CN114123706B - Linear motor transportation system - Google Patents
Linear motor transportation system Download PDFInfo
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- CN114123706B CN114123706B CN202111504728.4A CN202111504728A CN114123706B CN 114123706 B CN114123706 B CN 114123706B CN 202111504728 A CN202111504728 A CN 202111504728A CN 114123706 B CN114123706 B CN 114123706B
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Abstract
A linear motor transport system comprising: a stator including a plurality of stator units having primary windings; a mover; and a driving controller provided to the mover and integrally moving with the mover. The linear motor system has the advantages of simple structure, safety, reliability, economy, applicability, high efficiency, energy conservation, moving coil type and moving magnetic type structural schemes, and solves the technical bottlenecks and engineering application problems of the primary sectional linear motor driving system, such as power supply switching in the fields of lifting transportation and track (magnetic levitation) transportation, complex control system, lower 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 the application fields of linear motor subways, linear motor automatic assembly lines, direct-drive vertical lifting systems, magnetic levitation transportation and the like. Linear motors, especially vertical lifting permanent magnet linear motors, generally adopt a long primary and short secondary moving magnet (moving secondary) structure, or a long secondary and short primary moving coil structure, and adopt what structure and how to reliably supply power and control, so that the linear motor driving system becomes one of key technologies of a linear motor driving system.
For the linear motor, if a moving coil type structure is selected, the power supply is relatively simple, the cable can be adopted for direct power supply or contact power supply or non-contact power supply, a frequency converter (inverter) is positioned on a rotor or a car, and the control is relatively simple. However, the long secondary permanent magnet is difficult to protect, and the primary coil serving as a 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 dead weight of the primary coil and the iron core are large. And the frequency converter (inverter) is positioned on the rotor, so that the dead 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 the moving magnetic structure is selected, the primary coil and the driving controller are arranged along the track, and the advantages are that the primary coil is electrified for a short time, the volume and the dead weight of the linear motor can be reduced, the volume and the dead weight of a secondary permanent magnet serving as a rotor are smaller, the vertical lifting effective load is large, the lifting force utilization rate of the linear motor is high, the protection of the secondary permanent magnet is simple, the maintenance is convenient, the power supply of the rotor is simple, and the like. However, the stator coil needs to be powered by sections, and the number of the sections of unit motors is large, so that the number of the sections of power supply switching devices is large, and the section power supply switching control system can cause the problems of high construction cost, difficult 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, which 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 plurality of driving controllers for switching power supply control to a stator section are required to be distributed along the way in the prior linear motor system.
The linear motor structure comprises a stator, a rotor, a driving controller and a power supply system. The stator includes a plurality of stator units having primary windings; the driving controller is arranged on the rotor and moves integrally with the rotor. The power supply system supplies power to the stator through a driving controller arranged on the rotor. The power supply system can be a wired power supply mode with contact or a wireless power supply mode without contact.
The linear motor system provided by the embodiment of the invention has the advantages of simple structure, safety, reliability, economy, practicability, high efficiency, energy conservation, moving coil type and moving magnetic type structural schemes, and solves the technical bottlenecks and engineering application problems of the primary sectional linear motor driving system, such as power supply switching, complex control system, lower reliability, high cost and the like in the fields of transportation and track (magnetic levitation) transportation.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present 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, wherein the rotor is provided with a plurality of grooves,
3-Intermittent sliding contact rail at load end,
4-A load-side brush,
5-A second insulating member,
6-A power supply end sliding contact rail,
7-A power source end brush,
8-A drive controller,
81-Power input of the drive controller, 82-load output of the drive controller, 9-first insulator.
