second sampling
The commonly connected second pin with the microcontroller between resistance is connected；The negative pole of first, second clamp diode
End is connected on first, second pin of the microcontroller, the positive terminal connection of first, second clamp diode
The public connecting end between first, second sampling resistor is connected and is grounded afterwards.
2. a kind of ground connection of new-energy automobile AC charging device as claimed in claim 1 and the detection side of wrong phase detecting circuit
Method, it is characterised in that comprise the following steps：
Step S1, after AC charging device incoming transport 220V civil powers, the first safety electric capacity and the first sampling resistor
There is 220V AC voltage in both ends, and the both ends of the second safety electric capacity and the second sampling resistor have 0V or small exchange
Voltage, now the microcontroller start-up operation；
Step S2, the voltage signal at the first, second sampling resistor both ends pass through first, second clamp diode respectively
Carry out forming the recognizable half-wave voltage signal of the microcontroller after clamper processing, and respectively via the first of the microcontroller,
Second pin is inputted to the microcontroller；
Judgement is identified to the voltage signal inputted via first, second pin in step S3, the microcontroller；When
When the voltage signal of two pins is more than the voltage signal of the first pin, then it is determined as that misphase situation, institute occur for AC charging device
Microcontroller is stated to identify and control AC charging device starting protection measure；When the voltage signal of the first pin is low level and the
When the voltage signal of one pin is more than the voltage signal of second pin, then it is determined as that imperfect earth feelings occur for AC charging device
Condition, the microcontroller identify and control AC charging device starting protection measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710626529.8A CN107632224A (en) | 2017-07-27 | 2017-07-27 | The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710626529.8A CN107632224A (en) | 2017-07-27 | 2017-07-27 | The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method |
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| CN107632224A true CN107632224A (en) | 2018-01-26 |
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| CN201710626529.8A Pending CN107632224A (en) | 2017-07-27 | 2017-07-27 | The ground connection of new-energy automobile AC charging device and wrong phase detecting circuit and its method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765430A (en) * | 2019-03-26 | 2019-05-17 | 北京经纬恒润科技有限公司 | A kind of insulation impedance detection system and detection method |
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| WO2015018093A1 (en) * | 2013-08-09 | 2015-02-12 | 吉瑞高新科技股份有限公司 | Charger with overvoltage and overcurrent protection and protection method therefor |
| CN203811727U (en) * | 2013-11-28 | 2014-09-03 | 杭州天丽科技有限公司 | Device for detecting commercial power |
| CN105842567A (en) * | 2016-05-25 | 2016-08-10 | 厦门义兰德机电工程有限公司 | Monitoring device for single-phase multi-arm sliding contact line power supplying system |
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| CN106645951A (en) * | 2017-02-24 | 2017-05-10 | 珠海格力电器股份有限公司 | Three-phase circuit detection apparatus and method |
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