JPS58107076A - Power supply device - Google Patents

Abstract

PURPOSE:To correct the difference of form size on the manufacture of a plurality of vessel coils, and to shape an excellent magnetic field by a method wherein the coils are connected in series, one side of resistors or reactors changing the value of the vessel coils is connected in parallel with one part of the coils, and these resistors or reactors are connected to one power supply. CONSTITUTION:The coils 2, 3 form the magnetic fields phi2, phi3 around a vacuum vessel 1 by supplying the coils 2, 3 with currents from the power supply 4, and plasma is confined at a position required in the vacuum vessel 1 by the magnetic fields. In this case, the connecting terminals of the coils 2, 3 are each made 2a, 2b and 3a, 3b, and the variable resistors 6, 7 are severally connected among the terminals 2a, 2b and 3a, 3b. Accordingly, the power supply can be shared even when distances among the coils are separated because the same currents can be flowed through a plurality of the coils. The difference of form size on the manufacture of the coils 2, 3 can be corrected by changing the resistance value of the resistors 6, 7 when difference is generated between the intensities phi2, phi3 of the magnetic fields due to the difference of the form size even if the same currents are flowed.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a power supply device for confining plasma, such as a d-fusion experimental device.

Technical Background of the Invention Fig. 1C; in which 1 is a part of a vacuum vessel for confining plasma, 2 and 3 are parts of a nine magnetic field forming coil with a vacuum volume tilt=41, and 4 is a coil 2°. 36; DC power source that sends current; 5 is a connecting conductor;

FIG. 1 shows an example of the function of a coil to confine plasma. By supplying current to the coil 2.3+ from the power supply 4 (;, the coil 2.3 applies magnetic fields φ, φ1 around the vacuum vessel l, and these magnetic fields φ, φa (2. Required position C inside 1; it is intended to be confined.

It is common for a plurality of such coils to be wound around a vacuum vessel, in which case these coils (with corresponding power supply and connection conductors).

Figure 1 shows a part of the system extracted.

s1 Figure 1 = Coils 2.3 and 5 are not necessarily close to each other, and the connection terminals of coils 2 and 3 are connected to 2aa2
b, 3a, and 3b, the terminal 2 shown in the figure (2)
b and 3atii! ! The connecting conductor 5 to be inserted may be quite long.

In such a system 1, the ninth point C to confine the plasma is the required magnetic field strength φ, and the φ island is the installation position a of the coil 2゜3. The strength of the magnetic field φ嘗 and φhata are mainly determined by the manufacturing dimensions of the coils 2 and 3 and the flowing current, but the 1kth
In configuration A, the flowing currents are equal because they form an l loop.This has the characteristic that two or more coils flow through two or more coils, and furthermore, the C coils are spaced apart. It also has the economic efficiency of sharing power sources.

Background Art Problem On the other hand, due to the difference in the manufacturing shape and dimensions of the coil 2.3, the strength of the magnetic field φ1. If φ11=difference occurs, it will be difficult to correct it with the configuration shown in FIG. Coil 2 # 3 Connect 5 separate power supplies to each and control the current to flow, the strength of the magnetic field φ snow, φ
It is possible to make sk equal to each other, but in this case, the reliability, reliability, and ease of control due to the above-mentioned one-loop current, and the economical efficiency of sharing the power supply, etc., will be impaired. ;Become.

Purpose of the Invention The present invention makes it possible to correct the difference in the manufacturing shape and dimensions of the coil without impairing the good characteristics of the prior art (Loop 1LH1 <=) as described above. The present invention aims to provide an economically efficient ml power supply device that enables magnetic field formation and good plasma confinement.

Summary of the invention Vacuum container) - A power supply device that generates a magnetic field by flowing a plurality of wound container coils (2"4 currents), in which a plurality of container coils are connected in series and a part or part of these container coils is connected in series. It is a DC power supply device in which a variable impedance device is connected in parallel to all the coils, and these are connected in one electric knee, and a correction coil equipped with a C2 variable impedance device is further connected to some or all of the container coils. It is a Marugame Gen device.

