Mitsubishi Electric Corporation

Naoki Itoi

Nobuhiro Kihara

Hiroshi Okuda

Fumito Uemura

Masayoshi Maeda

Kimihiko Tanaya

Toru Daigo

Mitsuo Sone

Kenji Ishi

Masaya Inoue

Takahiro Urakabe

Yuta Atobe

Shinji Kawaguchi

Akihiro Sawada

Yuya Takatsuka

Takayuki Ubukata

A waveform analysis unit () analyzes a waveform obtained by measuring one of a voltage value and an impedance value of a bus line (). A device authentication unit () determines whether a new device is connected to the bus line, the new device being a device not included in configuration information () which includes one or more devices known to be connected to the bus line, performs authentication for each of the devices connected to the bus line, and when the new device is connected to the bus line, acquires authentication information used for the authentication for the new device, and performs the authentication for the new device. An illegitimate operation determination unit () determines whether or not illegitimate operation is performed on the bus line, by using the configuration information, an analysis result from the waveform analysis unit, and an authentication result from the device authentication unit.

Information processing apparatus, information processing method and computer readable medium

A high-frequency discharge ignition device includes a current supply device which supplies an AC current to a spark discharge path formed in a gap of an ignition plug, a control device which controls the operation of the current supply device, and a voltage detection device which outputs a signal of a section where a magnetic induction voltage of a primary coil generated after a switch element of an ignition coil device is placed in a shutoff state exceeds a predetermined voltage, and the control device determines the timing when the spark discharge path has been formed in the gap of the ignition plug according to an output signal of the voltage detection device and operates the current supply device based on the timing when the spark discharge path has been formed in the gap of the ignition plug to supply the AC current to the spark discharge path.

High-frequency discharge ignition device

A voltage control unit is configured to: control, in accordance with an output voltage signal and an output current signal, output power of a rectifying unit to a voltage lower than a voltage by which an amount of generated power of a magneto AC generator becomes maximum; control a transformation ratio in accordance with the output voltage signal and the output current signal so as to improve power generation efficiency of the magneto AC generator one of when an rpm variation signal indicates an decelerating state and when the rpm variation signal indicates that a variation in rpm indicates a value smaller than a predetermined constant; and control the transformation ratio so as to decrease the output power of the rectifying unit when the rpm variation signal indicates an accelerating state.

Power supply device and method of controlling the power supply device

A high-frequency discharge ignition apparatus includes: a spark discharge path generation apparatusfor generating predetermined high voltage and supplying the generated predetermined high voltage to an ignition plug, thereby forming a path for spark discharge in a gap; a resonance apparatuscomposed of an inductorand a capacitor; a current supply apparatusfor supplying AC current to the path for spark discharge formed in the gap, via the resonance apparatus; a current level detection apparatusfor detecting the level of the AC current supplied from the current supply apparatus or a level corresponding to the level of the AC current, and outputting a value corresponding to the detected level; and a control apparatusfor controlling output of the AC current supplied from the current supply apparatus, in accordance with the output of the current level detection apparatus.

High-frequency discharge ignition apparatus

Provided is a compact ignition coil apparatus that can realize reliable insulation breakdown and spark discharge with high discharge current. A high-frequency discharge ignition coil apparatus includes: a capacitorconnected to a high-voltage terminal, for preventing passage of high voltage; and an inductorconnected to the capacitorand forming, together with the capacitor, a band pass filter that allows only a predetermined frequency component to pass. High-frequency current is supplied from outside to the inductor. The high-frequency discharge ignition coil apparatus further includes a current level detection devicefor detecting the level of current flowing in the inductor. The current level detection deviceis placed in one package, together with a primary coil, a secondary coil, a capacitor, and an inductor

High-frequency discharge ignition coil apparatus and high-frequency discharge ignition apparatus

A vehicular power supply device mounted on a vehicle equipped with an idle stop function is provided that enhances engine startability and suppresses a voltage drop at a battery driving the starter, so as to reduce energy consumption by the engine or other drive sources. The device includes a voltage converter for converting a DC voltage Voutput from a generator into a DC voltage control value Vand for outputting the value, and when the idle-stop determination unit determines that the engine is in the idle stop state, the voltage converter outputs, depending on a current and voltage supplied to an electrical load including a starter, a second DC voltage control value Vhigher than a first DC voltage control value Vthat is a target output voltage for the battery.

