In detail: do-it-yourself repair of the g222 generator from a real master for the site my.housecope.com.
In my vaz2107, the battery charge voltage disappeared, because the generator did not work. I dismantled the faulty G222 generator (aka G221 with a slightly modified rear cover - there is another threaded hole for attaching the Y112V relay).
Relay Ya112V is also a "tablet", it is a "chocolate" and is usually sold complete with brushes, if the brushes are not worked out, then there is no point in buying new ones. According to the auto repair manual, I checked the relay, as a result of which an open circuit was found in the relay circuit. There was another relay available, which recently came out of standing on the same car. I wondered what was going on and decided to open both. The relay turned out to be of two types.
4 ohms and everything fell into place. An autopsy revealed that there was an interturn short circuit of the wires between the layers of the excitation winding. I replaced the rotor with a rotor from the G221 generator. The assembly took place at lightning speed. I repeated everything from beginning to end. The problem has been resolved. It all took about 3 days. To preserve the purity of thought, beer was not taken.
there was also a relay made on conventional parts, in which only the KT837F output transistor had to be replaced, the rest of the transistors were intact. I replaced it like this: I drilled a rivet, bent the transistor so that it did not touch the metal plate, soldered it off the board. On the new transistor, I bent the legs like those of the burned out one, both in shape and in length. On the reverse side of the transistor, I applied a small amount of KPT-8 heat-conducting paste, soldered the transistor to the board, and instead of a rivet, pressed the transistor with a screw and nut. The screw was used with a head in “tie”, the nut was soldered to the transistor, and the screw head to the metal plate.
Video (click to play).
Regarding the parameters of stators and rotors of generators of various types: ________________________________________________________________________ Resistance of rotors, number of turns wire diameter
G221 = 4.3+0.2 ohm 500+3 0.69 mm G222 = 3.7+0.2 ohm 460+3 0.71 mm 37.3701 = 2,6+0.1 ohm 420+6 0.80 mm ________________________________________________________________________ Stator, number of turns wire diameter
D221 = 10 1.25 mm G222 = 9.0 0.95 mm 37.3701 = 8.5 1.00 mm ________________________________________________________________________
This unit is in question
To provide electrical energy to the electrical appliances of a VAZ 2105 car, as well as to recharge its battery while the engine is running, a generator is present in the car. Until 1987, units of the G 222 model were installed in the VAZ 2105, and later - the 37.3701 model. In both cases, the generator is a three-phase electrodynamic device, in which the sinusoidal voltage of each of the phases is rectified using a built-in rectifier. This part is a three-phase diode bridge of the VAZ generator, consisting of six silicon diodes. The voltage is produced by exciting the rectifier with three stator windings when changing the rotor poles under them. The rotor poles change polarity during its rotation inside the stator, and to increase the value of the magnetic fluxes, it has an electromagnetic field winding inside the magnetic cores. The rotor rotates through a belt drive from the front pulley of the engine crankshaft (injector) along with the pulley of the coolant pump.
The electrical circuit of the VAZ 21053 car differs from the instrument circuit of the model 2105 in that it has an electronic engine control system (ECM) and various additional sensors. Therefore, on the VAZ 21053, the power supply system has a different form of terminals than in 2105. The ignition switch of the first model, when the starter is turned on, turns off the secondary circuits and devices.
In general, the VAZ 21053 and 2105 generators are identical.But how to connect a generator to a VAZ 21053, because in this model the injector needs more power of the generated current? And how to connect a generator from "ten" for 80 A? The fastening, wiring diagram for the VAZ 21053 are the same with it, so there will not be a particular problem here.
The generator body consists of two aluminum alloy covers, tightened by four bolts and nuts, between which a round stator core is clamped. The rotor bearings are installed in the covers: the front one is in the through, the rear one is in the blind seat of the cover. The rotor rotates inside the stator and housing on two bearings. At the front end it has a slot for a key, a thread for a fan nut. An adjusting washer is installed between the front rotor and the front bearing, which is often forgotten when repairing the generator. At the rear end of the rotor shaft, in front of the rear bearing, two copper slip rings are pressed, isolated from the shaft and connected to the ends of the field winding.
