EP 1290780 A2 20030312 - METHOD FOR BOOSTING THE OUTPUT VOLTAGE OF A VARIABLE FREQUENCY DRIVE
Title (en)
METHOD FOR BOOSTING THE OUTPUT VOLTAGE OF A VARIABLE FREQUENCY DRIVE
Title (de)
VERFAHREN ZUR ERHÖHUNG DER AUSGANGSSPANNUNG EINES FREQUENZVERÄNDERBAREN ANTRIEBES
Title (fr)
PROCEDE PERMETTANT D'ELEVER LA TENSION DE SORTIE D'UN MECANISME D'ENTRAINEMENT A FREQUENCE VARIABLE
Publication
Application
Priority
- US 0115249 W 20010511
- US 20379200 P 20000512
- US 20481800 P 20000517
Abstract (en)
[origin: WO0189068A2] A sine wave filter including an inductor for each phase (three inductors) and three delta- or Y-connected capacitors is employed within a borehole power system, coupled within a three phase power system at the surface between the output of a variable frequency drive and a three phase power cable transmitting power to a borehole location, and boosts the output voltage of the drive. The sine wave filter is designed to have a resonant frequency higher than the maximum operational frequency of the drive, and a Q such that, at the maximum operational frequency of the drive, the filter provides a voltage gain equal to the ratio of the desired voltage to the drive's maximum output power at the maximum operational frequency. The sine wave filter also smooths the voltage waveform of a pulse width modulated variable frequency drive.
IPC 1-7
IPC 8 full level
E21B 43/12 (2006.01); F04B 47/06 (2006.01)
CPC (source: EP US)
E21B 43/128 (2013.01 - EP US); F04B 47/06 (2013.01 - EP)
Citation (search report)
See references of WO 0189068A2
Designated contracting state (EPC)
CH DE FI LI
DOCDB simple family (publication)
WO 0189068 A2 20011122; WO 0189068 A3 20020314; AU 6144001 A 20011126; CA 2408795 A1 20011122; CA 2408795 C 20051122; DE 60139865 D1 20091022; EP 1290780 A2 20030312; EP 1290780 B1 20090909
DOCDB simple family (application)
US 0115249 W 20010511; AU 6144001 A 20010511; CA 2408795 A 20010511; DE 60139865 T 20010511; EP 01935337 A 20010511