CN110492710B - Double-rotor generator and control method thereof - Google Patents
Double-rotor generator and control method thereof Download PDFInfo
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- H—ELECTRICITY
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- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
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Abstract
The utility model provides a birotor generator, includes the casing, the casing rotates and is connected with the pivot, fixedly connected with stator in the casing, squirrel-cage rotor in the pivot fixedly connected with, be provided with outer permanent-magnet rotor between stator and the interior squirrel-cage rotor, outer permanent-magnet rotor rotates with the pivot to be connected, be provided with outer air gap between outer permanent-magnet rotor and the stator, be provided with interior air gap between interior squirrel-cage rotor and the outer permanent-magnet rotor. An outer permanent magnet rotor is added in a traditional squirrel-cage induction generator and provides adjustable excitation, so that the power factor and the power density of the running of the generator are improved, the rotating speed of the generator can be adjusted within a wide range, the outer permanent magnet rotor can rotate freely, the rotating speed of the outer permanent magnet rotor and a synchronous rotating magnetic field generated by a stator winding are overlapped, and the current of a stator winding of the generator is reduced.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a double-rotor generator and a control method thereof.
Background
The three-phase asynchronous generator has the advantages of simple structure, firmness, durability, small maintenance amount and the like, so that the three-phase asynchronous generator is widely applied to the field of industrial and agricultural production. However, the power factor of the three-phase asynchronous generator is lagging, so that more reactive power needs to be obtained from the power grid, and the low power factor when the generator is in light load causes the consumed electric energy to be quite large. Along with the gradual enhancement of energy conservation and emission reduction and environmental protection and energy conservation awareness, the improvement of the efficiency of the three-phase asynchronous generator becomes more and more urgent. This is a disadvantage of the prior art.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art is insufficient, and provides a double-rotor generator and a working method thereof.
The scheme is realized by the following technical measures: the utility model provides a birotor generator, includes the casing, the casing rotates and is connected with the pivot, fixedly connected with stator in the casing, squirrel-cage rotor in the pivot fixedly connected with, be provided with outer permanent-magnet rotor between stator and the interior squirrel-cage rotor, outer permanent-magnet rotor rotates with the pivot to be connected, be provided with outer air gap between outer permanent-magnet rotor and the stator, be provided with interior air gap between interior squirrel-cage rotor and the outer permanent-magnet rotor. By adopting the technical scheme, the outer permanent magnet rotor is additionally arranged in the traditional squirrel-cage induction generator and provides adjustable excitation, so that the power factor and the power density of the operation of the generator are improved, the rotating speed of the generator can be adjusted within a wide range, the outer permanent magnet rotor can rotate freely, the rotating speed of the outer permanent magnet rotor and a synchronous rotating magnetic field generated by a stator winding are mutually overlapped, the current of a stator winding of the generator is reduced, an outer air gap is formed between the outer permanent magnet rotor and the stator, an inner air gap is formed between the inner squirrel-cage rotor and the outer permanent magnet rotor, the effective air gap area of the generator is increased by the formation of the outer air gap and the inner air gap, and the torque density and the air gap area of the generator are in direct proportion, so that the torque density of the generator is improved, and the energy-saving operation of.
Preferably, the outer permanent magnet rotor is excited by a permanent magnet and direct current together. By adopting the technical scheme, the torque density and the air gap magnetic density value of the generator are in direct proportion, the outer permanent magnet type rotor adopts the mixed excitation of the permanent magnet and the direct current, and the air gap magnetic density value is increased compared with a conventional generator with the same capacity under the condition of the same stator voltage power supply, so that the torque density of the generator is improved.
Preferably, the outer permanent magnet rotor is rotatably connected with the rotating shaft through an outer permanent magnet rotor support, the outer permanent magnet rotor comprises an outer permanent magnet rotor core, a magnetic conductive material, a permanent magnet and an outer permanent magnet rotor excitation winding, the magnetic conductive material is fixedly installed on the surface of the outer permanent magnet rotor core, the permanent magnet is fixedly installed on the magnetic conductive material, the outer permanent magnet rotor excitation winding is installed in an outer permanent magnet rotor core groove, the outer permanent magnet rotor excitation winding is a direct current excitation winding, and the outer permanent magnet rotor excitation winding is connected with the exciter through a rectifying device. By adopting the technical scheme, two air gaps are arranged on the inner side and the outer side of the outer permanent magnet rotor, a magnetic flux linkage generated by the permanent magnet and a magnetic field linkage generated by the stator winding and the inner squirrel cage rotor simultaneously provide a rotating magnetic field together, and the exciter is an armature rotation type generator and excites the excitation winding of the outer permanent magnet rotor through a rectifying device.
