CN100541958C - The current foldback circuit of controller of current vortex retarder - Google Patents
The current foldback circuit of controller of current vortex retarder Download PDFInfo
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- CN100541958C CN100541958C CNB2007100242710A CN200710024271A CN100541958C CN 100541958 C CN100541958 C CN 100541958C CN B2007100242710 A CNB2007100242710 A CN B2007100242710A CN 200710024271 A CN200710024271 A CN 200710024271A CN 100541958 C CN100541958 C CN 100541958C
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Abstract
The present invention relates to a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module (1) and output control circuit (4); it is characterized in that: also comprise sample circuit (6), comparator (2) and trigger (3); comparator (2) is connected with the output of high-power control module (1) respectively with sample circuit (6); the input of trigger (3) is connected with the output of comparator (2), and the output of trigger (3) is connected with output control circuit (4).The present invention has guaranteed the safety of high-power control module, has improved the reliability of retarder controller greatly, and the use cost of saving the user is greatly saved resources such as a large amount of copper materials, steel, plastics for country.
Description
Technical field
The present invention relates to a kind of current foldback circuit of controller of current vortex retarder, be used for the control of automobile auxiliary braking system, belong to vehicle electric field.
Background technology
Serious safety problems such as brake failure take place in automobile that loading capacity such as motorbus and lorry is big easily in the Chang Po highway section, even do not travel in the Chang Po highway section, the renewal cost of safeguarding of its brake system costliness also is the problem that is difficult to solution always.The U.S. as far back as last century the seventies just put into effect passenger vehicle and the lorry of legal provisions more than 5 tons and all current vortex retarder must be installed.Many-sided reasons such as consuming capacity in China owing to the user, never put into effect relevant law and standard, but along with ability to shoulder economically with to the raising of the attention degree of safety, installing and using of current vortex retarder accepted by lots of manufacturers and user.
Along with the appearance of national relevant law, current vortex retarder has become the standard configuration of commercial car, yet the control system of current vortex retarder is one of bottleneck of restriction current vortex retarder popularization and application always.Controller of current vortex retarder generally is divided into two classes: a class is a relay control mode, and a class is the electronic switch control mode.The shortcoming of relay control is: poor reliability, often to change relay, the coil working number of times is unbalanced, cause the highest coil burnout of frequency of utilization easily, thereby bring very many troubles to the user, also produce a large amount of relays, the discarded object of working of plastics, both wasted national a large amount of copper material, steel, plastics resource, also not environmental protection.Electronic control mode is contactless, the work of retarder all coils balance, and in the useful life of having improved retarder greatly, the user does not need frequent maintenance yet, can save a large amount of resources and manpower.
Yet; because all in the market electronic type retarder controllers all have a common problem; be exactly when retarder coil generation partial short-circuit or whole short circuit; its current foldback circuit can't be protected high-power control module timely and effectively; cause the high-power control module of controller to be burnt; cause a lot of retarder manufacturer still to use the control mode of relay till now, make the use cost of retarder very high, brought great waste.Its main cause is that the protected mode of product in the market all is to utilize the defencive function of high power module self or detect its operating current, carries out the A/D conversion, sends guarded command by MCU such as single-chip microcomputer or DSP then and carries out overcurrent protection.Because the current margin of high-power control module is all bigger; before short circuit current reaches its protection thresholding; might burn; if unexpected short circuit; no matter be the s operation control of himself defencive function or MCU; all have little time protection, the insecure phenomenon of present electronic control mode so just occurred.
Summary of the invention
The current foldback circuit that the purpose of this invention is to provide a kind of controller of current vortex retarder, this circuit can improve the reliability of controller of current vortex retarder, protects high-power control module timely and effectively.
The technical scheme that realizes above-mentioned purpose is: a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module and output control circuit; also comprise sample circuit, comparator and trigger; comparator is connected with the output of high-power control module respectively with sample circuit; the input of trigger is connected with the output of comparator, and the output of trigger is connected with output control circuit.
