CN112829772A - Electromagnetic power device of fluid film suspension vehicle system - Google Patents
Electromagnetic power device of fluid film suspension vehicle system Download PDFInfo
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- CN112829772A CN112829772A CN201911153821.8A CN201911153821A CN112829772A CN 112829772 A CN112829772 A CN 112829772A CN 201911153821 A CN201911153821 A CN 201911153821A CN 112829772 A CN112829772 A CN 112829772A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/08—Sliding or levitation systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60V—AIR-CUSHION VEHICLES
- B60V3/00—Land vehicles, waterborne vessels, or aircraft, adapted or modified to travel on air cushions
- B60V3/02—Land vehicles, e.g. road vehicles
- B60V3/04—Land vehicles, e.g. road vehicles co-operating with rails or other guiding means, e.g. with air cushion between rail and vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/102—Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
Abstract
The invention relates to an electromagnetic power device of a fluid film suspension vehicle system, wherein a primary stage and a secondary stage of the electromagnetic power device are arranged on the chassis surface and the track surface of a wide fluid film suspension vehicle to increase the electromagnetic coupling area; the thinner pressure fluid film of the fluid film suspension vehicle is used as an electromagnetic coupling gap to reduce the size of the electromagnetic coupling gap. The electromagnetic power device of the fluid film suspension vehicle has the characteristics of large electromagnetic coupling area, small electromagnetic coupling gap and self-stability, can obviously improve the electromagnetic power, the electromagnetic conversion efficiency and the power factor of the fluid film suspension vehicle, generates a two-dimensional plane electromagnetic driving force, can effectively overcome the air resistance of the fluid film suspension vehicle during high-speed running, and ensures high-speed, high-efficiency and flexible running of the fluid film suspension vehicle.
Description
Technical Field
The invention relates to an electromagnetic power device of a fluid film suspension vehicle system, which can obviously increase the electromagnetic coupling area between a primary side and a secondary side to improve the electromagnetic power, obviously reduce the electromagnetic coupling gap between the primary side and the secondary side to improve the electromagnetic conversion efficiency and ensure the high-speed and high-efficiency running of a fluid film suspension vehicle.
Background
The dream of stably suspending a vehicle on a track and realizing high-speed and high-efficiency running is always pursued by human beings. Improving the driving force of the train power device and improving the operation efficiency is a key technical problem which needs to be solved for realizing the dream.
At present, the train traction power device mainly comprises two forms of adhesive traction and non-adhesive traction. The adhesion traction provides traction power by means of adhesion force between wheel rails, such as automobiles and trains, however, as the running speed increases, the air resistance of the trains is obviously increased, the adhesion force between the wheel rails cannot provide enough driving force to cause the wheel rails to slip, the air resistance during high-speed running is difficult to overcome, and higher running speed is realized.
In order to overcome the limitation of adhesive traction, a non-adhesive traction mode can be adopted, wherein the linear motor wheel rail traffic train is a non-adhesive traction train, the train traction is realized by means of electromagnetic acting force between a linear motor primary mounted on a bogie and a secondary mounted on a track, and the train body weight is borne by means of wheel rails and the steering is realized. The linear motor electromagnetic driving force gets rid of the limitation of adhesion force between wheel rails and can provide larger driving force than adhesion traction. However, there are still three key technical problems in the linear motor wheel-rail transit train system which are difficult to overcome: firstly, because the primary of the linear motor is arranged on a bogie, the secondary is arranged between two steel rails on a track, the structures and the sizes of the primary and the secondary are respectively limited by the distance between the bogie and the steel rails, the electromagnetic coupling area between the primary and the secondary is limited, and the electromagnetic driving force is in direct proportion to the electromagnetic coupling area, so the electromagnetic driving force of a train is limited, the train is difficult to overcome the air resistance at high speed, and the higher running speed is difficult to realize; secondly, in order to prevent the mechanical friction caused by the collision between the primary and the secondary in the running process, a large electromagnetic coupling gap (about 8-12 mm, which is about 10 times larger than the gap of the rotating motor) is designed between the primary and the secondary of the linear motor wheel-rail train, and the large electromagnetic coupling gap causes lower electromagnetic conversion efficiency, lower power factor and more serious side end effect (the efficiency and the power factor of the linear induction motor of the HSST train in japan are only 64%), and reducing the electromagnetic coupling gap and improving the efficiency of the power system are always important research points and technical difficulties in the field; thirdly, the bogie and the wheel set of the linear motor wheel rail traffic train do not have streamline structures, and the complex bogie and wheel set structure generates large air interference resistance during high-speed running, so that the running speed and the running efficiency of the linear motor wheel rail traffic train are further limited.
