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    • 1. 发明专利
    • SUPERCONDUCTING DIRECT CURRENT GENERATOR
    • JPH11113241A
    • 1999-04-23
    • JP28450097
    • 1997-10-01
    • YYL KK
    • YAMAGUCHI SAKUTARO
    • H02K55/00
    • PROBLEM TO BE SOLVED: To enable stable long-time power generation, by inducing electric fields in a conductor placed close to a rotor containing a superconductor of the second kind without contact, and taking out its output. SOLUTION: A generator is provided with superconducting magnets 101, a rotor 103 containing superconductor of the second kind which is rotated on a rotary shaft 104, and a stationary conductive member 102 placed nearby opposite to the face of the rotor. The rotor 103 is rotated on the rotary shaft 104 in magnetic fields produced by the superconducting magnets 101, thereby inducing electric fields in the conductive member 102. Then power is taken out of output terminals 105 connected with the ends of the conductive member 102. Since the superconductor with magnetic flux pinned is rotated, the magnetic flux is moved in the stationary conductive member 102 according to the rotational speed of the rotor 103, and electromagnetic force is exerted on charge carriers in the radial direction due to Lorentz force. As a result, electric fields are produced, and direct-current power generation can be performed. Thus the enhancement of the reliability and stability of power generating operation and lengthening of life can be achieved without use of any brush.
    • 5. 发明专利
    • THERMOELECTRIC COOLED POWER LEAD
    • JP2004006859A
    • 2004-01-08
    • JP2003127725
    • 2003-05-06
    • YYL KK
    • YAMAGUCHI SAKUTARO
    • H01L39/04H01F6/00H01F6/06H01L35/16H01L35/28H01L35/32
    • PROBLEM TO BE SOLVED: To provide a thermoelectric cooled power lead which dispenses with a particular cooling means to effectively performs heat dissipation and cooling by itself in the power lead for connecting electrically a super-conductive coil and an electrical source (a first electrical source) for energizing the super-conductive coil. SOLUTION: The power lead includes a thermo-electric cooling element comprising an n-type thermoelectric material connected with a positive electrode of the electrical source and a p-type thermo-electric material connected with a negative electrode thereof. A high-temperature superconductor may be provided between the thermo-electric cooling element and the superconductive coil. Pairs of the n-type thermoelectric material and the p-type thermo-electric material in a plurality of the thermoelectric cooling elements are connected together at the side of the super-conductive coil to be thereby connected with the superconductive coil and the first electrical source 1 and/or a second electrical source 2 are/is connected with the opposite sides via a group of switches, respectively. When the superconductive coil is excited, p-type and n-type thermoelectric materials are connected in parallel with each other and current is fed to the superconductive coil from at least the first electrical source. Otherwise, connections of the group of the switches are changed to connect the plurality of the thermo-electric cooling elements in series and then electric current value of the second electrical source is reduced. COPYRIGHT: (C)2004,JPO