摘要:
An electromechanical power converter that has a rotor assembly with a conductive shell, a first conductor made from superconducting material that is in series electrical contact with the conductive shell and a second conductor made from superconducting material and in series electrical contact with said conductive shell, thus providing an internal impedance converting electromechanical power converter.
摘要:
A magnetizing device for superconductor and a superconducting synchronous machine are provided capable of constituting more compact and simple equipment that uses a superconductor as a magnet. The magnetizing device for superconductor includes a superconductor (131); a coolant chamber (142) for cooling the superconductor (131) down to or below a critical temperature at which the transition to a superconducting state occurs; coils (111, 111′) for generating a magnetic field equal to or higher than a critical magnetic field in which the intrusion of a magnetic flux into the superconductor (131) starts, around the superconductor (131) cooled down to or below the critical temperature at which the transition to the superconducting state occurs; and position modification means capable of arranging the superconductor (131) on a disk (120) and modifying the relative positional relationship with the coils (111, 111′).
摘要:
An electrically powered launcher is disclosed that can accelerate small payloads to orbital velocities. The invention uses a novel geometry to overcome limitations of other design, and allows full exploitation of existing superconducting materials.
摘要:
A superconducting bearing having at least one permanent magnet magnetized with a vertical polarization. The lower or stator portion of the bearing includes an array of high-temperature superconducting elements which are comprised of a plurality of annular rings. An annular ring is located below each permanent magnet and an annular ring is offset horizontally from at least one of the permanent magnets. The rings are composed of individual high-temperature superconducting elements located circumferentially along the ring. By constructing the horizontally-offset high-temperature superconducting ring so that the c-axis is oriented in a radial direction, a higher levitation force can be achieved. Such an orientation will also provide substantially lower rotational drag losses in the bearing.
摘要:
A ferromagnetic member (21) of a movable part (2) is disposed on a side of a stationary part (1) such that the ferromagnetic member (21) faces a high temperature superconductor (11) of the stationary part (1). The high temperature superconductor (11) is brought into a superconductive state by cooling it to a temperature below a critical temperature in a magnetic field. The magnetic flux pinned to the high temperature superconductor (11) is caused to pass through the ferromagnetic member (21) so that an attractive force is generated between the high temperature superconductor (11) and the ferromagnetic member (21) to hold the movable part (2). When the ferromagnetic member (21) has a shape such that when the gap becomes lower than a predetermined value, the attractive force decreases, the movable part (2) can be stably suspended in a non-contacting manner, without the necessity of control, by the combination of the high temperature superconductor (11) and the ferromagnetic member (21).
摘要:
A method of designing a superconductivity employing apparatus includes the steps of causing a magnetism generating disk-shaped floatable portion (4) to face a disk-shaped fixed portion (2) capable of exhibiting superconductivity with a gap (G) therebetween; initializing the fixed portion (2) to reach a superconducting state at a position where the floatable portion (4) is spaced away from the fixed portion (2) to such an extent that its magnetic field does not influence the fixed portion (2); and using properly first, second, and n-th approach characteristics (S1, S2, Sn) when a difference between an n-th approach characteristic (Sn) and the second characteristic (S2) is smaller than a difference between the first and second characteristics (S1, S2), where the first approach characteristic (S1) is a characteristic of a magnetic floating force obtained by allowing the floatable portion (4) to approach the fixed portion (2), the second approach characteristic (S2) is a characteristic of a magnetic floating force obtained by allowing the floatable portion (4) to approach the fixed portion (2) after the floatable portion (4) is allowed to recede from the fixed portion (2) to such an extent that its magnetic field does not influence the fixed portion (2), and the n-th approach characteristic is a characteristic of a magnetic floating force obtained by repeatedly carrying out the operations subsequent to the operation of the second approach characteristic (S2).
摘要:
An AC electrical machine which includes a superconducting, diamagentic flux shield cylinder enclosing the stator windings such that the magnetic flux produced by the machine's rotor is bottled within the flux shield.
摘要:
A detection device for detecting transitions to the normal state in a superconducting winding, in particular in an electricity generator, and a protection device for protecting such a winding.A detection device for detecting transitions in conductors from the superconducting state to the superconducting state in a superconducting winding at industrial frequency, in particular for the stator of an electricity generator (1). The device comprises an auxiliary generator (4) for generating a low current at a frequency which is considerably higher than industrial frequency, said current being single-phase or multi-phase depending on whether the main current through the winding is single-phase or multi-phase, said auxiliary generator being connected in parallel with the superconductor winding, the device further including means (5, 6) for detecting the change in phase difference between the auxiliary current and the auxiliary voltage which occurs when the conductors of said winding switch to the normal state.
摘要:
A superconducting coil apparatus and a superconducting apparatus including the superconducting coil apparatus are provided. The superconducting coil apparatus includes a superconducting coil 10, an inner container 50 that holds the superconducting coil 10 therein, and an outer container 60. The inner container 50 and the outer container 60 are made of FRP. At a corner portion 71 of the inner container 50 and the outer container 60, a sealing reinforcement portion 2 made of a resin is formed so as to extend along the corner portion 71. Opening portions 53 and 63 are formed in side surfaces of the inner container 50 and the outer container 60. The sealing reinforcement portion 2 is disposed at the corner portion 71 of the opening portions 53 and 63, whereby the sealing performance of the container can be improved.
摘要:
A high temperature superconductor (HTS) synchronous motor or generator includes permanent magnets disposed in the rotor. The permanent magnets can be magnetized after the rotor assembly is manufactured. The permanent magnets reduce flux density perpendicular to the superconducting coil. The magnets can be disposed in the d-axis of the motor. The motor is particularly useful in propulsion applications.