Elevator with linear motor
11524875 · 2022-12-13
Assignee
Inventors
- Tero Purosto (Helsinki, FI)
- Tero Hakala (Helsinki, FI)
- Jouni Ratia (Helsinki, FI)
- Ilya Petrov (Helsinki, FI)
Cpc classification
B66B13/00
PERFORMING OPERATIONS; TRANSPORTING
B66B7/044
PERFORMING OPERATIONS; TRANSPORTING
B66B11/0407
PERFORMING OPERATIONS; TRANSPORTING
B66B9/003
PERFORMING OPERATIONS; TRANSPORTING
International classification
B66B11/04
PERFORMING OPERATIONS; TRANSPORTING
B66B7/04
PERFORMING OPERATIONS; TRANSPORTING
B66B9/00
PERFORMING OPERATIONS; TRANSPORTING
H02K37/00
ELECTRICITY
Abstract
An elevator includes at least one elevator shaft and at least one elevator car traveling in the elevator shaft. The elevator has at least one elevator motor including at least one linear stator located vertically along the elevator shaft and at least one mover located in connection with the elevator car and co-acting with the stator. The elevator includes a vertical stator beam supporting at least one stator, which stator beam has at least one side face carrying ferromagnetic poles of said stator spaced apart by a pitch. The mover includes at least one counter-face facing the side face(s) of the stator beam, in which electro-magnetic components of the mover are located.
Claims
1. An elevator, comprising: at least one elevator shaft; at least one elevator car traveling in said at least one elevator shaft; at least one elevator motor comprising at least one linear stator located vertically along the at least one elevator shaft and at least one mover located in connection with the at least one elevator car and co-acting with the at least one linear stator; and a vertical stator beam supporting the at least one linear stator, the vertical stator beam having four side faces carrying ferromagnetic poles of the at least one linear stator spaced apart by a pitch, wherein the at least one mover comprises counter-faces facing said four side faces of the vertical stator beam, electro-magnetic components of the at least one mover being located in said counter-faces, wherein the at least one mover includes at least two arms corresponding to the four side faces of the vertical stator beam, and each arm has a counter-face carrying counter-face electro-magnetic components that face and co-act with the corresponding ferromagnetic poles of the corresponding side faces, wherein the at least one elevator motor is a flux-switching permanent magnet motor (FSPM), wherein at least two side faces of the four side faces are provided with stator poles having the same pitch and the vertical position of the stator poles of both side faces is mutually offset, and wherein the four side faces of the vertical stator beam have the same pitch, and the pitch of the opposite side faces is identical whereas the pitch of the side faces extending in right angles is offset in a vertical direction.
2. The elevator according to claim 1, wherein the at least one stator and the at least one mover form a guide for the travel of the at least one elevator car in the at least one elevator shaft.
3. The elevator according to claim 2, wherein ferromagnetic stator poles of the stator beam and the electro-magnetic components of the at least one mover form a magnetic bearing for the guide and suspension of the at least one elevator car.
4. The elevator according to claim 1, wherein the at least one mover has separate magnetic bearing coils which are controlled independent of electro-magnetic mover components of the linear motor, which are controlled to regulate an air gap of the linear motor, which separate magnetic bearing coils co-act with the at least one linear stator.
5. The elevator according to claim 1, wherein the stator beam comprises a vertical support structure for at least two stators and at least one fastening element to fix the support structure to the at least one elevator shaft.
6. The elevator according to claim 5, wherein the at least one mover has a vertically extending C-profile or U-Profile surrounding the stator beam.
7. The elevator according to claim 6, wherein the at least one mover has four counter-faces arranged in a rectangular configuration and facing the four side faces of the stator beam, wherein each of the counter-faces comprises the electro-magnetic components of the at least one mover and the opening in the C-profile is configured to accommodate (the) fastening element of the stator beam.
8. The elevator according to claim 1, wherein the cross section of the stator beam is rectangular.
9. The elevator according to claim 1, wherein at least two elevator cars are configured to travel within one elevator shaft.
10. The elevator according to claim 1, having at least two elevator shafts located side by side and being connected at least at their top and/or bottom ends by a horizontal passage, whereby the two elevator shafts are configured to accommodate more than two elevator cars traveling therein.
