JP4177189B2 - Rotating electric machine and pulley apparatus using the rotating electric machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating electric machine used for an electric motor of an elevator hoisting machine and a pulley apparatus using the rotating electric machine, and more specifically, a rotating electric machine having a plurality of drive motor units such as a twin or triple drive motor unit. This relates to the improvement of reliability and productivity.
[0002]
[Prior art]
A radial gap type motor used for an electric motor or the like of a general elevator hoisting machine may be configured with multiple poles in order to reduce the axial dimension. In this case, since the axial thickness of the motor is reduced, the degree of freedom in designing the radial dimension is improved.
[0003]
In order to increase the torque of the motor, the radial dimension of the stator and the rotor is set large in order to increase the circumferential dimension of the gap between the stator and the rotor. As a result, there is a problem that a useless space is generated on the inner diameter side of the motor.
[0004]
In order to solve this problem and effectively use the internal space of the motor, a twin drive motor in which a motor is further arranged on the inner diameter side of the motor is disclosed (for example, see Patent Document 1).
[0005]
In the motor of the twin drive configuration, a rotor having a magnet held on a yoke is disposed on the inner diameter side of the stator held on the inner wall surface of the frame in the motor section on the outer diameter side. On the outer diameter side of the stator held on the outer wall surface, a rotor having a magnet held on a yoke is disposed.
[0006]
[Patent Document 1]
JP 2002-369467 A (page 3-4, FIG. 1)
[0007]
[Problems to be solved by the invention]
In the motor of the conventional twin drive configuration as described above, the stator of the motor portion on the outer diameter side can be held on the frame by means such as shrinking, but the stator of the motor portion on the inner diameter side is resin-molded on the frame. It is necessary to hold it by means different from the grilled swallow.
[0008]
In the rotor of the inner diameter side motor part, the yoke has a function of holding the magnet against centrifugal force. However, in the rotor of the inner diameter side motor part, the yoke does not have a function of holding the magnet against centrifugal force. It is necessary to take measures such as providing a separate retaining ring.
[0009]
As described above, the stator holding mechanism and the magnet holding mechanism in the rotor are different between the outer diameter side motor section and the inner diameter side motor section.
[0010]
Further, the stator of the outer diameter side motor part and the stator of the inner diameter side motor part differ in the shape and dimensions of the slot part, so that the productivity is poor in that it is necessary to change the configuration of the winding machine. There's a problem.
[0011]
In addition, when the stator is held on the frame by a resin mold, there are cases where sufficient strength cannot be secured, and there is a problem that long-term reliability remains.
[0012]
An object of the present invention is to solve the above-described problems and to improve long-term reliability and productivity of a radial gap type rotating electrical machine having a plurality of drive motor units.
[0013]
[Means for Solving the Problems]
In the rotating electrical machine according to the present invention, a plurality of sets of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by a frame and protrudes in the radial direction. Teeth and a slot between the teeth, the rotor is a rotating electrical machine in which a magnetic pole portion is formed,
The rotor of each set of the motor units is arranged on the radially inner side of the stator.
[0014]
In addition, a plurality of sets of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by a frame and is disposed between the teeth protruding in the radial direction and the teeth. And the rotor is a rotating electrical machine in which a magnetic pole portion is formed,
The rotor of each set of the motor units is arranged on the radially outer side of the stator.
[0015]
The pulley drive device according to the present invention is obtained by connecting a pulley to a rotor in the rotating electrical machine according to the present invention.
[0016]
An elevator hoist apparatus according to the present invention uses the rotating electric machine of the present invention as an elevator hoist motor.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a radial gap type rotating electrical machine having a plurality of motor portions in the radial direction in which a cylindrical stator (stator) and a rotor (rotor) form a pair. In the following embodiments, a motor Although the case where three parts are provided will be described, the present invention can also be applied to a rotating electric machine having two or more motor parts.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing a first embodiment of a rotating electrical machine according to the present invention. As shown in the figure, the rotating electrical machine of the present embodiment includes a motor unit 1 including three radial gap type motor units, an A motor unit 1a, a B motor unit 1b, and a C motor unit 1c, and three inverter units. The drive unit 2 is composed of an A inverter 2a, a B inverter 2b, and a C inverter 2c.