A BPV6-50 rectifier is installed to the inside of the rear cover. It consists of two insulated horseshoe-shaped aluminum busbars, into which three VA-20 silicon diodes (valves) are pressed. The inner bus is isolated from the case, but connected to the generator terminal “30” bolt, while the other is in contact with ground. The legs of the diodes in pairs from each bus are bolted to the ends of the stator phase windings, and their other ends are connected together - a "star" connection. In the G 222 generator, a wire goes from this point to a terminal on the rear cover, from which a wire goes to terminal "85" of the RS-702 type charge control lamp relay. There are no wires at 37.3701 from the common point of the phase windings.
Brushes are pressed to the rotor slip rings by springs, one of which is connected to the "B" terminal, and the second to the W terminal of the voltage regulator installed on the brush assembly in the upper rear part of the generator. In 37.3701 there are three diodes connected at one end to the phase windings, and the second are connected to one point, the wire from which goes to the terminal Ш of the regulator relay and the terminal "61" on the rear surface of the generator. The diodes are connected in such a way that they pass positive half-cycles to the terminal "61".
The electronic voltage regulator is non-separable and since 1996 has been installed in a metal case, riveted to the brush holder. A capacitor is mounted between the body and terminal "30".
To control the battery charge level in a VAZ 2105 car, you need to monitor the output rectified voltage, which is maintained within 13 June 14.2 V. The regulator relay compares the voltage in the vehicle's on-board network with the reference one and, if this level is exceeded, reduces the voltage on the exciting winding , increasing the resistance between one of the rotor brushes and the "mass". When the voltage in the car's network decreases, the regulator lowers the resistance, increasing the current in the field winding and, accordingly, the voltage at terminal "30". Such cyclical processes occur at a frequency of 50-250 times per second.
The generator ground is connected to the vehicle ground through a housing attached to the engine block. Terminal "30" of the generator is connected to the "+" terminal of the storage battery and the on-board network of the car through the fuse box. Outgoing to the output on the back cover of the generator Г 222, the wire from the "zero" of the stator winding is connected to the terminal "85" of the PC-702 relay of the charge control lamp. The wire from terminal "87" of this relay through the connector Ш10 and Ш5 of the mounting block goes to the charge indicator lamp through the connector "2" of the instrument cluster.
In the 37.3701 generator, terminal "61" is connected with a brown wire with a white stripe to the Ш10 connector of the mounting block and through the Ш5 connector of this block and connector "2" of the instrument cluster is connected to the charge indicator lamp.
The generator model G 222 works like this. When the ignition "+" is turned on, the voltage from the battery is supplied to terminal "30", then to the excitation winding, and then through the open voltage relay to ground.From the ignition switch through the fuse 10 of the mounting block "+" is connected to the terminals "86" and "87" of the charge indicator lamp relay. Through the closed contacts of the relay, it is supplied to the lamp itself and through it along the "mass" of the car to the "-" of the battery. The lamp is on.
When the G 222 rotor rotates on the VAZ 2105, a voltage arises at the ends of its phase windings, which, increasing, begins to partially, and then completely supply the excitation winding, the on-board network and charge the battery. When the upper voltage level in the network is reached, the regulator relay increases the resistance in the excitation circuit and the generator keeps it within 13, June 14.2 V. A phase voltage is applied to the winding of the charge indicator lamp relay, and when its value is 5.03 oct 4 V, this is enough to open the contacts. The lamp goes out, indicating that all appliances are powered by the generator.
In the model 37.3701 generator, when the ignition is turned on, the excitation winding is powered through a control lamp, which is on at this time. When the rotor rotates, a voltage arises at the ends of its phase windings, it is rectified by a block of additional diodes, begins to feed the excitation winding and is fed to the charge control lamp. The lamp is on from the voltage difference at the terminals "61" and "+" of the battery. With an increase in the voltage at terminal "30", the indicated difference with the engine running decreases and reduces to 0. The lamp goes out, indicating that all devices are powered by the generator.
Sometimes, when tuning or repairing electrical equipment on a model 2105 before 1987, a generator is installed from a VAZ 2108 or 21053. And the car immediately starts having problems: then there is no charge, then the lamp does not burn. You need to connect the "+" of the on-board voltage to the lamp, and its second contact, bypassing the relay, connect to the terminal "61", then everything will fall into place.
The generator G-222 and 37.3701 (from 2108) were installed at 2105. So which one did you set? Most likely you installed the generator 37.3701 - read the topic Replacing the standard generator with a VAZ-2108 ead.php? T = 12163
