MXPA99007682A - Adjustable magnetic coupler - Google Patents

Abstract

An adjustable coupler has a group of magnet rotors with permanent magnets separated by air gaps from non-ferrous conductor elements presented by a group of conductor rotors. The air gaps are adjusted by axial movement of one of the groups relative to the other to vary the slip of the coupler and control the load speed under varying load conditions.

Description

ADJUSTABLE MAGNETIC COUPLER TECHNICAL FIELD The present invention relates to permanent magnetic couplers of the type having a magnet rotor on the arrow separated by an air space from a conducting rotor on another arrow, the conducting rotor having an electrically conductive element reinforced with iron located opposite to the magnets presented by the magnet rotor. More particularly, the invention relates to the adjustment of the air space. BACKGROUND OF THE INVENTION Induction motors are used, for example, for drive fans, blowers, pumps and compressors. It has been recognized that when these engines operate at full speed, they usually have excessive capacity compared to the load requirements and this excessive capacity is compounded when the load is variable. It has also been recognized that if the output of the motors could be adjusted to provide only the necessary power, it would result in a significant reduction in the use of energy. Therefore, variable speed drives (IVV) have been developed in the form of electronic devices that match the speed of the motor to that required for a given application. A normal IVV rectifies the input AC voltage and current in DC, then inverts the DC back to AC at a different voltage and frequency. The voltage and frequency of output are They are determined by current energy needs and are automatically set by a control system or by an operator. Therefore, IVVs have generally been expensive since they have not been used extensively for energy savings. It has been reported that IVVs require the capability of highly trained maintenance personnel and short engine life. SUMMARY OF THE INVENTION The present invention helps to provide a mechanical alternative to IVV that are far more economical, will automatically maintain the speed of the load at a pre-set speed as the load requirements vary and will not require modification of the electric motor or the adjustment of the input voltage or frequency. An additional objective is to provide a permanent magnet coupling that will work in place of the IVV without overheating. In my prior Patent 5,477,094, a magnetic coupler is shown in which a magnet rotor unit is mounted by two conductive rotors which are connected together to rotate as a driving rotor unit on the shaft while the magnet rotor unit is rotated. ride to turn on a second arrow. The magnet rotor unit has a set of permanent magnets arranged with their opposite poles separated by air spaces from the electroconducting rings with ferrous reinforcements mounted on the respective conducting rotors. The rotation of one of the two arrows results in the rotation of the other arrow by the magnetic action without there being any direct mechanical connection between the arrows. My earlier patent also describes the concept of having two magnet rotors instead of a single magnet rotor unit, each magnet rotor having a respective set of permanent magnets separated by an air space of one of the electroconductive elements presented by the magnets. rotors drivers. The two magnet rotors are axially movable in relation to each other and are spring-loaded to separate. By the present invention, the magnet rotors are possibly positioned in relation to each other so that their axial positions vary automatically, they vary from a remote control location to provide adjustment of the air space with variable torque from an engine. of constant speed to a variable torque load operating at a lower speed maintained constantly. Instead of driving the spring the two magnet rotors as discussed above, according to the present invention, the position of the magnet rotors are controlled from a stationary control mechanism that communicates with an adjustment mechanism that operates on the magnet rotors to move them selectively towards each other to expand the air spaces or to move them away to narrow the air spaces. The adjustment of the spaces varies the rotational slip between the magnet rotor units and the rotor rotor units for a load of torque given and therefore affects the speed of the load. For a torque load the air spaces can be adjusted to provide the torque at a current rotational speed differential below the engine speed. Assuming that