JP4352679B2 - Revolving motor and compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a revolving motor that revolves a mover with a predetermined axis as a reference, and a compressor using the revolving motor as a drive source.
[0002]
[Prior art]
Conventionally, when operating a mechanism that functions by revolving motion, such as a compressor, a rotary motor (general motor) is used as a drive source, and the rotational motion of the rotary motor is converted into a revolving motion by some mechanical mechanism. It was converted. Here, the rotary motor rotates the rotor by a magnetic attractive force (and repulsive force) acting between the stator and the rotor, and extracts the force for movement. Most of the repulsive force is a radial force, which does not contribute to rotation. Rather, it deforms the stator and makes the rotor eccentric, which has an adverse effect and extracts only a very small tangential force as torque. It was.
[0003]
On the other hand, a motor that directly leads a revolving motion has also been proposed in the past.
[0004]
In Patent Document 1, as shown in FIG. 24, an eccentric motor that drives a use mechanism includes an electric motor including a stator 204 that defines a closed surface path, and a permanent magnet that is arranged to roll on the closed surface path. A series of electromagnetic elements 208 a, 208 b, 208 c, 208 d and electromagnetic elements 208 a, 208 b, 208 c, 208 d arranged along a closed surface path in the stator 240 and the stator 204 are sequentially excited to attract and armature 240. And / or a circuit that rolls along a closed surface path that is repelled, and the armature 240 is connected to the use mechanism so that power is supplied to the use mechanism by the operation of the motor when the armature 240 rolls. An eccentric motor and a fluid pump including a coupling mechanism are described.
[0005]
In Patent Document 2, as shown in FIG. 25, either the mover 301 or the stator 302 is constituted by a winding 321 and a magnetic body 322, and the other is constituted by a winding 321 or a permanent magnet 311 and a magnetic body 312. The mover and stator of the constructed rotary motor are convoluted spirally and each is shifted by 180 ° in mechanical angle. The mover revolves around the motor shaft 313 with a predetermined radius by a variable air gap force with the stator. A spiral variable air gap motor is described which has a structure in which this revolving motion is taken out on a shaft 313.
[0006]
In Patent Document 3, as shown in FIG. 26, a revolving drive of the movable member 403 is performed by applying a magnetic force to the movable member 403 that is allowed to revolve with a predetermined radius and the movable member 403 that is constrained to rotate. A plurality of windings 441 to 448 and an energization control unit for switching the winding to be excited or the excitation direction of the winding. The energization control unit includes a brush and a commutator 407 in contact with the brush and revolves. A revolving actuator is described which serves as a commutator mechanism that is switched by the movable member 403 that moves.
[0007]
[Patent Document 1]
JP-A-6-141527
[0008]
[Patent Document 2]
JP-A-6-78514
[0009]
[Patent Document 3]
JP 2002-78316 A
[0010]
[Problems to be solved by the invention]
However, in Patent Document 1, since all the armatures (that is, the movers) are permanent magnets, the magnetic flux amount of the permanent magnets is small because the cross-sectional area is small for an extremely long axial direction. When only the force is used, only the portion of the magnetic flux of the permanent magnet that faces the stator pole that is energized to be attracted is used. On the other hand, when the repulsive force is used, the permanent magnet is directly exposed to the reverse magnetic field generated by the stator, and there are limitations such as the inability to increase the current and the use of a permanent magnet with high coercive force. It was.
[0011]
Moreover, in patent document 2, when using a permanent magnet for the needle | mover 301, it is difficult to implement | achieve a precise scroll shape by a process of a permanent magnet, and ensuring of intensity | strength is also difficult. Furthermore, it is difficult to magnetize, and it becomes even more difficult with multipolar magnetization. In addition, when an electromagnet is used for both the mover and the stator, a means for supplying power to the mover winding is required, and even if there is a mechanical contact such as a brush or commutator, It was necessary to provide a power source, which was inconvenient in terms of service life. Moreover, in patent document 2, it can be said that revolution motion is converted into rotation motion and force is taken out as rotational motion. And when it is going to be comprised as a scroll for refrigerant | coolant compression as it is using the patent document 2, from a surface of intensity | strength and a process precision, it is difficult to implement | achieve even if it is a permanent magnet and an electromagnet.
[0012]
Even if Patent Document 2 is applied to Patent Document 1, it is difficult to extract the suction force because at least about half of the movable scroll is inside the fixed scroll.
[0013]
In Patent Document 3, since the mover is flat, a movable scroll is provided on one surface of a flat permanent magnet in combination with the eccentric motor and fluid pump of Patent Document 1 and the spiral passage side gap motor of Patent Document 2. A mechanism that generates a revolving motion can be easily considered, but even when this configuration is used, when only the attractive force is used, only the portion of the permanent magnet magnetic flux that faces the stator pole that is energized to be attracted is used. On the other hand, when repulsive force is used, the permanent magnet is directly exposed to the reverse magnetic field generated by the stator, the current cannot be increased, and a permanent magnet having a high coercive force must be used. There is a limit.
[0014]
The present invention has been made in view of the above-described problems, and can drive a revolving motor and a revolving motor that can directly generate revolving motion with a simple configuration, can be downsized, and can reduce mechanical loss. It aims to provide a compressor as a source.
[0015]
[Means for Solving the Problems]
  The revolving motor according to claim 1 comprises a stator having a stator core wound with a winding, and a mover that revolves by being attracted by a magnetic flux generated in the stator by passing a current through the winding. And the stator isAn E-shaped stator core opened on the side of the mover, and a winding applied to a horizontal side in the middle of the E-shaped stator,A magnetic flux is generated in the direction of the revolution axis, and the mover is moved by a radial force generated when the magnetic flux is transmitted to the movable element opposed in the radial direction.It has a mover core, a permanent magnet, a mover core, a permanent magnet, and a mover iron core that are sequentially arranged in the axial direction, and each mover iron core protrudes at least on the inner periphery of the stator core. The two layers of permanent magnets are magnetized in the axial direction and in opposite directions to each other.Is.
[0016]
The revolving motor according to claim 2 has three or more poles at substantially equal intervals in the circumferential direction as the stator, and controls the current flowing through two or more poles at the same time. A device that changes the direction smoothly and continuously is adopted.
[0017]
The revolving motor according to claim 3 has four poles at substantially equal intervals in the circumferential direction as the stator, and controls the current applied to two or more poles at the same time. The one that changes smoothly and continuously is adopted.
[0018]
The revolution motor according to claim 4 employs a motor that is magnetically insulated and forms an independent magnetic path as each pole of the stator.
[0019]
The revolving motor of claim 5 employs a non-magnetic material mechanically connected as each pole of the stator.
[0020]
The revolving motor of claim 6 employs a mechanical connection achieved by joining a ring-shaped non-magnetic material to the outer periphery of a stator core that is not wound.
[0022]
  Claim7This revolving motor adopts a stator inner circumferential surface having substantially the same circumference.
[0023]
  Claim8The revolving motor employs a motor that is controlled so that the magnitude of the attractive force is always substantially constant as a current that is passed through two or more poles.
[0024]
  Claim9This revolving motor employs a motor that is controlled so that the magnitude of the attractive force changes in accordance with the required axial load, as the current that is passed through two or more poles.
[0025]
  Claim10The revolution motor further includes a position detecting means for detecting the position of the mover.
[0026]
  Claim11This revolving motor employs a motor including a search winding as position detecting means.
