CN205186269U - Automobile -used couple of source low pressure electric power steering system - Google Patents
Automobile -used couple of source low pressure electric power steering system Download PDFInfo
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- CN205186269U CN205186269U CN201521027551.3U CN201521027551U CN205186269U CN 205186269 U CN205186269 U CN 205186269U CN 201521027551 U CN201521027551 U CN 201521027551U CN 205186269 U CN205186269 U CN 205186269U
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Abstract
The utility model discloses an automobile -used couple of source low pressure electric power steering system, including high -pressure energy storage unit, DCDC converter, power assisted steering motor and low pressure battery, wherein the DCDC converter is used for the high voltage DC electric energy conversion back with high -pressure energy storage unit, and output low -voltage direct current gives power assisted steering motor and/or low pressure storage battery power supply simultaneously, when high -pressure energy storage element malfunction, the DCDC converter does not have low voltage output, and this moment is automatic by the low pressure battery for the power supply of power assisted steering motor. The power supply has two kinds of power supply modes, and during high -pressure sudden failure, the automatic switch -over is low pressure battery drive, has improved electric power steering system's reliability to vehicle operation's security has improved. The utility model provides a steering system compares with current DCAC+DCDC scheme, has saved a DCAC for the structure is more succinct, and it is more convenient that whole car is arranged, it is higher to turn to the security, and the cost is lower.
Description
Technical field
The utility model relates to Vehicular turn technical field, relates to a kind of automobile-used double source low-pressure electric servo steering system specifically.
Background technology
Hybrid electric vehicle and pure electric vehicle type all have high-voltage energy storage unit and low tension battery, and high-voltage energy storage unit is for driving vehicle, and low tension battery is used for providing electric energy to various controller, headlight, instrument etc.Onboard, usually the voltage of high-voltage energy storage unit is called high pressure, the voltage of low tension battery is called low pressure.DCAC conv, refers to module direct current (DC) being converted to alternating current; DCDC refers to galvanic module direct current (DC) being converted to another voltage platform.DCAC and DCDC is the parts commonly used on hybrid electric vehicle and pure electric vehicle type.
Conventional truck provides power steering by driven by engine power steerig pump; existing hybrid electric vehicle and pure electric vehicle type; the operating mode driven separately by motor is shut down owing to there is driving engine; so need to add other forms of servo steering system, use high-voltage electric servo steering system in a large number.High pressure in so-called " high-voltage electric servo steering system " refers to that steering assist motor is high-voltage motor, drives pump head to rotate, provide power steering during high-voltage motor work.In addition, owing to there being driving engine to shut down operating mode, if do not mend electricity to low tension battery, low tension battery electric deficiency phenomenon is easily caused, so carry out benefit electricity often through DC-DC converter to low tension battery.As shown in Figure 1, DCAC conv obtains HVDC electric energy from high-voltage energy storage unit to typical structure, is converted to alternating current, for driving high-pressure power-assisted steering motor; DC-DC converter obtains HVDC electric energy from high-voltage energy storage unit simultaneously, is converted to low-voltage DC, connects low tension battery; The work of controller control DCAC and DCDC respectively.
The feeding electric motors of high-voltage electric servo steering system converts high voltage direct current to 220V alternating current by single high-voltage energy storage unit through DCAC conv, for driving steer motor, the DCAC conv caused once high-pressure system fault does not have high input voltage, electric boosting steering system will quit work, if now vehicle is at high-speed cruising, then may affect the traffic safety of vehicle.Part car load enterprise is in order to improve steering safety, no longer must not adding a set of low pressure servo steering system for subsequent use, when the high-pressure power-assisted steering system failure being detected, starting low pressure servo steering system for subsequent use at once, but this way cost is high, complicated layout.
So on hybrid electric vehicle and pure electric vehicle type, there is steering safety low, the problem that cost is high in the typical high-pressure power-assisted steering system as shown in Figure 1 adopted and this structure of DC-DC converter.
Therefore, utility model people of the present utility model needs a kind of up-to-date technology of design badly to improve its problem.
Utility model content
The purpose of this utility model is to provide one can improve prior art defect, improves the automobile-used double source low-pressure electric servo steering system of steering safety.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of automobile-used double source low-pressure electric servo steering system, comprise: high-voltage energy storage unit, DC-DC converter, servo-steering motor and low tension battery, wherein said DC-DC converter is used for after the conversion of the high direct voltage electric energy of described high-voltage energy storage unit, export low-voltage DC, power to described servo-steering motor and/or described low tension battery simultaneously; When described high-voltage energy storage cell failure, described DC-DC converter does not have low pressure to export, now automatic by described low tension battery give described servo-steering feeding electric motors.
