JPH08236369A - Power generating system of taking advantage of quenching phenomenon in superconduction - Google Patents

Abstract

PURPOSE: To obtain a generator which does not require the supply of energy from outside and discharges no harmful exhaust. CONSTITUTION: A variable magnetic field source 3, a normal magnetic field source 2, a superconductor 1, and an induction coil 5 are linearly arranged. When the sum of the magnetic fields of the magnetic field sources 2 and 3 is smaller than the critical magnetic field of the superconductor 1, the superconductor 1 shields the magnetic flux owing to the Meissner effect. When the sum of the magnetic fields of the magnetic field sources 2 and 3 becomes larger than the critical magnetic field of the superconductor 1 due to a very small increase in the magnetic field of the variable magnetic field source 3, the Meissner effect becomes ineffective, and the magnetic flux penetrates quickly through the superconductor 1 and the induction coil 5. An electromotive force is induced in the induction coil 5 owing to electromagnetic induction caused by a change in the magnetic field.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation system which does not require huge equipment and does not emit harmful exhaust gas.

[0002]

2. Description of the Related Art The current general power generation system utilizes electromagnetic induction by a rotating (fluctuation) magnetic field. Therefore, the smaller the energy required to change the magnetic field, the better the power generation efficiency. However, in the current power generation method, the energy required for the fluctuation of the magnetic field is always larger than the power generation energy.

[0003]

The problem to be solved by the present invention is to utilize the quench phenomenon of a superconductor to reduce the energy required for the fluctuation of the magnetic field to be smaller than the energy generated by power generation.

[0004]

The means will be described with reference to the drawings.

As shown in FIG. 1, a cylindrical first-type superconductor 1, a constant magnetic field source 2, a fluctuating magnetic field source 3, and an induction coil 5 are linearly arranged. Let H _{C be} the critical magnetic field of the superconductor 1. The normal magnetic field source 2 is a permanent magnet or a superconducting magnet, and its magnetic field is now H ₂ =
0.95H _C. The fluctuating magnetic field source 3 is an electromagnet to which an AC power source 4 is connected. The magnetic field H ₃ is

2 is a range from 0 to ± when the direction of the dotted arrow in FIG.
It varies between 0 and 1H _C. The induction coil 5 corresponds to an armature coil that takes out an output from a normal generator. The extracted output is consumed by the load resistance 6. The dotted arrow in the figure is the magnetic field line, and the actual battle arrow is the current J.

[0005]

The magnetic field H _{3 of the} fluctuating magnetic field source is
The superconductor 1 is in a superconducting state between 0,1H _C and + 0,05H _C. for that reason

FIG. 1 shows the normal magnetic field source 2 by the Meissner effect as shown in FIG.
The magnetic field received by the induction coil 5 is 0 because it shields the magnetic flux. When H ₃ exceeds +0.05 H _C , the magnetic field (H ₂ + H ₃ ) received by the superconductor 1 exceeds H _C , and the superconductor 1 rapidly enters the normal conducting state. as a result,

As shown in FIG. 2, the magnetic fluxes of the constant magnetic field source 2 and the fluctuating magnetic field source 3 penetrate the induction coil 5 and the current J flows in the induction coil 5. When the magnetic field of the fluctuating magnetic field source 3 decreases from the maximum value + 0,1H _C to + 0,05H _C or less, the Meissner effect appears again in the superconductor 1 and the magnetic fluxes of the ordinary magnetic field source 2 and the fluctuating magnetic field source 3 Shielded. At this time, the induction coil 5

FIG. 2 shows an electric current flowing in the opposite direction.

[0006]

【Example】

It is practical to wind the magnetic field source 2 around the superconductor 1 while insulating it as shown in FIG. At that time, the fluctuating magnetic field source 3,
If either or both of the induction coils 5 can be wound at the same time, the power generation equipment can be further downsized. Also,

FIG. 1 shows that the variable magnetic field source 3 is not necessary if the current of the superconductor 1 in which the shield current flows can be directly increased or decreased. Further, since the second type superconductor has a high critical magnetic field, if a second type superconductor is developed in which the upper critical magnetic field and the lower critical magnetic field are very close to each other in the future, the electromotive force will be larger.

[0007]

【The invention's effect】

[Fig. 2] When the electric current J is generated in the induction coil 5 as shown in Fig. 2, that is, when the electric power that can be used by us is taken out, the electric power required for the fluctuating magnetic field source 3 is the fluctuation of the magnetic field of 0 → ± 0, 1H _C. Is required. By electromagnetic induction when doing. Therefore, assuming that the electric power that can be obtained by the induction coil 5 is 100, the electric power required for the variable magnetic field source 3 will be 10. Then, when 10 electric powers are recovered from the induced electromotive force of 100 to the fluctuating magnetic field source 3, the remaining 90 is energy that can be used as an output. Even if the circuit loss and the power required for cooling are taken into consideration, 80
Energy will be available as output from the load resistor 6. Actually, considering how much electric power can be obtained in the case of niobium which is a first-type superconductor as a material of the superconductor 1, the critical magnetic field is 0,2 Tesla. On the other hand, the normal superconducting generator currently prototyped is said to have an output of 70,000 kw with a superconducting electromagnet of 5 Tesla. Therefore, a simple comparison shows that the generator of the present invention has an output of about 2200 kw. Become. From 100,000 kW to 10
Compared to the existing generator of 0,000 kW class, the output is small,
A single generator does not provide a large-scale power source. However, the advantage of not requiring external energy supply and the need for large-scale equipment such as dams, steam generators, turbines, etc. would be more than enough to compensate for the drawback of low output.

[Brief description of drawings]

FIG. 1 is a side view when a magnetic field received by a superconductor (1) is smaller than its critical magnetic field.

FIG. 2 is a side view when the magnetic field received by the superconductor (2) is smaller than its critical magnetic field.

FIG. 3 shows the structure of the present invention.

[Figure 1]

FIG. 2 is a side view showing that it can be made more compact.

[Explanation of symbols]

 1 is a superconductor 2 is a constant magnetic field source 3 is a fluctuating magnetic field source 4 is an AC power source 5 is an induction coil 6 is a load resistance

Claims (2)

[Claims] 1. A first-class superconductor, or a second-class superconductor in which an upper critical magnetic field and a lower critical magnetic field are extremely close to each other,
A sudden large change in the external magnetic field and the magnetic field of the superconductor (quenching phenomenon) at the time of transition from the superconducting state to the normal conducting state by the increase or decrease of a minute magnetic field from the outside or itself, or vice versa. The magnetic field fluctuation method used. 2. A power generation method using the magnetic field fluctuation method according to claim 1.