CN101465592A - Variable-frequency control electromagnetic torsion coupler and use thereof - Google Patents
Variable-frequency control electromagnetic torsion coupler and use thereof Download PDFInfo
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- CN101465592A CN101465592A CNA2009100762470A CN200910076247A CN101465592A CN 101465592 A CN101465592 A CN 101465592A CN A2009100762470 A CNA2009100762470 A CN A2009100762470A CN 200910076247 A CN200910076247 A CN 200910076247A CN 101465592 A CN101465592 A CN 101465592A
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Abstract
The invention relates to a variable-frequency speed-regulating magnetic torque coupler which is characterized in that: the coupler comprises a shell, and an inner rotor mechanical axis and an outer rotor mechanical axis are arranged in the shell; the inner rotor mechanical axis is connected with an inner rotor which is supported on a static bearing frame of the inner rotor, and the outer rotor mechanical axis is connected with an outer rotor which is supported on the static bearing frame of the outer rotor; an electromagnetic coupling working air gap is formed between the inner rotor and the outer rotor; the outer rotor is internally provided with an armature winding which is connected with a group of three-phase static electric brushes by three drainage slipping rings; the three-phase static electric brush is connected with the output end of a frequency converter, and the input end of the frequency converter is connected with a three-phase alternating-current electric fence. As a variable-frequency speed-regulating technology is introduced in a simple electric transmission system, non-contact torque transmission and stepless speed regulation between two rotary mechanical shafts can be realized by utilizing the principle of variable-frequency motors. The variable-frequency speed-regulating magnetic torque coupler can be widely applied to transmission systems.
Description
Technical field
The present invention relates to a kind of electric drive, particularly about the variable-frequency control electromagnetic torsion coupler and the application thereof of a kind of Electric Drive and power conversion.
Background technology
Drive technology is one of basic technology of numerous applications such as industrial and agricultural production, energy extraction, communications and transportation and defence equipment.In order to bring into play the service behaviour of relevant device in each application as far as possible, often need in its power transmission course, realize stepless speed regulation.For example, under the constant substantially prerequisite of power shaft rotating speed, wish that the output shaft rotating speed of transmission device can be regulated arbitrarily in certain scope, perhaps conversely when the power shaft rotating speed changes within the specific limits, the rotating speed of output shaft can be kept constant substantially.
Drive technology generally can be divided into machine driving and Electric Drive two big classes.Traditional machine driving such as gear box and belt etc. have fixing I/O speed ratio usually, are difficult to directly satisfy the requirement of stepless speed regulation.Fluid coupling is by regulating the pressure and the flow of liquid, can change transmission speed ratio smoothly, but when transmission speed ratio is big, the operating efficiency of such device significantly reduces, and machinery and hydraulic unit number that fluid coupling uses are more, relate to the rotary seal problem of high-pressure hydraulic, and be relatively more responsive to material and operational environment, service life is short, and maintenance workload is relatively large; The composite electric drive system, form by two motors in fact, wherein one as generator, with all or part of electrical power that is converted to of the mechanical output of power shaft, and another motor is converted to this electrical power mechanical output again, can there be certain form mechanical connection between these two motors, the transmitting portions mechanical output, need to reduce the amount of electrical power of conversion, but the machinery of composite electric drive system and electrical structure more complicated, volume is big, cost is high, all is subjected to certain restriction in actual use; Simple power transmission system, for example electromagnetic slip clutches have softer mechanical property, by regulating the amplitude of its exciting current, can change the rotating speed of load, but similar to fluid coupling, and when speed adjustable range was big, its operating efficiency significantly reduced.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of high efficiency, simple in structure and variable-frequency control electromagnetic torsion coupler and application thereof that reliability is high.
For achieving the above object, the present invention takes following technical scheme: a kind of variable-frequency control electromagnetic torsion coupler, it is characterized in that: it comprises a housing, be provided with an internal rotor mechanical axis and an external rotor mechanical axis in the described housing, described internal rotor mechanical axis is connected with an internal rotor, described internal rotor is supported on the static support of bearing of an internal rotor, described external rotor mechanical axis is connected with an external rotor, described external rotor is supported on the static support of bearing of external rotor, between described internal rotor and described external rotor, form an electromagnetic coupled working gas gap, described external rotor contains an armature winding, described armature winding is connected with one group of three phase static brush by three drainage slip rings, described three phase static brush is connected with the output of a frequency converter, and the input of described frequency converter is connected with the three-phase alternating current electrical network.
