Elevator Controller Runs Motor Over 400 Feet Away
Posted on 27. Jul, 2010 by Admin in Blog, Products, Projects.
When it comes to elevator controllers people call us because we take on the projects that others just won’t or don’t want to. Happy with cookie cutter controllers, if there’s a parameter that is outside the norm they simply can’t see beyond what their equipment is designed to handle.
Some applications that others won’t touch include building controllers that have to be mounted far away from the elevator motor it is controlling, 400 plus feet. I’m happy to report that with the assistance of the G7 Drive from Yaskawa and some pretty clever controller engineering, we’ve been extremely successful with fabricating four G7 Controller projects this past year. Outlined below are the general specs for them.
Job: Refinery – Saudi Arabia – Two issues at hand, heat and the fact that this was an explosion proof application. The client wanted to mount the elevator controller at the bottom of the tower, where they could air condition it and not in the machine room. CJA Controller and Fixtures Provided.
Job: Cement Facility – USA – Again, with two issues at hand, heat and cement dust the best solution was to mount the controller at the bottom floor in a space that could be climate controlled easier. Two units were installed at this location. CJA Controller and Fixtures Provided. This controller is pictured. It also utilized the Allen Bradley PLC and LCD Diagnostic Screen.
Job: Rocket Engine Test Tower – USA – This elevator was a Rack & Pinion Elevator, three motor controls and encoder feedback. The elevator controller needed to be installed at the base of the elevator and had a NEMA 4X Cabinet and air conditioner. CJA Controller and Fixtures Provided.
Long Range VFD Specifications
- Ratings: 0.5 to 150 HP, 240 VAC
0.5 to 500 HP, 480 VAC - Overload capacity: Heavy duty, 150% for 1 minute, 200% peak
- Starting torque: 150% at frequency;
1.0Hz (V/f), 0.5Hz (open loop vector), 0.0Hz (closed loop vector) - Output frequency: 0.01 to 400 Hz
- Output frequency resolution: 0.001 Hz
- Speed control range:
40:1 (V/f), 200:1 (open loop vector), 1000:1 (closed loop vector) - Speed regulation:
1.0% (V/f), 0.2% (open loop vector),
0.01% (closed loop vector) - Speed response: 60 Hz
- Torque response: 300 Hz
- Speed reference resolution:
0.01 Hz with digital reference,
0.03 Hz with analog reference,
0.01 Hz with network reference - Speed/Torque/Position control
- Zero-servo mode
- Adjustable accel/decel: 0.01 to 6000 seconds
- S-Curve: 0.00 to 2.50 seconds, adjustable for each corner
- Stall prevention: Accel / decel / running
- Power loss ride-thru: Auto-restart or inertia ride-thru
When you think about these kinds of projects think about the length that the motor cable must travel. For three out of the four projects listed above the distances were more than twice the travel of the elevator. If you have a unique application that requires a solution that others don’t feel comfortable with providing call us toll free at 1-800-252-1910 for pricing on your next controller project!
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