The generator produces three-phase alternating current. Since direct current is needed to charge the battery, the alternating current is rectified using power diodes. These diodes also prevent the battery from draining when the car is parked. The generator is practically maintenance-free, since there is nothing to lubricate in it. Even contact coals can easily withstand 100 thousand kilometers. Leave the repair of the generator behind the workshop.
The design principle of a modern three-phase current generator for powering the electrical equipment of a car. At least six power diodes are pressed into the heat sinks (position 6) which rectify alternating current. 1 - housing, 2 - stator, 3 - rotor, 4 - electronic excitation rheostat with brush holder, 5 - contact rings, 6 - rectifier diode, 7 - fan
Voltage regulator
The faster the generator rotates, the more, like a bicycle generator, the voltage increases. Neither consumers nor the battery can withstand these voltage drops. Therefore, a voltage regulator is used to protect against overvoltages and prevent overcharging of the battery.
The regulator is screwed to the generator. Depending on the temperature of the battery and the surrounding air, it regulates the voltage in the range from 13.8 to 14.5 Volts (the so-called 14-volt tolerance field).
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