the torque output of the motor at an established operating speed of the motor is adequate relative to the load, it has been found that, since the power output of the motor automatically adjusts to the power requirement of the load, there are substantial energy savings. Furthermore, by means of the present invention, the normal speed differential (slip) between the magnetic rotors and the conductive rotors does not result in overheating. The adjustment means of the present invention can have a shape, for example, in which one of the magnet rotors is moved axially, for example, by a reversible servo motor and the other magnet rotor is responsively moved axially one similar amount in response to a mechanism operating between the magnet rotors. This mechanism can include a central rotor member mounted on the output shaft and having arm swing units mounted slidably centrally on the central motor member and slidably mounted in relation to the magnet rotors at the ends of the arms of the arms. swing so that the magnet rotors move equally in the opposite axial directions whenever one of the magnet rotors moves axially. It is preferred that the rotors of The magnets are slidably mounted on bolts projecting from the central reinforcing member in parallel relation to the output shaft, but the magnet rotors can also be mounted slidably directly on the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a longitudinal sectional view of a first embodiment of the invention shown in a position of wide air space and taken as indicated by line 1-1 in Figure 5; Figure 2 is a perspective view of the first embodiment without the conductive rotors and showing the adjustment mechanism of the extended air space so that the magnet rotors are in the narrow air space position; Figure 3 is a plan view corresponding to Figure 2; Figure 4 is a plan view similar to Figure 3, but with the air gap adjustment mechanism retracted so that the magnet rotors are in a wide air gap position; Figure 5 is a cross-sectional view taken as indicated by line 4-4 in Figure 4; Figure 6 is an end view of the left magnet rotor as seen in the angle in the right part of Figure 1 and with the magnets removed; Figure 7 is a perspective view showing a related barrel and fork board mechanism; Figure 8 is a longitudinal sectional view of a second embodiment shown in a position of wide air space; and Figure 9 is a perspective view of one of the fan rings. DETAILED DESCRIPTION OF THE INVENTION Referring to the drawings, the coaxial input and output arrow 20-21 has mounted thereon a conductive rotor unit 22 and a pair of magnet rotors 24-25. The conductive rotor unit has two axially separated conductive rotors 26-27 having the respective conductive rings 28-29 facing each other and formed of a non-ferrous material with high electrical conductivity such as copper. These conductive rings 28-29 are mounted by screws on the respective reinforcing rings 32-33 which are preferably made of mild steel.

The driver rotor unit 22 also includes a rotor disk 34 mounted by the bolts 35, on a hub 36 and axially spaced from the driver rotor 28 by a ventilation space 37. The reinforcement rings 32-33 are connected together and to the disk 34 in axially separated relationship by sets of bolts. 38-38 'screwed into the spacer sleeves 39-39' located outward from the orbit of the magnet rotors 24-25. The conducting rotor 27 is separated from the exit arrow 21 by a space ring nut 40. The hub 36 is mounted on the output shaft 20 as well as by a wedge-type coupling to a key connection. Each of the magnet rotors 24-25 has a non-ferrous mounting disc 42 reinforced by a ferrous reinforcing disc 43, preferably of mild steel. The mounting discs 42 may be aluminum or a suitable non-magnetic mixed material, and each is formed with a group of equally spaced rectangular cuts 44 arranged in a circle and receiving a respective set of permanent magnets 46 seated against the disc of respective reinforcement 43. The adjacent magnets have their polarities inverted. The magnets 46 are separated by air spaces 48-48 'from the conductive rings 28-29 of the rotor unit of the conductor 22. Preferably, the disk 34 is formed with ventilation holes 47 to assist the circulation of air through of the ventilation space 37 and the air space 48 for cooling the conductive ring 29. The cooling air for the conductive ring 28 is free to enter the air space 48 from the vacuum space 40. The conductive rotors can also be provided with a fan ring mounted with a screw 49 (Figure 9) having multiple spatula elements 49a for increasing the air flow adjacent to the conductive rings 27, 