【作者】 李勇；

【导师】 李文江；

【作者基本信息】 辽宁工程技术大学 ， 电力电子与电力传动， 2015， 硕士

【摘要】 随着科技的进步以及电力电子技术的发展,以碳化硅(SIC)为主的第三代半导体材料制作的电力电子器件正逐渐走向商用。其高的操作温度及开关频率,高的耐压等级,短的开关时间和低的通态损耗。为感应加热电源新拓扑的设计提供了可能。感应加热技术的发展,要求高输出功率水平同时减少外围电路,适应大的负载变换和降低成本。经典的解决方案是AC-DC-AC组合,但效率和成本仍有改善空间。本文提出一种直接AC-AC变换器,以减少元件的数量,降低成本,提高可靠性,并提高效率。提出的变换器是电压源串联谐振变换器,通过文中的调制策略可以实现线性输出功率控制,减少控制复杂性。此外,该变换器在导通和关断过程中实现软开关,进一步提高了效率。采用Saber仿真及样机制作,对一个2.6KW的变换器进行了验证,仿真和实验结果验证了方案的可行性和预期的性能。更多还原

【Abstract】 With the advancement of technology and the development of power electronics technology, the power electronic devices produced by Silicon carbide are gradually becoming commercially available. It manufactured power electronic devices with high blocking voltage, high frequency and high temperature resistant capability is strong, but also has a small switching losses and low on-state resistance advantages. Such devices for induction heating power design offer possibilities with new topology.Induction-heating technology requires specific features such as high output power levels in a reduced enclosure, large load variation and reduced cost. Classical solutions are based on the combination of AC-DC-AC, but there is still room for efficiency and cost improvements. This paper proposes a direct ac-ac converter to reduce the component count, reduce cost, improve reliability, and increase efficiency. The proposed converter is a voltage-source series-resonant converter, Through the paper of the modulation strategy can achieve linear output power control, reducing control complexity. Moreover, the proposed converter achieves soft switching during both turn-on and turn-off transitions, further improving the efficiency. The simulation and prototype of the 2.6-kW converter has been carried out, verifying the feasibility of the proposal and the expected performance.更多还原