CN102126436A - Power fail safeguard system and method of electric vehicle driving system - Google Patents
Power fail safeguard system and method of electric vehicle driving system Download PDFInfo
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- CN102126436A CN102126436A CN2011100560705A CN201110056070A CN102126436A CN 102126436 A CN102126436 A CN 102126436A CN 2011100560705 A CN2011100560705 A CN 2011100560705A CN 201110056070 A CN201110056070 A CN 201110056070A CN 102126436 A CN102126436 A CN 102126436A
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Abstract
The invention relates to a power fail safeguard system and method of an electric vehicle driving system. The power fail safeguard system comprises a power supply, a main power switch S0, an execution unit, a driving unit, a motor, a current sensor, an auxiliary power supply, a key switch S1, a control unit, a latch, an electronic switch S2 and an electronic switch S3. When the system is powered on, the key switch S1 is controlled to close the electronic switch S2, thus the latch and the control unit are powered on, and then the main power switch S0 is controlled to continuously supply power; when in power failure or power fail safeguard, the key switch S1 is switched off, and a latch release signal is sent to the latch after the control unit detects that a bus current signal output by the current sensor is zero; and the latch is controlled to firstly release the electronic switch S3 and then release the electronic switch S2, thus the execution unit is powered off and then the main power switch S0 is powered off. The method provided by the invention is especially applicable to electric vehicles with higher technical requirements and higher safety requirements.
Description
Technical field
The present invention relates to a kind of method of motor driven systems protection, particularly a kind of system and method for electric vehicle drive system power down protection.
Background technology
Along with the development of power electronics, microelectronic technique, the defencive function of motor driven systems has obtained further abundant and development.The shutoff mode of motor driven systems generally has two kinds, and a kind of is that directly big electric current turn-offs main circuit switch, and a kind of is that power circuit is turn-offed in control indirectly with the contactless switch on switches such as the button control power circuit, and there is following defective in existing these two kinds of shutoff modes:
1. when the running of the big electric current of motor, turn-off suddenly, perhaps directly cause arcing, perhaps break down or during improper operation, still cause arcing, all can have a strong impact on the life-span of main contact at the main contact place at control circuit at the main contact place.
2. though there are some arc-suppressing methods, barrier or various situation still can make arc suppressing apparatus puncture or damage for some reason.
3. the big electric current outage of motor can produce electromagnetic interference.
4. motor driven systems can not be realized zero-current switching when motor rotation, can not realize automatically shutting down of whole circuit after motor rotation stops.
5. for special occasions, motor cuts off the power supply moment, and the electric energy that motor remains in operation and produces is very big to the injury of control system.
How these defectives solve on technical requirements, safety requirements, cost requirement, the exigent electric vehicle of miniaturization, become the difficult point of concern especially.
Also never find on the market, can overcome the control system and the method on the electric vehicle of can be used for of above-mentioned shortcoming, find relevant patent and document by retrieval.Summary of the invention
The purpose of invention is to overcome the deficiency that prior art exists, and the control method of never seeing on a kind of market that overcomes these defectives, function practicality, well behaved motor driven systems power down protection is provided.
The present invention adopts following technical proposals:
System comprises electrical source of power, main power switch S0, performance element, driver element, motor, current sensor, accessory feed, key switch S1, and is provided with and has increased control unit, latch, electronic switch S2, electronic switch S3.
Described electrical source of power, main power switch S0, the described motor operation of driver element series connection rear drive, the break-make of described performance element control main power switch S0, described current sensor is arranged on the line between described main power switch S0, the driver element.
The method of attachment of its novelty comprises:
Described performance element, electronic switch S3 series connection, in parallel with described latch, control unit again, after the electronics switch S 2 of connecting again, be connected in the mouth of described accessory feed again; Described key switch S1, current sensor connect described control unit; The described latch of data-signal control linkage of described control unit; The signal of described latch is the described electronic switch S2 of control linkage, electronic switch S3 respectively; The signal control of described key switch S1 connects described electronic switch S2.
