JP2013240147A - Superconduction rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new superconduction rotary machine which skillfully utilizes superconduction characteristics to achieve a small and lightweight structure and high efficiency without supplying power from the exterior to a superconductor incorporated in a rotor.SOLUTION: A superconduction rotary machine is composed of: an armature coil 2 provided at a stator 1; a plate like superconductor 4 that is housed and disposed in a hollow rotation part 3a of a rotor so as to be aligned with a rotation center of the rotor 3 and is formed by a rectangular thin film superconductor. An electromagnetic force is generated by mutual action of a shield current, induced on the plate like superconductor 4 by applying a magnetic field (a rotary magnetic field) that is generated by the armature coil 2 with the superconductor 4 cooled in a superconduction state, and the armature magnetic field. Rotation torque is generated in the rotor 3 on the basis of the electromagnetic force to rotationally drive the rotor.

Description

  The present invention relates to a superconducting rotating machine applied to power sources for ships, automobiles, various industrial machines and the like.

  In recent years, along with the advent and development of high-temperature oxide superconductors (yttrium-based (Y-based) and bismuth-based (Bi-based)) that transition to superconductivity near the temperature of liquid nitrogen (77K), they are small and light in the field of rotating machines. Various researches and developments related to superconducting rotating machines aiming for higher efficiency and higher efficiency are underway in Japan and overseas.

As for the application of the superconductor to the rotating machine, the rotor of the rotating machine is made superconductive and the stator is made normal conducting, or the rotor and stator are both made superconductive.
In an AC rotating machine, there is a problem that an AC loss occurs in the superconductor employed in the armature coil in order to cause an alternating current to flow through the armature coil, and the coil shape is also complicated. The development of superconducting rotating machines that apply the above has become the mainstream, and the following prior art documents are known as examples of research and development that have already been published.

  In the superconducting synchronous rotating machine shown in Patent Document 1, a field coil composed of superconducting wires is housed in a cylindrical shield (cryostat structure) of a rotor, and the field coil is brought to a critical temperature or lower with a refrigerant such as liquid nitrogen. The rotating machine is reduced in size and weight by cooling and generating a strong field magnetic field by feeding a direct current to the field coil from the outside.

  By the way, this superconducting synchronous rotating machine has a complicated support structure for the superconducting field coil arranged on the rotor, and a DC field current is externally applied to the superconducting field coil cooled below the superconducting critical temperature. ) Requires a current lead and a slip ring / brush to supply power. In addition, a synchronous motor is connected to a field coil via a slip ring / brush at the time of startup, and a secondary resistance starting method is used. A starting means for starting the rotating machine as an induction motor is also required.

  Patent Document 2 discloses a superconducting rotating machine (electric motor) capable of synchronous operation with the same structure as an induction rotating machine. In this superconducting rotating machine, the rotor is composed of a laminated body of a high-temperature superconductor and a torque shield made of a normal conducting material, and energization of an armature coil (primary winding) placed on the stator is started at room temperature. The rotating machine is started in the induction mode by the induction torque generated by the interaction between the alternating magnetic field and the induced current induced in the torque shield of the rotor upon application of the alternating magnetic field (rotating magnetic field) generated by the rotor. When the rotation speed reaches a predetermined rotational speed, the superconductor is cooled to a superconducting state below the critical temperature, and the alternating magnetic field is captured by the superconductor and is synchronously rotated.

  According to this superconducting rotating machine, it is possible to operate without supplying electric power to the rotor from the outside, and although the structure can be simplified as compared with the superconducting synchronous rotating machine described in Patent Document 1, it can be rotated on the other hand. In order to shift from induction mode to synchronous operation at the start-up of the machine, it is necessary to determine the critical temperature of the superconductor and cool the superconductor below the critical temperature, and the temperature raising and lowering process takes a relatively long time. In short, there is a problem that the operation response of the rotating machine is lowered. For this reason, in a rotating machine that is used for applications that frequently start and stop like an electric vehicle, it is difficult to maintain a superconductor below the critical temperature due to the generation of large Joule heat (copper loss) in the torque shield. In addition, copper loss increases and the efficiency of the rotating machine decreases.

  On the other hand, Patent Document 3 proposes a superconducting rotating machine that improves the problem of Patent Document 2. This superconducting rotating machine consists of a rotor bar made of normal conducting wire to the rotor core of a squirrel-cage induction rotating machine, a normal conducting lead winding with end rings connected to both ends, and an end ring to a rotor bar made of superconducting wire. Are combined with a superconducting lead-shaped winding connected to each other and accommodated in a slot formed on the peripheral surface of the rotor core.