Preferably, one is also comprised for controlling the controller of DC-DC converter and servo-steering machine operation.
Preferably, described servo-steering motor is low pressure servo-steering motor.
Preferably, the voltage of described low pressure servo-steering motor is 24V or 12V.
Preferably, described high-voltage energy storage unit is high-tension battery bag or super capacitor group.
Adopt technique scheme, the utility model at least comprises following beneficial effect:
Automobile-used double source low-pressure electric servo steering system described in the utility model, power supply has two kinds of powering modes, during high pressure sudden failure, automatically switches to low tension battery and drives, improve the reliability of electric boosting steering system, thus improve the safety of vehicle operating.The integrated system that the utility model proposes, compared with existing DCAC+DCDC scheme, eliminates a DCAC, and make structure more succinct, arrangement is more convenient, and steering safety is higher, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-pressure power-assisted steering system described in the prior art;
Fig. 2 is the schematic diagram of automobile-used double source low-pressure electric servo steering system described in the utility model;
Fig. 3 is the schematic diagram of a preferred embodiment middle controller.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 2, for meeting one of the present utility model automobile-used double source low-pressure electric servo steering system, comprise: high-voltage energy storage unit, DC-DC converter, servo-steering motor and low tension battery, wherein said DC-DC converter is used for after the conversion of the high direct voltage electric energy of described high-voltage energy storage unit, export low-voltage DC, power to described servo-steering motor and/or described low tension battery simultaneously; When described high-voltage energy storage cell failure, described DC-DC converter does not have low pressure to export, now automatic by described low tension battery give described servo-steering feeding electric motors.
Preferably, one is also comprised for controlling the controller of DC-DC converter and servo-steering machine operation.It is integrated on car in other controllers usually, and simple way also can without controller, and parts power on and just work.
Preferably, described servo-steering motor is low pressure servo-steering motor.
Preferably, the voltage of described low pressure servo-steering motor is 24V or 12V.
Preferably, described high-voltage energy storage unit is high-tension battery bag or super capacitor group.
Automobile-used double source low-pressure electric servo steering system described in the present embodiment belongs to electric boosting steering system category.The servo-steering motor adopted is low pressure steer motor, and voltage platform is identical with low tension battery voltage, 24V or 12V (manned vehicle is 12V, and commercial vehicle/comm..vehicle is generally 24V, occasionally has 12V).What the low pressure in " double source low pressure " referred to that servo-steering motor adopts is low voltage motor, and the double source in " double source low pressure " refers to the source of low tension, can be low tension battery, also can be the high-voltage energy storage unit of vehicle.When adopting the high-voltage energy storage unit of vehicle to power, by DC-DC converter, high potential in the high-voltage energy storage unit of vehicle is converted to 24V or 12V (according to vehicle low tension battery voltage different, adopt different DCDC module) identical from low tension battery voltage.Because this electric boosting steering system both can be powered by high-voltage energy storage unit, also can be powered by low tension battery, this design of system was when high pressure lost efficacy, and electric power steering still can normally work, and greatly improves the steering safety of vehicle.
Automobile-used double source low-pressure electric servo-steering and DCDC change integrated system except having except higher safety than existing high-pressure power-assisted steering system, also automatically have the function of DC-DC converter, can mend electricity to low tension battery.Automobile-used double source low-pressure electric servo-steering and DCDC change integrated system, are, by DCDC, high-tension current is converted to low tension, therefore when electric power steering power demand is less, automatically realize the benefit electricity to low tension battery.Therefore the integrated system that proposes of the utility model is compared with existing DCAC+DCDC scheme, eliminates a DCAC, and make structure more succinct, arrangement is more convenient, and steering safety is higher, and cost is lower.The utility model is applicable to hybrid electric vehicle and pure electric vehicle type.
In a preferred embodiment, as shown in Figure 3, described controller comprises control circuit 1 and power circuit 11, control circuit 1 comprises micro controller system 2, signal processing module 9, predrive module 10 and second source 8 four functional modules, power circuit 11 comprises the first power supply 12, current sample module 13 and power H-bridge circuit 14, and control circuit also comprises SENT digital signal interface 7.Described micro controller system 2 is connected with signal processing module 9, predrive module 10, second source 8, SENT digital signal interface 7, described signal processing module 9 is connected with current sample module 13, described predrive module 10 is connected with power H-bridge circuit 14, and described SENT digital signal interface 7 is connected with second source 8, micro controller system 2.
