Features of the VAZ-2107 generator, schemeconnection to the power supply and charging system - this is what a motorist should know. If the voltage generation stops, the machine can not work for a long time on one battery. Carburetor engines with contactless ignition with an average level of charge will be able to last no more than one day trip with the lights off. Injectors will operate without a generator for several hours, since the pump motor and the ECU consume a large current.
The charging circuit of the VAZ-2107 generator is practically the same as the one used on all other cars.
A proven and reliable design for years,which contains a minimum of elements. And this means that there is nothing to break. The generator is driven by the crankshaft of the engine with a flexible belt. The main parts of the electric machine:
This design is not only a generatorVAZ-2107. The scheme of its connection is not much different from that used on more modern cars of foreign production. Structurally, various models differ in the large size of the windings, in the dimensions of the generator, in the presence of water cooling.
The scheme of the VAZ-2107 generator (injector) is smalldiffers from the one used on obsolete carburetor engines. One difference is that the design is more modern and capable of producing more current. The rotor includes an excitation winding, which creates around itself a constant magnetic field. And this is one of the conditions for the generator set operation. The second condition is movement. In other words, if a voltage is applied to the excitation winding, but the rotor does not rotate, current generation will not occur. As soon as the rotor starts to move, an alternating voltage will immediately appear on the stator winding.
The stator is a fixed part of the generatorInstallation, which with the help of brackets fixed on the engine block. The winding is on the core of transformer steel. When the device is operating, an electromotive force appears in the winding. One small nuance - three stator windings on the stator, therefore, three-phase voltage is produced. By means of such a circuit, it is possible to reduce ripple currents during operation. But it also requires several stages of transformation, a more complex rectifier circuit.
The carburetor scheme of the VAZ-2107 generator with the old-style motors consisted of a remote-type voltage regulator.
Separately in the podkapotnom space was a box with the device. The regulators can be of the following types:
Using the voltage regulator,constant supply of field winding. After all, there is one peculiarity of generating sets: if the magnetic field of the rotor is changed, the voltage at the output of the device will vary proportionally. The frequency and current will remain the same. On modern modifications of cars, relay-regulators combined with a brush holder are used. The cost of such a device is much lower.
Block of diodes in the charging circuit of the battery fromgenerator VAZ-2107 consists of six semiconductors mounted on a horseshoe plate. It is mounted on the back cover and allows with its help to cool the diodes. Semiconductors convert a three-phase alternating voltage into a constant unipolar one.
Using a capacitor in the back of the deviceit turns out to get rid of the variable component at the output of the generator. The problem is that after straightening, there will still be a slight ripple of alternating current. A capacitor in the replacement circuit works as a conductor when AC current flows and as a break at a constant. In other words, according to the Kirchhoff theorem, the entire variable component will simply be closed and will not pass further.
The battery and VAZ-2107 generator are connected tothe scheme is very simple. From the power output of the generator there is one thick wire to the positive terminal of the battery. The minus is the engine casing and the body of the car. Voltage to the regulator comes through the unit with a lamp and a diode mounted in the instrument panel. When the supply of the field winding stops, a lamp with a red battery icon lights up in the device.
When the motor is stopped, the entire power supply is suppliedfrom the battery. When starting the engine, the generator is turned on. And the current level is enough to satisfy the need both in charging the battery, and in powering all consumers. With the help of the regulator it is possible to maintain the voltage at the same level, regardless of the rotor speed. If it were not for the relay-regulator, the voltage would vary in the range of 12-30 volts.
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