Abstract: In a control device of an a.c. generator for a vehicle which is designed in such a way that for a first time right after an engine having been started, an output of the a.c. generator is suppressed to a minimum value, and for a second time following the first time, the output of the a.c. generator is gradually increased from the minimum value up to a maximum value to stabilize the revolution of the engine, the invention is intended to shorten a period of time required to suppress the output of the generator at high temperatures to thereby prevent a reduction in the charging performance of a battery. At high temperatures, a time interval of a timer 402, to which the first period of time is set, and a discharging time constant of a capacitor 407, which defines the second period of time, are both shortened on the basis of an output a of a temperature sensor 410.

Abstract: A controller for a car AC generator which eliminates the need for a drive signal supplied by a key switch and stabilizes the power generation of an AC generator at the start of an internal combustion engine. The voltage regulator of the controller comprises trigger means for supplying a field current from a battery to a field coil by detecting a drop in battery voltage.

Abstract: Only when it is detected by a frequency/voltage converter that the frequency of the phase output of an AC generator is higher than a predetermined frequency, a smoothing capacitor is charged. Therefore, the charging of the smoothing capacitor is prevented at the time of a generation stop.

Abstract: A vehicle generator controller for regulating the output voltage from a generator which charges a battery mounted on a vehicle comprises battery voltage detection means for detecting the drop of a battery voltage, a switching element for controlling the field current of the generator, gradual increase control means for gradually increasing the current generated by the generator by gradually increasing the switching element by intermittently operating the switching element when the battery voltage drops and gradual increase prohibition means for canceling the gradual increase control at the beginning of the drop of the battery voltage and gradually increases the field current after the conducting ratio of the switching element is set to 100%. With this arrangement, the vehicle generator controller suppresses a torque shock caused in response to the turn-on of an electric load as well as sufficiently suppresses the drop of a battery voltage.

Abstract: A control device for a vehicle generator which includes a semiconductor switching element for controlling the flow of current in a field winding of a generator driven by a vehicle internal combustion engine; a control unit which outputs a control signal for turning the semiconductor switching element on and off to thereby control the output voltage of the generator; and a field current detecting element for detecting the field current. The control unit has a field current limiter which outputs the control signal, depending on the output from the field current detecting element. The field current detecting element and the field current limiter are constituted as a hybrid integrated circuit. The field current detecting element and the field current limiter have respective ground patterns coupled at a location other than the ground terminal of the hybrid integrated circuit.

Abstract: A control device for a vehicle A.C. generator which is used to supply a vehicle load such as a battery. The control device includes a semiconductor switching element for controlling a field current in a field winding of the generator. The control device also includes a ground pattern conductor arranged between a power source terminal connecting the semiconductor switching element and the load and a control signal input terminal for inputting a control signal to the semiconductor switching element. The ground pattern conductor is further connected to a ground terminal of the semiconductor switching element. This arrangement affords protection from short circuiting of the power source terminal and the control terminal.

Abstract: A vehicle generator controller comprises a voltage detection circuit for outputting a voltage detection signal D to regulate a generated voltage VG in accordance with a battery voltage VB, a gradual increase control circuit for outputting a gradual increase control signal E in response to the voltage detection signal D and a switching element for intermittently controlling a field voltage in response to the gradual increase control signal E, the gradual increase control circuit includes a smoothing circuit for smoothing the voltage detection signal D by a charging time constant and a discharging time constant and a comparator for outputting the gradual increase control signal E by comparing the smoothing signal with a triangle voltage, both the charging time constant and the discharging time constant of the smoothing circuit are set to one second or more and the gradual increase control signal E moves to a waveform for gradually decreasing the field voltage when the battery voltage increases.

Abstract: A vehicle alternating-current generator control device having a single in-line molded package type control component with its leads arranged on one side. Disposed on the control component is an extension adapter with its ends connected to the leads of the control component and other ends connected to conductor links. A holder designed for an open-type control component is thus used for a single in-line molded package type control component.

Abstract: An apparatus for controlling an output from an AC generator for a vehicle is provided which enables wiring from an external control unit to a voltage regulator by using only one wiring line, and which is capable of adjusting an output voltage of the AC generator to a usual value in accordance with a duty ratio of a control signal supplied from the external control unit, and linearly controlling the generator output voltage to a desired value in relation to a change in the level of the control signal.

Abstract: A control device for an AC generator having an armature coil and a field coil includes a rectifier for rectifying an AC output of the AC generator, which is driven by an engine, to excite the field coil. A storage battery is adapted to be charged by the rectified output of the AC generator rectified by the rectifier for supplying power to the field coil when the engine is started. A switching element switches over a connecting condition of the storage battery in such a manner that the storage battery is connected through the rectifier to the field coil to supply power to the field coil when the engine is started, the switching element being connected to an AC output of the AC generator for supplying the AC output voltage of the AC generator as a drive voltage to the second switching element.

