DOUBLE-FREQUENCY APERIODIC CONVERSION DEVICE Russian patent published in 2010 - IPC H02M7/523 

FIELD: electric engineering.

SUBSTANCE: main circuit of double-frequency aperiodic conversion device comprises DC voltage source, two filter throttles, three controlled valves, two windings of inductor load and two capacitors, at the same time the first pole of DC voltage source is connected to the first output of filter throttle, the second output of which is connected to the first outputs of three controlled valves, at the same time the second output of the first controlled valve is connected to the first outputs of the first winding of load inductor and the first capacitor, the second outputs of which are connected to the second output of the second controlled valve, and also with the first outputs of the second winding of load inductor and the second capacitor, the second outputs of which are connected to the second output of the third controlled valve, at the same time the second output of the second controlled valve is connected to the first output of the second filter throttle, the second output of which is connected to the second output of DC voltage source, at the same time load inductor is arranged of two windings located along length of load inductor, at the same time windings of load inductor are connected as matched and serial to each other, and controlled valves are connected in straigh direction relative to polarity of DC voltage source. In case of repeated opening and closing of the first and second controlled valves, in the first winding of load inductor several periods of electromagnetic field high-frequency components are generated, and also "pack" of these periods generates the first half-cycle of low-frequency component of electromagnet field. If the second and third controlled valves are opened and closed same number of times, then high-frequency component of electromagnetic field is also generated in the second winding of load inductor, and also "pack" of these periods generates the second semi-cycle of low-frequency component of electromagnetic field. A version of device is also proposed with inductance-capacitance circuit adjusted for frequency of low-frequency component of electromagnetic field. Versions are also provided for aperiodic conversion devices made of two and three devices arranged according to the first version, in which double-phase or three-phase double-frequency electromagnetic field is generated due to phase shift achieved by law of controlled valves control, and this field provides for efficient induction heating and melting of metal and its efficient electromagnet mixing.

EFFECT: simultaneous generation of high-frequency and low-frequency components and simplification.

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