Abstract: To provide a vehicular charging and generating system capable of issuing alarm to a driver even when failure is caused in a rectifying apparatus of the vehicular charging and generating system, failure detecting means issues alarm when a difference between an output voltage of generated voltage detecting means and an output voltage of average phase voltage detecting means is higher than first difference voltage set when failure is not caused in a rectifying element or when the difference is lower than second difference voltage set when failure is not caused in the rectifying element.

Abstract: When a MOS transistor is turned off, a forward current flows into a diode connected to the MOS transistor. When the MOS transistor is conducted, a reverse bias is applied to the diode. When the MOS transistor is turned on during the reverse recovery time of the diode, a short-circuit current flows into the MOS transistor, the diode, and a battery connected in series with the diode and the MOS transistor. In this case, an overcurrent flows through the wiring of the battery momentarily, and electromagnetic wave generates from the wiring. Accordingly, noise caused by the electromagnetic wave is generated in an antenna to a radio receiver. The drain current of the MOS transistor is gradually increased by a delay circuit, and the MOS transistor is shifted from a completely turned-off state to a completely turned-on state with a time period longer than a reverse recovery time of the diode. Consequently, no reverse current flows through the diode.

Abstract: To provide a vehicular charging and generating system capable of issuing alarm to a driver even when failure is caused in a rectifying apparatus of the vehicular charging and generating system, failure detecting means issues alarm when a difference between an output voltage of generated voltage detecting means and an output voltage of average phase voltage detecting means is higher than first difference voltage set when failure is not caused in a rectifying element or when the difference is lower than second difference voltage set when failure is not caused in the rectifying element.

Abstract: A control device for a motor vehicle electric generator takes into account the relationship between field currents flowing through field windings of charging generators having different generation powers and output currents. The field current is increased once and instantly at the time of loading but prior to suppressing the increasing speed of the field current. The amount of the increase of the field current is controlled to be proportional to the field current before the loading. The control device according to the invention can be used for charging generators having different power generation capacities, and the battery voltage drops at the moment when switching in a motor vehicle electric load are reduced to substantially the same level.

Abstract: A power source system for a vehecle is disclosed. The system has a generator driven by an internal combustion engine, a control equipment for controlling the generator, a battery, a heater which is heated by the generated output of the temperature detecting means for detecting generator, and a temperature of the heater. The system has a switch between the heater and between the generator and the generator and the battery. The heater and the battery are connected in parallel to each other.

Abstract: The object of the invention is to provide a charging generator 1 which can avoid occurrence of overvoltage due to failure of equipment, which comprises: an a.c. generator 10 having armature windings 10a, 10b, 10c and a field winding 10d for generating an a.c.; a rectifier 11 having a plurality of power zener diodes 11a-11f having an intrinsic breakdown voltage Vz for converting the a.c. output from the armature windings to a d.c.; a current inhibit means which receives the d.c. output from the rectifier via field winding 10d and inhibits a field current which flows through the field winding; a voltage detection means for detecting a voltage of the d.c. output from the rectifier; and a voltage regulator 13, which includes a protection control means for controlling the current inhibit means in accordance with a result of judgment which is larger between a detected value of the d.c. voltage and a predetermined protection cut-off voltage VB, for regulating the d.c.

Abstract: A vehicle alternating-current generator control system comprising a voltage command unit for variably controlling a reference voltage according to the state of an internal combustion engine, and an arithmetic unit for storing the difference between a target generation voltage commanded by the voltage command unit and a battery voltage detected by a voltage detection circuit and adding a voltage corresponding to the voltage difference to a command voltage generated by the voltage command unit.

Abstract: The present inventions provides a generated-voltage regulator for an automobile, in which the on state of a key switch can be detected securely without being affected by a change in ambient temperature or the like. According to a selected embodiment, when a generation failure occurs in a power generation circuit 12, a power MOS FET 111 is turned on and off periodically so that a charge lamp 3 is lighted. The on/off state of the MOS FET 111 is detected by a detecting section 1121 of a voltage detecting circuit 112. Being supplied with an on signal from the detecting section 1121, a holding section 1122 turns the level of its output signal c to an "H" level only for a predetermined period. As a result, the key switch 2 is not judged to be off even in the case where the MOS FET 111 is turned on, and the on state of a switch 116 is maintained.

Abstract: A charging generator having a self-diagnosis function includes a self-diagnosis circuit, a storage device and an output device. When an anomaly is detected, the charging generator with a self-diagnosis function stores data concerning at least one anomalous condition of the generator and the contents of the anomaly in the storage device, and outputs the anomalous data concerning the generator or the contents of the anomaly, which are stored in the storage device, by inputting a specific signal from the outside.