The fluid film suspension vehicle system comprises a fluid film suspension vehicle, a rail surface, a fluid film, a power device and the like, wherein the power device is installed on a train or a rail, the fluid film suspension vehicle is a high-speed train which depends on fluid viscosity and directly forms the fluid film between a chassis and the rail surface according to a hydrodynamic lubrication principle in the running process to enable the suspension running, but the air resistance is obviously increased when the high-speed train runs, the power device with large driving force and high running efficiency is designed, and the realization of the high-speed and high-efficiency suspension running is still the key technical problem which needs to be solved at present.
Disclosure of Invention
The invention aims to provide an electromagnetic power device of a fluid film suspension vehicle, which has the advantages of large driving force, high efficiency, self-stability of electromagnetic coupling gap size and capability of realizing two-dimensional planar motion.
In order to achieve the above object, an electromagnetic power device for a fluid film levitation vehicle according to the present invention is a fluid film levitation vehicle, comprising: the primary and the secondary (also called as a stator and a rotor respectively) are arranged on the bottom disc surface and the track surface which are wide and big in width of the fluid film suspension vehicle, so that the electromagnetic coupling area between the primary and the secondary can be remarkably increased, and the electromagnetic power is improved; the electromagnetic coupling gap is composed of a thinner fluid film, so that the electromagnetic coupling gap can be obviously reduced, and the electromagnetic conversion efficiency and the power factor are increased; the characteristics of large electromagnetic coupling area and small electromagnetic coupling gap ensure high-speed and high-efficiency operation of the fluid film suspension vehicle. The electromagnetic power device of the suspension train is characterized in that: the primary winding on the chassis of the train is electrified with alternating current to generate a traveling wave magnetic field, so that the train is driven; the primary, secondary and electromagnetic coupling gaps together form a short primary motor form, which can include a short primary induction motor, a short primary switched reluctance motor, a short primary synchronous motor, a short primary double-fed motor and the like. The electromagnetic power device of the suspension train is characterized in that: the primary winding on the track surface is electrified with alternating current to generate a traveling wave magnetic field, so that the guide rail driving is realized; the primary, secondary and electromagnetic coupling gaps form a long primary motor form, and the long primary motor form can comprise a long primary induction motor, a long primary switched reluctance motor, a long primary synchronous motor, a long primary double-fed motor and the like. The electromagnetic power device of the suspension train is characterized in that: the primary winding and the secondary winding are both provided with windings, and the functions of starting acceleration, regenerative braking, high-speed running, wireless power transmission and the like of the fluid film suspension vehicle can be realized by controlling the current in the primary winding and the secondary winding. The electromagnetic power device of the suspension train is characterized in that: the primary or the secondary comprises a winding, and the winding is composed of two groups of conducting coils which are vertically and orthogonally arranged in space; by adjusting the magnitude and frequency of exciting currents in two groups of conducting coils which are orthogonally arranged, electromagnetic driving forces in the longitudinal direction, the transverse direction and the rotating direction can be generated, and a two-dimensional electromagnetic driving force in any direction on a track plane can be generated. The electromagnetic power device of the fluid film suspension vehicle is characterized in that: the track surface is a two-dimensional wide plane, and the track surface does not comprise a guide rail structure, so that the fluid film suspension vehicle has two-dimensional motion freedom on the track surface, and the fluid film suspension vehicle is changed into two-dimensional plane motion in any direction from one-dimensional linear motion of a conventional train under the action of a two-dimensional electromagnetic driving force. The electromagnetic power device of the fluid film suspension vehicle is characterized in that: the fluid film state comprises a gas state, a liquid state or a gas-liquid mixture state, and the viscosity and the thickness of the fluid film can be adjusted by selecting and adjusting the fluid state in the fluid film, so that the adjustment of the electromagnetic coupling gap, the electromagnetic conversion efficiency and the power factor of the fluid film suspension vehicle is realized.
