CONTROLLER FOR CHARGING GENERATOR OF VEHICLE

摘要

PROBLEM TO BE SOLVED: To control the rise of detected voltage by the detection of a diode of high frequency noise of a radio equipment, etc., to realize a controller of a power generator for a vehicle which can prevent malfunction such as erroneous stop of power generation of a charging generator and erroneous lighting of a charging display lamp. SOLUTION: A battery voltage detecting terminal S is connected to a generated voltage output terminal B via a diode 301 having reverse recovery time of 1μs to 10μs and a resistor 302. A voltage V1 between the resistors 303 and 304 is compared with the reference voltage 307 with a comparator 306 and its output signal controls conductive and non-conductive conditions of a transistor 308 for magnetic field current limitation. The voltage V1 and the reference voltage 310 are compared with the comparator 309. When the voltage V1 exceeds the reference voltage 310, a transistor 311 for driving the charging display lamp becomes conductive to light the charging display lamp 4. When the terminal S is radiated with a radio frequency, forward and backward currents are almost equal because the reverse recovery time of the diode 301 is very slow and thereby the voltage V1 hardly changes to prevent variation of the generated voltage and erroneous lighting of display lamp 4 due to over-voltage detection.