CN114123706A - Linear motor transportation system - Google Patents
Linear motor transportation system Download PDFInfo
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- CN114123706A CN114123706A CN202111504728.4A CN202111504728A CN114123706A CN 114123706 A CN114123706 A CN 114123706A CN 202111504728 A CN202111504728 A CN 202111504728A CN 114123706 A CN114123706 A CN 114123706A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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Abstract
A linear motor transport system comprising: a stator including a plurality of stator units, the stator units having primary windings; a mover; and a driving controller provided on the mover and moving integrally with the mover. The linear motor system has the advantages of simple structure, safety, reliability, economy, practicability, high efficiency, energy conservation, and a series of advantages of moving coil type and moving magnet type structural schemes, and solves the technical bottlenecks and engineering application problems of a primary segmented linear motor driving system, particularly power supply switching in the fields of lifting transportation and track (magnetic levitation) traffic, complex control system, low reliability, high cost and the like.
Description
Technical Field
The invention belongs to the technical field of transportation, and particularly relates to a linear motor transportation system.
Background
The linear motor driving system is widely applied to various industries, such as linear motor subways, linear motor automatic assembly lines, direct-drive vertical lifting systems, magnetic levitation transportation and other application fields. Linear motors, especially vertical lift permanent magnet linear motors, generally adopt a moving magnet (moving secondary) structure with a long primary and a short secondary, or a moving coil structure with a long secondary and a short primary, and which structure and how to reliably supply power and control become one of the key technologies of linear motor driving systems.
For a linear motor, if a moving coil type structure is selected, power supply is relatively simple, direct power supply or contact power supply or non-contact power supply can be realized by cables, a frequency converter (an inverter) is positioned on a rotor or a car, and control is simple. However, the long secondary permanent magnet is difficult to protect, and the primary coil serving as the mover is electrified for a long time, so that the primary coil and the iron core are easy to generate heat, and the volume and the self weight of the primary coil and the iron core are large. And the frequency converter (inverter) is positioned on the rotor, so that the self weight of the moving part is further increased, the vertical lifting effective load is smaller, and the lifting force utilization rate of the linear motor is not high.
If select the moving-magnet formula structure, primary coil and drive controller arrange along the track, the advantage is that the short-time circular telegram of primary coil can reduce linear electric motor volume and dead weight, and secondary permanent magnetic volume and dead weight as the active cell are less, and the vertical lift payload is big, and linear electric motor lifting force high-usage, secondary permanent magnetism protection are simple, easy maintenance, the active cell power supply is simple etc.. However, the stator coil needs to be supplied with power in sections, and the number of the unit motors is large, the number of the power supply switching devices is large, and the sectional power supply switching control system can cause the problems of sharply increased construction cost, hard bearing of use and maintenance cost, reduced system reliability and the like.
Disclosure of Invention
The embodiment of the invention provides a linear motor structure, and aims to solve one of the problems in the prior art, namely the defects of complex control system, low reliability and high cost caused by the fact that a great number of driving controllers for switching power supply control of stator sections are required to be arranged along the way in the conventional linear motor system.
In one embodiment of the present invention, a linear motor structure includes a stator, a mover, a driving controller, and a power supply system. The stator includes a plurality of stator units having primary windings; the driving controller is provided on the mover and moves integrally with the mover. And the power supply system supplies power to the stator through a driving controller arranged on the rotor. The power supply system may be a wired power supply system with contact or a wireless power supply system without contact.
The linear motor system disclosed by the embodiment of the invention has the advantages of simple structure, safety, reliability, economy, practicability, high efficiency, energy conservation, and a series of advantages of moving coil type and moving magnet type structural schemes, and solves the technical bottlenecks and engineering application problems of a primary segmented linear motor driving system, especially power supply switching in the fields of lifting transportation and track (magnetic levitation) transportation, complex control system, lower reliability, high cost and the like.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
fig. 1 is a schematic diagram of a linear motor transmission system according to one embodiment of the present invention.
Fig. 2 is a schematic diagram of a linear motor transmission system according to one embodiment of the present invention.
1-a unit motor stator module,
2-a rotor, a stator and a rotor,
3-intermittent sliding contact rail at load end,
4-the load side brush,
5-a second insulating member,
6-the power supply end sliding contact rail,
7-the power end electric brush,
8-the driving controller is used for driving the motor,
81-the power input of the drive controller, 82-the load output of the drive controller, 9-the first insulator.
Detailed Description
At present, for a segmented power supply system to be arranged on a stator module, a moving-magnet permanent magnet linear motor has an electronic switching mode of power devices or power switches such as an IGBT (insulated gate bipolar transistor), a thyristor and a solid-state relay, and an electromagnetic and mechanical switching mode such as a contactor. The number of the change-over switches and the frequency converters (inverters) is large, a large number of position detection sensors, special protection circuits, upper computers and other processing devices are required to be arranged along a track, intermediate links are large, and the defects that an electronic switch, an electromagnetic switch coil and a pre-energized primary coil which is not coupled with a rotor are large in idle current (multiple times of normal motor current) loss, complex in circuit, high in cost, faulty and faulty sensor or contactor, unreliable in switching and the like exist. The synchronous control problem that a plurality of frequency converters (inverters) simultaneously control one car (car body) needs to be solved, so that the reliability of the whole system is greatly determined whether a segmented power supply system is mature and reliable, and the engineering implementation difficulty is high.