  According to this superconducting rotating machine, in the normal conducting state, the induction torque is initiated by the interaction between the induced current flowing in the normal conducting lead winding and the rotating magnetic field generated by energizing the armature coil arranged on the stator side. In the superconducting state, the superconducting cage winding captures the magnetic flux of the rotating magnetic field applied from the armature coil of the stator and operates synchronously, so that the rotating machine does not depend on the superconducting critical temperature. I can do it.

JP 2003-158867 A Japanese National Patent Publication No. 8-505515 Republished patent 2009/116219

  By the way, also in the superconducting rotating machine of Patent Document 3 which improves the problem of Patent Document 2 described above, there are the following problems in practical use.

  In other words, the superconducting rotating machine disclosed in Patent Document 3 is composed of a cage rotor in which a normal conducting lead-shaped winding and a superconducting lead-shaped winding are provided in the rotor core, so that it exceeds the critical temperature of the superconducting lead winding. When starting the rotating machine at room temperature, an induction current flows through the normal conducting lead-shaped winding as in the case of the torque shield in the superconducting rotating machine disclosed in Patent Document 2, causing large Joule heat and copper loss.

  Also, for superconducting lead-type windings, it is necessary to electrically connect both ends of the rotor bar and the end ring, complicating the winding structure, and soldering is also required for the electrical connection between the rotor bar and the end ring. It is considered that it is difficult to ensure high reliability for anti-centrifugal load and long-term use because the connection method by attaching is common and often causes problems in the joining strength. In addition, since the normal conducting and superconducting squirrel-cage windings are housed in the heavy rotor core slots, it is difficult to reduce the weight and size of the superconducting rotating machine.

  The present invention has been made in view of the above points, and the object thereof is not to supply power to the superconductor incorporated in the rotor from the outside, and the rotor includes a torque shield in Patent Document 2, and Patent Document 3 In addition to reducing the size and weight of the superconductor by skillfully utilizing the superconducting properties of the superconductor, there is no need to install a normal conducting metal body with Joule heating, such as a normal conducting lead-type winding, and a rotor core that is heavy. It is another object of the present invention to provide a novel superconducting rotating machine that has been configured so as to exhibit a highly efficient rotating function.

In order to achieve the above object, a superconducting rotating machine of the present invention includes an armature coil provided on a stator side and a superconducting rotor having a flat superconductor, and generates a magnetic field from the armature coil. The superconducting rotor is configured to generate a rotational force based on an electromagnetic force generated by the interaction between the shielding current induced in the superconductor and the magnetic field when applied to the flat superconductor. (Claim 1) Specifically, it can be configured in the following manner.
(1) The flat superconductor is composed of at least one thin film superconductor whose outer contour is rectangular, and the thin film superconductor is arranged in alignment with the axial center of the rotor.
(2) The flat superconductor is composed of a composite of a superconducting material and a normal conducting material as a stabilizing material.
(3) The flat superconductor is composed of a plurality of rectangular superconductors, and the plurality of rectangular superconductors are arranged in a direction perpendicular to the main surface of the superconductor (claim 4). .
(4) The plurality of rectangular superconductors arranged in an overlapping manner include an electrical insulating material between the superconductors (Claim 5).
(5) The plurality of rectangular superconductors arranged in an overlapping manner are arranged alternately with a rectangular magnetic material (Claim 6).
(6) The flat superconductor is divided into a plurality of parts, and the divided superconductor division lines are electrically connected to the ends in the perpendicular direction.
(7) a rotation angle position detector provided at a shaft end of the superconducting rotor, and a control device that performs angle control of the magnetic field generated by the armature coil based on the rotation angle of the rotor detected by the detector; (Claim 8).

According to the present invention described above, the following effects can be obtained.
(1) First, a plate-shaped superconductor is used for the rotor, and an appropriate magnetic field strength (less than the critical magnetic field) generated by energizing the armature coil of the stator with the superconductor cooled to the superconducting state. When an alternating magnetic field (rotating magnetic field) is applied, a shielding current is induced in the flat superconductor and flows in a loop shape, and an electromagnetic force (Lorentz) is applied to the flat superconductor due to the interaction between the shielding current and the alternating magnetic field. Force) is generated, and this electromagnetic force becomes a rotational force (couple) with respect to the axial center of the rotor, and the rotor rotates in synchronization with the armature magnetic field.

