CN110492710A - A kind of birotor generator and its control method - Google Patents

A kind of birotor generator and its control method Download PDF

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Publication number
CN110492710A
CN110492710A CN201910892979.0A CN201910892979A CN110492710A CN 110492710 A CN110492710 A CN 110492710A CN 201910892979 A CN201910892979 A CN 201910892979A CN 110492710 A CN110492710 A CN 110492710A
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China
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permanent magnet
rotor
magnet rotor
outer permanent
stator
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CN201910892979.0A
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CN110492710B (en
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刁统山
刘加和
王艳
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Qilu University of Technology
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Qilu University of Technology
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/46Motors having additional short-circuited winding for starting as an asynchronous motor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field

Abstract

A kind of birotor generator, including casing, the casing is rotatably connected to shaft, stator is fixedly connected in the casing, the shaft is fixedly connected with interior cage rotor, and outer permanent magnet rotor is provided between the stator and interior cage rotor, and the outer permanent magnet rotor and shaft are rotatablely connected, it is provided with outer air gap between the outer permanent magnet rotor and stator, is provided with interior air gap between the interior cage rotor and outer permanent magnet rotor.Increase an outer permanent magnet rotor inside traditional squirrel-cage influence generator, the outer permanent magnet rotor provides adjustable excitation, to improve the power factor and power density of generator operation, regulator generator revolving speed in a wider range can also be met, the outer permanent magnet rotor is freely rotatable, the synchronous rotary magnetic field that its rotation speed and stator winding generate is mutually superimposed, reduces the electric current of generator unit stator winding.

Description

A kind of birotor generator and its control method
Technical field
The present invention relates to the technical field of generator, particularly a kind of birotor generator and its control method.
Background technique
Three phase induction generator is due to having many advantages, such as that structure is simple, sturdy and durable and maintenance is small, so that it is extensive Applied to industrial and agricultural production field.But three phase induction generator power factor lags, and thus needs to obtain from power grid more Reactive power, in addition when to be in the low electric energy for expending it of power factor at light load quite big for generator.With energy conservation What emission reduction and environmental protection and energy saving were realized gradually increases, and the efficiency for improving three phase induction generator becomes more more and more urgent.This is existing The shortcoming of technology.
Summary of the invention
The technical problems to be solved by the invention aiming at deficiency of the prior art, and provide a kind of double turns Sub- generator and its working method increase an outer permanent magnetism between traditional squirrel-cage influence generator stator and cage rotor Formula rotor, the outer permanent magnet rotor provide adjustable excitation, and the power factor and function of generator operation not only can be improved Rate density, and can satisfy regulator generator revolving speed in a wider range.
This programme is achieved by the following technical measures: a kind of birotor generator, including casing, and the casing turns It is dynamic to be connected with shaft, stator is fixedly connected in the casing, the shaft is fixedly connected with interior cage rotor, the stator Be provided with outer permanent magnet rotor between interior cage rotor, the outer permanent magnet rotor and shaft are rotatablely connected, it is described it is outer forever It is provided with outer air gap between magnetic type rotor and stator, is provided with interior gas between the interior cage rotor and outer permanent magnet rotor Gap.Using the technical program, increase an outer permanent magnet rotor, the outer magneto inside traditional squirrel-cage influence generator Rotor provides adjustable excitation, to improve the power factor and power density of generator operation, can also meet compared with Regulator generator revolving speed in wide scope, the outer permanent magnet rotor are freely rotatable, what rotation speed and stator winding generated Synchronous rotary magnetic field is mutually superimposed, reduces the electric current of generator unit stator winding, has between the outer permanent magnet rotor and stator Outer air gap, there is interior air gap between the interior cage rotor and outer permanent magnet rotor, the formation of the outer air gap and interior air gap increases The big effective air gap area of generator, the torque density and air gap surface area of the generator are directly proportional, to improve hair The torque density of motor is conducive to the energy-saving run of generator.
Preferably, the outer permanent magnet rotor uses permanent magnet and the common excitation of direct current.Using the technical program, power generation The torque density and air gap flux density value of machine are directly proportional, and the outer permanent magnet rotor uses permanent magnet and direct current composite excitation, In Under identical stator voltage electric power thus supplied, compared with the conventional generator with capacity, air gap flux density value is increased, to improve hair The torque density of motor.
