CN106647708A - Fault diagnosis system of electric vehicle motor driving system - Google Patents
Fault diagnosis system of electric vehicle motor driving system Download PDFInfo
- Publication number
- CN106647708A CN106647708A CN201611226723.9A CN201611226723A CN106647708A CN 106647708 A CN106647708 A CN 106647708A CN 201611226723 A CN201611226723 A CN 201611226723A CN 106647708 A CN106647708 A CN 106647708A
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- China
- Prior art keywords
- pedal
- main
- diagnosis
- circuit
- main contactor
- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a fault diagnosis system of an electric vehicle motor driving system, and belongs to an electric vehicle motor driving control technology field. The fault diagnosis system is constituted by an information processing module, a pedal diagnosis module, a main contactor diagnosis module, and a main circuit diagnosis module. The information processing module is used for real-time on-line diagnosis of circuit breaking of a connecting line between an acceleration pedal and a motor controller control system, circuit breaking of a connecting line between a braking pedal and a motor controller control system, circuit breaking of a main contactor coil, abnormity of working of a main contact, and common faults of an electric driving system such as circuit breaking or short circuit of main circuit electric electronic power devices by using the pedal diagnosis module, the main contactor diagnosis module, and the main circuit diagnosis module, and is used to transmit diagnosis results outwards in a real-time manner by a CAN bus. Great meaning is provided for improving the safety performance of the electric vehicle motor driving system and the safety performance of the whole vehicle.
Description
Technical field
A kind of fault diagnosis system for electric automobile motor drive system, belongs to motor in electric automobile drive control skill
Art field.
Background technology
Motor driven systems are the important component parts of electric automobile, mainly including motor, electric machine controller, battery etc.
The annex such as core component and accelerator pedal, brake pedal and main contactor.Wherein electric machine controller is according to accelerator pedal and system
The aperture of dynamic pedal or position, based on vector control algorithm, produce pwm signal to the power electronic devices in its major loop (such as
IGBT or power MOSFET) break-make is controlled, and realizes the conversion between direct current and AC energy, and with this defeated of controlled motor is carried out
Go out torque or running speed；And motor can be operated in motoring condition or generating state according to the energy requirement of car load, electricity is realized
Can be with the conversion of mechanical energy；Electric machine controller is connected by main contactor (or switch) with vehicle power (such as battery).
The failure that electric machine controller easily occurs has many kinds, common are accelerator pedal and brake pedal and motor control
Line open circuit, the open circuit of main contactor control loop or main contactor contact is uncontrolled, main circuit electric power electricity between device control system
Sub- device open circuit or short circuit etc..These failures can have a strong impact on the normal operation of power drive system, and then vehicle security is produced
It is raw directly to affect.At present, there are many kinds to the approach of these diagnosing malfunctions, to pedal and the direct line of electric machine controller
And the method that the diagnosis of main contactor control loop open circuit is commonly used is the artificial side for checking when motor operating state is incorrect
Method goes to be diagnosed to be the reason for breaking down and type；And the failure of diagnosing motor controller main circuit power electronic power device is then
Often through installing sensor additional or realize by complicated software algorithm the open circuit to power electronic devices or short-circuit condition
Identification.These method generally existings needs it is artificial participate in, the relatively costly or diagnosis deficiency such as not in time.As electrified, intelligence
The electromechanical integrated product of energyization --- electric automobile proposes higher and higher requirement to the fault diagnosis of parts, and motor drives
Dynamic system is removed during power-on self-test, whole system is carried out outside fault detect, should also have online and real-time fault diagnosis
Function.Only in this way, when a failure occurs, counter-measure could be quickly taken, failure is processed or prompting department takes advantage of people
Member safeguards in time to power drive system.
The present invention gives a kind of electric drive system for electric vehicles fault diagnosis system, can drive to motor in electric automobile
System carries out line real time diagnosis, it is possible to diagnostic result is outwards transmitted in real time by CAN by DSP.The present invention is right
Improve electric automobile motor drive system and vehicle security is significant.
The content of the invention
The present invention provides a kind of fault diagnosis system for electric automobile motor drive system, and the system can be to electronic
Electric motor of automobile drive system failure carries out real-time online diagnosis, and diagnostic result is passed through into CAN to other controllers of car load
Send.This system improves the security of motor driven systems and car load.
To reach above-mentioned purpose, the fault diagnosis system of electric automobile motor drive system can be divided into four parts：Step on
Plate diagnostic module, main contactor diagnostic module, main circuit diagnostic module, message processing module.
