CN103507647A - Double-resistance-grid control method - Google Patents
Double-resistance-grid control method Download PDFInfo
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- CN103507647A CN103507647A CN201310460431.1A CN201310460431A CN103507647A CN 103507647 A CN103507647 A CN 103507647A CN 201310460431 A CN201310460431 A CN 201310460431A CN 103507647 A CN103507647 A CN 103507647A
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- resistance grid
- resistance
- branch road
- grid
- control method
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Abstract
The invention discloses a double-resistance-grid control method, and belongs to the field of mechanical control. According to the double-resistance-grid control method, a first resistance grid 2 and a second resistance grid 3 which are arranged on a bus 1 are included. The double-resistance-grid control method comprises the steps that whether the first resistance grid 2 and/or the second resistance grid 3 need to be opened or not is calculated by the utilization of a control algorithm through the required power of the bus 1; when the first resistance grid 2 or the second resistance grid 3 breaks down, the second resistance grid 3 or the first resistance grid 2 is opened independently. According to the technical scheme, the double resistance grids are used alternately, a circuit branch is prevented from being switched frequently, a peak caused when the circuit branch is switched frequently is avoided, and when one resistance grid breaks down, an exterior power requirement is converted into power parameters which can be provided by a single resistance grid, the resistance grid can continue braking, and then a driver can drive a vehicle into a garage to be maintained.
Description
Technical field
The invention belongs to mechanical equipment control field, relate to a kind of control method, relate in particular to a kind of pair of cabinet resistance grid control method.
Background technology
At present, electric wheel mining truck adopts following brake mode mostly: first open the branch road containing blower fan, open again adjustable branch road to regulate busbar voltage, when dutycycle is opened another uncontrollable branch road during to certain value, and allow adjustable branch road continue adjusting busbar voltage.
In prior art, have and use single resistance grid braking, for the electric wheel mining truck braking method of braking at a high speed.But this method exists following technical matters:
1) once resistance grid fault can not brake.
2) open all the time on band blower fan one road, so will affect the life-span for a long time.
3) frequent switch.
4) accumulation of heat is in confused situation.
5) while switching, produce spike.
Summary of the invention
In view of this, the present invention is by being used alternatingly two cabinet resistance grids, avoided the frequent switching of branch road and switched producing peak, and when a resistance grid et out of order, convert extraneous power demand to single cabinet available power parameter, make resistance grid can continue braking, so that the maintenance of driver Jiang Chekairu garage.
For achieving the above object, concrete technical scheme is as follows:
A kind of pair of cabinet resistance grid control method is provided, is applied in the braking procedure of mine equipment vehicle, described pair of cabinet resistance grid comprises the first resistance grid and the second resistance grid of being located on bus, and described pair of cabinet resistance grid control method comprises:
Step 1, obtains braking bus power demand;
Step 2, whether by bus power demand, utilize control algorithm to calculate needs to open the first resistance grid and/or the second resistance grid;
Step 3, opens the first resistance grid and/or the second resistance grid according to the result of calculation of step 2, and returns step 1;
Step 4, when described the first resistance grid or the second resistance grid et out of order, opens separately the second resistance grid or the first resistance grid.
Preferably, in described step 2, by energy meter algorithm, calculate whether need to open the first resistance grid and/or the second resistance grid.
Preferably, described the first resistance grid comprises the first blower fan branch road and the first adjustable branch road, described the second resistance grid comprises the second blower fan branch road and the second adjustable branch road, in described the first blower fan branch road, the first adjustable branch road, the second blower fan branch road and the second adjustable branch road, is equipped with resistor chain.
Preferably, in described step 2, utilize control algorithm to calculate and whether need to open the first blower fan branch road, the first adjustable branch road, the second blower fan branch road and the second adjustable branch road.
Preferably, in described step 2, be also included in the Near The Critical Point of changing unlatching or closing stagnant ring is set.
Preferably, in described step 2, by odd, calculate whether need to open the first resistance grid and/or the second resistance grid.
Preferably, in described step 2, by thermometry, calculate whether need to open the first resistance grid and/or the second resistance grid.