Vehicular power supply device

A power supply apparatus capable of setting a ripple current to be not more than an acceptable value regardless of an input voltage is obtained. The apparatus calculates switching frequency by a current detected by a current detector so that the switching frequency is set to be low if the current is large and the switching frequency is set to be high if the current is small. The switching frequency is set to be high if the input voltage is high and switching frequency is set to be low if the input voltage is low depending on a voltage inputted to an input terminal; and a switching element is controlled by restricting the switching frequency so that the switching frequency to be set by the current detected by the current detector is not lower than the switching frequency to be set by the input voltage.

Power supply apparatus

An electrical equipment casing includes a circuit board on which many electrical parts are mounted and a heat sink to which the circuit board is fixed. The heat sink is provided with a reactor housing dent that opens in a surface on which the circuit board is placed and radiator fins that reach a bottom portion of the reactor housing dent on a surface opposite to the surface on which the circuit board is placed at a position surrounding an outer circumference of the reactor housing dent. The reactor is housed in the reactor housing dent and a terminal thereof is electrically connected to the circuit board. This structure of the electrical equipment casing can contribute to an achievement of both of a size reduction of the overall casing and enhanced heat dissipation of the reactor.

Electrical equipment casing

A power supply device includes a failure determination means that detects, based on a current detected by a current detector, a failure of the switching elements of each of the chopper sections, and the failure determination means obtains values of the current detected by the current detector at the timing of falling edges of control signals to the switching elements of each of the chopper sections, determines the failure when the obtained current values differ from each other, and transmits a failure signal to a generation control means. When receiving the failure signal, the generation control means limits an output current from a generator in a way such that the withstanding current of a non-failed chopper section out of the chopper sections of the phases is not exceeded.

Power supply device

A power supply device includes: a magneto generator with a rotor having a magnet; a torque supplying device supplying torque to the rotor; a rectifier circuit supplying electric power to a electrical load device by rectifying an output of the magneto generator; a short circuit electrically shorting an output end of the magneto generator; a voltage detection circuit detecting a terminal voltage of the electrical load device; and a control circuit controlling a voltage of the electrical load device to be a first set value by controlling the short circuit to switch ON (short operating mode) and OFF (rectification operating mode) according to the voltage detected by the voltage detection circuit and allowing the short circuit to operate while making a switching between the two operating modes according to a operating state relating to a rotation of the rotor of the magneto generator.

A power supply device comprising: a magneto generator including a rotor including a magnet forming a magnetic field; a rectifying unit rectifying an alternating current of the generator to a direct current and supplying to an electrical load; a voltage detection unit detecting a voltage of the electrical load; an opening unit interrupting electrical conduction of an output of the generator; short-circuiting units electrically short-circuiting the output; a torque supplying device supplying torque to the rotor; a voltage control unit selectively performing one of opening-control of controlling on/off switching of the opening unit and short-circuit-control of controlling on/off switching of the short-circuiting units to control the voltage of the electrical load to a predetermined value in accordance with the voltage detected by the voltage detection unit; a switching control unit switching and controlling between the above two controls in accordance with an operating state regarding rotation of the rotor.

Provided is a power supply device including: a magneto generator (), which includes: a rotor including a magnet forming a magnetic field; and a stator which generates an alternating current in stator windings by rotation of the rotor; a rectifying unit () which rectifies the alternating current generated by the magneto generator to a direct current; a variable transformation-ratio direct current voltage transformer () which transforms an output voltage of the direct current of the rectifying unit to a voltage between input terminals of an electrical load () to which electric power is supplied; and a voltage control unit () which controls a transformation ratio of the variable transformation-ratio direct current voltage transformer in accordance with at least one of an operating state signal regarding the rotation of the rotor of the magneto generator and an electrical load state signal of the electrical load.

A power supply device includes: a rectifier having a full-wave rectification circuit whose low side elements are made of MOSFETs; an electrical load supplied with DC power from the rectifier; and a control circuit having a load voltage detector and an AC voltage detector for detecting an input terminal voltage from a permanent-magnet generator; wherein when a terminal voltage across the electrical load is lower than a predetermined value, the control circuit operates the rectifier in full-wave rectification mode, whereas when the terminal voltage across the electrical load is higher than the predetermined value, the control circuit short-circuits input terminals of the permanent-magnet generator with each other, and when power for driving the control circuit is not secured, the control circuit retains the full-wave rectification mode even if the terminal voltage across the electrical load is higher than the predetermined value.

Growing community of inventors

Chiyoda-ku, Japan

Naoki Itoi