Abstract: An output power control device for an automotive AC generator includes a field current limiter circuit 9 for controlling the duty factor of the power transistor 305 coupled in series with the field coil 102A of the AC generator 1A, which is supplied with a maximum field current twice the conventional level. A frequency-to-voltage converter 903 converts the input frequency to a voltage corresponding to the rpm of the AC generator 1A, and a comparator 909 compares the sawtooth waveform generated by a sawtooth waveform generator 908 with the output of the frequency-to-voltage converter 903, the upper level of which is limited under a predetermined level by resistors 904 through 906 and a diode 907. When the rpm of the AC generator 1A exceeds a predetermined frequency, the pulse train generated by the comparator 909 reduces the duty factor of the power transistor 305, thereby controlling the level of the output current generated by the AC generator 1A.

Abstract: A vehicular a.c. generator comprising a stator coupled to a pair of brackets on either side, a rotor secured to a rotary shaft supported with both brackets via respective bearings, and a pair of fans fitted to the core portions on either side of the rotor, wherein each bracket has a plurality of suction ports at one end and a plurality of exhaust ports in the outer peripheral portion thereof, wherein the inner edge face of one bracket axially faces vanes of the fan with a small clearance therebetween and wherein the generator is ventilated and cooled by the fans as the rotor rotates, is characterized in that a gently-sloping annular depression is provided in the inner edge face of the one bracket facing the vanes of the fan, the depression being made in a clearance that axially grows larger from the axial center of the suction part toward both the external radial positions thereof.

Abstract: An alternating current generator with a pulley (17) for transmitting driving force from an engine to a rotor and/or to an auxiliary machine, having an external axial fan (18), rotating unitedly with the pulley (17), for drawing external air into the inside of the AC generator through air intake holes provided on both covers of the AC generator housing. The pulley (17) has air-intake vents (17a) axially extending through the pulley to permit relatively cold air to pass therethrough. At each such vent (17a), a guide member (17b) between the blades of the external axial fan (18) and the air intake holes directs the relatively cold air drawn in by the axial fan, to cool the interior components of the AC generator. The guide members (17b) further serve to shut out the outside air that has been heated from having passed near the outer surface of the housing.

Abstract: A setting device for a vehicle generator, comprises a stay attached to an engine of a vehicle and having a first through hole; a front attaching leg portion and a rear attaching leg portion of the vehicle generator, both provided on opposite sides of said stay, one of the front and rear attaching leg portions having a second through hole and the other having a fitting hole and a polygonal tube portion; a cylindrical attaching-span adjusting bush fitted movably in the fitting hole; a polygonal nut housed in the tube portion communicating with the fitting hole with a gap between the nut and the tube portion so as not to be rotatable and removable, the nut being coaxially adjacent to the attaching-span adjusting bush; and a bolt passed through the second through hole, the first through hole and the attaching-span adjusting bush so as to be fixed in the nut.

Abstract: A protection circuit for use in a vehicle mounted generator 1 equipped with a voltage regulator 3 having an output transistor circuit 306 connected to a field winding 102 of the generator and an overvoltage alarm device 4 having an overvoltage detector, comprises diodes 410, 411 for selectively connecting an output of the overvoltage detector to the output transistor circuit so that the transistor circuit is turned off only when an overvoltage caused by the generator which becomes out of control of the voltage regulator due to disconnection of a generator output to a battery to be charged thereby and/or of the battery to the voltage regulator is detected to terminate a power supply to the field winding until the output voltage of the generator reduces to a preset level.

Abstract: The field current of a vehicle mounted generator is controlled by a first detecting device 301, 302 for detecting a voltage of a battery to be charged by the generator with a first reference level, when a connection of the first detecting device to the battery is complete, and by a second detecting device 303, 304 for detecting the output voltage of the generator with a second reference level which is substantially the same as the first reference level, when the connection is broken.

Abstract: A control device for a vehicle generator includes an acceleration detector (9) whose output disables the generator during periods of acceleration to attendantly reduce the engine load. A phase voltage regulator (11) responds to a voltage at one phase (P) of an armature winding of the generator to override the acceleration detector output and increase the generator voltage to a limited, detection level when such voltage is reduced below a predetermined level.

Abstract: The output current and drive torque characteristics of a vehicle generator during cold, startup periods are approximated to those of a warmed up generator by sensing the field winding current, and interrupting it for a time period prolonged by a feedback/charging capacitor (904) whenever it exceeds a reference level. The field winding current never exceeds the reference level when the generator is warmed up, whereupon the interrupting circuitry has no effect.

Abstract: A control device for a vehicle mounted generator 1 includes a rectifier 2, a voltage regulator 3 and an overvoltage alarm circuit 4 which includes an overvoltage detection level modifying circuit which renders the alarm circuit insensitive to a temporary overvoltage due to the disconnection of a relatively heavy electrical load 6 of the vehicle from the battery 5. The detection level modifying circuit functions to change the junction potential of a voltage divider supplying a comparator input.

Abstract: A control apparatus for a vehicular generator for use in an automobile, etc., in which the temperature of the generator is detected so as to control switching of the field current of the generator when the temperature of the generator is below a predetermined value, so that the cold output current and cold drive torque of the generator are substantially the same as the hot output current and hot drive torque of the generator.