Kokusan Denki Co., Ltd.

Shuichi Muramatsu

Hideaki Suzuki

Masanori Nakagawa

Masaki Asari

Hidetoshi Suzuki

Hirofumi Yamaguchi

Yutaka Inaba

Masakatsu Takahashi

Tomoyuki Sato

Nozomu Katsumata

Kazuo Hara

Mitsuyoshi Shimazaki

Shinji Komatsu

Tomohiro Nakagawa

Akinari Ueki

Motoki Yamazaki

Tomoya Tamakawa

Ryosuke Tonooka

A battery charging device provided with: a bridge-type controlled rectifier circuit having three-phase thyristors for rectifying the output of a three-phase AC generator and supplying a charging current to a battery; and a controller for controlling the supplying of a trigger signal to the thyristors in accordance with the terminal voltage of the battery; the controller being configured so that the trigger signal is supplied to the thyristors simultaneously when it is detected that the terminal voltage of the battery is equal to or lower than a set voltage, and supplying of the trigger signal is stopped when a certain period has elapsed after the terminal voltage exceeds the set voltage, in order to prevent commutation failure of the thyristors when charging of the battery is stopped, and prevent overcharging of the battery.

Battery charging device

A power source device for rectifying the output of an AC generator in which magneto coils are in a star-shaped connection in three phases. The device includes a control rectifier circuit configured from a first control rectifier circuit for performing full-wave rectification on three-phase AC voltages, and a second control rectifier circuit for performing full-wave rectification on AC voltages obtained between neutral and each of two-phase AC output terminals selected from the three-phase AC output terminals of the generator, as well as on AC voltage obtained between the selected two-phase AC output terminals; and a controller controlling the first and second circuits so that the output of the first circuit is supplied to the load when the rotational speed of the generator is equal/less than a set speed, and the output of the second circuit is supplied to the load when the rotational speed exceeds the set speed.

Power source device

A resin sealing semiconductor device () having a structure in which a portion to be sealed of components including a plurality of chip mounting board, a semiconductor chip mounted to a front surface of each chip mounting board, and a plurality of leads provided correspondingly to each chip mounting board is embedded in resin molded portions (and) molded into a generally plate shape, and outer lead portions of the plurality of leads (and) are led out in line from a side surface at one end in a width direction of the resin molded portions, and back surfaces as exposed surfaces (toandto) of each chip mounting board are placed on one surfaces of the resin molded portions (and), wherein a plurality of positioning protrusions () are provided on one surfaces of the resin molded portions (and), and a protrusion height of the positioning protrusions is set so that a gap to be filled with insulating resin is formed between each part of the exposed surface of each chip mounting board and a radiator plate when the positioning protrusions () are abutted against the radiator plate.

Resin sealing semiconductor device and electronic device using resin sealing semiconductor device

A semiconductor device having a plurality of semiconductor chips mounted on a lead frame () and required portions covered with seal portions in which: the plurality of semiconductor chips are divided into a first group of semiconductor chips (Dx to Dz) and a second group of semiconductor chips (Du to Dw and Thx to Thz); both groups of semiconductor chips are mounted on the lead frame () at a distance from each other; the seal portions are comprised of first and second resin-seal portions (and) which cover the first and second groups of semiconductor chips, respectively, along with required portions of the lead frame; both resin-seal portions are mechanically coupled with each other by coupling portions; and a group of read terminals respectively connected to circuits within the first resin-seal portion and circuits within the second resin-seal portion are led out through a gap between the first resin-seal portion () and the second resin-seal portion ().

Semiconductor device

A battery charging control device comprising a control circuit that performs control to keep a voltage across a battery charged by an output of an AC generator around a target value, comprising: a load driving switch inserted between the battery and a load; and a load driving switch control circuit that performs control to turn on the load driving switch when the AC generator generates the output and a voltage across the load is equal to or lower than a set value, and turn off the load driving switch when the voltage across the load exceeds the set value lower than the target value of the voltage across the battery.

Battery charging control device

An output control device of a generation device including: a rectifier circuit that rectifies an output of an AC generator and applies the output across a battery; an inverter circuit provided between the battery and the generator; inverter control means for controlling the inverter circuit to convert a voltage across the battery into an AC control voltage and apply the voltage to an armature winding of the generator; and phase detection means for detecting a phase of a phase current flowing through the armature winding of the generator as a maximum output current phase, wherein the inverter control means is comprised to control a phase of the AC control voltage so as not to be delayed with respect to the maximum output current phase, and thus prevent a reduction in the output of the generator caused by an excessive delay of the phase of the AC control voltage.

Output control device of generation device

A generating device that includes an AC/DC conversion unit having a rectifier circuit that rectifies an output of a magneto rotor and applies the output to a battery, and an inverter circuit that converts a voltage of the battery into an AC control voltage and applies the AC control voltage to an armature coil of the magneto generator, performs chopper control that controls switch elements of the inverter circuit so as to interrupt an output current of the magneto generator to control the output of the magneto generator when a rotational speed of the magneto generator is lower than a set speed, and performs drive control that applies the AC control voltage from the battery through the inverter circuit to the armature coil when the rotational speed becomes higher than the set speed, and changes a phase angle of the AC control voltage to control the output of the magneto generator.

Generating device having magneto generator

A generating device including a magneto generator, wherein: an AC control voltage is applied to an armature coil of the magneto generator from a battery via an inverter to change a phase angle of the AC control voltage, thus increase/reduce an output of the magneto generator and match the output of the generator with a target value; it is determined that a characteristic, in which the output of the magneto generator increases when the phase angle of the AC control voltage is delayed, is a normal control characteristic, and a characteristic, in which the output of the magneto generator decreases when the phase angle of the AC control voltage is delayed, is a reciprocal control characteristic; and it is determined whether a present control characteristic of the output of the generator relative to the phase angle of the AC control voltage is the normal control characteristic or the reciprocal control characteristic to decide, based on a determination result, a changing direction of the phase angle of the AC control voltage when the output of the generator is controlled and brought close to the target value.

Generating device including magneto generator

A starter generator for an internal combustion engine including: a rotating electric machine having a magnet rotor mounted to a crankshaft of the internal combustion engine, and a stator with a three-phase first armature coil and a three-phase second armature coil; a first battery and a second battery connected in series or in parallel; a first driver circuit provided between the first armature coil and the first battery, and a second driver circuit provided between the second armature coil and the second battery; and an inverter that converts voltages of the first battery and the second battery into an AC voltage, wherein drive currents are supplied to the first armature coil and the second armature coil from the first battery and the second battery through switch circuits in the first driver and the second driver, when the engine is started, and induced voltages of the first armature coil and the second armature coil are supplied to the batteries through rectifier circuits in the first driver and the second driver to charge the batteries, after the engine is started.

Starter generator for internal combustion engine

A starter generator for an internal combustion engine serving as a starter motor when the internal combustion engine should start and as a generator after the internal combustion engine starts and comprising a magnet rotor and a stator having a plural of coils, a plural of switch circuits to switch a current flowing through the coils and a switch controller to control switch elements of the switch circuits whereby the current flows through all the coils by controlling the switch circuits in accordance with a position of the rotor when the engine should start to thereby produce a large torque and the current flows through one or some of the coils via a rectifying circuit of rectifying diodes provided in some switch circuits after the engine starts to thereby charge the battery.

Growing community of inventors

Numazu, Japan

Shuichi Muramatsu