At present, the highest economic speed of a high-speed vehicle running on the ground is not more than 400 kilometers per hour, the electromagnetic power device of the fluid film suspension vehicle can obviously improve the electromagnetic driving force and the electromagnetic conversion efficiency, and technical feasibility is provided for realizing the ground running speed of more than 400 kilometers per hour.
The invention has the following beneficial effects:
1. the electromagnetic power is increased: the electromagnetic power device of the fluid film suspension vehicle utilizes the wide chassis and the track surface to install the primary and the secondary, eliminates the size limitation of the traditional wheel-track train bogie and the steel rail structure on the primary and the secondary, obviously increases the electromagnetic coupling area, improves the electromagnetic power, and solves the key technical problems of large air resistance and insufficient driving force when the fluid film suspension vehicle runs at high speed.
2. The electromagnetic coupling gap is reduced, the efficiency is improved, and the size of the electromagnetic coupling gap has self-stability: according to the hydrodynamic effect, the average pressure of a fluid film is inversely proportional to the square of the thickness of the fluid film, so that the thickness of the pressure fluid film, namely the size of an electromagnetic coupling gap, has better self stability and robustness, and the key technical problems that the electromagnetic coupling gap is unstable and collision and mechanical friction are easily generated between a primary side and a secondary side in a conventional train are solved; the electromagnetic power device of the fluid film suspension vehicle utilizes the self-stable and thin pressure fluid film as the electromagnetic coupling gap, obviously reduces the size of the electromagnetic coupling gap between the primary and the secondary, improves the electromagnetic conversion efficiency, and solves the key technical problems of large electromagnetic coupling gap, low efficiency and low power factor of the conventional train motor.
3. The adjustment of the size of the electromagnetic coupling air gap is realized: the electromagnetic power device of the fluid film suspension vehicle realizes the adjustment of fluid viscosity and thickness through the selection and adjustment of the gaseous state, the liquid state or the gas-liquid mixed vaporization state of the fluid film, thereby realizing the key technical problems of the adjustment of electromagnetic coupling gap, electromagnetic conversion efficiency and power factor.
4. The two-dimensional plane driving force and the two-dimensional plane motion are realized, and a turnout structure is omitted: winding coils in the primary or secondary of the electromagnetic power device of the fluid film suspension vehicle are orthogonally arranged in space, and two-dimensional electromagnetic driving force in any direction on a horizontal plane can be synthesized by controlling the magnitude and direction of current in the winding coils, so that two-dimensional driving and guiding of a train are realized; the electromagnetic power device of the fluid film suspension vehicle enables the vehicle body to change from one-dimensional linear motion of a conventional train into two-dimensional plane motion, increases the expansion freedom degree of the track, has the expansibility of the moving direction, and omits a complex turnout structure of the conventional train at the intersection of the track.
5. The train bogie device is omitted: the adoption of the electromagnetic power device of the fluid film suspension vehicle omits a bogie device commonly existing in a train, so that the overall streamline design is easier to realize, and the key technical problems of large air interference resistance and large differential pressure resistance when the bogie with a complex structure runs at high speed are solved; by eliminating a complex and heavy bogie and a wheel device thereof, the structure of the vehicle body is simplified, the weight of the vehicle body is reduced, the cost of the vehicle body is reduced, the vertical size of the vehicle body is also reduced, the required section of a construction tunnel is reduced, the amount of earth for underground construction is reduced, and the construction cost of a track is reduced; the electromagnetic power device of the fluid film suspension vehicle has the steering function although a bogie device is omitted, has the beneficial effects of more flexible steering and smaller turning radius, is more beneficial to bypassing buildings and barriers on the ground and underground, and brings great benefit to line selection.