The frequency of the electric current in the described armature winding, amplitude and phase place are controlled the electromagnetic torque of electromagnetic coupler by the adjusting of described frequency converter, thereby change the relative rotation speed between the described inside and outside rotor; By described electromagnetic torque transmitting torque and power between described internal rotor and the described external rotor, described electromagnetic torque is controlled by the electric current of described frequency converter output between the described inside and outside rotor mechanical axle.
When the relative rotation speed of described inside and outside rotor mechanical axle changed, the current following of then described frequency converter output changed.
Have speed discrepancy between the rotating speed of described internal rotor mechanical axis rotating speed and described external rotor mechanical axis, when described internal rotor mechanical axis rotating speed during greater than the rotating speed of described external rotor mechanical axis, described armature winding feeds out electrical power to described frequency converter; When described internal rotor mechanical axis rotating speed during smaller or equal to the rotating speed of described external rotor mechanical axis, described armature winding absorbs electrical power from described frequency converter.
When described internal rotor mechanical axis rotating speed during more than or equal to the rotating speed of described external rotor mechanical axis, described frequency converter is the Technics of Power Electronic Conversion device of an electrical power two-way flow; When described internal rotor mechanical axis rotating speed during less than the rotating speed of described external rotor mechanical axis, described frequency converter is the Technics of Power Electronic Conversion device of an electrical power one-way flow.
The structure of described internal rotor adopts a kind of in permanent magnetism, salient pole iron core, the induction mouse cage.
Described variable-frequency control electromagnetic torsion coupler is applied in the speed-variable frequency-constant wind-driven generator group, the input of described internal rotor mechanical axis is connected with the rotor of a speed change wind energy conversion system by a raising speed gear box, the output of described external rotor mechanical axis is connected with the armature spindle of a synchronous generator, and described synchronous generator is connected with AC power grid by transformer.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to introduce variable-frequency control technique, therefore this variable-frequency control electromagnetic torsion coupler has harder mechanical property, thereby improved the operational efficiency of device, realized noncontact transmission of torque and stepless speed regulation between two rotating machinery shafts.2, therefore the present invention has simple in structure, operational reliability advantages of higher owing to only contain an electromagnetic coupled working gas gap.3, apparatus of the present invention are owing to be applied in the speed-variable frequency-constant wind-driven generator group, when the rotor of wind energy conversion system is followed the wind speed variation, regulate by this variable-frequency control electromagnetic torsion coupler, generator is under the constant rotational speed all the time to be moved, therefore can use the electric excitation synchronous generator that directly is incorporated into the power networks of mature and reliable, thoroughly solve the more weak problem of low voltage ride-through capability of wind turbine generator system.The present invention can be widely used in the various drive systems.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the principle schematic that the present invention is applied to wind turbine generator
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, be variable-frequency control electromagnetic torsion coupler provided by the present invention, it adopts noncontact transmission of torque structure, specifically comprise a housing 20, be provided with an internal rotor mechanical axis 1 and an external rotor mechanical axis 2 in the housing 20, internal rotor mechanical axis 1 is connected with the internal rotor 3 of a common AC motor rotor, internal rotor 3 is supported on the static support of bearing 4 of an internal rotor, can rotate freely, external rotor mechanical axis 2 is connected with the external rotor 5 of a common alternating current machine stator, external rotor 5 is supported on the static support of bearing 6 of an external rotor, also can rotate freely, and forms an electromagnetic coupled working gas gap 15 between internal rotor 3 and external rotor 5.Comprise a three-phase alternating current armature winding 7 that adopts Y-connection or triangle to connect in the external rotor 5, the three-phase port pins 8 of three-phase alternating current armature winding 7 is connected with three drainage slip rings 9 that together rotate with external rotor 5, drainage slip ring 9 is connected with one group of three phase static brush 10 on being fixed on the static support of bearing 6 of external rotor, the lead-in wire 11 of three phase static brush 10 is connected with an output that is used for controlling the friendship orthogonal voltage frequency converter 12 of electromagnetic torque, but frequency converter 12 is Technics of Power Electronic Conversion devices of an electrical power two-way flow, its output and input port can absorb or feed out electrical power, and the input of frequency converter 12 goes between by one and 13 is connected with three-phase alternating current electrical network 14.
