SU1603354A1 - A.c.voltage control - Google Patents

Abstract

The invention relates to secondary power sources of radio equipment. The aim of the invention is to reduce the control error. The goal is achieved by introducing into the circuit three additional switches 15, 16 and 17 of alternating current and two additional adjusting windings 18 and 19. Changing the magnitude of the output voltage is performed in all modes of operation by turning on the required keys at certain points in time. 1 il.

Description

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31603354

The invention relates to electrical engineering, in particular, to converter equipment, and can be used in the construction of discrete regulators and variable voltage regulators for powering electronic and radio devices for various purposes.

The purpose of the invention is to reduce the control error.

The drawing shows a regulator circuit.

The device contains a transformer 1, the input terminals 2 and 3, the main winding A, the adjusting winding 5, divided into sections 6,7- and 8 by taps, where one is extreme; the output of the main winding 4 is connected to the first output terminal of the regulator 9, and the extreme leads and each tap of the adjusting winding 5 through the keys 10-13 AC of the main group of keys are connected to the second output terminal of the regulator 14, the first 15, the second 16 and the third 17 to - completeness; AC keys, first 18 and second 19 additional adjusting windings, where the key 15 is connected - between the second output terminal 14 and the second extreme terminal of the main winding 4, which through the second additional key 16 and connected to it in series with the first additional adjustment winding 18 is connected to one extreme terminal of the adjusting winding 5, and through a third additional key 17 and connected in series with it a second additional adjusting winding 19 is connected to the other extreme pin of the regulator winding 5.

At the same time, the number of turns in sections 6,7,8 of the adjusting winding 5 and in the additional adjusting windings 18,19 is chosen equal to the EMF of a single step of adjustment,

Reh ul alternating voltage works as follows.

The alternating voltage U is supplied to the input terminals 2.3 and respectively on the main winding 4, the adjusting winding 5 with sections 6.7 and 8 and the additional adjusting windings 18, 19 of the transformer 1 are applied to the voltage of the required values. The voltage change at the output of the regulators 9,14 is made by connecting the sections 6,7,8 and additional 30

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telny adjusting windings 18,19 counter or according to the main winding 4 using keys 10-13 and 15-17 AC. The value of the output variable voltage U is determined by the expression:

 (--Y-- i).

where V d is the unregulated voltage of the main winding 4; S is the number of discrete levels of output voltage realized; i is the sequence number of the level, with

i 1,2,3 ... s.

The first level of the output voltage corresponds to its minimum value and is realized by turning on the alternating current keys 13 and 16, with sections 6-8 and the additional control winding 18 being turned on opposite to the unregulated main winding 4, i.e. Uj, and about - 4E

The second level of the output voltage and 22. is realized when the keys 12 and 16 are turned on, section 6.7 and the additional control winding 18 being turned on. They are opposed to the unregulated main winding 4, i.e.

 and, - ze.

Subsequent output voltage levels are implemented as follows: U2g UQ - 2E (AND keys are included

and 16);

 E (keys 10 and 16 included); and,. Uo (key 15 is on); . E (keys 13 and 17 are included); G7 about 2E (keys 12 and 1 7 are included); З З (keys 11 and 1 7 are included).

The maximum output voltage level is realized by switching on the keys 10 and 17, with sections 6-8 and the additional control winding 19 being turned on according to the main winding 4.

When successively changing the output voltage levels from minimum to maximum or from maximum to minimum, i.e. with a consecutive change in the controller transformation ratios, the total emf of switched windings 6.7, 8, 18, 19 does not exceed the control level E. This allows, as in the prototype circuit, to regulate the output voltage during natural switching of AC keys, which greatly simplifies the device and increases its reliability.

The total number of realized output voltage levels of the proposed controller is S 2N-5, which, as compared to the prototype circuit, allows reducing the error of output voltage regulation. So, with the number of AC switches N 7 used, the proposed AC voltage regulator has a 1.33 times less control error. As the number of AC switches N used increases, the advantages of the controller are expressed more clearly.

Claims (1)

Invention Formula An AC voltage regulator containing a transformer, the primary winding of which is connected to the input terminals, and the secondary is designed as a main and control winding. ki, divided into sections using taps, the first end of the main winding is connected to the first output terminal, the extreme terminals and each tap of the adjusting winding are connected to the second output terminal via corresponding AC switches, characterized in that, in order to reduce the adjustment error, it is equipped three additional keys of alternating current and two additional adjusting windings, and the first dog is equipped with an alternating current switch that is closed between the second output terminal and the second ohm of the main winding, which through the second additional key of alternating current and connected in series with it the first additional adjusting winding is connected to one extreme terminal of the adjusting winding, and through the third additional key of alternating current 5 and in series with it the connected second additional adjustment winding is connected to the other extreme terminal of the adjustment winding. 0