共查询到20条相似文献,搜索用时 359 毫秒
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数字技术在开关电源控制中的应用和发展 总被引:3,自引:0,他引:3
本文首先介绍了用于电源控制的数字芯片的发展现状,介绍目前用数字芯片实现电源控制的两种方法,并指出这两种方法存在的问题。然后介绍一种用于开关电源的新型控制技术,该技术现在已经开始在一些数字芯片上得到应用,相信将会是未来电源控制技术的发展趋势。 相似文献
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新型单相逆变电源的研制 总被引:1,自引:0,他引:1
介绍了一种新型单相逆变电源的设计方案。该电源将集成电感变压器应用于主电路,消除了传统电源由于输出滤波电感引起的噪音。控制电路以AT89C52和专用SPWM波产生芯片SA4228为核心,实现了全数字化控制。 相似文献
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采用将PWM控制器和MOSFET功率开关自启动电路、功率开关管、PWM控制电路及保护电路一体化的开关电源集成模块芯片是新一代中、小功率开关电源设计的主流发展趋势。电路的高度集成化有助于改善电源的电磁兼容性,极大地提高了电源的效率,简化开关电源的设计和缩短新产品的开发周期。详细阐述了TOP Switch-GX系列芯片的特点,以无线电动钻充电电源为例,介绍了其电路设计的方法,其中着重介绍了运用计算机辅助软件PI Expert进行电源模块设计以及外围电路设计的情况。最后,给出了该开关电源性能测试结果。 相似文献
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TCL S22机芯彩电中主芯片采用超级芯片TMPA8829,电源采用厚膜块STK-W6856,场块采用TDA8177。该机芯彩电易出现电源指示灯亮,自动关机,二次不能雨启动。 相似文献
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9kVA三相航空逆变电源的设计与实现 总被引:3,自引:2,他引:1
设计了一种400Hz三相航空逆变电源。该电源采用单片机80C196KC作为主控芯片;逆变电路采用智能功率模块I(PM),简化了驱动电路;SPWM波的产生由专用集成芯片SA8282独立完成,软硬件实现简单,降低了逆变电路的复杂性;采用数字PI调节,提高了稳态时输出电压的精度和稳定性。9kVA的样机试验表明,该逆变电源的输出波形品质良好,输出电压稳定,能满足性能要求。 相似文献
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Eid A. El-Kishky H. Abdel-Salam M. El-Mohandes M.T. 《Power Delivery, IEEE Transactions on》2010,25(1):55-65
In this paper, a comprehensive model of the variable-speed constant-frequency aircraft electric power system is developed to study the performance characteristics of the system and, in particular, the system power quality over a frequency range of operation of 400 Hz to 800 Hz. A fully controlled active power filter is designed to regulate the load terminal voltage, eliminate harmonics, correct supply power factor, and minimize the effect of unbalanced loads. The control algorithm for the active power filter (APF) is based on the perfect harmonic cancellation method which provides a three-phase reference supply current in phase with its positive-sequence fundamental voltage. The proposed APF is integrated into the model of a 90-kVA advanced aircraft electric power system under VSCF operation. The performance characteristics of the system are studied with the frequency of the generator's output voltage varied from 400 Hz to 800 Hz under different loading conditions. Several case studies are presented including dc loads as well as passive and dynamic ac loads. The power quality characteristics of the studied aircraft electric power system with the proposed active filter are shown to be in compliance with the most recent military aircraft electrical standards MIL-STD-704F as well as with the IEEE Std. 519. 相似文献
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Jinzenji Toshimasa Moriya Fumiyasu Kanzaki Takamasa Azuma Makoto 《Industry Applications, IEEE Transactions on》1981,(2):179-189
The electrical design, characteristics, construction, and test results of a 170-kVA static power supply using 2500-V 600-A gate turn-off (GTO) thyristors developed for a wide range of electric railway applications are discussed. This power supply is principally composed of a thyristor chopper at an elementary frequency of 360 Hz and three-phase gate turn-off thyristor inverters in the form of a twelve-phase bridge configuration. It is capable of stabilizing a 60-Hz ac voltage and twelve-phase waveform. The bulk and weight of this power supply are ascribed to the avoidance of an inverter commutating circuit, which contains parasitic thyristors, capacitors, and inductances. The applied strategy is derived from the trend of the state of the art regarding switching cells and commuter trains. 相似文献
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针对三相四线制静止式中频电源负载短路时功率器件极易损坏,传统的短路保护方法不能抑制短路瞬间快速上升的短路电流,且会造成负载供电断续等问题,在对传统短路限流保护加以改进的基础上,提出了一种软硬件协同控制的短路限流保护方法。为了抑制短路电流的快速上升,该方法运用固态断路器过零点瞬时关断的能力,采用短路限流值及短路电流瞬态变化率双重判断条件。结合短路时切换为恒流源控制的手段,克服了电力电子设备瞬时过载能力弱的缺点。实验结果证明了该方法可以保证短路故障的迅速切除及负载的持续供电。 相似文献
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400Hz中频电源复合控制策略研究 总被引:1,自引:1,他引:0
提出一种基于重复控制和多环反馈控制的复合控制方法,该方法可以提高用于400Hz中频电源中的单相恒压恒频PWM逆变器的动态和稳态响应。其中,重复控制器用于在稳态情况下产生高质量的输出电压。多环反馈控制器则用来改善系统的动态特性。该控制策略已在一台基于DSP全数字控制400Hz中频电源装置上得到了验证。 相似文献
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