28 for cooling. It should be understood that if additional ventilation is provided to cool the conductive ring 28 through the ventilation space 37 and / or ventilation openings 47 or ventilation spatulas 49a may not require all applications in which case the reinforcing ring 32 could be mounted on the disc 34 or the conductive ring 28 could also be mounted on the disc 34 which could then serve as the ferrous reinforcement for the conductive ring 28 instead of the reinforcing ring 32. According to the present invention, the magnet rotors 24-25 are mounted so that they rotate at the same time with the output shaft 21 and also they move axially in relation to one another in the opposite axial directions for the adjustment of the air spaces 48-48 '. For this purpose, the magnet rotors 24-25 are preferably slidably mounted by the bushings 50 on the opposite axial end portions of the combination holder and guide pins 1. These pins project in opposite axial directions from a fifth rotor 52 which is mounted on the exit arrow 21 halfway between the conductive rings 28-29. As an alternative arrangement, the magnet rotors 24-25 could be slidably mounted on the output shaft 21 instead of on the pins 51. The push-pull means is provided to move the magnet rotors 24-15 axially at the same time as the rotors. length of the rotating shafts of the fluted outlet arrow 21 in opposite directions to vary the width of the air spaces 48-48 '. The push-pull means may comprise a first push-pull mechanism extending through the opening 40 for moving axially the magnet rotor 25 and a second push-pull mechanism extending between the magnet rotors to move the magnet rotor 24 which responds to the movement of the magnet rotor 25 by the first mechanism. In the illustrated embodiment the second mechanism includes the fifth rotor 52 and the related pins 51. The fifth rotor 52 can generally have a square shape in elevation providing four faces of end edges 52a, each of which has a central ear 53 projecting radially. from it. These ears 53 are formed with threaded radial holes extending towards the arrow 21 from their outer ends to receive the shoulder bolts 54 on which bearings 55 are jacketed. The bearings 55 receive the central hub positions 55 of the swing units 56 each having a pair of swing arms with the cam grooves 57 formed adjacent their outer ends. These cam grooves each receive a cam follower roller 58 for guiding therein. Each roller 58 projects outward from a mounting pulley 59 which is secured in a respective block 60 projecting towards the fifth rotor 52 from the mounting disk 42 of the respective magnet rotor. The blocks 60 can be mounted on the discs 42 by a pair of layer screws 60a. When the magnet rotors retract the maximum axial distance of the rotors 26-27 as shown in Figure 1, a respective pair of blocks 61 is extends on its opposite sides of each of the ears 53 of the fifth rotor 52 so that the removal units 56 co-planar with the fifth rotor 52 as shown in Figure 4-5. This compact arrangement helps to minimize the length of the coupler. With the grooved oscillating arm described and the follower roller arrangement, it is clear that when the magnetic rotor 25 moves away from the conducting rotor 27 to increase the width of the air space 48 ', the rocking units 56 are rotated in response to them. on the center bolts 54 so that their ends would swing towards the fifth rotor 52. During this rolling movement of rollers 58 they follow the grooves 57 towards their internal ends and as a result of the magnet rotor 24 is attracted towards the fifth rotor of magnet 52, thus increasing the width of the air space 48 to the same degree that the width of the air space 48 'is increased by pushing on the magnet rotor 25. Also, when the magnet rotor 25 is attracted towards the rotor of the conductor 27 to narrow the width of the air space 48 ', the swing units 56 will respond to the roll on the bolts 54 so that their ends will swing away from the fifth rotor 52, Thus, the magnet rotor 25 is pulled towards the rotor of the conductor 26 and narrows the air gap 48 corresponding to the narrowing of the air gap 48 '. The counterfacing magnet rotor 25 to vary the width of the air spaces 48-48 ', preferably is achieved using a cam barrel 51 having an inner barrel element 52 overlapped by an external barrel element 63. The inner member 62 is mounted by a bearing unit 64 on the outlet shaft 21 and the outer member 63 has a neck portion 63a that it has an empty space with the exit arrow 21 and carries a thrust bearing 65 having its external raceway at the inner radial end of the magnet rotor 25. A bearing