Here, by using a thin film superconductor having a rectangular outline as the flat superconductor, a large shielding current can be induced even if the magnetic field applied from the armature coil is small.
(2) Further, since the rotor of the present invention does not include the normal conducting metal body such as the torque shield and the normal conducting lead-shaped winding in Patent Document 2 and Patent Document 3 described above, Copper loss does not occur, and a rotor containing a flat superconductor can be constituted by a coreless air-core rotor, so that the rotating machine is smaller than the cage rotor structure of Patent Document 3. , Weight reduction can be achieved.
(3) Further, the above-described flat superconductor is composed of a laminated body in which a plurality of thin film superconductors are stacked in a direction perpendicular to the main surface, and the laminated body is symmetrical with the axial center of the rotor. In addition to being able to enhance the rotational force generated in the interaction with the armature magnetic field, the effective mechanical strength of the laminate is increased and the thin film superconductor is deformed by the centrifugal load of the rotating machine. , It can also be expected to prevent damage.
(4) Also, in the previous item (3), by arranging a magnetic material between the thin film superconductors of each sheet, the air gap magnetic field applied to the rotor is concentrated on the superconductor, and a large rotational force is efficiently obtained. It can occur well.
(5) In addition, it is difficult to manufacture a wide-area thin-film superconductor with the current manufacturing technology. However, in this respect, the flat superconductors are divided into a plurality of pieces and juxtaposed. By adopting a configuration in which the ends of the superconductor dividing lines and the ends perpendicular to each other are electrically interconnected, it is possible to configure a high-power rotating machine by combining multiple thin-film superconductors with a relatively small area. Become.
(6) Further, a rotational angle position detection mechanism is provided at the shaft end of the rotor, and the magnetic field strength, phase, frequency, etc. of the alternating magnetic field applied to the rotor superconductor from the armature side based on the position detection signal By adjusting the, the superconducting rotating machine can be controlled appropriately and stably.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the superconducting rotary machine by Example 1 of this invention, Comprising: (a), (b) is sectional drawing along the direction orthogonal to the axis | shaft of a rotor, respectively, and an axial direction. It is a schematic diagram showing the alternating magnetic field produced | generated by the energization of the armature coil in Fig.1 (a), and applying to the superconductor of a rotor. FIG. 3 is a schematic explanatory diagram showing a shielding current induced in a state where a magnetic field of FIG. 2 is applied to a flat superconductor, and a Lorentz force due to an interaction between the shielding current and the magnetic field. It is a schematic explanatory drawing showing the rotation operation principle of the superconducting rotary machine shown in FIG. It is a schematic cross section of the superconducting rotating machine according to the second embodiment of the present invention. FIG. 6 is a schematic explanatory diagram illustrating the operation principle of the rotor in FIG. 5. It is a schematic cross section of the superconducting rotor concerning Example 3 of this invention. FIG. 8 is a schematic cross-sectional view of a superconducting rotor that represents a modified example of FIG. 7. It is a schematic block diagram of the superconducting rotor concerning Example 4 of this invention, Comprising: (a) is a top view, (b) is arrow XX sectional drawing of (a). It is a schematic block diagram of the superconducting rotor concerning Example 5 of this invention, Comprising: (a) is a top view, (b) is arrow XX sectional drawing of (a). It is a control system figure of the superconducting rotor concerning Example 6 of the present invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a superconducting rotating machine according to the present invention will be described below based on the examples shown in FIGS.

  First, the basic structure and operating principle of the superconducting rotating machine of the present invention will be described with reference to FIGS. In each figure, 1 is a stator, 2 is an armature coil disposed on the inner periphery of the stator 1, 3 is a rotor, and 4 is a flat superconductor mounted on the rotor 3.

  Here, the armature coil 2 has six coils arranged in parallel along the inner peripheral side of the stator 1 in the same manner as a normal three-phase induction rotating machine, and an electrical phase between adjacent coils. Are shifted by 120 ° and three-phase AC power is supplied to generate an alternating magnetic field (rotating magnetic field) to be applied to the superconductor 4 of the rotor 3 as described later.

  On the other hand, the rotor 3 includes a hollow rotating portion 3a having a cryostat structure and a rotating shaft 3b (an output shaft of a rotating machine), and the rotating shaft 3b is pivotally supported by a stator bracket via a bearing (not shown). . A single flat superconductor 4 is accommodated in the center of the hollow rotating portion 3a in accordance with the axial center O of the rotor. The superconductor 4 is a non-magnetic support member (not shown). ) To be supported by the hollow rotating portion 3a.

