SU498705A1 - Voltage Regulator for Valve Generators - Google Patents

Description

one

The invention relates to devices for controlling valve and synchronous generators operating in parallel with batteries installed in automobiles, tractors, airplanes and other objects.

In the known voltage regulators for valve generators containing a transistor relay with emitter feedback, the diode system protects the batteries from the discharge on the excitation winding, the voltage divider in the battery circuit varies with the rotation frequency of the generator core and the load the voltage varies significantly. Therefore, the known regulators do not provide high precision of regulation.

In the proposed voltage regulator, these disadvantages are eliminated due to the fact that the input of the transistor relay is connected to a voltage divider, one arm of which is connected in series to the diode circuit that shunt the excitation winding of the generator.

The drawing shows a circuit diagram of a voltage regulator, where 1 is a vent generator with excitation winding 2 operating in parallel with batteries 3.

The regulator consists of a transistor relay with emitter feedback made on

resistor 4. The relay contains a composite transistor 5 and 6, in the collector circuit of which the excitation winding of the generator 2 is connected, shunted by a chain; diode 7 - resistance 8. To protect the batteries 3 from being discharged to the excitation winding 2 when the generator is not working, the signal to the input of the composite transistor 5, 6 is supplied from the generator through an additional rectifier

shoulder 9 and resistance 10.

The control signal of the transistor 11, which is the second active element of the relay, is supplied from a divider consisting of three resistances 8, 12 and 13 through the zener diode 14.

The divider contains a resistance of 8, through which the current flows from the emf. self-induction of the excitation winding.

From the theory of discrete regulators, it follows that in order to ensure the constant voltage of the valve generator with increasing rotational frequency of the core, the return coefficient of a semiconductor relay should decrease.

The voltage regulator operates as follows. When running generator emf. from the residual magnetic flux is applied to the input of the composite transistor 5, 6, the latter opens, which provides excitation

generator.

When the generator voltage reaches the tripping voltage of the transistor relay UCP, the transistor 11 switches to the saturation state, and the composite transistor 5, 6 to the cut-off state. The excitation winding of the generator 1 is de-energized, emf. self-induction is closed along the chain: diode 7-resistance 8. As a result, the potential at the base electrode of the transistor 11 increases. If you mind, the voltage of the generator 1 to the release voltage f / the output voltage of the transistor I switches to the cut-off state and the composite transistor to the saturation state. Then the cycle of operation is repeated. Since the excitation current flows through the resistances 4 and 8, as the rotor speed of the generator increases (the excitation current decreases), the response voltage of the f / cp semiconductor relay decreases and the release voltage of the UOTU relay increases. As a result, with an increase in the frequency of rotation of the rotor of the generator, the return coefficient of the semiconductor relay decreases. By appropriate selection of resistances 4 and 8, regulation statism can be minimized.

Claims (1)

Invention Formula A voltage regulator for valve generators containing a transistor relay with emitter feedback, a diode system protecting the batteries from the discharge on the field winding, a voltage divider in the battery circuit, in order to increase the control accuracy, the input of the transistor relay is connected to a voltage divider, one arm of which is connected in series to the diode circuit that shunt the field winding of the generator.