CN209505836U - A kind of electric car Electric Power Steering Control System - Google Patents
A kind of electric car Electric Power Steering Control System Download PDFInfo
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- CN209505836U CN209505836U CN201820418832.9U CN201820418832U CN209505836U CN 209505836 U CN209505836 U CN 209505836U CN 201820418832 U CN201820418832 U CN 201820418832U CN 209505836 U CN209505836 U CN 209505836U
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Abstract
The utility model discloses a kind of electric car Electric Power Steering Control Systems, transmission module and course changing control module connected to it are acquired comprising data, the data acquisition transmission module includes speed sensor array, torque sensing array, multiplexer switch, waveform processing circuit, A/D Acquisition Circuit and data transmission module, the course changing control module includes micro controller module, Hall sensor, display module, Phototube Coupling H-bridge drive circuit, H bridge power amplification circuit, motor, clutch, retarder, transfer, the utility model acquires dtc signal and speed signal in real time, pass through directional control circuit, H bridge motor-drive circuit and PWM pulse modulation technology realize the control to motor, so that circuit design is greatly simplified, improve the reliability of system.
Description
Technical field
The utility model belongs to power-assisted steering control field more particularly to a kind of electric car electric power steering control system
System.
Background technique
EPS steering system belongs to automotive safety associated components, and the requirement to the torque pulsation performance of motor control is high.It helps
Force motor uses permanent magnet synchronous motor, is driven by three-phase inversion full-bridge.In high-power electric servo steering system, generally
Executing agency using permanent magnet synchronous motor as power-assisted, the core control algolithm of permanent magnet synchronous motor include weak magnetic control and d,
The PI (proportional integration) of q axis is controlled.In conventional control method, parameter, the parameter of d axis and q axis PI control of weak magnetic control
Generally it is fixed and invariable.But in the operational process of practical electric boosting steering system, the temperature of motor can be increased, thus
The internal resistance of motor can change.In the case where motor internal resistance changes, same weak magnetic control parameter and PI control ginseng
The torque pulsation that number will cause motor control increases, to influence the feeling on hand of driver.
Electric boosting steering system is one of heat subject of automotive engineering field, and the main contents studied at present are EPS
The design of the control rule and hardware control of system, and the realization for controlling rule must be with a stabilization, reliable controller
Based on.8 single-chip microcontrollers that existing controller majority is enhanced based on function, also some DSP.Currently, with 32 bit processors
Core as high performance embedded system exploitation is the inexorable trend of embedded technology development.Arm processor is dashed forward because it has
Out the advantages of, obtains very extensive application in 32 8-digit microcontroller fields, is sure to occupy generation in 32 embedded system applications
Boundary first.In technical field of automotive electronics, from Body Control, chassis control, engine management, main passive safety system to vehicle-mounted
Amusement, information system etc. all be unable to do without the support of embedded technology, and therefore, arm processor has well in vehicle electric field
Application prospect.The structure and working principle of electric boosting steering system and its controller are had studied herein, and on this basis
Have studied the Electric Power Steering Control System based on ARM S3C44B0X single-chip microcontroller.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of electric car electricity for the deficiency of background technique
Dynamic power-assisted steering control system.
