Efficiency Optimization of Half-Bridge Series Resonant Inverter with Asymmetrical Duty Cycle Control for Domestic Induction Heating

被引：0
|
作者：
Lucia, O. [1 ]
Burdio, J. M. [1 ]
Millan, I. [1 ]
Acero, J. [1 ]
Llorente, S. [2 ]
机构：
[1] Univ Zaragoza, Dept Ingn Elect & Comunicac, Maria Luna 1, Zaragoza 50018, Spain
[2] Bosch& Siemens Home Appliances Grp, BSH Elect Espana, Zaragoza 50059, Spain
来源：
EPE: 2009 13TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOLS 1-9 | 2009年
关键词：
Induction heating; resonant power conversion; inverter; pulse width modulation; insulated gate bipolar transistor; FREQUENCY;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
In this paper, a method to improve efficiency in half-bridge series resonant inverter applied to domestic induction heating is presented. Low and medium output powers required for this application implies the use of higher switching frequencies, which leads to an efficiency decrease. Asymmetrical duty cycle (ADC) modulation scheme is proposed to improve efficiency due to its switching frequency reduction and absence of additional hardware requirements. Study methodology comprises, in a first step, a theoretical analysis of power balance as a function of control parameters: duty cycle and switching frequency. In addition, restrictions due to snubber and dead time, and variability of the induction loads have been considered. Afterwards, an efficiency analysis has been carried out to determine the optimum operation point. Switching and conduction losses have been calculated to examine global importance of each one for different switching devices. ADC modulation efficiency improvement is achieved by means of a switching frequency reduction, mainly at low-medium power range and low quality factor (Q) loads. The analytical results obtained with this study have been validated through an induction heating test-bench. A discrete 3-kW RL load has been designed to emulate a typical induction heating load. Then, a commercial induction heating inverter is used to evaluate ADC modulation scheme.
引用
收藏
页码：228 / +
页数：2
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