Embodiment of the Invention Figure 2 shows an embodiment of the invention. In FIG. 2, 62, 1.2.3.4.5 are the same as in FIG. 1, so their explanation will be omitted. Connect the connection terminals of coils 2 and 3 to 2a, respectively.
, 2b and 3m, 3b and resistor 6.7, respectively.
a#2b question and 3rd body, 3b between -2 connect. Resistance -6
and 7 are the resistors whose resistance values can be changed. Although not shown, if necessary, a switch may be provided at one end of the switch so that it can be disconnected from the circuit.

21st i! If the resistance values of resistors 6 and 7 are made sufficiently large at Jl2, or if a switch (not shown) is opened, Is1
Since it can be considered to be equivalent to the enclosure configuration shown in the figure, even the enclosure configuration shown in #I2 has the feature that the same current flows through multiple coils, making it economical to share the power source even if the coils are far apart. have. On the other hand, due to the difference in the manufacturing shape and dimensions of the coils 2e and 3, even when the same electric current m is applied, the magnetic field strength φ1
．． If a difference occurs in the φ field, C2 can change the resistance values of the resistors 6 and 7 in order to correct the difference. φ snow due to the difference in manufacturing shape and dimensions of coil 2.3, φ
The difference of 1 is generally the coil 2 * 3E - flowing it
Since it can be corrected by changing g by a small amount relative to Coil 2.31: Each coil is nine, but it is clear that only one of the coils may be provided.Also, the number of coils is not limited to two.

Furthermore, FIG. 3 shows another embodiment of the present invention.

#I3 Figure C; In, 8 and 10 are resistors, and 9 and 11 are magnetic field forming coils. The rest is the same as in Figure 2. @Resistors 8 and 1O can change their resistance values. Magnetic field forming coils 9 and 11 are close to coils 2 and 3, respectively, and coil 9 is close to coil 2. 3, the coil 9 and the resistor 8, and the coil 11 and the resistor 10 are connected in series C2, and they are connected between the connecting terminals 2m and 2b of the coil and between the connecting terminals 2b and 3m.
, 3b to 16=connect respectively.

In Fig. 3, the resistance values of the resistors 6 and 7 are changed appropriately (from the power source 4)'@ when the current is applied, the strength of the magnetic field created by the coil 2.3 is φ2. 0 and C2, resistor 8 with almost the same φ1. Is the resistance value of lO appropriate? By varying C: j), magnetic fields φ and φi are formed in the coils 9 and 11. This coil 9 and 1
1 is arranged as a correction coil, and the generated magnetic fields φ and φ are used for correction of the magnetic fields φ electric and φ produced by the coils 2 and 3. From 1 2, the manufacturing shape of the coils 2 and 3. Errors caused by shape deformation that cannot be corrected by current increase alone among dimensional differences (for example, asymmetrical errors in the cross-sectional plane of the vacuum vessel 1) are corrected. In this case as well, either one of the correction coils 2 and 3 (only two may be provided in correspondence with each other).

In FIGS. 2 and 3, the resistor 6.7.8110 is not limited to a single resistor, and the same effect can be obtained with a variable reactor or a combination of a variable reactor and a variable resistor. In addition, the resistors 6.7°8 and 10 are not necessarily all necessary, and only the minimum necessary is sufficient. It is possible to correct differences in the manufacturing shape and dimensions of the coil without damaging it (-Re, realizing good magnetic field formation,
As a result, good plasma confinement can be achieved. Sara 1
: Since the number of power supplies can be minimized and can be constructed using low-cost items such as resistors and reactors, it is possible to realize a power supply device that is also highly economical.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of a conventional power supply circuit, FIG. 2 is a circuit diagram showing one embodiment of the present invention, and FIG. 3 is a circuit diagram showing another embodiment of the present invention. 2.3... Container coil 4... Power supply L7*L1
0-...Resistor 9,11...Correction coil (73
17) Agent: Kensuke Chika, patent attorney (and 1 others)
Figure 1 Figure 2

Claims (2)

[Claims] (1) Vacuum container 6; nine wrapped container coils 6
In the power supply ￥tlli1 that flows two currents to form a magnetic field, the plurality of container coils are connected in series, and at least a part of these container coils is provided with at least one of a resistor or an actuator whose value can be changed. A power supply device characterized by connecting them in parallel and connecting them to one power supply (two power supplies). (2) At least a part of the container coil (corresponding to 2 is provided with a correction coil, and a resistor or an accelerator that can change the value of the correction coil section is connected to the container coil 12 and 62). The power supply device according to claim 1, further comprising an additional connection.