11. The elevator according to claim 10, wherein in the horizontal passage(s) a horizontal moving mechanism is provided for moving the at least one elevator car in horizontal direction between the at least two elevator shafts.
12. The elevator according to claim 11, wherein the horizontal moving mechanism comprises a horizontal moving means mounted in connection with the at least one elevator car, comprising rollers, whereby at least one of the rollers is driven, and which horizontal moving mechanism comprises at least one horizontal guide track(s) located in the horizontal passage and extending into the at least two elevator shafts on both sides of the horizontal passage.
13. The elevator according to claim 10, wherein the at least two elevator shafts and their upper and lower horizontal passages form a closed traveling path.
14. The elevator according to claim 10, wherein landing doors of the elevator are located in horizontal passages between the at least two elevator shafts.
15. The elevator according to claim 10, wherein the two elevator cars are rucksack suspended with guide rails and stator beams located on shaft sides which are opposite to the horizontal passages.
16. The elevator according to claim 10, wherein the at least one mover is in a direction of the horizontal passages releasable from the stator beam.
17. The elevator according to claim 10, wherein at least a part of the guide rollers of the at least one elevator car is releasable from a corresponding guide rail.
18. The elevator according to claim 10, wherein a busbar with vertical conductor rails is located along the length of the at least one elevator shaft, and the at least one elevator car has at least one contactor connecting the conductor rails.
19. The elevator according to claim 10, wherein the at least one elevator car has a wireless connection to a elevator control.
20. The elevator according to claim 10, wherein the at least one elevator car has a power source, which is configured as back-up power source for the at least one mover.
21. The elevator according to claim 1, being a high rise elevator with a vertical length of more than 50 m.
22. The elevator according to claim 1, wherein the at least one elevator car has at least two movers located above each other and spaced apart in an upper and lower half of the at least one elevator car.
23. The elevator according to claim 1, wherein the ferromagnetic poles are teeth provided on a side face of a ferromagnetic stator rod, the teeth being spaced apart by teeth gaps.
24. The elevator according to claim 1, wherein the at least one linear stator does not have any permanent magnets and does not have any windings.
25. An elevator, comprising: at least one elevator shaft; at least one elevator car traveling in said at least one elevator shaft; at least one elevator motor comprising at least one linear stator located vertically along the at least one elevator shaft and at least one mover located in connection with the at least one elevator car and co-acting with the at least one linear stator; and a vertical stator beam supporting the at least one linear stator, the vertical stator beam having at least one side face carrying ferromagnetic poles of the at least one linear stator spaced apart by a pitch, wherein the at least one mover comprises at least one counter-face facing said at least one side face of the vertical stator beam, electro-magnetic components of the at least one mover being located in said at least one counter-face, wherein the vertical stator beam includes at least two side faces each carrying ferromagnetic poles, the mover includes at least two arms corresponding to the two side faces of the vertical stator beam, and each arm has a counter-face carrying counter-face electro-magnetic components that face and co-act with the corresponding ferromagnetic poles of the corresponding side face, wherein the elevator includes at least two of said elevator shaft located side by side and being connected at least at their top and/or bottom ends by a horizontal passage, the two elevator shafts being configured to accommodate more than two elevator cars traveling therein, wherein in the horizontal passage(s) a horizontal moving mechanism is provided for moving the at least one elevator car in horizontal direction between the at least two elevator shafts, and wherein the horizontal moving mechanism comprises a horizontal moving means mounted in connection with the at least one elevator car, comprising rollers, whereby at least one of the rollers is driven, and which horizontal moving mechanism comprises at least one horizontal guide track(s) located in the horizontal passage and extending into the at least two elevator shafts on both sides of the horizontal passage, wherein the rollers are movable from a retracted position into a drive position, wherein the rollers co-act with the at least one guide track.
