SU1603501A1 - Multiple-cell d.c. voltage converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power supply systems. The purpose of the invention is to increase reliability by equalizing the dynamic losses in the same-name transistors of all inverter cells. The converter contains N inverter cells 3.1 ... 3N, connected in parallel to the input, and serially to the output. Each cell is made on the first 5 and second 6 transistors combined by emitters. The capacitors 7 and 8 connect in pairs the collectors of the first 5 and second 6 transistors, respectively. When the first 5 or second 6 transistors are turned on and off, the charge or discharge currents of the capacitors, respectively, 7 or 8, load the lagging transistors in the switching process, and vice versa, in the switching process, the lagging transistors load. Due to this, the on and off times and the dynamic losses in the transistors 5.1 ... 5.N and 6.1 ... 6.N are aligned. 1 il.

Description

The invention relates to electrical power and can be used in secondary power supply systems.

I The purpose of the invention is to poke the ground by leveling the dynamic losses in the same-name transistors of all inverter cells.

The drawing shows a diagram of the Converter.

Many cell converters contain a master oscillator 1, a common impedance 2, n inverter cells 341 ... Z.p, each of which consists of Ht from transformer 4, first transistor 5 and second transistor 6. K: gioMe is also a converter. contains - p capacitors 7. (1-2) ... 7 - (p- -p-nj and p capacitors 8. (1-2) ... 8, (1 (1-1) -p. Secondary windings all transformers 4.1 ... 4.p are included P (| eeditally among themselves and connected to the output rectifier 2, and the primary and $ 1e windings are connected in each of the converter cells 3.1. .3. with the collections of the first and second trans of sources 5.1о..5.п and 6.1 .. .6.п, emitters of which are connected to one input terminal of the converter, the other input terminal of which is connected to a tap of the midpoint of the primary windings of transformers 4.1 ... 4.p. Base, first one and The second transistors, 3.1 ... 5.p and 6.1.1 bp are connected respectively to the first E (the SM and the second outputs of the master generator; generator 1, and the collectors of the like transistors of the same name are connected in pairs through the corresponding capacitors are 1, (1-2) ... 7 С (п--1) -п and 8. (1-2) ... 8 (п-1) -п.

The cell converter works in the following way.

The master oscillator 1 detects the control signals, under the influence of -. the batteries of which alternately open transistors 5 and 6 in all inverter cells 3. The load of transistor 5, 6 is transformer 4. In the secondary winding of transformer 4,

each of their cells 3 is induced by alternating voltage. The secondary windings of transformers 4 are connected in series, therefore, the voltage supplied to exporter 2 is equal to the sum of the voltages of the secondary trans- windings: formators 4 of all cells 3.

The transistors 5.1, 5.2 ... 5.p control signal comes simultaneously. From -d scatter time pairs

0

five

0

five

meters of transistors, one of the transistors, for example 5.2, is switched on more than others. Through the capacitors 7.1-2, 7.2-3 ... 7. f (n-1) -current from other cells. As a result, the collector current of transistor 5.2 increases and its turn-on time slightly increases. Since at the same time the collector currents of transistors 5.I, 5.3 ... 5.P decrease, the turn-on time decreases accordingly. Therefore, you-; Equalization of the turn-on time of all common-mode transistors of cells 3.1 ... Z. p.

Claims (1)

A similar process takes place when the transistors are turned off. If, for example, transistor 5.2 begins to turn off first, then its collector current begins to decrease due to the redistribution of currents between the other transistors 5.1, 5.3 ... 5.n through capacitors 7.1-2, 7.2-3, 7. (n-l) -nj. The current through transistors 5.1, 5.3 ... 5.T1 increases, and the process of switching them off is accelerated, as with a larger collector current, the minority carriers p of the transistor base region become more rapidly dissipated, which reduces the turn-off time of the transistor. With a decrease in the collector current of truck-zystor 5.2 - the process of its shutdown is delayed. As a result, the temporal characteristics of the in-phase operation of their transistors occur, which leads to a uniform distribution of dynamic losses between 3.1 ... Z.p cells. Formula of Invention A multi-cell constant-voltage converter containing one-phase synchronously controlled inverter cells, each of which is made in a push-pull pattern with the first and second transistors and output transformers, whose outlet from the midpoint of the primary winding is connected to one of the input terminals, the emitters the transistors of all the inverter cells are connected to another input terminal, and the secondary windings of the output transformers of all the inverter cells are connected to each other in series and through a common surface the driver is connected to the output pins, that is, so that, in order to increase the reliability 516035016 by aligning the dynamic capacitors through which the collectors of the same name inverter cells are connected in pairs in the same transistors of all, n (n-1), transistors of all the inverter cells are introduced.