4 results about "Magnetic switch" patented technology

A driving apparatus for a plasma display panel with a pulse generator to supply an alternating pulse to an electrode, and an energy recovering unit to store charges from a discharge cell when the pulse voltage decreases or to output the stored charges to the discharge cell when the pulse voltage increases. The energy recovering unit has a magnetic switch, coupled with the discharge cell and an energy storage capacitor, with variable inductance to control transient time when the pulse transitions from a first voltage to a second voltage. The transient time is based on LC resonance of the magnetic switch inductance and panel capacitance, and can be reduced to improve resolution of the panel. Insulated gate bipolar transistors can be used with the magnetic switches to reduce power loss during switching and in the on-state, and can sustain high voltages necessary for high concentration Xe discharge gas.

An improved roadside barrier marker structure, mainly comprises two triangular marker bodies, and a semicircular groove being disposed on one of the marker bodies with its bottom connected to a base, and a cylindrical cylinder disposed at the center of the base; a cylindrical cylinder disposed on the upper section of another marker body, and a plurality of light emitting diodes (L.E.D.) arranged in partitions, and a base being connected to its bottom having a battery base and a control circuit; an L.E.D. control circuit for coupling to the surface of marker body further comprising a magnetic spring switch; a rectangular magnet, embedded into the cylindrical cylinder at the base of the marker body; with both marker bodies passing through the groove, the cylinder being fixed to the bolt cylinder, such that the bases of the marker bodies being coupled in a cross overlapping. When the present invention is used during car trouble, the system will automatically light up the blinking L.E.D. with the sensing of magnetic switch by the magnet in order to improve the warning effect of the roadside barrier marker.

The invention discloses a high-temperature superconducting linear synchronous motor. The motor comprises a stator part and a rotor part, and further comprises an excitation switch, the rotor part comprises a plurality of multi-turn high-temperature superconducting coils, the adjacent high-temperature superconducting coils are connected in series reversely, the two ends of each superconducting coilare used for being connected with an external excitation power supply, and the excitation switch is connected to the two ends of each superconducting coil in parallel; by utilizing the zero-resistance characteristic of the high-temperature superconductor, the high-temperature superconducting coils are pre-excited by the excitation switch to be electrified, and the currents of the high-temperaturesuperconducting coils are not attenuated in the working process, so that the loss of the conductor coil is reduced, the reactive power of the motor is reduced, and the synchronous operation of the rotor coil without an external excitation power supply is realized; when the high-temperature superconducting coils are reversely connected in series, the directions of thrust generated by the adjacenthigh-temperature superconducting coils under the combined action of the traveling wave magnetic field and the mover current are consistent, the total thrust on the mover can be increased, and the rapid acceleration performance of the pulse power type linear motor is achieved.