A device A for testing the insulating performance of a semiconductor element is configured from: a thermostatic bath 3; a test substrate 10 that is accommodated in the thermostatic bath 3 and has a tested element 1 mounted thereon; a high voltage generation device 60 for applying high voltage to the tested element 1; an opening/closing mechanism 21 for connecting and disconnecting a circuit unit 20; a multi-channel voltage waveform monitor 70 that monitors a current detection resistor 56 connected to the tested element 1 and identifies a tested element 1a in which dielectric breakdown occurs; and a circuit unit breaker mechanism 80 that electrically disconnects the circuit unit 20 by an operation command from the multi-channel voltage waveform monitor 70. The opening/closing mechanism 21 is configured from a fixed-side terminal section 30 and a movement-side terminal section 40 that connects and disconnects the fixed-side terminal section 30 by being brought into contact with and separated therefrom. The circuit unit breaker mechanism 80 moves the movement-side terminal section 40 and breaks (turns off) the fixed-side terminal section 30.
A magnetic stimulator includes a magnetic core, conductors, and a casing. The magnetic core includes a body portion, and leg parts that protrude in the same direction from the body portion. The conductors are wound in a coil manner respectively around the leg parts. The casing is a container for housing the magnetic core and the conductors. The leg parts of the magnetic core are formed such that cross-sectional areas thereof that are parallel to a plane which simultaneously crosses the leg parts gradually decrease from base parts on the body portion side toward tips.
This heat treatment device is formed from: a magnetic core 7 which is disposed so as to penetrate through the inside of one or more wound cores 1, each formed into a closed circuit by winding a metal foil body into a coil shape and by electrically connecting winding ends 3, 4 of the coil together by means of an electrical connection means 5; and a heating coil 8 which is wound on the outer side of the outer periphery of the wound core 1 so as to enclose the wound core 1, and which is configured to induce an induction current 6 in the wound core 1 by applying a fluctuating current and to heat the wound core 1 using the induction current 6. Because of this, long objects and multiple products can be uniformly heated, and rapid heating can be achieved for improved productivity and reduced treatment time.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
H05B 6/10 - Induction heating apparatus, other than furnaces, for specific applications
A magnetic stimulation device includes: a U-shaped magnetic core including a core body and a pair of legs extending in the same direction from the core body; conductors including a conductor having conductive layers that are wound around the leg and stacked in different levels and a conductor having conductive layers that are wound around the leg and stacked in different levels. The conductive layers and are each formed of a wire having a rectangular cross section that is parallel to the longitudinal direction of the legs, and are connected in parallel to the respective legs. Between the legs, the wires of the conductive layers around the leg are respectively connected, at each level, to the wires of the conductive layers around the second leg.
The purpose of the present invention is to implement a magnetic stimulator: that can not only be large but also miniaturized; that has a temperature rise, due to heat generation when energized, that is lower than a safety standard; and that enables multiple continuous magnetic stimulations. A magnetic stimulator A includes a magnetic core 2, conductors 1b, 1c (1b', 1c'), and a casing 4. The magnetic core 2 includes a body portion 2a, and leg parts 2b, 2c that protrude in the same direction from the body portion 2a. The conductors 1b, 1c (1b', 1c') are wound in a coil manner respectively around the leg parts 2b, 2c. The casing 4 is a container for housing the magnetic core 2 and the conductors 1b, 1c. The leg parts 2b, 2c of the magnetic core 2 are formed such that cross-sectional areas Sb, Sc thereof that are parallel to a plane K which simultaneously crosses the leg parts 2b, 2c gradually decrease from base parts 2k, 2l on the body portion 2a side toward tips 2s, 2t.
