SU1181094A1 - One-phase cascade generator - Google Patents

Abstract

A SINGLE-PHASE CASCADE GENERATOR containing a transformer with r primary and N secondary windings, each of which is connected to one of a system of N bridge rectifiers connected in series, as well as a capacitance filtering circuit that, in order to increase reliability (N -1) filtering capacitors are included each between the same terminals of the adjacent windings.

Description

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The invention relates to electrical engineering and can be used as a high direct voltage power supply for electrophysical equipment. The purpose of the invention is to increase reliability. FIG. 1 is a schematic diagram of a single-phase cascade generator} in FIG. 2 - time diagrams of the stresses acting in the generator. The single-phase cascade generator contains the primary winding 1, the magnet wire 2 and N (at least two) “cascades. The numerals denote the elements of the two first and last cascades. Gates 3-6 are connected according to the single-phase bridge rectifier circuit to the input of which the 7 and 8 secondary windings 9 are turned on. Gates 10-13 are connected According to the bridge rectifier design, the 14 and 15 secondary windings are connected to the input circuit. and 6 are interconnected and connected to the anodes of the valves 10 and 11. The interconnected anodes, the vents 3 and A are the negative pole of the generator output. Interconnected cathodes of valves 12 and 13 are connected to the anodes of the valves of the next cascade. The gates 17-20 are connected according to the bridge bridge circuit,. To the input of which are connected the cables 21 and 22 of the last secondary winding 23. The interconnected anodes of the valves 17 and 18 are connected to the bridge rectifier of the preceding cascade. The connection point of the cathodes of the valves 19 and .20 is the positive field of the generator output. The filtering capacity 24 is connected between the like terminals 7 and 15, respectively, of the windings 9 and 16. The filtering capacity 25 is connected between the output 15 of the winding 16 and the output winding of the next follower and the same capacity of the last winding 23 and the same output. windings of the preceding cascade. In this case, the pin 21 is of the same name in the foil 15 installation 16. The capacitors and structural capacitances can be used as filter capacitors. The device works as follows. When the primary winding 1 is connected to an alternating voltage source, alternating current flows through it, and the secondary windings 9, 16 and 23 induce electromotive forces (EMF). Let the polarity be as shown in FIG. 1. Then, under the action of the EMF, valves 3, 5, 11, 13, 17 and 19 are opened and a current flows through the cherzez. Its path is as follows: valve 3, outputs 8 and 7 of winding 9, valves 5 and 11, outputs 14 and 15 of winding 16, valve 13, the following stages, valve 17, outputs 22 and 21 of the last winding 23, valve 19, load. In this case, the output 7 of the winding 9 through the open valves 5 and 11 is connected to the output 14 of the winding 16, i.e. the capacitor 24 is connected in parallel with the winding 16 and is charged. Similarly, the capacitance 26 is charged from the winding 23, the capacitance 25 is charged from the winding of the third stage, etc. When the EMF passes through a maximum, the valves 5 and 11 are closed under the action of the difference of the potentials. between the terminal 14 of the winding 16 and the terminal 7 of the winding 9, created by the winding 16 and the capacitor 24. Analogously, the valves 13 and 17 are closed by the action of the corresponding potential differences. EMF through zero and changing its polarity valves 3 and 19 are closed and valves 4 and 20 open. When EMF in the secondary windings and the voltage on the capacitors are compared, valves 6, 10, 12 and 18 open. In this case, capacity 24 through open gates 6 and 10 will turn on in parallel flax winding 9 and recharging zhaets from this coil to the emf amplitude. Similarly, the capacity 25 is charged from the winding 16, the capacitance .26 from the winding is the last but one. go cascade. When the emf reaches an amplitude value, the charge of the trays of the trays, valves 6, 10, 12 and 18 are closed. The containers 24-26 are connected in series with the last winding 23. The current path is as follows: valve 5, tanks 24-26, winding 23, valve 20 and the load. When the EMF is changed, valves 4 and 20 are closed and valves 3 and 19 are opened. When the EMF reaches 3 in the secondary windings, the values equal to the value of the voltage on the capacitors open the valves 5, 11, 13 and 17, after which the processes are repeated periodically in the specified sequence. Curves 27-30 (figure 2) illustrate these processes. On the axis of the abscissa, the graphs in Fig. 2, the time t is plotted, | na6s x ordinates - voltage, from the non-HHbie to the amplitude of the EMF of one secondary winding. Curve 27 (Fig. 2) depicts the dependence of the EMF induced in the secondary windings 9, 16 and 23 on time, curve 28 shows the dependence of the voltage on the capacitor 24 (or any other) on time, curve 29 shows the dependence of the output voltage of the generator from time to time, curve 30 is the dependence of the potential of winding 9 in relation to the pole of the generator output. For comparison, oscillograms of voltages 31-33 are obtained when connecting a generator layout containing three cascades and assembled along. the circuit of FIG. t, to AC mains with a frequency of 50 Hz. The values of capacitances 24 and 25 are (3.5 microfarads each. To the output of the generator, a resistive load is connected with a resistance of 120 kOhm. Since the valves 3 and 19, or 4 and 20 are open at any time, the potentials of the windings 9 and 23 are set relative to the common point, the potentials of the winding 16 and all other windings relative to the winding 9 are defined by a chain of capacitances 24-26 are accurate to the magnitude of the pulsations. Since the potentials are secondary windings relative to the common point of the generator circuit are given by filtering capacitances that shunt parasitic capacitances, the voltages between the circuit elements cannot exceed the operating voltages. This reduces the probability of insulation breakdowns and increases the reliability of the generator. between the like clips of the secondary windings are almost constant, then with the appropriate construction of the generator to the electrical insulation, located between its elements, these constant voltages are applied, It also increases the reliability of the generator.

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Claims (1)

SINGLE-PHASE CASCADE GENERATOR, containing a transformer with r primary and N secondary windings, each of which is connected to one of the system of N bridge rectifiers connected in series, as well as filter capacities, which, in order to increase reliability, (N -1) filtering capacities are included each between the same terminals of adjacent windings. i