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                      欢迎来到汉得利(常州)电子股份有限公司!阿里商铺 | 收藏本站 | 汉得利动态
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                      当前位置:汉得利电声 > 新闻中心 > 常见问题 >

                      电磁蜂鸣器如何选择?

                      文章出处:汉得利责任编辑:蜂鸣器人气:发表时间:2017-06-15 14:40字体: [ ]

                      电磁式蜂鸣器分为电磁有源蜂鸣器和电磁无源蜂鸣器,

                      有源即为内部带有震荡电路的北京11选5走势图果,只要通以直流电即可发声的,
                      比如BMT1612XH14北京11选5走势图果,这一类电磁式蜂鸣器可以直接用12VDC驱动发声北京11选5走势图果,优点是:驱动简单,直接通12V直流电就可以发声,缺点是:发出的声音缺乏变化,即使是最简单的频率变化也都无法实现;

                      而无源即为内部不带电路,电磁式蜂鸣器的发声靠接入电路输入制定的频率制定占空比的交变信号发声,
                      比如BMT1612H14北京11选5走势图果,区别于有源蜂鸣器就在于型号中少了一个X,这一类电磁式蜂鸣器要接入单向方波才可以发声,如果通以直流电则不发声北京11选5走势图果,优点是:可以根据输入电路不同频率发出不同的声音,缺点是:驱动相对有源蜂鸣器较复杂,要通过PWM脉冲信号来实现发声北京11选5走势图果,还要通过上拉电压维持所需要的驱动电流;

                      两种电磁式蜂鸣器各有优缺点北京11选5走势图果,就要看需要实现什么效果,如果只是简单的警示,可以选择有源蜂鸣器北京11选5走势图果,如果要实现不同的变调的声音,还是建议是用无源蜂鸣器,如您还是有疑问,欢迎您电话:0519-67896271,或者发送邮件到:sales@be-star.com。

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