Detailed Description
At present, a moving-magnet type permanent magnet linear motor has power devices such as an IGBT (insulated gate bipolar transistor), a thyristor, a solid-state relay and the like or power switch electronic switching modes and electromagnetic and mechanical switching modes such as a contactor and the like for a segmented power supply system which needs to be arranged for a stator module. The number of the change-over switches and the frequency converters (inverters) is large, a large number of position detection sensors are required to be arranged along the track, special protection circuits, processing devices such as an upper computer and the like are required, the number of intermediate links is large, and the defects that the loss of the idle consumption current (which is several times larger than the current of a normal motor) of the electronic switch, the electromagnetic switch coil and the pre-electrified primary coil which is not coupled with the rotor is large, the circuit is complex, the cost is high, the malfunction of the sensors or the contactors is caused, the switching is unreliable and the like are overcome. The problem of synchronous control of a plurality of frequency converters (inverters) for simultaneously controlling one car (car body) is also required to be solved, so that the reliability of the whole system is greatly tied to whether a segmented power supply system is mature and reliable or not, 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 of a primary winding of a unit motor, but the power supply (i.e. an output end or a load end power supply of a driving controller) is located on a stator track, in order to accurately control different unit motor groups coupled with multiple cabs (movers) respectively and to avoid excessive pre-energizing coil air-consumption energy (the pre-energizing coil air-consumption current uncoupled with the movers is several times greater than that of a normal motor current), theoretically, a small distance is required (generally equivalent to the length of the movers, the shorter the interval is, the smaller the controllable interval between two adjacent cabs is, but the higher the cost is, the length of one unit motor is theoretically the best, but the number and the cost of the driving controllers are the highest), so that a large number of driving controllers and position detection sensors are required to be arranged along the stator track or foundation, in order to lift a transportation system for the long-distance linear motor multiple cabs, the number of driving controllers and the sensors and the cables are multiple, and the difficulty of the number of the sensors and the cables on the track are very large, and the difficulty of the number of the driving controllers and the sensors and the difficulty of operating can be very difficult to accurately control the two or more than the two-speed motor and the multiple-speed motor winding can be simultaneously, and the two-speed motor winding and the multiple-speed can be simultaneously controlled.
According to one or more embodiments, a linear motor transport system includes a stator, one or more movers, one or more drive controllers, and a power supply system that employs wireless transmission power, including a first wireless transmission power supply system and a second wireless transmission power supply system. Wherein,
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 movement 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 a transportation track formed by the stator units. The drive controller receives, via wireless transmission, an electrical energy input provided by the first wireless transmission power supply system. The second wireless transmission power supply system is arranged on the rotor, and the primary winding of the stator unit receives electric energy input provided by the second wireless transmission power supply system in a wireless transmission mode along with continuous movement of the rotor.
The first or second wireless transmission power supply system may be an inductive wireless transmission power supply system, such as a common wireless transmission power supply system including electromagnetic induction type and electric field induction type, a wireless transmission power supply system including electromagnetic wave type, resonance type, or another novel wireless transmission power supply system including reactive type. The driving controller may control not only the mover and the stator but also loads such as lighting and air conditioning.
In accordance with one or more embodiments, a linear motor transport system includes a stator, one or more movers, 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 movement of the rotor. The linear motor transportation system adopts a contact type power supply mode, and 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 an electric 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 attached matter connected to the mover. The first brush is electrically connected with a power input end of the drive controller. Simultaneously, first brush and first smooth touch rail cooperation setting, along with the removal of active cell, first brush contact and remove on first smooth touch rail.
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 distributed along the transportation rail formed by the stator units, the distribution of the second sliding contact rail units corresponds to that 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 which are arranged on the rotor or attachments connected with the rotor, meanwhile, the second electric brushes are matched with the second sliding contact rail, and along with the movement of the rotor, the second electric brushes are arranged on the second sliding contact rail unit and continuously contact and move among the second sliding contact rail units. The second brush is electrically connected to a drive output terminal of the drive controller.
An insulator or an insulation gap is provided between the second trolley rail units, so that the second brushes move from one second trolley rail unit to the other through the insulation gap or contact movement of the insulator.
The cooperation arrangement between the sliding contact rail and the electric brush comprises rolling, sliding and a cooperation arrangement mode with rolling and sliding. That is, the first brush surface is in sliding or rolling contact or both sliding and rolling contact with the first trolley rail surface, and the first brush is in sliding or rolling contact or both sliding and rolling contact on the first trolley rail as the mover moves. The second brush surface is in sliding or rolling contact or both sliding and rolling contact with the second trolley rail surface, and the second brushes are continuously in sliding or rolling contact or both sliding and rolling contact on the second trolley rail units and among the plurality of second trolley rail units along with the movement of the mover.
Preferably, the linear motor transportation system comprises a transportation rail, and the stator is arranged on the transportation rail. The stator (or the transportation rail) and the rotor or attachments connected with the rotor can be provided with braking safety devices, such as a braking rail and a brake (safety tongs), wherein the common braking rail is provided with a T-shaped rail, a rack and the like, the common braking rail is provided with a caliper disc brake, a caliper disc safety tongs, a gear type brake, a gear type safety tongs and the like, and the braking safety devices can be independently arranged or can be selectively arranged according to requirements. In general, the stator, the guide rail, the brake rail are arranged on the transport rail or are themselves part of the transport rail, and correspondingly, the guide wheel (slide) set, the brake (safety gear) are arranged on the rotor or the attachment connected to the rotor in cooperation with the guide rail, the brake rail, respectively.