26. An elevator, comprising: at least one elevator shaft; at least one elevator car traveling in said at least one elevator shaft; at least one elevator motor comprising at least one linear stator located vertically along the at least one elevator shaft and at least one mover located in connection with the at least one elevator car and co-acting with the at least one linear stator; and a vertical stator beam supporting the at least one linear stator, the vertical stator beam having at least one side face carrying ferromagnetic poles of the at least one linear stator spaced apart by a pitch, wherein the at least one mover comprises at least one counter-face facing said at least one side face of the vertical stator beam, electro-magnetic components of the at least one mover being located in said at least one counter-face, wherein the vertial stator beam includes at least two side faces each carrying ferromagnetic poles, the mover includes at least two arms corresponding to the two side faces of the vertical stator beam, and each arm has a counter-face carrying counter-face electro-magnetic components that face and co-act with the corresponding ferromagnetic poles of the corresponding side faces, wherein the at least one elevator motor is a flux-switching permanent magnet motor (FSPM), and wherein at least two parallel stator beams are located in the at least one elevator shaft and the at least one elevator car has at least two movers located parallel to each other and in a horizontal distance of at least a half of the car width, each of which co-acting with one of the stator beams.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention is now described hereinafter with respect to the enclosed drawing. In this drawing
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
DESCRIPTION OF THE PREFERRED EMBODIMENTS
(11) It is emphasized that identical parts or parts with the same functionality are designated by the same reference numbers in all figures.
(12)
(13) The elevator car 16 comprises two movers 24, 26 located one above the other. The lower mover 24 is located in the lower half of the elevator car whereas the upper mover 26 is located in the upper half of the elevator car. These two movers 24, 26 comprise electro-magnetic components as e.g. irons, windings and permanent magnets 70, 71, 72, 74, 76 (
(14) Of course, the elevator car has a corresponding set of two movers 24, 26 for each vertical stator beam 18 so that the elevator car 16 has in total four movers, two lower movers 24 and two upper movers 26 to co-act with two stator beams 18.
(15) Of course, each stator beam 18 may have one or several stators 50 as it is shown in
(16) Although it is preferred that the stator beams 18 and movers 24, 26 of the elevator 10 of
(17) According to
(18) The stator rods 50 on all four side faces 42, 44, 46, 48 have the same pitch d. Anyway, the first and third side face 42, 46 of the stator beam also have an identical teeth position in vertical direction whereas the second and fourth side face 44, 48 have the same pitch but the teeth position is vertically offset with respect to the stator teeth 52 on the first and third side face 42, 46 by a ¼ pitch.
(19) Via this arrangement, it is ensured that on one hand, the horizontal forces between the stators 50 on opposite sides eliminate each other whereas the vertical offset of the pitches of the side faces oriented rectangular leads to a better efficiency and a smoother run of the elevator motor, as a moving step of such a motor 14 is a half pitch. By the fact that four stators 50 are located within the stator beam 18 the force generated between the movers 24, 26 and the stator beam 18 is multiplied by four, thereby achieving less horizontal ripples and a smoother movement of the movers 24, 26 with respect to the vertical stator beam 18.
(20)
(21) The mover 24, 26 comprises on each counter-face 54 a succession of two mover irons 70, 72 between which one thin magnet 71 is located. This package of mover irons 70, 72 and magnet 71 is followed by two windings 74, 76 which are controlled as to produce a magnetic field with opposite direction. This succession 70, 71, 72, 74, 76 of mover irons, permanent magnets and windings is repeated according to the length of the mover. The movement of the mover 24, 26 with respect to the stator rod is accomplished by controlling the both windings 74, 76 to switch the flux direction to the opposite so that with each switching, the mover 24, 26 moves half of the pitch d of the stator teeth 52. Thus, the mover 24, 26 can be controlled to move according to the arrows in upwards or downwards direction with respect to the stator rod 50.
(22)
(23) In both elevator shafts 102, 104, vertical stator beams 18, 114 e.g. according to one of the previous embodiments, or according to
(24) Both elevator shafts are cut out along the cutting line 112 for clarity reasons, as normally this concept is preferably designed for high-rise elevators having 20 floors or more. Accordingly, the two shafts 102, 104 are able to accommodate a much larger number of elevator cars than the four cars 16a-16d shown in the figure. Each car 16a-16d is able to move largely independent of the others within the two shafts 102, 104 except the fact that collisions between cars have to be avoided. By the fact that in the first elevator shaft 102 the elevator cars 16a-16d only drive downwards and in the second elevator shaft 104 only drive upwards, the probability of mutual affection is decreased. Furthermore, by this circular moving scheme, the transport capacity of both shafts is drastically increased on one hand because now the two elevator shafts may comprise much more elevator cars than in conventional systems and on the other hand, because in each elevator shaft, all elevator cars only move in the same direction, avoiding counter-movements of cars which reduce an economic shaft use and necessitate extensive anti-collision control.