Preferably, the exciter includes an exciter stator and an exciter rotor, the exciter stator is fixedly disposed on an exciter stator support, the exciter rotor is disposed on an exciter rotor support, the exciter rotor support and the rectifying device are both fixedly disposed on an outer permanent magnet rotor support, the outer permanent magnet rotor support is fixedly connected to the outer permanent magnet rotor, the exciter rotor is connected to the rectifying device through a wire, and the rectifying device is connected to an excitation winding of the outer permanent magnet rotor through a wire. By adopting the technical scheme, the exciter rotor and the rectifying device are fixedly arranged on the outer permanent magnet type rotor bracket and rotate together with the outer permanent magnet type rotor.
Preferably, the inner permanent magnet rotor is not connected with a load, the inner squirrel cage rotor drives the load to operate through the rotating shaft, the number of poles of the outer permanent magnet rotor is consistent with that of the stator, and the magnetizing direction of the permanent magnet is radial.
Preferably, the stator comprises a stator core and a stator winding, the stator core is fixed on the casing, the stator winding is installed in a stator core slot, and the stator winding is a three-phase symmetrical alternating current winding.
Preferably, when the stator winding is supplied with symmetrical three-phase alternating current, under the action of the three-phase rotating magnetic field, the rotating direction of the inner squirrel-cage rotor and the outer permanent magnet rotor is the same as the rotating direction of the rotating magnetic field.
Preferably, the inner squirrel-cage rotor and the outer permanent magnet rotor are coaxial, and the inner squirrel-cage rotor comprises an inner squirrel-cage rotor iron core and rotor squirrel-cage bars.
A control method of a double-rotor generator divides the operation area of the double-rotor generator into a low-speed area and a high-speed area according to the characteristics and the operation characteristics of the double-rotor generator, wherein the low-speed area generally adopts the magnetization control, and the high-speed area generally adopts the flux weakening control.
Preferably, the large torque is provided by the magnetization of the excitation winding of the outer permanent magnet rotor, the short-time overload capacity of the generator is improved, the torque real-time information is acquired by adopting a torque detection device, when the load torque is less than or equal to the rated torque of the generator, the magnetization control is not needed, and at the moment, the excitation current in the excitation winding of the outer permanent magnet rotori f= 0; when load torque TLGreater than the rated torque T of the generatorNIn this case, the field current in the field winding of the outer permanent magnet rotor needs to be controlled by increasing the field strengthi fThe direction of the generated magnetic field is consistent with the direction of the magnetic field of the stator winding and the permanent magnet, so that the purpose of increasing the magnetism is achieved;
the speed regulation range is widened by the weak magnetism of the excitation winding of the outer permanent magnet type rotor. The speed detection device is adopted to acquire real-time information of the rotating speed, when the generator runs in a high-speed area, namely the rotating speed of the generator is greater than the weak magnetic basic speed, the stator of the generator can reach a limit voltage value, and if the production process requires that the load continues to increase the rotating speed, the rotating speed can be continuously increased by adjusting the exciting current in the exciting winding of the outer permanent magnet type rotori fThe direction of the magnetic field of the permanent magnet is opposite to the direction of the magnetic field of the stator winding and the permanent magnet, so that the size of a synthetic flux linkage is reduced, namely the purpose of outputting higher rotating speed is achieved through weak magnetic control.
