KR20170085829A - Variable speed power transmission using magnetic coupling - Google Patents
Variable speed power transmission using magnetic coupling Download PDFInfo
- Publication number
- KR20170085829A KR20170085829A KR1020160005458A KR20160005458A KR20170085829A KR 20170085829 A KR20170085829 A KR 20170085829A KR 1020160005458 A KR1020160005458 A KR 1020160005458A KR 20160005458 A KR20160005458 A KR 20160005458A KR 20170085829 A KR20170085829 A KR 20170085829A
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- Prior art keywords
- load
- magnetic coupling
- disk
- pole
- coupling surfaces
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
-
- 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
- F16H—GEARING
- F16H49/00—Other gearings
- F16H49/005—Magnetic gearings with physical contact between gears
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0242—Magnetic drives, magnetic coupling devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable speed power transmission apparatus using magnetic coupling, and more particularly, to a variable speed power transmission apparatus using a variable speed power transmission system for facilitating variable speed operation of a load driven by a motor Transmitting device.
The present invention has the following effects.
By applying the power connection method between the motor and the load through magnetic coupling, it is possible to freely adjust the rotational speed of the load driven by the motor by adjusting the magnetic force of the permanent magnet by the electromagnetic method, Minimizing the power usage of the driven system and minimizing installation and maintenance costs with a simple structure.
Description
BACKGROUND OF THE
The method of controlling the operation speed of the load driven by the motor can be roughly classified into an electric system and a mechanical system.
There is a method of using an inverter in an electric way.
Inverter is a device that controls the speed by converting the voltage and frequency supplied to the motor. During the power conversion process, the inverter circuit for converting the AC to DC is turned on and the power is again supplied to the motor .
Such an inverter method has advantages such as simple control of a conventional induction motor, non-step variable speed operation in a wide range, and precision speed control, but it has a high installation cost and durability is lower than a fluid coupling And maintenance is difficult.
A mechanical approach is to use fluid coupling.
The fluid coupling is a power transmission element that transmits the rotational force of the input shaft to the output shaft through the fluid. In other words, fluid coupling absorbs impact and torsional vibration due to the characteristics of power transmission method through fluid, and slip occurs during overloading to realize smooth power transmission.
Since the fluid coupling is a fluid power transmission device, there is no coupling wear, durability, and installation cost is high. However, the power loss at high speed (70% speed: power transmission efficiency 65% , 60% speed: power transmission efficiency 52%), a cooling device is required to cool the loss (heat) generated in the fluid coupling, and it is difficult to control the speed precisely according to irregular slip of the fluid coupling itself.
The problems to be solved in the present invention are as follows.
To minimize the power consumption, adjust the operation speed freely, and reduce the installation and maintenance cost through the variable speed operation of the load driven by the motor (motor).
In order to solve the above problems,
A
The
The induction
The
The
Each of the magnet accommodating cells 221ab, 221bc, ... is provided with at least one permanent magnet and at least one electromagnet,
The lower end faces of the
A predetermined gap is formed between the load
And the power transmission speed is controlled by controlling the current of the control current coil (225).
The present invention has the following effects.
By applying the power connection method between the motor and the load through magnetic coupling, it is possible to freely adjust the rotational speed of the load driven by the motor by adjusting the magnetic force of the permanent magnet by the electromagnetic method, Minimizing the power usage of the driven system and minimizing installation and maintenance costs with a simple structure.
1 is a view showing a
2 is a view showing a
3 is an exploded view of a variable power transmission apparatus according to a first embodiment of the present invention;
4 is a perspective view and a coupling view of a variable speed power transmission apparatus according to a first embodiment of the present invention;
5 is a sectional view of the
6 is a diagram illustrating the operation principle of one cell in the coupling mode according to the first embodiment of the present invention.
7 is a diagram illustrating the operation principle of one cell in the non-coupling mode according to the first embodiment of the present invention.
8 is a diagram showing an overall operation principle in a coupling mode (upper diagram) and a non-coupling mode (lower diagram) according to the first embodiment of the present invention.
9 shows a
10 is an exploded view of a variable power transmission apparatus according to a second embodiment of the present invention.
