Yazaki Corporation

Akihiko Torikoshi

Katsuhiko Naoi

Yasuhiro Suzuki

Yuichi Nakazawa

Hiroshi Iizuka

Kazuhiro Kubota

Akira Serizawa

Takitaro Yamaguchi

A method and device for detecting an initial excitation phase of a stepping motor is provided, by which an initial excitation phase of a rotor corresponding to a position of a stopper can be detected with a unit of a stepping angle of a microstep drive which is smaller than that of a full step drive without using elements such as magnetoelectric elements. Upon appropriately changing an excitation phase of a stepping motor, on the basis of a generated pattern of an induced electromotive force in an exciting coil in a non-excitation state upon a full step drive, whether or not a pointer comes in contact with a stopper to stop a reverse rotation of the pointer and rotor is judged so that it is specified on which excitation phase the pointer and rotor are reversed, thereby detecting an initial excitation phase of the rotor corresponding to a position of the stopper.

Method and device for detecting initial excitation phase of stepping motor

A wiper control device in which an abnormal condition of a FET is detected by distinguishing an action of an overheat-cutting protective function normally difficult to be detected with measuring the drain voltage of the FET and by which the control of the pertinent FET is restrained upon the detection of abnormality so as to prevent a short circuit in the wiper control device from occurring. When an FETB (Qb) is set on, whether or not a drain voltage Vd is lower than Vpe ({fraction (l/2)}VG) is judged (step S ), and if lower, it is judged that the drain and ground is short-circuited, that is, an overheat-cutting protective function is acted, and &ldquo;1&rdquo; is added to the number of times of short circuit detection Perror (step S ). It is judged whether or not the added value of the number of times of short circuit detection Perror reaches a reference value (step S ). If the reference value is reached, it is judged that the drain and ground is actually short-circuited, that is, an overheat-cutting protective function is acted, and each action of a FETA (Qa) and FETB (Qb) is halted (step S ).

Wiper controller with fault detector device

A function selecting control system is provided, which modularizes a plurality of wiper control systems, builds them in an integrated circuit, and selects a desired system on the basis of a selection signal of the system from the outside, thereby drive-controlling a wiper motor. The function selecting control system includes: input device for inputting a selection signal which selects a control logic block corresponding to a starting control mode out of the control logic blocks provided for every control mode of the motor; judgment device for reading the input selection signal for a standard number of times and for judging the coincidence among the read selection signals; count device for counting the number of times of the coincidence; settlement device for settling the selection signal when the number of times of the coincidence reaches the predetermined standard number; and system starting device for starting a control logic corresponding to the settled selection signal.

Function selecting control system

An electrode material includes a sulfide compound containing a tetrazole ring as an active substance. The secondary battery using such a material provides an extremely high energy density.

Sulfide-series electrode material and secondary battery with high energy

A lithium sulfur secondary battery is provided with a cathode containing a highly basic polymer compound in a composition or in a form of a film. The lithium sulfur secondary battery gives a longer cyclic life of charging/discharging and high energy density.

Lithium sulfur secondary battery and elecrode material for a non-aqueous

An electrode material includes a sulfide compound containing an oxadiazole ring as an active substance. The secondary battery using such a material provides a large current at room temperature.

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Shizuoka, Japan

Akihiko Torikoshi