The double-rotor generator adopts the double-rotor structure of the inner squirrel-cage rotor and the outer permanent magnet rotor, so that the air gap magnetic density of the inner squirrel-cage rotor and the outer permanent magnet rotor is improved, the yoke magnetic density of the inner squirrel-cage rotor and the outer permanent magnet rotor is reduced, the running efficiency and the torque density of the generator are improved, the air gap magnetic densities of the inner squirrel-cage rotor and the outer permanent magnet rotor are distributed in a sine mode, and the potential of a stator winding can be guaranteed to be distributed in a sine mode. If the load is increased, the exciting current can be adjusted to enhance the air gap flux density, so that the output torque of the generator is improved to increase the load carrying capacity; when the load is rated or light, the exciting current is zero; when emergency braking is needed or the torque is suddenly reduced, the direction of current in the excitation winding of the outer permanent magnet rotor is changed to reduce the air gap flux density, so that the generator can stably run, and vibration and noise are reduced; when the generator is started with a load, the air gap magnetic field can be enhanced by adjusting the size and the direction of the exciting current, the starting torque of the generator is improved, and meanwhile, the time required by the starting process is reduced.
Compared with the prior art, the invention has the following beneficial effects:
(1) the outer permanent magnet type rotor can rotate freely, the rotating speed of the outer permanent magnet type rotor and a synchronous rotating magnetic field generated by a stator winding are mutually overlapped, on one hand, the current of the stator winding of the generator is reduced, on the other hand, the size and the direction of the exciting current are adjusted according to the change of the load, so that the air gap flux density of the generator is changed, the purposes of increasing the magnetism and weakening the magnetism are achieved, and the high-efficiency and energy-saving operation of the generator is facilitated.
(2) For variable load equipment such as a fan, a pump and the like, the driving system flexibly adjusts the air gap flux density by detecting the load torque or the rotating speed, so that the rotating speed and the torque output by the generator are changed, and the purposes of saving energy and reducing consumption can be achieved.
(3) The outer permanent magnet type rotor is excited by adopting permanent magnet and direct current together, and the air gap magnetic field can be adjusted more flexibly through the design of a control algorithm of the driving system, so that the power factor of the generator can be operated in three states of lag, lead and unit power factor according to the actual operation state of the generator, and the overall operation efficiency of the generator is further improved.
In summary, aiming at the problem that the existing generator absorbs a large amount of reactive power from the power grid during operation and is not beneficial to the stability of the power grid, compared with the conventional asynchronous generator structure, the double-rotor generator provided by the invention can flexibly adjust the torque, the rotating speed and the power factor according to the change condition of the load, reduces the disturbance to the power grid, and is beneficial to the stable operation of the power grid and energy conservation.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
FIG. 1 is a schematic axial cross-sectional structure of a dual rotor generator according to the present invention;
FIG. 2 is a schematic view of a radial cross-section of a dual rotor generator according to the present invention;
FIG. 3 is a schematic diagram of the operating characteristics of a dual rotor generator of the present invention;
fig. 4 is a block diagram of a control system of the dual rotor generator of the present invention.
In the figure: 1-shell, 2-stator core, 3-outer air gap, 4-inner squirrel cage rotor, 5-stator winding, 6-outer permanent magnet rotor support, 7-inner air gap, 8-permanent magnet, 9-outer permanent magnet rotor excitation winding, 10-outer permanent magnet rotor, 11-outer permanent magnet rotor bearing, 12-shell bearing, 13-exciter, 14-exciter stator support, 15-exciter stator, 16-exciter rotor, 17-exciter rotor support, 18-rectifier, 19-rotating shaft, 20-annular channel.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the following explains the present solution by way of specific embodiments and with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, a dual-rotor generator comprises a housing 1, wherein the housing 1 is rotatably connected with a rotating shaft 19, a stator is fixedly connected in the housing 1 and comprises a stator core 2 and a stator winding 5, the stator core 2 is fixed on the housing 1, the stator winding 5 is arranged in a stator core 2 groove, the stator winding 5 is a three-phase symmetrical alternating current winding, the rotating shaft 19 is fixedly connected with an inner squirrel-cage rotor 4, the inner squirrel-cage rotor 4 comprises an inner squirrel-cage rotor core and rotor squirrel-cage bars, the inner squirrel-cage rotor 4 is fixedly connected with the rotating shaft 19, an outer permanent-magnet rotor 10 is arranged between the stator and the inner squirrel-cage rotor 4, the stator is arranged at the outer side of the outer permanent-magnet rotor 10, the outer permanent-magnet rotor 10 is rotatably connected with the rotating shaft 19, the inner squirrel-cage rotor 4 and the outer permanent-magnet rotor 10, an outer air gap 3 is arranged between the outer permanent magnet rotor 10 and the stator, and an inner air gap 7 is arranged between the inner squirrel cage rotor 4 and the outer permanent magnet rotor 10.
