RU2464698C2 - Asynchronous electric motor controlled by electronic method and device to inspect and adjust voltage control units - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: asynchronous electric motor comprises an input switch, connected via a line filter with an electronic frequency converter connected to a three-phase asynchronous electric motor, which, according to the invention, comprises a digital control panel, designed to select a mode of operation (setting of a rotation speed) of an electric motor. Also a device is proposed to inspect and adjust voltage control units, comprising a bench of units inspection, an asynchronous electric motor controlled by an electronic method (an input switch, a line filter, an electronic frequency converter with a digital control panel, a three-phase asynchronous electric motor), connected via a reducer with a generator, a fan, a bench of load switching, an active load. To achieve the technical result, consisting in higher efficiency of frequency and generator operation mode control, the above asynchronous electric motor controlled by the electronic mode and the reducer are applied, which actuate the generator forming three-phase voltages controlled by a bench of blocks inspection by frequency and voltage with the specified characteristics of power quality.

EFFECT: reduced level of noise and higher safety of an asynchronous electric motor controlled by electronic method with simultaneous provision of high weight and dimension characteristics.

2 cl, 2 dwg

Description

These inventions relate to digital control and regulation systems with an analog output and can be used to regulate and verify control units, control and protection of power supply systems in a closed circuit (with feedback).

This group of inventions relates to objects, one of which is intended for use by the other.

The essence of the first invention lies in the fact that the choice of the operating mode of the induction motor is provided on the digital control panel of the frequency converter, i.e. The electronic way of operating mode control is applied.

Currently, a device is known in which the regulation of the rotational speed (rotational speed) of an actuator (for example, a generator) is carried out by an internal combustion engine drive.

The disadvantage of this device is its large weight and size characteristics, the use of a flammable liquid as a fuel for an internal combustion engine, as well as an increased noise level.

The present invention is directed to a device in which these disadvantages of the prior art are overcome.

To solve this problem and achieve a technical result, a device is proposed that contains an input switch, a line filter, an electronic frequency converter with a digital control panel, a three-phase asynchronous motor.

The invention is illustrated in the structural diagram of figure 1, which shows the component parts (blocks) of the device with their name:

1) input switch;

2) surge protector;

3) an electronic frequency converter with a digital control panel;

4) three-phase asynchronous electric motor.

Power supply 3 f 50 Hz 380 V from the power panel through the input switch 1 and the power filter 2 is fed to an electronic frequency converter 3 with a digital control panel. On the digital control panel of the frequency converter, the operating mode (setting the rotation speed, on and off modes) of the three-phase asynchronous motor 4 is selected.

The voltage from the electronic frequency converter 3 is supplied to a three-phase asynchronous electric motor 4.

The essence of the second invention lies in the fact that to increase the efficiency of controlling the frequency and operating mode of the generator, an electronically controlled asynchronous electric motor with a gearbox is used.

To solve the problem and achieve the technical result of the second invention, a device is proposed that includes a block test stand, an electronically controlled asynchronous electric motor (input switch, line filter, electronic frequency converter with digital control panel, three-phase electric motor) connected through a gearbox to a generator, a fan, load switching stand, active load, allowing to control the generator speed (to regulate the frequency), forming a phase voltages of the generator (3 f 400 Hz 220 V (3 f 400 Hz 208 V)), controlled by a test stand for blocks of frequency and voltage with specified characteristics of the quality of electricity.

The invention is illustrated in the structural diagram of figure 2, which shows the components (blocks) of the device with their name:

1) Stand for checking blocks;

2) an electronically controlled asynchronous electric motor, consisting of: an input switch; surge protector; electronic frequency converter with digital control panel; three-phase asynchronous electric motor;

3) gearbox;

4) generator;

5) a fan;

6) load switching stand;

7) active load.

The device, the structural diagram of which is shown in FIG. 2, is a stand consisting of a block test stand for connecting the unit under test to the outputs of a generator 4 connected to an electronically controlled three-phase asynchronous motor 2, which drives a generator 4 forming three-phase ones through a reducer 3 line voltages with a frequency of 400 Hz and 800 Hz. These voltages go to the test bench of units 1, which controls the output voltages of the generator 4 in frequency and voltage with the specified characteristics of the quality of electricity. Active load 7 is the load for voltage generator 4, the switching stand of load 6 is powered by a voltage of DC 27 V and performs step-by-step adjustment of the load resistance (0%, 50%, 100%). The fan 5 is designed for cooling (heat removal) of the active load 7. The inclusion of the active load is blocked when the fan 5 is off.

Claims (2)

1. Electronically controlled asynchronous electric motor, comprising an input switch connected via a line filter to an electronic frequency converter, which is connected to a three-phase asynchronous electric motor, characterized in that it comprises a digital control panel for selecting an operating mode (setting the rotation speed) of the electric motor. 2. A device for checking and adjusting voltage control units, comprising a unit test unit, an electronically controlled asynchronous electric motor (input switch, line filter, electronic frequency converter with digital control panel, three-phase asynchronous electric motor) connected through a gearbox to a generator, fan, stand load switching, active load, characterized in that, to increase the efficiency of controlling the frequency and operating mode of the generator, controlled electronically asynchronous motor and reduction gear, resulting in a generator which generates three-phase voltage-controlled test stand blocks in frequency and voltage with predetermined power quality characteristics.

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