layer 66 secured by the screws 67 to the magnet rotor disk 25 subject to the thrust bearing 65 and a seal 68 in its position. The inner barrel 62 has a set of rollers 70 projecting radially inwardly into the curved cam grooves 71 in the external barrel 63. The turning of the outer barrel 63 is prevented by a yoke 72 (Figure 7) having its arms 72a connected pivotally adjacent their outer ends by the rollers extending to the holes 73 in the outer barrel of the pulley 74 mounted on the yoke arms. The yolk 72 has a pair of lower limbs 72b formed with very large holes 75 receiving the cam rollers 76 mounted on studs projecting outward from a stationary mounting block 77. An actuator arm 78 projects outwardly from a inner barrel 62 and rotated in a suitable manner to control the air spaces 48, 48 '. Turning the inner barrel 62 by the action of the trigger in one direction causes the longitudinal movement of the outer barrel 63 which responds to the movement of the cam rollers 70 in the cam grooves 71 which are contoured to give this result. The holes 75 in the ends of the yoke 72b are sufficiently large in size relative to the rollers 76 to allow the required extreme movement of the outer barrel 63 as the yoke 72 swings in response to said movement. The longitudinal movement of the outer barrel 63 acts through the thrust bearing 65 to correspondingly push or pull the magnet rotor 25. As described above, this results in an equal longitudinal movement of the other magnet rotor 24 in the opposite direction responding to operation of the swing arm units 57 and the follower rollers 59. Therefore, the selective movement of the actuating arm 78 results in variation of the air spaces 48., 48 'and thus varies the output speed of the magnetic coupler. The actuator arm 78, for example, can be connected by a link 78a to an electric stationary rotary positioner that is controlled by a processor controller. For example, if the load is a pump whose flow output will be controlled, a measuring device in the output current feeds the output data to the process controller which then signals the rotary positioner for the required rotational movement of the actuator arm 78 for properly adjust the output speed of the magnetic coupler. Preferably, the exit arrow 21, instead of being the actual input arrow of the load, is an arrow section of addition as shown in Figure 1. This addition section 21 is connected to a neck-shaped end portion 21a to the fifth rotor 42 via a round end plate 80 covering the inner end face of the addition section 21 and a portion 52a of the fifth rotor 52. The sets 82, 83 of the bolts connected to the end plate 80 of the arrow 21 and the hub of the fifth rotor 52a. The arrow 21 expands from the neck portion 21a to an intermediate cylindrical portion that receives the bearing 64 and then is formed with an annular shoulder 21c against which the end of the internal groove of the bearing 64 sits. The longitudinal part of the shoulder 21c the exit shaft 21 has an outer cylindrical end portion 21d receiving a bearing seal 84 and a hub component 86a of the coupler 86. The coupler has a hub component of the complemental adapter 86b with a neck 86c dimensioned to receive the actual input arrow 21 'of the load. A compression type compression unit 87 is slid over the coupled neck 86c for the forced fit of the coupler 86 to the arrow 21 'which responds to the adjustment of the screws 89. The hub components 86a, 86b of the coupler 86 are secured together by the bolts 88 and the coupler is fixed to the arrow section 21 by an annular end plate 90 secured by the sets 91, 92 of the bolts to the outer end face of the arrow section and to the hub component 86a. A unit of compression 87 may also be used in conjunction with the hub 36 to secure it to the arrow 20. The described arrangement incorporating the arrow section 21 and the coupler 86 makes it easy to easily install or remove the magnetic coupling of the present invention without moving the load and its related output arrow 21 or the main transfer and its arrow 20. For some applications of the invention, there is a need to provide the required torque transfer from the input shaft 20 to the output shaft 21 using the rotors with a smaller diameter than is possible with simple pairs of magnet rotors and driver rotors. As shown in Figure 8, this need can be met by providing a second set of magnet rotors on the output shaft, extending the driver rotor unit in order to present the additional torque of the driver's rotors and connect one of the magnet rotors in one of the pairs with the corresponding magnet rotor of the other pair of magnet