Relay-regulator - design and principles of operation

Such a device as the relay-regulator is composed of three required parts-relay reverse current, the voltage regulator and current limiter. In the case of the device there are three resistance. The body is attached to an electrical machine is a special paws with slits, in which the shock absorbers are installed and there are holes for bolts. Through the steel tire and the upper legs of the device connected to the machine. Under screwed a few screws in the cover and put a strip of rubber. The housing together with cover painted with enamel.

Relay-voltage regulator is needed to stabilize the voltage at the terminals of the generator in the event of an increase in the number of revolutions of the armature, the service disconnect. Without this relay, the voltage increase could have negative consequences. With a small amount of the rpm relay-the regulator generally does not work.

The Design of such devices as relay-regulator are quite simple: a yoke, a core, a magnetizing winding, a magnetic shunt, anchor (vibrator), coil springs, suspension, bracket, tungsten contacts the adjustment plate, the screws for the plate and the terminals. The anchor is attracted to the core when a current is passed through its winding, however, the spring will always keep the contacts in the normal closed position. To change the force with which the spring is stretched, it is possible by folding the bracket. To change the gap between the core and the armature can adjusting plate.

increasing the voltage at the terminals of the generator increases and the voltage in the excitation winding. At low speed of rotation of the armature contacts will be closed, since the magnetic flux generated by the current in the winding core is too small. For increased speed of the armature increases and the voltage at the terminals. This will increase and the current in the winding. Along with the increase of current will increase the magnetic flux. Under the action of magnetic flux anchor will be attracted to the core. Contacts will open, and the chain will break. When the voltage drops, the contacts will close under the influence of spring on the anchor, and the resistance is off from the chain. This process is continuously accompanied by changes in the number of revolutions of the armature. Thus, the increase in load voltage when the revs increase will be limited to the inclusion of resistance in circuit.

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In the context of this topic it is necessary to mention about such a device as relay-regulator generator. By feeding the desired values of voltage on a part of the alternator like the rotor, this relay sets the output parameters of the generator.

Such a device may have different performance in design and different principle of action. It is important to note the presence or absence of brushes of such a relay. A modern device called a relay-regulator can change the charging voltage of the battery depending on load, generator, air temperature and humidity. In addition, they inform the control units of the engine operating parameters of the generator.

Control of the relay is carried out using the red test lamp. It is included in the circuit after switching on the ignition.