RU2568658C2 - Electromechanical device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: first, second and third inputs and the first and second outputs of two automatic circuit breakers are coupled respectively to output of three-phase rectifier with smoothing filter, with output of stabilizing unit, with output of power supply source of reduced power, with input of drive and input of toroidal potentiometer fixed rigidly to the drive and having output connected to the second input of automatic circuit breaker.

EFFECT: permanent rotation of the electric engine haft at unstable load due to introduced block consisting of two automatic circuit breaker, drive and toroidal potentiometer.

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Description

The invention relates to the field of electrical engineering and can be used in power supply systems and control actuators.

Known electromechanical device, which is part of an autonomous power supply system, presented in patent No. 2284644 (author A. Chasovskaya). In it, with the help of a direct current source, which can be a battery or a rectifier, direct current is supplied through a rheostat, through an automatic release to a direct current electric motor, the shaft of which is rigidly connected to the shaft of the synchronous generator with the exciter. The device can provide power to the objects and the operation of executive nodes. An alternating three-phase voltage is supplied to a three-phase rectifier with a smoothing filter that converts the alternating voltage to direct. From the output of the rectifier, the rectified voltage enters the stabilization unit, which is an automatic power control unit. And when the voltage drops below a certain value, the automatic release will connect a DC source to the electric motor. Next, the above action will be repeated again. Thus, due to the feedback between the synchronous generator and the electric motor, the aforementioned units carry out the rotation of the motor shaft without a power source for some time. However, the device cannot provide a constant rotation of the motor shaft.

Known electromechanical device described in patent No. 2427070 (author Chasovskoy A.A.), BU No. 23 from 08.20.11. It, in contrast to the above, provides an increase in the rotation time of the motor shaft with an increased load due to the introduction of a reduced battery power and voltage multiplier, which can be represented as a power source of reduced power. However, under unstable load, the rotation of the motor shaft is not constant.

Using the proposed device provides a constant rotation of the motor shaft under unstable load.

This is achieved by introducing a block of two automatic releases, a drive and a toroidal potentiometer,

the first, second and third inputs and the first and second outputs of the block of two automatic releases are respectively connected: with the output of a three-phase rectifier with a smoothing filter, with the output of the stabilization unit, with the output of a reduced power source, with the input of the drive and with the input of a toroidal potentiometer, rigidly connected to the drive and having an output connected to the second input of the automatic release.

In FIG. 1 and the following notation is used in the text:

1 - direct current source

2 - rheostat

3 - automatic release

4 - DC motor

5 - synchronous generator with a pathogen

6 - drive

7 - toroidal potentiometer

8 - block of their two automatic releases

9 - stabilization unit

10 - reduced power supply

11 is a three-phase rectifier with a smoothing filter, while the output of the DC source 1 through the rheostat 2 is connected to the first input of the automatic release 3 having a second input and output, respectively connected to the output of the toroidal potentiometer 7 and to the input of the DC motor 4, rigidly connected with a synchronous generator with a pathogen 4 having first, second and third outputs, respectively connected to the first, second and third inputs of a three-phase rectifier with a smoothing filter 11 having an output dintered with the first input of a block of two automatic releases 8 and through the stabilization block 9 with the second input of this block 8 having a third input, the first and second outputs, respectively connected to the output of the power supply of reduced power 10, with the input of the drive 6, with the input of a toroidal potentiometer 7, rigidly connected to the drive 6.

The operation of the device is as follows

Using a direct current source 1, which can be a rechargeable battery or a rectifier, direct current is supplied through a rheostat 2, through an automatic release 3 to a direct current electric motor 4, the shaft of which is rigidly connected to the shaft of a synchronous generator with an exciter 5, which produces a three-phase alternating voltage in a three-phase rectifier with a smoothing filter 11, which converts AC voltage to DC. From the output of the rectifier 11, the rectified voltage enters through the stabilization unit 9, which maintains the voltage when it decreases, to the second input of the block of two automatic releases 8, which has a first input connected to the output of the rectifier 11, and the DC voltage from the power supply is reduced to the third input power 10.

In the presence of a stabilized voltage at the output of the stabilization unit 9, the first release of block 8 will trip and provide a connection of the outputs from block 9 and the source 10 to one output from block 8, connected to the second input of the toroidal potentiometer 7, from the output of which voltage is supplied to the second input of the automatic release 3 , which will work and pass the voltage from the output of block 8 to the input of the DC motor 4. In the initial state, the potentiometer 7 is set to the middle position. In block 8, a positive or negative potential is formed due to the determination of the voltage difference from the stabilization unit 9 and the rectifier 11. If there is such a potential, a second trip is triggered and passes this potential to the drive 6. As a result, the drive shaft 6, rigidly connected to the shaft of the toroidal potentiometer, starts to rotate clockwise or counterclockwise. As a result, the voltage at the output of the toroidal potentiometer 7 changes until the voltage at the output of the rectifier 11 becomes equal to the voltage at the output of the stabilization unit 9, providing rotation of the motor shaft with a constant frequency. Thus, the adjustment is made at the input of the electric motor 4, including under unstable load, and the stabilization capabilities are improved.

A variant without a stabilization unit 9 is possible. In this case, the potential supplied to the drive 6 may depend on the voltage difference between the source 10 and the rectifier 11, if the voltage from the rectifier 11 is not lower than a certain value, at which the first trip unit 8 also trips connects the outputs from the rectifier 11 and from the source 10 into one output from the block 8, connected to the input of the toroidal potentiometer 7.

An example of a specific implementation of the stabilization unit is presented in the book of MA Shutova "Power supplies and stabilizers", M., Dom-Dodeka XXI "Altex". 2007, p. 103, fig. 9.3, 9.4.

An example of the execution of a toroidal potentiometer is presented in the book of the joint venture. Kolosov and others. "Elements of automation", ed. Engineering, 1970, p. 105, fig. 60.

An example of the performance of automatic releases, which can record the absence of voltage or the determination of its excess over another or the absence of excess, is presented in the book by E.S. Traube and V.T. Mirgorodsky, 1985, M., Higher School, pp. 142-143, as well as in the book of M.A. Shustov “Power Sources and Stabilizers”, 2007, M., “Alteks”, p. 90.

If the voltage at the output of the toroidal potentiometer 7 is lower than the allowable level, the automatic release 3 will connect the source 1 to the input of the electric motor until the voltage at the output of the rectifier 11 increases. Thus, the use of the proposed device will save energy.

Claims (1)

An electromechanical device consisting of a direct current source, a rheostat, an automatic trip unit, a direct current electric motor, a synchronous generator, a three-phase rectifier with a smoothing filter, a stabilization unit and a reduced power supply, where the output of a direct current source through a rheostat is connected to the first input of an automatic release having output connected to the input of a DC motor rigidly connected to a synchronous generator with a pathogen, the first, second and t the outputs of which are connected respectively to the first, second and third inputs of a three-phase rectifier with a smoothing filter, characterized in that a block of two automatic releases, a drive and a toroidal potentiometer is introduced, with the first, second and third inputs and the first and second outputs of the block of two automatic releases are respectively connected to the output of a three-phase rectifier with a smoothing filter, with the output of the stabilization unit, with the output of a reduced power source, with the input of the drive and with the input a toroidal potentiometer rigidly connected to the drive and having an output connected to the second input of the automatic release.