摘要:
A laminated capacitor that can be made small in size, that can prevent flashover, has excellent dielectric strength performance and a large capacitance is disclosed. Each gap between internal electrodes in the same plane is set at 2.7 to 20 times a thickness (element thickness) of a dielectric layer positioned between first and second internal electrode groups which face each other and a distance between an edge of the external terminal and an edge of the floating internal electrode closest to the external terminal among floating internal electrodes of the internal electrode group of the outermost layer is set at 0.4 mm to 1.4 mm.
摘要:
A multilayer capacitor capable of having reducing electrical field intensity at external electrode edges while preventing occurrence of surface dielectric breakdown. This multilayer capacitor has a capacitor main body which includes a capacitance formation section having alternately laminated pluralities of internal electrodes and dielectric layers, and outer dielectric layer sections laminated on the upper and lower surfaces of the capacitance formation section. The capacitor also has external electrodes formed on respective opposite external side surfaces of the capacitor main body and each connected to certain ones of the internal electrodes. The outer layer sections each have respective dielectric breakdown prevention layers therein, each of which exhibits a carefully designed relative dielectric constant .epsilon. which is less than that of the dielectric layers in the capacitance formation section, and not more than 300, and has a thickness d �.mu.m! satisfying the relation: d>(0.2.times..epsilon.)+20.
摘要:
The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg
摘要:
An object is to automatically detect the positions of spike noise, create a distribution diagram, and perform pass/fail decisions. The cross-correlation function of the signal waveform from a magnetic head 1 and a reference waveform simulating spike noise is used in extraction of spike noise. The number of peaks in the cross-correlation function exceeding a threshold value is counted, and quantitative evaluation of spike noise is performed.
摘要:
Provided are a double-layer perpendicular magnetic recording medium having a high medium S/N at an areal recording density of 50 Gbits or more per square inch, and a magnetic storage apparatus having excellent reliability with a low error rate. The perpendicular magnetic recording medium is formed by sequentially laminating a domain control layer, an amorphous soft magnetic underlayer, an intermediate layer, and a perpendicular recording layer on a substrate. The domain control layer is a triple-layer film formed by laminating a first polycrystalline soft magnetic layer, a disordered antiferromagnetic layer, and a second polycrystalline soft magnetic layer from a substrate side.
摘要:
This invention pertains to a rotor core (6) in which a plurality of core sheets (1) are laminated on one another on a rotor shaft (4). A plurality of slits (3, 7) and a plurality of strips (2) are alternately arranged in a radial direction of each of the core sheets (1) so as to convexly confront a center of each of the core sheets (1) such that an outer peripheral rim (10) is formed between an outer peripheral edge of each of the core sheets (1) and each of opposite ends of each of the slits (3, 7). A stress concentration portion (11) which is provided at a portion (10a) of the outer peripheral rim (10) and has a width (L1) larger than that of the remaining portions of the outer peripheral rim (10).
摘要:
A rotor magnet of a three-phase reluctance magnet motor is magnetized by coupling two of the three outer terminals (RS), and feeding a positioning current between the outer terminals RS and a third terminal (T) for positioning the rotor at a magnetizing position with reluctance torque. Then, rotor is kept from moving by holding the shaft of the rotor with the rotor positioned at the magnetized position. Next, the outer terminals RS are separated and magnetizing current is fed between the outer terminals R and S to magnetize the rotor magnet.
摘要:
In a motor having a permanent magnet built in a rotor, a hole for preventing a short-circuit of magnetic flux is disposed so that the hole is adjacent to the outer rim of rotor core, and adjoins to a slit for receiving a permanent magnet as well as the permanent magnet per se. This structure prevents a short-circuit of magnetic flux generated by both ends of the permanent magnet, and the magnetic flux at both ends of the magnet can flow to a stator, thereby contributing to generate torque effectively. As a result, the highly efficient motor with less cogging torque, less vibration and lower noise can be provided.
摘要:
A cooling device according to the present invention, in which a space is formed by means of flat electrodes and side plates disposed on the ends of the flat electrodes, and a flexible film fastened in that space in a shape of the letter S, is fixed to a semiconductor package so that one of the flat electrodes is fitted on the semiconductor package. The respective flat electrodes are alternately powered to move the S shaped section of the flexible film.
摘要:
An automobile wiper device includes a variable-driving unit capable of adjustably changing at least one of the arm pressure and the wiping area of the wiper device.