(25)
(26) The vertical stator beam 114 comprises five side faces 116, 118, 120, 122, 124. The first side face 116 directed to the elevator car 16a-16d as well as the fourth and fifth side face 122, 124 directed to the shaft wall 22 are guide faces co-acting with guide rollers of a car guide 140 as shown in
(27) The vertical stator beam 114 of
(28)
(29) The moving pattern of the elevator cars in the elevator car 200 corresponds to that of
(30) The function of the horizontal moving mechanism 205 based on the interaction between the horizontal guide tracks 206 and the horizontal moving means 210 of the elevator car 16a-16d is described in more detail with respect to
(31) It is further clear for the skilled person that the retracted and operational position of the support roller 212 is controlled in synchronization with the initiation and releasing of the contact between the movers 126 and the corresponding vertical stator beams 114. Via this arrangement, it is ensured that the car is always supported in vertical direction either by the force of the mover 126 on the vertical stator beam 114 or by the support of the support rollers 212 on the horizontal guide tracks 206.
(32) It is not shown in the figures but is evident for the skilled person that the elevator car has a gripping device which grips the guide faces of guide rails or of the vertical stator beams 114 when the power of the power source 218 (and eventually in case of a power failure of the mains) goes off thus ensuring that the car cannot fall downwards when the movers are not energized any longer. When a failure of the power source should occur while the car is supported via the support rollers 212 on the horizontal guide tracks 206, nothing can happen as the operation position of the support rollers 212 on the horizontal guide tracks 206 is locked even in case of power off.
(33) Accordingly, also in this new multi-shaft multi-car arrangement of the invention, the safety of the elevator cars 16a-16d is always ensured independent whether the car is currently supported by the movers 126 and the vertical stator beams 114 or by the support rollers 212 on the horizontal guide tracks 206.
(34) The invention can be carried out within the scope of the appended patent claims. Thus, the above-mentioned embodiments should not be understood as delimiting the invention.
LIST OF REFERENCE NUMBERS
(35) 10 elevator
(36) 12 elevator shaft
(37) 14 elevator motor
(38) 16 elevator car
(39) 18 stator beam
(40) 20 fastening elements
(41) 22 shaft wall/shaft side
(42) 24 lower mover
(43) 26 upper mover
(44) 28 first guide rail
(45) 30 second guide rail
(46) 32 first car guide
(47) 34 second car guide
(48) 40 support structure
(49) 42 first side face
(50) 44 second side face
(51) 46 third side face
(52) 48 fourth side face
(53) 50 stator/stator rod
(54) 52 stator teeth
(55) 53 teeth gaps
(56) 54 counter face of mover
(57) 56 first arm of C-profile mover
(58) 58 second arm of C-profile mover
(59) 60 third arm of C-profile mover
(60) 62 fourth arm of C-profile mover
(61) 70 first mover iron
(62) 71 permanent magnet
(63) 72 second mover iron
(64) 74 first winding
(65) 76 second winding
(66) 100 elevator (second embodiment)
(67) 102 first elevator shaft
(68) 104 second elevator shaft
(69) 106 upper horizontal passage
(70) 108 lower horizontal passage
(71) 110 landing door
(72) 114 stator beam (second embodiment)
(73) 116 first side face (first guide face)
(74) 118 second side face
(75) 120 third side face
(76) 122 fourth side face (second guide face)
(77) 124 fifth side face (third guide face)
(78) 126 mover (second embodiment)
(79) 128 mounting element
(80) 130 bus bar
(81) 132 connector rails
(82) 134 contactor
(83) 136 spring support
(84) 140 car guide (second embodiment)
(85) 142 first guide roller, at the car side
(86) 144 second guide roller, at the shaft wall side
(87) 146 third guide roller, at the shaft wall side
(88) 148 pivot arm
(89) 150 pivoting mechanism
(90) 200 elevator (third embodiment)
(91) 202 first elevator shaft
(92) 204 second elevator shaft
(93) 205 horizontal moving mechanism
(94) 206 horizontal guide track
(95) 208 horizontal passage
(96) 210 horizontal moving means mounted to the elevator car
(97) 212 support roller
(98) 214 car control
(99) 216 wireless transmission means
(100) 218 power supply
(101) 220 roller arrangement
(102) 222 mounting base
(103) 224 support arm
(104) 226 drive member