For example, chinese patent application CN201510748173.6 discloses a "linear motor sliding contact type segmented power supply switching device", which proposes a segmented switching scheme for primary windings of unit motors, but the power supply (i.e. the output end or load end power supply of the driving controller) is located in the stator track, in order to accurately control different unit motor sets coupled with a plurality of cars (movers) respectively and not to waste the power consumed by the pre-energizing coil (the power consumed by the pre-energizing coil not coupled with the movers is several times larger than the normal motor current), theoretically, it is required to provide a driving controller at intervals of not long length (generally, the length of the movers is equivalent, the interval is shorter, the controllable interval between two adjacent cars is smaller, but the cost is higher, the length of a unit motor is theoretically the best, but the number and cost of the driving controllers are also the highest), for this reason, a large number of driving controllers and position detection sensors need to be arranged along the stator track or the foundation, for a long-distance linear motor multi-car lifting and transporting system, the number of driving controllers and sensors on a track and cables are large, the system is probably not economical, especially brings operation control difficulty and operation disturbance, the problem of synchronous control of stator windings of multiple sections of different units of motors coupled by two or more driving controllers which simultaneously and accurately control one car or one rotor (when the linear motor multi-car lifting and transporting system runs to a section of two or more driving controllers) is solved, the control system is complex, and the overall system cost is high.
According to one or more embodiments, the linear motor transportation system comprises a stator, one or more rotors, one or more driving controllers and a power supply system, wherein the power supply system adopts wireless transmission power supply and comprises a first wireless transmission power supply system and a second wireless transmission power supply system. Wherein the content of the first and second substances,
the stator includes a plurality of sequentially arranged stator units having primary windings. The driving controller is arranged on the rotor and used for controlling the motion of the rotor. And a first wireless transmission power supply system for supplying power to the whole linear motor transportation system, wherein the first wireless transmission power supply system is arranged along the transportation track formed by the stator units. The drive controller receives power input provided by the first wireless transmission power supply system through wireless transmission. And the second wireless transmission power supply system is arranged on the rotor, and along with the continuous movement of the rotor, the primary winding of the stator unit receives the electric energy input provided by the second wireless transmission power supply system in a wireless transmission mode.
The first or second wireless transmission power supply system may be an inductive wireless transmission power supply system, such as a common electromagnetic inductive or electric field inductive wireless transmission power supply system, an electromagnetic wave type, resonance type, or other wireless transmission power supply systems, or a reactive type or other novel wireless transmission power supply systems. The driving controller can control loads such as the rotor and the stator, and also can control loads such as illumination, an air conditioner and the like.
According to one or more embodiments, a linear motor transport system includes a stator, one or more movers, and one or more drive controllers. The stator in turn comprises a plurality of sequentially arranged stator units having primary windings. The driving controller is arranged on the rotor and used for controlling the motion of the rotor. The linear motor transportation system adopts a contact power supply mode, a power supply mechanism of the system comprises two parts, wherein the first part comprises a first sliding contact rail and a first electric brush, and the second part comprises a second sliding contact rail and a second electric brush.
The first sliding contact rail of the first part is a conductor and is electrically connected with an input power supply bus of the linear motor transportation system. The first brush is provided on the mover or an attachment connected to the mover. The first brush is electrically connected to a power input of the drive controller. Meanwhile, the first electric brush is matched with the first sliding contact rail, and along with the movement of the mover, the first electric brush moves on the first sliding contact rail in a contact mode.
The second sliding contact rail of the second part is an electric conductor and comprises a plurality of second sliding contact rail units which are sequentially arranged along the conveying track formed by the stator units, the arrangement of the second sliding contact rail units corresponds to the arrangement of the stator units, and each second sliding contact rail unit is electrically connected with the primary winding of the corresponding stator unit.
The second part comprises one or more second electric brushes, the electric brushes are arranged on the mover or an attachment connected with the mover, meanwhile, the second electric brushes are arranged in a matching way with the second sliding contact rails, and the second electric brushes are arranged on the second sliding contact rail units along with the movement of the mover and continuously contact and move among the plurality of second sliding contact rail units. And the second electric brush is electrically connected with the driving output end of the driving controller.
An insulator or an insulating gap is provided between the second sliding contact rail units, so that the second brush moves from one second sliding contact rail unit to the other second sliding contact rail unit through the insulating gap or in contact with the insulator.
The matching arrangement between the sliding contact rail and the electric brush comprises a rolling and sliding matching arrangement mode and a rolling and sliding matching arrangement mode. That is, the first brush surface slides or rolls or both slides and rolls on the first sliding rail as the mover moves. The second brush surface slides or rolls or both slides and rolls with the second sliding contact rail surface, and the second brush continuously slides or rolls or both slides and rolls on the second sliding contact rail unit and among the plurality of second sliding contact rail units along with the movement of the mover.