The present invention utilizes the frequency control motor principle, make frequency, amplitude and the phase place adjusting by frequency converter 12 of the electric current of the armature winding 7 of flowing through, reach the electromagnetic torque of control electromagnetic coupler, thereby change the relative rotation speed between internal rotor 3 and the external rotor 5, realize the noncontact transmission of torque.Only can be between the inside and outside rotor mechanical axle 1,2 by electromagnetic torque transmitting torque and the power between internal rotor 3 and the external rotor 5, this electromagnetic torque is directly controlled by the electric current of frequency converter 12 outputs, the frequency of this electric current changes with above-mentioned relative rotation speed, all the time be in little slippage running status with maintenance internal rotor 3 with respect to the rotating magnetic field that armature supply produces, thereby obviously improve the operational efficiency of device.In the present embodiment, inside and outside rotor mechanical axle 1,2 both can have identical torque, also can be torque inequality.Rotation speed n when internal rotor mechanical axis 1
1Be lower than, be equal to or higher than the rotation speed n of external rotor mechanical axis 2
2The time, the speed discrepancy that forms between the two is Δ n=n
1-n
2Thereby make and form the mechanical power rate variance between internal rotor mechanical axis 1 and the external rotor mechanical axis 2, be slip power, this slip power is converted into the electrical power in the armature winding 7 on the external rotor 5, is used for controlling the electromagnetic torque that variable-frequency control electromagnetic torsion coupler of the present invention transmits.Work as n
1N
2The time, armature winding 7 feeds out electrical power to frequency converter 12; Work as n
1≤ n
2The time, armature winding 7 absorbs electrical power from frequency converter 12.
In the foregoing description, frequency converter 12 has output and imports two three-phase ports, output port 11 is connected with static brush 10 through going between, static brush 10 is connected with three-phase alternating current armature winding 7 in the external rotor 5 through slip rings 9 and three-phase port pins 8, the frequency f of the voltage and current in the armature winding 7 is determined by the rotation speed difference deltan n between the inside and outside rotor mechanical axle 1,2, input port is connected with three-phase alternating current electrical network 14 by lead-in wire 13, and the frequency of its voltage and current is consistent with the frequency of electrical network.In the present embodiment, when the rotating speed of internal rotor mechanical axis 1 was lower than the rotating speed of external rotor mechanical axis 2, frequency converter 12 can be the Technics of Power Electronic Conversion device of an electrical power one-way flow.Rotate by frequency converter 12 control external rotor mechanical axis 2 constant speed, thereby the constant speed that drives external device is rotated.
In the foregoing description, the present invention only contains an electromagnetic coupled working gas gap between internal rotor 3 and external rotor 5, promptly the electromagnetic coupled working gas gap 15, compare with two gap structures of conventional electric power drive system, the present invention has reduced by an air gap, thus the structure of simplification device greatly.Internal rotor 3 of the present invention can adopt structures such as permanent magnetism, salient pole iron core or induction mouse cage.
As shown in Figure 2, for the present invention is applied in the speed-variable frequency-constant wind-driven generator group, generating set comprises a speed change wind energy conversion system 16, the rotor of speed change wind energy conversion system 16 is connected with the input of internal rotor mechanical axis 1 of the present invention by a raising speed gear box 17, the output of external rotor mechanical axis 2 is connected with the armature spindle of a synchronous generator 18, and synchronous generator 18 directly or by transformer inserts a medium voltage electricity net 19.
The foregoing description in use, when the rotor of speed change wind energy conversion system 16 is followed the wind speed variation, speed change wind energy conversion system 16 drives raising speed gear box 17, thereby drive 1 rotation of internal rotor mechanical axis, the output torque of internal rotor mechanical axis 1 passes to external rotor mechanical axis 2 by electromagnetic coupled, simultaneously, regulate the rotating speed of external rotor mechanical axis 2 by frequency converter 12, make the rotation of external rotor mechanical axis 2 constant speed, external rotor mechanical axis 2 drives synchronous alternating-current generator 18, make generator 18 constant speed rotation all the time, the alternating current that generator 18 sends can directly or by transformer insert medium voltage electricity net 19, thereby realize the variable speed constant frequency operation of wind-powered electricity generation unit, thoroughly solved the more weak problem of low voltage ride-through capability of wind turbine generator system, and improved the device reliability of operation.
In the various embodiments described above, can also there be other to change with being connected,, should do not get rid of outside protection scope of the present invention based on the changes and improvements on the technical solution of the present invention in structure.
