CN102480121A - Load overcurrent protection method based on self-recovery function - Google Patents
Load overcurrent protection method based on self-recovery function Download PDFInfo
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- CN102480121A CN102480121A CN2010105596376A CN201010559637A CN102480121A CN 102480121 A CN102480121 A CN 102480121A CN 2010105596376 A CN2010105596376 A CN 2010105596376A CN 201010559637 A CN201010559637 A CN 201010559637A CN 102480121 A CN102480121 A CN 102480121A
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Abstract
The invention relates to a load overflow protection method based on a self-recovery function, wherein the load overflow protection method is characterized by comprising the following steps: 1) collecting load current at intervals according fixed time; 2) determining whether the first time of locked rotor is carried out according to the load current; 3) carrying out overcurrent protection: connecting continuously after power distribution for a motor for 0.5-1 second; 4) determining whether locked rotor is carried out again continuously after connection; and 5) protecting the motor for overcurrent protection when the locked rotor is carried out, and repeating in the mode. The more reasonable control of the load for a complex mechanical device can be realized effectively; and the method is simple, and is convenient for operating personnel to understand and accept.
Description
Technical field
The present invention relates to the intelligent power electronic switch and use, specifically, relate to the load over-current protection method that proposes based on the electric machinery load in the distribution management system of intelligent power electronic switch with complex mechanical structure.
Background technology
The mechanical device of some electric machinery load driving more complicated in the vehicle, owing to mechanical device too complicacy or mechanical structure damping cause mechanical device in running, to be blocked midway too greatly, cause motor rotation blockage; If the time of motor rotation blockage will cause motor to be burnt than length; If but immediately stop to motor to supply power for the protection motor this moment; Let motor quit work, will cause tasks interrupt, make important work failure influence the completion of vehicle task owing to disable motor.
Traditional fuse realizes overcurrent protection through the thermal cut of fuse, and the overcurrent protection of novel semiconductor device intelligence all is behind the load overcurrent, to cut off the load distribution and realize overcurrent protection.The characteristics of these overcurrent protection distribution systems all are behind the load overcurrent, to implement power-off protection immediately; Carry out overcurrent protection immediately in the time of will causing drive motors at stall owing to the card a little of mechanical structure is stifled at the device of some mechanical structure more complicated like this and turn-off the motor load distribution, and make tasks interrupt.And some complex mechanical construction drive motors outage back those blocked stifled mechanical structure and will be got loose, just can make these mechanical device operate as normal so at this moment again drive motors is carried out distribution, and can interruption of work.
Summary of the invention
The objective of the invention is to, the above-mentioned defective to prior art exists provides a kind of load over-current protection method based on self-recovering function, and this method is primarily aimed on the special vehicle drive ratio than the motor load of complicated machinery device.
Can produce mechanical blocking for a certain reason in the mechanical device course of action, thereby cause motor rotation blockage.
A kind of load over-current protection method provided by the invention based on self-recovering function, its improvements are to comprise step:
Judge stall, judge the cyclic process of stall after judging whether to take overcurrent protection and taking overcurrent protection once more.
Provided by the invention first preferably based on the load over-current protection method of self-recovering function, and said judgement stall is gathered load current for pressing Fixed Time Interval; According to the size of load current, judge whether stall for the first time.
Provided by the invention second preferably based on the load over-current protection method of self-recovering function, saidly judges whether to take overcurrent protection to be:
Result according to behind the judgement stall carries out overcurrent protection when stall takes place.
The provided by the invention the 3rd preferably based on the load over-current protection method of self-recovering function, and said overcurrent protection is: the motor distribution is stopped 0.5-1 after second, continue to connect again.
The provided by the invention the 4th preferably based on the load over-current protection method of self-recovering function, and said taking judges that once more stall is after the overcurrent protection:
After continuing to connect, judge whether continuously stall once more, if stall takes place, then carry out overcurrent protection, the protection motor so moves in circles and carries out.
Technique scheme and design thereof:
When stall took place, motor at first cut off the power supply and stops, let the mechanical device that blocks get loose, and then worked on by it to electrical power, if the continuation of then working is eliminated in blocking; If blocking still exists, the overcurrent that then stall is caused is implemented protection, thereby realizes the chance of a retry.