11 is a perspective view of a variable speed power transmission apparatus according to a second embodiment of the present invention.
12 is a diagram illustrating an overall operation principle in a coupled mode according to a second embodiment of the present invention;
13 is a diagram illustrating the operation principle of one cell in the coupling mode according to the second embodiment of the present invention.
FIG. 14 is a diagram showing an overall operation principle in a coupling mode (upper diagram) and a non-coupling mode (lower diagram) according to the third embodiment of the present invention; FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible.
In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.
The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to approximate the numerical values when the manufacturing and material tolerances inherent in the meanings mentioned are presented, Absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure.
The present invention is summarized as follows.
That is, the
And a
The
A
The
A
A
The yoke (221)
A plurality of
And magnet receiving cells 221ab, 221bc, ... separated by the
Each of the magnet accommodating cells 221ab, 221bc, ... is provided with at least one permanent magnet and at least one electromagnet,
The lower end faces of the
The top surfaces of the
The
A predetermined gap is formed between the load
And a power transmission speed is controlled by controlling a current of the control current coil (225).
In the present invention, the direction indications such as up, down, left, and right directions are for explaining with reference to the accompanying drawings, and therefore it is clarified that they are not related to the constitution of the invention. That is, the structure in which the
(Operation Principle)
The principle of operation used in the present invention will be described first with reference to Figs.
For convenience of explanation, when each pole (or a pole to be described later) is defined by a, b, c, etc., a slot (or cell, magnet, etc.) between each pole Pole), bc (between b and c pole), and so on. The following is an example.
The first conductor receiving slot 121ab and the first slot conductor 123ab are located between the
The second conductor receiving slot 121bc and the second slot conductor 123bc are located between the
The first magnet accommodating cell 221ab, the first permanent magnet 223ab, the first magnetization core 224ab and the first current control coil 225ab are disposed between the
The second magnet accommodating cell 221bc, the second permanent magnet 223bc, the second magnetized iron core 224bc and the second current control coil 225bc are disposed between the
At this time, the load magnetic coupling surfaces 122, the drive
The symbols ⊙ and 표시된 shown in the figure indicate the current flow direction and are defined as follows.
⊙: Direction coming out of the ground based on the drawing reference
Ⓧ: Direction to penetrate the ground as a drawing reference
Referring to FIG. 5, the basic configuration for operation of the present invention is as follows.
A first slot conductor 123ab through which an induction current can flow at the lower center of the
The
As described above, the structure between the
The present invention includes an electromagnet composed of a magnetized iron core 224 and a control current coil 225 to control the power transmission speed by controlling the current of the control current coil 225. [
The operation according to the current flow of the first control current coil 225ab in the first magnet accommodating cell 221ab is as follows.
- Non-bonded state -
When the current flowing in the control current coil 225 of the electromagnet is controlled such that the pole of the
7, when the S pole of the first permanent magnet 223ab is joined to the
N pole of the first permanent magnet 223ab →
Therefore, since the magnetic coupling between the load
- Coupled state -
When the current flowing in the control current coil 225 of the electromagnet is controlled so that the pole of the
6, when the S pole of the first permanent magnet 223ab is joined to the
Coupling path 1: N pole of first permanent magnet 223ab →
Coupling path 2: N pole of first magnetization core 224ab →
The induction current flows in the first slot conductor 123ab by the closed magnetic path formed in this way. (⊙ direction) In addition, the second load
With this principle, the
A control device (not shown) for controlling the current flow may be additionally provided in the present invention and is similar to the operation principle of a general electromagnet, so a detailed description of a control method, a direction of an electric pole according to a current flow, and the like will be omitted.
A preferred embodiment of the present invention will be described based on the above-mentioned operation principle.
The first embodiment of the present invention is a sectional structure in which one
The second embodiment of the present invention is a two-sided embodiment, which comprises a single
( First Embodiment )
The variable speed power transmission apparatus using magnetic coupling according to the present invention comprises a
1 is a view showing a
The
As shown in FIG. 1A, the induction
Each of the slot conductors 123ab, 123bc, ... is a linear conductor radially placed so as to correspond to the respective conductor receiving slots 121ab, 121bc, And a circular outer circumference conductor 123s is joined to the other end of each of the slot conductors 123ab, 123bc ... so as to form a wheel-shaped closed circuit 123r. do.