The utility model uses following technical scheme to solve above-mentioned technical problem:
A kind of electric car Electric Power Steering Control System acquires transmission module and connected to it turn comprising data
To control module, the data acquisition transmission module includes speed sensor array, torque sensing array, multiplexer switch, wave
Shape processing circuit, A/D Acquisition Circuit and data transmission module, the speed sensor array are successively opened by multiplexing respectively
Pass, waveform processing circuit connect the data transmission module, and the torque sensing array successively passes through multiplexer switch, A/D respectively
Acquisition Circuit connects the data transmission module；
The course changing control module includes micro controller module, Hall sensor, display module, the driving of Phototube Coupling H bridge
Circuit, H bridge power amplification circuit, motor, clutch, retarder, transfer, the micro controller module pass sequentially through light
It is electrically isolated H-bridge drive circuit and connects motor with H bridge power amplification circuit, the engine is separately connected deceleration by clutch
Device and transfer, the output end of the motor are also connected with the input terminal of Hall sensor, the output of the Hall sensor
The input terminal of end connection micro controller module, the display module are connect with micro controller module；
It also include power module, the power module includes battery and battery charge controller connected to it；
The battery charge controller includes charging control circuit, battery, charge/discharge control circuit, charging current detection mould
Block, terminal voltage detecting module, micro controller module, discharge current detection module, human-computer interaction module, pwm driver；
Alternating current connects battery by charging control circuit, for controlling battery charging；
Battery and charge/discharge control circuit, for controlling electric power storage tank discharge；
Charging current detection module, terminal voltage detecting module, discharge current detection module connect with micro controller module respectively
Connect, for distinguishing the charging current of real-time detection battery, in battery voltage, battery discharge current, will acquisition
Electric signal be uploaded to micro controller module；
Human-computer interaction module is connect with micro controller module, for checking the voltage status and charging and discharging currents shape of battery
State, and for setting microcontroller parameter threshold；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively, is used for root
According to the voltage and current parameter of acquisition, and then drive the pwm signal of charging control circuit and charge/discharge control circuit field-effect tube.
It is described micro- as a kind of further preferred scheme of electric car Electric Power Steering Control System of the utility model
Controller module uses 32 S3C44B0X single-chip microcontrollers.
As a kind of further preferred scheme of electric car Electric Power Steering Control System of the utility model, the vehicle
Fast sensor array is made of the vehicle speed sensor that chip model is DJS-11.
As a kind of further preferred scheme of electric car Electric Power Steering Control System of the utility model, described turn
Square sensor array is made of the torque sensor that chip model is 4503A.
It is described aobvious as a kind of further preferred scheme of electric car Electric Power Steering Control System of the utility model
Show module using LCD display.
The utility model compared with the prior art by using the above technical solution, has following technical effect that
1, the utility model acquires dtc signal and speed signal in real time, passes through directional control circuit, H bridge motor driven electricity
Road and PWM pulse modulation technology realize that the control to motor improves the reliability of system so that circuit design is greatly simplified；
2, the power supply module circuit structure of the utility model is simple, and number of devices is less, and component has high-temperature operation ring
Border requires, and volume compact, integral heat sink amount is smaller, is adapted for mount on that underground equipment is elongated, closed inner space, realizes to height
Width funtion, broad frequency signal are adjusted, limit and protect under warm environment；
3, the utility model is analyzed by the variation to voltage and current in battery operation, and rationally control stores
The progress of work of battery, to guarantee and improve the service life cycle of battery.
Detailed description of the invention
Fig. 1 is the structure principle chart of the utility model；
Fig. 2 is the power module structure schematic diagram of the utility model.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, a kind of electric car Electric Power Steering Control System, comprising data acquisition transmission module and with
Its course changing control module connected, the data acquisition transmission module are multiple comprising speed sensor array, torque sensing array, multichannel
With switch, waveform processing circuit, A/D Acquisition Circuit and data transmission module, the speed sensor array is respectively successively through excessive
Road multiplex switch, waveform processing circuit connect the data transmission module, and the torque sensing array is respectively successively by multiplexing
Switch, A/D Acquisition Circuit connect the data transmission module；
The course changing control module includes micro controller module, Hall sensor, display module, the driving of Phototube Coupling H bridge
Circuit, H bridge power amplification circuit, motor, clutch, retarder, transfer, the micro controller module pass sequentially through
Phototube Coupling H-bridge drive circuit connects motor with H bridge power amplification circuit, and the engine is separately connected by clutch to be subtracted
Fast device and transfer, the output end of the motor are also connected with the input terminal of Hall sensor, the Hall sensor it is defeated
Outlet connects the input terminal of micro controller module, and the display module is connect with micro controller module.
