RU2461116C1 - Electromechanical device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: one uses a package of two automatic splitters, performing the rheostat output connection to the DC electric motor input; additionally, a drive is introduced as well as a toroidal potentiometer introduced between the three-phase rectifier output and the second input of the package of two automatic splitters, the potentiometer rigidly connected to such drive having an input connected to the second output of the said package of two automatic splitters.

EFFECT: capacity coefficient increase in case of operation at varied shaft rotation frequencies.

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 be a rectifier or a 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 enters the three-phase rectifier. The rectified direct voltage is supplied through an automatic release to the DC motor. However, the device cannot increase the power factor when operating at different shaft speeds.

Using the proposed device provides an increase in power factor when working at different speeds of rotation of the shaft.

This is achieved by using a block of two automatic releases and by connecting the output of the rheostat to the input of a DC motor, as well as by introducing a drive and introducing between the output of a three-phase rectifier and the second input of a block of two automatic releases of a toroidal potentiometer, rigidly connected to this drive with an input, connected to the second output of the aforementioned unit of two automatic releases.

In figure 1 and in the text the following notation

1 - direct current source;

2 - rheostat;

3 - block of two automatic releases;

4 - a direct current electric motor;

5 - synchronous generator;

6 - drive;

7 - toroidal potentiometer;

8 - three-phase rectifier.

The output of the direct current source 1 through the rheostat 2 is connected to the input of the DC motor 4 and to the first input of the block of two automatic releases 3 having a second input and a second output, respectively connected through a toroidal potentiometer 7 with the output of a three-phase rectifier 8, and with the input drive 6, rigidly connected to the aforementioned toroidal potentiometer 7, and the first output of the block of two automatic trip units 3 is connected to the input of the DC motor 4, rigidly connected to synchronous g a generator 5 having first, second and third outputs, respectively connected to the first, second and third inputs of a three-phase rectifier 8.

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, to a block of two automatic trip units 3, and to a direct current electric motor 4, rigidly connected to a synchronous generator 5. Using a rheostat 2, it is regulated the rotational speed of the motor shaft, and the generator 5 generates a three-phase alternating voltage into a three-phase rectifier 8, which converts the three-phase alternating voltage to constant, which then flows through the toroidal a potentiometer 7 to the second input of a block of two automatic trip units 3. The latter connects the output of the potentiometer 7 to the electric motor 4 only after fixing in the block 3 equal voltages from the source 1 and from the potentiometer 7. An example of the performance of the potentiometer is presented in the book by S.P. Kolosov et al. "Elements of Automation", ed. Engineering, Moscow, 1970, p. 105, Fig. 60.

And an example of the execution of automatic releases, which can also record the excess of one voltage 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 by M.A.Shustov “Power Sources and Stabilizers”, 2007, M., “Alteks”, p. 90. Automatic adjustment of voltage equality is as follows.

The shaft of the toroidal potentiometer 7 is rigidly connected to the drive 6. Initially, in the absence of equality of voltages supplied to the first and second inputs of a block of two automatic trip units 3, the first automatic trip unit 3 is triggered. Moreover, depending on the excess of potential coming to its first input, over the potential arriving at its second input, or exceeding the potential arriving at its second input, over the potential arriving at the first input, positive il will be issued from the second output of block 3 and negative voltage to the input of the drive 6, rigidly connected with the shaft of the toroidal potentiometer 7. As a result, the drive will rotate the potentiometer shaft in one direction or another, changing the voltage at its output, until the potential equality is fixed in block 3, and as a result of the operation of the second release, the above-mentioned addition of currents at the input of the electric motor 4 will not be carried out. Thus, when the rotational speed of the shaft of the electric motor 4 is changed, an automatic increase in power is provided due to addition of currents. The proposed device can be used in systems where both three-phase voltage consumers and actuating units are used in the form of, for example, wheelsets, screws, etc. Thus, the use of the proposed device will provide energy savings and will give an economic effect.

Claims (1)

An electromechanical device consisting of a direct current source, a rheostat, an automatic release of a DC motor, a synchronous generator and a three-phase rectifier, where the output of the DC 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 and with the input of a DC motor rigidly connected to a synchronous generator having first, second and third outputs, respectively but connected to the first, second and third inputs of a three-phase rectifier, characterized in that a block of two automatic releases is used and the output of the rheostat is connected to the input of a DC motor, and the drive is introduced and inserted between the output of the three-phase rectifier and the second input of the block of two automatic a toroidal potentiometer rigidly connected to this drive, having an input connected to the second output of the aforementioned unit of two automatic trip units.