00-182-747
¥999.00
00-102-698
¥999.00
338-089.296
¥999.00
00-114-975
¥999.00
00-113-032
¥999.00
00-119-966
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KUKA 00-113-403
为求得改善，随机PWM方法应运而生。其原理是随机改变开关频率使电机电磁噪音近似为限带白噪音（在线性频率坐标系中，各频率能量分布是均匀的），尽管噪音的总分贝数未变，但以固定开关频率为特征的有色噪音强度大大削弱。正因为如此，即使在IGBT已被广泛应用的今天，对于载波频率必须限制在较低频率的场合，随机PWM仍然有其特殊的价值（DTC控制即为一例）；别一方面则告诉人们消除机械和电磁噪音的方法不是盲目地提高工作频率，因为随机PWM技术提供了一个分析、解决问题的全新思路。
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