As shown in Fig. 2, also including power module, the power module includes battery and charge control connected to it
Device；
The battery charge controller includes charging control circuit, battery, charge/discharge control circuit, charging current detection mould
Block, terminal voltage detecting module, micro controller module, discharge current detection module, human-computer interaction module, pwm driver；
The alternating current connects battery by charging control circuit, for controlling battery charging；
Battery and charge/discharge control circuit, for controlling electric power storage tank discharge；
Charging current detection module, terminal voltage detecting module, discharge current detection module connect with micro controller module respectively
Connect, for distinguishing the charging current of real-time detection battery, in battery voltage, battery discharge current, will acquisition
Electric signal be uploaded to micro controller module；
Human-computer interaction module is connect with micro controller module, for checking the voltage status and charging and discharging currents shape of battery
State, and for setting microcontroller parameter threshold；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively, is used for root
According to the voltage and current parameter of acquisition, and then drive the pwm signal of charging control circuit and charge/discharge control circuit field-effect tube.
Wherein, the micro controller module uses 32 S3C44B0X single-chip microcontrollers, the vehicle speed sensor it is chip-shaped
It number is DJS-11, the chip model of the torque sensor is 4503A, and the display module uses LCD display.
When motor turning, torque sensor measures the output torque of steering wheel, gives controller ECU, and controller is comprehensive again
The speed signal sent by vehicle speed sensor is closed, and a target current is determined according to corresponding control strategy, controls motor
Rotation.The output torque of motor is applied to steering column output shaft by clutch, deceleration mechanism, and turns by rack-and-pinion etc.
Effect to device makes wheel deflect certain angle, to play the role of the power-assisted to steering system.
For this system after vehicle launch, system receives ignition signal, initially enters working condition, acquisition dtc signal and
Speed signal simultaneously gives single-chip microcontroller.According to fixed control rule, the side an of target current and motor rotation is determined by system
To, and rotated in a manner of PWM modulation by H-bridge circuit come driving motor.Meanwhile system adopts the output electric current of motor
On the one hand sample compares sampled result with target current, to control motor；On the other hand speed signal is combined,
To the protection to system.When current of electric is greater than the set value or speed is higher than setting value, in order to protect motor and system
Safety, controller will issue a control signal to relay, disconnect motor power, stop power-assisted, after system is normal, then it is extensive
Multiple assist function.
Core of the controller module of the utility model using 32 ARM S3C44B0X single-chip microcontrollers as controller, by
It is integrated with hardware resource abundant in S3C44B0X single-chip microcontroller, so that circuit design is greatly simplified, improves the reliable of system
Property, while also for the extension in system future and upgrading, there are certain leeway.Direction control signal and pwm signal combine, through light
Coupling is loaded into H-bridge drive circuit, controls the operating status of motor, and circuit is simple and easy.Pulse width modulation mode uses unipolarity
PWM avoids a possibility that metal-oxide-semiconductor is straight-through, and not only reliably, pulse duty cycle is also easy to adjust.
The S3C44B0X of SUMSUNG company is the architecture based on ARM7TDMI, and is integrated on this basis abundant
Peripheral functional modules, mainly have: the Cache of 8KB, outside expand storage control, LCD controller, 2 UART, 5 PWM
Timer and 1 timer internal, 8 10, tunnel ADC, 71 I/O mouthfuls of general programmable, 8 exterior interrupts and house dog are fixed
When device.Meanwhile ARM single-chip microcontroller supports C language exploitation, is conducive to the exploitation and debugging of system controlling software.
The S3C44B0X of SUMSUNG company is the architecture based on ARM7TDMI, and is integrated on this basis abundant
Peripheral functional modules, mainly have: the Cache of 8KB, outside expand storage control, LCD controller, 2 UART, 5 PWM
Timer and 1 timer internal, 8 10, tunnel ADC, 71 I/O mouthfuls of general programmable, 8 exterior interrupts and house dog are fixed
When device.Meanwhile ARM single-chip microcontroller supports C language exploitation, is conducive to the exploitation and debugging of system controlling software.
For this system after vehicle launch, system receives ignition signal, initially enters working condition, acquisition dtc signal and
Speed signal simultaneously gives single-chip microcontroller.According to fixed control rule, the side an of target current and motor rotation is determined by system
To, and rotated in a manner of PWM modulation by H-bridge circuit come driving motor.Meanwhile system adopts the output electric current of motor
On the one hand sample compares sampled result with target current, to control motor；On the other hand speed signal is combined,
To the protection to system.When current of electric is greater than the set value or speed is higher than setting value, in order to protect motor and system
Safety, controller will issue a control signal to relay, disconnect motor power, stop power-assisted, after system is normal, then it is extensive
Multiple assist function.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in the utility model fields
Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art
The consistent meaning of meaning hereinafter, and unless defined as here, will not with idealization or meaning too formal come
It explains.