Preferably, the outer permanent magnet rotor is rotatably connected by outer permanent magnet rotor bracket with shaft, it is described it is outer forever Magnetic type rotor includes outer permanent magnet rotor iron core, permeability magnetic material, permanent magnet and outer permanent magnet rotor excitation winding, the magnetic conduction material Material is fixedly mounted on the surface of outer permanent magnet rotor iron core, and the permanent magnet is fixedly mounted on permeability magnetic material, the outer permanent magnetism Formula rotor field coil is mounted in outer permanent magnet rotor iron core slot, the outer permanent magnet rotor excitation winding be DC excitation around Group, the outer permanent magnet rotor excitation winding are connect by fairing with exciter.Using the technical program, the outer permanent magnetism There are the magnetic that two air gaps, the magnetic linkage of permanent magnet generation are generated with stator winding and interior cage rotor simultaneously inside and outside formula rotor Field linkage, provides rotating excitation field jointly, and the exciter is the revolving generator of armature, is outer magneto by fairing Rotor field coil excitation.
Preferably, the exciter includes exciter stator and exciter rotor, and the exciter stator is fixed at On exciter stator bracket, the exciter rotor is arranged on exciter rotor bracket, the exciter rotor bracket and Fairing is fixedly installed on outer permanent magnet rotor bracket, and the outer permanent magnet rotor bracket is fixed with outer permanent magnet rotor Connection, the exciter rotor are connect by conducting wire with fairing, and the fairing passes through conducting wire and outer permanent magnet rotor Excitation winding connection.Using the technical program, the exciter rotor and fairing are fixedly mounted and turn in outer magneto It is rotated together with outer permanent magnet rotor on submounts.
Preferably, the interior permanent magnet rotor does not connect load, and the interior cage rotor drives load running by shaft, The number of poles of the outer permanent magnet rotor is consistent with the number of poles of stator, and the magnetizing direction of the permanent magnet is radial.
Preferably, the stator includes stator core and stator winding, and the stator core is fixed on casing, described fixed Sub- winding is installed in stator core slot, and the stator winding is that three-phase symmetrical exchanges winding.
Preferably, when stator winding is passed through symmetrical three-phase alternating current, under the action of three phase rotating field, interior squirrel-cage Rotor and outer permanent magnet rotor rotation direction are identical as rotating excitation field direction of rotation.
Preferably, the interior cage rotor and outer permanent magnet rotor are concentric, and the interior cage rotor includes interior mouse Cage rotor iron core and rotor cage item.
A kind of control method of birotor generator, according to the characteristic and operation characteristic of the birotor generator, by it Operation area is divided into low regime and high velocity, generallys use increasing magnetic control in low regime, generallys use weak magnetic control in high velocity.
Preferably, magnetic is increased to provide big torque by outer permanent magnet rotor excitation winding, improves the mistake in short-term of generator Loading capability acquires torque real time information using torque master, when load torque is less than or equal to the nominal torque of generator, It does not need to increase magnetic control, at this time the exciting current in outer permanent magnet rotor excitation windingi f=0;As load torque TLGreater than generator Nominal torque TNWhen, it is necessary to increase magnetic control, that is to say, that the exciting current in outer permanent magnet rotor excitation winding at this timei fIt produces Raw magnetic direction is consistent with stator winding and permanent magnet magnetic field direction, achievees the purpose that increase magnetic;
Speed adjustable range is widened by outer permanent magnet rotor excitation winding weak magnetic.Believed in real time using speed detector acquisition revolving speed Breath, when generator operates in high velocity, i.e., generator speed is greater than weak magnetic base speed, and the stator of the generator can reach capacity Voltage value at this time can be by adjusting outer permanent magnet rotor excitation winding if manufacturing technique requirent load continues to increase speed In exciting currenti fDirection, it is contrary with stator winding and magnetic field of permanent magnet to make its magnetic direction, to reduce synthesis The size of magnetic linkage, i.e. weak magnetic control to achieve the purpose that export higher rotation speed.
