Different Between Geared AC VV High Mass & Low Massgreenspun.com : LUSENET : Elevator Problem Discussion : One Thread
Special Thank's to Don Vollrath (email@example.com) & John Brannon (akaelevman@AOL.com) for your responded to my question about to correlation between load weight and energy
I have another question, I want to know what the different between Geared AC VV High Mass & AC VV Low Mass, how can I determine which type of drive being installed at the building, because on the elevator brochure the only information was Variabel-Voltage Variable-Frequency (VVVF), Just for your information the type of elevator for my research is Mitsubishi PC15-CO (rated speed 90m/s & 105m/s)
-- Rudy Setiawan (firstname.lastname@example.org), July 18, 2000
varible voltage varible frequency is done by converting ac to dc then back to synthetic ac so the sign wave is slowed therefore the rotation of the armature is slowed due to saturation of the motor field they are sized according to horse power and the waste is burned off in resistors or sent back into the line depending on manufacturer as for low and high mass ive never heard that term used in vvvf drives but to say they dont make them
-- (email@example.com), July 25, 2000.