[0018]
The A motor part 1a is composed of a rotor 5a and a stator 6a, the B motor part 1b is composed of a rotor 5b and a stator 6b, and the C motor part 1c is composed of a rotor 5c and a stator 6c.
[0019]
The rotor 5a has a permanent magnet 7a held by a cylindrical rotor yoke portion 11a, the rotor 5b has a permanent magnet 7b held by a cylindrical rotor yoke portion 11b, and the rotor 5c has a cylindrical rotor yoke portion 11c. The permanent magnet 7c is provided, and the rotor yoke portions 11a, 11b, and 11c are integrated with the rib 8. The rib 8 is connected to the rotating shaft 9, and the rotating shaft 9 rotates to rotate the rotors 5a, 5b, and 5c. Rotate. The permanent magnets 7a, 7b, 7c are fixed to the rotor yoke portions 11a, 11b, 11c by means such as an adhesive.
[0020]
The stator 6a is held by a cylindrical frame 10a, the stator 6b is held by a cylindrical frame 10b, and the stator 6c is held by a frame 10c. The frames 10a, 10b, and 10c are integrated by a rib 8. The stators 6a, 6b, 6c are fixed to the frames 10a, 10b, 10c by fitting.
[0021]
The rotors 5a, 5b, and 5c of the three motor units, the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c are all disposed inside the stators 6a, 6b, and 6c. It has a rotor type motor configuration.
[0022]
In this way, since all the motor parts are configured as an inner rotor type, the fixing method of the permanent magnets 7a, 7b, 7c and the fixing method of the stators 6a, 6b, 6c on the rotor side can be unified, and productivity is improved. improves.
[0023]
FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and is partially cut away. In the figure, the outermost A motor part 1a has 80 rotating magnetic poles (the number of permanent magnets, hereinafter referred to as the number of poles), the stator 6a has 90 slots (teeth), and the central B motor part 1b The number of poles is 64, the number of slots is 72, the number of poles of the innermost C motor unit 1c is 48, and the number of slots is 54. That is, the ratio of the number of poles to the number of slots is 8: 9 for all three motor units.
[0024]
The winding pattern in each motor section generally differs depending on the ratio between the number of poles and the number of slots. However, in this embodiment, the ratio between the number of poles and the number of slots in the three motor sections is the same. Can be the same. For example, an in-phase coil is wound around three adjacent teeth. That is, when viewed from the air gap side, when it is wound clockwise, it is represented by +, and when it is wound counterclockwise, it is represented by-. The U phase is wound, the V phase, the -V phase, and the V phase are sequentially wound around the three adjacent teeth, and the W phase, the -W phase, and the W phase are wound around the adjacent three teeth. Turn. The winding of each phase is arranged by periodically repeating the winding pattern of 9 teeth. In-phase coils wound around three adjacent teeth are connected in series.
[0025]
The ratio of the number of poles and the number of slots of each motor part are A motor part 1a: B motor part 1b: C motor part 1c = 5: 4: 3. Since the rotors of the three motor units are connected to the same rotating shaft 9, they rotate at the same rotational speed, but the driving frequency (basic frequency) at that time is also A motor unit 1a: B motor unit 1b: C motor. Part 1c = 5: 4: 3. At this time, a 1f component (a component that pulsates at a frequency that is one time that of the fundamental wave component), a 2f component (a component that pulsates at a frequency twice that of the fundamental wave component), and 6f, which are torque ripple components that are generally significantly generated in the motor The component (the component that pulsates at a frequency six times the fundamental wave component) is, for example, when the rotor makes one revolution per second,
In the A motor unit 1a, 1f = 40Hz, 2f = 80Hz, 6f = 240Hz
In the B motor unit 1b, 1f = 32 Hz, 2f = 64 Hz, 6f = 192 Hz
In the C motor unit 1c, 1f = 24Hz, 2f = 48Hz, 6f = 144Hz
Thus, since these satisfy the condition that they do not all match, the ripples are not synergized and the torque ripple can be reduced.
The above condition is not satisfied when the ratio of the number of poles in any two motor units becomes a relationship such as 1, 2 or 3 times.