The outer permanent magnet rotor 10 is excited by the permanent magnet 8 and direct current. The torque density and the air gap magnetic density value of the generator are in direct proportion, the outer permanent magnet type rotor 10 adopts mixed excitation of permanent magnets and direct current, and under the condition of same stator voltage power supply, compared with a conventional generator with the same capacity, the air gap magnetic density value is increased, so that the torque density of the generator is improved.
The outer permanent magnet rotor 10 is rotatably connected with the rotating shaft 19 through an outer permanent magnet rotor support 6, the outer permanent magnet rotor 10 comprises an outer permanent magnet rotor core, a magnetic conductive material, a permanent magnet 8 and an outer permanent magnet rotor excitation winding 9, the magnetic conductive material is fixedly installed on the surface of the outer permanent magnet rotor core, the permanent magnet 8 is fixedly installed on the magnetic conductive material, the outer permanent magnet rotor excitation winding 9 is installed in an outer permanent magnet rotor core groove, the outer permanent magnet rotor excitation winding 9 is a direct-current excitation winding, and the outer permanent magnet rotor excitation winding 9 is connected with the exciter 13 through a rectifying device 18. Two air gaps of an inner air gap 7 and an outer air gap 3 exist on two sides of the outer permanent magnet rotor 10, a magnetic flux linkage generated by the permanent magnet 8 and a magnetic field linkage generated by the stator winding 5 and the inner squirrel cage rotor 4 simultaneously provide a rotating magnetic field together, the exciter 13 is an armature rotation type generator and is excited by the outer permanent magnet rotor excitation winding 9 through the rectifying device 18.
The right end of the outer permanent magnet rotor support 6 is arranged in the casing 1, the left end of the outer permanent magnet rotor support is arranged outside the casing 1, an annular channel 20 used for rotating the outer permanent magnet rotor support 6 is arranged on an end cover at the left end of the casing 1, and a wire connecting the outer permanent magnet rotor excitation winding 9 and the rectifying device 18 can penetrate through the end cover at the left end of the casing 1 through the annular channel 20.
The exciter 13 includes an exciter stator 15 and an exciter rotor 16, the exciter stator 15 is fixedly disposed on an exciter stator support 14, the exciter rotor 16 is disposed on an exciter rotor support 17, the exciter rotor support 17 and a rectifying device 18 are both fixedly disposed on an outer permanent magnet rotor support 6, the outer permanent magnet rotor support 6 is fixedly connected to an outer permanent magnet rotor 10, the outer permanent magnet rotor support 6 is connected to a rotating shaft 19 through an outer permanent magnet rotor bearing 11, the exciter rotor 16 is connected to the rectifying device 18 through a lead, the rectifying device 18 is connected to an outer permanent magnet rotor exciting winding 9 through a lead, and the exciter rotor 16 and the rectifying device 18 are both fixedly mounted on the outer permanent magnet rotor support 6 to rotate together with the outer permanent magnet rotor 10.
In the technical scheme, the outer permanent magnet rotor 10 is not connected with a load, the inner squirrel-cage rotor 4 drives the load to operate through the rotating shaft 19, the number of poles of the outer permanent magnet rotor 10 is consistent with that of the stator, and the magnetizing direction of the permanent magnet 8 is radial; when the stator winding 5 is fed with symmetrical three-phase alternating current, the rotating directions of the inner squirrel-cage rotor 4 and the outer permanent magnet rotor 10 are the same as the rotating direction of the rotating magnetic field under the action of the three-phase rotating magnetic field.
The invention is characterized in that an outer permanent magnet rotor 10 which is coaxially arranged with an inner squirrel-cage rotor 4 is added between a stator and the inner squirrel-cage rotor of the traditional squirrel-cage induction generator, the outer permanent magnet rotor 10 provides adjustable excitation, the power factor and the power density of the running of the generator can be improved, the rotating speed of the generator can be adjusted in a wider range, the outer permanent magnet rotor 10 can rotate freely, the rotating speed and a synchronous rotating magnetic field generated by a stator winding 5 are mutually overlapped, the current of a stator winding 5 of the generator is reduced, an outer air gap 3 is arranged between the outer permanent magnet rotor 10 and the stator, an inner air gap 7 is arranged between the inner squirrel-cage rotor 4 and the outer permanent magnet rotor 10, the outer air gap 3 and the inner air gap 7 are formed to increase the effective air gap area of the generator, and the torque density and the air gap area of the generator are in direct proportion, thereby improving the torque density of the generator and being beneficial to the energy-saving operation of the generator.