Preferably, the linear motor transportation system comprises a transportation track, and the stator is arranged on the transportation track. A guide positioning device is arranged between a rotor and a stator, generally a guide positioning rail and a guide positioning wheel (or a slide block) group, according to different application scenes, a brake safety device can be arranged between the stator (or a transportation rail) and the rotor or an attachment connected with the rotor, generally a brake rail and a brake (safety tongs), common brake rails comprise a T-shaped rail, a rack and the like, common caliper disc brakes and caliper disc type safety tongs, gear type brakes, gear type safety tongs and the like, and the guide positioning device and the guide positioning wheel (or the slide block) group can be independently arranged or can be selectively arranged according to requirements. In general, the stator, the guide positioning rail, and the brake rail are disposed on the transport track or are themselves part of the transport track, and accordingly, the guide positioning wheel (slider) set and the brake (safety gear) are respectively disposed on the mover or an attachment connected to the mover in cooperation with the guide positioning rail and the brake rail.
Preferably, the attachment on the mover is a car for carrying a person or a container for carrying a thing.
Preferably, in this embodiment, the linear motor transportation system may be powered by dc power or ac power.
In accordance with one or more embodiments, a linear motor transport system, the system comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover, for controlling a movement of the mover;
a first wireless transmission power supply system for supplying power to the linear motor transportation system, the first wireless transmission power supply system being disposed along a transportation track or a surrounding space formed by the stator units, the drive controller receiving power input provided by the first wireless transmission power supply system through wireless transmission;
the second sliding contact rail is a conductor and comprises a plurality of second sliding contact rail units which are sequentially arranged, the arrangement of the second sliding contact rail units corresponds to the arrangement of the stator units, and
each second sliding contact rail unit is electrically connected with the primary winding of the corresponding stator unit;
at least one second brush, which is disposed on the mover or an attachment of the mover, and at the same time,
the second brush is matched with the second sliding contact rail, along with the movement of the mover, the second brush moves on the second sliding contact rail unit in a contact manner and/or moves among a plurality of second sliding contact rail units in a continuous contact manner, and in addition,
the second brush is electrically connected with a drive output end of the drive controller.
In accordance with one or more embodiments, a linear motor transport system, the system comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
a first wireless transmission power supply system for supplying power to the linear motor transportation system, the first wireless transmission power supply system being disposed along a transportation track or a surrounding space formed by the stator units, the driving controller receiving power input provided by the first wireless transmission power supply system through wireless transmission,
and the second wireless transmission power supply system is arranged on the rotor or an attachment of the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
In accordance with one or more embodiments, a linear motor transport system, the system comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
a first sliding contact rail which is a conductor and is electrically connected with a power supply bus of the linear motor transportation system, a first electric brush which is arranged on the mover or an attachment connected with the mover, and at the same time,
the first electric brush is matched with the first sliding contact rail, the first electric brush moves on the first sliding contact rail in a contact manner along with the movement of the mover, and in addition,
the first electric brush is electrically connected with a power supply input end of the driving controller;
and the second wireless transmission power supply system is arranged on the rotor or an attachment connected with the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
In accordance with one or more embodiments, a linear motor transport system, the system comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
the input end of the driving controller is electrically connected with a power supply bus of the linear motor transportation system through a traveling cable;
and the second wireless transmission power supply system is arranged on the rotor or an attachment connected with the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
According to one or more embodiments, a linear motor transportation system includes a stator, one or more movers, and one or more drive controllers. The stator includes a plurality of sequentially arranged stator units having primary windings. The driving controller is arranged on the rotor or an attachment of the rotor and used for controlling the motion of the rotor, and the input end of the driving controller is electrically connected with a power supply bus of the linear motor transportation system through a traveling cable. The system further comprises:
the second sliding contact rail is an electric conductor and comprises a plurality of second sliding contact rail units which are sequentially arranged along the conveying track formed by the stator units, the arrangement of the second sliding contact rail units corresponds to the arrangement of the stator units, and each second sliding contact rail unit is electrically connected with the primary winding of the corresponding stator unit;
and one or more second brushes disposed on the mover or an attachment connected to the mover. Meanwhile, the second electric brush is matched with the second sliding contact rail, and along with the movement of the rotor, the second electric brush is arranged on the second sliding contact rail unit and continuously contacts and moves among a plurality of second sliding contact rail units. The second brush is electrically connected to a drive output terminal of the drive controller.
It should be noted that, according to the general knowledge of a person skilled in the art, if viewed from the perspective of the drive controller, there are:
the stator unit may be referred to as a unit motor stator module 1;
the second sliding contact rail can be called a load side discontinuous sliding contact rail 3, wherein the load side is the load output side of the drive controller;
the second brush may be referred to as the load side brush 4;
the sliding contact unit of the second sliding contact rail can be called a conductor section of the load-end intermittent sliding contact rail;
the first sliding contact rail may be referred to as power supply side sliding contact rail 6, where power supply side refers to the power supply input terminal of the drive controller;
the first brush may be referred to as a power source end brush 7.
