SU1317420A1 - Power source with transformeless input - Google Patents

Abstract

The invention relates to electrical engineering and can be used in static converters for secondary power sources. The goal is to increase reliability and efficiency. When the regulator 6 is locked, the capacitor 10 is charged through the diode 11, the choke 8 and the load 13, accumulating the energy of the inductive selection and thereby limiting its value. When unlocking the regulator 6, the capacitor 10 is discharged through it, the choke 8, the diode 12 and the load 13, t, e, the energy of the inductive surge is transferred to the load, thereby increasing reliability and efficiency, 2 sludge. S (L / 3 oe sl 4 yu

Description

The invention relates to electrical engineering and can be used in static conversion of secondary power supply sources.

The aim of the invention is to increase reliability and efficiency.

Fig. 1 shows a functional power supply diagram with a transformerless input; 2 a, b are voltage diagrams at a collector-emitter junction of a transistor regulator.

The power supply with transformerless input (Fig. 1) contains a series-connected rectifier 1, an input filter 20, a converter 3, a transformer 4 connected in series with respect to a common bus, a rectifier 5, a transistor regulator 6, a filter 7 containing a choke 8, and also , control unit 9, the outputs of which are separately connected to the control input of the transistor regulator 6 and the control input of the converter 3, circuit: capacitor 10 and two diodes 11 and 12 connected by the first anode, and the second by the cathode with you Odom capacitor 10, the other terminal of which is connected to the input of the regulator transistor, the cathode of the first diode connected to the output transistor of the regulator 6 and the second anode - the free output bus and the load 13.

The device works as follows.

The alternating voltage of the input network is fed to the rectifier 1, after which it is smoothed by the input filter 2 and fed to the input of the converter 3, which forms voltage pulses on the windings of the transformer 4.

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Power supply with transformerless input containing serially connected mains, input filter, converter, transformer connected in series with respect to the common bus, attenuator, transistor regulator, filter and control unit, whose outputs are separately monitorable and duty cycle - 45 are connected to the control input. The signal is transformed by the control signal supplied to the control input of the converter 3 from the control unit 9.

The control unit 9, made similar to the control unit in the prototype, generates the control signals of the transistor regulator 6, which are shifted in time relative to the turning on and off of the transistors of the converter in the same way as in the prototype

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When the transistor regulator 6 is locked, the current of the transformer 4 winding is abruptly interrupted, as a result of which the voltage rises sharply on the winding. At this time, the capacitor 10 is charged through diode 11, choke 8 and load 13, accumulating in itself an induced voltage surge and limiting the way its value (fig. 26) is about

When the transistor regulator 6 is unlocked, the capacitor 10 is discharged through it, the choke 8 and the load 13, transferring the stored energy to the load.

Thus, the energy of an inductive surge that occurs on the transformer winding at the time of interruption of the current is not dissipated as heat, but accumulates in the capacitor 10 and then enters the load, which increases the efficiency of the power source and the reliability of its operation.

In addition, the capacitance value of the capacitor 10 can be chosen such that the voltage across it does not reach with the necessary margin the allowable voltage for the transistor, which also exceeds the reliability of the transistor controller and the entire device in operation.

Claims (1)

Invention Formula A power supply with a transformerless input containing serially connected mains, an input filter, a converter, a transformer connected in series with respect to a common bus, a sniffer, a transistor regulator, a filter and a control unit, the outputs of which are separately connected A paddle and a transistor controller, characterized in that, in order to increase reliability and efficiency, a capacitor is inserted into it, one terminal connected to the input of the transistor controller, and two diodes connected by the first anode, and the second cathode to another terminal of the capacitor , the cathode of the first diode is connected to the output of the transistor regulator, and the anode of the second diode is connected to the common bus. U6 s Compiled by O. Ovs Nnikov Editor A. Makovska Tehred A. Kravchuk Subscription Order 2423/43 Edition 863 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5  111 Mil, I.and., .., 1, d ,. p-1t g-imzh- 1 Production and printing company, Uzhgorod, st. Project, 4 2 Proofreader M. Peugeot Subscription