The pedal diagnostic module is used to accelerate the fault diagnosis with brake pedal, and diagnosis content is pedal and information processing
Whether line is normal between module；
The main contactor diagnostic module is used for main contactor fault diagnosis, whether contacts control coil based on diagnosis content
Whether open circuit, main contactor contacts status are normal；
The main circuit diagnostic module is used for main circuit power electronic power device fault diagnosis, and diagnosis content is main circuit
Whether whether breaking, main circuit power electronic devices is short-circuit for power electronic power device；
Described information processing module is by a dsp chip and constitutes its normal work peripheral circuit.Dsp chip is
The core digital process chip of electric machine controller actuating motor control algolithm.Message processing module by CAN send pedal,
Main contactor, diagnosing main circuit fault information, for car load, other controllers are used.
The present invention can with real-time online to electric automobile motor drive system accelerator pedal and brake pedal, main contactor with
And main circuit power electronic power device carries out fault diagnosis so that when these component malfunctions, can be processed in time,
So as to improve the traffic safety of electric automobile.
Description of the drawings
In order to be illustrated more clearly that embodiment of the present invention or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing simple declaration to be used needed for description of the prior art.
Fig. 1 electric automobile motor drive systems and its fault diagnosis system structure chart
Fig. 2 fault diagnosis system pedal diagnostic module structure charts
Fig. 3 fault diagnosis system main contactor diagnostic module structure charts
Fig. 4 fault diagnosis systems main circuit diagnostic module structure and with main circuit connected mode figure
Specific embodiment
Referring to the drawings, the specific embodiment of the present invention is described in detail below.
Fig. 1 is electric automobile motor drive system according to the present invention and its fault diagnosis system structure chart.By can in figure
To find out：Electric automobile motor drive system is made up of motor 9, battery 8, electric machine controller 10, and electric machine controller 10 is by leading
Circuit 11, main contactor 7, accelerator pedal and brake pedal 16 and fault diagnosis system 18 are constituted, and main circuit 10 is by capacitor
19 and power electronic power device 1,2,3,4,5,6 constitute, fault diagnosis system involved in the present invention diagnoses mould by pedal
Block 17, main contactor diagnostic module 13, main circuit diagnostic module 14, message processing module 15 are constituted, and message processing module 15 can
To send diagnostic result to CAN 20, for car load, other controllers are used.
The structure of pedal diagnostic module 12 involved in the present invention as shown in Fig. 2 mainly comprising accelerator pedal diagnosis unit and
Brake pedal diagnosis unit, two units have identical circuit structure.Pedal diagnostic module and accelerator pedal and brake pedal
Between line be accelerator pedal signal input line IN2, accelerator pedal signal ground wire G1, brake pedal signal input line IN4 and
Brake pedal signal ground wire G2；Line between pedal diagnostic module and message processing module is diagnosis input line IN1, IN3, examines
Disconnected information output line OUT1 and OUT2 and DC power anode line V1, dc source ground wire G3.In accelerator pedal diagnosis unit,
The one end of resistance 21 is connected with the colelctor electrode of transistor 22；The other end of resistance 21 is connected with DC power anode line V1；Resistance 24 1
End is connected with the base stage of transistor 22, and the other end of resistance 24 is connected with diagnosis input line IN1；The emitter stage of transistor 22 and two poles
The anode of pipe 23 is connected, and the negative electrode of diode 23 is connected with information output line OUT1, the one end of resistance 25；The other end of resistance 25 with plus
Speed pedal signal input line IN2 connects.In brake pedal diagnosis unit, the one end of resistance 30 is connected with the colelctor electrode of transistor 27；
The other end of resistance 30 is connected with DC power anode line V1；The one end of resistance 26 is connected with the base stage of transistor 27, and resistance 26 is another
End is connected with diagnosis input line IN3；The emitter stage of transistor 27 is connected with the anode of diode 28, the negative electrode of diode 28 and information
Output line OUT2, the one end of resistance 29 are connected；The other end of resistance 29 is connected with brake pedal signal input line IN4.In the event
In barrier diagnostic system, the voltage swing between accelerator pedal signal input line IN2 and accelerator pedal signal ground wire G1 is stepped on acceleration
Plate aperture is directly proportional；Voltage swing between brake pedal signal input line IN4 and brake pedal signal ground wire G2 is stepped on acceleration
Plate aperture is directly proportional；DC voltage is provided by message processing module 15 between DC power anode line V1, dc source ground wire G3,
And magnitude of voltage is more than voltage between IN2 and G1, between IN4 and G2.