According to one or more embodiments, as shown in fig. 1, a linear motor transport system includes a transport track, a plurality of unit motor stator modules 1, and one or more unit motor mover modules. The transportation track is fixed in frame or basis on, and unit motor stator module 1 sets up in the transportation track, and unit motor active cell module sets up on active cell 2 or car, and every unit motor stator module 1 includes unit motor primary winding, still includes drive controller 8 and bi-polar sliding contact power supply unit. The double-end sliding contact power supply device comprises an input end power supply mechanism and an output end power supply mechanism; the driving controller 8 is positioned on the rotor or the car, the input end 81 of the driving controller 8 is connected with the power bus through the input end power supply mechanism, and the output end 82 of the driving controller 8 is connected with at least one unit motor stator primary winding through the output end power supply mechanism;
the input end power supply mechanism comprises a power end sliding contact rail 6 and a power end electric brush 7; the power supply end sliding contact rail 6 is arranged along the moving direction of the mover of the transportation rail and is connected with a power bus, and the power supply end electric brush 7 is connected with an input end 81 of the driving controller 8, is arranged on the mover or the car through a first insulating part 9, and is matched with the power supply end sliding contact rail 6.
The output end power supply mechanism comprises a load end intermittent sliding contact rail 3 and a load end electric brush 4, the load end intermittent sliding contact rail 3 is arranged along the moving direction of the mover of the transportation track and is connected with the primary winding 1 of the multi-section unit motor, the load end electric brush 4 is connected with the output end 82 of the driving controller 8, is arranged on the mover or the lift car through a second insulating part 5 and is matched with the load end intermittent sliding contact rail 3;
the load end electric brush 4 is matched with the load end intermittent sliding contact rail 3 for use to supply power to the primary winding of the corresponding unit motor; in the moving process of the rotor 2, generally, only the primary winding of the unit motor coupled or adjacent to the rotor 2 and connected with the load end intermittent sliding contact rail 3 is in a power-on state, and the primary winding of the unit motor in a non-overlapped (non-coupled) area with the rotor 2 is in a power-off state due to no load end electric brush 4 being switched on, so that the sliding contact segmented power supply is realized.
The power supply side brush 7 and the load side brush 4 are connected to the mover 2 through a first insulator 9 and a second insulator 5, respectively, and move as the mover 2 moves. Because a section of unit motor rotor module is correspondingly coupled with a section of unit stator module, the number of groups of the load end electric brushes 4 is generally less than or equal to the number of sections of the unit motor rotor module, namely N sections of unit motor rotor modules are provided, the maximum N groups of load end electric brushes 4 are arranged, namely N sections of unit motor stator modules 1 coupled with the N sections of unit motor rotor modules are provided at most at any moment to obtain electric energy. However, in some cases, such as high-speed operation, in order to reliably supply power, one or more sections of unit stators without mover coupling need to be pre-energized in advance, and one or more groups of load end brushes can be correspondingly added, so that the number of groups of load end brushes can be larger than the number of sections of unit motor mover modules.
In this embodiment, the power supply terminal sliding contact rail 6 includes a continuous conductor, and the continuous conductor is connected to a power supply bus; the load end intermittent sliding contact rail 3 comprises a plurality of conductor sections, the conductor sections are arranged at intervals along a linear direction or a curve direction, an insulator or an insulating interval (gap) is arranged between every two adjacent conductor sections, and the primary windings of each unit motor are respectively connected with the corresponding conductor sections; the length of the conductor segment is close to or equal to the length of the unit motor.
And when the load end electric brush 4 is positioned at the position of the primary winding of the corresponding unit motor, the electric energy of the load end electric brush 4 is fed to the primary winding of the corresponding unit motor through the load end intermittent sliding contact rail 3, so that the primary winding of the unit motor is supplied in a segmented manner.
In this embodiment, the input end power supply mechanism is a single-phase, two-phase, three-phase or multi-phase input end power supply mechanism; the output end power supply mechanism is a single-phase, two-phase, three-phase or multi-phase output end power supply mechanism. The input end power supply mechanism is a direct current or alternating current input end power supply mechanism; the output end power supply mechanism is a direct current or alternating current output end power supply mechanism. As an optimization, the general power bus power supply is direct current, the input end power supply mechanism is a direct current input end power supply mechanism, the output end 82 of the driving controller 8 is alternating current voltage, and the output end power supply mechanism is an alternating current output end power supply mechanism.
Preferably, the power supply end sliding contact rail 6 and the power supply end electric brush 7 can directly adopt standard (continuous) sliding contact rails and electric brush products on the market; according to different use scenes, the load end intermittent sliding contact rail 3 and the load end electric brush 4 can directly adopt standard sliding contact rails (generally, continuous conductors need to be divided or a plurality of standard sliding contact rails are arranged at intervals in a segmented mode) and electric brushes (the electric brushes are possibly required to be customized when the insulation interval is large) products, and can also be customized according to the standard of the standard continuous conductor sliding contact rails and the electric brush products, so that the intermittent sliding contact rails formed by a series of discontinuous conductors are formed. Furthermore, as can be seen from the schematic diagram of fig. 1, the purpose of providing the insulator or the insulation gap (interval) is to form a distinct insulation break between two adjacent conductor segments (sliding contact units) of the sliding contact rail, so as to ensure that the two are electrically insulated, the insulator can be a common wear-resistant insulating material, the air gap or the air gap itself can also be regarded as an insulator, and the surface of the insulator is generally lower than the surface of the conductor segment (sliding contact unit) of the sliding contact rail, since the surface of the sliding rail conductor section (sliding contact unit) may be worn due to long running time (generally, the abrasion degree of the brush is larger, and the sliding rail conductor section needs to be replaced regularly, and the abrasion degree of the sliding rail conductor section is much smaller), the condition that the brush can still pass through the insulator smoothly is ensured, and the load side interrupted trolley rail 3 and the load side brushes 4 are rationally designed, customized and matched according to the insulation interval between the adjacent conductor sections (trolley units) and the required switching timing.