[0027]
  Claim12The revolving motor employs a stator pole having at least two non-transparent electrodes that deviate from a 180 ° symmetrical position, and measures inductance by using two non-transparent electrode windings as position detecting means. Therefore, the one that detects the position of the mover is adopted.
[0028]
  Claim13This revolving motor employs a position detecting means that estimates a magnetic flux position from voltage and current.
[0029]
  Claim14The revolution motor employs a rectangular wire or a sheet winding as the stator core winding.
[0030]
  Claim15In this revolving motor, the stator iron core and the mover iron core are opposed to each other so as to generate a suction force.
[0031]
  Claim16In this revolving motor, the current flowing through the windings applied to the stator is set in a direction in which the magnetic flux of the permanent magnet inside the mover is increased.
[0032]
  Claim17These revolving motors are connected in parallel to a common sine wave power supply as stator pole windings at 180 ° positions, wound in opposite directions, and connected in series with diodes in opposite directions. The one that is used is adopted.
[0033]
  Claim18The revolution motor further includes revolution trajectory regulation means for regulating the revolution trajectory of the mover.
[0034]
  Claim19This revolution motor employs an eccentric crank as a revolution trajectory regulating means.
[0035]
  Claim20The revolution motor adopts an eccentric bearing as a revolution track control means.
[0036]
  Claim21This revolution motor employs contact between the mover and the stator as a revolution trajectory regulating means.
[0037]
  Claim22The revolution motor further includes a rotation prevention means for preventing the rotation of the movable element.
[0038]
  Claim23This revolution motor employs an Oldham coupling as a means for preventing rotation.
[0039]
  Claim24This revolving motor employs a ball joint as a means for preventing rotation.
[0040]
  Claim25The revolution motor employs a motor having a salient pole at each of the opposed portions of the stator core and the mover core as the rotation preventing means.
[0041]
  Claim26In this revolution motor, the outer diameter of the portion of the mover facing the stator is set larger than the outer diameter of the portion not facing the stator.
[0042]
  Claim27This revolving motor employs a mover iron core provided with at least one of a through hole, a groove and a recess in order to reduce the weight of the mover.
[0043]
  Claim28The scroll compressor uses the revolution motor according to any one of claims 1 to 27 as a drive source.
[0044]
  Claim29The rotary compressor of claim 1 to claim 1.27The revolution motor described in any of the above is used as a drive source.
[0045]
  Claim30The swing compressor of claim 1 to claim 1.27The revolution motor described in any of the above is used as a drive source.
[0046]
  Claim31In the compressor, the movable part of the compressor and the mover iron core of the revolution motor are integrated.
[0047]
  Claim32In this compressor, in order to form a compression chamber, the inner periphery of the stator is covered with a confidential cylinder, and the movable element is a movable piston.
[0048]
  Claim33In this compressor, the swing pin directly connected to the movable piston and the swing bush holding the swing pin also serve as rotation preventing means.
[0049]
  Claim34This compressor is provided with a compression mechanism at both ends in the axial direction of the mover.
[0050]
  Claim35In this compressor, the compression mechanisms provided at both ends in the axial direction of the mover are rotary compressors or swing compressors, and one of the compression mechanisms is compressed in order to shift the suction and discharge timing of each compression mechanism by a half phase. In the mechanism, the piston is directly connected to the mover, and the other compression mechanism is a cylinder in which the cylinder is directly connected to the mover.
[0051]
[Action]
If it is the revolution motor of Claim 1, from the stator which gives winding to a stator iron core, and the mover which revolves by attracting | sucking by the magnetic flux which generate | occur | produces in a stator by sending an electric current through the said winding. The stator isAn E-shaped stator core opened on the side of the mover, and a winding applied to a horizontal side in the middle of the E-shaped stator,A magnetic flux is generated in the direction of the revolution axis, and the mover is moved by a radial force generated when the magnetic flux is transmitted to the movable element opposed in the radial direction.It has a mover core, a permanent magnet, a mover core, a permanent magnet, and a mover iron core that are sequentially arranged in the axial direction, and each mover iron core protrudes at least on the inner periphery of the stator core. The two layers of permanent magnets are magnetized in the axial direction and in opposite directions to each other.Therefore, the revolving motion can be generated by operating the largest radial force as the component of the generated force. At that time, it is only necessary to use a flat permanent magnet, and all the magnetic flux of the permanent magnet can be used for the attractive force. Further, the iron core shape is simple, the winding can be facilitated, and the size can be reduced. Furthermore, a mechanism for converting the rotational motion into the revolving motion is unnecessary, the mechanism can be simplified, the material can be reduced, and the mechanical loss can be reduced.Furthermore, by providing the winding inside the stator, it is possible to easily hold the outer periphery of the stator, and it is also possible to wind the winding frame and then insert it into the stator. Is possible.
[0052]
The revolving motor according to claim 2, wherein the stator has three or more poles at substantially equal intervals in the circumferential direction, and controls the current supplied to two or more poles at the same time, thereby attracting the stator. Since a force that smoothly and continuously changes the direction of the force is adopted, a suction force can be generated in an arbitrary direction by vector control, and the same effect as in claim 1 can be achieved. Can do.
[0053]
In the revolving motor according to claim 3, the stator has four poles at substantially equal intervals in the circumferential direction, and controls the current flowing through two or more poles at the same time. Therefore, it is easy to obtain a constant suction force by applying a current that is 90 ° out of phase on each positive pole only on the positive side of the sine wave. In addition to being able to realize a stable revolving motion, it is possible to achieve the same action as in the first aspect.
[0054]
In the revolving motor according to claim 4, since each of the stator poles is magnetically insulated and forms an independent magnetic path, it is generated by a permanent magnet or winding current. Thus, the magnetic flux can be effectively used as an attractive force without waste, and a small force can be generated. In addition, an effect similar to that of the second or third aspect can be achieved.
[0055]
In the revolving motor according to claim 5, since each pole of the stator is mechanically connected by a non-magnetic material, each pole of the stator can be positioned and fixed. Since unnecessary leakage can be prevented, the deterioration of characteristics can be minimized, and the same effect as in the fourth aspect can be achieved.
[0056]
If it is the revolution motor of Claim 6, what is achieved by joining a ring-like nonmagnetic material to the outer peripheral part of the stator core which has not been wound is adopted as the mechanical connection. Thus, the compressor and the like can be easily held by shrink-fitting and fixing inside the shell-like frame, and the same effect as in the fifth aspect can be achieved.
[0058]
  Claim7If the revolving motor is used, the inner peripheral surface of the stator is on the same circumference, so the minimum air gap due to the revolving motion can be made almost constant regardless of the position of the mover. In addition to generating the suction force, the claims 2 to6The same action as any of the above can be achieved.
[0059]
  Claim8If the revolving motor is used, the current that is applied to two or more poles is a current that is controlled so that the magnitude of the attractive force is always substantially constant. In addition to being able to move at a constant force and a constant speed, claims 2 to7The same action as any of the above can be achieved.
[0060]
  Claim9If the revolving motor is used, a current that is passed through two or more poles is controlled so that the magnitude of the attractive force changes in accordance with the required axial load. When there is a change in shaft load, such as a compressor, the necessary suction force can be generated according to the shaft load, and the force required for the required revolving motion can be generated with the minimum input. Claims 2 to7The same action as any of the above can be achieved. In particular, it is suitable for a load with severe load fluctuations such as a rotary compressor and a swing compressor.
