CN106370997B - H-bridge drive circuit detection device and method in a kind of EPS system - Google Patents
H-bridge drive circuit detection device and method in a kind of EPS system Download PDFInfo
- Publication number
- CN106370997B CN106370997B CN201610769400.8A CN201610769400A CN106370997B CN 106370997 B CN106370997 B CN 106370997B CN 201610769400 A CN201610769400 A CN 201610769400A CN 106370997 B CN106370997 B CN 106370997B
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- Prior art keywords
- drive circuit
- bridge drive
- motor
- current sensor
- current
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Classifications
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- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
-
- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2829—Testing of circuits in sensor or actuator systems
Abstract
The present invention provides the H-bridge drive circuit detection device and method in a kind of EPS system, the detection device can detect electric machine phase current and bus current by the first current sensor S1 and the second current sensor S2, it effectively prevent motor moment locking in the same direction and unplanned power-assisted, it realizes accident prevention and accident is avoided, improve the safety and operability of system.The present invention can acquire driving circuit in the current value of motor operating state and freewheeling state in real time, improve measurement and control precision, motor is set to provide steady, effective power-assisted under different operating conditions, it is light, flexible to guarantee that automobile is turned in low speed, turning to when high speed has enough road feels, good tracking performance and operational stability.The present invention is also based on above-mentioned H-bridge drive circuit detection device, provides the H-bridge drive circuit detection method in a kind of EPS system, and described device combines the detection for realizing H-bridge drive circuit with method.
Description
Technical field
The present invention relates to vehicle electric power-assisted steering device fields, drive more particularly, to the H bridge in a kind of EPS system
Circuit checker and method.
Background technique
With the development of automobile industry, requirement of the people to vehicle safety is higher and higher, the relevant system of automotive safety
More and more it is applied on automobile.The safety of automobile includes active safety and passive safety two major classes.Actively
Safety, which refers to, realizes that accident prevention and accident are avoided, and prevents accident.Because it is prevented trouble before it happens, so increasingly by people
Pay attention to.
The market analysis of EPS shows, currently on the market to having numerous additional functions especially to active safety function
The EPS system of energy has strong demand.Motor and its control unit in EPS system, the execution list as people-car interaction interface
Member, to its protection and to prevent design particularly important.The electric motor and controller unit on domestic and international market has been incorporated to electricity at present
The fault mechanisms such as the overcurrent of machine, the short circuit of H bridge, H bridge open circuit, but in the detection and driver's operating process to electric current there may be
Motor locking phenomena such as pay attention to it is inadequate.
Current current detection mode is motor phase current detection, the detection of bus low-side current and bus superior MCU
Etc. single mode, for the open circuit, the motor moment locking that find H bridge MOS in time etc. design there is also it is certain not
Foot.
Summary of the invention
The present invention is directed to solve above-mentioned technical problem at least to a certain extent.
Primary and foremost purpose of the invention is the open circuit that cannot find H bridge MOS in time for overcoming the prior art, motor moment locking
Defect, the H-bridge drive circuit detection device in a kind of EPS system is provided.
The further object of the present invention is to provide the H-bridge drive circuit detection method in a kind of EPS system.
In order to solve the above technical problems, technical scheme is as follows：
A kind of H-bridge drive circuit detection device in EPS system, including driven management module and H-bridge drive circuit, it is described
Driven management module provides the driving voltage of H-bridge drive circuit, and driven management module also carries out real-time mistake to H-bridge drive circuit
The diagnosis and monitoring of pressure, low pressure, overcurrent；The operation of H-bridge drive circuit driving motor, H-bridge drive circuit include 4 triodes or field
Effect pipe realizes the purpose that motor operates forward or backwards, the H bridge driving by the conducting of diagonal triode or field-effect tube
Circuit further include with the concatenated first current sensor S1 of motor, and be connected on operating circuit and the ground connection of H-bridge drive circuit
The second current sensor S2, the first current sensor S1 and the second current sensor S2 between end is electrically connected with driven management module
It connects.
