Variable speed passenger conveyor and method of operation

Details Variable speed passenger conveyor and method of operation Variable speed passenger conveyor and method of operation

1996-10-29

2000-04-11

Salata, Jonathan

Electricity: motive power systems

Induction motor systems

Primary circuit control

198322, H02P 534

Patent

active

060491892

ABSTRACT:
A control system for a passenger conveyor includes a ready-to-operate mode, a standby speed and a nominal speed. A method to operate the passenger conveyor includes the steps of: transitioning the conveyor from ready-to-operate mode to nominal speed using a frequency converter; switching from frequency converter to line power at nominal speed; switching back to frequency converter if no passengers are present and transitioning from nominal to standby speed; and transitioning from standby speed to ready-to-operate mode if a predetermined amount of time passes without a passenger entering the conveyor.

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patent: 5785165 (1998-07-01), Stahlhut et al.
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