[0061]
  Claim10If this motor is a revolving motor, it has a position detection means that detects the position of the mover. By feeding back the position of the mover to the current or voltage control, a stable suction force is generated with the minimum necessary current. And claims 1 to9The same action as any of the above can be achieved.
[0062]
  Claim11In this case, since a motor including a search winding is used as the position detecting means, the winding is a sensor, which is strong against the refrigerant and restrained by the driving winding. In addition to being able to make any location and size without any problem, more precise position detection is possible.10The same effect can be achieved.
[0063]
  Claim12In this revolving motor, a stator pole having at least two non-transparent electrodes deviating from a 180 ° symmetrical position is employed, and inductance is obtained by using two non-transparent electrode windings as position detecting means. In addition to being able to detect the position of the mover by measuring, it is possible to detect the position using a winding for driving without providing a sensor in the motor.10The same effect can be achieved.
[0064]
  Claim13For this type of revolving motor, the position detecting means that uses the voltage and current to estimate the magnetic flux position is used, so the position is detected using a driving winding without providing a special sensor in the motor. As well as the claims10The same effect can be achieved.
[0065]
  Claim14Since the revolving motor uses a rectangular wire or sheet winding as the stator core winding, it can be aligned winding, and high-density winding minimizes copper loss and iron loss. And claims 1 to13The same action as any of the above can be achieved.
[0066]
  Claim15In this case, the stator core and the mover core face each other so as to generate an attractive force with each other. Therefore, the permeance can be increased, the operating point magnetic flux density can be increased, and the amount of permanent magnets can be increased. If the amount of the permanent magnet is not changed, the attractive force can be increased.14The same action as any of the above can be achieved.
[0067]
  Claim16In this revolving motor, the current flowing through the winding applied to the stator is set in the direction in which the magnetic flux of the permanent magnet inside the mover is increased, so that no demagnetizing field is applied to the permanent magnet. As a result, it is possible to use a magnet having a high residual magnetic flux density and a low coercive force. By increasing the amount of magnetic flux, it is possible to increase the attractive force, or to reduce the thickness of the magnet. The size can be reduced, and inexpensive ferrite magnets and bonded magnets can be used.15The same action as any of the above can be achieved.
[0068]
  Claim17In the case of a revolving motor, the stator poles at 180 ° positions are connected in parallel to a common sine wave power source, wound in opposite directions, and in series with opposite diodes. Since the connected one is adopted, the switching element for the current command can be halved, and the claims16The same effect can be achieved.
[0069]
  Claim18Since the revolving motor is further provided with a revolving orbit restricting means for restricting the revolving orbit of the mover, by restricting the revolving orbit, it is always brought close to any one of the stator poles with a minimum air gap. In addition to being able to generate a large suction force at start-up regardless of the position of the mover, in the case of a compressor, it is possible to minimize refrigerant leakage.17The same action as any of the above can be achieved.
[0070]
  Claim19Since the revolving motor uses an eccentric crank as the revolution trajectory regulating means, the revolution trajectory regulation is strong, the revolution trajectory can be reliably maintained, and the axial direction can be easily maintained. Yes, you can claim18The same effect can be achieved.
[0071]
  Claim20In this case, an eccentric bearing is adopted as the revolution track regulating means, so that the bearing can be miniaturized and the holding function can be miniaturized.18The same effect can be achieved.
[0072]
  Claim21For the revolving motor, the contact between the mover and the stator is adopted as the revolving track regulating means, so that a separate part having a bearing function can be dispensed with and the air gap is close to 0. In addition to generating a large suction force, claims18The same effect can be achieved. However, it is effective when the outer diameter of the mover is small because the processing accuracy of the contact portion between the stator and the mover is required, and if the outer diameter of the mover is large, bearing loss may increase. .
[0073]
  Claim22In this case, the revolving motor further includes a rotation prevention means for preventing the rotation of the mover. Therefore, for example, in the case of a compressor, it is possible to prevent refrigerant leakage in the compressor groove due to rotation, and windage loss. Can be reduced, and claims 1 to17The same action as any of the above can be achieved.
[0074]
  Claim23In this case, the Oldham coupling is used as an anti-rotation means, so that it can be highly reliable and have a long service life.22The same effect can be achieved.
[0075]
  Claim24In this case, a ball joint is adopted as a means for preventing rotation, so that the size can be reduced, the revolving track can be regulated at the same time, and the mechanical loss can be reduced.22The same effect can be achieved.
[0076]
  Claim25In the case of the revolving motor, the rotation prevention means adopts the salient poles facing the stator core and the mover core, respectively, so that the rotation can be prevented only by the shape of the mover core. , Claims22The same effect can be achieved.
[0077]
  Claim26For the revolving motor, the outer diameter of the part of the mover facing the stator is set larger than the outer diameter of the part not facing the stator, so the weight of the mover is reduced and the inertia is reduced. In addition to reducing vibrations, it is possible to prevent the generation of reactive magnetic flux and overcurrent due to the current flowing in the winding in the part of the mover core that does not face the stator core. Claims 1 to25The same action as any of the above can be achieved.
[0078]
  Claim27In order to reduce the weight of the mover, the mover iron core is provided with at least one of a through hole, a groove, and a recess, so that the mover is lightened and inertia is reduced. In addition to being able to reduce vibration by reducing the size, claims 1 to26The same action as any of the above can be achieved.
[0079]
  Claim28If it is the scroll compressor of this, Claim 1 to Claim27Since the revolution motor described in any of the above is used as a drive source, the function of converting the rotational motion into the revolution motion is unnecessary, and since the revolution motion is directly generated, the mechanism can be simplified and the material can be reduced. At the same time, the mechanical loss can be reduced, and the vibration and noise can be reduced because the load fluctuation is small.
[0080]
  Claim29If it is a rotary compressor of Claim 1, Claim 1 to Claim27Since the revolution motor described in any of the above is used as a drive source, a mechanism for converting the rotational motion into the revolution motion is unnecessary, and since the revolution motion is directly generated, the mechanism can be simplified and the material can be reduced. At the same time, mechanical loss can be reduced, and rotation does not necessarily have to be prevented, so that the number of mechanical contacts can be reduced and mechanical loss can be reduced.
[0081]
  Claim30If it is the swing compressor of this, Claim 1 to Claim27Since the revolution motor described in any of the above is used as a drive source, there is no need for a mechanism for converting the rotational motion into the revolution motion. In addition to reducing the mechanical loss, the swing pin and the swing bush have both anti-rotation functions. Loss due to refrigerant leakage can be reduced.
[0082]
  Claim31Since the movable part of the compressor and the mover iron core of the revolving motor are integrated, the compressor can be manufactured easily and can be downsized, and there is no shaft. In addition to reducing vibration and noise without any vibrations, claims28Claims from30The same action as any of the above can be achieved.
[0083]
  Claim32In order to form a compression chamber, the inner circumference of the stator is covered with a confidential cylinder, and the mover is a movable piston. Therefore, the compressor can be reduced in size and the number of parts can be reduced. Other claims29Or claims30The same effect can be achieved.
[0084]
  Claim33In this compressor, the swing pin directly connected to the movable piston and the swing bush holding the swing pin also serve as an anti-rotation means. In addition to reducing mechanical contacts and reducing mechanical loss, claims30The same effect can be achieved.