Preferably, the attachment on the mover is a container for carrying a car or object.
Preferably, in this embodiment, the linear motor transportation system may be powered by direct current or alternating current.
In accordance with one or more embodiments, a linear motor transport system, the system includes,
A stator including a plurality of sequentially arranged stator units having primary windings;
At least one mover;
At least one driving controller which is arranged on the rotor or the attachment of the rotor and is used for controlling the motion of the rotor;
the first wireless transmission power supply system is used for supplying power to the linear motor transportation system, the first wireless transmission power supply system is arranged along a transportation track or surrounding space formed by the stator units, and the driving controller receives electric energy input provided by the first wireless transmission power supply system through wireless transmission;
the second sliding contact rail is an electric conductor and comprises a plurality of second sliding contact rail units which are sequentially distributed, the distribution of the second sliding contact rail units corresponds to the distribution of the stator units, and
Each second sliding contact rail unit is electrically connected with the corresponding primary winding of the stator unit;
At least one second brush provided on the mover or the attachment of the mover, and at the same time,
The second electric brush is matched with the second sliding contact rail, and moves on the second sliding contact rail unit in a contact way along with the movement of the mover, and/or moves among a plurality of second sliding contact rail units in a continuous contact way,
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 includes,
A stator including a plurality of sequentially arranged stator units having primary windings;
At least one mover;
at least one driving controller which is arranged on the rotor or the attachment of the rotor and is used for controlling the motion of the rotor,
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 an electric power input provided by the first wireless transmission power supply system through wireless transmission,
The second wireless transmission power supply system is arranged on the rotor or the 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 includes,
A stator including a plurality of sequentially arranged stator units having primary windings;
At least one mover;
at least one driving controller which is arranged on the rotor or the attachment of the rotor and is used for controlling the motion of the rotor,
The first sliding contact rail is an electric conductor, is electrically connected with a power supply bus of the linear motor transportation system, is provided with a first electric brush, is arranged on the rotor or an attachment connected with the rotor, and simultaneously,
The first electric brush is matched with the first sliding contact rail, and moves on the first sliding contact rail in a contact way along with the movement of the mover,
The first electric brush is electrically connected with the power input end of the driving controller;
The second wireless transmission power supply system is arranged on the rotor or the 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 includes,
A stator including a plurality of sequentially arranged stator units having primary windings;
At least one mover;
at least one driving controller which is arranged on the rotor or the attachment of the rotor and is used for controlling the motion of the rotor,
The input end of the driving controller is electrically connected with a power supply bus of the linear motor transportation system through a travelling cable;
The second wireless transmission power supply system is arranged on the rotor or the 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 transport system includes a stator, one or more movers, 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 the attachment of the rotor and is used for controlling the motion of the rotor, and the input end of the driving controller is electrically connected with the power supply bus of the linear motor conveying system through a travelling 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 distributed along a transportation rail formed by the stator units, the distribution of the second sliding contact rail units corresponds to that of the stator units, and each second sliding contact rail unit is electrically connected with a primary winding of the corresponding stator unit;
One or more second brushes provided on the mover or the attached matter connected to the mover. Simultaneously, the second electric brush is matched with the second sliding contact rail, and along with the movement of the mover, the second electric brush continuously contacts and moves on the second sliding contact rail unit and among the plurality of second sliding contact rail units. The second brush is electrically connected with a drive output end of the drive controller.
It should be noted that, according to the general knowledge of those skilled in the art, if considered in terms of the drive controller perspective, there are:
The stator unit may be referred to as a unit motor stator module 1;
The second trolley rail may be referred to as a load-side intermittent trolley rail 3, where the load side is the load output side of the drive controller;
The second brush may be referred to as a load end brush 4;
The trolley units of the second trolley rail may be referred to as conductor segments of the load-side intermittent trolley rail;
The first trolley rail may be referred to as a power supply end trolley rail 6, where the power supply end refers to the power supply input end of the drive controller;
The first brush may be referred to as a power end brush 7.
