KR102112045B1 - High Temperature Superconducting Rotating Machine with Active Contacless Dual Excitation Device Using Radial and Axial-Flux Swithcing and it's Performance Evaluation Device - Google Patents

Abstract

The present invention relates to a high temperature superconducting rotating machine with a contactless excitation device actively controlled by generation of dual radial/axial magnetic fields and a performance evaluation apparatus using the same. According to the present invention, when a time-varying magnetic flux (the direction and intensity of charging current are varied in accordance with the direction, intensity, and speed of the time-varying magnetic flux supplied to a flux pump header) is supplied to the flux pump header, which is a contactless field excitation device, to charge (or discharge) current in a high temperature superconducting coil disposed on a rotor core side, a first flux pump rotor (or/and a second flux pump rotor) rotated by being linked with a first motor (or/and a second motor) is disposed on the outside (diametric or axial direction) of the flux pump header, thereby flexibly adjusting relative motion, such as direction, intensity, speed, and the like, of the time-varying magnetic flux supplied to the flux pump header. Accordingly, the charging current for the high temperature superconducting coil can be actively controlled, thereby providing a fine range of operation current or realizing fine adjustment and precise control. At the same time, the same evaluation environment as a real use environment in which the rotating machine applying the high temperature superconducting coil, such that performance evaluation of the high temperature superconducting coil can be realized, thereby increasing reliability. Moreover, the present invention provides advantage of selectively charging and discharging the current for the high temperature superconducting coil excited by the flux pump in a contactless mode and controlling fluctuation of a current level in accordance with load variance in initial charging and current compensation in reverse rotation of the rotating machine.

Description

High Temperature Superconducting Rotating Machine with Active Contacless Dual Excitation Device Using Radial and Axial-Flux Swithcing and it's Performance Evaluation Device}

The present invention is provided on the rotor core side by supplying a time-varying flux to the flux pump header, which is a non-contact field excitation excitation device (the direction and magnitude of the current to be charged changes depending on the direction and intensity and speed of the time-varying flux supplied to the flux pump header). In order to charge (or discharge) the current in a non-contact manner to the high-temperature superconducting coil, the first (or / and the second prime mover) rotating in conjunction with a first prime mover (or radial and axial) outside the flux pump header A flux pump rotor (or / and a second flux pump rotor) is provided to flexibly control relative motion such as the direction, intensity and speed of the time-varying flux supplied to the flux pump header, which is for a high-temperature superconducting coil. By allowing the charging current to be actively controlled, it is possible to have a fine range of operating current or to fine-tune and precisely control At the same time, it provides the same evaluation environment as the actual use environment in which a rotor with a high-temperature superconducting coil is applied, so it is possible to evaluate the performance of the high-temperature superconducting coil. The present invention relates to a high-temperature superconducting rotator equipped with a non-contact field excitation device and a performance evaluation device using the high-temperature superconducting rotator.

Accordingly, the present invention has the advantage of selectively charging and discharging the current for the high-temperature superconducting coil that is non-contactly excited by the flux pump, and increases or decreases the amount of current due to load fluctuation during initial charging, and controls current compensation during reverse rotation of the rotor. There are features.

In order to compensate for the shortcomings of the conventional high-temperature superconducting rotator system that uses a contact excitation method (DC power supply, slip ring, brush, metal current lead wire) for excitation of the high-temperature superconducting field coil, the applicant of the present application stated, The applied high-temperature superconducting rotator (patent registration No. 10-1766684 / hereinafter referred to as 'prior patent') was devised and patented.

 That is, the prior patents have several technical disadvantages of the contact excitation device (increased cooling load due to the occurrence of heat load, deterioration of thermal stability of the high-temperature superconducting coil, deterioration of rotator system efficiency, increased maintenance due to mechanical friction, and reduced economic efficiency, etc.). It is possible to solve.

However, this prior patent is a principle of generating and charging current in a non-contact manner by using the relative rotational speed of the rotor of the high-temperature superconducting coil, and is passive in the operation of the rotator and has a limited range of control.

In other words, the prior patent has a problem in that it is difficult to refine the operation range due to difficulty in controlling the direction, intensity, speed, and charge amount of the time-varying flux of the non-contact excitation device for charging the superconducting coil. Becomes passive and the control range is narrowed.