[0085]
  Claim34Since the compressors are provided with the compression mechanisms at both ends in the axial direction of the mover, it is possible to provide a compressor with a large capacity while the compressor itself can also have a holding mechanism for the mover. Yes, you can claim28Claims from31Or any claim33The same effect can be achieved.
[0086]
  Claim35The compressors provided at both ends in the axial direction of the mover are rotary compressors or swing compressors, in order to shift the suction and discharge timings of the respective compression mechanisms by a half phase. Since the piston is directly connected to the mover and the cylinder is directly connected to the mover in the other compression mechanism, it is easy to shift the phase of load fluctuation of the compression mechanisms at both ends by 180 °. In addition to reducing rotational load fluctuations, vibration and noise can be reduced.34The same effect can be achieved.
[0087]
DETAILED DESCRIPTION OF THE INVENTION
[0088]
Embodiment 1
In FIG. 1 to FIG. 3, for the sake of simplicity, only the stator and the mover are drawn, and the bearing, the compression mechanism, and the like are not shown.
[0089]
A revolving motor according to an embodiment of the present invention includes a stator 1 that is provided with a winding 1b on a stator core 1a, excited by a current flowing through the winding 1b, a permanent magnet 2a, and a rotor core 2b. A movable element 2 that revolves while being attracted to the pole of the stator 1 by interaction with the current flowing in the winding 1b of the stator 1 is included.
[0090]
The stator core 1a has a “U” shape that is open on the side of the mover 2, and the winding 1b is applied to the vertical side of the “U” shape, whereby the stator 1 is The magnetic flux is generated in the direction of the revolution axis, and the revolving motion is caused by the radial force generated by the magnetic flux passing through the air gap to the mover 2 facing in the radial direction. On the other hand, the mover 2 includes a magnet 2a magnetized in the axial direction and a mover core 2b sandwiched from both sides in the magnetization direction. The stator iron core 1a and the mover iron core 2b are opposed to each other so as to generate an attractive force, and the permanent magnet 2a is provided at a predetermined distance from the stator iron core 1a.
[0091]
Since the stators 1 are independent of each other, it is possible to perform winding while rotating the stator core 1a. In this case, a rectangular wire (see FIG. 6) or a sheet winding (see FIG. 7) can be wound, and the space factor of the winding 1b can be made extremely high. Even if the winding has an ordinary circular cross section, if winding is performed with sufficient control, the winding is easy because the wire is not twisted, and the space factor can be increased.
[0092]
The stator 1 has four poles at substantially equal intervals in the circumferential direction (actually, since the upper and lower two poles are paired, there are a total of eight poles. Therefore, although it is somewhat difficult, the number of poles may be an odd number), and the direction of the attractive force is controlled by controlling the current that is simultaneously applied to two adjacent poles. It can be changed smoothly and continuously. Here, as shown in FIG. 8, if only the positive side of the sine wave is applied to each winding 1b with a current whose phase is shifted by 90 °, the magnitude of the current vector is constant and the current vector is constant. Rotate. If the permeability is almost constant, not the magnetic saturation region or extremely low magnetic flux density, the magnitude of the attractive force is constant, and the direction of the attractive force rotates at a constant speed, so that stable revolving motion can be obtained. . Here, the direction of the current is unidirectional in order to prevent a demagnetizing field from being generated in the permanent magnet by generating only an attractive force, but it is also possible to flow the current in the reverse direction. In this case, the repulsive force can also be used.
[0093]
Note that the number of poles of the stator 1 is not necessarily four, but may be three or more. And the more poles, the smoother the revolving, but the smaller the percentage of windings that can be used to generate the attractive force, so the more adjacent poles are energized or the repulsive force is used. Ingenuity is required. Therefore, it is most preferable that the number of poles of the stator is 4, the current vector can be smoothly moved, and two non-passing electrodes can be secured for position detection, and the number of poles can be minimized. As a result, the configuration can be simplified.
[0094]
Here, for example, in a rotary compressor, a swing compressor, and the like, the load greatly fluctuates in one revolution period. Therefore, a design that matches the maximum load is required. Therefore, if the design is such that the motor output is maximized only at the point where the load is maximized, the design with an unnecessarily large rated load may not be required. Here, examples of the method of changing the motor output in accordance with the load include a method of changing the current, a method of changing the number of turns, and a method of changing the amount of magnetic flux. As a method of changing the current, if the current value is changed for each pole as shown in FIG. 9, the resulting attractive force will also fluctuate. At this time, it is important to align the stator pole and the movable part of the compression mechanism. In addition to performing PWM control, the current value can be changed by changing the winding resistance. When current control is performed by a microcomputer, output control is possible by detecting the mover position and issuing a current command. Also, if the resistance is constant and the number of turns is changed, the ampere turn generated at each pole can be changed. As a method of changing the amount of magnetic flux, it is possible to change the amount of magnetic flux by saturation or non-saturation by changing the width of the stator pole. In other words, if the stator pole width is narrowed and magnetic saturation occurs, the amount of magnetic flux decreases compared to the case without magnetic saturation, and the motor output when that pole is energized is smaller than in other cases. Become.
[0095]
Further, each pole of the stator 1 is magnetically insulated and forms an independent magnetic path. However, since the position of each pole of the stator 1 is not determined by itself, each pole of the independent stator 1 is mechanically held by a nonmagnetic material. As a mechanical connection configuration, a ring-shaped non-magnetic material 1c may be connected to the outer peripheral portion of the stator core 1a that is not wound. In the case of a compressor, shrink fitting is performed in the shell. do it. Further, the upper and lower sides of the stator 1 may be sandwiched between ring-shaped nonmagnetic materials.
[0096]
As described above, the current flowing through the winding 1b applied to the stator 1 flows only in one direction, and if that direction is a direction in which the magnetic flux of the permanent magnet 2a in the mover is increased, the demagnetization is performed. The risk of being lost. Further, since a magnet having a small coercive force can be used, a magnet having a larger residual magnetization can be used, and the amount of magnets can be reduced.
[0097]
Note that the inner peripheral surface of the stator has a shape on substantially the same circumference so that the minimum air gap with the stator 1 can be made the same wherever the mover 2 is. However, when the revolution track is not a perfect circle, the shape of the stator inner peripheral surface may be set so that the minimum air gap with the stator 1 can be made the same. The inner peripheral surface of the stator and the outer peripheral surface of the mover do not have to be circular, and may be deformed on the magnetic circuit or according to processing convenience.
[0098]
Furthermore, the outer diameter of the portion of the mover 2 facing the stator 1 is set larger than the outer diameter of the portion not facing the stator 1. The upper and lower mover cores 2b and the permanent magnet 2a are fixed by passing bolts 2c through through holes provided in the mover core 2b having a large outer diameter, and providing spacers 2d between the upper and lower mover cores. The position of the through hole is on the outer side of the mover core 2b having a small outer diameter, but it is preferable that the through hole is on the inner side as much as possible.
[0099]
The bolt 2c and the spacer 2d are preferably made of a non-magnetic material if possible. However, if the leakage of magnetic flux is sufficiently small, the characteristics are not greatly affected even if the magnetic flux is made.
[0100]
If the mover core 2b is a dust core, the permanent magnet 2a may be completely embedded in the mover core. The thickness of the iron core that covers the surface of the permanent magnet 2a in the radial direction may be thin enough that the magnetic flux does not leak.
