RU2091973C1 - Secondary source of current - Google Patents

Abstract

FIELD: conversion technology. SUBSTANCE: auxiliary secondary winding which realizes principle of superposition of electromotive force and currents generated by primary and secondary windings is introduced into multi-winding power transformer. Secondary winding consists of two parts. One of them receives voltage pulse and the other is a compensating one. Conditions for parallel resonance with minimum current in secondary winding are provided in the latter. EFFECT: high efficiency of device. 1 dwg

Description

 The invention relates to a conversion technique, namely to secondary AC sources.

 The purpose of the invention is the improvement of secondary power supplies containing, as a conversion element, a single-phase multi-winding transformer.

 Closest to the invention is a transformer used in secondary power supply systems for converting a voltage level (ed. St. N 1277315, bull. N 46 dated 12/15/86), containing two additional windings, each of which is connected in parallel with the primary and primary secondary windings with a slit to improve the transmission of the output signal by compensating for the leakage inductance of the windings. Moreover, if the transformation coefficient is large, then the compensation is carried out on one winding, which contains the largest number of turns.

 A distinctive feature of this source from others, in which a transformer is used to convert the voltage level, and from the closest analogue, is that another additional secondary winding is introduced, in which the principle of superposition of E.D.S. and currents induced by the primary winding and the secondary winding; consisting of a voltage receiving pulse and compensating windings connected in parallel to each other and a capacitor capacitance in which parallel resonance is implemented at the frequency of the primary current source.

 The purpose of the invention is the improvement of secondary power supplies containing a single-phase multi-winding transformer as a conversion element, increasing KPD similar devices.

 The drawing shows a diagram of a secondary current source containing a multi-winding power transformer as a converter element. The secondary power source contains a single-phase multi-winding power transformer 1, in which the primary winding 1, to which the power source is connected; secondary winding 2, receiving a voltage pulse; winding 3 compensating, parallel to winding 2; additional secondary winding 4 for load connection; capacitor 2, zener diodes 3, 4, acting as voltage amplitude limiters and designed for stabilization voltage equal to the rated voltage of the primary power supply +2.3 V, zener diodes 5.6, designed for stabilization voltage equal to the output voltage, line inductor 7, balanced resistances 8 ,nine.

 The secondary power source operates as follows.

где n₁, n₂ число витков в первичной и вторичной обмотках 1 и 2.At the input of the source is an alternating voltage AND ₁ , the current strength J ₁ . Input power P ₁ U ₁ • J ₁ . Transformer converts input voltage and current with transformation ratio

where n ₁ , n _{2 the} number of turns in the primary and secondary windings 1 and 2.

ЭДС вторичных обмоток, приведенных к числу витков первичной обмотки, и

где

токи вторичных обмоток, приведенные к числу витков первичной обмотки; n₁, n₃, n₄ число витков в обмотках 1, 3, 4.In a single-phase multi-winding transformer, the following equality holds:

EMF of the secondary windings, reduced to the number of turns of the primary winding, and

Where

secondary winding currents reduced to the number of turns of the primary winding; n ₁ , n ₃ , n _{4 the} number of turns in the windings 1, 3, 4.

Линейный дроссель 7, подключенный последовательно с обмоткой 3 обеспечивает выполнение в обмотке 2 условия

(авт. св. N 1277315), т.е.

0. Кроме того, конденсатор, подключенный параллельно индуктивностям (дросселю 7 с обмоткой 3, в обмотке 2) подбирается таким образом, чтобы выполнялось условие параллельного резонанса с минимумом тока

, т.е.Thus:

Line inductor 7 connected in series with winding 3 ensures that the conditions in winding 2 are met

(ed. St. N 1277315), i.e.

0. In addition, a capacitor connected in parallel with inductances (inductor 7 with winding 3, in winding 2) is selected so that the condition of parallel resonance with a minimum of current

, i.e.

Параметры элементов контура, образованного параллельным соединением последовательно включенных индуктивностей компенсирующей обмотки 3 трансформатора и линейного дросселя 7; емкости конденсатора и индуктивности, принимающей импульс напряжения обмотки 2 трансформатора выбраны из условия обеспечения резонанса на частоте напряжения первичного источника питания.

The parameters of the circuit elements formed by the parallel connection of series-connected inductances of the compensating winding 3 of the transformer and the linear inductor 7; the capacitance of the capacitor and the inductance receiving the voltage pulse of the winding 2 of the transformer are selected from the condition of ensuring resonance at the voltage frequency of the primary power source.

При подключении обмоток согласно фиг. 1 появляются дополнительные приращения ЭДС в обмотках 1, 4

При этом так как для упрощения рассмотрения принято, что n₁=n₃=n₄, то:

Величина

ограничена параметрами стабилитронов 5,6.In the case of the usual connection of the power source (without the participation of windings 2, 3), the electrical state of the windings 1, 4 is described by the equations:

When connecting the windings according to FIG. 1 additional increments of EMF appear in windings 1, 4

Moreover, since for simplification of the consideration it is accepted that n ₁ = n ₃ = n ₄ , then:

Value

limited by the parameters of zener diodes 5.6.

т. е. осуществляется принцип суперпозиции ЭДС. и токов, наводимых первичной 1 и вторичной 2 и 3 обмотками.Summing EMF. induced when connecting voltage And ₁ and additionally arising from this connection scheme we have:

i.e., the principle of superposition of EMF is implemented. and currents induced by primary 1 and secondary 2 and 3 windings.

From the last two equations it can be seen that due to the circuit formed from the parallel connection of the windings 2, the capacitor 2, and the winding with the inductor 7, additional voltage increments appear in the windings 1 and 4, and if in the winding 1 the voltage increment is aimed at decreasing the primary voltage , then in winding 4, the voltage increment will increase the load voltage by the same amount, provided that n ₁ = n ₄ .

но т. к.

, то можно записать, что мощность, отдаваемая источником питания на первичной обмотке 1, будет равна: P₁= (U₁- ΔU₁)•I₁ а мощность, отдаваемая на нагрузку обмоткой 4: P₄= (U₄+ ΔU₄)•I₄.The current ratio of the transformer operating in load mode as noted earlier:

but since

, then we can write that the power given by the power source on the primary winding 1 will be equal to: P ₁ = (U ₁ - ΔU ₁ ) • I ₁ and the power given to the load by the winding 4: P ₄ = (U ₄ + ΔU ₄ ) • I ₄ .

Claims (1)

A secondary current source containing a single-phase multi-winding power transformer, the primary winding of which is connected to a power source, the secondary winding consists of two parts and contains a winding receiving a voltage pulse in parallel with each other and a compensating winding, in series with which a linear inductor is connected, characterized in that that an additional secondary winding with terminals for connecting the load is introduced, a capacitor is connected in parallel with the parts of the secondary winding, creating conditions for parallel resonance with a minimum of current in the secondary circuit at the frequency of the voltage of the power source, while the ratios between the number of turns of the transformer windings are as follows:
n ₁ n ₃ n ₄ ,
where n _{1 is the} number of turns of the primary winding;
n _{3 the} number of turns of the compensating winding;
n _{4 the} number of turns of the secondary secondary winding.