SU68236A1 - Voltage Regulator - Google Patents

Description

A voltage regulator is known in which the measuring organ, via two electronic relays, is controlled by a reversible actuator, for example, a potential-regulator servo motor.

In the proposed controller design, a system of four transformers is used as a measuring organ. Two of them, which are powered from a controlled network, are made with differently saturated cores and have counter-connected secondary windings. The other two are connected by the primary windings in parallel, via differently directed rectifiers, to the difference of the secondary voltages of the first transformers and by the secondary windings to the grids of electronic relays, the anode values of which are powered by the additional secondary windings of the TP1 transformer. Such a regulator can be used, in particular, to stabilize the voltage, as well as to regulate various processes.

FIG. 1 shows an electrical voltage regulator circuit; in fig. 2 - a detailed diagram.

The voltage at the load terminals I is stabilized by an automatically acting NR potential-regulator using a circuit that responds to deviations from the required magnitude of the mains voltage. The action of the circuit is manifested in the fact that when the mains voltage changes in one direction, relay P / operates, and in case of a change in the other direction, relay P2 operates. The relays P1 and P2 control the actuator — a reversible servo motor D, which drives the potential regulator.

The operation of the circuit is as follows.

Transformer 7P / is made of highly saturated magnetic iron. Its power is small - in the order of a few watts. TP2 transformer with normal magnetic iron saturation. Its altitude is also small, like the transformer TP1, is about a few watts and is determined by the power of the electron tubes L1 and L2.

No. 68236

The transformer TPl with saturated iron has a characteristic (Ui) of the secondary voltage — the form of curve 1 (Fig. 2), and the transformer TP2 has a linear characteristic //. Here, Ui is the primary voltage of the transformers. The intersection point of the characteristics of both transformers corresponds to the equality of their secondary voltages. The voltage U of the network, at which the intersection of the characteristics / and // is reached, corresponds to the voltage with which we wish to be at the terminals of the consumer I. If the magnitude of the network voltage deviates from the required value H / (. Q secondary voltages of transformers TP1 and TP2 are made unequal, because when the secondary windings (Fig. 1) turn on the transformers in the secondary circuit, differential voltage is generated. If the mains voltage is U., then the counter voltages of the transformers TPJ and TP2 are the same; burn Their common secondary circuit is missing. The lamps L1 and L2 of two electronic relays are locked and the relays P1 and P2 are de-energized and the servomotor D used for turning the rotor of the regulator PR is disconnected from the mains. If the network voltage f / (. than the value (Fig. 2), then the secondary voltage of the transformer TP2 will be higher than the voltage of the GRU. In this case, the relay P1 is triggered, because due to the appropriate switching on of the rectifiers В1 and В2 Е the primary circuits of the grid transformers ТРЗ to ТР4 control pulse on the lamp grid L1 appears in a conductive floor Heat-anodic alternating voltage, and lamp L2 grid - a nonconductive half, whereby light L2 will not conduct current. Actuation of relay P1 leads to such activation of servo motor D, that turning the rotor of the potential regulator leads to a decrease in BSD of the value at which the secondary voltages of transformers TP1 and TP2 match, and the lamp grids will not receive pulses, causing the relay P1 to switch off again and turn off the servomotor D. If the voltage f / becomes less than the magnitude, the secondary voltage of the transformer TP1 will be greater than that of TP2, the control pulses will be fed to the grids of the lamps: L1 - ъ non conductive half-period of the anode voltage and P2 - conductive. Lamp L2 will open, relay P2 will energize and turn on servo motor D in the opposite direction - to increase the value of t / c. Thus, lamps L1 and L2 operate non-simultaneously, depending on the voltage of the load terminals, which is greater or less than f / co. - the lamp power supply provides for a third winding at the transformer TP1 (clamps ab). The winding from which the anodic voltage is removed is located in the transformer TP1 to provide an approximate anodic voltage.

Subject invention

A voltage regulator, in which the measuring unit controls two reversible actuators via two electronic relays, for example, a servo-regulator servo motor, characterized in that a system of four transformers, of which two supplied from a monitored network, are used as a measuring organ differently saturated cores and have counter-connected secondary windings, while the other two are connected in parallel by the primary windings, through differently directed rectifiers to the difference of secondary voltages the first transformers, and the secondary windings - on the grid of electronic relays, the anode circuits of which are powered by the additional secondary winding of the first transformer.

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