The another kind of technical scheme that realizes above-mentioned purpose is: a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module and output control circuit; also comprise sample circuit, comparator and latch; comparator is connected with the output of high-power control module respectively with sample circuit; the input of latch is connected with the output of comparator, and the output of latch is connected with output control circuit.
After adopting technique scheme; independent protective circuit by band " self-locking " function is realized protection to controller; protective circuit is totally independent of MCU work; in case and protective circuit starts; will enter " self-locking " state; no matter the control pin of the high-power control module of MCU is exported any state; all can't reopen this high power module; protective circuit can also be transferred to the operating state of protective circuit MCU or display unit, allows the user in time understand the operating state of retarder.Occur to protective circuit from overcurrent and turn-off the constant time lag that the time-delay of high-power control module has only logical circuit, generally within the number microsecond, can protect high-power control module very reliably, thereby improve the reliability of retarder controller greatly.Through our 1000 failtestss, it is invalid not take place once to protect, and the situation that high-power control module is burnt does not take place.
In a word, no matter be retarder coil generation partial short-circuit or whole short circuit, or the line short circuit; Short circuit just exists before no matter being to use in the process suddenly-applied short circuit still to open; as long as operating current is greater than preset threshold; protective circuit will be moved; with this road retarder coil automatic disconnection; and the relevant warning message of demonstration; and do not influence the part of other operate as normal; re-powering or manually control it after fixing a breakdown reworks; guaranteed the safety of high-power control module; improved the reliability of retarder controller greatly; save user's use cost greatly, save resources such as a large amount of copper materials, steel, plastics for country.
Description of drawings
Fig. 1 is the circuit block diagram of the current foldback circuit of controller of current vortex retarder of the present invention;
Fig. 2 is the another kind of circuit block diagram of the current foldback circuit of controller of current vortex retarder of the present invention;
Fig. 3 is the circuit theory diagrams of the current foldback circuit of controller of current vortex retarder of the present invention;
Fig. 4 is the circuit theory diagrams of output control circuit of the present invention;
Fig. 5 is the another kind of circuit theory diagrams of output control circuit of the present invention;
Fig. 6 is the circuit theory diagrams of overcurrent indicating circuit of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Shown in Fig. 1,3,6; a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module 1 and output control circuit 4; also comprise sample circuit 6, comparator 2 and trigger 3; comparator 2 is connected with the output of high-power control module 1 respectively with sample circuit 6; the input of trigger 3 is connected with the output of comparator 2, and the output of trigger 3 is connected with output control circuit 4.The input of trigger 3 also is connected with overcurrent indicating circuit 5.The model of high-power control module is BTS550 or BTS555.Sample circuit 6 is made up of sampling resistor RS.
Shown in Fig. 1,6; a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module 1 and output control circuit 4; also comprise sample circuit 6, comparator 2 and latch; comparator 2 is connected with the output of high-power control module 1 respectively with sample circuit 6; the input of latch is connected with the output of comparator 2, and the output of latch is connected with output control circuit 4.The output of latch also is connected with overcurrent indicating circuit 5.This structure has just changed trigger 3 into latch, and all the other structures are the same, and operation principle is also identical, can play same protection effect.
As shown in Figure 2, be connected with amplifier 7 between the output of the input of comparator 2 and high-power control module 1.This structure is applicable to the high-power control module 1 that does not have the IS function.
As shown in Figure 4, output control circuit 4 is made up of optical coupler IC1 and peripheral circuit thereof.
As shown in Figure 5, output control circuit 4 is made up of triode T1 and peripheral circuit thereof.
