CN106370997A - H-bridge driving circuit detection device and method in EPS system - Google Patents
H-bridge driving circuit detection device and method in EPS system Download PDFInfo
- Publication number
- CN106370997A CN106370997A CN201610769400.8A CN201610769400A CN106370997A CN 106370997 A CN106370997 A CN 106370997A CN 201610769400 A CN201610769400 A CN 201610769400A CN 106370997 A CN106370997 A CN 106370997A
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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 an H-bridge driving circuit detection device and method in an EPS system. The detection device can detect the phase current and the bus current of a motor through a first current sensor S1 and a second current sensor S2 to effectively avoid the same direction instant locking and non-planning assistance of the motor, realize the accident prevention and accident avoiding and improve the safety and the operability of the system. The H-bridge driving circuit detection device in the EPS system can collect the current value of a driving circuit in the motor operation state and the follow current state in real time to improve the measurement and control precision, allow the motor to provide stable and effective assistance in different work conditions and ensure the vehicles to perform light and flexible turning at the low speed, have enough road feel for turning at the high speed and have good tracking performance and operation stability. The present invention further provides an H-bridge driving circuit detection method in the EPS system based on the H-bridge driving circuit detection device. The H-bridge driving circuit detection device and method in the EPS system realize the detection of the H-bridge driving circuit.
Description
Technical field
The present invention relates to vehicle electric power-assisted steering device field, drive more particularly, to the h bridge in a kind of eps system
Circuit checker and method.
Background technology
With the development of automobile industry, the requirement more and more higher to vehicle safety for the people, the related system of automotive safety
More and more it is applied on automobile.The safety of automobile includes active safety and passive safety two big class.Actively
Safety refers to realize accident prevention and accident is avoided, and Accident prevention occurs.Because it is prevented trouble before it happens, so being increasingly subject to people
Pay attention to.
The market analysiss of eps show, in the market to possessing numerous additional functions especially to having active safety work(
The eps system of energy has strong demand.Motor and its control unit in eps system, as the execution list at people's car mutual interface
Unit, to its protection with to prevent design particularly important.Electric motor and controller unit on domestic and international market has incorporated to electricity at present
The fault mechanisms such as the excessively stream of machine, the short circuit of h bridge, h bridge open circuit, but may produce during the detection to electric current and operator
The phenomenon such as motor locking pay attention to not.
Current current detecting mode is electric machine phase current detection, the detection of bus low-side current and bus superior MCU etc. are single
One mode, also there is certain deficiency for the design of the aspects such as the timely open circuit finding h bridge mos, motor moment locking in it.
Content of the invention
It is contemplated that at least solving above-mentioned technical problem to a certain extent.
The primary and foremost purpose of the present invention is to overcome open circuit, the motor moment locking that can not find h bridge mos in time of prior art
Defect, the h bridge drive circuit detection means in a kind of eps system is provided.
A further object of the present invention is the h bridge drive circuit detection method providing in a kind of eps system.
For solving above-mentioned technical problem, technical scheme is as follows:
A kind of h bridge drive circuit detection means in eps system, including driven management module and h bridge drive circuit, described driving
Management module provide h bridge drive circuit driving voltage, driven management module also h bridge drive circuit is carried out real-time overvoltage,
Low pressure, the diagnosis of excessively stream and monitoring；H bridge drive circuit motor runs, and h bridge drive circuit includes 4 audions or field effect
Ying Guan, realizes, by the conducting of diagonal audion or field effect transistor, the purpose that motor operates forward or backwards, and described h bridge drives electricity
Road also includes the first current sensor s1 connecting with motor, and operating circuit and the earth terminal being connected on h bridge drive circuit
Between the second current sensor s2, the first current sensor s1 and the second current sensor s2 be electrically connected with driven management module
Connect.
In a kind of preferred scheme, 4 audions of described h bridge drive circuit or field effect transistor be designated as respectively q1, q2,
Q3 and q4, q1 and q4 are one group of diagonal audion or the field effect transistor of h bridge drive circuit, and during q1 and q4 conducting, motor m1 is just
To operating；Q2 and q3 is another group of diagonal audion or the field effect transistor of h bridge drive circuit, during q2 and q3 conducting, motor m1
Antiport.
