SU1467733A1 - Independent power supply source - Google Patents

Abstract

The invention relates to electrical engineering, in particular to autonomous power supply systems with high power quality. The aim of the invention is to improve the quality of electric power and increase efficiency. A synchronous generator with excitation from permanent magnets contains according to the included first and second core windings, the free terminals of the first of which are connected to the load through the main rectifier and filter. The connection points of the core windings, as well as the free outputs of the second one, are associated respectively with the input and the first and second additional rectifiers, the output of which includes the first and second keys controlled in counter-phase from the pulse-width voltage regulator. In the process of energy regulation, the load comes either from the first main winding of the synchronous generator, or from two according to the included cores of the windings. At the same time, good quality of electricity is ensured with high efficiency. 2 Il.

Description

one .

The invention relates to electrical engineering, in particular to autonomous power supply systems with high power quality.

The purpose of the invention is to improve the quality of electricity and increase the KCD.

FIG. 1 shows an electrical circuit of an autonomous power source; in fig. 2 - voltage diagrams at the generator output.

The autonomous power supply contains a synchronous generator 1 with excitation from permanent magnets and with two according to the included main windings 2 and 3, the free terminals 4 of which are connected through the main rectifier 5 with the terminals 6 for connecting the load (not shown). The inputs 6 of the measuring organ 7, the output of which is connected to the input of the voltage regulator 8, also connects the non-inverting output of the latter to the control input of the first switch 9 connected to the output of the first additional rectifier 10, whose input is connected to the junction points two core windings 2 and 3 of the synchronous generator 1, the device also contains the second additional rectifier 11 and the second key 12.

The voltage regulator 8 is made on the basis of a pulse width modulator

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with the second inverting output connected to the control by the input of the key 12 connected to the output of the second additional slot 11, the input of which is connected to the free drives of the second crust winding 3 of the synchronous generator 1. The output of the main rectifier 5 can be switched on 13.

The power supply operates as follows.

If the first key 9 is closed and the second key 12 is open, then the output voltage of the generator is determined by the magnitude of the electromotive force induced in the first main winding 2 (W), and its amplitude, and (figure 2) has the smallest value . If the second key 12 is closed, and the first key 9 is open, the voltage at the generator output is determined by the magnitude of the electromotive force induced in the two core windings 2 and 3 (W + Wj), and its amplitude U. has the greatest value. The keys 9 and 12 periodically and alternately switch with a frequency f „1 / T (key switching period) much greater than the generator voltage frequency f 1 / T g (T g is the generator voltage period) Higher switching frequency necessary for normal operation of the voltage regulator, as well as for increasing the ripple frequency of the output voltage in order to reduce the mass and size of the filter 13. The voltage curve at the generator output, for example, at Tg / Tc 5, is shown in FIG. 2. The average value of the voltage at the output of the autonomous source of electricity is controlled by changing the pulse filling factor -jt ,, / T (tu duration according to the law of pulse-width modulation with the help of a pulse-width modulator 8, which forms two inversion impulse signals with keys, the fill factor of which changes according to the law of pulse-width modulation depending on the error signal between the reference and output voltages supplied to the pulse width coherent integrated modulator 8 with the measuring element 7 ..

The alternate switching of triode keys 9 and 12 eliminates the short closure of the core winding during voltage regulation, so the generator generates as much electrical energy as the consumer needs during the key switching period, which increases the energy performance of the system.

Thus, the invention makes it possible to improve power quality and increase efficiency.

Claims (1)

Invention Formula A self-contained power supply containing a synchronous generator with excitation from permanent magnets and with two according to included main windings, the free terminals of the first of which are connected to the terminals through the main rectifier to the terminals for connecting the load to which the input of the measuring body is also connected, input voltage regulator, non-inverting. the output of the latter is connected to the control input of the first switch connected to the output of the first additional rectifier, the input of which is connected to the junction points of the two main windings of the synchronous generator, characterized in that, in order to improve the quality of electric power and increase efficiency, a second additional 1 the expander and the second key, the voltage regulator is made on the basis of a pulse-width modulator, with a second inverting output connected to the control input of the second key connected to the output of the second additionally rectifier, the input of which is coupled to the second anchor pin free synchronous generator winding. 0ue.Z