CN201118490Y - High-voltage electromotor 6-pole three-phase self-excitation magnetic control soft start device - Google Patents
High-voltage electromotor 6-pole three-phase self-excitation magnetic control soft start device Download PDFInfo
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- CN201118490Y CN201118490Y CNU2007200883062U CN200720088306U CN201118490Y CN 201118490 Y CN201118490 Y CN 201118490Y CN U2007200883062 U CNU2007200883062 U CN U2007200883062U CN 200720088306 U CN200720088306 U CN 200720088306U CN 201118490 Y CN201118490 Y CN 201118490Y
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Abstract
A high-voltage motor six-column three-phase self-excitation magnetic-control soft-start device relates to the equipment for starter motors and comprises three groups of magnetic cores and windings; each group of magnetic cores is composed of a left core column 1 and a right core column 2; a first coil 3 and a second coil 4 are wound on the left core column 1; a third coil 5 and a fourth coil 6 are wound on the right core column 2; the device is also provided with a thyristor T1 whose anode is connected on the node between the fourth coil 6 and the first coil 3 in parallel; the cathode of the thyristor T1 is connected on the node between the second coil 4 and the third coil 5 in parallel; the control pole of the thyristor T1 is connected with an industrial control computer; the other end of the first coil 3 and the other end of the third coil 5 are connected on any phase E of a motor stator coil in parallel. The high-voltage motor six-column three-phase self-excitation magnetic-control soft-start device enables smooth change of the resistance of high-voltage AC windings and has the advantages of small size, stable start-up performance, large adjusting range, fast response and long service life, which almost has no magnetic leakage.
Description
Technical field
The utility model relates to a kind of equipment that is used for starting motor.Relate in particular to a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter.
Background technology
At present, domestic high-voltage motor mainly adopts water resistance as starting device.Mainly there is following shortcoming in the water resistance starting device, at first device volume is big, starting performance is unstable, influenced by ambient temperature big, can not start continuously, easily boil when starting continuously, next poor stability, Installation and Debugging and troublesome maintenance, need regularly add water, useful life is short, has only 3-5.Water resistance is conducting medium with the aqueous solution, and above-mentioned shortcoming is difficult to solve.Chinese patent notification number: 93232744.3; the day for announcing: on October 12nd, 1994; utility model title " magnet controlled asynchronous machine soft starter "; a kind of technical scheme that comprises performance element, trip circuit, protective circuit and control circuit has been proposed; performance element is no reaction type magnetic amplifier; make motor starting voltage can be automatic, stepless by certain slope from 220V, rise to 380 full voltages smoothly, satisfied the needs that starting torque and voltage increase synchronously.But this technical scheme control winding and AC Windings branch are arranged, and need add jumbo field power supply, the leakage field serious interference, response speed is slower, the impedance adjustment scope is little, and volume is bigger, can only be applicable to the starting of low-tension motor, can't satisfy high-tension electricity machine width impedance adjustment, fast the requirement of response, self-excitation type soft start.
Summary of the invention
The purpose of this utility model is need add field power supply at prior art, leakage field is serious, the impedance adjustment scope is little, bulky defective and deficiency, propose a kind of simple in structure, volume is little, and Magnetic Shielding Effectiveness is good, is suitable for the high-voltage motor six pillar three-phases self-excitation magnetic control soft starter that the high-voltage motor soft start needs.
The purpose of this utility model realizes in the following manner: a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter, comprise conducting magnet core and coil windings, described conducting magnet core is provided with three groups of magnetic cores and coil windings, the last yoke of conducting magnet core and following yoke are arranged on the two ends up and down of three core assembly posts, each group magnetic core is formed by left stem stem and right stem stem, on left stem stem, be wound with first coil and second coil, be wound with tertiary coil and the 4th coil on the right stem stem, one end of second coil and an end of the 4th coil are connected in parallel on the power supply, the other end of second coil connects tertiary coil, the other end of the 4th coil connects first coil, there is its anode of a thyristor to be connected in parallel on the 4th coil and the node that first coil is connected, its negative electrode is connected in parallel on second coil and the node that tertiary coil is connected, the control utmost point of thyristor is connected with industrial computer, is connected on one of coil of stator of motor after the other end parallel connection of the other end of first coil and tertiary coil and goes up mutually.
In each group magnetic core described in the utility model and the winding, there is the positive pole of a diode to be connected in parallel on the 4th coil and the node that first coil is connected, the negative pole of diode is connected in parallel on second coil and the node that tertiary coil is connected, there is the negative electrode of one second thyristor also to be connected in parallel on this node, the anode of second thyristor is connected in parallel on the 4th coil and the node that first coil is connected, and the control utmost point of second thyristor is connected with industrial computer.
In each group magnetic core and winding described in the utility model, first coil, second coil, tertiary coil and the 4th coil around to and equal turn numbers.
In each group magnetic core described in the utility model and the winding, left side stem stem and right stem stem are cylindrical or elliptical cylinder-shape or rectangle, the sectional area of two stem stems equates that first coil that is wound with respectively, second coil and tertiary coil, the 4th coil are that levels is arranged or ectonexine is arranged on two stem stems.
