SU64410A1 - Power installation - Google Patents

Description

In a number of cases: (textile aggregates, paper machines, etc.)

.According to the work of two or

multiple engines required

mutual change in the speed of these

engines in relation to each

to a friend (elastic bond).

Until now, this requirement is caused by technological reasons, for example, stretching or shrinking of fabrics; satisfied with the use of engines and electrical equipment of direct current or the use of collector motors of alternating current. Due to the scarcity of the equipment of direct current and its unsuitability under environmental conditions (alkaline and acidic pairs unfavorable for the collector), as well as the high cost and unreliability of the operation of AC collector engines, industry has consistently put forward the requirements. the creation of appropriate conditions for the use of beskol. AC motors.

For mutual adjustment. The speeds of two asynchronous motors with slip rings in the J of the present invention are used in themselves known way of turning on a rotating auxiliary asynchronous mask into cutting the rotor circuit of two synchronously working asynchronous motors.

The essence of the invention is that, for the purpose of smoothly varying the ratios of the speeds of said engines in a wide range, the auxiliary machine is driven by the motor to drive a variable speed of direct or alternating current.

In FIG. 1 depicts the scheme of the proposed power plant; FIG. 2 - 3 - her options.

FIG. 1, numbers 1 and 2 denote asynchronous drive motors, a smooth variation of the speed ratio of which over a wide range is performed by a frequency reducer asynchronous machine 3 of low power, driven by the stator to the rotor circuit of the engine 1 and the rotor to the engine circuit 2.

As a drive motor for a frequency reducer, a direct current machine or an AC collector 4 can be used. The frequency reducer unit is obtained small POWER No. 64410 and can be removed from the production room. To increase the stability of synchronous operation of motors in the mode of small slip, it is possible to excite one of the stator windings of drive motors (or a specially laid winding) with direct current, as shown in FIG. 2, or disconnect one phase of the stator windings of the motors in order to form their inverse currents in the rotors, which may cause a synchronizing moment, as shown in FIG. 3. The subject matter of the invention I. A power plant consisting of two synchronously working asynchronous motors and an auxiliary asynchronous machine, connected by a stator to the rotor circuit of a single asynchronous motor and roor-to the rotor circuit of another motor, which is different in that the limits of variation in the ratio of the speeds of the motors, the auxiliary mask is driven by the motor of variable speed, direct or alternating current. 2.In the installation according to claim 1, the excitation of the stators of the motors by direct current in the small slip mode to increase the stability of the synchronous operation of the motors. 3. In the installation of claim 1, asymmetrical power supply of the engines in the mode of small slip to improve the stability of the synchronous operation of the engines.

FIG. 2

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FIG. 3

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