Its principle of work is as follows:
Torque information, for receiving digital torque signal 3, by between plate internal bus is sent to micro controller system 2 after decoding to signal by SENT digital signal interface 7, and micro controller system 2 also controls SENT digital signal interface 7 by internal bus between plate.Signal processing module 9 is for carrying out respective handling to the current sample module 13 on power circuit 11, and after process, signal sends micro controller system 2 in order to calculate.Micro controller system 2 carries out computing according to power-assisted model after receiving torque signal 3, vehicle speed signal 4, engine rotational speed signal 5, ignition signal 6, current sampling signal respectively, obtain corresponding motor control signal, and send this signal to predrive module 10, realize electric machine control sequential.Predrive module 10 can according to input logic for driving power H-bridge circuit 14 provides necessary driving voltage.Power circuit 11 focuses on high-power current circuit, comprising: the first power supply 12, current sample module 13, power H-bridge circuit 14.The effect of the first power supply 12 realizes power management and distribution.Current sample module 13 uses high-power resistance or current sampler to transfer big current to voltage signal, and sends control circuit 8 to and carry out signal transacting.Power H-bridge circuit 14 realizes controlling the pith of motor, and its control logic provided according to predrive module 10 is to flowing through current of electric direction and size controls, and it is connected with servo-steering motor.
Compared with prior art, its advantage is as follows:
1) this controller circuitry and intelligent torque sensor carry out digital communication based on SENT communications protocol;
2) this controller circuitry achieves perfect fault diagnosis functions;
3) antijamming capability that gathers torque signal of this controller circuitry is strong;
4) this controller circuitry can be connected with intelligent torque sensor and uses.Namely can realize the torque servo control to motor by this controller circuitry, realize output torque and become certain relation with input torque.Final realization makes the easy object lightly of driver's steering wheel operation when driving at low speed.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. an automobile-used double source low-pressure electric servo steering system, it is characterized in that, comprise: high-voltage energy storage unit, DC-DC converter, servo-steering motor and low tension battery, wherein said DC-DC converter is used for after the conversion of the high direct voltage electric energy of described high-voltage energy storage unit, export low-voltage DC, power to described servo-steering motor and/or described low tension battery simultaneously; When described high-voltage energy storage cell failure, described DC-DC converter does not have low pressure to export, now automatic by described low tension battery give described servo-steering feeding electric motors.
2. automobile-used double source low-pressure electric servo steering system as claimed in claim 1, is characterized in that: also comprise one for controlling the controller of DC-DC converter and servo-steering machine operation.
3. automobile-used double source low-pressure electric servo steering system as claimed in claim 2, is characterized in that: described servo-steering motor is low pressure servo-steering motor.
4. automobile-used double source low-pressure electric servo steering system as claimed in claim 3, is characterized in that: the voltage of described low pressure servo-steering motor is 24V or 12V.
5. the automobile-used double source low-pressure electric servo steering system as described in as arbitrary in claim 1-4, is characterized in that: described high-voltage energy storage unit is high-tension battery bag or super capacitor group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521027551.3U CN205186269U (en) | 2015-12-10 | 2015-12-10 | Automobile -used couple of source low pressure electric power steering system |
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| CN201521027551.3U CN205186269U (en) | 2015-12-10 | 2015-12-10 | Automobile -used couple of source low pressure electric power steering system |
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| CN205186269U true CN205186269U (en) | 2016-04-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346594A (en) * | 2015-12-10 | 2016-02-24 | 苏州绿控传动科技有限公司 | Automotive dual-source low-voltage electric power-assisted steering system |
| DE102018220430A1 (en) | 2018-11-28 | 2020-05-28 | Robert Bosch Gmbh | Electrochemical energy storage system |
| CN112298340A (en) * | 2019-07-25 | 2021-02-02 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
-
2015
- 2015-12-10 CN CN201521027551.3U patent/CN205186269U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346594A (en) * | 2015-12-10 | 2016-02-24 | 苏州绿控传动科技有限公司 | Automotive dual-source low-voltage electric power-assisted steering system |
| DE102018220430A1 (en) | 2018-11-28 | 2020-05-28 | Robert Bosch Gmbh | Electrochemical energy storage system |
| CN112298340A (en) * | 2019-07-25 | 2021-02-02 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
| CN112298340B (en) * | 2019-07-25 | 2021-11-26 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
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Address after: 215200 No. 1268 Jiaotong South Road, Wujiang District, Suzhou City, Jiangsu Province Patentee after: SUZHOU GREEN CONTROL DRIVE SCIENCE AND TECHNOLOGY CO., LTD. Address before: 215200 No. 1268 Jiaotong South Road, Wujiang District, Suzhou City, Jiangsu Province Patentee before: Suzhou Lvkong Transmission Technology Co., Ltd. |