[0101]
Next, the operation of the revolution motor of this embodiment will be described.
[0102]
By passing a current through the winding 1b applied to one or two adjacent stator poles, excitation is performed in the direction indicated by the dashed arrow in FIG. Since the permanent magnet 2a is magnetized toward the upper part of FIG. 1, the magnetic flux of the permanent magnet 2a is directed toward the excited stator pole at the portion where the outer diameter of the mover 2 is increased. By spanning the stator core 1a through the gap, a radial suction force is generated.
[0103]
When the current flowing through a certain stator pole is the maximum, only one of the poles is excited and the position of the mover is as shown in FIG. 2, but the current of the stator pole gradually becomes smaller, and the fixed adjacent to the revolution direction. The current of the child electrode gradually increases. The position of the mover 2 at this time is as shown in FIG.
[0104]
Here, as for the direction of the magnetic flux of the mover 2, when a steady operation is performed, a constant revolution axis component and a radial component move along a current vector. Therefore, if a laminated steel plate is used for the mover core 2b, it is preferable to laminate in the direction of the revolution axis, as shown in FIG. 4, and manufacturing can be facilitated and eddy current can be reduced.
[0105]
On the other hand, the direction of the magnetic flux of the stator 1 flows in one direction so as to draw a “U” in an “U” -shaped iron core, and the amount simply increases or decreases. Therefore, if a laminated steel plate is used for the stator core 1a, the steel plate may be punched into a “U” shape and laminated in the circumferential direction. Alternatively, as shown in FIG. 5, the portion facing the mover 2 may be laminated in the revolution axis direction, and the portion provided with the winding 1b may be laminated in the radial direction. In any case, eddy current loss can be reduced by stacking in a direction perpendicular to the flow of magnetic flux. In addition, about the stator 1, it is preferable to use the grain-oriented electrical steel sheet which has L direction (direction which is excellent in a magnetic characteristic) in the direction parallel to the flow of magnetic flux, and obtains further excellent BH characteristic and iron loss characteristic. And further reduction of copper loss and iron loss can be achieved. Further, when the division as shown in FIG. 5 is performed, the iron core facing the mover 2 has the L direction perpendicular to the inner peripheral surface of the stator, and the wound iron core has the L direction as the revolution axis direction. Good.
[0106]
In any case, if the stator core 1a is formed with a dust core, there is no need to worry about the stacking direction.
[0107]
Since the mover 2 revolves, windage damage occurs. Therefore, it is better that the mover shape is as symmetric as possible. However, this is not the case when a salient pole is provided on the mover, as will be described later.
[0108]
In addition, since vibration and noise can be reduced by minimizing the inertia, it is preferable to reduce the mass by providing holes, grooves, and recesses 2e especially in portions that do not become magnetic paths or portions where the magnetic flux density is sufficiently low. .
[0109]
If the position of the mover can be detected and fed back to the current control, a more stable, high speed and highly efficient operation can be achieved. Therefore, the position detection of the mover 2 will be considered. Fortunately, when four stator poles are provided, only the two stator poles are energized at the same time, so the remaining two stator poles are not energized. Even better, since the two non-energized stator poles are adjacent to each other, the position of the mover 2 can be estimated by using the two non-energized stator poles. For example, the inductance can be obtained by passing a minute pulse current through the non-energized stator pole, and the mover position can be uniquely estimated by calculating the inductance of the two stator poles. This is preferable because it can be realized without adding any position detection mechanism on the motor side.
[0110]
As other methods, there are a method using a search winding, a method of estimating the magnetic flux position from the motor voltage and current, and the advantage thereof is that no special sensor is required. Similarly, in a high-temperature refrigerant Suitable for a drive source for a compressor that is exposed to
[0111]
As a driving method of this motor, a method of controlling so that a current having a predetermined waveform flows with a PWM inverter can be exemplified, but here, another example will be considered. For example, assuming a single-phase sine wave power supply, consider the circuit configuration. As shown in FIG. 10, a single-phase sine wave power source (a sine wave power source having a variable peak value and frequency is desirable, but a commercial power source may be used) PS is passed through main windings B and D parallel to each other and a capacitor CC. The auxiliary windings A and C that are parallel to each other are connected in parallel. As shown in FIG. 11, the main windings B and D and the auxiliary windings A and C are wound around the stator core 1a in the opposite directions, and the diodes DB and DD are opposite to each other. The diodes DA and DC are connected in series. The solid line arrow in FIG. 11 indicates the winding direction of the winding. First, a sinusoidal current having a phase advanced by 90 ° from the main windings B and D flows through the auxiliary windings A and C. Further, due to the action of the diode, the magnetic flux flows only in the direction in which the magnetic flux of the permanent magnet 2a is increased, and a current as shown in FIG.
[0112]
Further, in the case of a three-phase power supply 3PS, as shown in FIG. 13, the stator has six poles, and the stator pole windings that are 180 ° apart from each other take power from a common phase. The winding direction is reversed, and diodes in opposite directions are connected in series. Also, if the R phase CCW winding, the T phase CW winding, the S phase CCW winding, the R phase CW winding, the T phase CCW winding, and the S phase CW winding are set in the revolution direction, the + component of the sine wave shifted by 60 °. Only appear in sequence, and a magnetic field that revolves CCW (counterclockwise) can be generated. The connection may be as shown in FIG.
[0113]
Here, for example, when adopting a revolution motor as a drive source of the scroll compressor, it is necessary to regulate the revolution track and prevent the rotation so that a gap is not generated between the fixed scroll and the movable scroll to cause a seal failure. is there. Hereinafter, the configuration including the mechanism part will be described.
[0114]
FIG. 14 is a cross-sectional view of a scroll compressor equipped with the revolution motor of this embodiment as a drive source.
[0115]
The movable element 2 of the revolution motor is directly connected to the movable scroll 3, and is held by a bearing 4 that regulates the axial direction and the revolution track. For example, as shown in FIG. 15, the bearing 4 may be an inner / outer double sliding bearing 4a, 4b in which the sliding portions are eccentric, or a crankshaft 4c as shown in FIG. 16 is used. It may be a bearing. The crankshaft 4c rotates (rotates) with the center of the bearing 4d as the rotation axis. Only the revolving motion of the eccentric portion of the crankshaft 4c is transmitted to the mover 2 by the bearing 4e.
[0116]
This bearing 4 regulates the revolution track.
[0117]
In addition, 5 is a fixed scroll, 6 is an Oldham coupling, 7 is a protective thermistor, 8 is a discharge valve, and 9 is a housing.
[0118]
Also, as shown in FIG. 17 (B), the Oldham joint 6 is arranged on the upper portion (left side in FIG. 14) so as to be fitted with the recess 3a provided on the movable scroll 3 (see FIG. 17 (A)). The projecting portion 6a projecting in the x-axis direction and the projecting portion 6b projecting in the y direction projecting to the lower portion (right side in FIG. 14) to be fitted into the hole 9a provided in the housing 9 (see FIG. 17C). The projection 6a in the x-axis direction and the recess 3a provided in the movable scroll 3 are fitted to each other so that movement only in the x-axis direction is possible, and the projection 6b in the y-direction and the housing 9 can be moved only in the y-axis direction (see (D), (E), and (F) in FIG. 17). Thereby, rotation of the movable scroll 3 directly connected to the movable element 2 is restricted.