[0026]
FIG. 3 is an enlarged cross-sectional view of approximately nine slots of FIG. As shown in the figure, the stator cores 6a, 6b, and 6c are composed of joint-connected split cores in which each tooth 13 can be freely opened and closed around the joint portion. When doing so, the stator cores 6a, 6b, 6c can be bent linearly or in the opposite direction to widen the slot 14, which facilitates winding work and increases the coil space factor.
[0027]
The ratio of the number of poles to the number of slots is 8: 9, and the minimum unit is 8 poles, that is, 9 slots. In the present embodiment, nine slots are used as one block, and a plurality of blocks are welded after winding to be connected in the circumferential direction to form cylindrical stator cores 6a, 6b, 6c. In the A motor unit 1a, 10 blocks are joined, in the B motor unit 1b, 8 blocks are joined, and in the C motor unit, 6 blocks are joined. The stator cores 6a, 6b, 6c, which are cylindrically formed by welding, are fixed to the frames 10a, 10b, 10c using means such as shrinking to constitute a stator for the motor.
[0028]
The stator inner diameters R_A, R_B, and R_C of each motor shown in FIG. 1 are set such that the ratio of R_A, R_B, and R_C is 5: 4: 3, for example, 500 mm, 400 mm, and 300 mm.
[0029]
In this way, by setting the stator inner diameter ratio in accordance with the ratio of the number of poles and the ratio of the number of slots, as shown in FIG. 3, the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c have one The block dimensions are substantially equal, and the circumferential interval (slot pitch) of each tooth 13 and the circumferential interval (pole pitch) of each magnetic pole are equal. As a result, in the stator cores 6a, 6b, and 6c, the pitch of the teeth 13 is equal, and the density of the generated torque can be substantially the same. Equipment can be shared by the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c.
[0030]
Further, in the rotors 5a, 5b, and 5c, the permanent magnets 7a, 7b, and 7c can be made equal in width, so that a magnet fixing jig or the like can be used in common, and the shape of the bottom surface or top surface of the permanent magnet is used. Can be used in common, permanent magnets having the same shape can be used, and the production equipment can be shared.
[0031]
The ratio of R_A, R_B, and R_C does not have to be strictly the integer ratio 5: 4: 3. Further, for example, the outer diameter ratio of the rotors 5a, 5b, and 5c or the diameter to the center of the gap may be set to the integer ratio.
[0032]
As described above, since the three motor units are arranged side by side in the radial direction, it is possible to obtain a rotating electrical machine that is thin and capable of generating a large torque.
[0033]
In addition, since all three motor parts are composed of an inner rotor type, the stator cores of all motor parts can be held on the outer frame by means such as shrinking, and production equipment is shared by the three motor parts. can do.
[0034]
In addition, the ratio of the number of poles or the number of slots of the three motor parts is set to a simple integer ratio such as 5: 4: 3, and the ratio of the stator core inner diameter is substantially matched with the above integer ratio. The slot pitch, pole pitch, etc. can be made substantially equal for the three motor parts, and in the production of the three motor parts, the winding equipment and the magnet fixing equipment can be shared, and the magnets can be shared. be able to.
[0035]
In addition, the stator core of each motor unit is divided into blocks, such as a block of 9 slots, so that it is easy to handle in the manufacturing process. Also, each motor unit has the same size in each block. Therefore, handling becomes easier.
[0036]
Moreover, the ratio of the number of poles of the three motor parts is a simple integer ratio, such as 5: 4: 3, and the ratio of the number of poles of any two motor parts is not an integer multiple, and the torque ripple In this case, since the frequencies that are remarkably generated do not coincide with each other, the ripple can be reduced.
[0037]
Further, since the stator core is formed by concentrated winding, it is easy to automate winding and the axial dimension can be reduced.
[0038]
Further, since a joint-type split core that can expand a slot when winding each tooth is used for the stator core, winding work is facilitated, and the space factor of the coil can be increased.
[0039]
Embodiment 2. FIG.
