请问电感会叫怎么回事?
我在做DC380v转DC120v时的BUCK电路时,电感叫的很大声----嗤嗤的.请问是怎么回事?是电感饱和还是绕线径不够粗.我的电感是电流1.25A,铁心EI33,电感值14mH,饶线是2根直径0.4mm的导线.工作频率30kHz.
请问电感会叫怎么回事?
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@jeffrey
求助:我的PFC电路众的Boost电感也有低频滴沥声?我的PFC电路众的Boost电感也有低频滴沥声,而同一电感和同样的控制器参数在另外控制板上却一切正常.百思不得其解.CCM,Boosttopology,2kw.
Current Loop design
If it usually happens at low line and full load, it means that the current loop is not stable. Because the boost inductance will lose at higher current, you should design the current loop according to the lower inductance instead of no_load inductance.
If it usually happens at low line and full load, it means that the current loop is not stable. Because the boost inductance will lose at higher current, you should design the current loop according to the lower inductance instead of no_load inductance.
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@jeffrey
谢谢wolong先生,关于电流环稳定性.谢谢wolong先生.经测量发现,电感电流在峰值处有振荡.另外,如何判别电流环的稳定性呢?进一步,如何评测CCMBoostPFC的性能呢.谢谢!
Check with the Unitrode application notes
\"Average Current Mode Control of Switching Power Supplies\" for current loop design. And also, make sure that the inductor not saturated at heavy load. Otherwise, there will always be spike current no matter whatever you do with the loop design.
\"Average Current Mode Control of Switching Power Supplies\" for current loop design. And also, make sure that the inductor not saturated at heavy load. Otherwise, there will always be spike current no matter whatever you do with the loop design.
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