In a preferred solution, 4 triodes of the H-bridge drive circuit or field-effect tube be denoted as respectively Q1, Q2,
Q3 and Q4, Q1 and Q4 are one group of diagonal triode or field-effect tube of H-bridge drive circuit, and when Q1 and Q4 are connected, motor M1 is just
To operating；Q2 and Q3 is another group of diagonal triode or field-effect tube of H-bridge drive circuit, when Q2 and Q3 are connected, motor M1
Antiport.
A kind of detection method of above-mentioned H-bridge drive circuit detection device, the detection method include：It is connected in Q1 and Q4
When, if Q2 is connected because of device failure itself or software logic mistake, cause the left side route of H-bridge drive circuit straight-through；
Or because the unexpected locking of motor causes the second current sensor S2 to detect that electric current becomes larger suddenly, driven management module passes through at this time
The current value for detecting the first current sensor S1 and the second current sensor S2, diagnoses fault and turns off H-bridge drive circuit, thus
The failure of EPS system power-assisted, or small assistant mode is opened, to protect driver safety to travel.
In a preferred solution, the detection method further includes：When Q4 is connected, and Q1 is turned off, electric motor loop passes through
Motor M1, Q4, Q2, the first current sensor S1 afterflow, if driven management module detects the first current sensor S1 at this time
No current crosses low current value, then is diagnosed as electric motor loop failure, diagnoses fault and turn off H-bridge drive circuit, ensure driver
Safety.
In a preferred solution, the detection method further includes：When Q1 and Q4 is connected, Q2 is off-state, such as
Q2 has been damaged fruit at this time, is fail to open, then feel has very strong fluctuation and pause and transition in rhythm or melody sense in motor commutation, driving
Management module carries out the current detecting of redundancy by the first current sensor S1 and the second current sensor S2, is examined in advance Q2
It is disconnected, once finding failure and making corresponding measure in time, ensure driver safety.
Compared with prior art, the beneficial effect of technical solution of the present invention is：The present invention provides the H in a kind of EPS system
Bridge driving circuit detection device, can be detected by the first current sensor S1 and the second current sensor S2 electric machine phase current and
Bus current effectively prevent motor moment locking in the same direction and unplanned power-assisted, realizes accident prevention and accident is avoided, improve system
The safety and operability of system.The present invention can acquire driving circuit in the electric current of motor operating state and freewheeling state in real time
Value improves measurement and control precision, motor is made to provide steady, effective power-assisted under different operating conditions, guarantees automobile in low speed
When, turns to light, flexible, and turning to when high speed has enough road feels, good tracking performance and operational stability.The present invention goes back base
In above-mentioned H-bridge drive circuit detection device, the H-bridge drive circuit detection method in a kind of EPS system, described device and side are provided
Method combines the detection for realizing H-bridge drive circuit.
Detailed description of the invention
Fig. 1 is the H-bridge drive circuit detection device circuit diagram in EPS system of the present invention.
Fig. 2 is the schematic diagram of H-bridge drive circuit.
Fig. 3 is state diagram of the H-bridge drive circuit when Q1 and Q4 is connected.
Fig. 4 is freewheeling state figure of the H-bridge drive circuit when being connected in Q4, Q1 being turned off.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figs 1-4, the H-bridge drive circuit detection device in a kind of EPS system, including driven management module and H bridge
Driving circuit, the driven management module provide the operating voltage of H-bridge drive circuit, and driven management module also drives electricity to H bridge
Road carries out the diagnosis and monitoring of real-time over-voltage, low pressure, overcurrent；The operation of H-bridge drive circuit driving motor, H-bridge drive circuit packet
4 triodes or field-effect tube are included, realizes what motor operated forward or backwards by the conducting of diagonal triode or field-effect tube
Purpose, the H-bridge drive circuit further include with the concatenated first current sensor S1 of motor, and be connected on H-bridge drive circuit
Operating circuit and ground terminal between the second current sensor S2, the first current sensor S1 and the second current sensor S2 with
The electrical connection of driven management module.
In the specific implementation process, 4 triodes of the H-bridge drive circuit or field-effect tube are denoted as Q1, Q2, Q3 respectively
And Q4, Q1 and Q4 are one group of diagonal triode or field-effect tube of H-bridge drive circuit, when Q1 and Q4 are connected, motor M1 is positive
Operating；Q2 and Q3 is another group of diagonal triode or field-effect tube of H-bridge drive circuit, and when Q2 and Q3 are connected, motor M1 is anti-
To operating.
