SU572889A1 - Contact-transistor voltage regulator - Google Patents

Description

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ISO. Brent relates to the field of electrical engineering, in particular to automotive engineering electrical equipment.

Contact-transistor voltage regulators are known for autotractor alternators 1 and 2.

The closest to the isoorrhea of the technical essence and the achieved effect is a contact-transistor voltage regulator containing a regulating transistor, the collector of which is connected to the generator excitation winding, and the emitter of the semiconductor diode is with a zero output of the stator generator windings. "A star, a control relay and a relay element of protection against short circuits of the excitation winding to ground, the winding of which is connected to the collector of the regulating transistor and through a normally closed Tide pereklyuchayuschies control relay contacts with a zero terminal of the stator windings, and the normally open contacts included in the reference circuit regulating transistor 3J. However, such a voltage regulator is not reliable enough to operate a possible breakdown of the collector junction and burnout of the base transistor regulator circuit when the field winding is shorted to the positive output of the generator, since the winding is

the protection element is de-energized due to an increase in the generator voltage and the opening of the normally closed contacts of the control relay.

The aim of the invention is to increase the reliability of the controller. This is achieved by introducing an electromagnetic protection relay into the proposed voltage regulator, the winding of which is connected between the output for

connecting the generator excitation winding and the output for connecting the zero point of the generator stator windings through an additional semiconductor diode, shunted by a normally closed contact of the control relay, the collector of the regulating transistor connected to the output for connecting the generator excitation winding through the normally closed contact of the protection relay.

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The drawing shows the electrical circuit of the voltage regulator described.

The voltage regulator contains a regulating transistor 1, an electromagnetic control relay with Winding 2 and switching contacts 3, an electromagnetic protection relay with a winding 4 and normally closed contacts 5, an additional semiconductor diode 6 and a limiting resistor 7. The diagram also shows the generator 8 alternating current with excitation winding 9 and ignition switch 10.

The voltage regulator is connected to the on-board power supply network using output terminals: VZ with positive output of generator 8 through ignition switch 10, O with zero output of stator windings of generator 8, W with winding 9 of generator 8, M with generator mass.

The regulator in the normal operating mode operates as a normal contact-transistor voltage regulator. There are no false positives of the protection relay either before the voltage regulator enters the operation or during its operation, since in the first case, when the normally closed switching contacts 3 of the control relay are closed, the winding 4 of the protection relay is bridged by the open the saturation mode of the control transistor 1 and the voltage across it are less than the operation voltage, and in the second case the winding 4 of the relay is de-energized because the contacts 3 of the control relay switch and operate on the second normally open th stage, and an additional diode 5 is included in the non-conducting direction for this case.

In emergency mode, the protection relay operates as follows.

When the excitation winding 9 of the operating generator 8 is shorted to ground, the voltage of the latter decreases, and the switching contacts 3 of the control relay return to their original normally closed state and connect the winding 4 of the relay to the total voltage of the generator. The protection relay is activated and by its contacts 5 disconnects the regulating transistor 1 from the excitation winding 9 and the short circuit point.

When the excitation winding 9 closes the generator 8 to the positive output of the generator, the winding 4 of the protection relay, in spite of the open contacts 3 of the first normally closed stage of the control relay, connects the full voltage of the generator through an additional semiconductor diode 6. The protection relay operates with its contacts 5 times (snatches the emergency current circuit 4eipe3 transistor: positive output of the generator - place of the positive circuit on the excitation winding 9 - control terminal W - contacts 5 of the protection relay - collector-base junction p Control transistor 1-resistor 7-closed contacts 3 of the second normally open step: 1 control relay - About controller-zero output of the stator generator 8, disconnecting the transistor 1 from the place of the circuit.

Thus, turning on the protection relay winding between the start of the excitation winding and the zero output of the stator generator windings through an auxiliary diode connected in parallel with the normally closed switching contacts of the control relay and the normally closed contacts

protection relay between the collector of the regulating transistor and the generator excitation winding makes the protection relay universal, protecting the regulating transistor from any short circuits of the excitation winding

both the mass and the positive output of the generator, which, in turn, increases the reliability of the voltage regulator as a whole.

Claims (3)

1. USSR author's certificate No. 443451, cl. H 02 R 9/18, 1972. 2. Authors certificate of the USSR No. 474895, cl. H G2P 9/30, 1973. 3. USSR author's certificate №276220, cl. H 02 R 9/30, 1968.