The length that goes up yoke and following yoke described in the utility model is more than or equal to the centre-to-centre spacing of three core assembly posts and the external diameter sum of a coil, and the width of last yoke and following yoke is more than or equal to left the stem stem extremely centre-to-centre spacing of right stem stem and the external diameter sum of a coil.
Three groups of magnetic cores described in the utility model are connected with three of coil of stator of motor with after coil windings is connected by star-like or triangular form again.
Therefore, compared with prior art the utlity model has following tangible advantage:
1. be kernel control chip with the low-voltage thyristor, the size by direct current in the industrial computer control thyristor change coil windings changes the iron core magnetic permeability, thereby smoothly changes the impedance of high-voltage alternating winding, realizes the soft start of motor.
2. the AC and DC winding is same coil, does not need to add field power supply, is the close coupling structure, and the AC impedance adjustable range is bigger, and response speed is faster.
3. can accurately lock in the starting process, device volume is little, has only with 1/2 of capacity water resistance, and starting performance is stable, and is not influenced by ambient temperature, can start continuously, and Installation and Debugging are simple, and are non-maintaining, reliability height, long service life.
4. go up the sectional dimension of the face size of yoke, following yoke, have magnetic screening action preferably, basic magnetic leakage free phenomenon greater than coil.
Description of drawings
Fig. 1 is the structural representation of the utility model conducting magnet core and coil windings;
Fig. 2 is the B-B cutaway view among Fig. 1;
Fig. 3 is the A-A cutaway view among Fig. 1;
Fig. 4 is the connection diagram of one group of coil windings in the utility model.
Among the figure, left stem stem 1, right stem stem 2, first coil 3, second coil 4, tertiary coil 5, the 4th coil 6, last yoke 7, following yoke 8.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is described in further detail:
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter, comprise conducting magnet core and coil windings, described conducting magnet core is provided with three groups of magnetic cores and coil windings, the two ends up and down that the last yoke 7 of conducting magnet core and following yoke 8 are arranged on three core assembly posts, each group magnetic core is formed by left stem stem 1 and right stem stem 2, on left stem stem 1, be wound with first coil 3 and second coil 4, be wound with tertiary coil 5 and the 4th coil 6 on the right stem stem 2, one end of one end of second coil 4 and the 4th coil 6 is connected in parallel on the power supply X, and the other end that the other end of second coil 4 connects tertiary coil 5, the four coils 6 connects first coil 3, there is its anode of thyristor T1 to be connected in parallel on the 4th coil 6 and the node that first coil 3 is connected, its negative electrode is connected in parallel on second coil 4 and the node that tertiary coil 5 is connected, and the control utmost point of thyristor T1 is connected with industrial computer, is connected on mutually on the E of coil of stator of motor after the other end parallel connection of the other end of first coil 3 and tertiary coil 5.Thyristor T1 is a low-voltage thyristor.Three groups of magnetic cores on the utility model and coil windings, be connected on the triple line of high-voltage motor, during electric motor starting, four coils on each group magnetic core are as the high-voltage alternating winding, provide normal starting current mutually to one of motor, but meanwhile industrial computer is to thyristor T1 output dc control signal, thyristor T1 conducting, input dc power stream in first coil 3 and the 4th coil 6, make the change of flux in left stem stem 1 and the right stem stem 2, thereby cause changing of each coil inside voltage, the starting voltage that motor one is gone up mutually changes.Three groups of magnetic cores are with after coil windings is connected by star-like or triangular form, be connected with three of coil of stator of motor again, three groups of magnetic cores and coil windings are worked simultaneously, can smoothly change the induction reactance of this device by the angle of flow that changes thyristor T1, realize the self-excitation type soft start of motor.
Be the adjustable range of expand cooperative exchanges impedance, further reduce the load of thyristor T1, can organize at each increases by the second thyristor T2 in the coil windings.Promptly there is the positive pole of a diode D1 to be connected in parallel on the 4th coil 6 and the node that first coil 3 is connected, the negative pole of diode D1 is connected in parallel on second coil 4 and the node that tertiary coil 5 is connected, there is the negative electrode of one second thyristor T2 also to be connected in parallel on this node, the anode of the second thyristor T2 is connected in parallel on the 4th coil 6 and the node that first coil 3 is connected, and the control utmost point of the second thyristor T2 is connected with industrial computer.Thyristor T1 and the equal low-voltage thyristor of the second thyristor T2 and by industrial computer control, the amplitude range that direct current is regulated in each coil windings is bigger, and response speed is faster.
Be the convenience of regulation and control, in each group coil windings first coil 3, second coil 4, tertiary coil 5 and the 4th coil 6 around to and equal turn numbers.Described left stem stem 1 and right stem stem 2 are cylindrical or elliptical cylinder-shape or rectangle, and the sectional area of two stem stems equates that first coil 3, second coil 4 and the tertiary coil 5 that is wound with respectively, the 4th coil 6 are arranged for levels or the ectonexine layout on two stem stems.