FIG. 4 is a cross-sectional view showing the rotating electrical machine according to the second embodiment of the present invention, and FIG. 5 is a cross-sectional view showing a BB cross section in FIG. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
[0040]
In the present embodiment, the A motor portion 1a, the B motor portion 1b, and the C motor portion 1c are so-called outer rotor types in which the rotors 5a, 5b, and 5c are arranged on the outer peripheral side of the stator cores 6a, 6b, and 6c. . As a result, in the rotors 5a, 5b, and 5c, the permanent magnets 7a, 7b, and 7c are disposed on the inner periphery of the yokes 11a, 11b, and 11c, so that centrifugal force applied to the permanent magnets 7a, 7b, and 7c is applied to the yokes 11a, 11b. 11c, and a holding mechanism for the permanent magnets 7a, 7b, 7c in consideration of centrifugal force is not required, so that the permanent magnets 7a, 7b, 7c can be easily held by the yokes 11a, 11b, 11c. it can.
[0041]
Further, since the stator cores 6a, 6b, and 6c of the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c are all on the outer peripheral side of the respective frames 10a, 10b, and 10c, the A motor unit 1a and the B motor unit 1b. And the C motor part 1c can be manufactured by the same manufacturing method.
[0042]
Further, as shown in FIG. 5, the relationship between the number of poles and the number of slots or the dimensions R_A, R_B, and R_C in the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c is the same as in the first embodiment. Therefore, the same effect as in the first embodiment can be obtained.
[0043]
Embodiment 3 FIG.
FIG. 6 is a cross-sectional view showing the motor unit according to the third embodiment of the present invention, and shows a cross section perpendicular to the axial direction of the rotating shaft. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
[0044]
In the present embodiment, the stator cores of the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c are configured by stacking integral core pieces that are not divided in the circumferential direction.
[0045]
Since the rigidity of the stator core is increased by making the core piece an integral shape that is not divided in the circumferential direction, the frame can be thinned.
[0046]
In addition, noise, vibration, and torque ripple due to the deformation of the stator core can be reduced.
[0047]
Further, since the relationship between the number of poles and the number of slots or the dimensions R_A, R_B, and R_C in the A motor unit 1a, the B motor unit 1b, and the C motor unit 1c is the same as that in the first embodiment, the first embodiment. The same effect can be obtained.
[0048]
Embodiment 4 FIG.
In the first to third embodiments, the number of poles of the A motor unit 1a is 80, the number of poles of the B motor unit 1b is 64, and the number of poles of the C motor unit 1c is 48. That is, the ratio of the number of poles of the A motor unit 1a, the number of poles of the B motor unit 1b, and the number of poles of the C motor unit 1c is set to 5: 4: 3, but is not limited thereto.
[0049]
FIG. 7 is a cross-sectional view showing the motor unit according to the fourth embodiment of the present invention, and shows a cross section perpendicular to the axial direction of the rotating shaft. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
[0050]
In the present embodiment, the number of poles of the A motor unit 1a is 80, the number of poles of the B motor unit 1b is 60, and the number of poles of the C motor unit 1c is 36. The number of slots is the same as that of the first embodiment. The number of slots of the A motor unit 1a is 90, the number of slots of the B motor unit 1b is 72, and the number of slots of the C motor unit 1c is 54. The ratio between the number of poles and the number of slots in each motor part is different, the ratio between the number of poles and the number of slots of the A motor part 1a is 8: 9, and the ratio of the number of poles and the number of slots of the B motor part 1b is 5: 6. The ratio between the number of poles and the number of slots of the C motor unit 1c is set to 2: 3.
[0051]
The winding pattern in each motor unit is different depending on the ratio between the number of poles and the number of slots.
[0052]
In the A motor unit 1a, the ratio of the number of poles to the number of slots is 8: 9. Therefore, as in the first embodiment, the U phase, the -U phase, and the U phase are wound around three adjacent teeth in order. The V phase, the -V phase, and the V phase are wound around the three adjacent teeth in order, and the W phase, the -W phase, and the W phase are wound around the three adjacent teeth. The winding of each phase is arranged by periodically repeating the winding pattern of 9 teeth. In-phase coils wound around three adjacent teeth are connected in series.