Birotor generator of the invention uses interior cage rotor and outer permanent magnet rotor dual-rotor structure, not only makes interior The air gap flux density of cage rotor and outer permanent magnet rotor improves, and makes interior cage rotor and outer permanent magnet rotor yoke portion flux density It reduces, to improve the operational efficiency and torque density of generator, and makes interior cage rotor and outer permanent magnet rotor air gap Flux density is in Sine distribution, and stator winding potential can be guaranteed in Sine distribution.If load increases, adjustable exciting current comes Enhance air gap flux density, to improve the output torque of generator to increase carrying load ability;When nominal load or at light load, excitation Electric current is zero;When emergency braking or torque being needed to reduce suddenly, change sense of current in outer permanent magnet rotor excitation winding, Reduce air gap flux density, generator even running can be made, reduces vibration and noise;It, can be with when the starting of generator bringing onto load Enhance air-gap field by adjusting the size and Orientation of exciting current, improves the detent torque of generator, while reducing starting The time that process needs.
Compared with the prior art, the invention has the following beneficial effects:
(1) outer permanent magnet rotor is freely rotatable, and the synchronous rotary magnetic field of rotation speed and stator winding generation is mutually superimposed, On the one hand reduce the electric current of generator unit stator winding, on the other hand according to the variation of load, adjust exciting current size and Direction is conducive to the efficient and energy saving of generator to change the air gap flux density of generator to achieve the purpose that increase magnetic and weak magnetic Operation.
(2) for blower and the pump varying loads equipment such as class, drive system by detection load torque or the size of revolving speed come Flexible modulation air gap flux density can achieve energy-saving purpose to change revolving speed and the torque of generator output.
(3) the outer permanent magnet rotor uses permanent magnetism and the common excitation of direct current, passes through setting for drive system control algolithm Meter, can adjust air-gap field more flexiblely, allow the power factor of generator according to the actual motion shape of generator State makes it operate in lag, advanced and three kinds of states of unity power factor, and then improves the overall operation efficiency of generator.
In conclusion absorbing a large amount of reactive power from power grid when for the operation of existing generator, it is unfavorable for the steady of power grid Fixed, birotor generator provided by the invention, can be flexible according to the change conditions of load compared with conventional asynchronous electric generator structure Torque, revolving speed and power factor are adjusted, the disturbance to power grid is reduced, not only improves power grid operation, be also beneficial to energy conservation.
It can be seen that compared with prior art, the present invention implementing with substantive distinguishing features outstanding and significant progress Beneficial effect be also obvious.
Detailed description of the invention
Fig. 1 is birotor generator axial cross section structural schematic diagram of the present invention;
Fig. 2 is birotor generator radial section structural schematic diagram of the present invention;
Fig. 3 is birotor generator operation characteristic schematic diagram of the present invention;
Fig. 4 is birotor generator Control system architecture block diagram of the present invention.
In figure: 1- casing, 2- stator core, the outer air gap of 3-, cage rotor in 4-, 5- stator winding, the outer magneto of 6- Rotor field spider, air gap in 7-, 8- permanent magnet, the outer permanent magnet rotor excitation winding of 9-, the outer permanent magnet rotor of 10-, the outer magneto of 11- Rotor bearing, 12- casing bearing, 13- exciter, 14- exciter stator bracket, 15- exciter stator, 16- exciter rotor, 17- exciter rotor bracket, 18- fairing, 19- shaft, the circular passage 20-.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to we Case is illustrated.
Embodiment 1
As depicted in figs. 1 and 2, a kind of birotor generator, including casing 1, the casing 1 is rotatably connected to shaft 19, described Stator is fixedly connected in casing 1, the stator includes stator core 2 and stator winding 5, and the stator core 2 is fixed on machine On shell 1, the stator winding 5 is installed in 2 slot of stator core, the stator winding 5 be three-phase symmetrical exchange winding, described turn Axis 19 is fixedly connected with interior cage rotor 4, and the interior cage rotor 4 includes interior cage rotor iron core and rotor cage Item, the interior cage rotor 4 are fixedly connected with shaft 19, and outer permanent magnetism is provided between the stator and interior cage rotor 4 The outside of outer permanent magnet rotor 10 is arranged in formula rotor 10, the stator, and the outer permanent magnet rotor 10 connects with the rotation of shaft 19 It connects, the interior cage rotor 4 and outer permanent magnet rotor 10 are concentric, are provided between the outer permanent magnet rotor 10 and stator Outer air gap 3 is provided with interior air gap 7 between the interior cage rotor 4 and outer permanent magnet rotor 10.