A61N 2/04 - Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets using variable fields, e.g. low frequency or pulsating fields
[Problem] To provide a magnetic stimulation device with which, by devising the structure of a conductor, heat generation by the conductor can be suppressed, and an increase in the temperature of a skin contact surface of the conductor can be suppressed. [Solution] A magnetic stimulation device A is composed of: a core body 21; a magnetic core 20 that is formed in a U shape by a pair of legs 22, 26 extending in the same direction from the core body 21; and conductors 12, 16 comprising conductor layers 12a-12n, 16a-16n that are respectively wound around the legs 22, 26 and that are stacked in multiple stages. The wire materials used in the conductor layers 12a-12n, 16a-16n are square shaped in the cross-section parallel to the lengthwise direction of the legs 22, 26, and are connected in parallel to the respective legs 22, 26. Between the legs 22, 26, the wire materials constituting the conductive layers 12a-12n of the one leg 22 are respectively connected at each stage to the wire materials constituting the conductor layers 16a-16n of the other leg 26.
A61N 2/02 - Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
A61N 2/04 - Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets using variable fields, e.g. low frequency or pulsating fields
H01F 7/06 - ElectromagnetsActuators including electromagnets
7.
Apparatus and method for non-contact electrical stimulation of cells in liquid culture medium
The present invention provides an apparatus for applying electrical stimulation to cells in a liquid culture medium without using electrodes immersed in the liquid culture medium. This apparatus is an electrical stimulation apparatus A for electrically stimulating cells in a liquid culture medium (2). A liquid culture medium vessel (3) includes: a ring-shaped recess (7) for holding the liquid culture medium (2); and a through hole (6) formed within the ring-shaped recess (7). A magnetic core (1) is made of a magnetic material and disposed such that a portion thereof is inserted through the through hole (6) of the liquid culture medium vessel (3). An excitation coil (5) is wound around the magnetic core (1). A coil power supply (8) supplies a varying current to the excitation coil (5).
The present invention provides an apparatus for applying electrical stimulation to cells in a liquid culture medium without requiring the use of a liquid culture medium dipping electrode. An electrical stimulation apparatus A for applying electrical stimulation to cells in a liquid culture medium 2. A liquid culture medium vessel 3 is provided with: a ring-shaped depressed part 7 in which the liquid culture medium 2 is to be stored; and through-holes 6 formed on the inner surface side of the ring-shaped depressed part 7. A magnetic core 1 is made from a magnetic material, and is arranged so as to penetrate through the thorough-holes 6 in the liquid culture medium vessel 3. An exciting coil 5 is wound around the magnetic core 1. A power supply 8 for coils can supply a fluctuating current to the exciting coil 5.
The objective of the present invention is the practical use of a continuous magnetic pulse generator in which the rise in temperature due to heat is small and which enables multiple continuous magnetic stimuli. The continuous magnetic pulse generator (A) includes: a magnetic core (2); a coil conductor (1) which is wound around the magnetic core (2) multiple times with a coil-cooling gap (3) provided between the winds of the coil conductor (1); a casing (4) having a coil-cooling vent hole (5) and containing the magnetic core (2) and coil conductor (1); and a cooling mechanism (7) which supplies a cooling gas (6) which flows through the coil-cooling gap (3) to the casing (4) or discharges the cooling gas (6) from the casing (4).
Provided is a smaller, lighter and more power-saving successive magnetic pulse generation device. A discharge circuit (K) comprises, in an annular series connection, a pulse coil (6) for magnetic therapy which generates an eddy current in a subject site (3), a charge/discharge capacitor (4), and a switching semiconductor element (7) which supplies a discharge current from the charge/discharge capacitor (4) to the pulse coil (6). In a step-up transformer (1), a primary coil (1a) is connected to an AC power source (2) and a secondary coil (1b) is connected to an input terminal (5a) of a full-wave rectifier circuit (5). A control unit (8) is connected to the switching semiconductor element (7) and controls the conduction timing of the switching semiconductor element (7). Each output terminal (5b, 5b) of the full-wave rectifier circuit (5) is connected to each terminal (P1, P2) of the charge/discharge capacitor (4). An inductor (9) is connected between the output terminal (5b) of the full-wave rectifier circuit (5) and the terminal (P1) of the charge/discharge capacitor (4).
