Abstract: A load driving system 1 capable of limiting the generation of an inrush current at the start of driving a load 2. A power source 3 having an output voltage higher than a normal driving voltage of the load is used for driving the load. An FET 4 is connected to the load. A rectangular pulse signal is supplied to the gate of the FET from a pulse generator 5a. The signal causes the FET to switch on and off, supplying the current to the load. When an inrush current flows at the start of driving of the load, an integrator 10 provided to the gate of the FET is operated to mitigate the rising characteristics of the pulse signal. This causes the current flowing through the load 2 to rise in a relaxation curve, thereby enabling the limitation of the inrush current.

Abstract: The safety device for a power circuit includes a first power circuit (2A) including a first load (4) and a first fuse element (5A) for receiving a first voltage power from a power supply (9) to supply the first voltage power to the first load through the first fuse element. The safety device includes a second power circuit (2B) including a second load (3) and a second fuse element (5B) for receiving a second voltage power from a converter (8), which converts the first voltage power into the second voltage power, to supply the second voltage power to the second load (3) through the second fuse element (5B). The device includes a fusion system (20) for fusing the other of the first and second fuse elements when an arbitrary one of the first and second fuse elements fuses.

Abstract: A current detection switch comprising a measured conductor into which a measured current flows, a plurality of magnetoelectric devices placed sandwiching the measured conductor so as to have magneto-sensitive faces on sides to which a magnetic flux generated by the measured current is input, each of the magnetoelectric devices for outputting a magnetoelectric signal when the magnetic flux exceeds a predetermined value, and a computation section for outputting a logical multiplication of the magnetoelectric signals from the plurality of magnetoelectric devices as a detection signal.

Abstract: A load driving apparatus comprises a power supply, a load circuit, a first switch, a limiting resistor, a second switch and a controller. The power supply voltage is applied to the load circuit by the power supply, and the load is driven. The first switch is connected to the load circuit and the power supply in series, and enable or disenable the application of power supply voltage to the load circuit. The limiting resistor is connected to the load circuit in series, dividing the power supply voltage between itself and the load circuit, and thereby limiting the current supplied to the load circuit. The second switch is connected to the limiting resistor in series and to the first switch in parallel, and enable or disenable the application of power supply voltage to the load circuit and the limiting resistor.

Abstract: A load driving apparatus is constituted with a high voltage power source, a low voltage power source, a first switching element, a second switching element, a lamp load, current detecting section, and PWM control section. The first switching element is connected to the high voltage power source which supplies a high voltage and is connected to the lamp load. The second switching element is connected to the low voltage power source which supplies a low voltage and is connected to the lamp load. The current detecting section detects a value of current flowing in the lamp load. The PWM control section is connected the first switching element, the second switching element, and the current detecting section to control a voltage to be supplied to the lamp load. The PWM control section turns the second switching element in ON state at first, and the low voltage is being supplied to the lamp load while the value of the current detected in the current detecting section is more than a predetermined value.

Abstract: A power distributing system is provided with improved efficiency in converting a voltage of a power source and also reduced heat-generation. The power distributing apparatus 1 includes a power source part 4 generating a power source of a high voltage and a plurality of electronic control units 7 to which the power source part 4 supplies the power source of the high voltage through respective power lines 5, 8. The power lines 8 from the power source part 4 are connected with the electronic control units 7 through the intermediary of a plurality of intermediate connectors 9. Each intermediate connector 9 has a built-in converter 13 for converting the high voltage of 42V into an intermediate voltage of 12V. In each electronic control unit 7, a series regulator 14 is arranged to convert the intermediate voltage of 12V into a load voltage of 5V.

Abstract: The electrical connection system includes a power source circuit for outputting a first voltage to operate a first load circuit. The power source circuit includes a conversion circuit for converting the first voltage into a second voltage lower than the first voltage. The system includes a second load circuit operative in response to the second voltage. The system includes a protection circuit for shunting the second load circuit with a threshold voltage between the first voltage and second voltage. The threshold voltage has identical influence on the second load circuit relative to the first voltage.

Abstract: A load driving device of the invention includes an electric charge control unit 3, which charges a low-voltage battery 7 with a direct-current voltage from a DC/DC converter 2 that converts a high voltage from a high-voltage battery 1 into a low voltage. The electric charge control unit 3 includes a switching regulator 11 for performing switching of the direct-current voltage from the DC/DC converter 2 varying an output voltage supplied to the low-voltage battery 7, a series regulator 12 for inputting the direct-current voltage from the DC/DC converter 2 and adjusting power consumption to vary an output voltage supplied to the low-voltage battery 7, and a voltage-current detector 13 for detecting a voltage in accordance with a charge ratio of the low-voltage battery 7.

Abstract: A power distributing apparatus is provided to reduce the number of voltage converters. The power distributing apparatus 1 includes a power source part 4 for supplying a power of 42V, an electrical connection box 7 connected with the part 4 through a power line 5, and a plurality of electronic control units 8a, 8b . . . , 8n. The electrical connection box 7 has a regular-supply converter 9 to convert a high voltage of 42V to an intermediate voltage higher than a load voltage of 5V. The regular-supply converter 9 can exhibit a high conversion efficiency when the apparatus is operated under high load. Each of the electronic control units 8a, 8b . . . , 8n has a series regulator 14 to convert the intermediate voltage to the load voltage. Owing to the supply of voltage higher than the load voltage by the regular-supply converter 9, there is no need to consider inconvenience due to voltage drop between the converter and a remote load.

