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Dead-time optimization of resonant inverters

A technology of dead time and inverter, which is applied to the parts of surgical instruments, heating surgical instruments, and output power conversion devices, etc., and can solve problems such as the decrease in efficiency of resonant inverters

Inactive Publication Date: 2014-12-24
TYCO HEALTHCARE GRP LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of the resonant inverter drops significantly due to the hard switching of the FETs to a large extent

Method used

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  • Dead-time optimization of resonant inverters
  • Dead-time optimization of resonant inverters
  • Dead-time optimization of resonant inverters

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Embodiment Construction

[0023] Specific embodiments of the present disclosure will be described below with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the disclosure, which may be embodied in various forms. Known functions or constructions are not described in detail to avoid obscuring the disclosure with unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ almost any appropriately detailed structural details. This disclosure. Throughout the description of the figures, like reference numbers may refer to similar or identical elements.

[0024] The present disclosure relates to an electrosurgical generator employing a phase-shifted full-bridge resonant inverter with an LCLC tank topology and an H-bridge. This generator use...

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Abstract

The present disclosure is directed to an electrosurgical generator including a resonant inverter having an H-bridge and a tank. A sensor array measures at least one property of the tank. A pulse width modulation (PWM) controller outputs a first PWM timing signal and a second PWM timing signal to the H-bridge. The PWM controller controls a dead-time between the first PWM timing signal and the second PWM timing signal based on the at least one property measured by the sensor array.

Description

technical field [0001] The present disclosure relates to radio frequency amplifiers using phase shifted full bridge resonant inverters. In particular, the present disclosure relates to improving the efficiency and dynamic range of radio frequency amplifiers. Background technique [0002] Energy-based tissue therapy is known in the art. Various types of energy (eg, electricity, ultrasound, microwaves, cryogenics, heat, lasers, etc.) are applied to the tissue to achieve the desired result. Electrosurgery involves the application of high radiofrequency currents to a surgical site to cut, ablate, coagulate, or seal tissue. A source or active electrode provides radiofrequency energy from an electrosurgical generator to tissue, and a return electrode carries electrical current back to the generator. In monopolar electrosurgery, the source electrode is usually part of a surgical instrument held by the surgeon and applied to the tissue to be treated, and the return electrode is p...

Claims

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Application Information

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IPC IPC(8): A61B18/12
CPCA61B2018/00684A61B2018/00761A61B2018/1286A61B18/1206H02M1/38Y02B70/10H02M1/0058H02M3/33573H02M3/01H02M3/335H02M3/33523H02M7/4815H02M3/33507A61B2017/0019H02M7/537
Inventor J·H·约翰逊J·A·吉尔伯特
Owner TYCO HEALTHCARE GRP LP