摘要:
A circuit (20, 50) for voltage stabilization in an onboard power supply (10), particularly for motor vehicles, which is electrically connected between the onboard power supply (10) to be stabilized and a first energy store (E1) is disclosed. The circuit (20, 50) includes a diode element (24) which contains a plurality of semiconductor switches (34) connected in parallel. The circuit (20, 50) also includes a pilot and control circuit (33). The control circuit (33) determines the level of a current flowing through the diode element (24) and controls the semiconductor switches (34) of the diode element (24) on the basis of the determined current level. The circuit (20, 50) includes a second energy store (E2) which is electrically connected to the diode element (24) and to the onboard power supply (10).
摘要:
For controlling a multi-stage load with pulsewidth modulation (PWM), the individual stages have normally separately applied thereto load currents which are clocked in a phase-shifted mode so as to avoid load peaks. An output stage for PWM control of a load stage with a delay circuit which, in addition to the load current modulated by a PWM input signal, supplies a PWM output signal that is delayed by a predetermined fraction of the period duration relative to the PWM input signal. The output stage can especially be realized by integrating the delay circuit together with the actual power semiconductor switch and an associated monitoring and control circuit in a single component. By cascading such output stages, a controller for phase-shifted PWM control of multi-stage loads, which is independent of a precise time base, can be realized in a simple manner.
摘要:
A glow plug comprises a heating rod with an inner heater coil and optionally at least one control coil, the heating rod being insulated from the glow plug body and is provided with a plug-type or screw terminal for the power supply voltage. Furthermore, the terminal (4) has an electronic component (6), preferably a chip, with a terminal (7) connected to the power supply voltage, a terminal (8) connected to the glow tube (1.3) and a terminal (9) connected to the body (3). The electronic component (6) is designed as a control element for switching the functioning of the glow plug between a heating function and a sensing function for measuring the ion flow in the combustion space area in proximity to the heating rod (1).
摘要:
The invention relates to a circuit (20, 50) for voltage stabilization in an onboard power supply (10), particularly for motor vehicles, which is electrically connected between the onboard power supply (10) to be stabilized and a first energy store (E1). The circuit (20, 50) comprises a diode element (24) which contains a plurality of semiconductor switches (34) connected in parallel, a pilot and control circuit (33) which determines the level of a current flowing through the diode element (24) and controls the semiconductor switches (34) of the diode element (24) on the basis of the determined current level, and a second energy store (E2) which is electrically connected to the diode element (24) and to the onboard power supply (10).
摘要:
The present invention relates to a motor vehicle electrical system, comprising a generator, a battery, a high-capacity capacitor and a power distributor for controllably supplying energy to individual load circuits of the motor vehicle. The generator, the battery and the high-capacity capacitor are connected in parallel. The electrical connection line between the battery and the power distributor has a cross-section of less than 10 mm2 if the line is less than 2 m long while having a cross-section of less than 40 mm2 if the line is more than 2 m long.
摘要:
An overheating protection system for a control unit includes an interrupter element, which, in its initial position defined with respect to a circuit board, electrically connects the opposite facing ends of at least one track on the circuit board, and an actuating element which is activated with the overheating of the transistor, and which on actuation against the interrupter element takes effect and releases it at least so far from the tract that the electrical connection is interrupted. A preassembled actuating unit for the interrupter element of the overheating protection is comprises an accommodation housing, in which an actuating element is accommodated and which can be brought into interaction with the interrupter element and which is held releasably by a one-piece latching element formed on the accommodation housing under pretension. An electrical heating device with a control unit protected against overheating is also provided.
摘要:
An apparatus for monitoring tire pressure on automobiles, having an arrangement (1), intended for installation into a wheel, made up of a pressure sensor, a transmitter, and a circuit for operating the pressure sensor and transmitter, and having a battery (2) which supplies the circuit with power via a power supply line (3), the arrangement (1) and the battery (2) being located in a sealed housing (9). Located in the power supply line (3) is an electronic switch (4) which has a control electrode (5) and is nonconductive when the control electrode (5) is connected to ground.
摘要:
A method for operating devices on wheels having pneumatic tires to signal the tire pressure, i.e. the air pressure in the pneumatic tire, in which a pressure sensor measures the tire pressure at regular intervals, and an analysis circuit compares the tire pressure readings with a reference pressure and, in the event of deviations of the tire pressure reading from the reference pressure which exceed a threshold value .DELTA.p, transmits by radio, to an indicating device arranged separately from the wheel, a signal reporting the deviation, such that the device meets its energy needs from an electrical battery. Radio operation is discontinued as long as the pressure measured by the pressure sensor is below a preselected second pressure threshold, in particular a preselected absolute pressure value.
摘要:
Electric low current signals are transmitted through two-wire circuits having coaxial connectors which are closed by windings that are coupled transformer-like to the coaxial connectors. This arrangement allows transmission of control signals for electric power consuming devices within automobile doors, low frequency audio signals, and electrical power to power the electric consumers. All signals are transmitted on a common data cable. Control signals are in binary coded form, modulated onto a carrier signal, as are modulated, low frequency audio signals. The signals are demodulated in a door module and separated according to frequency. The low frequency audio signals are amplified and transmitted to a loudspeaker. The control signals are processed by a microprocessor controller in conjunction with switching units that create corrective actions for the power consuming devices located in the door.
摘要:
The present invention relates to an electric heating apparatus, particularly as an additional heater for an automotive vehicle, and to a control circuit for an electric heating apparatus that permits a substantially independent operation of the additional heater. The heating power control takes place via a temperature sensor integrated into the additional heater and limit values stored in the control circuit before.