Abstract: A current sensor including a cabinet 10, a sensor conductor 20 partially accommodated in the cabinet 10 and secured to the cabinet 10 and having opposite ends pulled out from the cabinet 10, and a Hall element 30 accommodated in the cabinet 10 and secured to the cabinet 10, and disposed in the vicinity of the sensor conductor 20. An electric circuit including the current sensor, and a wire conductor 60 used for wiring of the electric circuit and having fitting portions 61 to be fitted to terminals 1 and 2 of the sensor conductor 20 of the current sensor.

Abstract: A current detector includes; a conductor to be measured in which a through hole is formed, the conductor to be measured having a first branch path and a second branch path for dividing a current flowing into two portions; a first magnetic-electric conversion element being arranged in the through hole of the conductor to be measured, the first magnetic-electric conversion element being provided for detecting a disturbance; and a second magnetic-electric conversion element being arranged outside of the first branch path and the second branch path formed in the conductor to be measured.

Abstract: A power source system for a vehicle includes a generator for producing a power. The system includes a first battery for being charged by the generator to supply a power of a first voltage to a first load. The system includes a second battery for supplying a power of a second voltage to a second load. The system includes a converter for receiving a power of the first voltage from the first battery to convert the power of the first voltage into a power of the second voltage to be supplied to the second battery. The system includes a controller for controlling output of the converter, in accordance with one of states of the generator, a charge of the first battery, the first load, a charge of the second battery, and the second load.

Abstract: A vehicular power supply device which includes a generator, a high-voltage battery, a voltage converter, and a plurality of low-voltage batteries. The high-voltage battery is charged with power outputted from the generator and supplies the charged power to a high-voltage load. The voltage converter converts an output voltage of the high-voltage battery into another voltage. The plurality of low-voltage batteries respectively connected to the voltage converter in parallel, are charged with power outputted from the voltage converter and supply the charged power to a low-voltage load.

Abstract: A current detector having a linear conductor 111, 112, a linear to-be measured conductor 10 disposed substantially in parallel to the conductor 111, 112 and through which a to-be measured current flows. A Hall element 20 disposed in the vicinity of the to-be measured conductor 10 such that a magnetic flux generated by the to-be measured current flowing through the to-be measured conductor 10 enter into a magnetic-force sensing face 21 substantially perpendicularly. A substrate 30 for supporting the conductor and the to-be measured conductor 10 such that the magnetic flux generated by a current flowing through the conductor becomes substantially parallel to the magnetic-force sensing face +21 in the magnetic-force sensing face 21 of the Hall element 20.

Abstract: A CPU (31) captures an on control signal for low-voltage loads (26 to 28) in LAN multiplex transmission, controls low-voltage switching devices (36 to 38) to be turned on in order to supply a power to the low-voltage loads (26 to 28), and performs a DC supply from a low-voltage battery (29) to the low-voltage loads (26 to 28). In this case, immediately after the on control signal for the low-voltage loads (26 to 28) is captured, the CPU (31) controls a voltage converter (32) which is not operating, so as to be activated, thereby performing a DC supply to the low-voltage battery (29) and the low-voltage loads (26 to 28).

Abstract: A load driving system 1 capable of limiting the generation of an inrush current at the start of driving a load 2.

Abstract: A system and method for driving a load at a voltage higher than a normal driving voltage, being capable of reducing switching losses and heat generation amount.

Abstract: An electric current sensor for sensing an electric current flowing through a conductor comprises a single hall element having a magnetic-flux sensitive surface, and an angle adjusting mechanism. The angle adjusting mechanism changes an angle between the magnetic-flux sensitive surface and the direction of a magnetic flux induced by the electric current flowing through the conductor. The magneto-electric conversion element outputs an electric signal in response to a magnetic flux density at the magnetic-flux sensitive surface. The electric current sensor detects the electric current flowing through the conductor based on the electric signal output from the magneto-electric conversion element whose magnetic-flux sensitive surface is oriented with respect to the magnetic flux at a selected angle.

Abstract: A circuit breaker is provided with diagnostic function allowing a user to know whether the circuit breaker is operated normally. The circuit breaker includes a breaker unit 10 for breaking a current flowing from a battery VB to a load 17, a switching element 42 for driving the breaker unit 10 in response to a collision signal, a self-diagnostic part 41 for responding diagnostic signals to diagnose the normality of a line from the battery VB to the unit 10 via the switching element 42, a transistor Tr, a light-emitting diode LED and a resistance R. With the structure of the circuit breaker, by supplying the circuit breaker with the diagnostic signals at appropriate intervals, the user can detect whether peripheral circuits of the breaker unit have any trouble in operation.

Abstract: Terminal covers (51, 52) have terminal accommodation spaces, each of which has an opening of a predetermined shape that permits only one of battery terminals (24, 25), which is of predetermined polarity, to be fitted thereto. Each of the battery terminals (24, 25) is formed in such a manner as to have a predetermined shape enabling the battery terminal to be fitted into the corresponding terminal accommodation space.