CN107781338B - Excitation type eddy current damper and method for continuously adjusting damping coefficient - Google Patents
Excitation type eddy current damper and method for continuously adjusting damping coefficient Download PDFInfo
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- CN107781338B CN107781338B CN201610727157.3A CN201610727157A CN107781338B CN 107781338 B CN107781338 B CN 107781338B CN 201610727157 A CN201610727157 A CN 201610727157A CN 107781338 B CN107781338 B CN 107781338B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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- Fluid-Damping Devices (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention relates to an excitation type eddy current damper and a method for continuously adjusting a damping coefficient, wherein a stator iron core (2) is formed by laminating stator punching sheets, 12 slots are uniformly distributed on the stator iron core, an excitation winding (3) is arranged in each slot, the excitation winding (3) adopts a centralized winding mode and is sequentially arranged in a forward direction and a reverse direction from slot to slot, six pairs of N, S-pole induction magnetic fields are formed in a 360-degree range of the excircle of the whole stator iron core (2) after the excitation winding (3) is electrified with excitation current, and the electrical angle occupied by each N pole and each S pole is 30 degrees; the inner circle of the stator core (2) is connected with a fixed shaft of the damper, and a gap between the outer circle of the stator core (2) and the inner circle of the magnet yoke of the rotor (1) is a working air gap. The invention improves the working mode that the damping coefficient of the traditional eddy current damper can not be adjusted or can only be stopped to adjust the structure but can not be closed-loop controlled in real time.
Description
Technical Field
The invention relates to a design technology of an eddy current damper capable of continuously and real-timely adjusting a damping coefficient.
Background
In the conventional eddy current damper, because the hard magnetic material is used to generate a fixed magnetic field, the eddy current effect generated in the conductor is only related to the rotation speed of the conductor, so that the damping coefficient is fixed, and the damping force is necessarily generated as long as the conductor rotates. In some occasions where the damping coefficient needs to be adjusted in real time, especially in working occasions where the damping force output by the damper is zero when the damper does not work, the damper with the fixed damping coefficient cannot meet the requirement of system work.
The excitation type eddy current damper controls the size of exciting current in an excitation winding by changing the amplitude of exciting voltage, and adjusts the size of a sensing magnetic field in a working air gap, so that the size of eddy current in the damper is changed to realize continuous adjustment and real-time closed-loop control of a damping coefficient from zero, and the damper has the characteristics of electromagnetic interference resistance, high resolution, simple structure and strong environmental adaptability.
Disclosure of Invention
The purpose of the invention is: the design technology of the excitation type eddy current damper is provided.
The technical scheme of the invention is as follows: an excited eddy current damper comprising: the rotor comprises a rotor 1, a stator core 2 and an excitation winding 3, wherein the rotor 1 is composed of a damping cup and a magnetic yoke, the damping cup is made of a low-resistance copper alloy material, and the magnetic yoke is made of a high-saturation soft magnetic alloy material; the stator core 2 is formed by laminating stator punching sheets made of high-saturation soft magnetic alloy materials, 12 slots are uniformly distributed on the stator core 2, an excitation winding 3 is arranged in each slot, the excitation winding 3 is arranged in a centralized winding mode in a forward direction and a reverse direction in sequence from slot to slot, six pairs of N, S-pole induction magnetic fields are formed in the 360-degree range of the outer circle of the whole stator core 2 after the excitation winding 3 is electrified with excitation current, and the electrical angle occupied by each N pole and each S pole is 30 degrees; the inner circle of the stator core 2 is connected with the fixed shaft of the damper, a gap between the outer circle of the stator core 2 and the inner circle of the magnet yoke of the rotor 1 is a working air gap, and the outer circle of the rotor 1 is connected with the output shaft of the damper.
A method for realizing continuous adjustment of a damping coefficient of an eddy current damper is characterized by comprising the following steps: the eddy current damper as claimed in claim 1, wherein the exciting winding 3 is installed in the eddy current damper, the exciting winding 3 has 12 coils, and is embedded in the stator core 2 in a concentrated winding manner, the 1 st coil is wound on the 1 st tooth of the stator core 2, the 2 nd coil is wound on the 2 nd tooth in a reverse direction, the 3 rd coil is wound in a same direction as the first coil, and so on, until the 12 th coil is wound on the 12 th tooth in a reverse direction.