In this embodiment, in order to ensure safe operation, the device further includes a contactor or a power switch with a normally open and normally closed bidirectional main contact, the contactor or the power switch is connected to the power bus or the output end 82 of the previous power supply or the drive controller 8 of the power bus, the normally closed main contact of the contactor or the power switch is in short circuit with the output end of the drive controller, and the contactor or the power switch cooperates with the output end power supply mechanism and the unit motor primary winding connected thereto to form a unit motor winding short circuit power generation and braking protection circuit.
The driving controller 8, the power end brush 7 and the load end brush 4 are all positioned on the rotor or the car, the input end 81 and the output end 82 of the driving controller 8 are respectively connected with the power end sliding contact rail 6 and the load end intermittent sliding contact rail 3 on the track through the power end brush 7 and the load end brush 4, the primary windings of each unit motor on the track are respectively connected with the conductors in the corresponding load end intermittent sliding contact rail 3, accurate and reliable segmented power supply of the primary windings of the unit motor and accurate control of the distance between the front and the rear adjacent cars are realized, the primary windings of the unit motors which are arranged along the transportation track in segments are electrified for a short time to allow high current density, the size of the linear motor is greatly reduced, the secondary (permanent magnet) serving as the rotor is small in size, light in self weight and free of power supply, the effective load for vertical lifting is large, the protection of the secondary (permanent magnet) is simple, the system maintenance is convenient, the principle of the intermittent sliding contact segmented power supply of the primary windings and the continuous sliding contact power supply of the rotor is feasible, the technology is mature, the operation is reliable, the number of the mover side (vehicle-mounted) driving controller 8, the auxiliary sensor, cables and the like is minimum, only the unit motor stator module, the power supply end sliding contact rail 6, the load end intermittent sliding contact rail 3, a necessary power supply and a scheduling monitoring system are laid on the track, the cost of the whole system is low, only the dead weight of the frequency converter (inverter) and other vehicle-mounted driving controllers and electric brushes is added on the mover (car), and the total weight of the mover is still smaller than that of a moving coil type (moving primary coil) structure. Under the same total cost, the vertical lifting effective load is far larger than the conventional moving coil structure, is close to or even larger than the conventional moving magnetic structure, and the system reliability and the lifting efficiency are greatly increased.
In this embodiment, the input end 81 of the driving controller is connected to the power bus through the input end power supply mechanism, the output end 82 of the driving controller is connected to at least one section of the unit motor module through the second single-contact sliding contact power supply structure, the power end electric brush 7 is electrically connected to the input end 81 of the controller, the load end electric brush 4 is electrically connected to the output end 82 of the controller, and then the two sections of the unit motor modules respectively slide on the power end sliding contact rail 6 and the load end intermittent sliding contact rail 3 simultaneously. In addition, along with the rapid progress and the more practical of the wireless power supply technology, the wireless power supply technology adopted for input or output enables engineering application and operation maintenance to be simpler, easier and more advantageous, and better conforms to the advanced technical characteristics of the new era, and in view of implementation effect, the linear motor has a series of advantages of a traditional moving coil type scheme theoretically, for example, the driving controller 8 is positioned on the side of the rotor car, the control system and power supply are simple, the control is accurate, and the like, and also has a series of advantages of a moving magnet type scheme, for example, short-time electrification of a primary winding of a stator allows a high-current density linear motor to be small in size, the rotor is light, the vertical lifting effective load is large, the secondary permanent magnet protection is simple, and the system maintenance is convenient.
In contrast, the chinese patent application CN201510748173.6 "linear motor sliding contact type segmented power supply switching device" is essentially characterized in that a single-port (load end) "bridging" dual-contact sliding contact type power supply switching structure scheme is adopted only at the load end (motor end) on the stator track side: two sliding contact rails (a power supply continuous sliding contact rail and a unit motor discontinuous sliding contact rail) are arranged in the rail, one group or a plurality of groups of electric brushes only connected with an insulating rod of the rotor are arranged on the rotor, two ends of each electric brush cross the two sliding contact rails (the power supply continuous sliding contact rail and the unit motor discontinuous sliding contact rail) to slide, the electric energy of the power supply continuous sliding contact rail is transmitted to the unit motor discontinuous sliding contact rail through the electric brushes, namely two single-contact sliding contact resistors are connected in series, the total sliding contact resistance is doubled compared with the conventional single contact, high-frequency impurity consumption, electromagnetic interference, contact electric arc, energy consumption and the like are correspondingly doubled, the operation performance and the reliability of the system are necessarily directly influenced, and meanwhile, the serious electromagnetic compatibility problem is also brought. In addition, the technical scheme in the document is only in a local sense for improving a load end unit motor stator winding section power supply switching scheme, and the overall scheme and the implementation effect of the technical scheme still belong to the traditional moving magnetic structure scheme, and still have most defects of the moving magnetic structure, for example, a driving controller and a sensor on a track are numerous, particularly, a direct-drive multi-car three-dimensional (elevator) transportation system in the application fields of super high buildings with the height of kilometers and super deep mines with the depth of kilometers (such as 5000-10000 meters) and the like, in order to realize the accurate control and the spacing positioning of adjacent cars, a driving controller needs to be arranged basically every several stator units (in practical engineering application, various factors such as processing, deformation, transportation and the like are considered, the length of the stator units is limited, generally about 0.3-1 meter), and a great number of driving controllers need to be additionally arranged on a great number of transportation tracks of the orbital transfer layers (each orbital transfer layer has several movement layers A plurality of drive controllers are required to be arranged on the conveying track), the control system is very complex, the precise control of a plurality of cages is difficult to implement, the overall cost is high, and the problems of low system reliability and lifting efficiency and the like can not be solved. The present embodiment solves the above problems well.
