SU756383A1 - Voltage stabilizer - Google Patents

Description

The invention relates to electrical engineering, in particular to the secondary power supplies and can be used to power _{{radioelektron-} hydrochloric apparatus.

Known DC voltage regulator £ 1], ^ 2 ^. The first comprises a control element adapted to a current inverter output current pere'mennogo through which ^trans-1

the formator, the rectifier and the smoothing 1C filter are connected to the output terminals. Its drawbacks include the steeply dipping character of the external characteristic of the current inverter, 1 significant size and weight of the device, since in this circuit the inverter, transformer and rectifier must be performed at full power. 2

The second and closest to this technical solution contains a single-phase rectifier connected, 'input to the input terminals, to the first 2, output ¹ output terminals through the control. the element to the first and the second output terminal to the second output terminals, and the control element is made on the inverter 3

2

current, the output terminals of the alternating current through a transformer and a current-limiting reactive circuit are connected to the input of the auxiliary rectifier, the first output terminal of which is connected to the second output terminal. The inverter in this circuit transmits only part of the power consumed by the load to the AC circuit. Through the rectifier, the power from the regulating element is returned to the DC circuit. This allows you to reduce the weight and volume of the regulating inverter,

5 mator and rectifier, to ensure high efficiency. The amount of power removed from the DC circuit through the inverter depends on the magnitude of the voltage fluctuations at the power supply terminals. The greater the magnitude of the ripple voltage at the terminals of the rectifier, the greater the magnitude of the power for which the inverter, transformer, reactors and rectifier must be calculated. Small fluctuations in the supply voltage are usually provided by installing a BS filter at the output of the rectifier. This solution to the problem of powering electronic equipment from odnaef636383

The 220 volt network is associated with the installation of energy-intensive U-filters having a significant mass.

The aim of the invention is to reduce the mass of the voltage regulator.

The goal is achieved by adding a storage capacitor and a diode to the voltage regulator, the storage capacitor being connected in parallel to the output, terminals of the auxiliary rectifier, and a diode between the second output terminal of the above-mentioned auxiliary rectifier and the first output terminal of the single-phase rectifier ”

The drawing shows the principal. .naya circuit of voltage regulator.

The single-phase rectifier 1 is connected to the load 2 via a regulating element that is made on the current inverter 3. The AC outputs of the inverter 3 are connected via a transformer 4, a reactive current-limiting circuit'5 with the AC outputs of the auxiliary rectifier 6. In parallel, the DC outputs of the auxiliary rectifier 6 are connected in parallel storage capacitor 7. To the output of the positive polarity of the auxiliary rectifier b is connected the anode of the diode 8, the cathode of which is connected to the positive output of a single-phase output rummer

1. The control system of the thyristors of the inverter 9 provides alternate turn on of the thyristors.

The voltage regulator works as follows.

For large voltages of the outputs of a single-phase rectifier 1, the regulating inverter 3 operates with a large input resistance, and for small values of the voltage at the outputs of the single-phase rectifier 1, the input resistance of the regulating inverter 3 is minimal. In the time intervals during which co- _; . the resistance of the inverter is large, the energy from the inverter through the transformer 4, the current-limiting reactive circuit 5 and the auxiliary rectifier 6 is diverted to a storage capacitor 7, At low values of voltage at the terminals of the single-phase rectifier 1, which is less than the voltage on the storage capacitor 7, the diodes of the single-phase rectifier 1 are closed, and the load is powered by the storage capacitor 7 through the diode 8 and the inverter 3, the resistance of which in this mode is small. To increase the stabilization factor, the frequency of the inverter varies depending on the voltage on the load of the control circuit 9.

Compensation of load resistance changes 2 in the stabilizer circuit is carried out by changing the oscillation range of the input resistance of the inverter 3, which is regulated by changing the thyristor switching frequency determined by the control system 9. When the output voltage decreases, the switching frequency of the inverter 3 thyristors increases, which reduces its resistance to direct current. Feedback provides compensation for disturbances and input voltage which are not fully compensated by the internal interconnections of the regulating inverter 3 of rectifiers 1 and 6 of the storage capacitor 7 and diode 8.

Claims (1)

Claim Voltage stabilizer containing a single-phase rectifier connected to the input terminals by the input, the first output terminal through the regulating element to the first, and the second output terminal to the second output terminals, and the regulating element is made on the current inverter, the output terminals of which are alternating current through the transformer and the current-limiting reactive the circuit is connected to the input of the auxiliary rectifier, the first output of which is connected to the second output terminal, characterized in that, in order to reduce the mass, in additionally introduced a storage capacitor and a diode, the storage capacitor is connected parallel to the output terminals of the auxiliary rectifier and diodmezhdu second output terminal of said auxiliary rectifier and the first output terminal of the single-phase rectifier.