RU2419955C1 - Electric power supply system of objects - Google Patents

Abstract

FIELD: electricity. ^ SUBSTANCE: system includes direct current source, dc electric motor rigidly connected to synchronous generator with exciter having the first, the second and the third outputs which are connected to: the first input of consumed nodes, to the second input of consumed nodes, and through single-phase stabiliser with rectifier to the first input of automatic tripping mechanism, which has the second input and output, which are respectively connected to output of dc supply and to input of dc motor; storage battery of reduced capacity is connected through voltage multiplier to the first input of automatic tripping mechanism. ^ EFFECT: increasing time of rotation of electric motor shaft owing to compensation of power loss. ^ 1 dwg

Description

The invention relates to the field of electrical engineering and can be used to ensure economical energy consumption.

A known power supply system of objects described in patent No. 2316108. It contains a DC source, having an output connected through an automatic trip unit to the output of a DC motor, a shaft that is rigidly connected to the shaft of the synchronous generator with an exciter, which produces three-phase voltage to the consumed nodes and through the stabilizer to a rectifier, which converts the alternating voltage to constant, which flows further through an automatic trip to an electric motor. Depending on the voltage value, the trip unit connects either a current source or a rectifier. However, the rotation time of the motor shaft cannot be increased.

Known power supply system of objects presented in patent No. 2372709. In it, the source can supply direct current through an automatic trip to a direct current electric motor, the shaft of which is rigidly connected to the shaft of a synchronous generator with an exciter, producing two phases coming to the consumed nodes, and one phase coming to the stabilizer with a rectifier. The latter can produce a constant voltage through an automatic trip to the electric motor. It uses a rheostat to adjust the direct current.

Depending on the magnitude of the voltages supplied to the first or second inputs of the electric motor, either a current source or a stabilizer is connected. However, the rotation time of the motor shaft cannot be increased. Using the proposed device, the rotational time of the motor shaft increases many times. This is achieved by the introduction of: a battery of reduced power and a voltage multiplier; wherein the output of the battery of reduced power through a voltage multiplier is connected to the first input of the automatic release.

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

1 - direct current source;

2 - automatic release;

3 - DC motor;

4 - synchronous generator with a pathogen;

5 - voltage multiplier;

6 - single-phase stabilizer with a rectifier;

7 - rechargeable battery of reduced power;

8 - consumed nodes,

wherein the DC motor 3 is rigidly connected to a synchronous generator with an exciter 4 having first, second and third outputs, respectively connected: to the first input of the consumed nodes 8, with the second input of the consumed nodes 8 and through a single-phase stabilizer with rectifier 6, through a voltage multiplier 5 with the output of the battery of reduced power, in addition, the output of the voltage multiplier 5 is connected to the first input of the automatic release 2, the second input and output of which are respectively connected to the source output DC 1 and with the input of a DC motor.

The device operates as follows. Using a direct current source, which can be a battery or a rectifier, a direct current is supplied through an automatic release 2 to a direct current electric motor 3. A rheostat is used to adjust the direct current in the electric motor. The shaft of the electric motor 3 is rigidly connected to the shaft of the synchronous generator with the exciter 4, issuing 2 phases of alternating current to the consumed nodes 8 and one phase to the stabilizer with a rectifier 6. An example of a direct current electric motor is presented in the book “Reference book on electric machines” by M. M. Katsman , pp. 302-309, 2005. An example of a synchronous generator with an exciter is presented in the book by V. A. Kitaev “Electrical Engineering with the Fundamentals of Industrial Electronics” - M., Higher School, 1985, p. 139, Fig. 94.

In the stabilizer 6, with a decrease in certain limits of the single-phase alternating voltage at the input, the output carries a nominal constant voltage supplied to the aforementioned automatic release 2.

An example of a specific implementation of an automatic trip unit is presented in the book “Electrical Engineering and Fundamentals of Electronics” by E. S. Traube and V. G. Mirgorodsky, M., Higher School, 1985, pp. 142-143.

An example of a specific implementation of a single-phase stabilizer with a rectifier is presented in the book "Power Supplies and Stabilizers" M.A.Shustova, M., 2007, pp. 142-144, Fig. 11.5, 11.19. In this case, the rectifier can be made with a smoothing filter. However, with an increase in the load on the generator arising from the connection of the consumed nodes 8, a drop in the power supplied to the electric motor through an automatic trip occurs. To compensate for the power drop, in contrast to the main analogue, a reduced battery 7 and a voltage multiplier 5 are introduced into the proposed device. The battery power is less than the power of the DC source 1. Current from the battery is supplied to the voltage multiplier 5, where the voltage is multiplied to equal to the voltage at the output of the stabilizer 6. This eliminates the change in voltage supplied through an automatic release 2 to the input of the electric motor. Thus, the power increment at the output of the multiplier 5 compensates for the loss of power due to the connection of the consumed nodes 6. The example of a specific design of the voltage multiplier is presented in the aforementioned book by M.A.Shustov on pages 33-35. The method of work is as follows. After fixing a certain voltage from a direct current source in the automatic releases 2, its first input is connected to the outputs of a single-phase stabilizer with a rectifier 6 and a voltage multiplier 5. After this, the rotation of the motor shaft is constant due to its inertia. If the load in the consumed nodes 8 is higher than the permissible one, the voltage at the input of the stabilizers may become lower than the permissible one.

In this case, due to the voltage drop at the output of the stabilizer, the automatic release 2 temporarily connects a direct current source 1 to its second input. Thus, the proposed device with a nominal load in the consumed nodes almost constantly rotates the motor shaft with less battery power 7, than the power of a direct current source, which provides energy savings. Recharging the battery can be carried out from a two-phase network.

Claims (1)

The power supply system of the facilities, consisting of a direct current source, an automatic trip unit, a direct current electric motor, a synchronous generator with an exciter, a single-phase stabilizer with a rectifier and consumed components, where a direct current motor is rigidly connected to a synchronous generator with an exciter having the first, second and third outputs, respectively connected to the first input of the consumed nodes, with the second input of the consumed nodes and through a single-phase stabilizer with a rectifier with the first input a automatic release having a second input and output, respectively connected to the output of the DC source and the input of the DC motor, characterized in that it is introduced: a battery of reduced power and a voltage multiplier, while the output of the battery of reduced power through a voltage multiplier is connected to the first input of automatic release.