Above embodiments are only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within the scope of novel protected.The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but this is practical
It is novel to be not limited to the above embodiment, within the knowledge of a person skilled in the art, it can also not take off
It is made a variety of changes under the premise of from the utility model aims.
Claims (5)
1. a kind of electric car Electric Power Steering Control System, it is characterised in that: comprising data acquisition transmission module and with
Its course changing control module connected, the data acquisition transmission module are multiple comprising speed sensor array, torque sensing array, multichannel
With switch, waveform processing circuit, A/D Acquisition Circuit and data transmission module, the speed sensor array is respectively successively through excessive
Road multiplex switch, waveform processing circuit connect the data transmission module, and the torque sensing array is respectively successively by multiplexing
Switch, A/D Acquisition Circuit connect the data transmission module；
The course changing control module include micro controller module, Hall sensor, display module, Phototube Coupling H-bridge drive circuit,
H bridge power amplification circuit, motor, clutch, retarder, transfer, the micro controller module pass sequentially through photoelectricity every
Connect motor with H bridge power amplification circuit from H-bridge drive circuit, the motor by clutch be separately connected retarder and
Transfer, the output end of the motor are also connected with the input terminal of Hall sensor, and the output end of the Hall sensor connects
The input terminal of micro controller module is connect, the display module is connect with micro controller module；
It also include power module, the power module includes battery and battery charge controller connected to it；
The battery charge controller includes charging control circuit, battery, charge/discharge control circuit, charging current detection module, end
Voltage detection module, micro controller module, discharge current detection module, human-computer interaction module, pwm driver；
Alternating current connects battery by charging control circuit, for controlling battery charging；
Battery and charge/discharge control circuit, for controlling electric power storage tank discharge；
Charging current detection module, terminal voltage detecting module, discharge current detection module are connected with micro controller module respectively, are used
In the discharge current of voltage, battery in the charging current of real-time detection battery respectively, battery, by the telecommunications of acquisition
Number it is uploaded to micro controller module；
Human-computer interaction module is connect with micro controller module, for checking the voltage status and charging and discharging currents state of battery,
And for setting microcontroller parameter threshold；
The pwm driver is connected with micro controller module, charging control circuit, charge/discharge control circuit respectively, is adopted for basis
The voltage and current parameter of collection, and then drive the pwm signal of charging control circuit and charge/discharge control circuit field-effect tube.
2. a kind of electric car Electric Power Steering Control System according to claim 1, it is characterised in that: the micro-control
Device module processed uses 32 S3C44B0X single-chip microcontrollers.
3. a kind of electric car Electric Power Steering Control System according to claim 1, it is characterised in that: the speed
Sensor array is made of the vehicle speed sensor that chip model is DJS-11.
4. a kind of electric car Electric Power Steering Control System according to claim 1, it is characterised in that: the torque
Sensor array is made of the torque sensor that chip model is 4503A.
5. a kind of electric car Electric Power Steering Control System according to claim 1, it is characterised in that: the display
Module uses LCD display.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820418832.9U CN209505836U (en) | 2018-03-27 | 2018-03-27 | A kind of electric car Electric Power Steering Control System |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820418832.9U CN209505836U (en) | 2018-03-27 | 2018-03-27 | A kind of electric car Electric Power Steering Control System |
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| CN209505836U true CN209505836U (en) | 2019-10-18 |
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| CN201820418832.9U Expired - Fee Related CN209505836U (en) | 2018-03-27 | 2018-03-27 | A kind of electric car Electric Power Steering Control System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313120A (en) * | 2018-03-27 | 2018-07-24 | 新日(无锡)发展有限公司 | A kind of electric vehicle Electric Power Steering Control System |
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- 2018-03-27 CN CN201820418832.9U patent/CN209505836U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313120A (en) * | 2018-03-27 | 2018-07-24 | 新日(无锡)发展有限公司 | A kind of electric vehicle Electric Power Steering Control System |
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