1976 |
44XL Machine Tool AC Drive purchased for experimentation by Otis Elevator Company. |
1977 |
3400 DC Drive used as basis for proprietary drive for Otis Elevator Company. |
1980 |
3412 DC Drive used as basis for improved Otis Elevator Company Drive. |
1983 |
3412 DC Drive provided to Computerized Elevator Control Corp. and Dover Elevator, Inc. |
1989 |
Proprietary digital DC drive designed and built for Otis Elevator Company. |
1992 |
DSD 312 all digital systems DC Drive modified for Dover Elevator, Inc. |
1994 |
DSD 412 all digital non-proprietary elevator DC drive introduced with Otis Elevator Company. |
1995 |
GPD 503 standard V/F drive and VCD 703 closed-loop AC dives utilized on elevator applications. |
1997 |
DSD 412 DC Drive now used by Otis Elevator Company, Schindler Elevator Corp., Dover Elevator, Inc., Thyssen Elevator and most control OEMs. GPD 515 Standard AC Drive applied to low performance hoistway. |
1998 |
HPV 900 Vector AC Drive, designed specifically for high performance elevator applications, introduced. |
1999 |
HPV 100 Soft Starter for
Hydraulic Elevators introduced. |
2000 |
DSD 412 DC Drive approaches 90% market share. |
2002 |
HPV 600 AC Elevator drive introduced as the world's first open-loop drive control designed specifically for elevators. |
2006 |
Quattro® Elevator
Drive introduced using IGBT technology on DC motor. |
|
|
