High-frequency power supply device and output control method thereof

By directly inputting the AC-DC converter and phase conversion circuit into the high-frequency amplifier, the ripple problem in the high-frequency power supply is solved, output control and response speed in the high-frequency band are improved, and the size of the power supply is reduced.

CN115053447BActive Publication Date: 2026-07-10KYOSAN ELECTRIC MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KYOSAN ELECTRIC MFG CO LTD
Filing Date
2020-12-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing high-frequency power supply devices suffer from ripple problems when converting three-phase AC power to DC, which limits the output voltage response speed and makes it difficult to perform output control in the high-frequency band.

Method used

An AC-DC converter is used to convert three-phase AC power to DC power, and the DC power is directly input to multiple FET elements through a high-frequency amplifier. A phase conversion circuit is used to provide the gate signal with a phase difference to cancel the phase difference contained in the DC power, thereby generating high-frequency AC power.

Benefits of technology

It effectively reduces ripple during DC-DC conversion, improves the response speed of the output voltage, enables output control in the high-frequency band, and reduces the size of the power supply unit.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a high-frequency power supply device and an output control method thereof, capable of reducing ripple when converting input from a three-phase AC power supply to DC and capable of performing output control in a high-frequency band. A high-frequency power supply device includes an AC-DC converter that converts input from a three-phase AC power supply to DC and a high-frequency amplifier that includes a plurality of FET elements and outputs high-frequency AC power, wherein the output of the AC-DC converter is directly input to the high-frequency amplifier, and the high-frequency power supply device further includes a phase conversion circuit that provides a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements. The input from the three-phase AC power supply is converted to DC and directly input to the high-frequency amplifier, and switching is performed by imparting a phase difference that cancels out fluctuation components included in DC to gate signals input to the plurality of FET elements, thereby generating high-frequency AC power.
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