According to the performance index requirement of the damper, the parallel connection, series connection and series/parallel connection of the coils can be realized by changing the head and tail connection modes of 12 coils, so that the flexible adjustment of various ranges of damping coefficients can be realized under the same external input excitation voltage. Aiming at each wiring mode, the size of the exciting current in the exciting winding 3 is controlled by changing the amplitude of the exciting voltage, and the size of the induction magnetic field in the working air gap is adjusted, so that the size of the eddy current in the damper is changed to realize the continuous adjustment and real-time closed-loop control of the damping coefficient from zero.
The invention has the advantages that: the excitation type eddy current damper controls the current in the excitation winding by changing the amplitude of the excitation voltage, and adjusts the magnitude of the induction magnetic field in the working air gap, thereby changing the magnitude of the eddy current in the damping cup to realize the aim of continuously adjusting the damping coefficient from zero, simultaneously realizing the real-time closed-loop control of the damping coefficient under the condition of not changing the structure of the damper body, and improving the working mode that the damping coefficient of the traditional eddy current damper can not be adjusted or can only be stopped to carry out structural adjustment but can not be controlled in real time in a closed-loop manner. The damping coefficient of the excitation type eddy current damper is in linear relation with the magnitude of the excitation current.
Drawings
FIG. 1 is a schematic view of an excitation eddy current damper installation;
FIG. 2 is a structural view of an excitation type eddy current damper;
FIG. 3 is a series connection of the field windings;
FIG. 4 is a parallel connection of field windings;
FIG. 5 shows a series/parallel hybrid connection mode I of the excitation winding;
FIG. 6 shows a series/parallel hybrid connection mode II of the field winding;
FIG. 7 shows a series/parallel hybrid connection of the field winding;
FIG. 8 shows a series/parallel hybrid connection mode IV of the excitation winding;
Detailed Description
The exciting winding is provided with 12 coils in total, the coils are embedded in the stator core in a concentrated winding mode, and the number of turns and the wire diameter of the enameled wire of each coil are determined according to the requirements of the slot area and the damping coefficient of the stator core;
the 1 st coil is wound on the 1 st tooth of the stator core, the 2 nd coil is wound on the 2 nd tooth in the opposite direction, the 3 rd coil is wound in the same direction as the 1 st coil, and so on until the 12 th coil is wound on the l2 th tooth in the opposite direction.
As shown in fig. 3, the excitation winding 3 is connected in series by: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the primary side of the 5 th coil, and the like until the secondary side of the 12 th coil is connected with the negative pole of the excitation voltage;
as shown in fig. 4, the parallel connection mode of the excitation windings 3 is as follows: the primary side of each coil is connected with the positive pole of the excitation voltage, and the secondary side of each coil is connected with the negative pole of the excitation voltage; under the condition that the same excitation voltage and the number of turns of the coil are not changed, the excitation current generated by the parallel connection mode is 12 times of the excitation current generated by the series connection mode, so that the damping coefficient of the parallel connection mode is 12 times of the damping coefficient of the series connection mode;
as shown in fig. 5, the series/parallel hybrid connection mode i of the excitation winding 3 is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, the secondary side of the 1 st coil is connected with the secondary side of the 2 nd coil, and the primary side of the 2 nd coil is connected with the negative pole of the excitation voltage; repeating the wiring modes of the 1 st coil and the 2 nd coil for the 3 rd coil and the 4 th coil, and the like until the wiring modes of the 1 st coil and the 2 nd coil are repeated for the 11 th coil and the 12 th coil; under the condition that the same excitation voltage and the number of turns of the coil are not changed, the excitation current of the series/parallel connection mixed connection mode I is 3 times of the excitation current of the series connection mode, so that the damping coefficient of the series/parallel connection mixed connection mode I is 3 times of the damping coefficient of the series connection mode;
as shown in fig. 6, the series/parallel hybrid connection mode ii of the excitation winding 3 is: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the negative pole of the excitation voltage; repeating the 1 st, 2 nd and 3 rd coil wiring modes for the 4 th, 5 th and 6 th coils, and the like until the 1 st, 2 nd and 3 rd coil wiring modes are repeated for the 10 th, 11 th and 12 th coils; under the condition that the same excitation voltage and the number of turns of the coil are not changed, the excitation current of the series/parallel connection mode II is 4/3 times of the excitation current of the series connection mode, so that the damping coefficient of the series/parallel connection mode II is 4/3 times of the damping coefficient of the series connection mode;
as shown in fig. 7, the series/parallel hybrid connection mode iii of the field winding 3 is: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the negative pole of the excitation voltage; repeating the 1 st, 2 nd, 3 rd and 4 th coil wiring modes for the 5 th, 6 th, 7 th and 8 th coils, and the like until the 1 st, 2 nd, 3 th and 4 th coil wiring modes are repeated for the 9 th, 10 th, 11 th and 12 th coils; under the condition that the same excitation voltage and the number of turns of the coil are not changed, the excitation current of the series/parallel connection mixed connection mode III is 3/4 times of the excitation current of the series connection mode, so that the damping coefficient of the series/parallel connection mixed connection mode III is 3/4 times of the damping coefficient of the series connection mode;
as shown in fig. 8, the series/parallel hybrid connection mode iv of the excitation winding 3 is: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the primary side of the 5 th coil, and the like is repeated until the secondary side of the 6 th coil is connected with the negative pole of the excitation voltage; the wiring modes of the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th coils are repeated by 7 th, 8 th, 9 th, 10 th, 11 th and 12 th coils; under the condition of the same excitation voltage and the same number of turns of the coil, the excitation current of the series/parallel connection mode IV is 1/3 times of the excitation current of the series connection mode, so the damping coefficient of the series/parallel connection mode IV is 1/3 times of the damping coefficient of the series connection mode.