As mentioned above in the description of the principle of operation, the induction
FIG. 2 is a view showing a
The
The
Each of the magnet accommodating cells 221ab, 221bc, ... has one of the magnet accommodating cells 221ab, 221bc, ..., and the other of the magnet accommodating cells 221ab, 221bc,
In this embodiment, the S pole of the first permanent magnet 223ab is connected to the
However, the relationship between the vertical position of the permanent magnet and the position of the electromagnet can be changed as shown in Fig. 14, and the same operation principle is applied, so that it is clarified that the positional relationship between the electromagnet and the permanent magnet and the quantity thereof are not limited.
The lower end faces of the
The
A predetermined gap is formed between the load
Referring to FIG. 8, permanent magnets 223ab, 223bc,..., 223b are provided in the magnet accommodating cells 221ab, 221bc, ..., and are connected to the
FIG. 3 is an exploded view of a variable power transmission apparatus according to a first embodiment of the present invention, and FIG. 4 is a perspective view and a coupling view. The
That is, referring to the perspective view (left side) of FIG. 4, the
When the current control of the control current coils 225ab, 225bc, ... per magnet accommodating cell 221ab, 221bc, ... is individually performed, the drive
For example, when the currents of the control current coils 225ab, 225bc, ... are caused to flow in a certain direction so that the electromagnets of all the magnet accommodating cells 221ab, 221bc, ... are operated in the coupling mode, The load
When the current of the control current coil 225bc is made to flow in a direction opposite to the coupling mode so that the electromagnets of the portion 221bc of the magnet accommodating cells 221ab, 221bc, ... operating in the coupling mode operate in the non-coupling mode The magnetic coupling between the driving magnetic coupling surfaces 222b and 222c and the load magnetic coupling surfaces 122b and 122c of the corresponding cell 221bc is released to cause further slip (s2, where s1 <s2). Therefore, the load can be rotated at a speed of Vs (1-s2) which is much slower than the driving speed Vs.
On the other hand, when the currents of the control current coils 225ab, 225bc, ... are caused to flow in the direction opposite to the coupling mode so that the electromagnets of all the magnet accommodating cells 221ab, 221bc, The magnetic coupling between the
Taken together, when the motor rotational speed Vs and the load rotational speed Vs (1-s)
The
( Second Embodiment )
The
FIG. 9 is a view showing a
As shown in FIG. 9, the
The
The
Each of the magnet accommodating cells 221ab, 221bc, ... has one of the magnet accommodating cells 221ab, 221bc, ..., and the other of the magnet accommodating cells 221ab, 221bc,
In this embodiment, the S pole of the first permanent magnet 223ab is connected to the
However, the same operation principle is applied even if the relationship between the up-down position and the quantity of the permanent magnet and the electromagnet is changed.
The lower end faces of the
The top surfaces of the
The top surfaces of the radial pawls 221a, 221b, 221c, ... are connected to the driving
The lower end surfaces of the radial pawls 221a, 221b, 221c, ... are sub-drive
The
A predetermined air gap is formed between the load
Gap between the sub-load
Referring to FIG. 12, permanent magnets 223ab, 223bc,..., And 223c are provided in the magnet accommodating cells 221ab, 221bc, ..., and the
10 is an exploded view of a variable speed power transmission apparatus according to a second embodiment of the present invention, and Fig. The
That is, referring to the perspective view of FIG. 11, the
When the current control of the control current coils 225ab, 225bc, ... per magnet accommodating cell 221ab, 221bc, ... is individually performed, the drive
The present invention has the following effects.
By applying the power connection method between the motor and the load through magnetic coupling, it is possible to freely adjust the rotational speed of the load driven by the motor by adjusting the magnetic force of the permanent magnet by the electromagnetic method, Minimizing the power usage of the driven system and minimizing installation and maintenance costs with a simple structure.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to those who have knowledge.