With respect to prior art, the advantage of technical scheme of the present invention has:
1, when a resistance grid fault, another resistance grid still can be worked, and maintains mine truck and drives towards garage maintenance.
2) be used alternatingly two cabinet resistance grids, avoid the frequent switching of branch road.
3) while avoiding branch road to switch, produce spike.
4) can calculate cooling fan in service and stop accumulation of heat situation in rear resistance grid.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the embodiment of the present invention.
Wherein, 1 is that bus, 2 is that the first resistance grid, 3 is that the second resistance grid, 4 is that blower fan, 5 is that chopper, 6 is flywheel diode.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
A kind of pair of cabinet resistance grid control method of embodiments of the invention, is applied in the braking procedure of mine equipment vehicle as shown in Figure 1, and described pair of cabinet resistance grid comprises the first resistance grid 2 and the second resistance grid 3 of being located on bus 1.Two cabinet resistance grid control methods comprise:
Step 1, obtains braking bus 1 power demand;
Step 2, whether by bus 1 power demand, utilize control algorithm to calculate needs to open the first resistance grid 2 and/or the second resistance grid 3;
Step 3, opens the first resistance grid 2 and/or the second resistance grid 3 according to the result of calculation of step 2, and returns step 1;
Step 4, when the first resistance grid 2 or the second resistance grid 3 et out of order, opens separately the second resistance grid 3 or the first resistance grid 2.
Embodiments of the invention are by being used alternatingly two cabinet resistance grids, avoided the frequent switching of branch road and switched producing peak, and when a resistance grid et out of order, convert extraneous power demand to single cabinet available power parameter, make resistance grid can continue braking, so that the maintenance of driver Jiang Chekairu garage.
As shown in fig. 1, in an embodiment of the present invention, each resistance grid is comprised of cooling blower 4, unadjustable branch road, adjustable branch road.On each branch road, be equipped with chopper 5 and flywheel diode 6.Resistor chain has A, B, C and D, and has A channel, B passage, C-channel, 4 passages of D passage.Cooling blower is connected with resistor chain D with resistor chain B.
Preferably two cabinet resistance grids reach the object being used alternatingly by control algorithm, be preferably odd or thermometry or energy meter algorithm; At Near The Critical Point, stagnant ring is set, avoids the frequent switch of branch road.By thermal model, calculate cooling fan in service and stop accumulation of heat situation in rear resistance grid; While using spike method of offset to avoid switching, produce spike, keep busbar voltage steady.
As shown in fig. 1, establishing bus power demand is P, and B passage rating horsepower is PB, and stagnant ring is Band, and A channel and D passage rating horsepower are PA and PD.
Ascent stage: when P=0, close all passages; When 0 < P≤PB, B passage is opened; When PB < P < PB * 2, open A channel; When PB * 2 < P < PB * (2+Band), maintain the original state; When P >=PB * (2+Band), open D passage and C-channel.
Decline stage: when P >=PB * (2+Band), open A channel, B passage, C-channel and D passage; As PB * 2 < P < PB * (2+Band), maintain the original state; When PB < P < PB * 2, close A channel and B passage; When 0 < P≤PB, C-channel is closed; When P=0, D pathway closure.
In addition,, if preferably temperature is higher, can open in advance B passage and D passage containing blower fan;
If containing blower fan branch road et out of order, can only close this resistance grid; If not containing blower fan branch road et out of order, can only close this branch road.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (7)
1. two cabinet resistance grid control methods, are applied in the braking procedure of mine equipment vehicle, and described pair of cabinet resistance grid comprises the first resistance grid and the second resistance grid of being located on bus, it is characterized in that, described pair of cabinet resistance grid control method comprises:
Step 1, obtains braking bus power demand;
Step 2, whether by bus power demand, utilize control algorithm to calculate needs to open the first resistance grid and/or the second resistance grid;
Step 3, opens the first resistance grid and/or the second resistance grid according to the result of calculation of step 2, and returns step 1;
Step 4, when described the first resistance grid or the second resistance grid et out of order, opens separately the second resistance grid or the first resistance grid.
