RU2334350C1 - System of autonomous electric power supply - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: system of autonomous electric power supply consists of a source of direct current, a rheostat, automatic tripping device, the electric motor of direct current, the synchronous generator with the activator, the unit of automatic adjustment of the feed, the three-phase rectifier with a ripple filter and consumed units. The output of the source of direct current through a rheostat is connected to the second input automatic tripping device, which has the first input and the output accordingly connected to an output of the electric motor of direct current and through the unit of automatic adjustment of a feed - with an output of the three-phase rectifier with a ripple filter. The first, second and third inputs of the three-phase rectifier are accordingly connected to the first, second and third inputs of consumed units, and also with the first, second and third outputs of the synchronous generator with the activator. Electromagnetic coupling is rigidly connected with the electric motor of direct current and with the synchronous generator with the activator and has the input connected to an output second automatic tripping device, which has the first and second inputs connected according to the output of the rheostat and with the output of the block of automatic adjustment of the feed.

EFFECT: increase in the time of constant rotation of the shaft of the electric motor when the direct source of current is disconnected without an increase in the sizes.

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Description

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

A known system of autonomous power, described in the book of V.E. Chinas. "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 from a direct current source, 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 Chasovskaya A.A., dated September 27, 2006, bull. Number 27. In it, using a direct current source 1, 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. By means of an automatic trip unit, its 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. When the voltage drops from the output of the rectifier, the automatic release will disconnect its second input from the output of the automatic adjustment unit and reconnect the first input to the output of the DC source. However, it is impossible without increasing bulkiness to increase the time of constant rotation of the motor shaft with the DC source turned off.

Using the proposed system without increasing bulkiness increases the time of constant rotation of the motor shaft with the DC source turned off. This is achieved by introducing an electromagnetic clutch and a second automatic trip, while the electromagnetic clutch is rigidly connected to a DC motor and a synchronous generator with a pathogen and has an input connected to the output of the second automatic trip having the first and second inputs connected respectively to the output of the rheostat and the output of the automatic power control unit.

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

1 - direct current source;

2 - rheostat;

3 - automatic release;

4 - a direct current electric motor;

5 - electromagnetic clutch;

6 - synchronous generator with a pathogen;

7 - block automatic power adjustment;

8 - automatic release;

9 - three-phase rectifier with a smoothing filter;

10 - consumed nodes,

the output of the direct current source 1 through the rheostat 2 is connected to the second input of the automatic release 3 having an output and a first input, respectively connected to the input of the DC motor 4 and through the automatic power control unit 7 with the output of a three-phase rectifier with a smoothing filter 9, the first , the second and third inputs of which are respectively connected to the first, second and third inputs of the consumed nodes 10, as well as with the first, second and third outputs of the synchronous generator with the exciter 6, rigidly bound to the electromagnetic clutch 5 having a rigid connection to the DC motor 4 and having an input coupled to the output of the automatic trip unit 8, the first and second inputs connected respectively to the output of rheostat 2 and to the output of automatic power adjustment 7.

The operation of the device is as follows.

Using a direct current source 1, which can be, for example, a rechargeable battery or a rectifier, direct current is supplied through a rheostat 2, through an automatic release 3 to a direct current motor 4, whose shaft is rigidly connected to the synchronous generator shaft through an electromagnetic coupling 5 with exciter 6. The latter provides a three-phase alternating voltage to the consumed nodes 10 and to a three-phase rectifier with a smoothing filter 9. The value of the current from the output of the DC source 1 reg can be detected using rheostat 2. The power to the electromagnetic clutch 5 is supplied from rheostat 2 through an automatic release 8, which in its design does not differ from the release 3. In the initial state, the current value from rheostat 2 will not be enough for the electromagnetic clutch 5. of rheostat 2, the current increases and the electromagnetic coupling 5 is triggered. When the coupling is turned on, the rotation of the motor shaft 4 is transmitted to the shaft of the generator 6. When the coupling is disconnected, these shafts are disconnected. An example of a specific implementation of the electromagnetic clutch 5 is presented in the book B.C. Yampolsky. "Fundamentals of automation and electronic computing." Moscow, Enlightenment, p. 63, Fig. 241. An example of a specific embodiment of a synchronous generator with an exciter 6, where the excitation windings are excited by a direct current generator, is presented in the aforementioned first analogue on page 139, Fig. 94. From the output of a three-phase rectifier with a smoothing filter 9, the rectified voltage is supplied through the automatic power control unit 7 to the first input of the automatic release 3, with which it is automatically connected to its first or second inputs depending on the magnitude of the voltages supplied to these inputs. In particular, after fixing a certain voltage value from the rheostat, corresponding to the steady-state mode of operation of the DC motor 4, in the automatic release 3, its first input is connected to the output of the automatic power control unit 7. An example of a specific embodiment of the automatic release is presented, for example, in book E. S.Traube and V.G. Mirgorodsky on pp. 142-143. After the aforementioned connection of the automatic power control unit, when the voltage decreases below the reference, the voltage supplied through the automatic release 3 to the DC motor 4 is stabilized in the unit 7. However, when the voltage at the output of the unit 7 starts to drop, the automatic release 3 will connect the rheostat 2 to the electric motor 4 . After stabilizing the voltage, the automatic release 8 is disconnected from the rheostat 2 and connected to the output of the automatic power control unit 7, from which Further, the electromagnetic coupling 5 is supplied with power. However, when the voltage at the output of the unit 7 drops below the adjustable one, the electromagnetic coupling 5 is disconnected and the motor and generator shafts are disconnected and the rotational speed of the motor shaft increases due to its operation without load. With a further voltage drop at the output of block 7, the output of the rheostat 2 is connected to the release 8, and the voltage will be supplied to the electromagnetic coupling 5, which is turned on by connecting the shafts. However, since the rotational speed of the motor shaft was previously increased, the rotational speed of the generator shaft will also increase.

The system can be used for economical operation of the power source.

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 an exciter, 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 a first input and output, respectively connected to the output of the DC motor and through the unit automatically th 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 electromagnetic a clutch and a second automatic trip, while the electromagnetic clutch is rigidly connected to a DC motor and a synchronous generator with a pathogen and has an input connected to the output of the WTO th automatic release having first and second inputs connected respectively to the output resistors and to the output of automatic power adjustment.