When mechanical blocking causes motor rotation blockage and surpasses preset time, the motor shutoff 0.5-1 second to stall, make the mechanical device of chucking loosening; Then motor is connected distribution once more and continued to detect electric current, if normal, the continuation of then working; If overcurrent still, and surpass preset time, then overcurrent protection in real time.
Load over-current protection method based on twice connection carries out overcurrent protection when monitoring motor rotation blockage, connect motor again after a period of time of delaying time then and work on by mechanical device, thereby reduce the unnecessary protection action; And such protection is fully transparent for operating personnel, because the time that motor has a power failure is very short, operating personnel just feel the completion of task and do not know motor rotation blockage in the implementation of task, whether to occur.
This method can also according to the mechanical structure of load motor and operating characteristic be carried out three times four times and more times distribution is handled from recovering.
Compared with prior art, a kind of load over-current protection method based on self-recovering function provided by the invention has the following advantages:
1, can effectively realize the load of complicated machinery device is more reasonably controlled;
2, this method is simple, is convenient to operating personnel's understanding and acceptance;
3, can reduce the unnecessary protection action;
4, self-recovering function is saved time and manpower, for the user brings convenience;
5, low cost of manufacture has optimistic commercial promise.
Description of drawings
Fig. 1 is: a kind of current curve based on drive motors when work in the load over-current protection method-vehicle Mechatronic Systems of self-recovering function provided by the invention;
Fig. 2 is: a kind of load over-current protection method-motor based on self-recovering function provided by the invention is from recovery and protection current curve sketch map;
Fig. 3 is: the workflow diagram of a kind of load over-current protection method process based on self-recovering function provided by the invention.
Embodiment
Below through embodiment a kind of load over-current protection method based on self-recovering function provided by the invention is done further more detailed explanation;
Embodiment 1
The load over-current protection method based on self-recovering function of present embodiment is as can beappreciated from fig. 1 because the change in resistance of motor institute device driven is bigger.
Motor realizes that for the first time overcurrent cuts off power supply and then connects behind the stall, if this moment still motor rotation blockage cause overcurrent, just motor is cut off to supply power and carries out overcurrent protection.
Motor is as shown in Figure 2 from the signal of recovery and protection current curve, and concrete implementation process is as shown in Figure 3;
May further comprise the steps:
1) presses Fixed Time Interval and gather load current;
2), judge whether stall for the first time according to the size of load current;
3) according to the judged result of step 2,, then carry out overcurrent protection: the motor distribution is stopped 0.5 second continued connect if stall takes place;
4) after the connection, then judge whether continuously stall once more;
5) if stall takes place, then protect motor, carry out overcurrent protection, so circulation is back and forth carried out.
Embodiment 2
The load over-current protection method based on self-recovering function of present embodiment is as can beappreciated from fig. 1 because the change in resistance of motor institute device driven is bigger.
Motor realizes that for the first time overcurrent cuts off power supply and then connects behind the stall, if this moment still motor rotation blockage cause overcurrent, just motor is cut off to supply power and carries out overcurrent protection.
Motor is as shown in Figure 2 from the signal of recovery and protection current curve, and concrete implementation process is as shown in Figure 3;
May further comprise the steps:
1) presses Fixed Time Interval and gather load current;
2), judge whether stall for the first time according to the size of load current;
3) according to the judged result of step 2,, then carry out overcurrent protection: the motor distribution is stopped 1 second continued connect if stall takes place;
4) after the connection, then judge whether continuously stall once more;
5) if stall takes place, then protect motor, carry out overcurrent protection, so circulation is back and forth carried out.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although the present invention has been carried out detailed explanation with reference to the foregoing description; Under the those of ordinary skill in field be to be understood that: the technical staff reads after the present specification still and can specific embodiments of the invention to make amendment or be equal to replacement, does not await the reply within the claim protection range but these modifications or change all break away from application of the present invention.
Claims (5)
1. load over-current protection method based on self-recovering function is characterized in that comprising step:
Judge stall, judge the cyclic process of stall after judging whether to take overcurrent protection and taking overcurrent protection once more.
