Overvoltage alarm circuit for vehicle generator with false actuator prevention

摘要

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.