Elimination of tonal acoustic noise in c
โ
Paul G. Handley; Mark Johnson; John T. Boys
๐
Article
๐
1991
๐
Elsevier Science
๐
English
โ 611 KB
A variable speed DC motor drive using pulse width mo&dated (PW:~I) waveforms will emit dominant tonal acoustic noise in addition to the normal motor running noise. These tonal components occur at harmonics of the P WM switching frequency and greatly increase the subjective annoyance of the resulting