vvvf drivesgreenspun.com : LUSENET : Elevator Problem Discussion : One Thread
I have been involved in the application of vvvf technology in the lift industry for a while now, and have had promising results grafting vvvf drives onto existing 2-speed ac systems. The drive I favour is manufactured in New Zealand by PDL, now a subsidiary of SCHNEIDER ELECTRIC With careful design a ride rivalling that of a purpose designed vvvf control system can be achieved in around 1 week by one person.(a VERY cheap mod.)
-- mark lennon (email@example.com), August 17, 2002
-- john m (firstname.lastname@example.org), August 18, 2002.
Yeah anything cheap might last the warranty period if its lucky....what about tech backup etc.....weve heard it all before mate
-- dayle (email@example.com), November 05, 2002.