CN108872855A - A kind of new-energy automobile driving motor fault judgment method - Google Patents
A kind of new-energy automobile driving motor fault judgment method Download PDFInfo
- Publication number
- CN108872855A CN108872855A CN201810674042.1A CN201810674042A CN108872855A CN 108872855 A CN108872855 A CN 108872855A CN 201810674042 A CN201810674042 A CN 201810674042A CN 108872855 A CN108872855 A CN 108872855A
- Authority
- CN
- China
- Prior art keywords
- error
- degree
- phase
- phase current
- current
- 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.)
- Pending
Links
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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a kind of new-energy automobile driving motor fault judgment methods, which is characterized in that this approach includes the following steps：Obtain the electric current I of motor U, V, W triple lineU、IV、IW；Judge the Formulas I such as the vector sum of three-phase currentU+IV+IWWhether=0 is true, failure is not present if equation is set up, if the invalid degree of error δ for calculating every phase current of equation1、δ2、δ3；According to the three-phase current degree of error fault threshold θ of calibration, compared with making with the degree of error of every phase current, if maximum value reaches the fault threshold θ of calibration in three-phase current degree of error, failure, and parking checking are quoted, is debugged.If degree of error is less than fault threshold θ, failure is not reported.The present invention provides a kind of new-energy automobile driving motor fault judgment method, proposes the judgment method that a kind of cost free is increased, is simple and efficient for fault conditions such as motor binding post bolt looseness, winding short circuit, open circuits.
Description
Technical field
The present invention relates to new-energy automobile fault judgment method fields, and in particular to a kind of new-energy automobile driving motor event
Hinder judgment method.
Background technique
As new energy vehicle is increasing, more and more attention has been paid to motor is as new for the high voltage component safety problem on vehicle
Main power source in energy vehicle, operation that can be safe and reliable ought be the most important thing.The three-phase current when motor operates normally
Equilibrium, heat dissipation is balanced, and when there is binding post bolt looseness, winding short circuit, open circuit, three-phase loop resistance can be made not
Equilibrium, to keep three-phase current unbalanced, fever is abnormal, and long-time misoperation, heat can not be distributed, be eventually resulted in
Ablation at failure, seriously threatens vehicle safe driving.It is domestic at present for this fault condition not yet corresponding judgement and
Guard method finds that motor has been damaged when failure, and the design proposes a kind of electrical fault judgement in response to this
Method.
Summary of the invention
Object of the present invention is to：A kind of new-energy automobile driving motor fault judgment method is provided, for motor binding post spiral shell
The fault conditions such as bolt loosening, winding short circuit, open circuit propose the judgment method that a kind of cost free is increased, is simple and efficient.
The technical scheme is that：A kind of new-energy automobile driving motor fault judgment method, this method include following
Step：
S1：Obtain the electric current I of motor U, V, W triple lineU、IV、IW；
S2：Judge the Formulas I such as the vector sum of three-phase currentU+IV+IWWhether=0 is true, and failure is not present if equation is set up,
The degree of error δ of every phase current is calculated if equation is invalid1、δ2、δ3；
S3：According to the three-phase current degree of error fault threshold θ of calibration, compared with being made with the degree of error of every phase current,
If maximum value reaches the fault threshold θ of calibration in three-phase current degree of error, failure, and parking checking are quoted, is debugged.If
Degree of error is less than fault threshold θ, then does not report failure.
Further, the method for obtaining three-phase line current is three current sensors by electric machine controller itself
Acquire real-time current IU、IV、IW。
Further, the degree of error δ of every phase current1、δ2、δ3It calculates by the following method:
δ 1=| IU-ε|/ε； (2)
δ 2=| IV-ε|/ε； (3)
δ 3=| IW-ε|/ε； (4)
In formula：ε is the mean value of three-phase current virtual value, ε=(IU+IV+IW)/3；
It is an advantage of the invention that：The present invention can effectively be directed to the binding post bolt looseness of motor or electric machine controller,
The failures such as machine winding short circuit, open circuit judge and early warning, avoid that binding post ablation, winding occurs, or even threaten row
The event of vehicle safety occurs, and cost free is increased, is simple and efficient.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is the power drive system electrical schematic diagram of the embodiment of the present invention；
Fig. 2 is the breakdown judge flow chart of the embodiment of the present invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Fig. 1 power drive system electrical schematic diagram, in vehicle operation, pass through the three of electric machine controller itself
The real-time current I of a current sensor acquisitionU、IV、IW, carry out the vector sum etc. that three-phase current is judged as shown in Fig. 2 flow chart
Whether formula is true：
IU+IV+IW=0； (1)
If equation (1) is set up, it is determined as fault-free；
If sampled current value vector sum is unsatisfactory for equation (1), judge between each phase current values and three-phase current mean value
Degree of error：
δ 1=| IU-ε|/ε； (2)
δ 2=| IV-ε|/ε； (3)
δ 3=| IW-ε|/ε； (4)
In formula：ε is the mean value of three-phase current virtual value, ε=(IU+IV+IW)/3；
Secondly, the three-phase current degree of error fault threshold θ according to calibration does following judgement：
If following formula (5)：
max(δ1,δ2,δ3)>θ； (5)
It is true, then it is assumed that there are failures for motor, answer shutdown inspection, and can be that δ 1, δ 2 or δ 3 judge according to worst error degree
Generation be out of order in U phase, V phase or W phase, targetedly to be checked.