According to one or more embodiments, as shown in fig. 1, a linear motor transport system includes a transport rail, a plurality of unit motor stator modules 1, one or more unit motor sub-modules. The transportation track is fixed on a frame or a foundation, the unit motor stator module 1 is arranged in the transportation track, the unit motor rotor module is arranged on the rotor 2 or the lift car, each unit motor stator module 1 comprises a unit motor primary winding, and the unit motor stator module further comprises a driving controller 8 and a double-end sliding contact power supply device. 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 end sliding contact rail 6 is arranged along the moving direction of the mover of the conveying track and is connected with a power bus, the power end electric brush 7 is connected with the input end 81 of the driving controller 8, is arranged on the mover or the lift car through the first insulating piece 9 and is matched with the power 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, wherein the load end intermittent sliding contact rail 3 is arranged along the moving direction of a rotor of the conveying rail and is connected with a multi-section unit motor primary winding 1, the load end electric brush 4 is connected with an output end 82 of a drive controller 8, is arranged on the rotor or a lift car through a second insulating piece 5 and is matched with the load end intermittent sliding contact rail 3;
The load end brush 4 is matched with the intermittent sliding contact rail 3 at the load end to supply power for the primary winding of the corresponding unit motor; in the moving process of the rotor 2, the primary winding of the unit motor which is generally only coupled with or adjacent to the rotor 2 and is connected with the intermittent sliding contact rail 3 at the load end is in an electrified state, and the primary winding of the unit motor in a non-overlapping (non-coupling) area of the rotor 2 is in an outage state due to the fact that no electric brush 4 at the load end is connected, so that the sectional power supply of the sliding contact is realized.
The power source end brush 7 and the load end brush 4 are connected to the mover 2 through the first insulator 9 and the second insulator 5, respectively, and the follower 2 moves to move. Because a segment of unit motor sub-module is coupled with a segment of unit stator module correspondingly, the number of groups of the load end brushes 4 is generally smaller than or equal to the number of segments of the unit motor sub-module, namely, N segments of unit motor sub-modules exist, and at most N groups of load end brushes 4 are arranged, namely, at most N segments of unit motor stator modules 1 coupled with N segments of unit motor sub-modules acquire electric energy at any moment. However, in some cases, such as high-speed operation, for reliable power supply, one or more sections of unit stators without rotor coupling need to be pre-electrified in advance, and one or more groups of load end brushes can be correspondingly increased, so that the number of groups of the load end brushes may be larger than the number of sections of the unit motor rotor module.
In this embodiment, the power supply end sliding contact rail 6 includes a continuous conductor, and the continuous conductor is connected to a power supply bus; the intermittent sliding contact rail 3 at the load end comprises a plurality of conductor sections which are arranged at intervals along a straight line direction or a curve direction, an insulator or an insulation interval (gap) is arranged between every two adjacent conductor sections, and primary windings of all unit motors are respectively connected with the corresponding conductor sections; the length of the conductor segments is close to or equal to the length of the unit motor.
The power supply on the power end sliding contact rail 6 continuously supplies power to the driving controller 8 and the lift car through the power end electric brush 7, when the load end electric brush 4 is positioned at the position corresponding to the primary winding of the unit motor, the electric energy of the load end electric brush 4 is fed to the primary winding of the unit motor through the intermittent sliding contact rail 3 at the load end, and the sectional power supply of the primary winding of the unit motor is realized.
In this embodiment, the input power supply mechanism is a single-phase, two-phase, three-phase or multi-phase input 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 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 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 rail and electric brush products in the market; according to different use scenes, the intermittent sliding contact rail 3 at the load end and the electric brush 4 at the load end can directly adopt standard sliding contact rails (continuous conductors are generally required to be subjected to segmentation treatment 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), and can also be customized according to the requirements by referring to the standard continuous conductor sliding contact rails and electric brush product standards, so that the intermittent sliding contact rail formed by a series of discontinuous conductors is formed. In addition, as can be seen from the schematic fig. 1, the purpose of providing an insulator or an insulation gap (interval) is to form a distinct insulation break between two adjacent conductor segments (wiping units) of the wiping rail, ensure that the two are electrically insulated, the insulator can be a common relatively wear-resistant insulating material, the air gap or void itself can also be regarded as an insulator, and the surface of the insulator is generally lower than the surface of the conductor segments (wiping units) of the wiping rail, because the running time is longer, the surface of the conductor segments (wiping units) of the wiping rail may wear (generally the wear of the brushes is greater and needs to be replaced regularly, the abrasion of the conductor segments of the wiping rail is relatively smaller), in this case ensuring that the brushes can still pass through the insulator smoothly, and reasonably design, customize and match the intermittent wiping rail 3 and the load end brushes 4 according to the insulation interval between adjacent conductor segments (wiping units) and the required switching timing.