A kind of detection method of above-mentioned h bridge drive circuit detection means, described detection method includes: in q1 and q4 conducting
When, if q2 turns on because of device fault itself or software logic mistake, lead to the left side circuit of h bridge drive circuit to lead directly to；
Or become suddenly big because the unexpected locking of motor leads to the second current sensor s2 electric current is detected, now driven management module is passed through
Detect the first current sensor s1 and the current value of the second current sensor s2, tracing trouble simultaneously turns off h bridge drive circuit, thus
Eps system power-assisted lost efficacy, or opened little assistant mode, to protect driver safety to travel.
In a kind of preferred scheme, described detection method also includes: in q4 conducting, when q1 turns off, electric motor loop passes through
Motor m1, q4, q2, the first current sensor s1 afterflow, if now driven management module detects the first current sensor s1
No current or excessively low current value, then be diagnosed as electric motor loop fault, tracing trouble simultaneously turns off h bridge drive circuit, ensures driver
Safety.
In a kind of preferred scheme, described detection method also includes: when q1 and q4 turns on, q2 is off-state, such as
Now q2 has damaged it is impossible to open fruit, then in motor commutation, feel has very strong fluctuation and pause and transition in rhythm or melody sense, drives
Management module carries out the current detecting of redundancy by the first current sensor s1 and the second current sensor s2, and q2 is examined in advance
Disconnected, once finding fault 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 drive circuit detection means, can by the first current sensor s1 and the second current sensor s2 detect electric machine phase current and
Bus current, moment locking and unplanned power-assisted, it is achieved that accident prevention and accident are avoided, improve system in the same direction effectively to prevent motor
The safety of system and operability.The present invention can Real-time Collection drive circuit motor operating state and freewheeling state electric current
Value, improves measurement and control accuracy, makes motor provide steady, effective power-assisted under different operating modes it is ensured that automobile is in low speed
When turn to light, flexible, during high speed turn to have enough road feels, good tracking performance and operational stability.The present invention goes back base
In above-mentioned h bridge drive circuit detection means, provide h bridge drive circuit detection method, described device and the side in a kind of eps system
Method combines and achieves the detection of h bridge drive circuit.
Brief description
Fig. 1 is the h bridge drive circuit detection means circuit diagram in eps system of the present invention.
Fig. 2 is the schematic diagram of h bridge drive circuit.
Fig. 3 is the state diagram when q1 and q4 turns on for the h bridge drive circuit.
Fig. 4 is the freewheeling state figure turning in q4, when q1 turns off for the h bridge drive circuit.
Specific embodiment
Being for illustration only property of accompanying drawing illustrates it is impossible to be interpreted as the restriction to this patent；
In order to the present embodiment is more preferably described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the chi of actual product
Very little；
To those skilled in the art, in accompanying drawing, some known features and its explanation may be omitted and be will be understood by.
With reference to the accompanying drawings and examples technical scheme is described further.
Embodiment 1
As Figure 1-4, the h bridge drive circuit detection means in a kind of eps system, drives including driven management module and h bridge
Circuit, described driven management module provides the running voltage of h bridge drive circuit, and driven management module is also entered to h bridge drive circuit
Row overvoltage in real time, low pressure, the diagnosis of excessively stream and monitoring；H bridge drive circuit motor runs, and h bridge drive circuit includes 4
Audion or field effect transistor, realize, by the conducting of diagonal audion or field effect transistor, the purpose that motor operates forward or backwards,
Described h bridge drive circuit also includes the first current sensor s1 connecting with motor, and the work being connected on h bridge drive circuit
The second current sensor s2 between circuit and earth terminal, the first current sensor s1 and the second current sensor s2 and driving tube
Reason module electrical connection.
In specific implementation process, 4 audions of described h bridge drive circuit or field effect transistor are designated as q1, q2, q3 respectively
And q4, q1 and q4 is one group of diagonal audion or the field effect transistor of h bridge drive circuit, and during q1 and q4 conducting, motor m1 is positive
Operating；Q2 and q3 is another group of diagonal audion or the field effect transistor of h bridge drive circuit, and during q2 and q3 conducting, motor m1 is anti-
To operating.