The control method of its novelty comprises:
The control method that powers on is:
After the described key switch S1 closure, the closed described electronic switch S2 of one tunnel signal control powers on for after the described electronic switch S2 conducting described latch, control unit, and one the tunnel powers on for an end of described performance element;
The bus current signal that described control unit detects the close commands of described key switch S1 and the output of described current sensor is behind zero the enable signal, to send control lock deposit data signal to described latch;
Described latch output two-way latch signal, described electronic switch S2 is latched in one tunnel control, and described electronic switch S3 is latched in the closed also control of one tunnel control, and to allow described performance element continued power, described main power switch S0 continues closed.
When outage or power down, control and guard method are:
After described key switch S1 disconnected, perhaps owing to fault or maloperation, cut-off signals sent described control unit to;
Institute's control unit detect the bus current signal of described current sensor output non-vanishing after, then do not order described latch to be transformed to and latch release position;
After the bus current signal that institute's control unit detects the output of described current sensor is zero, then will latchs release signal and send described latch to;
Described latch is successively exported the two-way release signal, and control earlier discharges described electronic switch S3, back control discharges described electronic switch S2, and to allow described performance element outage, described main power switch S0 disconnects.
Significant advantage of the present invention and beneficial effect are:
1. turn-off suddenly when the big electric current of motor turns round, the main contact place no longer causes arcing, has prolonged the service life of main contact greatly.
2. rely on the tight reliable design of arc suppressing apparatus no longer merely, prolong the service life of main circuit switch, corresponding cost decreases, and the type selecting of main circuit switch is also more flexible.
3. motor outage can not produce the electromagnetic interference that high-current leading rises again.
4. motor driven systems can be realized zero-current switching when motor rotation, can realize automatically shutting down of whole circuit after motor rotation stops.
5. for occasions such as electric vehicles, motor outage moment, the motor electric energy that produces that remains in operation is less, no longer control system is produced injury.
6. for occasions such as electric vehicles, turn-off control system and realized low cost and miniaturization.
Description of drawings
Fig. 1 is principle of the invention figure: figure medium power power supply, main power switch S0, performance element, driver element, motor, current sensor, accessory feed, key switch S1, control unit, latch, electronic switch S2, electronic switch S3.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail, among Fig. 1, the present invention has adopted with following technical proposals: system comprises electrical source of power, main power switch S0, performance element, driver element, motor, current sensor, accessory feed, key switch S1, and is provided with and has increased control unit, latch, electronic switch S2, electronic switch S3.Described electrical source of power, main power switch S0, the described motor operation of driver element series connection rear drive, the break-make of described performance element control main power switch S0, described current sensor is arranged on the line between described main power switch S0, the driver element.
For the representative type electric vehicle, with the pure electric automobile is embodiment, described current sensor, control unit on the driving control system of original electric vehicle because other purposes are arranged, so exist, can being used dexterously, it uses for the present invention is compatible, has saved cost.
Method of attachment also comprises: described performance element, electronic switch S3 series connection, and in parallel with described latch, control unit again, after the electronics switch S 2 of connecting again, be connected in the mouth of described accessory feed again; Described key switch S1, current sensor connect described control unit; The described latch of data-signal control linkage of described control unit; The signal of described latch is the described electronic switch S2 of control linkage, electronic switch S3 respectively; The signal control of described key switch S1 connects described electronic switch S2.
The control method that powers on is:
After the described key switch S1 closure, the closed described electronic switch S2 of one tunnel signal control powers on for after the described electronic switch S2 conducting described latch, control unit, and one the tunnel powers on for an end of described performance element; The bus current signal that described control unit detects the close commands of described key switch S1 and the output of described current sensor is behind zero the enable signal, to send control lock deposit data signal to described latch; Described latch output two-way latch signal, described electronic switch S2 is latched in one tunnel control, and described electronic switch S3 is latched in the closed also control of one tunnel control, and to allow described performance element continued power, described main power switch S0 continues closed.
When outage or power down, control and guard method are:
After described key switch S1 disconnected, perhaps owing to fault or maloperation, cut-off signals sent described control unit to; Institute's control unit detect the bus current signal of described current sensor output non-vanishing after, then do not order described latch to be transformed to and latch release position; After the bus current signal that institute's control unit detects the output of described current sensor is zero, then will latchs release signal and send described latch to; Described latch is successively exported the two-way release signal, and control earlier discharges described electronic switch S3, back control discharges described electronic switch S2, and to allow described performance element outage, described main power switch S0 disconnects.