2. as claimed in claim 1 pair of cabinet resistance grid control method, is characterized in that, in described step 2, by energy meter algorithm, calculates whether need to open the first resistance grid and/or the second resistance grid.
3. as claimed in claim 2 pair of cabinet resistance grid control method, it is characterized in that, described the first resistance grid comprises the first blower fan branch road and the first adjustable branch road, described the second resistance grid comprises the second blower fan branch road and the second adjustable branch road, in described the first blower fan branch road, the first adjustable branch road, the second blower fan branch road and the second adjustable branch road, is equipped with resistor chain.
4. as claimed in claim 3 pair of cabinet resistance grid control method, is characterized in that, whether in described step 2, utilize control algorithm to calculate needs to open the first blower fan branch road, the first adjustable branch road, the second blower fan branch road and the second adjustable branch road.
5. as claimed in claim 4 pair of cabinet resistance grid control method, is characterized in that, is also included in the Near The Critical Point of changing unlatching or closing stagnant ring is set in described step 2.
6. as claimed in claim 1 pair of cabinet resistance grid control method, is characterized in that, in described step 2, by odd, calculates whether need to open the first resistance grid and/or the second resistance grid.
7. as claimed in claim 1 pair of cabinet resistance grid control method, is characterized in that, in described step 2, by thermometry, calculates whether need to open the first resistance grid and/or the second resistance grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310460431.1A CN103507647B (en) | 2013-09-29 | 2013-09-29 | A kind of two cabinet resistance grid control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310460431.1A CN103507647B (en) | 2013-09-29 | 2013-09-29 | A kind of two cabinet resistance grid control method |
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| CN103507647A true CN103507647A (en) | 2014-01-15 |
| CN103507647B CN103507647B (en) | 2015-12-23 |
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| CN201310460431.1A Expired - Fee Related CN103507647B (en) | 2013-09-29 | 2013-09-29 | A kind of two cabinet resistance grid control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1674326A2 (en) * | 2004-12-21 | 2006-06-28 | Vacon Oyj | Braking chopper |
| US20080315805A1 (en) * | 2007-06-21 | 2008-12-25 | Ajith Kuttannair Kumar | Chopper circuit topologies for adapting an electrical braking system in a traction vehicle |
| CN101687506A (en) * | 2007-02-06 | 2010-03-31 | 通用电气公司 | Hybrid energy power management system and method |
| CN102582446A (en) * | 2012-03-09 | 2012-07-18 | 上海三一重机有限公司 | Wide voltage input switching circuit of resistance grid cooling fan |
| CN102991360A (en) * | 2012-12-28 | 2013-03-27 | 上海三一重机有限公司 | Electric braking control method for electrically-driven tramcar |
-
2013
- 2013-09-29 CN CN201310460431.1A patent/CN103507647B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1674326A2 (en) * | 2004-12-21 | 2006-06-28 | Vacon Oyj | Braking chopper |
| CN101687506A (en) * | 2007-02-06 | 2010-03-31 | 通用电气公司 | Hybrid energy power management system and method |
| US20080315805A1 (en) * | 2007-06-21 | 2008-12-25 | Ajith Kuttannair Kumar | Chopper circuit topologies for adapting an electrical braking system in a traction vehicle |
| CN102582446A (en) * | 2012-03-09 | 2012-07-18 | 上海三一重机有限公司 | Wide voltage input switching circuit of resistance grid cooling fan |
| CN102991360A (en) * | 2012-12-28 | 2013-03-27 | 上海三一重机有限公司 | Electric braking control method for electrically-driven tramcar |
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| CN103507647B (en) | 2015-12-23 |
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Effective date of registration: 20160119 Address after: 201400 room 1, building 19, 200 Lang Lu, Shanghai, Fengxian District Patentee after: SANYI ROBOT TECHNOLOGY CO., LTD. Address before: 201306 Pudong New Area Port Industrial Park, Shanghai, No. two port road, block A, 318 Patentee before: Shanghai Sany Heavy Machinery Co., Ltd. |
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Granted publication date: 20151223 Termination date: 20160929 |
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