A kind of detection method of above-mentioned h bridge drive circuit detection means, described detection method includes: in q1 and q4 conducting
When, if q2 turns on because of device fault itself or software logic mistake, lead to the left side circuit of h bridge drive circuit to lead directly to；
Or become suddenly big because the unexpected locking of motor leads to the second current sensor s2 electric current is detected, now driven management module is passed through
Detect the first current sensor s1 and the current value of the second current sensor s2, tracing trouble simultaneously turns off h bridge drive circuit, thus
Eps system power-assisted lost efficacy, or opened little assistant mode, to protect driver safety to travel.
In specific implementation process, described detection method also includes: in q4 conducting, when q1 turns off, electric motor loop passes through electricity
Machine m1, q4, q2, the first current sensor s1 afterflow, if now driven management module detects the first current sensor s1 no
Electric current or excessively low current value, then be diagnosed as electric motor loop fault, tracing trouble simultaneously turns off h bridge drive circuit, ensures driver's peace
Entirely.
In specific implementation process, described detection method also includes: when q1 and q4 turns on, q2 is off-state, if
Now q2 has damaged it is impossible to open, then in motor commutation, and feel has very strong fluctuation and pause and transition in rhythm or melody sense, driving tube
Reason module carries out redundant current detection by the first current sensor s1 and the second current sensor s2, q2 is diagnosed in advance, one
Denier finds fault and makes corresponding measure in time, ensures driver safety.
The present invention provides the h bridge drive circuit detection means in a kind of eps system, can pass through the first current sensor s1
Detect electric machine phase current and bus current with the second current sensor s2, effectively prevent motor moment locking and unplanned help in the same direction
Power, it is achieved that accident prevention and accident are avoided, improves safety and the operability of system.The present invention can drive electricity by Real-time Collection
Road, in the current value of motor operating state and freewheeling state, is improved measurement and control accuracy, so that motor is carried under different operating modes
For steady, effective power-assisted it is ensured that automobile turn in low speed light, flexible, during high speed turn to have enough road feels, good
Tracking performance and operational stability.The present invention is also based on above-mentioned h bridge drive circuit detection means, provides the h in a kind of eps system
Bridge drive circuit detection method, described device is combined with method and achieves the detection of h bridge drive circuit.
Same or analogous label corresponds to same or analogous part；
Described in accompanying drawing, the being for illustration only property of term of position relationship illustrates it is impossible to be interpreted as the restriction to this patent；
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to this
The restriction of bright embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-forms.There is no need to be exhaustive to all of embodiment.All in the present invention
Spirit and principle within any modification, equivalent and improvement of being made etc., should be included in the guarantor of the claims in the present invention
Within the scope of shield.
Claims (5)
1. the h bridge drive circuit detection means in a kind of eps system, including driven management module and h bridge drive circuit, described drive
Dynamic management module provides the running voltage of h bridge drive circuit, and driven management module also carries out mistake in real time to h bridge drive circuit
Pressure, low pressure, the diagnosis of excessively stream and monitoring；H bridge drive circuit motor runs, and h bridge drive circuit includes 4 audions or field
Effect pipe, purpose that motor operates forward or backwards is realized by the conducting of diagonal audion or field effect transistor it is characterised in that
Described h bridge drive circuit also includes the first current sensor s1 connecting with motor, and the work being connected on h bridge drive circuit
The second current sensor s2 between circuit and earth terminal, the first current sensor s1 and the second current sensor s2 and driving tube
Reason module electrical connection.
2. the h bridge drive circuit detection means in eps system according to claim 1 is it is characterised in that described h bridge drives
4 audions on galvanic electricity road or field effect transistor are designated as q1, q2, q3 and q4 respectively, q1 and q4 be one group of h bridge drive circuit diagonal
Audion or field effect transistor, q1 and q4 conducting when, motor m1 Positive work；Q2 and q3 is another group pair of h bridge drive circuit
The audion at angle or field effect transistor, during q2 and q3 conducting, motor m1 antiport.