rotors by a push-pull rod passing freely through the fifth rotor and the rotor of the conductor which are located between the two magnet rotors coupled together by the rod. In the embodiment of Figure 8, the parts corresponding to the first described modality have been given the same reference numbers. The arrow section 21 has been enlarged and is designated 121. The pairs of magnet rotors have been marked 124- 125 and 224-225 and the corresponding fifth rotors have been marked 152 and 252. Separated by the air spaces from the magnet rotors 124 and 125 are rotors of the conductor 126-127 and separated by air spaces of the magnet rotors 224. and 225 are conductor rotors 226 and 227. The conductor rotors 126 and 127 have a soft steel ring 232 in common that functions as a reinforcement for the ring element for the conductor ring element 128 of the rotor of conductor 126 and also for the conductive ring element 229 of the conductor rotor 227. The conductor rings 129 and 228 are reinforced by iron rings 133 and 134, respectively. The latter are connected to the hub 136 mounted on arrow 20. The fourth rotors of the driver are properly clamped to the hub in relation to an arrangement of bolts 138 that pass through the tubular spacers 139-139 '. Two fifth rotors 152 and 252 are fixed on the arrow 121 so that they are half between the elements of the conductor 129, 132 and 228, 229. They have the same general configuration as the fifth rotor 52 and each has a set of four guide rods 51 supporting the respective pair of magnet rotors 124-125 and 224-225. In addition, the fifth ruler 142 has four free space openings 153 spaced halfway between its guide rods 51 for the free passage of the counter rods 300. These rods pass freely through the openings 153 'in the magnet rotor 124. At its inner end the push-pull rods are screwed into the magnet rotor 225 and at its outer end they pass through the magnet rotor 125 and maintained in fixed relation thereto by a pair of pressure rings 301. It will be apparent that the longitudinal movement of the magnet rotor 125 will be doubled by the magnet rotor 225 by means of the push-pull rods 300. This longitudinal movement is duplicated in the reverse direction by the magnet rotors 124 and 224 by means of the reaction of the balancing units 56 and the related parts as previously described. Although not preferred, the magnet rotors 124 and 224 can be coupled together by push-pull rollers instead of the magnet rotors 125 and 225 engaging together. From the foregoing it will be appreciated that, although the specific embodiments of the invention have been described herein for purposes of illustration, various modifications may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not limited except by the appended claims.

Claims (26)

1. CLAIMS 1. An adjustable magnet coupler comprises: first and second rotating arrows having a rotating shaft; two coaxial magnet rotors each containing a respective set of permanent magnets; two coaxial conductor rotors each having a non-ferrous electroconducting ring separated by an air gap from a respective one of the magnet assemblies; two first rotors being separated at a fixed axial distance and being mounted as a unit on the first arrow to rotate them at the same time; the two remaining rotors being mounted to move axially in opposite directions with respect to the second arrow and to rotate with them at the same time; a first push-pull mechanism connected to the first of the remaining rotors and to operate it axially in concentric relation with the second arrow; an additional push-pull mechanism carried by the second arrow between the remaining rotors and connected to it, the additional push-pull mechanism being operative to move a second of the remaining rotors at the same time for the first remaining rotor, but in the opposite direction to the axial trajectory, to vary equally the air spaces.
2. 2. An adjustable magnetic coupler according to claim 1, wherein one of the rotors in units is radially separated by an annular opening from the second arrow and the first push-pull mechanism extends through the opening towards the first of the rotors remaining from the control mechanism.
3. 3. An adjustable magnetic coupler according to claim 1, wherein both rotors in the unit are conductive rotors; and the remaining rotors are magnet rotors located between the driving rotors, and that the push-pull mechanisms are operative together to selectively move the magnet rotors axially at the same time in opposite directions a selected distance to vary the air spaces equally between the driver's rotors and the magnet rotors.