6. The longitudinal edge effect promotes the formation of a hydrodynamic pressure effect: the electromagnetic power device of the fluid film suspension vehicle has the advantages that the attractive force of a train in the running direction is unevenly distributed due to the existence of the dynamic longitudinal edge effect when the fluid film suspension vehicle runs at a high speed, so that the phenomena of uneven stress of the front end tilting and the rear end pressing are caused, and the uneven stress phenomenon can be increased along with the increase of the speed. The fluid film suspension vehicle just utilizes the characteristics of unbalanced stressed longitudinal edge ends with the warped front end and the pressed rear end to promote the formation of a wedge-shaped gap of a fluid film and a fluid dynamic pressure effect.
7. The small electromagnetic coupling gap promotes the diversification of the planar motor form: the electromagnetic power device of the fluid film suspension vehicle takes a thinner pressure fluid film as an electromagnetic coupling gap, so that the size of the electromagnetic coupling gap between a primary stage and a secondary stage can be equivalent to that of a rotating motor, even smaller than that of the electromagnetic coupling gap of the rotating motor, and therefore, the planar motor forms developed by different types of rotating motors can be applied to the fluid film suspension vehicle system and better electromagnetic performance is ensured. For example, when a switched reluctance motor is used, the smaller electromagnetic coupling gap makes the loop reluctance change more, which can significantly improve the efficiency and power density of the switched reluctance motor, and the smaller electromagnetic coupling gap can also improve the electromagnetic performance of the induction motor and the synchronous motor. Thus, the smaller electromagnetic coupling gap in the electromagnetic power unit of the present invention facilitates the diversification of the form of the planar motor.
8. The large electromagnetic coupling area promotes the function diversification of the device: the electromagnetic power device of the fluid film suspension vehicle has larger electromagnetic coupling area between the primary and the secondary, can realize the quick start of the fluid film suspension vehicle by controlling the current magnitude and the frequency in the primary and the secondary winding coils, and obtains higher speed in a short time, so that the fluid film suspension vehicle quickly depends on the hydrodynamic lubrication principle to form a pressure fluid film to perform suspension running; when the train is powered by the storage battery, the large electromagnetic coupling area ensures that high-power wireless power transmission charges the storage battery; the large electromagnetic coupling area also ensures higher efficiency during regenerative braking, and the feedback of electric energy can be realized; in conclusion, the primary and secondary with large electromagnetic coupling areas can realize the functions of starting acceleration, regenerative braking, high-speed running, wireless power transmission and the like of the fluid film levitation vehicle.
9. The noise is reduced: the electromagnetic power device of the fluid film suspension vehicle is free of any mechanical moving part, mechanical vibration and mechanical noise in the walking process are eliminated, and the influence on the environment is reduced; the invention omits a bogie and wheel structure, and solves the key technical problem of pneumatic noise caused by the bogie and the wheels in the conventional train.
10. The electromagnetic interference is reduced: the electromagnetic power device of the fluid film suspension vehicle takes a thin fluid film as an electromagnetic coupling gap, the magnetic field between the primary and the secondary is well closed, the magnetic field is less diffused to the outside, and the key technical problems of large electromagnetic pollution and serious electromagnetic interference of a magnetic suspension train are solved.
11. The edge effect is reduced: the electromagnetic power device of the fluid film suspension vehicle has a larger electromagnetic coupling area and a smaller electromagnetic coupling air gap, and can obviously weaken the side-end effect of the electromagnetic power device.
12. The complicated mechanical design problem caused by vertical electromagnetic attraction is avoided: because the primary and the secondary have stronger vertical electromagnetic force, the traditional train adopts modes such as block, roll extrusion, anchor joint to consolidate primary and secondary, prevents that primary and secondary from being destroyed by vertical electromagnetic force. The electromagnetic power device of the fluid film suspension vehicle takes the pressure fluid film as a supporting medium, and the pressure of the fluid film enables the primary and secondary stress to be balanced, thereby solving the key technical problem of complex mechanical reinforcement design caused by electromagnetic attraction.