As can be seen from fig. 4, the key of the dual-rotor generator and the control method thereof is to properly coordinate and control the armature current and the exciting current to meet specific performance indexes of different variable speed drive systems, such as improvement of short-time overload capability or adjustment of a wider range of rotating speed.
Example 2
According to the characteristics and the operation characteristics of the double-rotor generator, the operation area of the double-rotor generator is divided into a low-speed area and a high-speed area, as shown in fig. 3.
In the low speed region, the magnetization increasing control is generally adopted, and in the high speed region, the weak magnetic control is generally adopted. The operation control of the driving system can adopt the following magnetism increasing control or magnetism weakening control:
and (3) magnetizing control: the torque detection device is adopted to collect the real-time torque information, when the load torque is less than or equal to the rated torque of the generator, the magnetization control is not needed, namely, the exciting current in the outer permanent magnet rotor exciting winding 9 is at the momentI f= 0; when load torque TLGreater than the rated torque T of the generatorNThen, the control of increasing the magnetic field is needed, and the exciting current in the exciting winding 9 of the outer permanent magnet rotor is at the momentI fThe direction of the generated magnetic field is consistent with the direction of the magnetic field of the stator winding 5 and the permanent magnet 8, so that the purpose of increasing the magnetism is achieved.
And (3) field weakening control: the speed regulation range is widened by the weak magnetism of the outer permanent magnet rotor excitation winding 9, the speed detection device is adopted to collect real-time information of the rotating speed, when the generator runs in a high-speed area, namely the rotating speed of the generator is greater than the weak magnetic basic speed, the stator of the generator can reach a limit voltage value, and if the load is required by the production process to continuously increase the rotating speed, the exciting current in the outer permanent magnet rotor excitation winding 9 can be regulated at the momentI fThe direction of the magnetic field is opposite to the direction of the magnetic field of the stator winding 5 and the permanent magnet 8, so that the size of the synthetic flux linkage is reduced, namely the purpose of outputting higher rotating speed is achieved through weak magnetic control.
The technical features of the present invention that are not described in the present invention can be implemented by or using the prior art, and are not described herein again, of course, the above description is not limited to the present invention, and the present invention is not limited to the above embodiments, and variations, modifications, additions or substitutions that are made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a birotor generator, includes casing (1), casing (1) rotates and is connected with pivot (19), fixedly connected with stator in casing (1), squirrel-cage rotor (4), characterized by in pivot (19) fixedly connected with: an outer permanent magnet rotor (10) is additionally arranged in the squirrel-cage induction generator, the outer permanent magnet rotor (10) is arranged between a stator and an inner squirrel-cage rotor (4), the outer permanent magnet rotor (10) is rotationally connected with a rotating shaft (19), an outer air gap (3) is arranged between the outer permanent magnet rotor (10) and the stator, and an inner air gap (7) is arranged between the inner squirrel-cage rotor (4) and the outer permanent magnet rotor (10); the outer permanent magnet rotor (10) is excited by a permanent magnet (8) and an outer permanent magnet rotor excitation winding (9) together;
the outer permanent magnet type rotor (10) is rotatably connected with the rotating shaft (19) through an outer permanent magnet type rotor support (6), the outer permanent magnet type rotor (10) comprises an outer permanent magnet type rotor core, a magnetic conductive material, a permanent magnet (8) and an outer permanent magnet type rotor excitation winding (9), the magnetic conductive material is fixedly installed on the surface of the outer permanent magnet type rotor core, the permanent magnet (8) is fixedly installed on the magnetic conductive material, the outer permanent magnet type rotor excitation winding (9) is installed in an outer permanent magnet type rotor core groove, the outer permanent magnet type rotor excitation winding (9) is a direct current excitation winding, and the outer permanent magnet type rotor excitation winding (9) is connected with the exciter (13) through a rectifying device (18);
