CN100508362C - A control method of the DC motor - Google Patents
A control method of the DC motor Download PDFInfo
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- CN100508362C CN100508362C CNB2006100255504A CN200610025550A CN100508362C CN 100508362 C CN100508362 C CN 100508362C CN B2006100255504 A CNB2006100255504 A CN B2006100255504A CN 200610025550 A CN200610025550 A CN 200610025550A CN 100508362 C CN100508362 C CN 100508362C
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Abstract
The present invention relates a control method of DC electric motor which is characterized in that: three functional switches 2, 3, 4 are positioned respectively between the magnetic field current regulator and the moment function, at the moment function, and between the armature current regulator and the moment function; an armature current comparing and sequence control function are provided for the comparing of armature current and generating sequence control function, and when the armature current is bigger than a certain threshold current, a method of fixed magnetic field current and an armature adjusting current is adopted and when the armature current is smaller than a certain threshold current, a method of fixed armature current and magnetic field adjusting current is adopted. The advantage of the present invention is that the vibrating problem generated by the electric motor with small load can be overcome and the device can run smoothly.
Description
Technical field
The present invention relates to a kind of control method of DC motor, can be used for the control of the DC motor of mine hoist, belong to automatic control and electric drive technology field.
Background technology
Thereby the purpose to DC motor control in mine hoist is exactly to control the speed of direct current machine by the torque of control DC motor, make elevator by given rate curve in the four-quadrant even running, and stability and rapidity are preferably arranged, to satisfy the requirement that elevator is tried hard to.Make elevator no matter at positive power and negative power state, all can set up moment fast, do not reverse when guaranteeing to start and accurate flat bed when stopping; Generally require speed-regulating range width to be: 1:35, mechanical property is hard, and the assurance elevator under specified positive power and negative power load, all can move with the velocity-stabilization that is less than or equal to 0.3 meter per second respectively.
Mine hoist load variations scope is big, speed-regulating range width, application in mine hoist has the history of decades, generally two kinds of methods are adopted in the control of DC motor, the firstth, the fixed magnetic field electric current, thereby regulate the purpose that armature supply reaches speed governing, as shown in Figure 1, the output of moment function 13 removes to control armature 10 by armature supply adjuster 6 and armature circuits for triggering 8, thereby realize the purpose of field supply secured adjusted armature supply, second kind is the fixed armature electric current, thereby regulate the purpose that field supply reaches speed governing, as shown in Figure 2, the output of moment function 13 is removed controlling magnetic field 9 by field supply adjuster 5 and magnetic field circuits for triggering 7, thereby realizes the purpose in armature supply secured adjusted magnetic field.
The advantage of first method is that equipment investment is little, but commutation is slow, the advantage of second method is a faster system response, but equipment investment is big, along with fast development and mine the improving constantly the production efficiency requirement of power electronic technology, the method that adopts mostly is the fixed magnetic field electric current both at home and abroad, regulate the method for armature supply, but because mine hoist load variations scope is big, motor is easy to generate concussion when little load, influence the even running of equipment, also can cause device damage when serious.
Summary of the invention
The objective of the invention is to invent a kind of concussion that motor produces can overcome little load the time, make the control method of the DC motor of equipment even running.
For realizing above purpose, technical scheme of the present invention provides a kind of control method of DC motor, it is characterized in that, when armature supply adopts the fixed magnetic field electric current during greater than certain threshold current, regulate the method for armature supply, when armature supply adopts fixed armature electric current, the method for regulating field supply during less than described certain threshold current, can be applied in single bridge work, doube bridge parallel operation and doube bridge tandem working, its method is:
The first step: at the moment function place, between field supply adjuster and the moment function, between armature supply adjuster and the moment function, three function diverter switches are set respectively: first switch, second switch, the 3rd switch are used for the switching that armature is regulated and magnetic field is regulated;
Second step a: armature supply is set compares and the sequential control function, be used for the comparison of armature supply and produce the sequential control function, armature supply and in the sequential control function 1 compares with the armature threshold current that is provided with in current ratio, produces logical variable " 1 " or " 0 " that first switch, second switch, the 3rd switch are switched in control;
The 3rd step: compare:
When armature supply during greater than threshold current, current ratio and sequential control function 1 output logic " 0 ", this moment, second switch was in 0 position, field supply is given as fixed value, first switch, the 3rd switch are in 0 position, the output of moment function removes to control armature by armature supply adjuster and armature circuits for triggering, thereby realizes the purpose of field supply secured adjusted armature supply;
When armature supply during less than threshold current, current ratio and sequential control function 1 output logic " 1 ", this moment, second switch was in 1 position, first switch, the 3rd switch are in 1 position, the output of moment function is removed controlling magnetic field by field supply adjuster and magnetic field circuits for triggering, thereby realizes the purpose in armature supply secured adjusted magnetic field.
The threshold value of described armature supply is 100A-300A.
Two kinds of methods that the present invention will use originally combine use, have drawn advantage, have avoided shortcoming, thereby the speed of control direct current machine makes the mine hoist even running.
Advantage of the present invention is the concussion that motor produces in the time of overcoming little load, can make the equipment even running.