3. a kind of detection method of h bridge drive circuit detection means described in claim 2 is it is characterised in that described detection method
Including: when q1 and q4 turns on, if q2 turns on because of device fault itself or software logic mistake, lead to h bridge to drive electricity
The left side circuit on road leads directly to；Or become suddenly big because the unexpected locking of motor leads to the second current sensor s2 electric current is detected, this
When driven management module pass through to detect the current value of the first current sensor s1 and the second current sensor s2, tracing trouble simultaneously closes
Disconnected h bridge drive circuit, thus eps system power-assisted lost efficacy, protection driver safety travels.
4. the detection method of h bridge drive circuit detection means according to claim 3 is it is characterised in that described detection side
Method also includes: in q4 conducting, when q1 turns off, electric motor loop passes through motor m1, q4, q2, the first current sensor s1 afterflow, such as
Now driven management module detects the first current sensor s1 no current or crosses low current value fruit, then be diagnosed as electric motor loop event
Barrier, tracing trouble simultaneously turns off h bridge drive circuit, ensures driver safety.
5. the detection method of h bridge drive circuit detection means according to claim 3 is it is characterised in that described detection side
Method also includes: when q1 and q4 turns on, q2 is off-state, if now q2 has damaged it is impossible to open, then change in motor
Xiang Shi, feel has 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
Carry out current detecting, q2 is diagnosed in advance, once finding fault and making corresponding measure in time, ensure 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 true CN106370997A (en) | 2017-02-01 |
| CN106370997B CN106370997B (en) | 2018-11-27 |
Family
ID=57901911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741151A (en) * | 2017-02-16 | 2017-05-31 | 重庆龙润汽车转向器有限公司 | EPS application circuits based on the control of H bridge phase lines sample motor and its fault diagnosis |
| CN106788009A (en) * | 2017-02-16 | 2017-05-31 | 重庆龙润汽车转向器有限公司 | EPS application circuits based on the control of H bridge buses sample motor and its fault diagnosis |
| CN107493047A (en) * | 2017-10-12 | 2017-12-19 | 株洲易力达机电有限公司 | A kind of control of motor drive axle and diagnosis protection system based on EPS |
| 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 |
| CN111722090A (en) * | 2020-07-01 | 2020-09-29 | 中国第一汽车股份有限公司 | Open-circuit fault detection system and detection method |
| CN114152429A (en) * | 2021-11-30 | 2022-03-08 | 东风商用车有限公司 | H-bridge driving valve pre-diagnosis method, device, equipment and readable storage medium |
| CN116736068A (en) * | 2023-08-14 | 2023-09-12 | 天津德科智控股份有限公司 | Power fault characteristic data identification and processing method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741151A (en) * | 2017-02-16 | 2017-05-31 | 重庆龙润汽车转向器有限公司 | EPS application circuits based on the control of H bridge phase lines sample motor and its fault diagnosis |
| CN106788009A (en) * | 2017-02-16 | 2017-05-31 | 重庆龙润汽车转向器有限公司 | EPS application circuits based on the control of H bridge buses sample motor and its fault diagnosis |
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| 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 |
| CN107493047A (en) * | 2017-10-12 | 2017-12-19 | 株洲易力达机电有限公司 | A kind of control of motor drive axle and diagnosis protection system based on EPS |
| 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 |
| CN111722090A (en) * | 2020-07-01 | 2020-09-29 | 中国第一汽车股份有限公司 | Open-circuit fault detection system and detection method |
| WO2022001949A1 (en) * | 2020-07-01 | 2022-01-06 | 中国第一汽车股份有限公司 | Open-circuit fault detection system and detection method |
| CN114152429A (en) * | 2021-11-30 | 2022-03-08 | 东风商用车有限公司 | H-bridge driving valve pre-diagnosis method, device, equipment and readable storage medium |
| 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 |
| CN116736068A (en) * | 2023-08-14 | 2023-09-12 | 天津德科智控股份有限公司 | Power fault characteristic data identification and processing method |
| 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 |
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| CN106370997B (en) | 2018-11-27 |
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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. |