共查询到19条相似文献,搜索用时 187 毫秒
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I:GBT感应加热电源以其优异的性能,已在许多工业领域得到应用。本文阐述了IGBT感应加热电源的基本原理和特点;重点分析了IGBT的并联均流问题及C-CL负载特性;给出了应用实例。实例表明,采用C-CL串并联变频式300kW/15kHzIGBT感应加热电源已成功用于东风汽车公司钢板弹簧生产线,应用效果显著。 相似文献
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本文对IGBT超音频感应加热电源设计的有关问题进行了讨论,基于串联谐振电路和晶闸管调压调功方式,采用锁相环和GAL器件进行设计,开发了一种IGBT超音频感应加热电源的控制电路,并介绍了控制电路的主要组成部分和设计特点。 相似文献
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This paper is concerned mainly with a performance analysis and a design method of a newly developed zero-current switching quasi-resonant high-frequency inverter (ZCS-QRI) using a single reverse-blocking power device (high-frequency GATT). As a matter of fact, GATT is replaced by the latest MOS-gate power semiconductor devices, MOSFET, IGBT, MCT and Bi-MOS · GTO thyristor. The frequency-modulated single-ended inverter circuit, which incorporates an auxiliary diode and large reactor cascade branch in parallel with a resonant capacitor connected into the transformer-link series-resonant tuned tank load circuit can stably and efficiently operate in the frequency range from 20 kHz up to 50 kHz or so. It is proved that the ZCS-QRI is more suitable for several kilowatt induction-heating and melting power supplies and high-intensity ultrasonic generator, and switched-mode dc-dc converters. This simple high-frequency ZCS-QRI for induction-heating load model is analyzed introducing normalized resonant and load circuit parameters and control variable on the basis of computer-aided simulation. The load and frequency regulation characteristics of ZCS-QRI and ZCS operating range are illustrated with a normalized expression in addition to voltage and current peak values and stresses of the power semiconductor device. The practical computer-aided design procedure using the inverter characteristics in steady-state expressed in the normalized technique is demonstrated and discussed including a design example. The simulation results of ZCS-QRI are illustrated and compared with the experimental results in trial-produced breadboard. 相似文献
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基于DSP的软开关移相控制100 kHz逆变电源 总被引:1,自引:0,他引:1
研究了一种基于DSP的移相-脉宽调制(Phase-Shifted Pulse Width Modulation,简称PS-PWM)控制100 kHz高频逆变电源:给出了基于IGBT的主电路拓扑结构,并分析了其控制原理;设计了以DSP为核心的控制电路,并给出了其控制程序流程图.采用TMS320F2812型DSP,实现了系统的数字控制和数字锁相环(DPLL)频率跟踪,满足了系统控制的实时性和灵活性.仿真分析和实验结果证明,该逆变器可在大的功率调节和频率变化范围内实现软开关. 相似文献
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在感应加热电源中采用绝缘栅双极晶体管(IGBT)并联扩容时,有并行控制和分时控制两种控制方式,前者已被广泛采用,而后者很少提及.分析表明,采用分时控制不仅能彻底解决并行控制所无法解决的并联IGBT间的电流分配不均衡问题,还能减小IGBT的损耗,提高电源输出功率.给出了采用分时控制时IGBT的工作频率及电流容量选取原则.以半桥串联谐振电路为试验平台,CM75DY-24H为测试对象进行了试验.当输入功率为6 kW时,采用并行控制的输出功率约为采用分时控制的92%,实验结果验证了理论分析的正确性. 相似文献