100: Load
110: Load shaft
120: load disk portion
121: load disk
121a: first load pole
121ab: slot for receiving first conductor
121b: second load pole
121bc: second conductor receiving slot
121c: third load pole
122: load magnetic coupling surface
122a: first load magnetic coupling surface
122b: second load magnetic coupling surface
122c: third load magnetic coupling surface
123: Induction current coil
123ab: first slot conductor
123bc: second slot conductor
123r: inner conductor
123s: Outer conductor
130: housing
131: housing first side
132: housing second side
140: Bearings
200: motor
210: drive shaft
220: driving disc portion
221: York
221a: first pole
221ab: first magnet receiving cell
221b: second pole
221bc: second magnet receiving cell
221c: third pole
222: drive magnetic coupling surface
222a: first drive magnetic coupling surface
222b: second drive magnetic coupling surface
222c: third drive magnetic coupling surface
223: permanent magnet
223ab: first permanent magnet
223bc: second permanent magnet
224: Magnetization iron core
224ab: 1st magnetized iron core
224bc: Second magnetization iron core
225: Control current coil
225ab: first control current coil
225bc: second control current coil
226: Non-magnetic disk
1226: Non-magnetic disk of the sectional type embodiment
2226: Non-magnetic disk of double-sided embodiment
Claims (3)
And a driving disc unit 220 coupled to the driving shaft 210 at the center thereof and connected to the motor 200,
The load disk unit 120 includes:
A load disk 121 made of a ferromagnetic material,
The driving disc unit 220 includes a driving-
A non-magnetic disk 1226 having a non-magnetic body and a center coupled with the driving shaft 210,
A permanent magnet 223 and a yoke 221 having an electromagnet in which a control current coil 225 is wound around the magnetized iron core 224,
The yoke (221)
A plurality of poles 221a, 221b, 221c, ..., which are arranged in a radial fashion and whose lower surfaces are coupled with the upper surface of the non-magnetic disk 1226,
And magnet receiving cells 221ab, 221bc, ... separated by the respective pawls 221a, 221b, 221c, ...,
Each of the magnet accommodating cells 221ab, 221bc, ... is provided with at least one permanent magnet and at least one electromagnet,
The lower end faces of the load disk poles 121a, 121b, 121c, ... are connected to the load magnetic coupling surfaces 122a, 122b, 122c,
The top surfaces of the radial pawls 221a, 221b, 221c, ... are driven magnetic coupling surfaces 222a, 222b, 222c,
The driving disc portion 220 is disposed at the lower end of the load disc portion 120,
A predetermined gap is formed between the load magnetic coupling surfaces 122a, 122b, 122c, ... and the drive magnetic coupling surfaces 222a, 222b, 222c,
And the power transmission speed is controlled by controlling the current of the control current coil (225).
The load disk unit 120 includes:
A load disk 121 having a plurality of load disk poles 121a, 121b, 121c, ... and conductor accommodating slots 121ab, 121bc, ... formed alternately in a radial shape,
And an induction current coil 123 coupled to the conductor receiving slot as a metal conductor to form a closed circuit,
The induction current coil 123,
A plurality of slot conductors 123ab, 123bc, ... provided corresponding to the conductor receiving slots 121ab, 121bc, ...,
An inner conductor 123r joined to one end portion of the slot conductors 123ab, 123bc, ... facing the central portion,
And an outer circumferential conductor 123s joined to the other end of the slot conductors 123ab, 123bc, ...,
The permanent magnets 223ab, 223bc, ... provided in the respective magnet accommodating cells 221ab, 221bc, ... are connected to the poles 221a, 221b, 221c, ... of the yoke,
Two permanent magnets 223ab and 223bc coupled to one of the pawls 221a, 221b, 221c, ... are arranged so that the same poles face each other,
By controlling the currents flowing in the respective control current coils 225ab, 225bc, ...
Wherein the power transmission speed is controlled according to the degree of magnetic coupling between the load disk unit (120) and the drive disk unit (220).
