DEVICE AND METHOD OF SOUND REPRODUCTION BY MEANS OF ELECTRIC WELDING ARC Russian patent published in 2024 - IPC H04R23/00 

FIELD: acoustics.

SUBSTANCE: apparatus for sound reproduction, which includes: an argon-arc welding apparatus comprising a first rectifier, the input of which is connected to an alternating voltage power supply; filter, the input of which is connected to the output of the first rectifier; an inverter, the input of which is connected to the output of the first rectifier, and a signal from the output of the control unit is transmitted to the second input; transformer, the input of which is connected to the output of the inverter; second rectifier, the input of which is connected to the output of the transformer; throttle, the input of which is connected to the output of the second rectifier, with the apparatus is configured to supply to the input of the adder of the proportional-integral feedback voltage regulator, which is a signal of the measured current at the output of the device; apparatus for argon-arc direct current welding, comprising a control unit; and an audio signal source in the form of an audio frequency alternating voltage; wherein the output of the audio signal source is connected to the input of the adder of the proportional-integral controller of the control unit of the welding machine with the possibility of transmitting an audio signal thereto; wherein the apparatus is configured to sum the audio signal with the setting voltage and feedback voltage signals, which is a signal of the measured current at the output of the apparatus; and the control unit is configured to generate from the sum of the audio signal, the setting voltage and reverse inverter control signal voltage in the form of a PWM signal.

EFFECT: providing the possibility of sound reproduction by means of the welding machine, increase of sound volume and quality.

6 cl, 2 dwg