Thus, technical scheme of the present invention can be implemented on various electronic or half electric vehicles such as electronlmobil and hybrid vehicle well, realizes simply.
Claims (3)
1. the system and method for an electric vehicle drive system power down protection, comprise electrical source of power, main power switch S0, performance element, driver element, motor, accessory feed, current sensor, key switch S1, described electrical source of power, main power switch S0, the described motor operation of driver element series connection rear drive, described performance element is controlled the break-make of described main power switch S0, described current sensor is arranged on described main power switch S0, on the line between the driver element, it is characterized in that, also be provided with control unit, latch, electronic switch S2, electronic switch S3; Method of attachment is: described performance element, electronic switch S3 series connection, and in parallel with described latch, control unit again, after the electronics switch S 2 of connecting again, be connected in the mouth of described accessory feed again; Described key switch S1, current sensor connect described control unit; The described latch of data-signal control linkage of described control unit; The signal of described latch is the described electronic switch S2 of control linkage, electronic switch S3 respectively; The signal control of described key switch S1 connects described electronic switch S2.
2. the system and method for electric vehicle drive system power down protection according to claim 1, it is characterized in that, the control method that powers on is: after the described key switch S1 closure, the closed described electronic switch S2 of one tunnel signal control, power on for after the described electronic switch S2 conducting described latch, control unit, the one tunnel powers on for an end of described performance element; The bus current signal that described control unit detects the close commands of described key switch S1 and the output of described current sensor is behind zero the enable signal, to send control lock deposit data signal to described latch; Described latch output two-way latch signal, described electronic switch S2 is latched in one tunnel control, and described electronic switch S3 is latched in the closed also control of one tunnel control, and to allow described performance element continued power, described main power switch S0 continues closed.
3. the system and method for electric vehicle drive system power down protection according to claim 1, it is characterized in that when outage or power down, control and guard method are: after described key switch S1 disconnects, perhaps owing to fault or maloperation, cut-off signals sends described control unit to; Institute's control unit detect the bus current signal of described current sensor output non-vanishing after, then do not order described latch to be transformed to and latch release position; After the bus current signal that institute's control unit detects the output of described current sensor is zero, then will latchs release signal and send described latch to; Described latch is successively exported the two-way release signal, and control earlier discharges described electronic switch S3, back control discharges described electronic switch S2, and to allow described performance element outage, described main power switch S0 disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100560705A CN102126436A (en) | 2011-03-09 | 2011-03-09 | Power fail safeguard system and method of electric vehicle driving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100560705A CN102126436A (en) | 2011-03-09 | 2011-03-09 | Power fail safeguard system and method of electric vehicle driving system |
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| CN102126436A true CN102126436A (en) | 2011-07-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225954A (en) * | 2016-03-25 | 2017-10-03 | 本田技研工业株式会社 | Supply unit, the control method of supply unit and control device |
| CN107472023A (en) * | 2017-08-21 | 2017-12-15 | 合肥翔望智能科技有限公司 | A kind of electric car power supply management system |
| CN109747421A (en) * | 2018-11-30 | 2019-05-14 | 帝亚一维新能源汽车有限公司 | A kind of power battery accidentally descends low pressure self saving control circuit, the system and method for electricity |
| CN109878438A (en) * | 2019-02-22 | 2019-06-14 | 湖南海博瑞德电智控制技术有限公司 | Power-supply system for new-energy automobile |
-
2011
- 2011-03-09 CN CN2011100560705A patent/CN102126436A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225954A (en) * | 2016-03-25 | 2017-10-03 | 本田技研工业株式会社 | Supply unit, the control method of supply unit and control device |
| CN107472023A (en) * | 2017-08-21 | 2017-12-15 | 合肥翔望智能科技有限公司 | A kind of electric car power supply management system |
| CN109747421A (en) * | 2018-11-30 | 2019-05-14 | 帝亚一维新能源汽车有限公司 | A kind of power battery accidentally descends low pressure self saving control circuit, the system and method for electricity |
| CN109878438A (en) * | 2019-02-22 | 2019-06-14 | 湖南海博瑞德电智控制技术有限公司 | Power-supply system for new-energy automobile |
| CN109878438B (en) * | 2019-02-22 | 2021-09-14 | 湖南海博瑞德电智控制技术有限公司 | Power supply system for new energy automobile |
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Application publication date: 20110720 |