In addition, in the case of the prior patent, deliberate rotation of the rotor is required during the initial current charging, and economic efficiency according to the addition of the system configuration is reduced, and efficiency is also reduced in repetitive operation.

In addition, the prior patent has a disadvantage that the current charged in the high-temperature superconducting field coil is discharged because the time-varying magnetic field cross-linking direction with the flux pump is reversed, especially when the motor requiring rotation is rotated, and countermeasures to compensate for this are also passive. to be.

1. Republic of Korea Registered Patent No. 10-1766684 (2017.08.03. Registered)

The present invention is to solve the above-mentioned problems, the technical point of which is supplying a time-varying flux to the flux pump header, which is a non-contact field excitation device, charging (or discharging) the current in a non-contact manner to the high-temperature superconducting coil provided on the rotor core side. In order to make it possible, a first flux pump rotor (or / and a second flux pump rotor) rotating in conjunction with a first prime mover (or / and a second prime mover) is located outside (in the radial or axial direction) of the flux pump header. It is an object of the present invention to provide a fluid control of a relative motion such as a direction, intensity, and speed of a time-varying flux supplied to the flux pump header.

In the present invention, the charging current for the high-temperature superconducting coil can be actively controlled, so that it can have a fine range of operating current or can be fine-tuned and precisely controlled, and at the same time, it is actually used for a rotor with a high-temperature superconducting coil to be used. The object is to provide a high reliability because the performance evaluation of the high temperature superconducting coil is possible by providing the same evaluation environment as the environment.

Accordingly, the present invention has the advantage of selectively charging and discharging the current for the high-temperature superconducting coil that is non-contactly excited by the flux pump, and increases or decreases the amount of current according to the load fluctuation during initial charging, and controls current compensation when the rotor rotates reversely. The purpose is to provide.

In order to achieve this object, the present invention allows the rotor core 3 combined with the toroidal type flux pump header 6 to be built in the refrigerant cylinder 4, but the rotor core connected to the flux pump header 6 ( The rotational axis of 3) is formed to be the same, and the high-temperature superconducting coil 2 and the high-temperature superconducting wire are respectively wound in the outer circumferential directions of the rotor core 3 and the flux pump header 6, but the rotor core ( In the circumferential direction of 3), a terminal block 14 is formed to apply a current to the high-temperature superconducting coil 2, and an upper plate 13 is formed on an upper portion of the refrigerant cylinder 4, but the upper plate 13 ) Is formed to be provided with a refrigerant port 11 and a feed-through 12 for signal line extraction, and a first flux having a first permanent magnet 8 in an outer circumferential direction corresponding to the flux pump header 6 To be provided with a pump rotor (7), the first flux pump The rotor 7 is formed to rotate through the power of the driving unit 18 connected to the first prime mover 19.

Thus, the flux pump header 6 is such that the second flux pump rotor 9 is provided with a second permanent magnet 10 in the lower axial direction, the second flux pump rotor 9 is a second prime mover It is formed to rotate by receiving the power from the rotating plate (21) connected to (20).

On the other hand, the present invention, as an embodiment, to be provided with an electromagnet stator type, the refrigerant cylinder 4 is to be arranged so that the stator core 15 with an armature winding 17 in the circumferential direction of the outer circumferential surface, the stator core 15 is formed so that the armature winding lead-out terminal 16 is provided.

In addition, the present invention as another embodiment, to be provided with a rotating permanent magnet stator type, the refrigerant cylinder 4 is to be arranged so that the rotating permanent magnet stator 15-1 in the circumferential direction of the outer circumferential surface, the rotating type The permanent magnet stator 15-1 is formed to be provided on the fixed support 23 having an axial rotation structure, and the fixed support 23 is formed to rotate by an external power source 24.

At this time, the high-temperature superconducting rotator is preferably formed in the vertical direction in the axial direction standing up from the ground or in the same horizontal direction as the ground.

As described above, the present invention has a first flux pump rotor (or / and a second flux pump rotor) rotating in conjunction with a first prime mover (or / and a second prime mover) on the outside (radial or axial) of the flux pump header. It is provided so that the relative motion such as the direction, intensity, and speed of the time-varying flux supplied to the flux pump header can be flexibly controlled, which enables active control of the charging current for the high-temperature superconducting coil, thereby providing detailed operation current. It has the effect of being able to have a range or fine-tuning and precisely controlling.