4. 4. An adjustable magnetic coupler according to claim 1, wherein the additional push-pull mechanism includes a fifth rotor fixed to the second arrow at a location between the remaining rotors and in which the rest of the additional push-pull mechanisms are They extend into the fifth rotor and the remaining rotors.
5. 5. An adjustable magnetic coupler according to claim 4, wherein the additional push-pull mechanism includes multiple sway units, each of which is mounted with central balancing on the fifth rotor and has its opposite ends internally slidably fitted with the respective remaining rotors.
6. 6. An adjustable magnetic coupler according to claim 4, wherein the remaining rotors are supported and slidably mounted on the projection pins of each axial end of the fifth rotor.
7. 7. An adjustable magnetic coupler according to claim 1, wherein a control mechanism is operatively associated with the first push-pull mechanism for operating the latter from a stationary position.
8. 8. An adjustable magnetic coupler according to claim 5, wherein the balancing units are coplanar with the fifth rotor when the air spaces have a maximum width and extend at angles transverse to the fifth rotor when the air spaces have a minimum width.
9. 9. An adjustable magnetic coupler according to claim 1, wherein the first push-pull mechanism comprises a first member mounted to move axially only and a second member held against axial movement and interconnected with the first member so as to move axially in response to rotation of the second member, the second arrow being free to rotate independently of the first push-pull mechanism.
10. 10. An adjustable magnetic coupler according to claim 9, wherein the interconnection between the first and second members comprises a cam groove in one of the members and a complementary cam roller mounted on the groove mounted on the other members.
11. An adjustable magnetic coupler according to claim 9, wherein the second member has a lever arm projecting therefrom and an actuator is connected to the lever arm to selectively swing it on an arc to selectively rotate the second arm. member to move axially in response to the first member and thus adjust the width of the air spaces.
12. 12. An adjustable magnetic coupler comprising: first and second rotating arrows having a rotating shaft; two coaxial magnet rotors each containing a respective set of permanent magnets; a group of two axially separated magnetic rotors each containing a respective set of magnets; a group of two axially separated conducting rotors each having a non-ferrous electroconducting ring separated by an air space from a respective one of the magnet assemblies; the distance between the rotors of one of the first of said groups being fixed, and each group being mounted on the first arrow to rotate at the same time with them; the rotors of the second group being in concentric relation with the second arrow to move axially relative to the other along the second arrow and to rotate with it at the same time; and push-pull means for axially moving a first rotor in the second group of rotors a selected distance in a selected axial direction and for axially moving the second rotor in the second group of rotors in an amount equal to the selected distance, but an axial direction opposite to the selected axial direction, so that the air spaces will vary in the same way.
13. A coupler according to claim 12, in which a fifth reactor is fixed to the second arrow at a location between the rotors of the second group of rotors and in which part of the push-pull means there is a mechanism carried by the fifth rotor.
14. A coupler according to claim 13, wherein the mechanism includes a balancing unit that is mounted to balance centrally on the fifth rotor and has its opposite ends slidably engaged with the two rotors in the second group of rotors.
15. 15. A coupler according to claim 13, wherein the second group of rotors is slidably mounted on the fifth rotor.
16. 16. A magnetic coupler according to claim 12, wherein the rotors of one of the groups are conductive rotors each having its electrically conductive ring coupled by the respective ferrous reinforcing member; and wherein the rotors of the second of said groups are magnet rotors, each having adjacent magnets of its set of permanent magnets arranged with their poles inverted, each assembly being mounted on a respective carrier disk including a respective ferrous reinforcement member coupled by the magnets of the set.
17. A magnetic coupler according to claim 12, wherein the push-pull means includes a first mechanism for selectively moving a first rotor in the second group axially a selected distance and selected direction and includes a second mechanism located between the rotors of the second group for moving the second rotor in the second group axially said selected distance in a direction opposite to the selected direction in response to movement to the first rotor in the second group by the first device.