[0053]
In the B motor unit 1b, since the ratio of the number of poles to the number of slots is 5: 6, the same phase is wound around two adjacent teeth. That is, in order to 12 teeth, U phase, -U phase, -W phase, W phase, V phase, -V phase, -U phase, U phase, W phase, -W phase, -V phase, V A phase is wound, and each phase is periodically arranged with these 12 teeth as a unit. Adjacent in-phase are connected in series.
[0054]
Since the ratio of the number of poles to the number of slots in the C motor unit 1c is 2: 3, different phases are sequentially wound around adjacent teeth. That is, the U phase, the V phase, and the W phase are sequentially wound around three adjacent teeth, and each phase is periodically arranged in units of these three teeth.
[0055]
As described above, the degree of freedom in designing the number of poles is improved by making the ratio between the number of poles and the number of slots different between the motor units. As a result, in the present embodiment, the drive frequency of the C motor 1c can be kept low, so that the inverter capacity of the drive unit can be reduced and the cost can be reduced. In addition, since the torque ripple or the frequency of the electromagnetic force can be changed at the same time, torque ripple and noise can be reduced depending on circumstances.
[0056]
Embodiment 5 FIG.
FIG. 8 is a cross-sectional view showing the motor unit according to the fifth embodiment of the present invention, and shows a cross section perpendicular to the axial direction of the rotating shaft. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
[0057]
In the present embodiment, the ratio between the number of poles and the number of slots is different between the three motor parts, as in the fourth embodiment. The ratio of the number to the number of slots is increased, and as a result, the number of poles of all the motor parts is the same.
[0058]
Specifically, the number of poles of the A motor unit 1a, the B motor unit 1b and the C motor unit 1c is 60, the number of slots of the A motor unit 1a is 90, the number of slots of the B motor unit 1b is 72, and the number of slots of the C motor unit 1c is The number of slots is 54. That is, the ratio of the number of poles to the number of slots is different in each motor part. The ratio of the number of poles to the number of slots is 2: 3 for the A motor part 1a, 5: 6 for the B motor part 1b, and 5C for the C motor part 1c. 10: 9.
[0059]
The winding pattern in each motor unit is different depending on the ratio between the number of poles and the number of slots. Since the ratio of the number of poles to the number of slots of the A motor unit 1a is 2: 3, the U phase, the V phase, and the W phase are sequentially wound around three adjacent teeth, and these three teeth are used as a unit. Each phase is arranged periodically.
[0060]
Since the ratio of the number of poles to the number of slots of the B motor unit 1b is 5: 6, the U phase, -U phase, -W phase, W phase, V phase, -V phase,- A U phase, a U phase, a W phase, a -W phase, a -V phase, and a V phase are wound, and each phase is periodically arranged in units of these 12 teeth. Adjacent in-phase are connected in series.
[0061]
Since the ratio of the number of poles to the number of slots of the C motor unit 1c is 10: 9, the U phase, the -U phase, and the U phase are wound around three adjacent teeth in order, and the three adjacent teeth are In order, the W phase, the −W phase, and the W phase are wound, and the V phase, the −V phase, and the V phase are wound around the three adjacent teeth. The winding of each phase is arranged by periodically repeating the winding pattern of 9 teeth. In-phase coils wound around three adjacent teeth are connected in series.
[0062]
In this case, the drive frequency of each motor part can be made equal, and the construction of the drive control part can be facilitated. At this time, a 1f component (a component that pulsates at a frequency that is one time that of the fundamental wave component), a 2f component (a component that pulsates at a frequency twice that of the fundamental wave component), and 6f, which are torque ripple components that are generally significantly generated in the motor The component (the component that pulsates at a frequency six times the fundamental wave component) is, for example, when the rotor makes one revolution per second,
In the A motor unit 1a, 1f = 30Hz, 2f = 60Hz, 6f = 180Hz
In the B motor unit 1b, 1f = 30Hz, 2f = 60Hz, 6f = 180Hz
In the C motor unit 1c, 1f = 30Hz, 2f = 60Hz, 6f = 180Hz
And all the motor parts are equal. At this time, the circumferential positions of the three motor units are determined so that the phases of the torque ripples generated by the three motor units do not match and the sum of the torque ripples generated by the three motor units is minimized. Thus, a rotating electric machine with small torque ripple can be obtained.