[0119]
By restricting the rotation, the moving speed of the surface of the mover 2 is reduced, so that the windage loss can be greatly reduced. In particular, it is also suitable for high speeds of 10,000 r / min or more where the windage loss increases.
[0120]
Further, if ball coupling {see FIG. 18 (A)} or EM coupling {see FIG. 18 (B)} is used, rotation can be prevented and the revolution trajectory can be regulated at the same time {NTN TECHNICAL REVIEW No . 68 (2000) "See EM coupling for scroll compressor"}.
[0121]
Specifically, as shown in FIG. 18A, the ball coupling is provided with a movable ring 16a on the back of the movable scroll and a fixed ring 16b on the front housing end surface, and is provided in a plurality of pockets of the rings 16a and 16b. The steel ball 16c is inserted and sandwiched between movable and fixed races 16d and 16e. And the steel ball 16c moves along the pocket inner periphery of ring 16a, 16b, prevents rotation of a movable scroll, and makes a movable scroll turn. The ball coupling is supported by a rolling bearing that receives the pressure in the compression chamber by the movable / fixed races 16d and 16e, thereby improving the mechanical efficiency.
[0122]
Further, as shown in FIG. 18B, the EM coupling is composed of two plates 17a and 17b and steel balls 17c, which are formed by integrally pressing a race and a ring, and the number of parts can be reduced. In addition, in order to reduce the contact surface pressure, it is possible to reduce the size by making the shape of the portion (race) where the axial load of the plates 17a, 17b is applied a curved surface, and by making the center of the race a convex curved surface shape, noise is reduced You can also plan.
[0123]
In the case of a rotary compressor or a swing compressor, it is not always necessary to prevent rotation. In these cases, the mover is used as it is as a movable piston, the inner periphery of the stator is covered with a confidential cylinder, and the cylinder is used. If the mover revolves, the refrigerant is compressed as it is inside the cylinder. Can do. FIG. 19 shows an example of a rotary compressor. In FIG. 19, 11a is a compressor casing, 11b is a stator, 11c is a cylinder, 11d is a revolving rotor and piston, and 11e is a vane.
[0124]
FIG. 20 is an example of a swing compressor. In the case of a swing compressor, since the swing pin 12e is fixed to the revolution rotor & piston 12d, the rotation can be prevented by fixing the swing pin 12e with the swing bush 12f. The swing compressor can eliminate friction and gas leakage due to sliding between the vane and the revolving rotor & piston in the rotary compressor, and can improve efficiency particularly in a low speed region.
[0125]
In the case of a compressor having only one compression mechanism, particularly in a rotary compressor or a swing compressor, load fluctuation during one rotation is large, and vibration and noise may be increased. If the mover itself does not become a movable piston, as shown in FIG. 21, compression mechanisms 14 and 15 are provided at both ends of the mover 13 in the axial direction, and the phase of each load fluctuation is shifted by 180 °. Load fluctuation during rotation can be reduced. For this purpose, the suction and discharge timings may be shifted by 180 °. As an example, the upper compression mechanism 14 is fixed to the movable cylinder 14a and the fixed piston 14b, and the lower compression mechanism 15 is fixed to the movable piston 15a and the fixed cylinder 15b. If so, the relative position of the piston with respect to the cylinder can be shifted by 180 °.
[0126]
Embodiment 2
FIG. 22 is a schematic view showing a revolution motor according to another embodiment of the present invention.
[0127]
A stator 21 of the revolving motor has an “E” -shaped stator core 21 a opened on the side of the movable element 22, and a horizontal center in the middle of the “E” -shaped stator core 21 a. A winding 21b is provided on the side. Therefore, since the winding 21b is housed in the space above and below the horizontal side in the middle, there is no winding 21b outside the stator core 21a, and it is easy to fix to the frame. The mover 22 has a mover iron core 22a, a permanent magnet 22b, a mover iron core 22c, a permanent magnet 22d, and a mover iron core 22e arranged in this order in the axial direction, and each mover iron core 22a, 22c, 22e is It faces at least a portion protruding from the inner peripheral portion of the stator core 21a. The two layers of permanent magnets 22b and 22d are both magnetized in the axial direction and in opposite directions. If a current is passed through the winding 21b in a predetermined direction, magnetic flux is generated from the horizontal side in the middle of the “E” -shaped stator core 21a, and the two permanent magnets of the mover 22 are generated. Magnetic flux passes through the mover core 22c sandwiched between 22b and 22d. When the upper permanent magnet 22b is magnetized upward in the drawing and the lower permanent magnet 22d is magnetized downward in the drawing, an attractive force is generated on the mover 22. The magnetic flux in the direction that intensifies the magnetic flux of the permanent magnets 22b and 22d again extends over the upper and lower horizontal sides of the "E" -shaped stator core 21a. The flow of magnetic flux is as shown by the dashed arrows in FIG.
[0128]
The advantage of this embodiment is that, since the winding 21b is substantially surrounded by the stator core 21a, the magnetic flux effectively flows to the stator core 21a by the current flowing through the winding 21b. Even if the frame for fixing the magnet is a magnetic material, magnetic flux leakage does not occur, and as much magnetizing force as possible can be obtained with a small current. Note that the vertical sides of the “E” -shaped stator core 21a and the widths of the upper and lower horizontal sides (the size in the direction perpendicular to the flow of magnetic flux in FIG. 22 and on the paper surface) are as follows: Considering the amount of magnetic flux flowing through the stator core 21a, it suffices to have about half of the horizontal side in the middle of the “E” -shaped stator core 21a.
[0129]
Since the stators 21 are independent, it is possible to perform winding while rotating the stator core 21a. In this case, it is possible to wind a rectangular wire or a sheet winding, and the space factor of the winding 21b becomes extremely high. Even if the winding has an ordinary circular cross section, if winding is performed with sufficient control, the winding is easy because the wire is not twisted, and the space factor can be increased. Moreover, you may insert the coil | winding arranged in advance on the winding frame into the stator core 21a previously.
[0130]
The permanent magnets 22b and 22d have been described on the assumption that they have a disk shape. However, a non-circular flat plate may be used according to a required amount of magnetic flux, and a plurality of non-circular flat plate-shaped permanent magnets are arranged. Also good.
[0131]
Embodiment 3
FIG. 23 is a schematic view showing a revolution motor according to still another embodiment of the present invention.
[0132]
This revolution motor is different from the revolution motor according to the first embodiment in that salient poles are provided on portions of the mover 32 facing the stator poles.
[0133]
In this embodiment, since the salient pole of the mover 32 and the stator pole face each other, rotation can be prevented.
[0134]
【The invention's effect】
The invention of claim 1 can generate the revolving motion by operating the largest radial force as the component of the generated force as it is.Flat plateIt is only necessary to use a permanent magnet, and all the magnetic flux of the permanent magnet can be used for the attraction force, the iron core shape is simple, the winding can be facilitated, the size can be reduced, and the rotational motion can be reduced. No mechanism to convert to revolving motion is required, the mechanism can be simplified, material can be reduced, and mechanical loss is also reduced.Furthermore, the outer periphery of the stator can be easily held by winding the inside of the stator, and it is also possible to insert the winding into the stator after winding on the winding frame. Lines are possibleThere is a unique effect.
[0135]
The invention of claim 2 can produce a suction force in an arbitrary direction by vector control, and has the same effect as that of claim 1.