In one or more embodiments, in the linear motor transportation system, the input end power supply mechanism is a single-phase, two-phase, three-phase or multi-phase input end power supply mechanism; the output end power supply mechanism is a single-phase, two-phase, three-phase or multi-phase output end power supply mechanism.
As a typical application, the load motor is generally a three-phase ac motor, the driving controller is generally an ac-dc-ac converter (generally including a rectifier, a filter circuit, an inverter, etc.), and it is necessary to convert the power ac power into dc power through the rectifier, and then invert the dc power into ac power with a desired frequency through the inverter to supply the ac power to the load motor. In order to reduce the dead weight and the loss of the drive controller, as an optimization scheme, the output of a rectifier, a filter circuit and other direct current sides with larger volumes can be uniformly distributed on the track side as a direct current power supply bus, so that the drive controller is mainly used as an inverter, the whole power supply system is greatly simplified, and the vertical lifting potential energy type load can conveniently feed back electric energy to a power grid (the direct current power supply bus) when a rotor or a lift car is lowered (goes downwards), and can be supplied to a lifting section motor (the lift car) or other loads on the same bus for use. Based on the above typical application and principle, fig. 2 is a schematic diagram of dc input/three-phase ac output sliding contact power supply of a linear motor system having three-section unit movers, in which the mover 2 is composed of three-section unit movers (which can be correspondingly coupled with three-section unit stators), each section of unit mover is provided with a set of A, B, C three-phase (three) load end brushes 4, the three-section unit movers have three sets of nine load end brushes 4, each set A, B, C of three load end brushes 4 is connected with a corresponding output end 82 of a driving controller, a power bus is a dc power supply, a power end sliding contact rail 6 is two dc sliding contact rails respectively connected with a positive dc power supply bus and a negative dc power supply bus, the input end 81 of the driving controller is connected with a power end brush 7, the output end 82 of the driving controller is connected with a load end brush 4, and electric energy is output to a corresponding three-phase ac unit motor winding 1 through a load end discontinuous type three-phase ac sliding contact rail 3, the power supply side brushes 7 are arranged on the mover or the car through the first insulator 9, and the load side brushes 4 are arranged on the mover or the car through the second insulator 5. For clarity of illustration, only the bottom set A, B, C of three load side brushes are shown in FIG. 2 as being connected to the output 82 of the drive controller, and the other two sets of load side brushes are also connected to the output 82 of the drive controller in parallel, and will not be described again. Because the power supply end sliding contact rail 6 is a continuous sliding contact rail, in order to save the number of the sliding contact rails, one power supply end sliding contact rail 6 can be reduced theoretically to form a single (positive) direct current sliding contact rail, the other (negative) sliding contact rail is realized in a mode that a guide wheel or a sliding block or a special brush contacts a guide rail or a rack, and the guide rail or the rack generally needs to be grounded. However, the power supply effect and reliability of the latter (single rail) may not be the same as those of the former (double rail), and the problems of related process and power supply safety need to be solved and are carefully adopted.
In some cases, the power bus is a single-phase ac power, such as a common single-phase 220 v lighting power, the power supply side sliding contact rail 6 is a single-phase (two in number) ac sliding contact rail, and the input 81 of the driving controller is a single-phase ac power.
In some cases, the power bus is a two-phase ac power, the power supply side rail 6 is a two-phase cross current rail, and the input 81 of the drive controller is a two-phase ac power.
In some cases, the power bus may also be a three-phase ac, the power supply terminal trolley rail 6 is a three-phase current trolley rail, and the input 81 of the drive controller is a three-phase ac.
Generally, N power supply buses and N power supply end sliding contact rails are theoretically one less sliding contact rail so as to form N-1 sliding contact rails, the other less sliding contact rail is realized by a guide wheel or a sliding block or a special brush to contact a guide rail or a rack, and the guide rail or the rack generally needs to be grounded. However, the power supply effect and reliability of the latter (N-1) are inferior to those of the former (N), and a series of process and safety problems need to be solved, and the latter is adopted with caution.
In some cases, the output 82 of the drive controller is dc, the load side sliding contact rail 3 is a dc sliding contact rail, and the unit motor is a dc motor.
