SU61207A1 - Capacitor Asynchronous Phase Converter - Google Patents

Description

In many cases, the practice has come to transform a single-phase alternating current of high voltage into a three-phase low-voltage current. However, the known types of phase converters are not suitable for use in conditions of mobile objects due to their operational properties.

The proposed converter serves to convert a single-phase high-current overvoltage current into a three-phase low-voltage current and vice versa. A schematic diagram of the proposed phase converter is shown in the drawing.

By design, the phase converter is a conventional short-circuited asynchronous motor.

On the stator there are three windings a, b, and &. The windings a and b are single-phase, high-voltage; their axes are shifted one relative to the other by 90 electrical degrees; A winding is three-phase, low voltage. The rotor has a short-circuited winding with possibly low resistance. In one of the single-phase windings, a capacitor battery K and an active resistance K are connected in series. With the appropriate selection of the parameters of the crushing a and b, capacitance and resistance and supply of the windings a and b with current

high voltage, you can get a circular rotating & magnetic field

and a completely symmetrical voltage on the three-phase windings. Assuming asymmetry of stresses can be avoided without the inclusion of active resistance B in the primary circuit.

SUBJECT OF INVENTION

A capacitor asynchronous phase converter with a three-phase secondary winding, characterized by the use of a primary single-phase current system from two windings whose axes are shifted in space by 90 electrical degrees and in series with one of the windings are included adjustable capacitance and resistance to obtain a phase shift of 90 degrees electrical degrees of current from both windings.