[0136]
The invention of claim 3 can easily generate a substantially constant attractive force only by applying a current whose phase is shifted by 90 ° on the positive side of the sine wave, and realizes a stable revolving motion. In addition, the same effects as in the first aspect can be obtained.
[0137]
According to the invention of claim 4, the magnetic flux generated by the permanent magnet or the winding current can be effectively used as an attractive force without waste, and it is small and can generate a strong force. Has the same effect as.
[0138]
According to the fifth aspect of the present invention, each pole of the stator can be positioned and fixed, and unnecessary leakage of the magnetic flux can be prevented, so that the deterioration of the characteristics can be suppressed to the minimum, and the same effects as in the fourth aspect are achieved. Play.
[0139]
The invention of claim 6 has the same effect as that of claim 5 in addition to facilitating holding by shrink fitting and the like inside the shell-like frame such as a compressor.
[0141]
  According to the invention of claim 7, the minimum air gap due to the revolving motion can be made substantially constant regardless of the position of the mover, and a stable suction force can be generated.6The same effect as any of the above is achieved.
[0142]
  Claim8According to the invention of claim 2, there is no unevenness in the revolving motion, and it can be moved at a constant force and a constant speed.7The same effect as any of the above.
[0143]
  Claim9According to the invention, when there is a change in the shaft load, such as a compressor, the necessary suction force can be generated according to the shaft load, and the force necessary for the required revolving motion can be generated with the minimum input. In addition, it can be claimed in claims 2 to7The same effect as any of the above.
[0144]
  Claim10According to the invention, a stable suction force can be generated with a minimum necessary current by feeding back the mover position to the current or voltage control.9The same effect as any of the above.
[0145]
  Claim11This invention is resistant to refrigerant due to the winding being a sensor, and can be set to any location and size without being constrained by the driving winding. Is possible and claims10Has the same effect as.
[0146]
  Claim12According to the invention, the position can be detected by using a winding for driving without providing a sensor in the motor.10Has the same effect as.
[0147]
  Claim13According to the invention, the position can be detected by using a winding for driving without providing a sensor in the motor.10Has the same effect as.
[0148]
  Claim14According to the invention, aligned winding is possible, and copper loss and iron loss can be minimized by high-density winding.13The same effect as any of the above.
[0149]
  Claim15According to the present invention, the permeance can be increased, the operating point magnetic flux density can be increased, the amount of permanent magnets can be minimized, or the attractive force can be increased if the amount of permanent magnets is not changed.14The same effect as any of the above.
[0150]
  Claim16According to the invention, due to the fact that the demagnetizing field is not applied to the permanent magnet, a magnet having a high residual magnetic flux density and a low coercive force can be used, and the attractive force can be increased by increasing the amount of magnetic flux, Alternatively, the thickness of the magnet can be reduced, the cost can be reduced and the size can be reduced, and an inexpensive ferrite magnet or bonded magnet can be used.15The same effect as any of the above.
[0151]
  Claim17In addition to being able to halve the number of switching elements for current command,16Has the same effect as.
[0152]
  Claim18According to the invention, by restricting the revolution trajectory, it is always possible to bring it close to any one of the stator poles with a minimum air gap, and a large suction force can be generated at the start-up regardless of the position of the mover. In addition, in the case of a compressor, the leakage of refrigerant can be minimized, and claims 1 to17The same effect as any of the above.
[0153]
  Claim19According to the invention, the revolution trajectory regulation is strong, the revolution trajectory can be reliably maintained, and the axial direction can be easily maintained.18Has the same effect as.
[0154]
  Claim20According to the invention, the bearing can be miniaturized and the holding function can be miniaturized.18Has the same effect as.
[0155]
  Claim21According to the present invention, a separate part having a bearing function can be dispensed with, and since the air gap is close to 0, an extremely large suction force can be generated.18Has the same effect as.
[0156]
  Claim22According to the invention, for example, in the case of a compressor, it is possible to prevent refrigerant leakage in the compressor groove due to rotation, and to reduce windage loss.17The same effect as any of the above.
[0157]
  Claim23The invention of this invention is reliable and can extend the service life.22Has the same effect as.
[0158]
  Claim24The invention of the present invention can be downsized, and at the same time, can control the revolving track and reduce the mechanical loss.22Has the same effect as.
[0159]
  Claim25In addition to being able to prevent rotation only by the shape of the armature core,22Has the same effect as.
[0160]
  Claim26This invention reduces the vibration by reducing the weight of the mover and reducing the inertia, and the reactive magnetic flux and the overcurrent are generated by the current flowing in the winding inside the mover core that is not opposed to the stator core. In addition to reducing windage loss, the claims 1 to25The same effect as any of the above.
[0161]
  Claim27According to the present invention, vibration can be reduced by reducing the weight of the mover and reducing the inertia.26The same effect as any of the above.
[0162]
  Claim28The invention of this invention does not require the function of converting rotational motion into revolving motion, and directly generates revolving motion, so the mechanism can be simplified, material can be reduced, mechanical loss can be reduced, and load fluctuations can be reduced. Is small, and thus has a unique effect of reducing vibration and noise.
[0163]
  Claim29According to the invention, a mechanism for converting the rotational motion into the revolving motion is unnecessary, and since the revolving motion is directly generated, the mechanism can be simplified, the material can be reduced, the mechanical loss can be reduced, and the rotation can be reduced. Since it is not always necessary to prevent it, the mechanical contact is reduced and the mechanical loss can be reduced.
[0164]
  Claim30The invention of the present invention does not require a mechanism for converting the rotational motion into the revolving motion, and directly generates the revolving motion. Therefore, the mechanism can be simplified, the material can be reduced, and the mechanical loss can be reduced. Since the swing bush has an anti-rotation function, mechanical contacts are reduced, mechanical loss can be reduced, and a sliding loss and loss due to refrigerant leakage can be reduced as compared with a rotary compressor.
[0165]
  Claim31The invention of the present invention is easy to manufacture and can be downsized, and since there is no shaft, no torsional vibration occurs through the shaft, and vibration and noise can be reduced.28Claims from30The same effect as any of the above.
[0166]
  Claim32The invention can reduce the size of the compressor and reduce the number of parts.29Or claims30Has the same effect as.
[0167]
  Claim33According to the invention, since the swing pin and the swing bush have an anti-rotation function, the mechanical contact can be reduced and the mechanical loss can be reduced.30Has the same effect as.
[0168]
  Claim34According to the invention, the compressor itself can also have a movable member holding mechanism, and can provide a compressor having a large capacity.28Claims from31Or any claim33Has the same effect as.
[0169]
  Claim35According to the invention, it is easy to shift the phase of the load fluctuation of the compression mechanisms at both ends by 180 °, the load fluctuation of one rotation can be reduced, and vibration and noise can be reduced.34Has the same effect as.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of an embodiment of a revolution motor of the present invention.
FIG. 2 is a plan view of the revolution motor of FIG. 1;
FIG. 3 is a plan view showing a state in which a mover has revolved based on the state of FIG. 2;
FIG. 4 is a schematic view showing an example of a laminated structure of movers.
FIG. 5 is a perspective view showing an example of a laminated structure of stators.
FIG. 6 is a schematic view showing a state in which a rectangular wire is wound.
FIG. 7 is a schematic view showing a state where a sheet coil is wound.
FIG. 8 is a diagram showing an example of energization states and attractive forces to the windings of four stators.