  The flat superconductor 4 is made of a high-temperature oxide superconducting material such as yttrium-based (Y-based), and has a wide thin film superconducting shape whose outer contour is rectangular (or an oblong shape similar to a rectangle). Here, D is the width of the superconductor 4 and L is the length in the axial direction. As is well known, this thin film superconductor is a composite in which a superconducting thin film is formed on an intermediate layer on a substrate (normal conducting metal) such as silver or hastelloy as a stabilizer.

  Next, the operating principle of the superconducting rotating machine shown in FIG. 1 will be described. First, a refrigerant such as liquid nitrogen is introduced into the hollow rotating portion 3a of the rotor 3 containing the flat superconductor 4 to cool the superconductor 4 to a superconducting state below the critical temperature, and then disposed on the stator 1. When a three-phase alternating current is applied to the armature coil 2, the alternating magnetic field B (rotating magnetic field) indicated by the illustrated arrow is generated in the space in which the rotor 3 (not shown) is arranged as shown in FIG. A magnetic field B is applied to a flat superconductor 4 (see FIG. 1) disposed on the rotor 3.

  By applying this armature magnetic field B, a shielding current Is is induced in the flat superconductor 4 as shown in FIG. 3 and flows in a loop along the peripheral area of the rectangular superconductor 4. Thereby, an electromagnetic force (Lorentz force) F (F = Is × B × L) as shown in the figure is generated in the flat superconductor 4 due to the interaction between the shielding current Is and the armature magnetic field B. In this case, when the magnetic field B is applied in a direction perpendicular to the main surface of the superconductor 4 as shown in the figure, the electromagnetic force generated in the left region of the superconductor 4 with respect to the axial center O of the rotor. Since the directions of F and the electromagnetic force F generated in the right region are opposite to each other and the electromagnetic forces F cancel each other, the superconductor 4 does not rotate.

  On the other hand, as shown in FIG. 4, when the flat superconductor 4 is inclined at an angle with respect to the direction of the armature magnetic field B, the electromagnetic force F becomes a couple and the superconductor 4 rotates. It rotates around the axis center O. Note that the armature magnetic field B described in FIG. 2 is a rotating magnetic field, and the direction of the magnetic field changes periodically, so that the rotor 3 supporting the superconductor 4 rotates continuously.

  As is apparent from the above description of the structure and operation principle, the superconducting rotating machine of the present invention has a simple structure in which a flat superconductor 4 is simply installed at the center of the hollow rotating portion 3a of the rotor 3, Unlike the squirrel-cage winding disclosed in Document 3, it is not necessary to electrically connect both ends of the rotor bar accommodated in the rotor core slot to the end ring. In addition, a normal conductive metal body with a large Joule heat generation such as a normal conductive lead-shaped winding in Patent Document 3 and a heavy rotor core are not required.

  As a result, the rotating machine can be reduced in size and weight, and the cooling load of the cooling device that keeps the superconductor in a superconducting state can be greatly reduced. In addition, by maintaining the superconductor from the beginning of operation of the rotating machine in a superconducting state at all times, superconducting performed in the process of shifting from startup to steady operation like the superconducting rotating machines of Patent Document 2 and Patent Document 3. It can be operated without critical temperature judgment and control.

  In the illustrated embodiment, a thin and thin thin-film superconductor is used as the flat superconductor 4 in the illustrated embodiment, but the present invention is not limited to this. It is also possible to use a superconductor made of a material. Moreover, it is also possible to form a slit along the rotation axis direction on the plate surface of the flat superconductor as necessary.

  Further, the cooling of the superconductor 4 arranged in the rotor 3 is not limited to the cooling method of the illustrated embodiment. For example, the entire superconducting rotating machine including the armature coil 2 of the stator 1 is cylindrical. The entire superconducting rotating machine may be cooled by heat transfer and convection by flowing a cryogenic refrigerant from the outside through a refrigerant flow pipe provided on the outer peripheral surface of the envelope surrounded by an outer container. In addition to liquid nitrogen, He or Ne gas or liquid can be used as the cryogenic refrigerant.

  Next, a description will be given of a rotating machine configuration of the second embodiment of the present invention in which the output torque of the superconducting rotating machine is enhanced by improving the first embodiment, and the rotating operation thereof with reference to FIGS.

