Page 125 - Power Quality in Electrical Systems

108 Chapter Seven

L 1

C
From 2 To
AC line C 1 equipment
C 3
L 2
(a)

Figure 7.9 EMI filters for a single-phase application. (a) The basic circuit. (b) The input
EMI filter and rectifier from the offline flyback supply [7.2].
[© 2002, On Semiconductor, reprinted with permission]

these high-frequency harmonics can adversely affect power quality by
causing electromagnetic interference (EMI). The effects of EMI can be
mitigated by the addition of proper high-frequency EMI filters.

References
[7.1] IEEE, “IEEE Recommended Practices and Requirements for Harmonic Control in
Electrical Power Systems,” IEEE Std. 519-1992, revision of IEEE Std. 519-1981.
[7.2] On Semiconductor, “Very Wide Input Voltage Range, Off-Line Flyback Switching
Power Supply,” Application Note AN1327/D, available from www.onsemi.com.
[7.3] ____, “MC33232 Power Factor Controller” datasheet, available from the Web: http://
www.onsemi.com/pub/Collateral/MC33232.PDF.