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    • 6. 发明专利
    • Vacuum valve
    • JP5342517B2
    • 2013-11-13
    • JP2010159652
    • 2010-07-14
    • 三菱電機株式会社
    • 俊則 木村満 月間淳一 安部基宗 佐藤
    • H01H33/662H01H33/664
    • PROBLEM TO BE SOLVED: To provide a vacuum valve excellent in voltage resistance and short-circuit breaking performance by optimizing the structure of a cover covering an electrode. SOLUTION: A vacuum valve comprises covers 16a and 16b made of a material having high voltage resistance. The cover 16a covers a coil part 11a of a longitudinal magnetic field electrode which generates a longitudinal magnetic field in parallel to an arc generated when a fixed-side contact 6a and a movable-side contact 6b are opened, and a fixed-side electrode bar 5a. The cover 16b covers a coil part 11b and a movable-side electrode bar 5b. The covers 16a and 16b are respectively attached to coil covers 19a and 19b, which cover respective portions extending from the side face to the bottom of the coil parts 11a and 11b, via a predetermined gap from the coil covers 19a and 19b. The covers 16a and 16b respectively include electrode bottom covers 18a and 18b which cover respective bottoms 12a and 12b of the coil parts 11a and 11b. Respective ends on one side of the coil covers 19a and 19b are fixed between the movable-side contact 6b and the coil part 11a and between the fixed-side contact 6a and the coil part 11b. Respective ends on the other side of the coil covers 19a and 19b have an inner diameter larger than an outer diameter of the coil parts 11a and 11b. COPYRIGHT: (C)2012,JPO&INPIT
    • 7. 发明专利
    • Electric motor
    • JP5307849B2
    • 2013-10-02
    • JP2011102745
    • 2011-05-02
    • 三菱電機株式会社
    • 淳一 安部哲 藤村晃裕 大穀
    • H02K1/27
    • PROBLEM TO BE SOLVED: To obtain an efficient electric motor by withstanding high-speed rotation and reducing torque ripples. SOLUTION: The electric motor includes a rotor 2 and a stator 103 provided to cover the rotor. The rotor 2 has a plurality of permanent magnets 6, and a permanent magnet group 9 is constituted by collecting some permanent magnets 6 for every pole. Each permanent magnet 6 is arranged at spaces mutually through a partition 8. The permanent magnet group 9 is formed into the sinusoidal shape as the fundamental wave of a rotating magnetic field as a whole. By this structure, a magnetic flux destination distribution in a gap between the rotor 2 and the stator 103 approaches the sinusoidal distribution, a torque ripple is reduced to improve efficiency, the partition 8 enhances resistance in the diameter direction of the rotor 2, and the rotor 2 can bear centrifugal force by high-speed rotation. COPYRIGHT: (C)2011,JPO&INPIT