If above formula (5) is vacation, it is determined as error in the reasonable scope, is not necessarily to parking checking.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
It cans understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all to lead according to the present invention
The modification for wanting the Spirit Essence of technical solution to be done, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of new-energy automobile driving motor fault judgment method, which is characterized in that this approach includes the following steps：
S1：Obtain the electric current I of motor U, V, W triple lineU、IV、IW；
S2：Judge the Formulas I such as the vector sum of three-phase currentU+IV+IWWhether=0 is true, failure is not present if equation is set up, if waiting
Formula is invalid, calculates the degree of error δ of every phase current1、δ2、δ3；
S3：According to the three-phase current degree of error fault threshold θ of calibration, compared with being made with the degree of error of every phase current, if three
Maximum value reaches the fault threshold θ of calibration in phase current error degree, then quotes failure, and parking checking, debugging.If error
Degree is less than fault threshold θ, then does not report failure.
2. a kind of new-energy automobile driving motor fault judgment method as described in claim 1, which is characterized in that described to obtain three
The method of phase line current is to acquire real-time current I by three current sensors of electric machine controller itselfU、IV、IW。
3. a kind of new-energy automobile driving motor fault judgment method as described in claim 1, which is characterized in that every phase electricity
The degree of error δ of stream1、δ2、δ3It calculates by the following method:
δ 1=| IU-ε|/ε；
δ 2=| IV-ε|/ε；
δ 3=| IW-ε|/ε；
In formula：ε is the mean value of three-phase current virtual value, ε=(IU+IV+IW)/3。
4. a kind of new-energy automobile driving motor fault judgment method as described in claim 1, which is characterized in that if the three-phase
It is that δ 1, δ 2 or δ 3 sentence according to worst error degree when maximum value reaches the fault threshold θ of calibration and quotes failure in current error degree
Break and reports that failure occurs in U phase, V phase or W phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674042.1A CN108872855A (en) | 2018-06-27 | 2018-06-27 | A kind of new-energy automobile driving motor fault judgment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810674042.1A CN108872855A (en) | 2018-06-27 | 2018-06-27 | A kind of new-energy automobile driving motor fault judgment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108872855A true CN108872855A (en) | 2018-11-23 |
Family
ID=64295032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810674042.1A Pending CN108872855A (en) | 2018-06-27 | 2018-06-27 | A kind of new-energy automobile driving motor fault judgment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108872855A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490646A (en) * | 2018-11-30 | 2019-03-19 | 上海大郡动力控制技术有限公司 | New-energy automobile driving motor method for detecting open phase |
| CN112415378A (en) * | 2019-08-19 | 2021-02-26 | 顺丰科技有限公司 | Motor circuit break detection system, unmanned aerial vehicle and motor circuit break detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823181A (en) * | 2012-11-19 | 2014-05-28 | 珠海格力电器股份有限公司 | Motor assembling unit quality detection system and method |
| CN103823126A (en) * | 2014-03-04 | 2014-05-28 | 中国神华能源股份有限公司 | Method and system for monitoring three-phase current unbalance |
-
2018
- 2018-06-27 CN CN201810674042.1A patent/CN108872855A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823181A (en) * | 2012-11-19 | 2014-05-28 | 珠海格力电器股份有限公司 | Motor assembling unit quality detection system and method |
| CN103823126A (en) * | 2014-03-04 | 2014-05-28 | 中国神华能源股份有限公司 | Method and system for monitoring three-phase current unbalance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490646A (en) * | 2018-11-30 | 2019-03-19 | 上海大郡动力控制技术有限公司 | New-energy automobile driving motor method for detecting open phase |
| CN112415378A (en) * | 2019-08-19 | 2021-02-26 | 顺丰科技有限公司 | Motor circuit break detection system, unmanned aerial vehicle and motor circuit break detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8837097B2 (en) | Protection, monitoring or indication apparatus for a direct current electrical generating apparatus or a plurality of strings | |
| EP2338224B1 (en) | Protection system of a doubly-fed induction machine | |
| JP5369833B2 (en) | Electric vehicle charger and ground fault detection method | |
| JP5542942B2 (en) | Grounding device | |
| JP6112687B2 (en) | Method and apparatus for protecting multiple strings of photovoltaic generators from return current | |
| US9341665B2 (en) | Method and apparatus for high voltage isolation monitor for a vehicle | |
| CN104242774B (en) | A kind of electric machine phase current prediction and diagnostic method | |
| CN105572540B (en) | Adaptive electric automobile high-voltage safety fault diagnosis early warning positioning monitoring system | |
| CN108189672A (en) | A kind of integrated manipulator of electric automobile based on functional safety | |
| EP3208623A1 (en) | High impedance arc fault detection | |
| CN108872855A (en) | A kind of new-energy automobile driving motor fault judgment method | |
| CN109347060B (en) | A kind of differential error protection control method of aviation power system | |
| CN206685314U (en) | A kind of relay with load faulty detection function | |
| JP2010239837A (en) | Line-to-ground fault detector, charger for electric vehicles, and method of detecting line-to-ground fault | |
| JP5557714B2 (en) | Power conversion apparatus and control method thereof | |
| CN109742734A (en) | A kind of current foldback circuit with self-checking function | |
| CN111628485B (en) | Line protection method and system for three-terminal direct-current power transmission system | |
| JP2012210084A (en) | Excitation controller and excitation control method of synchronous generator | |
| JP5537360B2 (en) | Electric vehicle control device | |
| EP2090893B1 (en) | Method and apparatus for detecting ground faults by measuring dc current in an ac generator | |
| CN108872854A (en) | A kind of method for diagnosing faults of new-energy automobile driving motor three-phase cable | |
| CN214011426U (en) | Diagnostic circuit of overcurrent protection circuit | |
| JP2004248390A (en) | Semiconductor power converter | |
| JP5649699B2 (en) | Vehicle control device and failure detection method | |
| CN117310551A (en) | Motor winding short-circuit fault detection method based on multiple information analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |
|
| RJ01 | Rejection of invention patent application after publication |