A kind of detection method of above-mentioned H-bridge drive circuit detection device, the detection method include：It is connected in Q1 and Q4
When, if Q2 is connected because of device failure itself or software logic mistake, cause the left side route of H-bridge drive circuit straight-through；
Or because the unexpected locking of motor causes the second current sensor S2 to detect that electric current becomes larger suddenly, driven management module passes through at this time
The current value for detecting the first current sensor S1 and the second current sensor S2, diagnoses fault and turns off H-bridge drive circuit, thus
The failure of EPS system power-assisted, or small assistant mode is opened, to protect driver safety to travel.
In the specific implementation process, the detection method further includes：When Q4 is connected, and Q1 is turned off, electric motor loop passes through electricity
Machine M1, Q4, Q2, the first current sensor S1 afterflow, if at this time driven management module detect the first current sensor S1 without
Electric current crosses low current value, then is diagnosed as electric motor loop failure, diagnoses fault and turn off H-bridge drive circuit, ensures driver's peace
Entirely.
In the specific implementation process, the detection method further includes：When Q1 and Q4 is connected, Q2 is off-state, if
Q2 has been damaged at this time, is fail to open, then feel has very strong fluctuation and pause and transition in rhythm or melody sense, driving tube in motor commutation
It manages module and redundant current detection is carried out by the first current sensor S1 and the second current sensor S2, Q2 is diagnosed in advance, one
Denier discovery failure simultaneously makes corresponding measure in time, ensures driver safety.
The present invention provides the H-bridge drive circuit detection device in a kind of EPS system, can pass through the first current sensor S1
Electric machine phase current and bus current are detected with the second current sensor S2, effectively prevent motor moment locking in the same direction and unplanned is helped
Power, realizes accident prevention and accident is avoided, and improves the safety and operability of system.The present invention can acquire driving electricity in real time
Measurement and control precision are improved, mentions motor under different operating conditions in the current value of motor operating state and freewheeling state in road
For steady, effective power-assisted, it is light, flexible to guarantee that automobile is turned in low speed, when high speed, which turns to, there are enough road feels, good
Tracking performance and operational stability.The present invention is also based on above-mentioned H-bridge drive circuit detection device, provides the H in a kind of EPS system
Bridge driving circuit detection method, described device combine the detection for realizing H-bridge drive circuit with method.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (2)
- H-bridge drive circuit 1. a kind of detection method of the H-bridge drive circuit detection device in EPS system, in the EPS system Detection device includes driven management module and H-bridge drive circuit, and the driven management module provides the work electricity of H-bridge drive circuit Pressure, driven management module also carry out the diagnosis and monitoring of real-time over-voltage, low pressure, overcurrent to H-bridge drive circuit；H bridge driving electricity The operation of road driving motor, H-bridge drive circuit include 4 triodes or field-effect tube, pass through diagonal triode or field-effect tube The purpose that motor operates forward or backwards is realized in conducting, which is characterized in that the H-bridge drive circuit further includes concatenated with motor First current sensor S1, and the second current sensor being connected between the operating circuit of H-bridge drive circuit and ground terminal S2, the first current sensor S1 and the second current sensor S2 are electrically connected with driven management module；The 4 of the H-bridge drive circuit A triode or field-effect tube are denoted as Q1, Q2, Q3 and Q4 respectively, and Q1 and Q4 are one group of diagonal triode of H-bridge drive circuit Or field-effect tube, when Q1 and Q4 are connected, motor M1 Positive work；Q2 and Q3 is another group of three diagonal poles of H-bridge drive circuit When pipe or field-effect tube, Q2 and Q3 are connected, motor M1 antiport；It is characterized in that, the detection method includes：When Q1 and Q4 is connected, if Q2 is because of device failure itself or software logic Mistake and be connected, then cause the left side route of H-bridge drive circuit straight-through；Or because the unexpected locking of motor leads to the second current sense Device S2 detects that electric current becomes larger suddenly, and driven management module passes through the first current sensor S1 of detection and the second current sense at this time The current value of device S2 diagnoses fault and turns off H-bridge drive circuit, so that EPS system power-assisted fails, protects driver safety row It sails；The detection method further includes：When Q4 is connected, and Q1 is turned off, electric motor loop is passed by motor M1, Q4, Q2, the first electric current Sensor S1 afterflow is examined if driven management module detects the first current sensor S1 no current or crosses low current value at this time Break as electric motor loop failure, diagnose fault and turn off H-bridge drive circuit, ensures driver safety.
