SU862133A1 - Stabilizer two stage converter - Google Patents

Description

(54) STABILIZED DOUBLE-EXTENDED

one

The invention relates to converter equipment and can be used in secondary power sources of radioelectronic equipment (REA) or electronic computers (COMPUTERS),

A two-stage secondary stabilized power source for REA and a computer is known. The first stage of stabilization includes a motor-generator, and the second stage includes a static inverter made on thyristors or transistors and operating in the key regulator of the output voltage Cl3. Electromagnetic isolation of the power output terminals from the effects of all types of interference in the primary power supply circuit. This method of decoupling is quite effective and has wide application in powerful radio engineering systems and computer complexes of increased productivity. The main disadvantages of such a power source are: low reliability of operation due to the presence of rotating elements in electric machine units; significant noise when the motor-generator; CONVERTER

the difficulties associated with conducting routine inspection and maintenance of rotating parts of the motor-generator.

The closest technical solution to the invention is the stabilized two-stage converter Gz, which in its first stage contains a key controller consisting of

10 transistor switch, pulse-width modulator and LCD demodulator, and in the second stage, push-pull. adjustable transistor converter, control unit and master geyator. This device uses a pulse-width voltage control method in each stabilization stage.

However, in it the level of attenuation

The 20 interferences in the converters are limited by the magnitude of the attenuation coefficient of the filters, installed in the circuit of each voltage conversion stage. In this case, in a number of cases

Claims (2)

25 filters installed in converters for smoothing pulsations F are not sufficiently effective and therefore additional special filters are installed at the input of the converter. The aim of the invention is to increase the noise immunity of the converter output from input noise. This goal is achieved by the fact that a stabilized two-stage converter containing, in the first stage, a key voltage regulator, consisting of a transistor switch, a pulse-width modulator and an LCD demodulator, and in the second stage a two-stroke regulator1 "L a transistor converter, a control unit and a generator of shares; a frequency divider is introduced, one output of which is connected to the input of a pulse-width modulator, the other to the input of the control unit, and the input to the output of the master oscillator. FIG. 1 shows the electrical structural diagram of the device; in fig. 2 - diagrams of voltages and currents, which show his work. The stabilized two-stage converter consists of a key stabilizer 1, which is the first step in stabilizing the output voltage. "The second stage of stabilization is a push-pull adjustable transistor converter 2. The switching frequency of the components of the converter components is controlled by a master oscillator 3 and a frequency divider 4, made, for example, on the basis of a three-ger with a counting start. The key stabilizer 1 consists of a transistor 5, an LCD demodulator, made on diode b, a choke 7 and a capacitor 8, a pulse width modulator modulator 9. A two-stroke adjustable transducer 2 consists of transistors 10, 11, a transformer 12, rectifying diodes 13, 14, the capacitor 15, the control unit 16 and the total load 1 of the converter. Two-stage converter Permanent: whom voltage works as follows. The master oscillator 3 generates pulses (Fig. 2 a), which are fed to the input of frequency divider 4, made according to the trigger scheme with a counting start. The output pulses of the trigger (Fig. 2b, c), having a frequency twice lower than the fundamental frequency of the oscillator and shifted in phase by half the period of the output frequency, arrive at the corresponding inputs of the pulse-width modulator 9 and the control unit 16. Pulse-width modulus The torus 9 generates rectangular pulses of control of the transistor 5 during the duration of the output pulse (Fig. 2d) of the trigger 4, while the duration of the pulse is related to the value of the output voltage and depends on the ratio between the input and output voltage m key stabilizer 1 load current. The control unit 16 in a similar way generates rectangular control pulses of the rangers 10, 11 for the duration of the output pulse (Fig. 2 d) of the other arm of the trigger 4, while the pulse duration depends on the ratio between the output voltage of the converter and the output voltage of the key stabilizer 1 and current naguzki. The introduction of frequency divider 4 in the form of a trigger with a counting start makes it possible to divide the transistor operation in time 5, 10 and 11 of each stage of the converter, which eliminates the possibility of interference occurring at its input due to the absence of electromagnetic coupling between the input and the output. To eliminate the electromagnetic coupling of the input of the converter with its output along the control circuits of the transistors 5, 10, 11, optocoupler control circuits can be used. The use of a more complex frequency splitter instead of a trigger allows the functionality of the converter s to be partly modified by changing the temporal relationships of either of the transistor switches or eliminating the simultaneous switching of the two stages. The use of a stabilized two-stage converter in electronic equipment and computers under the conditions of intense intrinsic and external electrical interference also makes it possible in a number of cases to improve the weight and size characteristics of secondary power supplies due to the absence of special interference suppression filters in them. Claims of Invention A stabilized two-stage converter containing, in the first stage, a key voltage regulator, consisting of a transistor switch, a pulse-width modulator, and an LC0-demodulator, as well. in the second stage, a two-stroke adjustable transistor converter, a control unit and a master oscillator, which is designed to increase the noise immunity of the converter, a frequency divider is inserted in it, one output of which is connected to the input of a pulse-width modulator and another - with the input of the control unit, and the input with the output of the master oscillator. Sources of information taken into account during the examination 1. N. Kolesnikov,. Ikonnikov A, H. The use of electrical units as a reserve of industrial power lines. Sat Electrical engineering, sir. T govoy and lifting electric equipment, vol. 3/27, 1974. 2. Electronics 20, 1975, 5 (prototype)