In this embodiment, to ensure safe operation, the device further includes a contactor or a power switch with a normally open and normally closed bidirectional main contact, where the contactor or the power switch is connected to the power bus or the output end 82 of the power supply or the driving controller 8 at the previous stage of the power bus, and the normally closed main contact of the contactor or the power switch shorts the output end of the driving controller, and cooperates with the power supply mechanism at the output end and the primary winding of the unit motor connected with the power supply mechanism at the output end to form a short circuit power generation braking protection circuit for the unit motor winding.
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, each unit motor primary winding on the track is respectively connected with a conductor in the corresponding load end intermittent sliding contact rail 3, the accurate and reliable segmented power supply of the unit motor primary winding and the accurate control of the spacing between the front car and the rear car are realized, the unit motor primary winding arranged along the transportation track in a segmented mode is short-time power supply to allow high current density, the linear motor volume is greatly reduced, the secondary (permanent magnet) serving as the rotor is small in volume and light in dead weight without power supply, the vertical lifting effective load is large, the secondary (permanent magnet) is protected simply, the system is convenient to maintain, the intermittent sliding contact segmented power supply of the primary coil and the rotor are feasible in a continuous sliding contact power supply principle, the technology is mature, the running is reliable, the number of the unit motor stator module, the power supply module 6 and the power supply end sliding contact rail 6 and the auxiliary sensor and the cable are only paved on the track is low, the whole cost is increased, the whole load side (car) is still lower than that the current consumption of the current sensor is required, the whole system is still has the current consumption is increased, and the cost is lower than that the current consumption is increased, and the whole system is low, and the cost is required. At the same overall cost, the vertical lift payload is much larger than conventional moving coil structures, approaching or even larger than conventional moving magnet structures, and the system reliability and lift 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 unit motor module through the second single-contact sliding contact power supply structure, the power end brush 7 is electrically connected to the input end 81 of the controller, the load end brush 4 is electrically connected to the output end 82 of the controller, and then slides on the power end sliding contact rail 6 and the load end intermittent sliding contact rail 3 respectively at the same time. In addition, along with the rapid progress and more practical implementation of the wireless power supply technology, the input or output adopts the wireless power supply technology, so that engineering application and operation maintenance are simpler, more convenient and feasible, more advantageous, more consistent with the advanced technical characteristics of the new era, and in terms of implementation effect, the system has a series of advantages of the traditional moving coil scheme, such as that the driving controller 8 is positioned at the side of a rotor car, a control system and power supply are simple, the control is accurate, and the like, and the system has a series of advantages of the moving magnetic scheme, such as that the short-time power-on of a stator primary winding 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 is convenient to maintain.
In contrast, the essential characteristics of the chinese patent application CN201510748173.6 "linear motor sliding contact type segmented power supply switching device" patent are that only a single-port (load end) "bridging" double-contact sliding contact power supply switching structural scheme is adopted at the load end (motor end) of the stator track side: two sliding contact rails (a power supply continuous sliding contact rail and a unit motor intermittent sliding contact rail) are arranged in the rail, one or more groups of electric brushes which are only connected with the insulating rod of the rotor are arranged on the rotor, two ends of each electric brush transversely slide on the two sliding contact rails (the power supply continuous sliding contact rail and the unit motor intermittent sliding contact rail), electric energy of the power supply continuous sliding contact rail is transmitted to the unit motor intermittent sliding contact rail through the electric brushes, the electric energy is equivalent to series connection of two single-contact sliding contact resistors, the total sliding contact resistance is doubled compared with that of a conventional single contact, and high-frequency impurity consumption, electromagnetic interference, contact arc, energy consumption and the like are correspondingly doubled. In addition, the improvement of the technical scheme in the document on the sectional power supply switching scheme of the stator winding of the motor of the load end unit is only in a local sense, the overall scheme and implementation effect of the technical scheme still belong to the traditional moving magnetic structure scheme, most of the defects of the moving magnetic structure still exist, for example, the number of driving controllers and sensors on rails and the number of cables are large, particularly, a direct-drive multi-car three-dimensional (elevator) transportation system in the application fields of ultra-high-rise buildings with thousands of meters and ultra-deep mines with depths of 5000-10000 meters (for example), in order to realize the accurate control and spacing positioning of adjacent cars, one driving controller is required to be arranged basically every other stator units (in practical engineering application, various factors such as processing, deformation and transportation are considered), the length of the stator units is limited, and the number of driving controllers is also required to be additionally arranged on a plurality of transportation rails with track transfer layers (a plurality of driving controllers are required to be arranged on each track transfer layer, a plurality of transportation rails are required to be arranged on a plurality of track transfer layers), the control system is very complex, the accurate control is difficult to realize the accurate control of the adjacent cars, the overall control is difficult, the problem that the overall control is not high in reliability and the system cannot solve. The present embodiment solves the above problems well.