- 2. the detection method of H-bridge drive circuit detection device according to claim 1, which is characterized in that the detection side Method further includes：When Q1 and Q4 is connected, Q2 is off-state, if Q2 has been damaged at this time, is fail to open, then changing in motor Xiang Shi, feel have fluctuation and pause and transition in rhythm or melody sense, and driven management module passes through the first current sensor S1 and the second current sensor S2 Current detecting is carried out, Q2 is diagnosed in advance, once finding failure and making corresponding measure in time, ensures driver safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769400.8A CN106370997B (en) | 2016-08-31 | 2016-08-31 | H-bridge drive circuit detection device and method in a kind of EPS system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769400.8A CN106370997B (en) | 2016-08-31 | 2016-08-31 | H-bridge drive circuit detection device and method in a kind of EPS system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106370997A CN106370997A (en) | 2017-02-01 |
| CN106370997B true CN106370997B (en) | 2018-11-27 |
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| CN201610769400.8A Active CN106370997B (en) | 2016-08-31 | 2016-08-31 | H-bridge drive circuit detection device and method in a kind of EPS system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788009B (en) * | 2017-02-16 | 2019-11-08 | 重庆龙润汽车转向器有限公司 | EPS application circuit based on the control of H bridge bus sample motor and its fault diagnosis |
| CN106741151B (en) * | 2017-02-16 | 2019-05-21 | 重庆龙润汽车转向器有限公司 | EPS application circuit based on the control of H bridge phase line sample motor and its fault diagnosis |
| CN107493047B (en) * | 2017-10-12 | 2021-04-06 | 株洲易力达机电有限公司 | EPS-based motor drive axle control and diagnosis protection system |
| CN107707159A (en) * | 2017-10-12 | 2018-02-16 | 株洲易力达机电有限公司 | A kind of control of motor drive axle and diagnosis and protection method based on EPS |
| CN111722090B (en) * | 2020-07-01 | 2022-11-15 | 中国第一汽车股份有限公司 | Open-circuit fault detection system and detection method |
| CN114152429B (en) * | 2021-11-30 | 2024-02-02 | 东风商用车有限公司 | H-bridge driving valve pre-diagnosis method, device, equipment and readable storage medium |
| CN116736068B (en) * | 2023-08-14 | 2023-11-14 | 天津德科智控股份有限公司 | Power fault characteristic data identification and processing method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02202394A (en) * | 1989-01-27 | 1990-08-10 | Jidosha Denki Kogyo Co Ltd | Motor drive |
| US5111123A (en) * | 1990-11-16 | 1992-05-05 | Delco Electronics Corporation | Motor driver interface fault detection apparatus using initial turn-on and noise timers |
| JP2004274817A (en) * | 2003-03-05 | 2004-09-30 | Yazaki Corp | Motor forward/reverse drive circuit |
| CN201282438Y (en) * | 2008-09-26 | 2009-07-29 | 耿乐 | H bridge DC motor drive circuit |
| CN201302669Y (en) * | 2008-10-20 | 2009-09-02 | 中国海洋大学 | DC motor-driven system for monitoring running state |
| US8816614B2 (en) * | 2011-09-29 | 2014-08-26 | Infineon Technologies Ag | Diagnosis of over-current conditions in bipolar motor controllers |
| CN103856116B (en) * | 2014-03-17 | 2016-08-03 | 孟家宏 | Washing machine energy-saving control circuit and control method thereof |
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2016
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Effective date of registration: 20210204 Address after: 412000 Room 201, 100 Hangkong Road, Lusong District, Zhuzhou City, Hunan Province Patentee after: Hunan Dongjia Intelligent Technology Co.,Ltd. Address before: 412000 No.100 Hangkong Avenue, dongjiayu high tech park, Lusong District, Zhuzhou City, Hunan Province Patentee before: ZHUZHOU ELITE ELECTRO MECHANICAL Co.,Ltd. |
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