1769-OV32T
1769-OV32T
1769-OV32T
为满足DAM 内部有限的空间要求,本模块的管壳设计成85 mm&ti;32 mmx 11.5 mm的尺寸;同时采用可伐4J29作为管壳材料,以保证与管壳陶瓷基板间良好的热匹配及平行缝焊的可行性;采用高温共烧陶瓷绝缘子的引出线方式,保证在机载环境下,与T/R组件的可靠性;壳体与引线镀金,保证了良好的接地及引线的可焊性。另外,为满足内部厚膜管芯电路对气密性的要求,整个管壳完全密封,其密封工艺能达到指标要求。
本模块热设计的宗旨即减小纵向热阻。由于陶瓷基板相比于环氧PCB优良的导热性,我们将开关管、续流管、脉冲调制管等半导体功率元件裸芯片直接压焊在基板上;将功率耦合路径中的磁性元件通过导热胶与基板可靠粘连。由于本模块的输出功率较小,且效率较高,耗散功率有限,在实验及实用过程中,热点分布均匀,并未出现过热
现象,能完全满足DAM 的使用环境要求。同时,为防止在使用过程中环控故障,导致电源过热甚至损坏T/R组件,我们在模块中设计了过热保护,当模块的本体温度上升至100℃ 时,PWM 控制器关闭,断开负载。
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【品牌】Allen-Bradley罗克韦尔、ABB、本特利Bently 3500系统卡件、GE、艾默生西屋等模块卡件
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