Description of drawings
Fig. 1 is former method one control method schematic diagram;
Fig. 2 is former method two control method schematic diagram;
Fig. 3 is a control method schematic diagram of the present invention;
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 3, be control method schematic diagram of the present invention, on the equipment that former method is used, increase current ratio and the diverter switch 2,3,4 in sequential control function 1 and adjusting armature/adjusting magnetic field, by current ratio and sequential control function 1, regulate the diverter switch 2,3,4 in armature/adjusting magnetic field, field supply adjuster 5 and armature supply adjuster 6, magnetic field circuits for triggering 7 and armature circuits for triggering 8, magnetic field major loop 9 and armature major loop 10, armature 11, magnetic field 12, moment function 13 is formed.
A kind of control method of DC motor, when armature supply adopts the fixed magnetic field electric current during greater than certain threshold current, regulate the method for armature supply, when armature supply adopts the fixed armature electric current during less than threshold current, regulate the method for field supply, can be applied in single bridge work, doube bridge parallel operation and doube bridge tandem working, its method is:
The first step: between field supply adjuster 5 and moment function 13, moment function 13 places are provided with three function diverter switches 2,3,4 respectively between armature supply adjuster 6 and the moment function 13, are used for the switching that armature is regulated and magnetic field is regulated;
Second step a: armature supply is set compares and the sequential control function, be used for the comparison of armature supply and produce the sequential control function, armature supply and in the sequential control function 1 compares with the armature threshold current that is provided with in current ratio, produces logical variable " 1 " or " 0 " of control its switch 2,3,4;
The 3rd step: compare:
When armature supply during greater than threshold current, current ratio and sequential control function 1 output logic " 0 ", this moment, switch 3 was in 0 position, field supply is given as fixed value, switch 2,4 is in 0 position, the output of moment function 13 removes to control armature 10 by armature supply adjuster 6 and armature circuits for triggering 8, thereby realizes the purpose of field supply secured adjusted armature supply;
When armature supply during less than threshold current, current ratio and sequential control function 1 output logic " 1 ", this moment, switch 3 was in 1 position, switch 2,4 is in 1 position, the output of moment function 13 is removed controlling magnetic field 9 by field supply adjuster 5 and magnetic field circuits for triggering 7, thereby realizes the purpose in armature supply secured adjusted magnetic field.
The threshold value of armature supply can be set according to the capacity of system and device, and the present invention can be applied in single bridge work, doube bridge parallel operation and doube bridge tandem working.
Claims (2)
1. the control method of a DC motor, it is characterized in that, when armature supply adopts the fixed magnetic field electric current during greater than certain threshold current, regulate the method for armature supply, when armature supply adopts the fixed armature electric current during less than described certain threshold current, regulate the method for field supply, can be applied in single bridge work, doube bridge parallel operation and doube bridge tandem working, its method is:
The first step: locate at moment function (13), between field supply adjuster (5) and the moment function (13), between armature supply adjuster (6) and the moment function (13), three function diverter switches are set respectively: first switch (2), second switch (3), the 3rd switch (4) are used for the switching that armature is regulated and magnetic field is regulated;
Second step a: armature supply is set compares and the sequential control function, be used for the comparison of armature supply and produce the sequential control function, armature supply current ratio and the armature threshold current that is provided with of sequential control function (1) neutralization compare, produce logical variable " 1 " or " 0 " of control switching first switch (2), second switch (3), the 3rd switch (4);
The 3rd step: compare:
When armature supply during greater than threshold current, current ratio and sequential control function (1) output logic " 0 ", second switch this moment (3) is in 0 position, field supply is given as fixed value, first switch (2), the 3rd switch (4) are in 0 position, the output of moment function (13) removes to control armature (10) by armature supply adjuster (6) and armature circuits for triggering (8), thereby realizes the purpose of field supply secured adjusted armature supply;
When armature supply during less than threshold current, current ratio and sequential control function (1) output logic " 1 ", second switch this moment (3) is in 1 position, first switch (2), the 3rd switch (4) are in 1 position, the output of moment function (13) is removed controlling magnetic field (9) by field supply adjuster (5) and magnetic field circuits for triggering (7), thereby realizes the purpose in armature supply secured adjusted magnetic field.
2. the control method of a kind of DC motor according to claim 1 is characterized in that, the threshold value of described armature supply is 100A-300A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100255504A CN100508362C (en) | 2006-04-10 | 2006-04-10 | A control method of the DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100255504A CN100508362C (en) | 2006-04-10 | 2006-04-10 | A control method of the DC motor |
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| Publication Number | Publication Date |
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| CN101056081A CN101056081A (en) | 2007-10-17 |
| CN100508362C true CN100508362C (en) | 2009-07-01 |
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| CNB2006100255504A Active CN100508362C (en) | 2006-04-10 | 2006-04-10 | A control method of the DC motor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103296936B (en) * | 2012-02-23 | 2016-12-14 | 上海北玻镀膜技术工业有限公司 | The system and method that a kind of direct current generator automatic field forcing starts |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720661A (en) * | 1984-01-14 | 1988-01-19 | Yaskawa Electric Mfg. Co., Ltd. | Method and apparatus for controlling reel tension |
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- 2006-04-10 CN CNB2006100255504A patent/CN100508362C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720661A (en) * | 1984-01-14 | 1988-01-19 | Yaskawa Electric Mfg. Co., Ltd. | Method and apparatus for controlling reel tension |
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