Cars equip with alternating current generators. Depending on model and the electric equipment established on the car generators of various capacity can be established. At installation of an additional electric equipment check up, that capacities of the generator was enough for a food of the new consumer.
The generator drive is carried out поликлиновым by a belt from a cranked shaft of the engine.
The generator represents the three-phase synchronous electric car with electromagnetic excitation. For transformation of an alternating current in constant the rectifier is built in the generator on diodes. Pressure is regulated by the built in microelectronic regulator of pressure.
At work of the generator the electric current proceeding on a winding of excitation, creates a magnetic field round poles of a rotor. At rotor rotation under coils статора alternately pass rotor poles, the magnetic stream varies on size and a direction and creates in a winding статора electromotive power.
At high frequency of rotation of a rotor of the generator when pressure of the generator becomes more than 13,6–14,6 In, the pressure regulator is locked also a current through a winding of excitation does not pass. Pressure of the generator falls, the regulator opens and again passes a current through an excitation winding. The above frequency of rotation of a rotor of the generator, the is more time of a closed condition of a regulator, hence, that pressure on a generator exit more strongly decreases. Process of lock-out and regulator unlocking occurs to high frequency, therefore pressure fluctuations on a generator exit are imperceptible, and it is almost possible to consider to its constants supported at level of 13,6-14,6 Century
At generator checks, and also at car operation observe following security measures not to put the generator out of action:
Do not suppose work of the generator with the disconnected storage battery. At work of the generator with the disconnected battery in an onboard network of the car there are pressure increases at switching-off of any consumers of the electric power, leading to failure of the electronic equipment of the car, including a regulator of pressure and выпрямительного the generator block.
Do not check working capacity of the generator on "spark", even short-term connection «плюсового» a conclusion of the generator with "weight". Thus through выпрямительный the block proceeds a considerable current and its diodes are damaged. Check pressure of the generator only the voltmeter.
"The minus" plug of the storage battery always should incorporate to "weight" of the car, and «плюсовая» to be connected to a generator conclusion. Wrong (return) connection of the battery will sharply raise a current passing through diodes of the generator, and they will fail.
Do not check diodes pressure more than 12 in or мегомметром as it has too high pressure for diodes. In this case at check diodes will be punched (there will be a short circuit). At check of isolation of electroconducting by an ohmmeter disconnect all wires from the generator.
Necessarily disconnect all wires from the generator and the storage battery at electric welding of knots of details of a body.
Check chains and knots of an electric equipment and eliminate malfunctions at the idle engine and the disconnected storage battery.