SU1746489A1 - Multichannel power supply - Google Patents

Abstract

Usage: power supply of electronic equipment. The purpose of the invention is to obtain highly stable output voltages and low ripple output voltages with minimum weight and dimensions. The multichannel power supply contains a controlled constant voltage converter 1 to constant voltage and n output channels. The output transformer 3 of the converter has one secondary winding connected to the output channel covered by the feedback, and the voltages in the other output channels appear due to the use of a multiwinding magnetically coupled throttle 5, each of which windings is a choke of a smoothing filter in each from the output channels. 1 il. yr

Description

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The invention relates to electrical engineering and can be used to power electronic equipment.

A power source with voltage output pins from an input filter choke is known, comprising an interrupter, a multiple choke choke, a no-load diode and a capacitor.

The disadvantages of the source are limiting the use of this device at high power loads, the impossibility of obtaining stable output voltages without the use of additional devices.

A converter is also known, which contains an inverter with n outputs and n rectifiers and filter capacitors with a load, auxiliary rectifiers and thyristor control devices.

A disadvantage of the known converter is that many additional devices are used for centralized stabilization of the output voltages, which degrade the weight and size parameters and reliability, but do not affect the level of the pulsations.

The closest in technical parameters to the claimed one is a multichannel power source containing a controlled constant-voltage converter to constant voltage with n outputs and filter capacitors and a filter choke.

The power source improves the stability of the output voltages when the load current varies, while at the same time simplifying the use of a filter throttle, which is common to all output channels.

The disadvantages of the known power source are as follows. In some cases, it is necessary for the user to galvanically separate the supply voltages, in which case the application of a known source is not possible. The filter choke has significant dimensions and mass, since the total current of all channels flows through it. To achieve a low ripple level of output voltages, it is necessary to have a significant capacity of filter capacitors or to increase the inductance of the filter throttle, which leads to an increase in its size and mass.

The purpose of the invention is to obtain highly stable output voltages and low ripple output voltages with minimum weight and dimensions.

This goal is achieved by the fact that the output transformer of the converter

It has only one secondary winding connected to the output channel covered by feedback, and voltages in other output channels appear due to the use of a multiwinding magnetically connected throttle, each of which windings is a choke of a smoothing filter in each of the output windings. channels.

The drawing shows the execution scheme

0 multichannel power source.

The multichannel power source contains a converter 1, which converts the voltage of the primary network into a single secondary voltage, which includes a controlled constant voltage converter 2 to a constant voltage, operating on the output transformer 3, the secondary winding of which is connected to the output rectifier 4, and a multiwinding magnetically coupled choke 5, rectifying diodes 6, closing currents of chokes of channels not covered by feedback, filter capacitors 7.

The power source works as follows.

5 way.

A constant supply voltage is supplied to the converter 2, at the output terminals of which a pulsating voltage of high frequency is created. The output transformer 3 creates, from this pulsating voltage on its secondary winding, a voltage of the required level, which is rectified by the output rectifier 4 and fed into

5 output channel Uihl, covered by feedback. Through the windings of a multi-winding magneto-coupled droplets 5, the voltages are created in the output channels from iyv2 to 1) out. smoothed by filters

0 consisting of windings of multiwinding chokes 5 and capacitors 7, and then supplied to consumers.

The high stability of the output voltages is achieved by the fact that the entire weekend

5, the channels are magnetically coupled to each other due to the use of multiwinding chokes, and a change in current in any of the output channels leads to a change in voltage drop, and on the winding-filter choke of the output channel covered by feedback, the duty ratio of the control signal, and the voltage across the output channels does not change

5Low weekend ripple

stresses are achieved in the following way. Since all windings of multiwinding chokes are magnetically connected, the inductance of the filter chokes of each channel is determined not only by the number of turns in the winding and the magnetic conductor, but also by the inductance introduced from other channels. Thus, the required inductance is achieved by a significantly smaller number of turns in the windings.

Experimental studies of the proposed multichannel power source showed that, compared with the analogous multichannel power source in the claimed source, the mass and dimensions of the filtering multiwinding throttle are significantly less. The consumption of copper (copper wire) is reduced accordingly. In addition, the economic effect is obtained by simplifying the circuit design and reducing the number of radio elements,

Claims (1)

Invention Formula 0 A multi-channel power source containing a controlled DC / DC converter, a multiple-wound choke, N filter capacitors, N rectifying diodes, characterized in that, in order to reduce the weight and size, the transformer is made with one secondary winding, k which connects each winding of multiwinding chokes, through the corresponding N-filter rectifiers and M-filter capacitors, which form N output channels,