In addition, the present invention has the effect of providing high evaluation superconducting coil performance evaluation reliability by providing the same evaluation environment as the actual use environment to be used with a high-temperature superconducting coil.

In addition, the present invention has the advantage of selectively charging and discharging the current for the high-temperature superconducting coil that is non-contactly excited by the flux pump, and increases or decreases the amount of current due to load fluctuation during initial charging, and controls current compensation during reverse rotation of the rotor. There is a possible effect.

1 is an exemplary view showing a high-temperature superconducting rotator equipped with a non-contact excitation device capable of active control by generating a double magnetic field in the axial direction according to the present invention,
Figure 2 is an exemplary view showing another embodiment of Figure 1,
Figure 3 is another embodiment of Figure 1, an exemplary view showing the electromagnet stator type of the horizontal type,
Figure 4 is another embodiment of Figure 3, an exemplary view showing a rotating permanent magnet stator type of the horizontal type,
FIG. 5 is an explanatory diagram showing a charging and discharging operation mechanism of a high-temperature superconducting rotator equipped with a non-contact excitation device capable of active control by generating a double magnetic field in the axial direction.

Next, the present invention will be described in more detail with reference to the accompanying drawings.

1 to 4, the present invention is formed such that the rotor core 3 combined with the toroidal type flux pump header 6 is embedded in the refrigerant cylinder 4.

At this time, the rotation axis of the rotor core 3 connected to the flux pump header 6 is formed to be the same.

Accordingly, the high-temperature superconducting coil 2 is formed to be wound in the outer circumferential direction of the rotor core 3.

At this time, in the outer circumferential direction of the flux pump header 6, the high-temperature superconducting wire is formed to be wound in a trojan shape.

Accordingly, a terminal block 14 is formed on the upper one side of the circumferential direction of the rotor core 3 to apply a current to the high-temperature superconducting coil 2.

Meanwhile, the upper plate 13 is formed on the upper portion of the refrigerant cylinder 4, but the upper plate 13 is formed so as to be provided with a refrigerant port 11 and a feed-through 12 for signal line extraction.

Accordingly, a first flux pump rotor 7 having a first permanent magnet 8 is formed in an outer circumferential direction corresponding to the flux pump header 6.

At this time, the first flux pump rotor 7 is formed to rotate through the power of the driving unit 18 connected to the first prime mover 19.

Thus, the flux pump header 6 is an optional embodiment, and is formed such that the second flux pump rotor 9 with the second permanent magnet 10 is disposed in the lower axial direction.

At this time, the second flux pump rotor 9 is formed to rotate by receiving power from the rotating plate 21 connected to the second prime mover 20.

On the other hand, the present invention, as an embodiment, to be provided with an electromagnet stator type, the refrigerant cylinder 4 is to be arranged so that the stator core 15 with an armature winding 17 in the circumferential direction of the outer circumferential surface, the stator core 15 is formed so that the armature winding lead-out terminal 16 is provided.

In addition, the present invention is another embodiment, to be provided with a rotating permanent magnet stator type, the refrigerant cylinder 4 is formed such that the rotating permanent magnet stator 15-1 is disposed in the circumferential direction of the outer circumferential surface.

At this time, the rotating permanent magnet stator 15-1 is formed to be provided on the fixed support 23 of the axial rotation structure, and the fixed support 23 is formed to rotate by an external power source 24.

Thus, the fixed support is a hollow cylindrical body, it is preferable that the outer peripheral surface is formed with a rotating means (gear difference, chain, belt, etc.) corresponding to the drive plate 25 of the external power source.

At this time, the high-temperature superconducting rotator is preferably formed in the vertical direction in the axial direction standing up from the ground or in the same horizontal direction as the ground.

That is, the high-temperature superconducting rotator of the present invention may be a vertically standing type as shown in FIGS. 1 to 2, or may be configured in a horizontal type as shown in FIGS. 3 to 4.