Claims (8)
1, a kind of variable-frequency control electromagnetic torsion coupler, it is characterized in that: it comprises a housing, be provided with an internal rotor mechanical axis and an external rotor mechanical axis in the described housing, described internal rotor mechanical axis is connected with an internal rotor, described internal rotor is supported on the static support of bearing of an internal rotor, described external rotor mechanical axis is connected with an external rotor, described external rotor is supported on the static support of bearing of external rotor, between described internal rotor and described external rotor, form an electromagnetic coupled working gas gap, described external rotor contains an armature winding, described armature winding is connected with one group of three phase static brush by three drainage slip rings, described three phase static brush is connected with the output of a frequency converter, and the input of described frequency converter is connected with the three-phase alternating current electrical network.
2, a kind of variable-frequency control electromagnetic torsion coupler as claimed in claim 1, it is characterized in that: the frequency of the electric current in the described armature winding, amplitude and phase place are by the adjusting of described frequency converter, control the electromagnetic torque of electromagnetic coupler, thereby change the relative rotation speed between the described inside and outside rotor; By described electromagnetic torque transmitting torque and power between described internal rotor and the described external rotor, described electromagnetic torque is controlled by the electric current of described frequency converter output between the described inside and outside rotor mechanical axle.
3, a kind of variable-frequency control electromagnetic torsion coupler as claimed in claim 2 is characterized in that: when the relative rotation speed of described inside and outside rotor mechanical axle changed, the current following of then described frequency converter output changed.
4, as claim 1 or 2 or 3 described a kind of variable-frequency control electromagnetic torsion couplers, it is characterized in that: have speed discrepancy between the rotating speed of described internal rotor mechanical axis rotating speed and described external rotor mechanical axis, when described internal rotor mechanical axis rotating speed during greater than the rotating speed of described external rotor mechanical axis, described armature winding feeds out electrical power to described frequency converter; When described internal rotor mechanical axis rotating speed during smaller or equal to the rotating speed of described external rotor mechanical axis, described armature winding absorbs electrical power from described frequency converter.
5, a kind of variable-frequency control electromagnetic torsion coupler as claimed in claim 4, it is characterized in that: when described internal rotor mechanical axis rotating speed during more than or equal to the rotating speed of described external rotor mechanical axis, described frequency converter is the Technics of Power Electronic Conversion device of an electrical power two-way flow; When described internal rotor mechanical axis rotating speed during less than the rotating speed of described external rotor mechanical axis, described frequency converter is the Technics of Power Electronic Conversion device of an electrical power one-way flow.
6, as claim 1 or 2 or 3 or 5 described a kind of variable-frequency control electromagnetic torsion couplers, it is characterized in that: the structure of described internal rotor adopts a kind of in permanent magnetism, salient pole iron core, the induction mouse cage.
7, a kind of variable-frequency control electromagnetic torsion coupler as claimed in claim 4 is characterized in that: the structure of described internal rotor adopts a kind of in permanent magnetism, salient pole iron core, the induction mouse cage.
