1 - V-belt drive pulley; 2 - fan; 3 - bearing cover on the drive side; 4 - stator winding; 5 - connecting bolt; 6 - rotor with slip rings; 7 - cover from the contact ring side; 8 - rectifier with diodes; 9 - plastic cover; 10 - voltage regulator with brush holder.
The three-phase alternator located on the side of the engine rotates continuously with the engine and supplies electricity not only to the ignition system and injection system, but also to the connected consumers of current. The remainder of the electricity produced is diverted to the battery.
Alternator
The Renault 19 uses an alternator, the commonly accepted term being "a machine for producing light" (literal translation from German) is incorrect because it supplies energy to various current consumers and is a small power plant.
The generator is driven by the engine via a V-belt and is virtually maintenance-free, as it does not require lubrication. The carbon brushes in it last 80,000 km or more.
The alternator produces the electric current taken from these brushes, due to the occurrence of magnetic fields, which are formed by the excitation windings. In this case, alternating current is generated. Since the battery must be charged with direct current, semiconductor diodes ensure the conversion of alternating current to direct current. Diodes are very sensitive to high voltages.
Handling the generator
1. When the engine is running, do not remove or connect the wires between the battery and the generator. This may cause a voltage surge and the diode will burn out.
2. The generator must not operate with an incorrectly connected or faulty battery. The battery serves as a generator voltage limiter and to some extent acts as a "buffer" against excess voltage.
3. All wires connected to the generator-battery-ground connection must be secured very tightly. One loose contact can cause significant voltage surges.
4. When quickly charging the battery and when performing electric welding work in the body, both wires should be removed from the battery.
Power of different types of three-phase generators
(This article is taken from the website: Renaultbook.ru)
Depending on the engine type, vehicle modification, special equipment and place of sale, generators from 3 manufacturers can be installed on the Renault 19. The generator power varies, depending on the type, from 60 to 110 A and, accordingly, from 840 to 1540 W. The generator produces two-thirds of this power already at 2000 rpm. The ratio of the generator speed to the oilcloth shaft speed is 1:2, therefore almost 2/3 of the generator power is realized at speeds that are slightly higher than idle speed.