Accordingly, when the high-temperature superconducting rotator is horizontal, the support fixing shaft 30 is coupled to the upper plate 13 and the lower plate 13-1 formed at the axial end of the refrigerant cylinder, but the support fixing shaft ( 30) is formed to be fixed to the high-temperature superconducting rotator assembly horizontally while being fixed to the inner wall surface of the partition wall 41 of the '∪' shaped fixing frame 40.

At this time, a through hole is formed in the partition wall 41 of the fixed frame so that the drive shaft of the second prime mover connected to the refrigerant port connecting pipe and the second flux pump rotor is formed without interference.

In addition, the refrigerant port 11 is provided with an insulating tube 1 at an end side inserted in the refrigerant cylinder to form cooling of the high-temperature superconducting coil inside the refrigerant cylinder.

The details are as follows.

First, by rotating the permanent magnet provided on the outside of the flux pump header, the time-varying flux is supplied to charge the current in the high-temperature superconducting coil located in the circumferential direction of the rotor core.

As the direction of the current to be charged changes according to the direction of the time-varying flux supplied to the flux pump header, the size of the current to be charged changes according to the strength and speed of the time-varying flux.

At this time, the first flux pump rotor is formed in such a way that the relative motion speed is controlled by the first prime mover while being linked in the radial direction (radial direction) with respect to the flux pump header, thereby adjusting the direction, intensity, and speed of the time-varying flux.

In addition, the second flux pump rotor is also formed to be able to control the relative motion speed of the second prime mover while controlling in the axial direction (same axis) with respect to the flux pump header, thereby adjusting the direction, intensity and speed of the time-varying flux.

Accordingly, the first flux pump rotor and the second flux pump rotor may enable simultaneous driving of the first and second prime movers simultaneously.

Therefore, the present invention enables active control of the charging current in the high-temperature superconducting coil, and thus can have a range of detailed operating current, so that the size of the current can be increased or decreased due to initial charging and load fluctuation, and current compensation can be controlled during reverse rotation. There is this.

The following describes the charging and discharging operation mechanism of the high-temperature superconducting rotator according to the present invention. (See Fig. 5)

1. Φ ₁ refers to the time-varying magnetic field that is interlinked with the high-temperature superconducting wire wound on the flux pump head by rotating the permanent magnet located in the radial flux pump rotor by the prime mover 1 like the radial flux pump rotor, and Φ ₂ is the axial direction The permanent magnet located in the flux pump rotor is rotated by the prime mover 2 like the axial flux pump rotor to mean a time-varying magnetic field that is connected to the high-temperature superconducting wire wound around the flux pump head.

2. R _d1 , R _d2 and V _dc1 and V _dc2 mean the dynamic resistance and DC average voltage induced in the high-temperature superconducting wire wound on the flux pump head by Φ ₁ and Φ ₂ , respectively.

3. R _j1 and R _j2 refer to the contact resistance generated by the contact between the high-temperature superconducting wire wound on the flux pump head and the high-temperature superconducting coil wound on the rotor core.

4. L _c means the inductance of the high-temperature superconducting coil wound around the rotor core.

5. When rotating the radial flux pump rotor with prime mover 1 as the power source during initial start-up, a time-varying magnetic field Φ ₁ is generated, and the dynamic resistance R _{d1 of the} circuit and the DC average voltage V _dc1 are induced. Their size is determined by the size of the time-varying magnetic field (the strength of the permanent magnet) and the speed (rotational speed of the radial flux pump rotor).

6. According to the driving situation, if it is judged that the current charging by rotation of the radial flux pump rotor is insufficient or its speed is slow, the axial flux pump rotor is rotated in the radial direction using the prime mover 2 as the power source as shown in the upper left of FIG. By rotating in the same direction as the rotation direction of the flux pump rotor, a time-varying magnetic field F ₂ is generated to induce the dynamic resistance R _d2 of the circuit and the DC average voltage V _dc2 .

The magnitude of the DC voltage source applied to the high-temperature superconducting coil L _c located in the rotor core is increased by _adding the magnitudes of the DC average voltages V _dc1 and V _dc2 induced to the circuit by the superposition principle, and finally the magnitude of the current flowing through the circuit Increases.

Conversely, if it is determined that the current charging is excessive or the speed is high, the DC average voltages V _dc1 and V induced in the circuit by the principle of superposition by rotating the rotation direction of the prime mover 2 as opposed to the prime mover 1 as shown in the lower left of FIG. The size of the DC voltage source applied to the high-temperature superconducting coil L _c is reduced by the _difference of the size of _dc2 , and finally, the size of the current flowing through the entire circuit is reduced.