8, a kind of application of variable-frequency control electromagnetic torsion coupler as claimed in claim 1, it is characterized in that: described variable-frequency control electromagnetic torsion coupler is applied in the speed-variable frequency-constant wind-driven generator group, the input of described internal rotor mechanical axis is connected with the rotor of a speed change wind energy conversion system by a raising speed gear box, the output of described external rotor mechanical axis is connected with the armature spindle of a synchronous generator, and described synchronous generator is connected with AC power grid by transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100762470A CN101465592A (en) | 2009-01-08 | 2009-01-08 | Variable-frequency control electromagnetic torsion coupler and use thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100762470A CN101465592A (en) | 2009-01-08 | 2009-01-08 | Variable-frequency control electromagnetic torsion coupler and use thereof |
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| CN101465592A true CN101465592A (en) | 2009-06-24 |
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| CNA2009100762470A Pending CN101465592A (en) | 2009-01-08 | 2009-01-08 | Variable-frequency control electromagnetic torsion coupler and use thereof |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860314A (en) * | 2010-05-19 | 2010-10-13 | 鞍山钦元节能设备制造有限公司 | Barrel-type electromagnetic speed regulation system |
| CN101944826A (en) * | 2010-10-11 | 2011-01-12 | 西安盾安电气有限公司 | Non-contact type speed-adjustable electromagnetic coupler |
| CN102097889A (en) * | 2011-02-17 | 2011-06-15 | 国电联合动力技术有限公司 | Transmission chain of wind generating set |
| CN102163890A (en) * | 2011-03-22 | 2011-08-24 | 国电联合动力技术有限公司 | Transmission chain of synchronous wind generating set with series connection type electromagnetic coupler |
| CN102810939A (en) * | 2012-08-13 | 2012-12-05 | 西安盾安电气有限公司 | Speed-self-regulating synchronous generating system |
| CN102832782A (en) * | 2012-08-01 | 2012-12-19 | 北京工业大学 | Moment generator based on electromagnetic effect |
| CN103840636A (en) * | 2012-11-22 | 2014-06-04 | 丁金助 | Magnetic energy transmission device and generator provided with the same |
| CN103855887A (en) * | 2012-12-03 | 2014-06-11 | 杨玉岗 | Non-salient pole electromagnetic speed regulator |
| CN103915960A (en) * | 2012-12-28 | 2014-07-09 | 杨玉岗 | Integrated electromagnetic speed-regulating motor |
| CN103929027A (en) * | 2013-01-11 | 2014-07-16 | 杨玉岗 | Integrated switch reluctance type electromagnetic speed-adjustable motor |
| CN104009609A (en) * | 2013-02-22 | 2014-08-27 | 天津吉玄节能技术有限公司 | Transmission-shaft graded-adjustment neodymium-iron-boron speed regulation device |
| CN104506016A (en) * | 2014-12-30 | 2015-04-08 | 江苏大学 | Permanent-magnetic-type slipping clutch and control method |
| CN104767357A (en) * | 2014-07-30 | 2015-07-08 | 江苏磁谷科技股份有限公司 | Winding type permanent magnet coupling transmission device |
| CN105119464A (en) * | 2015-08-13 | 2015-12-02 | 江苏磁谷科技股份有限公司 | Magnetic coupling shaft generation system and application of magnetic coupling shaft generation system in ship |
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| CN103401397B (en) * | 2013-07-16 | 2016-06-08 | 胡晋青 | Automatic gearbox |
| CN105720792A (en) * | 2016-03-30 | 2016-06-29 | 江苏磁谷科技股份有限公司 | Magnetic coupling |
| CN104009609B (en) * | 2013-02-22 | 2016-11-30 | 天津吉玄节能技术有限公司 | Power transmission shaft classification regulation neodymium iron boron arrangements for speed regulation |
| CN106469965A (en) * | 2015-08-05 | 2017-03-01 | 江苏金源锻造股份有限公司 | A kind of wind-driven generator electric power system |
| CN106911244A (en) * | 2017-04-20 | 2017-06-30 | 大连交通大学 | Permanent magnet speed regulation device based on electric current adjusting type |
| CN107346931A (en) * | 2016-05-04 | 2017-11-14 | 丁金助 | Magnetic energy driven generator |
| CN107979261A (en) * | 2017-11-01 | 2018-05-01 | 山东洁盟节能环保技术有限公司 | A kind of permanent-magnet speed governor of fixed magnetic gap |
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| CN113098221A (en) * | 2021-03-09 | 2021-07-09 | 华中科技大学 | High-voltage large-capacity direct current motor without commutator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860314A (en) * | 2010-05-19 | 2010-10-13 | 鞍山钦元节能设备制造有限公司 | Barrel-type electromagnetic speed regulation system |
