RU2396694C1 - Self-contained power supply system - Google Patents

Abstract

FIELD: electricity. ^ SUBSTANCE: self-contained power supply system increases the operating time owing to introduction of unit consisting of two automatic tripping devices and battery charging device. The first and the second output of synchronous generator with exciter is connected to the first and the second input of unit consisting of two automatic tripping devices, which has the third input and the first and the second outputs, which are connected to output of automatic power control unit and through battery charging device - to the first and the second inputs of storage battery. ^ EFFECT: improving reliability. ^ 1 dwg

Description

The invention relates to the field of electrical engineering and can be used to power objects.

A well-known system of autonomous power supply, described in the book of V.E.Kitaev "Electrical Engineering with the basics of industrial electronics." M .: Higher School, 1985, pp. 138-140. In it, with the help of a direct current electric motor, powered by a direct current source, which can also be a battery, the shaft of the synchronous generator with the exciter is rotated. The current from the output of the direct current source is regulated using a rheostat, and the three-phase voltage from the synchronous generator is supplied to the nodes of consumption. However, the system requires constant connection of a DC source.

A known system of autonomous power supply, as set forth in patent No. 2284644, by A. Chasovskaya, dated September 27, 2006, bull. Number 27. In it, using a direct current source, which is a battery, direct current is supplied through a rheostat, an automatic trip to a direct current electric motor, with the help of which the shaft of a synchronous generator with a pathogen is rotated. The latter generates a three-phase alternating voltage in the consumed nodes and in a three-phase rectifier with a smoothing filter. With the help of an automatic release, the first input is connected to the output of the automatic power control unit, after which the motor shaft continues to rotate, which makes it possible to keep the shaft rotating for some time using the automatic power control unit. If the voltage drops from the output of the rectifier below the adjustable level, the automatic release will disconnect its first input from the output of the automatic adjustment unit and connect the second input to the output of the DC source. However, the operating time is limited due to the impossibility of recharging the battery without stopping the motor.

Using the proposed system increases the operating time. This is achieved by introducing a block of two automatic releases and a battery recharging device.

In the drawing and in the text, the following notation:

1 - rechargeable battery;

2 - rheostat;

3 - automatic release;

4 - a direct current electric motor;

5 - synchronous generator with a pathogen;

6 - block automatic power adjustment;

7 - three-phase rectifier with a smoothing filter;

8 - battery recharging device;

9 - block of two automatic releases;

10 - consumed nodes,

the first, second and third outputs of the synchronous generator with the exciter 5 are connected respectively to the first, second and third inputs of the consumed nodes 10 and a three-phase rectifier with a smoothing filter 7, the output of which is connected through the automatic power control unit 6 to the first input of the automatic release 3, having the second input and output, respectively connected through a rheostat 2 with the output of the battery and with the input of the DC motor 4, rigidly connected to the synchronous generator from the exciter 5, the first and second outputs of which are also connected to the first and second inputs of a block of two automatic releases 9, having a third input and first and second outputs, respectively connected to the output of the automatic power control unit 6 and through the battery charging device 8 with the first and second battery inputs 1.

The system is as follows.

Using the battery 1, the direct current is supplied through the rheostat 2, the automatic release 3 to the direct current electric motor 4, which is rigidly connected to the synchronous generator with the exciter 5. The latter provides a three-phase alternating voltage to the consumed nodes 9 and to the three-phase rectifier with a smoothing filter 7. C using the automatic release 3, its input is connected to the output of the automatic power control unit 6, after which the motor shaft continues to rotate, which makes it possible Using the automatic power control unit 6, keep constant rotation of the shaft for some time without connecting the battery. When the voltage at the output of the rectifier 7 is lower than the regulated one, the automatic release 3 will disconnect its second input from the output of the automatic control unit 6, where the voltage will also drop and reconnect the first input to the output of the battery 1. As a result, the voltage at the output of the rectifier 7 and the automatic power control unit 6 will increase, which will also fix a block of two automatic releases 9, which will work and connect two phases from a synchronous generator with exciter 5 to the battery recharging device 8, issuing the “plus” and “minus” of the rectified voltage to the battery 1. At the same time, charging is carried out during periods of lack of discharge. An example of a device for charging a battery is presented in the book of M.A. Shustov "Control and protection of power supplies." M .: Publishing House Dom Dodeka-XXI "Altex", 2007, p. 152, where the battery is periodically recharged. An example of the execution of an automatic release, including that included in block 9, is presented in the book "Electrical Engineering and Electronics Basics" by E.S. Traube and V.G. Mirgorodsky, 1085, pp. 142-143. To the output of block 9, you can also connect a charger with an additional battery.

This ensures uninterrupted operation of the system, which increases the economic effect.

Claims (1)

An autonomous power supply system consisting of a direct current source, a rheostat, an automatic trip unit, a direct current electric motor, a synchronous generator with a pathogen, an automatic power control unit, a three-phase rectifier with a smoothing filter and consumed nodes, where the output of the direct current source through the rheostat is connected to the second input of the automatic a trip unit having an output and a first input, respectively connected to the input of a DC motor and through an automatic power control - with the output of a three-phase rectifier with a smoothing filter, the first, second and third inputs of which are respectively connected to the first, second and third inputs of the consumed nodes, as well as with the first, second and third outputs of the synchronous generator with a pathogen, characterized in that the block is introduced of two automatic releases and a battery recharging device, while the first and second outputs of the synchronous generator with the exciter are connected to the first and second inputs of the block of two automatic releases, having present third input and first and second outputs respectively connected to the output of the automatic adjustment and power through the battery charging unit - with the first and the second battery input.