13. The heat dissipation effect is good, and the heat is effectively utilized: the primary and secondary of the fluid film suspension vehicle electromagnetic power device have larger areas, the heat dissipation effect is good, a special heat dissipation device is not required to be added, and natural cooling can be realized; moreover, after the heat generated by the primary and the secondary is transferred to the fluid film, the viscosity of the fluid film can be reduced, the viscous resistance can be reduced, the pressure of the fluid film can be increased, and the load-carrying capacity can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a fluid film levitation vehicle and an electromagnetic power device thereof according to the present invention;
FIG. 2 is a three-dimensional schematic view of a first embodiment of the electromagnetic power device of the fluid film levitation vehicle of the present invention;
FIG. 3 is a schematic side view of a first embodiment of the electromagnetic power device of the fluid film levitation vehicle of the present invention;
FIG. 4 is a schematic top view of a primary winding coil of a first embodiment of a fluid film levitation vehicle electromagnetic power device of the present invention;
FIG. 5 is a top view of a winding coil with a primary segmented in a first embodiment of the electromagnetic power device of the fluid film levitation vehicle of the present invention;
FIG. 6 is a side view of a short primary induction motor with a grid-type conductor structure at the secondary stage of a second embodiment of the electromagnetic power device of the fluid film levitation vehicle of the present invention;
FIG. 7 is a side view of a short primary switched reluctance motor of a second embodiment of a fluid film levitation vehicle electromagnetic power apparatus of the present invention;
FIG. 8 is a side view of a short primary synchronous machine employing DC field windings for a second embodiment of a fluid film levitation vehicle electromagnetic power device of the present invention;
FIG. 9 is a side view of a short primary synchronous machine employing permanent magnets of a second embodiment of the fluid film levitation vehicle electromagnetic power device of the present invention;
FIG. 10 is a side view of a short-primary double-fed electric machine of a second embodiment of the electromagnetic power unit of the fluid film levitation vehicle of the present invention;
Detailed Description
The first embodiment is as follows:
the present embodiment will be described below with reference to fig. 1 to 5, and an embodiment of the electromagnetic power device for a fluid film levitation vehicle according to the present invention includes: the magnetic field generator comprises a car 1, a primary 2, a secondary 3, an electromagnetic coupling gap (fluid film) 4, a primary magnetic conduction layer 5, a primary longitudinal winding 6, a primary transverse winding 7, a primary surface layer 8, a traveling magnetic field 9 and the like. The invention has the basic idea that the primary 2 and the secondary 3 are arranged on the large chassis surface and the large track surface of the fluid film suspension vehicle to increase the electromagnetic coupling area, and the thinner pressure fluid film 4 is used as the electromagnetic coupling gap to reduce the size of the electromagnetic coupling gap.
As shown in fig. 1, the fluid film suspension vehicle realizes suspension running by forming a thin pressure fluid film between the chassis and the rail surface by means of the dynamic pressure effect of viscous fluid during running, and mechanical friction resistance between the train and the ground is eliminated. The invention utilizes the characteristics of large chassis area and thin fluid film of the fluid film suspension vehicle to install a primary 2 and a secondary 3 on the chassis and the track surface of the train, and uses the thin pressure fluid film as an electromagnetic coupling gap 4. The primary 2, secondary 3 and electromagnetic coupling gap 4 constitute an electromagnetic power device in the form of an induction motor of the first embodiment of the present invention, which has the typical characteristics of a large electromagnetic coupling area and a small electromagnetic coupling gap.
Fig. 2 is a three-dimensional schematic diagram of an electromagnetic power device according to a first embodiment of the present invention, in which a primary 2 is mainly composed of a primary magnetic conduction layer 5, a primary longitudinal winding 6, a primary transverse winding 7, and a primary surface layer 8, a secondary 3 is mainly composed of a solid conductive plate, an electromagnetic coupling gap 4 is mainly composed of a relatively thin pressure fluid film, the fluid film may be in the form of gas, liquid, or a mixture of gas and liquid, and the surfaces of the primary surface layer 8 and the secondary 3 have relatively good flatness and relatively low surface roughness, so that a train forms a relatively thin fluid film according to the hydrodynamic lubrication principle when running at high speed.