And a sub-load disk unit 120 'which is inverted in the same manner as the load disk unit 120,
The nonmagnetic disk 1226 is a nonmagnetic disk 2226 whose diameter is smaller than the diameter of the load disk 121,
And the outer side surface thereof is engaged with the inner side surface facing the center of the plurality of pawls 221a, 221b, 221c, ...,
The lower end faces of the load disk poles 121a, 121b, 121c, ... are connected to the load magnetic coupling surfaces 122a, 122b, 122c,
The top surfaces of the sub-load disk poles 121a ', 121b', 121c ', ... are connected to the sub-load magnetic coupling surfaces 122a', 122b ', 122c'
The top surfaces of the radial pawls 221a, 221b, 221c, ... are connected to the driving magnetic coupling surfaces 222a, 222b, 222c, ...,
The lower end faces of the radial pawls 221a, 221b, 221c, ... are sub-drive magnetic coupling surfaces 222a ', 222b', 222c ', ...,
The driving disc portion 220 is disposed at the lower end of the load disc portion 120,
The sub-load disk unit 120 'is disposed at the lower end of the driving disk unit 220,
A predetermined air gap is formed between the load magnetic coupling surfaces 122a, 122b, 122c, ... and the drive magnetic coupling surfaces 222a, 222b, 222c,
Gap between the sub-load magnetic coupling surfaces 122a ', 122b', 122c ', ... and the sub-drive magnetic coupling surfaces 222a', 222b ', 222c' As a result,
By controlling the currents flowing in the respective control current coils 225ab, 225bc, ...
Wherein the power transmission speed is controlled according to the degree of magnetic coupling between the load disk unit (120) and the drive disk unit (220).
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KR1020160005458A KR101783687B1 (en) | 2016-01-15 | 2016-01-15 | Variable speed power transmission using magnetic coupling |
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KR1020160005458A KR101783687B1 (en) | 2016-01-15 | 2016-01-15 | Variable speed power transmission using magnetic coupling |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200076482A (en) * | 2018-12-19 | 2020-06-29 | 주식회사 포스코 | Variable speed magnetic coupling |
CN111711338A (en) * | 2020-05-11 | 2020-09-25 | 南京玛格耐特智能科技有限公司 | Speed-regulating horizontal air-cooled permanent magnet coupler |
CN111981025A (en) * | 2020-08-07 | 2020-11-24 | 中国石油大学(华东) | Magnetic control suction disc device and using method thereof |
CN113765330A (en) * | 2021-08-09 | 2021-12-07 | 自然资源部第三海洋研究所 | Deep sea motor based on magnetic coupling transmission and transmission method |
CN115698533A (en) * | 2020-07-27 | 2023-02-03 | 株式会社台煐凡佳德 | Non-contact non-load power transmission device |
CN117498646A (en) * | 2023-12-12 | 2024-02-02 | 东莞市素派驱动科技有限公司 | Magnetic conduction ultra-silent speed changing device of submersible motor |
-
2016
- 2016-01-15 KR KR1020160005458A patent/KR101783687B1/en active IP Right Grant
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20200076482A (en) * | 2018-12-19 | 2020-06-29 | 주식회사 포스코 | Variable speed magnetic coupling |
CN111711338A (en) * | 2020-05-11 | 2020-09-25 | 南京玛格耐特智能科技有限公司 | Speed-regulating horizontal air-cooled permanent magnet coupler |
CN115698533A (en) * | 2020-07-27 | 2023-02-03 | 株式会社台煐凡佳德 | Non-contact non-load power transmission device |
CN111981025A (en) * | 2020-08-07 | 2020-11-24 | 中国石油大学(华东) | Magnetic control suction disc device and using method thereof |
CN111981025B (en) * | 2020-08-07 | 2022-04-08 | 中国石油大学(华东) | Magnetic control suction disc device and using method thereof |
CN113765330A (en) * | 2021-08-09 | 2021-12-07 | 自然资源部第三海洋研究所 | Deep sea motor based on magnetic coupling transmission and transmission method |
CN113765330B (en) * | 2021-08-09 | 2024-06-04 | 自然资源部第三海洋研究所 | Deep sea motor based on magnetic coupling transmission and transmission method |
CN117498646A (en) * | 2023-12-12 | 2024-02-02 | 东莞市素派驱动科技有限公司 | Magnetic conduction ultra-silent speed changing device of submersible motor |
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