In one or more embodiments, in the linear motor transport system, the input power mechanism is a single-phase, two-phase, three-phase or multi-phase input power 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 drive controller is generally an ac-dc-ac converter (generally including a rectifier, a filter circuit, an inverter, etc.), and the ac power is required to be converted into dc power by the rectifier and then converted into ac power with a required frequency by the inverter to be supplied to the load motor. In order to reduce the dead weight and loss of the driving controller, as an optimization scheme, the output of the direct current side such as a rectifier and a filter circuit with larger volume can be uniformly arranged on the track side as a direct current power bus, so that the driving controller is mainly used as an inverter, the whole power supply system is greatly simplified, and the driving controller has the advantages that for a vertical lifting potential energy type load, when a rotor or a car descends (descends), the driving controller can conveniently feed back electric energy to a power grid (the direct current power bus) to supply the electric energy to a rising section motor (the car) or other loads on the same bus. Based on the typical application and principle, fig. 2 is a schematic diagram of a dc input/three-phase ac output trolley power supply of a linear motor system with three-section unit movers, in which, the mover 2 is composed of three-section unit movers (which can be correspondingly coupled to three-section unit stators), each section of unit mover is provided with a group A, B, C of three-phase (three) load-end brushes 4, three groups A, B, C of three load-end brushes 4 are all connected with corresponding output ends 82 of a driving controller, the power bus is a dc power supply, the power-end trolley rail 6 is two dc trolley rails respectively connected with positive and negative dc power buses, an input end 81 of the driving controller is connected with a power-end brush 7, an output end 82 of the driving controller is connected with the load-end brushes 4, electric energy is output to the corresponding three-phase ac unit motor windings 1 through the load-end intermittent three-phase trolley rails 3, the power-end brushes 7 are arranged on the mover or the car through first insulators 9, and the load-end brushes 4 are arranged on the mover or the car through second insulators 5. In order to clearly express the connection relationship, only the connection lines between the lowest group A, B, C of load-end brushes and the output end 82 of the drive controller are shown in fig. 2, and the other two groups of load-end brushes are also connected to the output end 82 of the drive controller in parallel, which is not repeated. 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, the power supply end sliding contact rail 6 can be theoretically reduced to be a single (positive) direct current sliding contact rail, and the other (negative) is realized by a guide wheel or a sliding block or a special electric brush contacting the guide rail or the frame, and the guide rail or the frame needs to be grounded. However, the power supply effect and reliability of the latter (single rail) may be inferior to the former (double rail), and the problems of related processes and power supply safety need to be solved, and the latter is adopted with caution.
In some cases, the power bus is single-phase ac, such as a common single-phase 220 v lighting power, the power-end trolley rail 6 is a single-phase (two in number) ac trolley rail, and the input end 81 of the driving controller is single-phase ac.
In some cases, the power bus is two-phase ac, the power-end sliding contact rail 6 is a two-phase ac sliding contact rail, and the input end 81 of the driving controller is two-phase ac.
In some cases, the power bus may also be three-phase ac, the power-end sliding contact rail 6 is a three-phase ac sliding contact rail, and the input end 81 of the driving controller is a three-phase ac.
In general, N power buses and N power end sliding contact rails are reduced to N-1 sliding contact rails theoretically, and in addition, the reduced sliding contact rails are realized by means of guide wheels or sliding blocks or special brushes contacting the guide rails or the machine frame and the like, and the guide rails or the machine frame generally need to be grounded. However, the latter (N-1 root) has inferior power supply effect and reliability as the former (N root), and needs to solve a series of process and safety problems and be adopted with caution.
In some cases, the output end 82 of the driving controller is direct current, the sliding contact rail 3 at the load end is a direct current sliding contact rail, and the unit motor is a direct current motor.