As shown in fig. 3, when three-phase symmetric excitation currents are applied to the three-phase windings of the transverse winding 7, a traveling-wave magnetic field 9 is formed, the traveling-wave magnetic field 9 cuts the secondary winding 3 to generate an induced electromotive force and an induced current, and the primary and secondary magnetic fields interact with each other to generate a longitudinal electromagnetic driving force. Similarly, a three-phase excitation current is conducted in the longitudinal phase winding 6 to generate a transverse electromagnetic driving force. By controlling the current magnitude and direction in the transverse winding 7 and the longitudinal phase winding 6, the two-dimensional electromagnetic driving force in any direction on the horizontal plane can be synthesized, the two-dimensional traction and guidance of the train are realized, and the one-dimensional linear motion of the conventional train is changed into the two-dimensional plane motion of the fluid film suspension train. The transverse winding 7 is spatially orthogonal to the longitudinal phase winding 6, as shown in the top view of fig. 4.
As shown in fig. 5, if the primary on the chassis surface is partitioned (four partitions are included in fig. 5), each partition is provided with orthogonal windings and independently controls the magnitude of the exciting current in the transverse windings and the longitudinal windings, so that the electromagnetic rotating force in the rotating direction of the train can be generated.
The fluid film can be composed of a gaseous state, a liquid state or a gas-liquid mixed vaporization state, a heating device can be installed on the train chassis to control the temperature, the pressure and the fluid state of the fluid film, and the adjustment of fluid viscosity and the fluid film thickness can be realized through the selection of the fluid state, so that the adjustment of electromagnetic coupling gap size, electromagnetic conversion efficiency and power factor is realized.
The second embodiment is as follows:
the electromagnetic power device has a small electromagnetic coupling gap and a large electromagnetic coupling area, and promotes the diversification of the motor forms. The following describes the embodiments of the present invention with reference to fig. 6 to 10.
When elementary 2 installs on train chassis face, when secondary 3 installs on the track face, constituted short primary motor form, mainly included: short primary induction motors, short primary switched reluctance motors, short primary synchronous motors, short primary double-fed motors and the like.
The secondary 3 of the short primary induction machine may be of solid conductor construction, as shown in figure 3 of the first embodiment, which is the lowest cost to build; the secondary 3 of the short primary induction machine can also be a grid type conducting bar structure 10 as shown in fig. 6, which is an extension of the squirrel cage asynchronous rotating machine, and the efficiency and power factor of the motor form of the grid type conducting bar structure are higher than those of the motor form of the solid conductor structure. A magnetically permeable layer 12 may be included in the secondary 3 to allow better closure of the magnetic field. The secondary 3 also includes a high-flatness, low-surface roughness secondary surface layer 11 to help the train form a thin pressurized fluid film according to the hydrodynamic lubrication principle.
The short primary switched reluctance motor is shown in a side view in fig. 7, and the secondary can be assembled by discontinuous steel plates, so that the cost is lower. The small electromagnetic coupling gap in the invention ensures that the loop reluctance change is large, thereby ensuring the applicability of the switched reluctance motor.
The short primary synchronous machine is shown in fig. 8 in a side view, and the secondary side of the short primary synchronous machine can adopt a direct current excitation winding 13; permanent magnets 14 may also be used, as shown in fig. 9. The short primary synchronous motor form can further improve the system efficiency, but the secondary construction cost is obviously increased.
The side view of the short-primary double-fed motor is shown in fig. 10, the primary 2 and the secondary 3 are both composed of excitation windings, the winding 7 of the primary 2 and the winding 12 of the secondary 3 are both electrified with alternating current to generate a travelling magnetic field 9, and the short-primary double-fed motor can realize the functions of quick start and regenerative braking. When the train is powered by the storage battery, high-power wireless power transmission can be realized by utilizing a larger electromagnetic coupling area to charge the storage battery.
When secondary 3 installs on train chassis face, elementary 2 when installing on the track face, constituted long elementary motor form, wherein include: compared with the short primary motor, the modes of the long primary induction motor, the long primary switched reluctance motor, the long primary synchronous motor and the long primary double-fed motor are primary and secondary position interchanges, have duality and are not described again in the embodiment.
