RU2453033C1 - Electromechanical device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: output of DC source is connected through rheostat to the first input of automatic release mechanism having the second input connected to output of three-phase rectifier with stabiliser the inputs of which are connected to outputs of synchronous generator. Output of automatic release mechanism is connected to input of DC motor rigidly attached to synchronous generator with exciter. Automatic release mechanism is actuated at equality of voltages. Potentiometer is installed between the second input of automatic release mechanism and output of three-phase rectifier with stabiliser. At that, rheostat output is connected to input of DC motor.

EFFECT: providing load increase without increasing the power of DC source.

1 dwg

Description

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

Known electromechanical device 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, using a primary motor, which may be a direct current electric motor, powered by a direct current source, the synchronous generator is rotated with the exciter. The shaft of the generator is rigidly connected with the shaft of the electric motor. The current output from the DC source is regulated by a rheostat. The device may provide power to objects or rotate an actuator assembly, such as a screw.

However, the device cannot maintain a constant rotation of the motor shaft with reduced power source. Known electromechanical device, which is part of an autonomous power supply system, presented by the author in patent No. 2284644. In it, with the help of a direct current source, which can also be a storage battery, 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 objects. Alternating voltage is supplied to a three-phase rectifier, which can be performed in one unit with a stabilizer.

The rectified stabilized constant voltage is supplied through an automatic release to the DC motor. However, the load cannot be increased without increasing the power of the DC source. Using the proposed device increases the load without increasing the power of the DC source.

This is achieved by using an automatic release, which works when the voltage is equal, and by introducing between the second input of this release and the output of a three-phase rectifier with a stabilizer, a potentiometer, as well as connecting the output of the rheostat to the input of a DC motor. In figure 1 and in the text the following notation:

1. direct current source;

2. rheostat;

3. automatic trip, triggered by equal voltage;

4. DC motor;

5. synchronous generator with a pathogen;

6. potentiometer;

7. three-phase rectifier with stabilizer;

In this case, the output of the DC source 1, through the rheostat 2, is connected to the input of the DC motor 4 and to the first input of the automatic release, triggered when the voltage 3 is equal, having a second input and output, respectively connected through a potentiometer 6 to the output of a three-phase rectifier with a stabilizer 7 and with the aforementioned input of a DC motor 4, rigidly connected to a synchronous generator with a pathogen 5, having first, second and third outputs connected respectively to the first, second and the third inputs of the aforementioned rectifier 7.

The operation of the device is as follows.

Using a direct current source 1, which can be a rechargeable battery or a rectifier, a direct current is supplied through a rheostat 2 to an automatic release, which works when voltage is equal 3, and to a direct current electric motor 4, rigidly connected to a synchronous generator 5. Using a rheostat 2 a certain rotation speed of the motor shaft is set, and the generator 5 produces a three-phase alternating voltage into a three-phase rectifier with a stabilizer 7, which converts the three-phase alternating voltage voltage is applied to the stabilized constant voltage, which then passes through the potentiometer 6 to the other input of the automatic release, which is activated when the voltages are equal 3. The latter carries out the connection of the potentiometer 6 to the electric motor 4. Previously, using the potentiometer 6, the voltage is adjusted from the output of the rectifier with stabilizer 7 until until it is equal to the voltage from the output of the rheostat 2.

When the load increases, a decrease in the three-phase voltage at the input of the rectifier with stabilizer 7 will not cause a change in the constant voltage at its output, if this decrease at the input is not lower than the permissible one. Otherwise, stabilization will not occur, the voltage at the output of the rectifier 7 will drop and the automatic release 3 will disconnect the output of the potentiometer 6 from the electric motor 4.

However, when the voltage stabilizes again with increasing voltage at the three-phase output of the synchronous generator with the exciter 5, the equality of the voltages from the DC source 1 and the rectifier 7 is again fixed in the automatic release 3. As a result, the automatic release 3 will trip and connect the input of the motor 4 to the output of the potentiometer 6. Thus, due to the lack of potential difference, the currents at the input of the electric motor 4 will be added, and therefore, the power will increase, according to stepping on this entrance, which will increase the maximum load. An example of a specific implementation of a three-phase rectifier with a stabilizer that can operate over a wide range of the three-phase voltage supplied to it is presented, for example, in the book by M.A.Shustov, M .: Ed. Dodeca House XXI Altex 200, p. 104, 135 “Power supplies and stabilizers, book 2. An example of the automatic release, which can operate even if the voltage is equal, is presented in the book“ Electrical Engineering and Electronics Basics ”by E. S. Traube and V. T. Mirgorodsky, 1985, Moscow: Higher School, pp. 142-143. The proposed device can be used, for example, in systems where a gearbox is rigidly connected to the generator shaft. At the same time, the following can be used as an executive unit: wheelsets, screw, propeller. Three-phase voltage can be supplied to consumed nodes. Thus, the use of the proposed device provides energy saving and gives an economic effect.

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 with an exciter, a three-phase rectifier with a stabilizer where the output of a direct current source through a rheostat is connected to the first input of an automatic release having a second input and output, respectively connected to the output of a three-phase rectifier with a stabilizer and with the input of a DC motor rigidly connected to a synchronous generator with a wake-up device having first, second, and third outputs, respectively connected to the first, second, and third inputs of the aforementioned three-phase rectifier with a stabilizer, characterized in that an automatic release is activated when the voltage is equal, and is inserted between the second input of the automatic release and the output of a three-phase rectifier with stabilizer; a potentiometer, and also connects the output of the rheostat with the input of a DC motor.