[0063]
Embodiment 6 FIG.
FIG. 9 is a cross-sectional view showing the motor according to the sixth embodiment. The same reference numerals as those in FIG. 1 denote the same or corresponding parts.
[0064]
In the present embodiment, the number of poles of the three motor units is the same as in the fifth embodiment.
[0065]
In this case, since the drive frequency of each motor part is equal, three motor parts can be driven with the drive part 2 which consists of the single inverter part 2a. The positional relationship in the circumferential direction of each motor unit is such that the torque generated when each motor unit is energized with the same phase current (for example, the moment when the U-phase current is maximum in the three-phase AC waveform) is applied to all motor units. I try to maximize it. At this time, for example, by connecting all the in-phase windings of each motor unit in series, the three motor units can be driven with the same current.
[0066]
With the above configuration, the configuration of the drive control unit 2 can be simplified, and cost reduction or space saving of the drive control unit 2 can be achieved.
[0067]
In addition, by using the rotating electric machine of the first to sixth embodiments as an electric motor of an elevator hoisting device, a high-performance elevator hoisting machine device with reduced cogging torque or torque ripple is obtained, and an elevator with good riding comfort is obtained. can get.
[0068]
Further, by forming the sheave of the hoisting machine integrally with the rotor of each motor unit, no connection parts are required, and a thinner hoisting machine can be obtained.
[0069]
Embodiment 7 FIG.
FIG. 10 is a cross-sectional view showing the pulley drive device according to the seventh embodiment, and the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
[0070]
In the present embodiment, the rotating electrical machine of the present invention as shown in the first to sixth embodiments is applied to a pulley drive device.
[0071]
That is, the pulley 15 is coaxially coupled to the rotating shaft 9, and the pulley 15 is driven by the rotation of the motor 1. For example, a rope can be hung on the pulley 15 and a car (not shown) can be connected to the rope directly or via another pulley to be used as an elevator drive device.
[0072]
Since the rotors 5a, 5b, 5c of each motor part and the pulley 15 are integrally formed, no connecting parts are required, and a thinner pulley drive device can be obtained.
[0073]
In the above description, the case of the rotary field type (armature is the stator) has been described. However, the present invention is not limited to this, and the present invention can also be applied to the rotary armature type (armature is the rotor). It is.
[0074]
Moreover, although the combination of the number of poles and the number of slots and the dimension or ratio of the inner diameter of the stator are shown for only a few examples, it goes without saying that the present invention is not limited thereto.
[0075]
【The invention's effect】
According to the rotating electrical machine according to the present invention, a plurality of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by the frame and is arranged in the radial direction. Having a protruding tooth and a slot between the teeth, the rotor is a rotating electrical machine in which a magnetic pole portion is formed;
Since the rotor of each set of motor units is arranged radially inside the stator, all the stators of the motor units can be held on a frame on the outer periphery by means such as shrinking. Production equipment can be shared by each motor unit.
[0076]
In addition, a plurality of sets of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by a frame and is disposed between the teeth protruding in the radial direction and the teeth. And the rotor is a rotating electrical machine in which a magnetic pole portion is formed,
Since the rotor of each set of the motor units is arranged on the outer side in the radial direction of the stator, it is not necessary to hold the magnetic pole portion in the rotor in consideration of centrifugal force. Is easy to hold.
[0077]
According to the pulley drive device according to the present invention, since the pulley is connected to the rotor in the rotating electrical machine according to the present invention, a high-performance pulley drive device with reduced cogging torque or torque ripple is obtained.
[0078]
According to the elevator hoist apparatus according to the present invention, since the rotating electrical machine of the present invention is used for an elevator hoist motor, a high-performance elevator hoist apparatus with reduced cogging torque or torque ripple. Is obtained, and the elevator ride is better.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a rotating electrical machine according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the AA cross section of FIG. 1;
FIG. 3 is an enlarged cross-sectional view of approximately nine slots of FIG. 2 taken out.
FIG. 4 is a cross-sectional view showing a rotating electrical machine according to a second embodiment of the present invention.
5 is a cross-sectional view showing a BB cross section in FIG. 4. FIG.
