摘要:
To permit elimination of separate exciter diodes of a vehicular three-phase alternator, and yet reliably ensure protection of the vehicular battery and provide an indication of discharge of the battery and hence possible failure of any excitation for the alternator, while additionally providing an indication of possible damage to the battery due to overvoltage conditions, the field of the alternator is separately excited from the battery through a voltage regulator connected to the main switch, and a low-voltage and high-voltage indicator is connected in parallel to the battery, preferably an LED triggered to illumination upon response of one of two threshold sensing circuits which sense undervoltage and overvoltage conditions of the battery beyond a predetermined voltage range.
摘要:
The method of transmitting data as a sequence of high bits and low bits over a transmission line from a transmitting device to a receiving device includes transmitting synchronization signals over the transmission line and transmitting one and only one high bit or one and only one low bit over the transmission line at an end of each synchronization signal. When the predetermined voltage levels for the high bit, low bit and synchronization signals are different from each other, the method is implemented in an especially simple manner. The interfaces for the receiving and transmitting devices for performing the method are also described.
摘要:
The battery charging apparatus includes a generator, main voltage regulator, an auxiliary voltage regulator, at least one consuming device and a protective circuit having circuit portions for recognizing and signalling faults via a charge control lamp. The generator output voltage is rectified with rectifier bridges containing Zener diodes. Voltage comparison to threshold values and logic circuitry for processing the comparison results are used to determine the presence of faults in the operation of the battery charging apparatus. The fault detection device detects conduction defects in the main voltage regulator and/or interruption in the generator excitation circuit. The logic circuitry determines whether simultaneously both a supplied voltage exceeds a threshold value and the main voltage regulator is turned on longer than a predetermined time interval to indicate its continuous operation. After a fault is detected voltage regulation is performed by the auxiliary voltage regulator until the fault is eliminated so that the rectifier bridges are not destroyed. The battery charging apparatus described is particularly suitable for use in motor vehicles.
摘要:
The apparatus for controlling an output voltage of a generator of an internal combustion engine having a starter device, includes a charge control signaling device, an excitation coil for the generator and a voltage regulator controlling an excitation current in the excitation coil and an excitation current limiting device for limiting the excitation current during a predetermined starting phase (.DELTA.t1 ) connected to the voltage regulator. The excitation current limiting device detects whether the engine is in a starting phase. If the engine is in a starting phase, the excitation current limiting device reduces the excitation current so that a voltage is produce at generator terminal D+ which permits no load current and simultaneously guarantees that the charge control signalling device is shut off. After ending of the starting phase the excitation current limiting device is shut off and the excitation current is increased to its standard value, which results in a generator output voltage which is above the power supply voltage that charges the battery.
摘要:
The method of regulating a voltage produced by a generator with a voltage regulator according to a battery charge state includes providing a controller containing a clock and a memory able to store battery and power supply reference data, battery voltage and generator rotation speed; maintaining a regulated voltage produced by the generator at a normal value (U.sub.R) during a first time interval (t1); measuring a battery voltage (U.sub.B) and decreasing the regulated voltage (U.sub.R) during a second time interval (t2); determining the battery charge state from the measured battery voltage (U.sub.B) according to the stored battery- and power supply-reference data; and, when the battery charge state is determined to be unsatisfactory, determining an additional time interval (t4) with the controller and an amount of increase of the regulated voltage (U.sub.R) sufficient to obtain a satisfactory battery charge state during the additional time interval (t4) without damaging the voltage sensitive components of the voltage regulator; and increasing the regulated voltage above the normal value (U.sub.R) by the thus determined amount and turning on no voltage-critical consuming device during the additional time interval (t4). A voltage regulator including the controller is also described.
摘要:
According to the invention, an apparatus for automatically detecting a motor vehicle's generator type is proposed, in which the characteristic voltage course is measured at a terminal (DF) of the generator (1) and compared with values stored in memory. Via an interface (3), a control unit (5) is connected to the controller (2) or generator (1) and evaluates the voltage change (&dgr;DF) upon a load change. To that end, the voltage at the terminal (DF) is measured and evaluated before the electrical load (8) is turned on, after it is turned, and after it is turned off. By means of this apparatus, advantageously not only the generator type (A, B) but also incorrect installations can be ascertained.
摘要:
The electrical machine, in particular a three-phase generator, has a stator (21) secured in a housing (10) and a claw pole rotor (23) which is secured on a shaft (13) and has an exciter winding (28). Between the claw pole rotor and a bearing plate (17) that closes off the housing, there is an electrical repeater (29) for exciting the exciter winding (28). The primary winding (30) is disposed along with the core (36, 41, 47) on the bearing plate (17). The primary and secondary windings (30, 31) of the repeater (29) are disposed between the bearing plate (17) and the claw pole rotor system (23); the primary winding (30) is disposed in a stationary core (36, 41, 47), and the secondary winding (31) is disposed in a rotating core (35, 42, 48), and the windings are coupled via an air gap (38).
摘要:
A device for voltage regulation for a generator driven by an internal combustion engine is described in which the voltage regulator is equipped with a load response travel function (LRF), which prevents a rapid rise in the exciting current when a powerful electric consumer is turned on. By means of a suitable trigger circuit which evaluates the engine rpm and thus the generator rpm, the load response travel function is blocked during travel when rpm values are falling, so that in this case, the voltage incursions that occur during an active load-response function are maximally averted.
摘要:
A device for controlling the output voltage of a rotary current generator is disclosed, in which a generator without exciter diodes is used, and the exciter current is furnished by the rectifier bridge of the generator. The exciter current is regulated with the aid of a first integrated circuit. In addition, a smart power high-side switch, which is regulated by an integrated circuit (IS2), is located in the exciter current circuit.
摘要:
In a voltage regulator for an alternator which charges a battery via a charging cable and supplies a vehicle mains with voltage, the output voltage is regulated as a function of the temperature of the battery. The voltage regulator has a power part and a control part, which includes a simulation device for storing data and for determining the temperature of the battery, and hence the optimum charging voltage, by simulation from the stored data. Further, the voltage drop between the alternator and battery can be calculated from the alternator current and the resistance of the charging cable while taking into account correction factors which take into account the different connections of the consuming devices between the alternator and the battery so that the calculated voltage drop and the optimum charging voltage for the battery can be used by the voltage regulator to set the voltage delivered to the battery.