EP 0867061 A1 19980930 - POWER SUPPLY FOR NON-LINEAR LOADS
Title (en)
POWER SUPPLY FOR NON-LINEAR LOADS
Title (de)
STROMVERSORGUNG FÜR NICHTLINEARE LASTEN
Title (fr)
ALIMENTATION ELECTRIQUE POUR CHARGES NON LINEAIRES
Publication
Application
Priority
- SE 9601539 W 19961126
- SE 9504342 A 19951205
Abstract (en)
[origin: WO9721264A1] The invention relates to a power supply for non-linear loads (2), such as high pressure sodium lamps in greenhouses or road lighting. Non-linear loads connected between phase (R, S, T) and neutral (N) generate third harmonic currents causing losses and temperature rise in for example conductors and transformers. To reduce the third harmonic current a zero-inductor (6) is inserted either with one winding on a common core in series with each of the phase conductors, or just one winding in series with the neutral conductor. In a preferred version the conductors (R, S, T or N) are threaded through the core forming single-turn windings. In a further development of the invention the core is fitted with an air gap (9) and a multi-turn winding (8) connected to a capacitor (7), which together with the zero-inductor constitute a parallel resonant filter tuned to a frequency in the vicinity of that of the third harmonic.
IPC 1-7
IPC 8 full level
H05B 41/16 (2006.01)
CPC (source: EP)
H05B 41/16 (2013.01); H01F 27/34 (2013.01)
Citation (search report)
See references of WO 9721264A1
Designated contracting state (EPC)
AT BE CH DE DK FR GB LI NL
DOCDB simple family (publication)
WO 9721264 A1 19970612; AU 1045397 A 19970627; EP 0867061 A1 19980930; JP 2000501878 A 20000215; SE 515520 C2 20010820; SE 9504342 D0 19951205; SE 9504342 L 19970606
DOCDB simple family (application)
SE 9601539 W 19961126; AU 1045397 A 19961126; EP 96941260 A 19961126; JP 52119497 A 19961126; SE 9504342 A 19951205