In some cases, the output 82 of the drive controller is a two-phase ac current, the load side sliding contact rail 3 is a two-phase current-intersecting sliding contact rail, and the unit motor is a two-phase ac motor.
In some cases, the output 82 of the driving controller may also be four-phase, five-phase, six-phase, etc. multi-phase ac (or dc) power, the load-side discontinuous sliding contact rails 3 are corresponding four-phase, five-phase, six-phase, etc. multi-phase ac (or dc) sliding contact rails, and the unit motors are corresponding four-phase, five-phase, six-phase, etc. multi-phase ac motors.
Generally, the output 82 of the driving controller is an N-phase alternating current, the load side discontinuous sliding contact rail 3 is an N-phase cross current sliding contact rail, and the unit motor is an N-phase alternating current motor.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the traditional linear motor drive system sectional power supply switching mechanism and control device are complex, low in reliability and high in cost, and the primary sectional linear motor vehicle-mounted drive controller dual-port contact/non-contact power supply scheme has the characteristics of simple structure, mature technology, safety, reliability, economy, applicability, high efficiency and energy conservation.
The drive controller and the power end electric brush and the load end electric brush thereof are positioned on the rotor or the car, the input end and the output end of the drive controller are respectively connected with the power end sliding contact rail and the load end intermittent sliding contact rail on the transportation track through the power end electric brush and the load end electric brush, each unit motor primary winding on the track is respectively connected with the conductor segment in the corresponding load end intermittent sliding contact rail, the accurate and reliable segmented power supply of the unit motor primary winding and the accurate control of the distance between the front and the back adjacent cars are realized, the unit motor primary winding arranged along the transportation track is electrified for a short time to allow the high current density linear motor to reduce greatly, the secondary (permanent magnet) as the rotor has small volume, light dead weight and no need of power supply, the effective load for vertical lifting is large, the secondary permanent magnet protection is simple, the system maintenance is convenient, the principle of the intermittent sliding contact segmented power supply of the primary winding and the continuous sliding contact power supply of the rotor is feasible, the technology is mature, simple and reliable, the quantity of drive controllers, auxiliary sensors, cables and the like of a vehicle-mounted frequency converter (inverter) is minimum, only a unit motor module, a power supply end sliding contact rail, a load end intermittent sliding contact rail, a necessary power supply and a scheduling monitoring system are laid on a track, the cost of the whole system is low, only the dead weights of the vehicle-mounted drive controllers and electric brushes of the frequency converter (inverter) and the like are added on a mover (car), and the total self-weight of the mover is still far smaller than that of a moving coil type (moving primary coil) structure. Under the same total cost, the vertical lifting effective load is far larger than that of a conventional moving coil structure, and is close to or even possibly larger than that of the conventional moving magnetic structure (because a large amount of cost such as a drive control system, a sensor, a cable, a segmented switching device, power consumption, maintenance cost and the like is saved, the cost is only slightly increased by about 5-10% of the lifting force of the motor, the influence of slightly reduced effective load caused by the self-weight of a drive controller and an electric brush which are increased compared with the conventional moving magnetic structure in the scheme can be completely compensated), and the reliability and the lifting efficiency of the system are greatly increased.
The invention adopts a technical mature single-contact sliding contact power supply scheme at the input end and the output end of a linear motor rotor side drive controller simultaneously, a power end electric brush and a load end electric brush are respectively and electrically connected with the input end and the output end of the drive controller, and then are respectively contacted and moved on a power end sliding contact rail and a load end intermittent sliding contact rail, which are common single-contact sliding contact power supply, the operation is reliable, the sliding contact resistance is small, the high-frequency impurity consumption, the contact arc, the energy consumption, the electromagnetic compatibility and the like are all within an acceptable range and the current standard, in addition, along with the rapid progress and the more practicability of the wireless power supply technology, the input or output adopts the wireless power supply technology, so that the engineering application and the operation maintenance are simpler, more convenient and more advantageous, and more accord with the advanced technical characteristics of the new era, viewed in implementation effect, the wireless power supply scheme has a series of advantages of the traditional moving coil scheme theoretically, for example, the driving controller is positioned on the side of the rotor car, the control system and the power supply are simple, the control is accurate, and the like, and the linear motor has a series of advantages of a moving magnet type scheme, for example, the stator primary winding is electrified for a short time to allow the high-current density linear motor to be small in size, the rotor is light, the vertical lifting effective load is large, the secondary permanent magnet protection is simple, the system is convenient to maintain, and the like.