Operation principle of the present invention is as follows: (shown in Fig. 3,4,5)
When 1, powering on because IS=0, so comparator IC1A output low level, the automatic power-on reset circuit that C5/R10 forms with the trigger zero clearing (Q=0 ,/Q=1), guarantee that reset circuit is in non-guard mode;
2, when the retarder coil just often, on R56, produces voltage VS from 4 pin IS signals of the high-power control module of BTS55X series, VS＜protection threshold value at this moment, protective circuit does not start;
3, when the retarder coil is short-circuited, VS＞protection threshold value, comparator IC1A exports high level, make trigger IC3A output 1 (Q=1 ,/Q=0), the Q1 conducting, with the control signal short circuit of the input pin of the high-power control module of BTS55X series, the high-power control module of positive closing;
4, close after, IS=0, comparator IC1A output low level, but trigger IC3A enters blocking, unless re-power, perhaps manually IC3A is resetted, otherwise no matter how MCU drives the high-power control module of BTS55X series, output can not connected again;
5, Q5 produces the protective circuit enabling signal simultaneously, is used to notify MCU or display circuit, allows the user know that local or whole short-circuit conditions have appearred in the retarder coil, so that in time handle;
6, meanwhile, other retarder coils that short trouble do not occur still can operate as normal, guarantee driving safety to greatest extent.If there is not this function, unless remove the connection of this map, otherwise automobile can't travel (by locking), just must can travel after the place under repair.
Claims (5)
1, a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module (1) and output control circuit (4); it is characterized in that: also comprise sample circuit (6), comparator (2) and trigger (3); comparator (2) is connected with the output of high-power control module (1) respectively with sample circuit (6); the input of trigger (3) is connected with the output of comparator (2), and the output of trigger (3) is connected with output control circuit (4).
2, a kind of current foldback circuit of controller of current vortex retarder; comprise high-power control module (1) and output control circuit (4); it is characterized in that: also comprise sample circuit (6), comparator (2) and latch; comparator (2) is connected with the output of high-power control module (1) respectively with sample circuit (6); the input of latch is connected with the output of comparator (2), and the output of latch is connected with output control circuit (4).
3, the current foldback circuit of controller of current vortex retarder according to claim 1 and 2 is characterized in that: output control circuit (4) is made up of optical coupler (IC1) and peripheral circuit thereof.
4, the current foldback circuit of controller of current vortex retarder according to claim 1 and 2 is characterized in that: output control circuit (4) is made up of triode (T1) and peripheral circuit thereof.
5, the current foldback circuit of controller of current vortex retarder according to claim 1 and 2 is characterized in that: be connected with amplifier (7) between the output of the input of comparator (2) and high-power control module (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100242710A CN100541958C (en) | 2007-07-26 | 2007-07-26 | The current foldback circuit of controller of current vortex retarder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100242710A CN100541958C (en) | 2007-07-26 | 2007-07-26 | The current foldback circuit of controller of current vortex retarder |
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| Publication Number | Publication Date |
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| CN101106265A CN101106265A (en) | 2008-01-16 |
| CN100541958C true CN100541958C (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100242710A Expired - Fee Related CN100541958C (en) | 2007-07-26 | 2007-07-26 | The current foldback circuit of controller of current vortex retarder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867177A (en) * | 2010-07-02 | 2010-10-20 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520359A (en) * | 2011-12-02 | 2012-06-27 | 苏州冠硕新能源有限公司 | Battery management system and method for short circuit detection and turn-off by adopting same |
| CN105281285A (en) * | 2014-06-06 | 2016-01-27 | 上海航空电器有限公司 | High-power current-limiting and overcurrent protection circuit suitable for test equipment |
| CN105305368B (en) * | 2015-10-26 | 2017-12-08 | 南京航空航天大学 | The hot line current-limiting protection circuit of hot-wire anemometer |
| CN105966252A (en) * | 2016-07-15 | 2016-09-28 | 瑞安市旭晨电子有限公司 | Low speed controller of eddy current retarder |
| CN107093884B (en) * | 2017-06-29 | 2020-09-01 | 贵阳永青仪电科技有限公司 | Intelligent power control system and power control circuit thereof |
| CN110971216B (en) * | 2018-12-06 | 2021-08-17 | 宁德时代新能源科技股份有限公司 | Overcurrent protection circuit |
-
2007
- 2007-07-26 CN CNB2007100242710A patent/CN100541958C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867177A (en) * | 2010-07-02 | 2010-10-20 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
| CN101867177B (en) * | 2010-07-02 | 2013-03-27 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
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| Publication number | Publication date |
|---|---|
| CN101106265A (en) | 2008-01-16 |
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