7. Reverse charge and discharge only change the rotation direction in the forward direction, and the principle is the same.

In the operation mechanism of the above-mentioned embodiment, the current flow of the high-temperature superconducting coil excited by the non-contact excitation device is monitored in real time to determine the rotational direction to respond to the actual operating environment of the rotator (initial starting, load fluctuation, rotation direction change, etc.) By performing feedback control (sequence control for each corresponding mode) of the double flux pump device, it is possible to improve the operational reliability of the high-temperature superconducting rotator with a non-contact field exciter.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be carried out by anyone who has ordinary knowledge in the art to which the subject design pertains without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

1 ... Insulation tube 2 ... High temperature superconducting coil
3 ... rotor core 4 ... refrigerant tube
5 ... stator frame 6 ... flux pump header
7 ... 1st flux pump rotor 8 ... 1st permanent magnet
9 ... 2nd flux pump rotor 10 ... 2nd permanent magnet
11 ... Refrigerant port 12 ... Feed-through
13 ... Top plate 14 ... Terminal block
15 ... stator core 15-1 ... rotating permanent magnet stator
16 ... Armature winding take-off terminal 17 ... Armature winding
18 ... drive unit 19 ... first prime mover
20 ... second prime mover 23 ... fixed support
24 ... external power source

Claims (5)

The rotor core 3 combined with the toroidal type flux pump header 6 is built in the refrigerant cylinder 4, but the rotational axis of the rotor core 3 connected to the flux pump header 6 is formed to be the same. In the outer circumferential direction of the rotor core 3 and the flux pump header 6, the high-temperature superconducting coil 2 and the high-temperature superconducting wire are respectively wound, but the upper one side of the circumferential direction of the rotor core 3 is A terminal block 14 is formed to apply a current to the high-temperature superconducting coil 2, and an upper plate 13 is formed on an upper portion of the refrigerant cylinder 4, but a refrigerant port 11 and a signal line are provided on the upper plate 13 It is formed to be provided with a feed-through 12 for withdrawal, and a first flux pump rotor 7 having a first permanent magnet 8 is provided in an outer circumferential direction corresponding to the flux pump header 6, , The first flux pump rotor 7 is a driving unit connected to the first prime mover 19 ( In order to rotate through the power of 18),
The flux pump header 6 is such that the second flux pump rotor 9 is provided with a second permanent magnet 10 in the lower axial direction, the second flux pump rotor 9 is a second prime mover 20 ) High-temperature superconducting rotator equipped with a non-contact excitation device capable of active control by generating a double magnetic field in the axial direction, characterized in that it rotates by receiving power from the rotating plate (21) connected. delete delete The rotor core 3 combined with the toroidal type flux pump header 6 is built in the refrigerant cylinder 4, but the rotational axis of the rotor core 3 connected to the flux pump header 6 is formed to be the same. In the outer circumferential direction of the rotor core 3 and the flux pump header 6, the high-temperature superconducting coil 2 and the high-temperature superconducting wire are respectively wound, but the upper one side of the circumferential direction of the rotor core 3 is A terminal block 14 is formed to apply a current to the high-temperature superconducting coil 2, and an upper plate 13 is formed on an upper portion of the refrigerant cylinder 4, but a refrigerant port 11 and a signal line are provided on the upper plate 13 It is formed to be provided with a feed-through 12 for withdrawal, and a first flux pump rotor 7 having a first permanent magnet 8 is provided in an outer circumferential direction corresponding to the flux pump header 6, , The first flux pump rotor 7 is a driving unit connected to the first prime mover 19 ( In order to rotate through the power of 18),
The refrigerant cylinder 4 is such that the rotating permanent magnet stator 15-1 is disposed in the circumferential direction of the outer circumferential surface, and the rotating permanent magnet stator 15-1 is provided on the fixed support 23 of the axial rotation structure. It is formed, the fixed support 23 is a high-temperature superconducting rotator equipped with a non-contact excitation device capable of active control by generating a double magnetic field in the axial direction, characterized in that to rotate by an external power source (24).
delete

Images