  That is, in this embodiment, the superconductor 4 is laminated and integrated by superimposing a plurality (N pieces) of rectangular thin film superconductors 4-1, 4-2,..., 4-N in a direction perpendicular to the main surface. The laminated superconductor 4 is accommodated in the center of the rotor 3 in accordance with the rotation axis center O as shown in the drawing. Although not shown, the thin film superconductors 4-1, 4-2,..., 4-N electrically insulate between the conductors through an electrical insulating material and flow to each thin film superconductor. The interference of the shielding current Is is avoided.

  As in the first embodiment, the armature magnetic field (rotating magnetic field) B generated by the armature coil 2 of the stator 1 in a state where the laminated superconductor 4 is cooled to a superconducting state below the critical temperature. Is applied to the superconductor 4 of the rotor 3, as shown in FIG. 6, the superconductor 4 has a shielding current Is induced in each of the thin film superconductors 4-1, 4-2,. Due to the interaction with the armature magnetic field B, a Lorentz force F ′ (F ′ = F × N (where N is the number of stacked thin film superconductors)) is generated in the superconductor 4. Here, if the angle formed between the direction in which the armature magnetic field B is applied and the superconductor 4 is θ, the superconductor 4 has a rotational torque T (T = F ′ × cos θ × r (where r is the rotational axis center O). And rotating around the rotation axis O. Thereby, the output torque of the superconducting rotating machine can be increased as compared with the first embodiment in which the flat superconductor 4 is composed of a single sheet. In addition, it can be expected to increase the effective mechanical strength (rigidity) of the laminated superconductor 4 to prevent deformation and breakage of the thin film superconductor due to the centrifugal load of the rotating machine.

  Next, FIG. 7 and FIG. 8 show a third embodiment of the present invention in which the laminated rotor of the second embodiment is further improved.

  That is, in this embodiment, the thin film superconductor 4, 4-2,..., 4-N is stacked on the superconductor 4 in the direction perpendicular to the main surface. A rectangular magnetic material 5 formed in conformity with the outer contour of the superconductor is alternately stacked on each thin film superconductor 4-1, 4-2,. With this configuration, an alternating magnetic field generated by an armature coil (not shown) of the stator is intensively applied to a plurality of thin film superconductors 4-1, 4-2,. Thus, the shielding current Is can be generated effectively.

  In FIG. 7, the magnetic material 5 is interposed between adjacent thin film superconductors, and in FIG. 8, the thin film superconductor is interposed between the magnetic materials 5 contrary to FIG. An equivalent effect can be exhibited.

  Next, FIG. 9A and FIG. 9B show Embodiment 4 of the present invention in which a superconductor having a large area can be configured by combining superconductors having a relatively small area.

  In other words, in order to manufacture a thin-film superconductor having a large area with the current manufacturing technology, it is obvious that the manufacturing cost is high because the manufacturing equipment needs to be enlarged. A further problem is that a technique for making the superconducting characteristics uniform in a large-area thin film superconductor is very difficult. Several manufacturing methods have been put to practical use in the manufacture of thin film superconductors, but the superconducting properties vary greatly depending on the film forming conditions when forming a superconducting layer on a substrate of an orientationally stable material. It is very difficult to manufacture a thin film superconductor with a large area and high quality.

  In order to deal with such a problem, in the embodiment of FIG. 9, the flat superconductor 4 accommodated in the rotor 3 is divided into two rectangular superconductors 4a-1 and 4a-2 which are rectangular and each divided. The superconductors 4a-1 and 4a-2 are juxtaposed in an axially symmetric position with the axial center O of the rotor 2, and both end portions in the direction perpendicular to the dividing line are electrically connected to each other through the connecting conductor 4b. ing.

  When the rotating magnetic field generated by the armature coil 2 is applied to the superconductor 4 having the above-described configuration in the same manner as in the first embodiment, the shielding current induced in the divided superconductors 4a-1 and 4a-2 passes through the connecting conductor 4b. Then, the rotor 3 rotates around the rotation axis O by the rotational force generated in the superconductor 4 due to the interaction between the shield current and the armature magnetic field. Note that the number of divisions of the superconductor 4 is not limited to two and may be divided more than that. Further, the connecting conductor 4b connected across both ends of the divided superconductors 4a-1 and 4a-2 may be a superconducting material or a normal conducting material.