2. the load over-current protection method based on self-recovering function according to claim 1 is characterized in that said judgement stall does
Press Fixed Time Interval and gather load current; According to the size of load current, judge whether stall for the first time.
3. the load over-current protection method based on self-recovering function according to claim 1 is characterized in that saidly judging whether to take overcurrent protection to be:
Result according to behind the judgement stall carries out overcurrent protection when stall takes place.
4. the load over-current protection method based on self-recovering function according to claim 1 is characterized in that said overcurrent protection is: the motor distribution is stopped 0.5-1 after second, continue to connect again.
5. the load over-current protection method based on self-recovering function according to claim 1 is characterized in that said taking judge that once more stall is after the overcurrent protection:
After continuing to connect, judge whether continuously stall once more, if stall takes place, then carry out overcurrent protection, the protection motor so moves in circles and carries out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010559637.6A CN102480121B (en) | 2010-11-26 | 2010-11-26 | A kind of load overcurrent guard method based on self-recovering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010559637.6A CN102480121B (en) | 2010-11-26 | 2010-11-26 | A kind of load overcurrent guard method based on self-recovering function |
Publications (2)
| Publication Number | Publication Date |
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| CN102480121A true CN102480121A (en) | 2012-05-30 |
| CN102480121B CN102480121B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010559637.6A Expired - Fee Related CN102480121B (en) | 2010-11-26 | 2010-11-26 | A kind of load overcurrent guard method based on self-recovering function |
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| CN (1) | CN102480121B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944487A (en) * | 2014-02-26 | 2014-07-23 | 上虞市冠业电器有限公司 | Current limiting protective circuit for DC motor |
| CN104167716A (en) * | 2014-08-07 | 2014-11-26 | 珠海格力电器股份有限公司 | Protection control method and system of power factor correction circuit |
| CN104953900A (en) * | 2014-03-31 | 2015-09-30 | 海洋王（东莞）照明科技有限公司 | Three-phase DC fan control circuit and three-phase DC fan |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6177774B1 (en) * | 1998-02-27 | 2001-01-23 | Fanuc Limited | Motor controller based on PWM system |
| CN1815871A (en) * | 2005-01-31 | 2006-08-09 | 台达电子工业股份有限公司 | DC brush-less motor driving device without hull assembly |
| CN201179470Y (en) * | 2008-02-26 | 2009-01-14 | 泓首翔电器（深圳）有限公司 | Meat grinder with overload protection function |
| CN101710694A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Car engine cooling fan blocking/overcurrent protection system and method |
-
2010
- 2010-11-26 CN CN201010559637.6A patent/CN102480121B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6177774B1 (en) * | 1998-02-27 | 2001-01-23 | Fanuc Limited | Motor controller based on PWM system |
| CN1815871A (en) * | 2005-01-31 | 2006-08-09 | 台达电子工业股份有限公司 | DC brush-less motor driving device without hull assembly |
| CN201179470Y (en) * | 2008-02-26 | 2009-01-14 | 泓首翔电器（深圳）有限公司 | Meat grinder with overload protection function |
| CN101710694A (en) * | 2009-11-26 | 2010-05-19 | 上海大学 | Car engine cooling fan blocking/overcurrent protection system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944487A (en) * | 2014-02-26 | 2014-07-23 | 上虞市冠业电器有限公司 | Current limiting protective circuit for DC motor |
| CN104953900A (en) * | 2014-03-31 | 2015-09-30 | 海洋王（东莞）照明科技有限公司 | Three-phase DC fan control circuit and three-phase DC fan |
| CN104167716A (en) * | 2014-08-07 | 2014-11-26 | 珠海格力电器股份有限公司 | Protection control method and system of power factor correction circuit |
| CN104167716B (en) * | 2014-08-07 | 2017-03-22 | 珠海格力电器股份有限公司 | Protection control method and system of power factor correction circuit |
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| Publication number | Publication date |
|---|---|
| CN102480121B (en) | 2016-03-30 |
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Granted publication date: 20160330 Termination date: 20171126 |