The outer permanent magnet rotor 10 uses permanent magnet 8 and the common excitation of direct current.The torque density of the generator and Air gap flux density value is directly proportional, and the outer permanent magnet rotor 10 uses permanent magnet and direct current composite excitation, in identical stator voltage Under electric power thus supplied, compared with the conventional generator with capacity, air gap flux density value is increased, so that the torque for improving generator is close Degree.
The outer permanent magnet rotor 10 is rotatably connected by outer permanent magnet rotor bracket 6 with shaft 19, the outer permanent magnetism Formula rotor 10 includes outer permanent magnet rotor iron core, permeability magnetic material, permanent magnet 8 and outer permanent magnet rotor excitation winding 9, the magnetic conduction Material is fixedly mounted on the surface of outer permanent magnet rotor iron core, and the permanent magnet 8 is fixedly mounted on permeability magnetic material, it is described it is outer forever Magnetic type rotor excitation winding 9 is mounted in outer permanent magnet rotor iron core slot, and the outer permanent magnet rotor excitation winding 9 is encouraged for direct current Magnetic winding, the outer permanent magnet rotor excitation winding 9 are connect by fairing 18 with exciter 13.The outer permanent magnet rotor There are 3 two air gaps of interior air gap 7 and outer air gap, the magnetic linkage that permanent magnet 8 generates turns with stator winding 5 and interior mouse cage simultaneously for 10 two sides The magnetic field linkage that son 4 generates, provides rotating excitation field, the exciter 13 is the revolving generator of armature, through over commutation jointly Device 18 is outer 9 excitation of permanent magnet rotor excitation winding.
The right end of the outer permanent magnet rotor bracket 6 is arranged in casing 1, and the left end of the outer permanent magnet rotor bracket is set It sets outside casing 1, the circular passage for the rotation of outer permanent magnet rotor bracket 6 is provided on the end cap of 1 left end of casing 20, the conducting wire for connecting outer permanent magnet rotor excitation winding 9 and fairing 18 can be by circular passage 20 through 1 left end of casing End cap.
The exciter 13 includes exciter stator 15 and exciter rotor 16, and the exciter stator 15 is fixed at On exciter stator bracket 14, the exciter rotor 16 is arranged on exciter rotor bracket 17, the exciter rotor branch Frame 17 and fairing 18 are fixedly installed on outer permanent magnet rotor bracket 6, the outer permanent magnet rotor bracket 6 with it is outer forever Magnetic type rotor 10 is fixedly connected, and the outer permanent magnet rotor bracket 6 is connect by outer permanent magnet rotor bearing 11 with shaft 19, institute It states exciter rotor 16 to connect by conducting wire with fairing 18, the fairing 18 is encouraged by conducting wire and outer permanent magnet rotor Magnetic winding 9 connects, and the exciter rotor 16 and fairing 18 are fixedly mounted on outer permanent magnet rotor bracket 6 with outside Permanent magnet rotor 10 rotates together.
In the technical scheme, the outer permanent magnet rotor 10 does not connect load, and the interior cage rotor 4 passes through shaft 19 Load running is driven, the number of poles of the outer permanent magnet rotor 10 is consistent with the number of poles of stator, and the magnetizing direction of the permanent magnet 8 is It is radial;When stator winding 5 is passed through symmetrical three-phase alternating current, under the action of three phase rotating field, interior cage rotor 4 and outer 10 rotation direction of permanent magnet rotor is identical as rotating excitation field direction of rotation.