  According to this configuration, a high-output rotating machine can be configured by combining a relatively small area superconductor without using a wide and large area superconductor.

  Next, an application example of the above-described Example 4 is shown in FIG. That is, in the embodiment of FIG. 9, the divided superconductors are arranged side by side with respect to the axial center O of the rotor, whereas in this embodiment, the divided divided superconductors 4a- 1, 4a-2, 4a-3 are arranged side by side along the direction of the rotation axis of the rotor 3 as shown in the figure, and the divided superconductors 4a-1, 4a-2, 4a-3 are connected to each other. The connection is made through the connection conductors 4b arranged at the left and right ends.

  Also in this embodiment, a high output rotating machine can be configured by combining superconductors having a relatively small area as in the fourth embodiment. In the illustrated embodiment, the superconductor 4 is divided into three divided superconductors 4a-1, 4a-2, 4a-3, but the number of divisions is not limited to this.

  Next, the operation system of the superconducting rotating machine of the present invention will be described with reference to FIG. That is, as can be seen from the configuration and operating principle of the superconducting rotating machine described in the previous embodiment, a flat magnetic field (rotating magnetic field) B generated by the armature coil 2 of the stator 1 is accommodated in the rotor 3. In order to rotate the rotor 3 by the rotational force generated by the interaction between the shield current Is flowing through the superconductor 4 and the armature magnetic field B in the state of being applied to the superconductor 4, the superconductor 4 and the armature magnetic field It is necessary to maintain a certain angle θ (see FIGS. 4 and 6) between them, and in an operating state in which a load is applied to the rotor 3, the appropriate angle θ also changes depending on the magnitude of the load.

  Therefore, in the operation system shown in FIG. 11, the rotor angular position detector 6 is disposed opposite to the shaft end opposite to the operation side with respect to the drive shaft 3 b of the rotor 3. The detection signal is output to the armature coil power control device 7 to control the power supplied to the armature coil 2 via the armature coil power supply device (inverter) 8.

  Thereby, the rotation angle of the flat superconductor 4 arranged on the rotor 3 during the start-up and operation of the superconducting rotating machine is detected, and the strength of the rotating magnetic field generated by energization of the armature coil 2 based on this detection signal, It becomes possible to operate the rotating machine stably by controlling the phase, frequency, rotation direction, and the like. By utilizing this control method, the superconducting rotating machine can be used as a brake (brake) in addition to the electric motor.

DESCRIPTION OF SYMBOLS 1 Stator 2 Armature coil 3 Rotor 3a Hollow rotating part 3b Rotating shaft 4 Flat superconductor 4a-1 to 4a-3 Split superconductor 4b Connection conductor 5 Magnetic material 6 Rotor angular position detector 7 Armature coil Power control device 8 Armature coil power supply device

Claims (8)

  A superconducting rotating machine including an armature coil provided on a stator side and a superconducting rotor having a flat superconductor, and applying a magnetic field from the armature coil to the flat superconductor. A superconducting rotating machine characterized in that a rotating force is generated in the superconducting rotor based on an electromagnetic force generated by a shielding current induced by the magnetic field and the magnetic field.   The flat plate-shaped superconductor is composed of at least one thin film superconductor whose outer contour is rectangular, and the thin film superconductor is arranged in accordance with the axial center of the rotor. The superconducting rotating machine described.   The superconducting rotating machine according to claim 1 or 2, wherein the flat superconductor is composed of a composite of a superconducting material and a normal conducting material as a stabilizing material.   The flat plate-like superconductor is composed of a plurality of rectangular superconductors, and the plurality of rectangular superconductors are arranged so as to overlap each other in a direction perpendicular to the main surface of the superconductor. A superconducting rotating machine according to any one of the above.   The superconducting rotating machine according to claim 4, wherein the plurality of rectangular superconductors arranged in an overlapping manner include an electrical insulating material between the superconductors.   The superconducting rotating machine according to claim 4, wherein the plurality of superposed rectangular superconductors are alternately superposed with a rectangular magnetic material.   7. The flat superconductor is divided into a plurality of parts, and the divided superconductor division lines are electrically connected to the ends in the perpendicular direction. The superconducting rotating machine according to any one of the items.   A rotation angle position detector provided at a shaft end of the superconducting rotor, and a control device for controlling the angle of the magnetic field generated by the armature coil based on the rotation angle of the rotor detected by the detector. The superconducting rotating machine according to any one of claims 1 to 7, wherein

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