In some cases, the output end 82 of the driving controller is two-phase alternating current, the sliding contact rail 3 at the load end is a two-phase alternating current sliding contact rail, and the unit motor is a two-phase alternating current motor.
In some cases, the output end 82 of the driving controller may be four-phase, five-phase, six-phase and other multiphase ac (or dc) power, the intermittent sliding contact rail 3 at the load end is a corresponding four-phase, five-phase, six-phase and other multiphase ac (or dc) sliding contact rail, and the unit motor is a corresponding four-phase, five-phase, six-phase and other multiphase ac motor.
In general, the output 82 of the driving controller is an N-phase ac, the intermittent trolley rail 3 of the load end is an N-phase ac trolley rail, and the unit motor is an N-phase ac motor.
The invention adopts the technical proposal, which has the following beneficial effects:
the dual-port contact/non-contact power supply scheme of the primary segmented linear motor vehicle-mounted driving controller has the characteristics of simple structure, mature technology, safety, reliability, economy, applicability, high efficiency and energy conservation.
The driving controller and the power end brushes and the load end brushes thereof are positioned on the rotor or the car, the input end and the output end of the driving controller are respectively connected with the power end sliding contact rail and the load end intermittent sliding contact rail on the transportation rail through the power end brushes and the load end brushes, the primary windings of the unit motors on the rail are respectively connected with conductor segments in the corresponding load end intermittent sliding contact rail, the accurate and reliable sectional power supply of the primary windings of the unit motors and the accurate control of the spacing between the front car and the rear car are realized, the primary windings of the unit motors arranged along the transportation rail are electrified for a short time to allow the volume of the linear motor with high current density to be greatly reduced, the volume of a secondary (permanent magnet) serving as the rotor is small, the dead weight is light, the vertical lifting effective load is large, the protection of the secondary permanent magnet is simple, the maintenance of the system is convenient, the primary coil intermittent sliding contact sectional power supply and the rotor continuous sliding contact power supply principle is feasible, the technology is mature, the number of the driving controller such as a vehicle-mounted frequency converter (inverter) and the auxiliary sensor and the cable is minimum, the whole system is paved on the rail only with the unit motor module, the power end sliding contact rail and the load end sliding contact rail and the current sensor and the necessary for the monitoring system are paved on the whole system (the current converter and the current converter is low in cost and the current-variable-level and the whole system is still has the structure of the current-controlled by the current and the dead weight of the current-weight is low-level and the current controller is compared with the primary coil and the car and has the active load and has the structure is low and has the active and has low cost. 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 likely to be larger than that of a conventional moving-magnet structure (due to the fact that a large number of costs of a driving control system, sensors, cables, a sectionalized switching device, electricity consumption, maintenance fees and the like are saved, the cost is only slightly increased by about 5-10% of motor lifting force, and the influence of slightly reduced effective load caused by the self-quantity of a driving controller and an electric brush which are increased in the scheme compared with that of the conventional moving-magnet structure can be completely compensated), and the reliability and the lifting efficiency of the system are greatly increased.
The invention adopts the technical mature single-contact sliding contact power supply scheme at the input end and the output end of the linear motor rotor side driving controller, the power end brush and the load end brush are respectively and electrically connected with the input end and the output end of the driving controller, and then respectively contact and move on the power end sliding contact rail and the load end intermittent sliding contact rail, so that the linear motor rotor side driving controller is common single-contact sliding contact power supply, has reliable operation, small sliding contact resistance, low high-frequency hybrid consumption, contact arc, energy consumption, electromagnetic compatibility and the like, and is within an acceptable range and the current standard, in addition, along with the rapid progress and the more practical use of a wireless power supply technology, the input or output adopts the wireless power supply technology to enable engineering application and operation maintenance to be simpler and easier and more feasible, be more advantageous and accord with the advanced technical characteristics of a new era, and has a series of advantages of the traditional moving coil scheme in theory, such as the driving controller is positioned at the rotor car side, a control system and power supply are simple, the control is accurate, and the like, and the moving magnetic scheme has a series of advantages such as the stator primary winding is allowed to be electrified in a short time, the linear motor with high current density, the linear motor is light, the secondary is protected, the active and the system is convenient, and the protection system is simple and convenient.
