A voltage regulator is a device that changes the electrical voltage at the output of the electric motor when a control signal is supplied to it. The VAZ 2114 voltage regulator is built into the generator and provides stabilization of the output voltage by changing the excitation current in the generator.
RN structurally is an electromagnetic relay and a series-connected transistor circuit with resistances, which are themselves connected in series to the field winding on the stator of the generator. The physical meaning of the activity of an electronic launch vehicle is as follows.
The generator voltage is unstable and changes abruptly. With its increase, the electric relay turns on an additional resistance, which limits the excitation current and the voltage decreases. If, on the contrary, the voltage drops below the permissible value, the relay disconnects the resistance and the magnetic flux in the field winding increases, and the generator voltage increases. Since all this is a high-frequency process, the voltage in the automobile power supply network is kept within the allowable stable value.
If we consider the LV in a practical sense, then this device solves the following tasks:
- this device activates an electric generator;
- it exercises autonomous control over the output of alternating current;
- maintains a constant set voltage value, regardless of the amplitude of oscillations issued by the primary windings of the generator.
For a generator model 9402.3701, which is mounted on a VAZ 2114, a voltage regulator 611.3702-14 is installed. This appliance is assembled with a brush assembly. RN technical characteristics:
- rated voltage supported by the regulator - 14.5 V;
- rated current - 5 A;
- maximum weight - 60 g;
- size - 66x55x32.
Operation, modifications and replacement of the voltage regulator on the VAZ 2114
Standard voltage regulators for the VAZ 2114 have a feature that is associated with the fact that it is assembled with a brush holder. Despite the fact that these two devices perform different functions, they are assembled into a one-piece device and if one of them fails, the entire set has to be removed.
A signal for checking and replacing the PH can be a low voltage of the on-board network of the VAZ 2114 or a drop in the illumination level of the headlights. It is possible to determine this by observing the capacity of the on-board battery. When the voltage supplied by the generator drops, the battery does not charge well and the battery capacity drops. If, when monitoring the pH on a cold engine, the voltage is significantly lower than 14.6 V, then the regulator must be replaced.
At the same time, if the PH is in good condition, and when checking the brush assembly, it was found that the brushes are worn out or burnt, then the entire set will have to be replaced. This should be done if they protrude from the brush holder by less than 5 mm.
Replacing the VAZ 2114 voltage regulator is possible with your own hands. This process is relatively straightforward, but it requires a careful approach.
Attention! The electrical parts of the vehicle must be kept clean. Any contamination leads to a decrease in the performance of the electrical part.
There, where the voltage regulator on the VAZ 2114 is located, access is open and nothing interferes with the work. The launch vehicle is located under the plastic cover of the generator, which covers the entire contact group of this generating set.
- Before starting work, you must disconnect the contact wires from the battery.
When working with electrical equipment on a car, the battery must be disconnected without fail in order to exclude voltage surges or short circuits, as a result of which important devices can be damaged or a fire can occur.
- Then you need to find a contact actuator with a block, which is put on the output of the generator "D". This block needs to be disconnected.
- Remove the protective rubber cap from the "+" terminal. Using the key "13", unscrew the nut that secures the outer wires to the contact stud and remove them from the stud.
- By snapping off the three clips on the sides of the plastic cover, remove it. It is necessary to help with a flat screwdriver to squeeze its edges around the circumference from the area of contact with the generator case.
- The voltage regulator is secured with two screws. Use a Phillips screwdriver to unscrew them.
- Disconnect the block of wires suitable for the PH and pull out the regulator body together with the brushes.
- Installation of a new LV is carried out in the reverse order. In this case, it is necessary to clean all the contacts well and check the density of their fastening, otherwise the indicators of this device may be incorrect.
In addition to standard regulators, it is allowed to use other devices that support the specified characteristics. Such devices include the RENATO thermo-optimized LV and a three-level voltage regulator.
- PH "RENATO" regulates the charging within the voltage range of 13.6 - 14.7 V, depending on what temperature of the electrolyte is maintained in the battery. The temperature sensor is installed on the storage battery and connected with a wire to the PH. Sold complete with a regulator.
- The three-level PH is designed to extend the battery life. In addition, it ensures the optimal voltage of the generator in different operating conditions and, accordingly, more efficient operation of the lighting equipment and the heating system of the machine.
The design of this device includes a three-position switch, which has several positions and, accordingly, modes:
- in the minimum position, designated as "min", the voltage of 13.6 V is maintained. This position is provided for work in difficult conditions - at high air temperatures, more than plus 20 degrees, prolonged movement "uphill" or in traffic jams;
- in the middle position of the switch, marked "norm", the voltage corresponds to 14.2 V. This mode provides for the operation of the generator with a warm engine and an ambient temperature from zero to plus twenty degrees;
- when the switch is set to "max", the PH maintains the voltage in the range of 14.6 - 14.7 V. This mode is required during cold start, engine operation at low temperatures and at full load from switched on consumers.
A three-level prefabricated launch vehicle can be installed without any special difficulties. In place of the old regulator, a new brush holder is inserted, the wiring from it is passed through the plastic cover of the generator. The new device is mounted on the engine compartment housing in any convenient place and provides reliable ground contact. The wire connecting the device itself and the brushes must be isolated from high-voltage wires and the machine body. For more details on how to install a 3-level regulator, we suggest watching the video:
