摘要:
A solenoid device includes two electromagnetic coils, two stationary cores, two plungers and a yoke that surrounds the two electromagnetic coils. When a first electromagnetic coil is energized, magnetic flux flows through a first magnetic circuit that includes the first stationary core. When the two electromagnetic coils are energized, magnetic flux of the first electromagnetic coil flows through the first magnetic circuit, and magnetic flux of the second electromagnetic coil flows through a second magnetic circuit that includes a second stationary core. When energization of the first electromagnetic coil is stopped while maintaining energization of the second electromagnetic coil, the magnetic flux of the second electromagnetic coil continues to flow through the second magnetic circuit and a third magnetic circuit that includes the two stationary cores. A magnetism limiting portion is disposed in a portion of the second magnetic circuit that does not overlap the third magnetic circuit.
摘要:
A relay system includes a plurality of relays that is provided between a power supply unit supplying electric power and a load acting by receiving the electric power supplied from the power supply unit to switch between conduction and interruption of the electric power supplied from the power supply unit to the load, each of the relays having an exciting coil, a control unit that controls switching between application of current to the exciting coils and interruption of the current, first switches that separately excite the exciting coils, and a second switch that is connected between the exciting coils. The control unit controls turning on and off the first switches and the second switch to switch the exciting coils between parallel connection and series connection.
摘要:
A relay system is provided which is designed to avoid flow of inrush current through a capacitor in a pre-charge mode wherein the capacitor is pre-charged. The relay system includes a pair of power lines, a capacitor, a series-connected assembly, a control circuit, and a relay module. The relay module includes two main switches, a main coil, and a sub-coil. In the pre-charge mode, the control circuit energizes both the main and sub-coils to turn on only one of the main switches. Before entering the pre-charge mode, the control circuit diagnoses the sub-coil. When the sub-coil is determined as being malfunctioning, the control circuit inhibits the pre-charge mode from being entered.
摘要:
A first and a second pair of projecting portions are provided in a cavity portion of a fuse mounting portion made of resin. An upper end surface of each projecting portion is tapered, so as to guide a pair of male terminals of a fuse sub-assembly toward a corresponding female terminals attached to the cavity portion, when the fuse sub-assembly is inserted into the cavity portion. A gap is formed between the fuse sub-assembly and the tapered upper end surfaces in a fuse-mounted condition, in which the fuse sub-assembly is in contact with a stopper portion of the cavity portion, in order to prevent contact failure caused by thermal shock.
摘要:
A base portion has a separation wall, and an air hole is defined in the separation wall. A case portion defines a first space with the separation wall of the base portion. A covering portion defines a second space with the separation wall of the base portion. A waterproof and breathable sheet covers the air hole. A water guiding portion is arranged adjacent to a surface of the sheet not to contact the surface of the sheet. The water guiding portion is located between the covering portion and the sheet.
摘要:
A vehicle approach alert device includes: a first output sound voltage waveform signal generator having a first output sound generator that generates a first signal corresponding to output sound data read out from a memory device, and a first sound volume variable device that controls a voltage level of the first signal; a second output sound voltage waveform signal generator having a second output sound generator that generates a second signal corresponding to the output sound data read out from the memory device, and a second sound volume variable device that controls a voltage level of the second signal; a mixer circuit that mixes the first signal and the second signal; and an amplifier that outputs a vehicle approach alert sound with flowing current, which corresponds to a voltage of a mixed signal, through a sound output body.
摘要:
A transceiver that transmits and receives data used in a communication system, in which the data is encoded by a transmission line code and a signal level of the transmission code changes at a predetermined transition timing in a bit-duration. The transceiver includes: a clock generator that generates an internal clock used for internal circuits; a timing generator that generates, by using the internal clock generated by the clock generator, a timing signal synchronized to a reference clock supplied externally; an encoding circuit that encodes, by using the timing signal generated by the timing generator, a transmission data which is synchronized to the reference clock to be the transmission line code; and a waveform shaping unit that performs a waveform shaping of a waveform at the predetermined transition timing of the transmission data to be based on the reference clock.
摘要:
A solenoid device is provided which is equipped with a first and a second magnetic coil and a first, a second, and a third magnetic circuit, and designed so that when the second magnetic coil is deenergized while the first magnetic coil is kept energized following a dual-energized mode in which the first and second magnetic coils are energized, the magnetic flux Φ flowing through the second magnetic circuit disappears. The magnetic flux Φ of the first magnetic coil, thus, continues to flow though the first and third magnetic circuits, thereby creating a magnetic force to keep a first plunger and a third plunger attracted. This enables the plungers to be attracted independently from each other and results in a decrease in power consumption of the magnetic coils when the plurality of plungers are attracted simultaneously.
摘要:
A contact welding detection system includes a main circuit including a DC power source, a power-supply unit electrically connected to the DC power source, and a main circuit relay electrically connected between the DC power source and the power-supply unit, a measurement unit measuring an electrical characteristic value on a signal wiring between a signal generation unit and the main circuit. The system further includes a welding determination unit configured to determine the presence or absence of contact welding in the relay on the basis of the electrical characteristic value, and a first forced ground-contacting unit electrically connected between the main circuit and a conductive member connected to ground. The first forced ground-contacting unit is electrically connected to the main circuit at a connection point located on an opposite side of the relay to a connection point at which the signal generation unit is electrically connected to the main circuit.