In summary, whether the principle topological structure is the principle topological structure or the implementation effect, the invention is obviously different from the prior art, the conventional thinking of the prior art is overturned, a series of defects of a moving-magnet type and moving-coil type structure in the background art are completely abandoned, a brand new topological structure scheme capable of achieving two best theory is provided from the angles of moving-magnet type to moving-coil type, input end to output end of a driving controller, contact power supply to non-contact (wireless) power supply, system and global, the motor arrangement mode of a main driving unit is a moving-magnet type (preferred) structure, the motor arrangement mode of the driving controller is a moving-coil type (preferred) structure, the technical key between the two-port contact/non-contact power supply technology suitable for the primary sectional linear motor/vehicle-mounted driving controller structure is a series of advantages of the moving-magnet type structure and the moving-coil type structure, the key technical and engineering application problems of key application fields of the old key and key application projects in the principle scheme are solved, and the key technical scheme and engineering application problems of the key technical scheme and the engineering application are possible to become the economic reasonable and preferred principle motor structure scheme of the structure of the motor structure in the certain application fields, and the key technical scheme and engineering application scheme and the key technical scheme. Therefore, the linear motor system can be completely and smoothly applied to a direct-driven elevator or lifting system, a subway or magnetic levitation (inter-city) train, a logistics storage (stereo garage) transportation system, a meshed automatic conveying line and the like.
It is to be understood that while the spirit and principles of the invention have been described in connection with several embodiments, it is to be understood that this invention is not limited to the specific embodiments disclosed nor does it imply that the features of these aspects are not combinable and that such is for convenience of description only. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (1)
1. A linear motor transportation system is characterized in that the system comprises,
A stator including a plurality of sequentially arranged stator units having primary windings;
At least one mover;
At least one driving controller which is arranged on the rotor or the attachment of the rotor and is used for controlling the motion of the rotor;
the first wireless transmission power supply system is used for supplying power to the linear motor transportation system, the first wireless transmission power supply system is arranged along a transportation track or surrounding space formed by the stator units, and the driving controller receives electric energy input provided by the first wireless transmission power supply system through wireless transmission;
the second sliding contact rail is an electric conductor and comprises a plurality of second sliding contact rail units which are sequentially distributed, the distribution of the second sliding contact rail units corresponds to the distribution of the stator units, and
Each second sliding contact rail unit is electrically connected with the corresponding primary winding of the stator unit;
At least one second brush provided on the mover or the attachment of the mover, and at the same time,
The second electric brush is matched with the second sliding contact rail, and moves on the second sliding contact rail unit in a contact way along with the movement of the mover, and/or moves among a plurality of second sliding contact rail units in a continuous contact way,
The second electric brush is electrically connected with the driving output end of the driving controller,
The primary winding of the stator unit is one of single phase or multi-phase,
When the primary winding is more than two phases, the second sliding contact rail comprises a plurality of second sliding contact rail units, each second sliding contact rail is electrically connected with one phase winding in the primary winding of the stator unit, the second sliding contact rail comprises a plurality of second sliding contact rail units,
The second brushes comprise a plurality of second sub brushes, and each second sub brush is contacted with one second sub sliding contact rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111504728.4A CN114123706B (en) | 2020-07-22 | Linear motor transportation system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010711011.6A CN111711337B (en) | 2020-07-22 | 2020-07-22 | Linear motor and transportation system |
| CN202111504728.4A CN114123706B (en) | 2020-07-22 | Linear motor transportation system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010711011.6A Division CN111711337B (en) | 2020-07-22 | 2020-07-22 | Linear motor and transportation system |
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| Publication Number | Publication Date |
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| CN114123706A CN114123706A (en) | 2022-03-01 |
| CN114123706B true CN114123706B (en) | 2024-07-16 |
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| CN103779971A (en) * | 2014-01-29 | 2014-05-07 | 中国科学院电工研究所 | Movable type non-contact power supply system in which subsection power supply is adopted |
| CN105305730A (en) * | 2015-11-06 | 2016-02-03 | 河南理工大学 | Sliding contact type sectional power supply switching apparatus for linear motor |
| CN109458397A (en) * | 2018-12-28 | 2019-03-12 | 广州智驱科技有限公司 | A kind of linear moving module unit block of wireless control |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103779971A (en) * | 2014-01-29 | 2014-05-07 | 中国科学院电工研究所 | Movable type non-contact power supply system in which subsection power supply is adopted |
| CN105305730A (en) * | 2015-11-06 | 2016-02-03 | 河南理工大学 | Sliding contact type sectional power supply switching apparatus for linear motor |
| CN109458397A (en) * | 2018-12-28 | 2019-03-12 | 广州智驱科技有限公司 | A kind of linear moving module unit block of wireless control |
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