Such a device as a relay-regulator has three mandatory parts - a reverse current relay, a voltage regulator and a current limiter. There are three resistances in the body of the device itself. The body is attached to the electric machine with special slotted paws, inside which shock absorbers are installed and there are holes for bolts. Through the steel tire of the upper paw, the device is connected to the machine. A rubber gasket is placed under the cover screwed with several screws. The case together with the lid is painted with enamel.
A voltage regulator relay is necessary to stabilize the voltage parameters at the generator terminals in the event of an increase in the number of armature revolutions, and consumers are turned off. Without such a relay, increasing the voltage can have negative consequences. With a small number of revolutions, the relay-regulator does not enter into operation at all.
The design of such a device as a relay-regulator is quite simple: a yoke, a core, a magnetizing winding, a magnetic shunt, an armature (vibrator), springs, suspensions, a bracket, tungsten contacts, an adjustment plate, screws for the plate and terminals. The armature will be attracted to the core when current passes through its winding, however, the springwill permanently hold the contacts in the normal, closed position. You can change the force with which the spring is stretched by bending the bracket. You can change the gap between the core and the armature with an adjusting plate.
When the voltage at the generator terminals increases, the voltage in the excitation winding also increases. At a low armature rotation speed, the contacts will be closed, since the magnetic flux created by the current on the core winding will be too small. With an increase in armature speed, the voltage at the clamps also increases. This will also increase the current in the winding. Along with the increase in current, the magnetic flux will increase. Under the action of the magnetic flux, the armature will be attracted to the core. The contacts will open and the circuit will break. When the voltage decreases, the contacts will close under the influence of the armature spring, and the resistance will turn off from the circuit. This process is continuously accompanied by changes in the number of revolutions of the armature. Thus, the increase in voltage at the terminals with increasing RPM will be limited by the inclusion of resistance in the circuit.
Within the framework of this topic, it is necessary to mention such a device as a generator relay-regulator. By applying the desired voltage value to such a part of the generator as the rotor, this relay sets the output parameters for the generator.
Such a device can have a variety of designs and a different principle of operation. It is important to note the presence or absence of brushes in such a relay. Also, modern devices called relay-The regulator can change the battery charging voltage depending on the load of the generator, air temperature and humidity. In addition, they inform the engine control units of the parameters of the generator.
Relay operation is monitored using a red control lamp. It is included in the circuit after the ignition is turned on.