Essence of the invention be between traditional squirrel-cage influence generator stator and interior cage rotor increase by one with The outer permanent magnet rotor 10 of the concentric arrangement of interior cage rotor 4, the outer permanent magnet rotor 10 provide adjustable excitation, no The power factor and power density of generator operation only can be improved, and can satisfy regulator generator in a wider range and turn Speed, the outer permanent magnet rotor 10 are freely rotatable, and the synchronous rotary magnetic field of rotation speed and the generation of stator winding 5 is mutually stacked Add, reduce the electric current of the stator winding 5 of generator, there is outer air gap 3 between the outer permanent magnet rotor 10 and stator, it is described interior There is interior air gap 7 between cage rotor 4 and outer permanent magnet rotor 10, the formation of the outer air gap 3 and interior air gap 7 increases power generation The effective air gap area of machine, the torque density and air gap surface area of the generator are directly proportional, to improve turning for generator Square density is conducive to the energy-saving run of generator.
From fig. 4, it can be seen that birotor generator of the present invention and its control method, the key of control is to pass through electricity Pivot electric current and exciting current suitably coordinated control, meet the different specific performance indicators of variable speed drive system, such as improve short When overload capacity or wider range rotational speed regulation etc., due to the introducing of controllable electric exciting current variable, control system is increased Field current controller and exciting power converter are adjusted and control to exciting current, so that drive system control is cleverer It is living, to meet the control requirement of different variable speed drive systems.
Embodiment 2
According to the characteristic and operation characteristic of the birotor generator, its operation area is divided into low regime and high velocity two Point, as shown in Figure 3.
Increasing magnetic control is generallyd use in low regime, generallys use weak magnetic control in high velocity.The drive system operation control System can be controlled using following increasing magnetic controls or weak magnetic:
Increase magnetic control: magnetic being increased to provide big torque by outer permanent magnet rotor excitation winding 9, improves the short-time overload of generator Ability acquires torque real time information using torque master, when load torque is less than or equal to the nominal torque of generator, no It needs to increase magnetic control, that is to say, that the exciting current in outer permanent magnet rotor excitation winding 9 at this timeI f=0;As load torque TLGreatly In the nominal torque T of generatorNWhen, it is necessary to increase magnetic control, at this time the exciting current in outer permanent magnet rotor excitation winding 9I f The magnetic direction of generation is consistent with stator winding 5 and 8 magnetic direction of permanent magnet, achievees the purpose that increase magnetic.
Weak magnetic control: speed adjustable range is widened by outer 9 weak magnetic of permanent magnet rotor excitation winding, using speed detector Revolving speed real time information is acquired, when generator operates in high velocity, i.e., generator speed is greater than weak magnetic base speed, the generator Stator can reach capacity voltage value at this time can be by adjusting outer permanent magnetism if manufacturing technique requirent load continues to increase speed Exciting current in formula rotor field coil 9I fDirection, make its magnetic direction and 8 magnetic direction of stator winding 5 and permanent magnet On the contrary, to reduce the size of synthesis magnetic linkage, i.e. weak magnetic controls to achieve the purpose that export higher rotation speed.
Technical characteristic in the present invention without description can realize that details are not described herein by or using the prior art, when So, the above description is not a limitation of the present invention, and the present invention is also not limited to above embodiment, the common skill of this field The variations, modifications, additions or substitutions that art personnel are made within the essential scope of the present invention also should belong to protection model of the invention It encloses.

Claims (10)

1. a kind of birotor generator, including casing (1), the casing (1) is rotatably connected to shaft (19), the casing (1) Inside be fixedly connected with stator, the shaft (19) is fixedly connected with interior cage rotor (4), it is characterized in that: the stator with it is interior It is provided between cage rotor (4) outer permanent magnet rotor (10), the outer permanent magnet rotor (10) and shaft (19) rotation connect It connects, is provided with outer air gap (3) between the outer permanent magnet rotor (10) and stator, the interior cage rotor (4) and outer permanent magnetism Interior air gap (7) are provided between formula rotor (10).
2. birotor generator according to claim 1, it is characterized in that: the outer permanent magnet rotor (10) uses permanent magnet (8) and outer permanent magnet rotor excitation winding (9) common excitation.
