发明名称 |
System, method, and computer-readable medium for reduction of commutation-related acoustic noise in a fan system |
摘要 |
A method for reducing commutation-related acoustic noise in a fan system is provided. A constant frequency periodic signal is generated and a fan commutation event is synchronized with a zero level value of the constant frequency periodic signal. A system for controlling a direct current fan is provided. The system comprises a signal generator adapted to produce a periodic signal of a constant frequency and a phase-locked loop. A zero level value of the periodic signal is synchronized with a commutation event of the fan.
|
申请公布号 |
US7279857(B2) |
申请公布日期 |
2007.10.09 |
申请号 |
US20030650028 |
申请日期 |
2003.08.27 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
BABB SAMUEL M.;WEAVER JEFFREY S.;YOST JAMES L.;LEE GARLAND E.;PIOTROWSKI PETER M. |
分类号 |
H02P3/08;H02P6/10 |
主分类号 |
H02P3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|