Claims (7)
1. An electromagnetic power device of a fluid film suspension vehicle system is characterized in that: the method comprises the following steps: the electromagnetic coupling device comprises a primary stage, a secondary stage and an electromagnetic coupling gap, wherein the primary stage and the secondary stage are arranged on a chassis surface and a rail surface of the fluid film suspension vehicle system, the primary stage and the secondary stage are coupled through electromagnetic coupling, the electromagnetic coupling gap is arranged between the primary stage and the secondary stage, and the electromagnetic coupling gap is filled with a fluid film.
2. The electromagnetic power plant of a fluid film levitation vehicle system as recited in claim 1, wherein: the primary winding on the chassis surface is electrified with alternating current to generate a traveling wave magnetic field, so that a train driving mode is realized; short primary motor forms are composed of primary, secondary and electromagnetic coupling gaps filled with fluid films, including short primary induction motors, short primary switched reluctance motors, short primary synchronous motors, short primary double-fed motors, and the like.
3. The electromagnetic power plant of a fluid film levitation vehicle system as recited in claim 1, wherein: the secondary is arranged on the chassis surface of the fluid film suspension vehicle, the primary is arranged on the track surface, and alternating current is conducted in a primary winding on the track surface to generate a traveling wave magnetic field so as to realize a guide rail driving mode; the electromagnetic coupling gap filled by the primary, secondary and fluid film is composed into long primary motor form, which includes long primary induction motor, long primary switch reluctance motor, long primary synchronous motor, long primary double-feed motor, etc.
4. The electromagnetic power plant of a fluid film levitation vehicle system as recited in claim 1, wherein: the primary winding and the secondary winding are both provided with windings, and the functions of starting acceleration, regenerative braking, high-speed running, wireless power transmission and the like of the fluid film suspension vehicle can be realized by controlling the current in the primary winding and the secondary winding.
5. The electromagnetic power plant of a fluid film levitation vehicle system as recited in claim 1, wherein: the primary or the secondary can contain windings, and the windings are formed by two groups of conducting coils which are vertically arranged in space; by adjusting the current magnitude and frequency in the two groups of conductive coils, the electromagnetic driving force in the longitudinal direction, the transverse direction and the rotating direction can be generated, and the two-dimensional electromagnetic driving force in any direction on the track plane can be generated.
6. The electromagnetic power plant of a fluid film levitation vehicle system as recited in claim 1, wherein: the track surface is a two-dimensional wide plane and does not comprise a guide rail structure, so that the fluid film suspension vehicle has two-dimensional motion freedom degrees in the transverse direction and the longitudinal direction on the track surface; the fluid film suspension vehicle can change one-dimensional linear motion of a conventional train into two-dimensional plane motion in any direction under the action of a two-dimensional electromagnetic driving force.
7. The electromagnetic power plant of a fluid film levitation vehicle system as recited in any one of claims 1-6, wherein: the fluid film state comprises a gas state, a liquid state or a gas-liquid mixture state; the adjustment of the viscosity and the thickness of the fluid film can be realized by selecting and adjusting the fluid state in the fluid film, and further the adjustment of the electromagnetic coupling gap, the electromagnetic conversion efficiency and the power factor of the fluid film suspension vehicle is realized.
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| CN104218770A (en) * | 2014-09-28 | 2014-12-17 | 浙江理工大学 | Multi-phase winding-nested permanent-magnet synchronous planar motor |
| CN204271955U (en) * | 2015-01-06 | 2015-04-15 | 杭州汇萃智能科技有限公司 | A kind of coil layer stacked moving-coil planar motor |
| CN106143507A (en) * | 2015-03-10 | 2016-11-23 | 崔彬 | Fluid film levitation vehicle |
| CN105680667A (en) * | 2016-03-04 | 2016-06-15 | 西南交通大学 | High-temperature superconducting linear induction motor driving apparatus used for linear traction |
| CN108462360A (en) * | 2018-04-13 | 2018-08-28 | 上海交通大学 | Linear induction synchronous motor |
| CN109347286A (en) * | 2018-12-05 | 2019-02-15 | 王政玉 | A kind of air gap monopole excitation magnetic potential synchronous motor |
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