Other

Kouichi Takagi

Takeshi Endoh

Kazuhiro Aoki

Satoshi Nakagawa

Keizo Ikeda

Keizou Ikeda

Shuji Mayama

The power supply system includes an alternator that generates electric power according to the number of revolutions of an engine mounted in a vehicle and charges a predetermined battery; an output unit for outputting the electric power from the charged battery to the outside; a power generation control unit that detects the current amount of the electric power transmitted from the battery to the output unit and sets the number of engine revolutions according to the detected current amount; and an engine control unit that controls the number of revolutions of the engine in accordance with the number of engine revolutions set by the power generation control unit.

Power supply system by use of vehicle

A protection circuit has a diode being connected in parallel to an inductive load and having a forward direction set reverse to the conduction direction of a power supply current and a Zener diode being placed between one terminal of the diode and one terminal of the load corresponding to the terminal of the diode and having a forward direction matched with the conduction direction of the power supply current.

Protection circuit

The automobile power source monitor is provided with: a breaker mounted in the feeding path through which the electric power from the battery is fed to the electric devices through the feed sockets A -Am provided in the car; an engine stop detecting circuit to detect the stop of the engine according to the L signal of the regulator IC , and to shut down the breaker through the driving circuit ; an over current detecting circuits C -Cm to detect the over current according to the detecting values of the current detecting circuits B -Bm, and to shut down the breaker ; an idling-up instruction circuit to detect the increase of the feeding current, and to instruct the idling-up; and a low voltage detecting circuit to detect the lowering of the output voltage of the battery and to shut down the breaker

Automobile power source monitor

A power supply monitoring apparatus, for which a plurality of different preset reference current values and corresponding permitted times are provided, includes: a cutoff device; current detection circuits; overcurrent detection circuits; an idle-up command circuit; and a low voltage detection circuit. When an overcurrent detection circuit detects a current value equaling or exceeding at least one of the preset reference current values, and when that condition continues for a time equaling or exceeding a permitted time corresponding to the pertinent reference current value, the circuit transmits a command to the cutoff device to interrupt the current supplied to a power feeding path. Further, when the idle-up command circuit detects an increase in a supplied current, an idle-up command is issued.

Power supply monitoring apparatus for vehicle

When a circuit is activated, bases of transistors Q,and Q,making up a first current mirror circuit,are grounded through switch means,whereby a current is forcibly made to flow into the bases of the transistors Q,and Q,Thus, the circuit operation can be made reliable at the activation time. A part of load current is shunted with good accuracy via a resistor R,having a first resistance value of a predetermined magnification of a resistance value of a shunt resistor Rs, the first current mirror circuit,and a second current mirror circuit,and the output end of the shunted current is grounded via a resistor R,having a second resistance value, so that an output voltage VOUT proportional to a load current IL can be obtained with good accuracy from the resistor R,and the load current IL can be found with good accuracy from the output voltage VOUT.

Growing community of inventors

Nagoya, Japan

Kouichi Takagi