Referring to Fig. 1, Fig. 2, Fig. 3, the described external diameter sum that goes up the length of yoke 7 and following yoke 8 more than or equal to coil on left stem stem 1 and the right stem stem 2, the width of last yoke 7 and following yoke 8 is more than or equal to the external diameter of coil on left stem stem 1 or the right stem stem 2.All coils is avoided leakage field to disturb by last yoke 7, yoke 8 semi-surroundings covering down.
The utility model device is tested on certain 6000kW/10kV motor, 2.8 times of rated current are set and accurately locked to starting current, 32 seconds time, starting process is level and smooth, and starting performance is stable, the reliability height, can start continuously, Installation and Debugging simply also can realize non-maintaining, can reach its useful life about 25 years through calculating, volume only accounts for capacity and accounts for 1/2 of water resistance device, is the desirable regeneration product of water resistance starting device.
Claims (6)
1. high-voltage motor six pillar three-phases self-excitation magnetic control soft starter, comprise conducting magnet core and coil windings, it is characterized in that: described conducting magnet core is provided with three groups of magnetic cores and coil windings, the last yoke (7) of conducting magnet core and following yoke (8) are arranged on the two ends up and down of three core assembly posts, each group magnetic core is formed by left stem stem (1) and right stem stem (2), on left stem stem (1), be wound with first coil (3) and second coil (4), be wound with tertiary coil (5) and the 4th coil (6) on the right stem stem (2), one end of one end of second coil (4) and the 4th coil (6) is connected in parallel on the power supply (X), the other end of second coil (4) connects tertiary coil (5), the other end of the 4th coil (6) connects first coil (3), there is its anode of a thyristor (T1) to be connected in parallel on the 4th coil (6) and the node that first coil (3) is connected, its negative electrode is connected in parallel on second coil (4) and the node that tertiary coil (5) is connected, the control utmost point of thyristor (T1) is connected with industrial computer, is connected on mutually on (E) of coil of stator of motor after the other end parallel connection of the other end of first coil (3) and tertiary coil (5).
2. a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter according to claim 1, it is characterized in that: in described each group magnetic core and the winding, there is the positive pole of a diode (D1) to be connected in parallel on the 4th coil (6) and the node that first coil (3) is connected, the negative pole of diode (D1) is connected in parallel on second coil (4) and the node that tertiary coil (5) is connected, there is the negative electrode of one second thyristor (T2) also to be connected in parallel on this node, the anode of second thyristor (T2) is connected in parallel on the 4th coil (6) and the node that first coil (3) is connected, and the control utmost point of second thyristor (T2) is connected with industrial computer.
3. a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter according to claim 1 and 2, it is characterized in that: in described each group magnetic core and coil windings, first coil (3), second coil (4), tertiary coil (5) and the 4th coil (6) around to and equal turn numbers.
4. a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter according to claim 1, it is characterized in that: in described each group magnetic core and the coil windings, left side stem stem (1) and right stem stem (2) are cylindrical or elliptical cylinder-shape or rectangle, the sectional area of two stem stems equates that first coil (3) that is wound with respectively, second coil (4) and tertiary coil (5), the 4th coil (6) are arranged for levels or the ectonexine layout on two stem stems.
5. a kind of high-voltage motor six pillar three-phases self-excitation magnetic control soft starter according to claim 1, it is characterized in that: the described length that goes up yoke (7) and following yoke (8) is more than or equal to the centre-to-centre spacing of three core assembly posts and the external diameter sum of a coil, and the width of last yoke (7) and following yoke (8) is more than or equal to left stem stem (1) the extremely centre-to-centre spacing of right stem stem (2) and the external diameter sum of a coil.
6. a kind of high-voltage motor six pillar three-phases according to claim 1 self-excitation magnetic control soft starter is characterized in that: described three groups of magnetic cores are connected with three of coil of stator of motor with after coil windings is connected by star-like or triangular form again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200883062U CN201118490Y (en) | 2007-11-20 | 2007-11-20 | High-voltage electromotor 6-pole three-phase self-excitation magnetic control soft start device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200883062U CN201118490Y (en) | 2007-11-20 | 2007-11-20 | High-voltage electromotor 6-pole three-phase self-excitation magnetic control soft start device |
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| CN201118490Y true CN201118490Y (en) | 2008-09-17 |
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| CNU2007200883062U Expired - Lifetime CN201118490Y (en) | 2007-11-20 | 2007-11-20 | High-voltage electromotor 6-pole three-phase self-excitation magnetic control soft start device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021921A (en) * | 2014-05-27 | 2014-09-03 | 华为技术有限公司 | Coupling inductor and power converter |
-
2007
- 2007-11-20 CN CNU2007200883062U patent/CN201118490Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021921A (en) * | 2014-05-27 | 2014-09-03 | 华为技术有限公司 | Coupling inductor and power converter |
| US20170076849A1 (en) * | 2014-05-27 | 2017-03-16 | Huawei Technologies Co., Ltd. | Coupled Inductor and Power Converter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080917 |