UA151493U - A method of powering a high-voltage led using a resonant converter of two inductively coupled circuits - Google Patents

Abstract

A method of powering a high-voltage LED using a resonant converter of two inductively coupled circuits, the method being realized by means of two inductively coupled parallel and series circuits, the first of which is connected to a low-voltage power supply, and the latter increases the voltage on the LED due to resonant phenomena.

Description

The useful model belongs to the field of electrical engineering and radio engineering and can be used in all fields where an important characteristic is an increase in output voltage and a significant reduction in current energy losses.

The effectiveness of the proposed method is based on the principle of operation of resonant voltage converters in electrical devices designed to generate large alternating currents and voltages. Structurally, converters resemble both air and core transformers, but they are united by a common feature: operation in resonance mode.

In principle, such devices consist of two or more inductively coupled resonant circuits with a distinctive feature. The secondary winding is open. Here there is a distributed capacity, the size of which is provided by the geometry of the external environment. Hence, the creation of resonant conditions is rather problematic, and the output current is vanishingly small.

There are known methods and devices for resonant conversion of an alternating sinusoidal voltage.

The known method "Resonant power amplifier" (patent Mo 103215 OA, NOZN 7/00, publ. 10.12.20151. The essence of this method is the excitation of amplified current and voltage oscillations due to the use of two resonant circuits. Both resonant circuits are included in series in the electric circuit source of excitation and have a magnetic connection of mutual induction.The first resonance frequency is chosen to be lower than the frequency of the signal of the excitation source, and the second resonance frequency is chosen to be greater than the frequency of the signal of the excitation source.

The disadvantage of this method of achieving enhanced current and power amplitudes is the significant complexity of setting the resonant frequencies of the first and second circuit due to nonlinear processes due to the use of a ferromagnetic core.

The known method "Resonant transformer" (patent VO Mo 2418333С1, publ. 10.05.20111.

The invention belongs to electrical engineering and is intended, in particular, to convert one alternating current system into another. The technical result consists in reducing the influence of the secondary winding on the primary. A resonant transformer contains a magnet wire, a primary winding, a secondary winding and a capacitor. The magnetic wire has elongated rods and a yoke. The secondary winding is symmetrically spaced, and together with the primary winding is located around one rod. Primary

The transformer circuit is introduced into the current resonance mode by parallel connection of the capacitor and the primary winding.

The disadvantage of this method is high energy losses due to the fact that the transformer with a core, although it is of sufficient quality from the point of view of energy transmission, is characterized by losses associated with the dissipation of the magnetic field.

The closest in essence to the proposed one is "Method of resonant amplification of electric power using two active-reactive sequential circuits with a common capacitive energy storage" (Mo 148827, OA NOZN 7/00, publ. 09/22/20211.

The use of this method leads to the conversion of increased reactive power in the first resonant circuit into active power, which is removed from the load of the second circuit, due to the use of an additional converter circuit consisting of two inductively connected parallel and series circuits, the first of which is connected to the source reactive power, and the latter contains a load for removing active power.

The disadvantage of this method is the lack of useful work. The heating of active resistance has no significant practical application.

The useful model is based on the task of increasing the low input voltage to a much higher output voltage for powering the LED using a converter from two inductively coupled circuits.

The problem is solved by the fact that the low-voltage to high-voltage converter consists of two circuits connected inductively through a matching transformer. In the first circuit, the reactive power increases due to the resonance of the currents on the elements that make up this circuit, and in the second circuit there is a voltage resonance, due to which there is a significant increase in the active power on the load of the circuit.

The drawing shows the implementation scheme of the proposed method, where the following are marked: 1, 2 - resonance contours; Shchoi, Shchog, 911, 912, d2 - currents in the circuits; Oo - voltage on a low-voltage power source; Si, Sg - capacities; Ii, I 2" - inductances of the matching transformer; B: - active resistance of the first circuit, H2 - active load of the second circuit, MO; - LED.

The proposed method is implemented as follows. The parameters of the first circuit, namely, the capacitance C, the inductance I, and the frequency of the input signal are selected in such a way that resonant phenomena occur in the second circuit, due to which the reactive power increases due to the resonance of the currents on the above-mentioned elements that make up this circuit.

The first and second circuits are interconnected by the inductance of the matching transformer, which consists of two flat windings I: and I 2 with an adjustable coupling coefficient between them. The parameters of the second circuit, namely 12 and Сg, must correspond to the resonance conditions of the first circuit. Due to this, the phenomenon of voltage resonance occurs in the second circuit, due to which there is a significant increase in the voltage on the MO LED.

The use of this method leads to the conversion of increased reactive power in the first resonant circuit into active power, which is removed from the LED in the second circuit, due to the use of an additional converter circuit consisting of two inductively connected parallel and series circuits, the first of which is connected to AC power supply, and the latter contains a load in the form of an LED with a supply voltage higher than the input.

Claims (1)

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