FIG. 6 is a sectional view showing a motor unit according to a third embodiment of the present invention.
FIG. 7 is a sectional view showing a motor unit according to a fourth embodiment of the present invention.
FIG. 8 is a sectional view showing a motor unit according to a fifth embodiment of the present invention.
FIG. 9 is a sectional view showing a rotating electric machine according to a sixth embodiment of the present invention.
FIG. 10 is a sectional view showing a pulley drive device according to a seventh embodiment of the present invention.
[Explanation of symbols]
1 motor, 1a A motor part, 1b B motor part, 1c C motor part,
2 drive unit, 2a A inverter, 2b B inverter, 2c C inverter,
3 rotational position detector, 4 brakes, 5a, 5b, 5c rotor,
6a, 6b, 6c stator, 7a, 7b, 7c permanent magnet, 8 rib,
9 rotating shaft, 10a, 10b, 10c frame,
11a, 11b, 11c rotor yoke part, 12 bearing,
13 teeth, 14 slots, 15 pulleys.

Claims (19)

A plurality of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by a frame, and a tooth projecting in the radial direction and a slot between the teeth And the rotor is a rotating electrical machine in which a magnetic pole part is formed,
The rotating electric machine according to claim 1, wherein the rotor of each set of the motor units is disposed radially inside the stator. A plurality of motor portions each including a set of a cylindrical stator and a cylindrical rotor are provided in the radial direction, and the stator is held by a frame, and a tooth projecting in the radial direction and a slot between the teeth And the rotor is a rotating electrical machine in which a magnetic pole part is formed,
The rotating electric machine according to claim 1, wherein the rotor of each set of the motor units is arranged on a radially outer side of the stator. 3. The rotating electrical machine according to claim 1, wherein three or more motor parts are provided. The ratio of the number of poles of the magnetic pole part between the motor parts is an integer ratio, and the dimension ratio of the stator inner diameter or rotor outer diameter between the motor parts is the integer ratio. The rotating electrical machine according to claim 1. The ratio of the number of poles of the magnetic pole part between the motor parts is an integer ratio, and the dimensional ratio of the stator outer diameter or rotor inner diameter between the motor parts is the integer ratio. The rotating electrical machine according to claim 2. 6. The rotating electrical machine according to claim 4, wherein a ratio of the number of slots between the motor parts is the integer ratio. The ratio of the number of slots between the motor parts is an integer ratio, and the dimensional ratio of the stator inner diameter or rotor outer diameter between the motor parts is the integer ratio. 1. The rotating electrical machine according to 1. The ratio of the number of slots between the motor parts is an integer ratio, and the dimensional ratio of the stator outer diameter or rotor inner diameter between the motor parts is the integer ratio. 2. The rotating electrical machine according to 2. 9. The rotating electrical machine according to claim 7, wherein the number of poles of the magnetic pole part of each set of the motor parts is the same. The rotating electrical machine according to claim 9, wherein circumferential positions between the motor units are arranged so that torque ripples generated in the motor units are out of phase. 10. The rotating electrical machine according to claim 9, wherein a torque generated when a current having the same phase is applied to each of the motor units is maximized in a circumferential position between the motor units. 12. The rotating electrical machine according to claim 1, wherein the stator is divided in a circumferential direction into a plurality of blocks. 13. The rotating electrical machine according to claim 12, wherein the number of the blocks in each set of the motor units is set to a ratio of the number of slots between the motor units. When the ratio of the number of poles of the magnetic pole part between the motor parts is a: b: c: d (where a: b: c: d ... is an integer), a: b: c: d ... 14. The rotating electrical machine according to claim 1, wherein any two ratios are not integers. 15. The rotating electrical machine according to claim 1, wherein one coil is wound around each of the teeth. The rotating electrical machine according to claim 15, wherein the teeth are connected by a joint structure. A pulley drive device comprising a pulley connected to the rotor in the rotating electrical machine according to any one of claims 1 to 16. 18. The pulley drive device according to claim 17, wherein the rotor and the pulley are integrated. An elevator hoist apparatus comprising the rotating electric machine according to any one of claims 1 to 16 as an elevator hoist motor.

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