The structure of main contactor diagnostic module 13 involved in the present invention is as shown in figure 3, main contactor diagnostic module and master
Contactor control coil controls electrode line V2 and coil control negative line C1 connection, main contactor diagnostic module 13 and letter by coil
It is defeated by DC power anode line V3, dc source ground wire G4, diagnosis input line IN5 and diagnostic message between breath processing module 15
Outlet OUT3 connects, and DC power anode line V3 and dc source ground wire G4 provides DC voltage by message processing module 15.Line
Circle control electrode line V2, DC power anode line V3 are connected with the negative electrode of diode 32, the anode of diode 32, the one end of resistance 34,
The colelctor electrode of transistor 31 and coil control negative line C1 connect together；The other end of resistance 34, the one end of resistance 33 and diagnostic message
Output line OUT3 connects together, the emitter stage of the other end of resistance 33 and transistor 31, dc source ground wire G4 connections；Diagnosis input
Line IN5 and the one end of resistance 35 connect, and the other end of resistance 35 is connected with the base stage of transistor 31.
The structure of main circuit diagnostic module 14 involved in the present invention and with main circuit connected mode as shown in figure 4, main electricity
By connecting line C2 and C3 connection, main circuit diagnostic module 14 and message processing module 15 between road diagnostic module 14 and main circuit 11
Between connected by DC power anode line V3, dc source ground wire G5 and diagnostic message output line OUT4, DC power anode
DC voltage is provided by message processing module 15 between line V3, dc source ground wire G5.DC power anode line V3 and diode
39 anodes are connected；The anode of diode 39 and the one end of resistance 36 connect；The other end of resistance 36 and the one end of resistance 37 and connecting line
C2 one end connects；The power electronic power device 1 and 4 of the connecting line C2 other ends and a phase bridge arm in electric machine controller main circuit it
Between line be connected；One end of the other end of resistance 37 and resistance 38 and diagnostic message output line OUT4 are connected；Resistance
38 other end is connected with dc source ground wire G5 and connecting line C3 one end；The connecting line C3 other ends are female with main circuit direct current
Line-connection.
Message processing module 15 involved in the present invention, is made up of digital processing chip DSP with peripheral circuit, and it can lead to
Cross own CAN-bus interface to be connected with car load CAN, diagnostic message is sent in real time in CAN.Dsp chip can be with
To battery tension, the dc bus+of main circuit 11 and dc bus-between voltage be acquired.
Line between message processing module 15 involved in the present invention and pedal diagnostic module 13 is that the diagnosis in Fig. 2 is defeated
Enter line IN1, IN3, diagnostic message output line OUT1 and OUT2 and DC power anode line V1, dc source ground wire G3.When right
When the on off operating mode of accelerator pedal signal input line IN2 is diagnosed, need to be turned on by IN1 driving transistors 22, now
Current potential on OUT1 should be breaking apparently higher than the potential range of accelerator pedal car load normal work, otherwise IN2；When to brake pedal
When the on off operating mode of signal connecting line IN4 is diagnosed, need to be turned on by IN3 driving transistors 27, now the electricity on OUT2
Position should be breaking apparently higher than the potential range of brake pedal normal work, otherwise IN4.
Message processing module 15 involved in the present invention is dc source in Fig. 3 with the line of main contactor diagnostic module 13
Electrode line V3, dc source ground wire G4, diagnosis input line IN5 and diagnostic message output line OUT3.When carrying out to main contactor
During fault diagnosis, disconnected by IN5 controlling transistors 31 first, when main contactor coil open circuit, OUT3 current potentials and G4 current potentials
Equal, otherwise main contactor coil is normal；Now, if detecting the both end voltage of main circuit electric capacity 19 and the voltage phase of battery 8
Deng then main contactor contact does not turn off, main contactor contact fault；Turned on by IN5 driving transistors 31, if now main contact
Device contact is not turned on, then the both end voltage of main circuit electric capacity 19 and the voltage of battery 8 are unequal, and now main contactor contact is not closed
Close, main contactor contact fault.