In summary, no matter the principle topological structure or the implementation effect, the invention is obviously different from the prior art, the invention completely abandons a series of defects of moving magnet type and moving coil type structures in the background art, and provides a brand new topological structure scheme which can achieve two full advantages theoretically from the aspects of moving magnet type to moving coil type, driving controller input end to output end, contact power supply to contactless (wireless) power supply, system and global, the invention is a moving magnet type (preferred) structure on the arrangement mode of a main driving unit motor and a moving coil type (preferred) structure on the arrangement mode of a driven controller, and the technical key between the two-port contact/contactless power supply technology is a double-port contact/contactless power supply technology suitable for a primary section linear motor/vehicle-mounted driving controller structure, thereby having a series of advantages of the moving magnet type structure and the moving coil type structure, the key technology and engineering application bottleneck problems of long-standing key application fields are solved in the principle scheme, the principle structure scheme which is most economical, reasonable and preferred in certain application fields can be formed, and the linear motor multi-car magnetic levitation elevator intelligent transportation system is particularly suitable for engineering application fields such as linear motor multi-car magnetic levitation elevator intelligent transportation systems and rail transit. Therefore, the linear motor system can be completely and smoothly applied to direct-drive elevators or lifting systems, subways or magnetic levitation (intercity) trains, logistics storage (stereo garage) transportation systems, gridded automatic conveying lines and the like.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A linear motor transportation system is characterized by comprising
A stator including a plurality of stator units, the stator units having primary windings;
a mover;
and a driving controller provided on the mover and moving integrally with the mover.
2. The linear motor transport system of claim 1, wherein the primary windings of the stator units are one of single phase, two phase, three phase, or multiple phases,
when the primary windings are more than two phases, the second sliding contact rail comprises a plurality of second branch sliding contact rails, each second branch sliding contact rail is electrically connected with one phase of winding in the primary windings of the stator units, the second branch sliding contact rails comprise a plurality of second branch sliding contact rail units,
the second brush includes a plurality of second shunt brushes, each of which is in contact with one of the second shunt rails.
3. A linear motor transport system, comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover, for controlling a movement of the mover;
a first wireless transmission power supply system for supplying power to the linear motor transportation system, the first wireless transmission power supply system being disposed along a transportation track or a surrounding space formed by the stator units, the drive controller receiving power input provided by the first wireless transmission power supply system through wireless transmission;
the second sliding contact rail is a conductor and comprises a plurality of second sliding contact rail units which are sequentially arranged, the arrangement of the second sliding contact rail units corresponds to the arrangement of the stator units, and
each second sliding contact rail unit is electrically connected with the primary winding of the corresponding stator unit;
at least one second brush, which is disposed on the mover or an attachment of the mover, and at the same time,
the second brush is matched with the second sliding contact rail, along with the movement of the mover, the second brush moves on the second sliding contact rail unit in a contact manner and/or moves among a plurality of second sliding contact rail units in a continuous contact manner, and in addition,
the second brush is electrically connected with a drive output end of the drive controller.
4. A linear motor transport system, comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
a first wireless transmission power supply system for supplying power to the linear motor transportation system, the first wireless transmission power supply system being disposed along a transportation track or a surrounding space formed by the stator units, the driving controller receiving power input provided by the first wireless transmission power supply system through wireless transmission,
and the second wireless transmission power supply system is arranged on the rotor or an attachment of the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
5. A linear motor transport system, comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
a first sliding contact rail which is a conductor and is electrically connected with a power supply bus of the linear motor transportation system, a first electric brush which is arranged on the mover or an attachment connected with the mover, and at the same time,
the first electric brush is matched with the first sliding contact rail, the first electric brush moves on the first sliding contact rail in a contact manner along with the movement of the mover, and in addition,
the first electric brush is electrically connected with a power supply input end of the driving controller;
and the second wireless transmission power supply system is arranged on the rotor or an attachment connected with the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
6. A linear motor transport system, comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
the input end of the driving controller is electrically connected with a power supply bus of the linear motor transportation system through a traveling cable;
and the second wireless transmission power supply system is arranged on the rotor or an attachment connected with the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system through wireless transmission.
7. A linear motor transport system, comprising,
a stator including a plurality of stator units arranged in sequence, the stator units having primary windings;
at least one mover;
at least one driving controller provided on the mover or an attachment of the mover for controlling movement of the mover,
the input end of the driving controller is electrically connected with a power supply bus of the linear motor transportation system through a traveling cable;
the second sliding contact rail is an electric conductor and comprises a plurality of second sliding contact rail units which are sequentially arranged along the conveying track formed by the stator units, the arrangement of the second sliding contact rail units corresponds to the arrangement of the stator units, and each second sliding contact rail unit is electrically connected with the primary winding of the corresponding stator unit;
at least one second brush, which is arranged on the mover or an attachment connected with the mover, and at the same time,
the second brush and the second sliding contact rail are matched, along with the movement of the mover, the second brush continuously contacts and moves on the second sliding contact rail unit and/or among a plurality of second sliding contact rail units, and in addition,
the second brush is electrically connected with a drive output end of the drive controller.
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| CN202111504728.4A CN114123706A (en) | 2020-07-22 | 2020-07-22 | Linear motor transportation system |
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| CN202010711011.6A CN111711337B (en) | 2020-07-22 | 2020-07-22 | Linear motor and transportation system |
| CN202111504728.4A CN114123706A (en) | 2020-07-22 | 2020-07-22 | Linear motor transportation system |
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| CN113315337B (en) * | 2021-04-29 | 2022-08-12 | 天津中德应用技术大学 | Selective double-rotor permanent magnet linear motor system |
| CN113394920A (en) * | 2021-06-24 | 2021-09-14 | 上海卓荃电子科技有限公司 | Motor rotor temperature measurement system and intelligent temperature control type motor |
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