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2
Series 15H and 18H Applications
Centrifugal Fan – The Baldor inverter is used to adjust the CFM (and associated
pressure) of a fan. Typically, in the past, inlet vanes and outlet dampers have controlled
air flow. These techniques are effective and well accepted, but not very energy efficient.
With the Baldor inverter – vanes, dampers,actuators and their associated maintenance
may be eliminated. Additionally and most importantly, power consumption is decreased
by the cube of the speed decrease. This means a potential for tremendous energy
savings. Simple control of speed through the process follower input allows “closed loop”
control of your air flow. We have also included 3 skip frequencies to avoid those “critical
speed bands” that might cause excessive vibration.
Conveyor – Baldor’s 15H or 18H are the perfect solution to control the speed of a
conveyor. Motor drives are used to reduce setup for different products run on one
conveyor, various processes, different shifts, etc. Control of speed can be with a
potentiometer, a process follower or simple switch closures (with up to 15 preset
speeds)! Built into the control is dynamic braking to allow the operator to “ramp down”
the conveyor speed instead of just coasting down. Also, the 18H control will allow full
torque down to and including zero speed for precise start and stops. We have also
included an “s-curve” for an easy start and landing during acceleration and deceleration.
A great help to keep productivity up, and reduce scrap.
Pump – In Baldor’s tradition of being a value supplier of energy efficient motors –
Baldor’s inverter includes several different “square reduced” volts/hertz curves.
This allows the drive to operate close to the pumps output requirements - an
absolute energy saver for variable flow applications. With the Baldor inverter,
throttling valves can be eliminated and flow controlled from adjustable motor speed.
With the adjustable acceleration time (up to 3600 seconds), water hammer can be
significantly reduced if not entirely eliminated. The mechanical stresses in your pump
and motor will also be greatly reduced. Additionally, inrush current associated with
across-the-line starts can be dramatically reduced. Once again, simple control through
the keypad, potentiometer, or process follower (0 - 10VDC, 0 - 5VDC or 4-20 mA)
input is available.
Mixer – Baldor’s Series 15H inverter and 18H vector drive includes many features that
make it ideal for mixing applications. We include the ability to control speeds through a
process follower, the keypad or switch closures for various speeds. Included is a minimum
speed so the operator cannot turn the speed down below a set value, to keep the mixture
from “setting up”. Adjustable current limit will trip off the drive at a set torque (related to
viscosity) level. High speeds for very fluid materials (up to 7200 rpm or more) are possible!
You can even read current on the keypad and use it as a determination of viscosity.
Packaging Equipment – (Typically constant torque applications) – Baldor’s Series 15H
inverter provides wide constant torque speed ranges with its superior torque boost and
the potential for changing base speed beyond 60 hertz for applied motors. The series
18H vector drive provides superior closed loop motor control for applications requiring
tight speed and torque regulation. The process following feature allows a master
controller to control the entire process. The analog output can be tied into the analog
input of another control for leader/follower applications or use the plug in pulse follower
expansion board for full digital control.
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