Message processing module 15 involved in the present invention and the line of main circuit diagnostic module 14 are that dc source is being just in Fig. 4
Polar curve V3, dc source ground wire G5 and diagnostic message output line OUT4 connect.Message processing module 15 is applied by V3 and G6
One DC voltage for being much smaller than the voltage of battery 8, while DSP can control electric power by drive circuit in message processing module 15
The break-make of electronic power components 1,2,3,4,5,6.When power electronic power device 1,2,3,4,5,6 is all controlled to disconnected state
When, if OUT4 current potentials are not zero, and it is that V3 passes through partial pressure of the resistance 36,37 on resistance 38, otherwise power electronic power device
There is short circuit；When some conducting of bridge arm power electronic power device 1,3,5 on main circuit, OUT4 current potentials should be storage battery
Pressure is by 37 partial pressures on resistance 38, otherwise the power electronic power device open circuit；When bridge arm power electronics work(under main circuit
During some conducting of rate device 4,6,2, OUT4 current potentials should be zero, otherwise the power electronic power device open circuit.
Claims (4)
1. a kind of fault diagnosis system of electric automobile motor drive system, it is characterised in that fault diagnosis system is by information processing
Module, pedal diagnostic module, main contactor diagnostic module, main circuit diagnostic module composition.Message processing module is examined by pedal
The disconnected information that transmits simulated is to the line between acceleration pedal of electric automobile and brake pedal and motor controller controls system
No open circuit carries out line real time diagnosis；The information that message processing module is transmitted by main contactor diagnostic module is to main contactor control
Whether coil processed is breaking, whether operation irregularity carries out line real time diagnosis for main contactor contact；Message processing module passes through main electricity
To electric machine controller main circuit power electronic power device, whether breaking or short circuit carries out line real time diagnosis to road diagnostic module.
2. the fault diagnosis system according to claims 1, it is characterised in that pedal diagnostic module is examined including accelerator pedal
Disconnected unit and brake pedal diagnosis unit, two units have identical circuit structure and identical diagnostic method, i.e., one straight
Stream voltage is applied on pedal signal line, by leading to transistor by a resistance, a transistor and a diode
Whether the voltage of disconnected control and pedal signal line is breaking to diagnose pedal signal line.
3. the fault diagnosis system according to claims 1, it is characterised in that main contactor diagnostic module adopts a crystalline substance
After body pipe is connected with main contactor control coil, according to the voltage signal that transistor collector voltage is obtained Jing after two electric resistance partial pressures
And whether electric machine controller main circuit DC bus-bar voltage breaks with the numerical relation of battery tension to main contactor coil
Whether road, main contactor contact are diagnosed extremely.
4. the fault diagnosis system according to claims 1, it is characterised in that by diode and a resistance and motor
The bridge arm two of controller main circuit one power electronic power device junction applied voltage, by two resistance of voltage Jing point
Whether the on off state diagnosis power electronic power device of six power electronic power devices of magnitude of voltage and main circuit after pressure
It is working properly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226723.9A CN106647708A (en) | 2016-12-27 | 2016-12-27 | Fault diagnosis system of electric vehicle motor driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611226723.9A CN106647708A (en) | 2016-12-27 | 2016-12-27 | Fault diagnosis system of electric vehicle motor driving system |
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| Publication Number | Publication Date |
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| CN106647708A true CN106647708A (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611226723.9A Pending CN106647708A (en) | 2016-12-27 | 2016-12-27 | Fault diagnosis system of electric vehicle motor driving system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901560A (en) * | 2019-04-04 | 2019-06-18 | 奇瑞新能源汽车技术有限公司 | A kind of storage method of new-energy automobile power drive system fail frost frame |
| CN113771631A (en) * | 2021-09-28 | 2021-12-10 | 南京禄协信息科技有限公司 | Electric drive fault diagnosis system based on artificial intelligence algorithm |
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|---|---|---|---|---|
| DE19833413C2 (en) * | 1998-07-24 | 2001-07-12 | Siemens Ag | Method for reading out at least one potentiometric sensor |
| US20040263180A1 (en) * | 2003-06-24 | 2004-12-30 | Rogers Bruce A. | Reference voltage diagnostic suitable for use in an automobile controller and method therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901560A (en) * | 2019-04-04 | 2019-06-18 | 奇瑞新能源汽车技术有限公司 | A kind of storage method of new-energy automobile power drive system fail frost frame |
| CN113771631A (en) * | 2021-09-28 | 2021-12-10 | 南京禄协信息科技有限公司 | Electric drive fault diagnosis system based on artificial intelligence algorithm |
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