the exciter (13) comprises an exciter stator (15) and an exciter rotor (16), the exciter stator (15) is fixedly arranged on an exciter stator support (14), the exciter rotor (16) is arranged on an exciter rotor support (17), the exciter rotor support (17) and a rectifying device (18) are fixedly arranged on an outer permanent magnet rotor support (6), the outer permanent magnet rotor support (6) is fixedly connected with an outer permanent magnet rotor (10), the outer permanent magnet rotor support (6) is connected with a rotating shaft (19) through an outer permanent magnet rotor bearing (11), the exciter rotor (16) is connected with the rectifying device (18) through a conducting wire, and the rectifying device (18) is connected with an outer permanent magnet rotor excitation winding (9) through a conducting wire;
the outer permanent magnet rotor (10) is not connected with a load, the inner squirrel-cage rotor (4) drives the load to operate through a rotating shaft (19), the number of poles of the outer permanent magnet rotor (10) is consistent with that of the stator, and the magnetizing direction of the permanent magnet (8) is radial;
the stator comprises a stator core (2) and a stator winding (5), the stator core (2) is fixed on the casing (1), the stator winding (5) is arranged in a slot of the stator core (2), and the stator winding (5) is a three-phase symmetrical alternating current winding;
when the stator winding (5) is introduced with symmetrical three-phase alternating current, under the action of a three-phase rotating magnetic field, the rotating directions of the inner squirrel-cage rotor (4) and the outer permanent magnet rotor (10) are the same as the rotating direction of the rotating magnetic field;
the inner squirrel-cage rotor (4) and the outer permanent magnet rotor (10) are coaxial, and the inner squirrel-cage rotor (4) comprises an inner squirrel-cage rotor iron core and rotor squirrel-cage bars.
2. A control method using the double-rotor generator of claim 1, characterized in that: according to the characteristics and the operation characteristics of the double-rotor generator, the operation area of the double-rotor generator is divided into a low-speed area and a high-speed area, the low-speed area adopts magnetization increasing control, and the high-speed area adopts weak magnetic control;
the torque is increased by the magnetization of the outer permanent magnet rotor excitation winding (9), the short-time overload capacity of the generator is improved, the torque real-time information is acquired by the torque detection device, and when the load torque is less than or equal to the rated torque of the generator, the magnetization control is not needed, namely, the excitation current in the inner permanent magnet rotor excitation winding (9) at the momenti f= 0; when load torque TLGreater than the rated torque T of the generatorNIn the meantime, the magnetization control is required, and the exciting current in the exciting winding (9) of the outer permanent magnet rotor at the momenti fThe direction of the generated magnetic field is consistent with the directions of the magnetic fields of the stator winding (5) and the permanent magnet (8), so that the purpose of increasing the magnetism is achieved;
the speed regulation range is widened by the weak magnetism of the outer permanent magnet rotor excitation winding (9), the speed detection device is adopted to collect real-time information of the rotating speed, when the generator runs at a high-speed area, namely the rotating speed of the generator is greater than the weak magnetic basic speed, the stator of the generator can reach a limit voltage value, and if the load is required by the production process to continue to increase the rotating speed, the rotating speed can be increased by adjusting the excitation current in the outer permanent magnet rotor excitation winding (9)i fThe direction of the magnetic field of the magnetic coil is opposite to the direction of the magnetic field of the stator winding (5) and the permanent magnet (8), so that the size of the composite flux linkage is reduced.
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| CN111884423B (en) * | 2020-07-31 | 2022-11-04 | 杨世国 | Self-adaptive excitation permanent magnet generator system |
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| CN100533926C (en) * | 2007-03-15 | 2009-08-26 | 安鲁荣 | Electric power generator |
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Inventor after: Diao Tongshan Inventor after: Yan Zhiguo Inventor after: Liu Jiahe Inventor after: Wang Yan Inventor before: Diao Tongshan Inventor before: Liu Jiahe Inventor before: Wang Yan |
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Application publication date: 20191122 Assignee: Shandong Rongtang Electric Power Technology Co.,Ltd. Assignor: Qilu University of Technology Contract record no.: X2023980048595 Denomination of invention: A dual rotor generator and its control method Granted publication date: 20210226 License type: Common License Record date: 20231205 |