| CN101944826A (en) * | 2010-10-11 | 2011-01-12 | 西安盾安电气有限公司 | Non-contact type speed-adjustable electromagnetic coupler |
| CN102097889A (en) * | 2011-02-17 | 2011-06-15 | 国电联合动力技术有限公司 | Transmission chain of wind generating set |
| CN102163890A (en) * | 2011-03-22 | 2011-08-24 | 国电联合动力技术有限公司 | Transmission chain of synchronous wind generating set with series connection type electromagnetic coupler |
| CN102832782A (en) * | 2012-08-01 | 2012-12-19 | 北京工业大学 | Moment generator based on electromagnetic effect |
| CN102810939B (en) * | 2012-08-13 | 2015-01-28 | 西安盾安电气有限公司 | Speed-self-regulating synchronous generating system |
| CN102810939A (en) * | 2012-08-13 | 2012-12-05 | 西安盾安电气有限公司 | Speed-self-regulating synchronous generating system |
| CN103840636A (en) * | 2012-11-22 | 2014-06-04 | 丁金助 | Magnetic energy transmission device and generator provided with the same |
| CN103855887A (en) * | 2012-12-03 | 2014-06-11 | 杨玉岗 | Non-salient pole electromagnetic speed regulator |
| CN103915960A (en) * | 2012-12-28 | 2014-07-09 | 杨玉岗 | Integrated electromagnetic speed-regulating motor |
| CN103929027A (en) * | 2013-01-11 | 2014-07-16 | 杨玉岗 | Integrated switch reluctance type electromagnetic speed-adjustable motor |
| CN104009609A (en) * | 2013-02-22 | 2014-08-27 | 天津吉玄节能技术有限公司 | Transmission-shaft graded-adjustment neodymium-iron-boron speed regulation device |
| CN104009609B (en) * | 2013-02-22 | 2016-11-30 | 天津吉玄节能技术有限公司 | Power transmission shaft classification regulation neodymium iron boron arrangements for speed regulation |
| CN103401397B (en) * | 2013-07-16 | 2016-06-08 | 胡晋青 | Automatic gearbox |
| CN104767357B (en) * | 2014-07-30 | 2018-01-02 | 江苏磁谷科技股份有限公司 | A kind of winding type permanent magnet coupling drive device |
| CN104767357A (en) * | 2014-07-30 | 2015-07-08 | 江苏磁谷科技股份有限公司 | Winding type permanent magnet coupling transmission device |
| US10498211B2 (en) | 2014-07-30 | 2019-12-03 | Jiangsu Magnet Valley Technologies Co., Ltd. | Winding-type permanent magnet coupling transmission device |
| WO2016015517A1 (en) * | 2014-07-30 | 2016-02-04 | 江苏磁谷科技股份有限公司 | Winding type permanent magnet slip clutch and application |
| EP3176931A4 (en) * | 2014-07-30 | 2018-03-21 | Jiangsu Magnet Valley Technologies Co., Ltd. | Winding type permanent magnet coupling transmission device |
| CN104506016B (en) * | 2014-12-30 | 2017-09-12 | 江苏大学 | Magneto speed differential clutch and control method |
| CN104506016A (en) * | 2014-12-30 | 2015-04-08 | 江苏大学 | Permanent-magnetic-type slipping clutch and control method |
| CN106469965B (en) * | 2015-08-05 | 2019-04-12 | 江苏金源高端装备股份有限公司 | A kind of wind-driven generator power supply system |
| CN106469965A (en) * | 2015-08-05 | 2017-03-01 | 江苏金源锻造股份有限公司 | A kind of wind-driven generator electric power system |
| CN105119464A (en) * | 2015-08-13 | 2015-12-02 | 江苏磁谷科技股份有限公司 | Magnetic coupling shaft generation system and application of magnetic coupling shaft generation system in ship |
| CN105591524A (en) * | 2016-02-24 | 2016-05-18 | 江苏大学 | Permanent magnet rotating speed difference clutch and self-adaption nonsingular terminal slip form rotating speed control method thereof |
| CN105591524B (en) * | 2016-02-24 | 2018-04-24 | 江苏大学 | A kind of permanent magnetism speed differential clutch and its adaptive non-singular terminal sliding formwork method for controlling number of revolution |
| CN105720792A (en) * | 2016-03-30 | 2016-06-29 | 江苏磁谷科技股份有限公司 | Magnetic coupling |
| CN107346931A (en) * | 2016-05-04 | 2017-11-14 | 丁金助 | Magnetic energy driven generator |
| CN106911244A (en) * | 2017-04-20 | 2017-06-30 | 大连交通大学 | Permanent magnet speed regulation device based on electric current adjusting type |
| CN107979261A (en) * | 2017-11-01 | 2018-05-01 | 山东洁盟节能环保技术有限公司 | A kind of permanent-magnet speed governor of fixed magnetic gap |
| CN111525864A (en) * | 2019-07-09 | 2020-08-11 | 河海大学 | Operation control method of four-quadrant operation electromagnetic clutch |
| CN111525864B (en) * | 2019-07-09 | 2021-11-09 | 河海大学 | Operation control method of four-quadrant operation electromagnetic clutch |
| CN113098221A (en) * | 2021-03-09 | 2021-07-09 | 华中科技大学 | High-voltage large-capacity direct current motor without commutator |
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