FIG. 9 is a diagram showing another example of energization states and attractive forces to the windings of four stators.
FIG. 10 is an electric circuit diagram showing a configuration for controlling energization from a single-phase power supply to four stator windings;
FIG. 11 is a schematic diagram showing winding directions of four stator windings;
FIG. 12 is an electric circuit diagram showing a configuration for controlling energization from a three-phase power source to windings of six stators.
FIG. 13 is a schematic diagram showing winding directions of windings of six stators.
FIG. 14 is a schematic longitudinal sectional view showing a configuration of a scroll compressor.
FIG. 15 is a plan view showing an example of a bearing.
FIG. 16 is a perspective view showing another example of a bearing.
FIG. 17 is a schematic view showing the configuration and operation of an Oldham coupling.
FIG. 18 is a schematic view showing configurations of a ball coupling and an EM coupling.
FIG. 19 is a schematic view showing a configuration of a rotary compressor.
FIG. 20 is a schematic view showing a configuration of a swing compressor.
FIG. 21 is a schematic view showing a configuration of a compressor provided with a compression mechanism at both ends of the mover.
FIG. 22 is a schematic longitudinal sectional view of another embodiment of the revolution motor of the present invention.
FIG. 23 is a plan view of still another embodiment of the revolution motor of the present invention.
FIG. 24 is a schematic view showing a configuration of a conventional eccentric motor.
FIG. 25 is a schematic view showing a configuration of a conventional spiral variable air gap motor.
FIG. 26 is a schematic view showing a configuration of a conventional revolution actuator.
[Explanation of symbols]
1,21 Stator 1a, 21a Stator core
1b, 21b Winding 1c Non-magnetic material
2, 22 Movers 2a, 22b, 22d Permanent magnets
2b, 22a, 22c, 22e Movable iron core

Claims (35)

A stator (1) formed by winding a stator core (1a) with a winding (1b), and a revolving motion attracted by a magnetic flux generated in the stator (1) by passing a current through the winding (1b). In the revolving motor consisting of the movable element (2)
The stator (1) includes an E-shaped stator core (21a) opened on the movable element (22) side, and a winding (21b) applied to a horizontal side in the middle of the E-shaped stator. And moving the mover (2) by a radial force generated by generating a magnetic flux in the direction of the revolution axis and passing the magnetic flux to the mover (2) opposed in the radial direction, and the mover (2) has a mover iron core (22a), a permanent magnet (22b), a mover iron core (22c), a permanent magnet (22d), and a mover iron core (22e) arranged sequentially in the axial direction. Each of the mover cores (22a) (22c) (22e) faces at least a portion protruding from the inner peripheral portion of the stator core (21a), and has two layers of permanent magnets (22b) (22d). ) is in both the axial direction and formed by magnetized in opposite directions to each other Revolving motor, characterized in that the at it.   The stator (1) has three or more poles at substantially equal intervals in the circumferential direction, and controls the current applied to two or more poles at the same time, thereby smoothing the direction of the attractive force, and The revolution motor according to claim 1, which is continuously changed.   The stator (1) has four poles at substantially equal intervals in the circumferential direction, and controls the current applied to two or more poles at the same time so that the direction of the attractive force is smooth and continuous. The revolving motor according to claim 1, wherein the revolving motor is changed dynamically.   The revolution motor according to claim 2 or 3, wherein each pole of the stator (1) is magnetically insulated and forms an independent magnetic path.   The revolution motor according to claim 4, wherein each pole of the stator (1) is mechanically connected by a non-magnetic material. The revolution motor according to claim 5, wherein the mechanical connection means is achieved by joining a ring-shaped non-magnetic body (1 c) to the outer peripheral portion of the stator core (1 a) that is not wound. . The revolution motor according to any one of claims 2 to 6 , wherein the stator inner peripheral surface is on substantially the same circumference. The revolving motor according to any one of claims 2 to 7 , wherein the current supplied to two or more poles is controlled so that the magnitude of the attractive force is always substantially constant. The revolution according to any one of claims 2 to 7 , wherein the current supplied to two or more poles is controlled such that the magnitude of the attractive force changes in accordance with a required axial load. motor. The revolution motor according to any one of claims 1 to 9 , further comprising position detection means for detecting a mover position. The revolving motor according to claim 10, wherein the position detecting means includes a search winding. The stator pole has at least two non-transparent electrodes that deviate from the 180 ° symmetrical position with respect to each other, and the position detection means determines the mover position by measuring the inductance using the windings of the two non-transparent electrodes. The revolution motor according to claim 10, which is to be detected. The revolution motor according to claim 10, wherein the position detection means estimates the magnetic flux position from voltage and current. The revolution motor according to any one of claims 1 to 13 , wherein the winding of the stator core is a flat wire or a sheet winding. The revolution motor according to any one of claims 1 to 14 , wherein the stator core and the mover iron core are opposed to each other so as to generate a suction force. The revolution motor according to any one of claims 1 to 15 , wherein the current flowing through the winding applied to the stator is in a direction in which the magnetic flux of the permanent magnet inside the mover is increased. The stator pole windings at 180 ° relative to each other are connected in parallel to a common sinusoidal power source, wound in opposite directions and connected in series with opposite diodes. 16. A revolution motor according to 16 . The revolution motor according to any one of claims 1 to 17 , further comprising a revolution trajectory regulating means for regulating a revolution trajectory of the mover. The revolution motor according to claim 18, wherein the revolution trajectory regulating means is an eccentric crank. The revolution motor according to claim 18, wherein the revolution track regulating means is an eccentric bearing. The revolution motor according to claim 18, wherein the revolution trajectory regulating means is contact between the mover and the stator. The revolution motor according to any one of claims 1 to 17 , further comprising a rotation prevention means for preventing the rotation of the mover. The revolution motor according to claim 22, wherein the rotation preventing means is an Oldham joint. The revolution motor according to claim 22, wherein the rotation preventing means is a ball joint. 23. The revolution motor according to claim 22, wherein the rotation preventing means has salient poles at opposing portions of the stator core and the mover core. The revolution motor according to any one of claims 1 to 25 , wherein an outer diameter of a portion of the mover facing the stator is larger than an outer diameter of a portion not facing the stator. The revolving motor according to any one of claims 1 to 26 , wherein the mover iron core is provided with at least one of a through hole, a groove, and a recess in order to reduce the weight of the mover. A scroll compressor using the revolution motor according to any one of claims 1 to 27 as a drive source. A rotary compressor using the revolution motor according to any one of claims 1 to 27 as a drive source. A swing compressor using the revolution motor according to any one of claims 1 to 27 as a drive source. The compressor according to any one of claims 28 to 30 , wherein the movable part of the compressor and the mover core of the revolving motor are integrated. 31. The compressor according to claim 29 or 30, wherein the inner periphery of the stator is covered with a confidential cylinder to form a compression chamber, and the movable element is a movable piston. The compressor according to claim 30, wherein the swing pin directly connected to the movable piston and the swing bush holding the swing pin also serve as rotation preventing means. The compressor according to any one of claims 28 to 31 , or a compressor according to claim 33 , wherein compression mechanisms are provided at both ends of the mover in the axial direction. The compression mechanism provided at both ends in the axial direction of the mover is a rotary compressor or a swing compressor. One compression mechanism has a piston directly connected to the mover, and the other compression climate is a cylinder directly connected to the mover. 35. The compressor of claim 34, wherein:

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