Examples
The serial connection mode:
the 1 st coil is wound on the 1 st tooth of the stator core, the 2 nd coil is wound on the 2 nd tooth in the opposite direction, the 3 rd coil is wound in the same direction as the first coil, and so on until the 12 th coil is wound on the 12 th tooth in the opposite direction.
The primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the primary side of the 5 th coil, and the like until the secondary side of the 12 th coil is connected with the negative pole of the excitation voltage;
according to the excitation type eddy current damper, the excitation winding adopts a serial connection type wiring mode, the excitation current can be continuously adjusted from zero, and closed-loop control of the excitation current is realized through closed-loop control of the amplitude of the excitation voltage, so that closed-loop control of a damping coefficient is realized.
Claims (8)
1. An excitation type eddy current damper comprises a rotor (1), a stator core (2) and an excitation winding (3), and is characterized in that: the rotor (1) consists of a damping cup and a magnetic yoke, wherein the damping cup is made of a low-resistance copper alloy material, and the magnetic yoke is made of a high-saturation soft magnetic alloy material; the stator core (2) is formed by laminating stator punching sheets made of a high-saturation soft magnetic alloy material, 12 slots are uniformly distributed on the stator core, an excitation winding (3) is arranged in each slot, the excitation winding (3) is arranged in a centralized winding mode and is sequentially arranged in a forward direction and a reverse direction from slot to slot, six pairs of N, S-pole induction magnetic fields are formed in the 360-degree range of the excircle of the stator core (2) after excitation current is supplied to the excitation winding (3), and the electrical angle occupied by each N pole and each S pole is 30 degrees; the inner circle of the stator core (2) is connected with a fixed shaft of the damper, a gap between the outer circle of the stator core (2) and the inner circle of the magnet yoke of the rotor (1) is a working air gap, and the outer circle of the rotor (1) is connected with an output shaft of the damper.
2. A method for realizing continuous adjustment of a damping coefficient of an eddy current damper is characterized by comprising the following steps:
step 1: the eddy current damper as claimed in claim 1, wherein the exciting winding (3) is installed, the exciting winding (3) has 12 coils, and is embedded in the stator core (2) in a concentrated winding manner, the first coil is wound on the 1 st tooth of the stator core (2), the 2 nd coil is wound on the 2 nd tooth in the opposite direction, the 3 rd coil is wound in the same direction as the 1 st coil, and so on, until the 12 th coil is wound on the 12 th tooth in the opposite direction;
step 2: according to the performance index requirement of the damper, the parallel connection, series connection and series/parallel connection mixed multiple forms of each coil can be realized by changing the head and tail connection modes of 12 coils, so that the flexible adjustment of multiple ranges of damping coefficients can be realized under the same external input excitation voltage, the size of the excitation current in the excitation winding (3) is controlled by changing the amplitude of the excitation voltage aiming at each connection mode, the size of the induction field in a working air gap is adjusted, and the size of the eddy current in the damper is changed to realize the continuous adjustment and real-time closed-loop control of the damping coefficient from zero.
3. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the series connection wiring mode of the excitation winding (3) is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the primary side of the 5 th coil, and so on until the secondary side of the 12 th coil is connected with the negative pole of the excitation voltage.
4. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the parallel connection mode of the excitation windings (3) is as follows: the primary side of each coil is connected with the positive pole of the excitation voltage, and the secondary side of each coil is connected with the negative pole of the excitation voltage.
5. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the series/parallel connection mixed connection mode I of the excitation winding (3) is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, the secondary side of the 1 st coil is connected with the secondary side of the 2 nd coil, and the primary side of the 2 nd coil is connected with the negative pole of the excitation voltage; and repeating the wiring modes of the 1 st coil and the 2 nd coil for the 3 rd coil and the 4 th coil, and the like until the wiring modes of the 1 st coil and the 2 nd coil are repeated for the 11 th coil and the 12 th coil.
6. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the series/parallel connection mixed connection mode II of the excitation winding (3) is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the negative pole of the excitation voltage; and repeating the 1 st, 2 nd and 3 rd coil wiring modes for the 4 th, 5 th and 6 th coils, and the like until repeating the 1 st, 2 nd and 3 rd coil wiring modes for the 10 th, 11 th and 12 th coils.
7. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the series/parallel connection mixed connection mode III of the excitation winding (3) is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the negative pole of the excitation voltage; and repeating the 1 st, 2 nd, 3 rd and 4 th coil wiring modes for the 5 th, 6 th, 7 th and 8 th coils, and the like until the 1 st, 2 nd, 3 th and 4 th coil wiring modes are repeated for the 9 th, 10 th, 11 th and 12 th coils.
8. A method of continuously adjusting the damping coefficient as claimed in claim 2, characterized in that: the series/parallel connection mixed wiring mode IV of the excitation winding (3) is as follows: the primary side of the 1 st coil is connected with the positive pole of the excitation voltage, and the secondary side is connected with the secondary side of the 2 nd coil; the primary side of the 2 nd coil is connected with the primary side of the 3 rd coil, and the secondary side of the 3 rd coil is connected with the secondary side of the 4 th coil; the primary side of the 4 th coil is connected with the primary side of the 5 th coil, and the like is repeated until the secondary side of the 6 th coil is connected with the negative pole of the excitation voltage; the wiring modes of the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th coils are repeated by the 7 th, 8 th, 9 th, 10 th, 11 th and 12 th coils.
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| CN201610727157.3A CN107781338B (en) | 2016-08-25 | 2016-08-25 | Excitation type eddy current damper and method for continuously adjusting damping coefficient |
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| CN201610727157.3A CN107781338B (en) | 2016-08-25 | 2016-08-25 | Excitation type eddy current damper and method for continuously adjusting damping coefficient |
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| CN107781338B true CN107781338B (en) | 2020-06-09 |
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| CN1609471A (en) * | 2004-11-04 | 2005-04-27 | 浙江大学 | Electric eddy-current damping device for rotary machine rotor |
| CN101402309A (en) * | 2008-10-08 | 2009-04-08 | 毕国忠 | Oscillation damping power collector for automobile |
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| CN103062307A (en) * | 2012-12-19 | 2013-04-24 | 哈尔滨工业大学 | Eddy-current damping vibration isolator with coplace air flotation orthogonal decoupling and two-dimensional flexible hinge angle decoupling |
| CN103233996A (en) * | 2013-04-28 | 2013-08-07 | 哈尔滨工业大学 | Linear electromagnetic damper with serially-connected magnetic circuit structure |
| CN104455141A (en) * | 2014-11-18 | 2015-03-25 | 南京航空航天大学 | Series magnetic circuit mixed excitation linear electromagnetic damper |
| CN105041936A (en) * | 2015-06-30 | 2015-11-11 | 上海材料研究所 | Installation method of eddy current retarder. |
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2016
- 2016-08-25 CN CN201610727157.3A patent/CN107781338B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6095295A (en) * | 1997-10-09 | 2000-08-01 | Korea Advanced Institute Science And Technology | Rotary damper |
| CN1609471A (en) * | 2004-11-04 | 2005-04-27 | 浙江大学 | Electric eddy-current damping device for rotary machine rotor |
| CN101402309A (en) * | 2008-10-08 | 2009-04-08 | 毕国忠 | Oscillation damping power collector for automobile |
| CN102720786A (en) * | 2012-07-09 | 2012-10-10 | 哈尔滨工业大学 | Multi-degree of freedom electromagnetic damper |
| CN103062307A (en) * | 2012-12-19 | 2013-04-24 | 哈尔滨工业大学 | Eddy-current damping vibration isolator with coplace air flotation orthogonal decoupling and two-dimensional flexible hinge angle decoupling |
| CN103233996A (en) * | 2013-04-28 | 2013-08-07 | 哈尔滨工业大学 | Linear electromagnetic damper with serially-connected magnetic circuit structure |
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