3. birotor generator according to claim 2, it is characterized in that: the outer permanent magnet rotor (10) passes through outer permanent magnetism Formula rotor field spider (6) is rotatably connected with shaft (19), and the outer permanent magnet rotor (10) includes outer permanent magnet rotor iron core, leads Magnetic material, permanent magnet (8) and outer permanent magnet rotor excitation winding (9), the permeability magnetic material are fixedly mounted in outer permanent magnet rotor The surface of iron core, the permanent magnet (8) are fixedly mounted on permeability magnetic material, outer permanent magnet rotor excitation winding (9) installation In outer permanent magnet rotor iron core slot, the outer permanent magnet rotor excitation winding (9) is DC excitation winding, the outer magneto Rotor field coil (9) is connect by fairing (18) with exciter (13).
4. birotor generator according to claim 3, it is characterized in that: the exciter (13) includes exciter stator (15) and exciter rotor (16), the exciter stator (15) is fixed on exciter stator bracket (14), described to encourage Magnetomechanical rotor (16) is arranged on exciter rotor bracket (17), the exciter rotor bracket (17) and fairing (18) On outer permanent magnet rotor bracket (6), the outer permanent magnet rotor bracket (6) and outer permanent magnet rotor (10) are solid for fixed setting Fixed connection, the outer permanent magnet rotor bracket (6) are connect by outer permanent magnet rotor bearing (11) with shaft (19), the excitation Machine rotor (16) is connect by conducting wire with fairing (18), and the fairing (18) is encouraged by conducting wire and outer permanent magnet rotor Magnetic winding (9) connection.
5. according to claim 1 with birotor generator described in 4, it is characterized in that: the interior permanent magnet rotor (10) do not connect it is negative It carries, the interior cage rotor (4) drives load running by shaft (19), the number of poles of the outer permanent magnet rotor (10) and fixed The number of poles of son is consistent, and the magnetizing direction of the permanent magnet (8) is radial.
6. birotor generator according to claim 1, it is characterized in that: the stator includes stator core (2) and stator Winding (5), the stator core (2) are fixed on casing (1), and the stator winding (5) is installed in stator core (2) slot, The stator winding (5) is that three-phase symmetrical exchanges winding.
7. birotor generator according to claim 6, it is characterized in that: when stator winding (5) are passed through symmetrical three-phase alternating current When electric, under the action of three phase rotating field, interior cage rotor (4) and outer permanent magnet rotor (10) rotation direction and rotary magnetic Field direction of rotation is identical.
8. birotor generator according to claim 1, it is characterized in that: the interior cage rotor (4) and outer magneto Rotor (10) is concentric, and the interior cage rotor (4) includes interior cage rotor iron core and rotor cage item.
9. a kind of control method of birotor generator, it is characterized in that: special according to the characteristic of the birotor generator and operation Sign, is divided into low regime and high velocity for its operation area, generallys use increasing magnetic control in low regime, generally use in high velocity weak Magnetic control.
10. the control method of generator according to claim 9, it is characterized in that: passing through outer permanent magnet rotor excitation winding (9) increase magnetic to increase torque, improve the short-time overload capacity of generator, torque real time information is acquired using torque master, When load torque is less than or equal to the nominal torque of generator, do not need to increase magnetic control, that is to say, that permanent magnet rotor at this time Exciting current in excitation winding (9)i f=0;As load torque TLGreater than the nominal torque T of generatorNWhen, it is necessary to increase magnetic control It makes, at this time the exciting current in outer permanent magnet rotor excitation winding (9)i fThe magnetic direction and stator winding (5) and permanent magnetism of generation Body (8) magnetic direction is consistent, achievees the purpose that increase magnetic;
Speed adjustable range is widened by outer permanent magnet rotor excitation winding (9) weak magnetic, it is real using speed detector acquisition revolving speed When information, when generator operates in high velocity, i.e., generator speed is greater than weak magnetic base speed, and the stator of the generator can reach Extreme voltage values at this time can be by adjusting outer permanent magnet rotor excitation if manufacturing technique requirent load continues to increase speed Exciting current in winding (9)i fDirection, make its magnetic direction and stator winding (5), permanent magnet (8) magnetic direction on the contrary, To reduce the size of synthesis magnetic linkage.
CN201910892979.0A 2019-09-20 2019-09-20 Double-rotor generator and control method thereof Active CN110492710B (en)

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Publication number Priority date Publication date Assignee Title
CN113691093A (en) * 2021-07-30 2021-11-23 齐鲁工业大学 Outer rotor permanent magnet induction motor and working method

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