18. 18. A magnetic coupler according to claim 16, wherein the second mechanism includes a fifth rotor mounted on the arrow between the rotors in the second group and includes swinging units each pivotally mounted centrally on the quito rotor and slidably engaging adjacent opposite ends with the rotors in the second group whereby the axial movement of the first rotor in the second group is transferred in a reverse direction in a amount similar to the second rotor in the second group.
19. An adjustable magnetic coupler according to claim 18, wherein the pivotal mounting of each balancing unit on the fifth rotor is on a respective pivot axis extending radially of the rotary axis of the second arrow so that each The balancing unit is coupled with the rotor units in the second group in places equidistant from the rotary axis of the second arrow.
20. 20. An adjustable magnetic coupler according to claim 18, wherein each swing unit has longitudinal grooves adjacent to its ends and the rotors in the second group have respective rollers that strike said grooves.
21. 21. An adjustable magnetic coupler according to claim 18, wherein the units each have a retracted position coplanar with the fifth rotor when the air spaces are at a maximum and have extended positions in which the spaces are more little ones.
22. 22. An adjustable magnetic coupler comprising: first and second arrows having coaxial rotary axes; a driver rotor unit mounted on the first arrow to rotate at the same time and provide first and second axially aligned groups of electroconductive elements, each group having two respective electroconductive elements facing each other and axially spaced apart; first and second groups of axially spaced magnet rotors, each group of magnet rotors having the magnet rotors and each magnet rotor containing a respective set of permanent magnets; each of the magnet rotors in the two groups of the magnet rotors being mounted in relation to the second arrow so that they can move axially relative to the other magnet rotors along the rotary axis of the second arrow and to turn at the same time with the second arrow; the first group of magnet rotors being located between the first group of electroconductive elements and having their sets of permanent magnets separated by a first pair of air spaces from the electroconductive elements in the first group of electroconductive elements; the second group of magnet rotors being located between the second group of electroconductive elements and having their sets of permanent magnets separated by a second pair of air spaces from the electroconductive elements in said second group of electroconductive elements; and an air space adjustment mechanism connected to the first and second group of magnet and operating rotors to axially move the respective magnet rotors in each of the groups in axial relation to one another a selected distance in opposite axial directions so the first and second pairs of air spaces vary equally.
23. An adjustable magnetic coupler according to claim 22, wherein the air gap adjusting mechanism includes: a first air space adjustment mechanism operatively associated with the first group of magnet rotors and operative to move them axially in relation to one another a selected distance in the axially opposite directions so that the first pair of air space can vary equally; and a second air gap adjusting mechanism interconnected by the first and second groups of magnet and operating rotors to axially move the second group of magnet rotors at the same time with the first group of magnet rotors so that the second pair of Air spaces can also be varied equally in response to the operation of the first air gap adjustment mechanism.
24. 24. An adjustable magnetic coupler according to claim 22, wherein the air phase adjusting mechanism includes: a first push-pull device for selectively axially moving a first magnet beam the first group of magnet rotors; a second push-pull device for moving the second magnet rotor in the first group of magnet rotors as opposed to the axial movement of the first push-pull device; a third push-pull device for moving a first magnet rotor in the second group at the same time with the first push-pull device; and a fourth push-pull device for moving the second magnet rotor in the second group of magnet rotors in opposition to the axial movement of the third push-pull device.
25. 25. An adjustable magnetic coupler according to claim 22, wherein the magnet rotors are slidably mounted on the rods projecting from the first and second additional rotors fixed to the second arrow between the magnet rotors in the first and second rotors. second groups of magnet rotors.
26. 26. An adjustable magnetic coupler according to claim 25, wherein the balancing units are mounted with center balancing on the additional rotors and have end portions that interact with the adjacent magnetic rotors so that the magnet rotors in each group of the magnet rotors is moved in the opposite axial directions.