Application Types

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Application Types

• Variable Torque
• Constant Torque

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Variable Torque

• Affinity Laws
• Flow is proportional to speed.
• (Flow1 / Flow2) (RPM1)/(RPM2)
• Pressure is proportional to the square of the
  speed.
• (Press1 / Press2) (RPM1)2 / (RPM2)2
• HP is proportional to the cube of the speed.
• (HP1 / HP2) (RPM1 )3/ (RPM2)3

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Variable Torque Curve
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Variable Torque Curve
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Variable Torque - Flow

• Flow is proportional to speed.
• (Flow1 / Flow2) (RPM1) / (RPM2)

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Variable Torque - Pressure
Pressure is proportional to the square of the
speed. (Press1 / Press2) (RPM1)2 / (RPM2)2
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Variable Torque - HP
HP is proportional to the cube of the
speed. (HP1 / HP2) (RPM1)3 / (RPM2)3
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Energy Savings Using VFDs
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Variable Torque Applications

• Centrifugal Fans
• Blowers
• Air Handling Units
• Chillers

• Irrigation Water Pumps
• Downhole Water Pumps
• Submersible Water Pumps
• Domestic Water Pumps
• Centrifugal Sewage Treatment Pumps

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Types of Three Phase AC Motors used on Pumps
Horizontal foot mounted Close coupled Belt
driven Gear reducer
Available in NEMA MG1 Part 30 NEMA MG1 Part 31
Vertical Hollow shaft Solid shaft
Available in NEMA MG1 Part 30 only
Submersible
Specialized winding process
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Single Phase Motors
IMPORTANT NOTICE!!!!!
Single Phase Motor Cannot be used with a VFD
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Three Phase Motorwith THREE Phase Input
T1
L1
T2
L2
T3
L3
VFD is sized by the Full Load Amperage of the
motor.
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Three Phase Motorwith SINGLE Phase Input
T1
L1
T2
T3
L2
Output Voltage is the same as Input Voltage.
VFD is sized by the Full Load Amperage of the
motor multiplied by 1.7 eg. For a 10HP motor
with a FLA of 12 amps. The VFD size would be 12
x 1.7 20.4 amps
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Pump Packaging Options

• Reactors line and load, Harmonic Filters, Sine
  Wave DV/DT Filters
• Disconnect, fusible or non-fusible
• Bypass system, Cam Switch, 2 contactor,
• 3 contactor
• Serial communication HVAC protocols
• Standard and custom door mounted controls any
  combination
• Pre-engineered packages
• Nema 1, Nema 12, Sprinkler Proof and Nema 3R
• Custom engineered packages

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Bypass Package Nema 3R

• Options
• OPE Keypad
• Fusible disconnect
• 3 Contactor Bypass
• Line Reactor
• Load Reactor
• Forced Air Ventilation

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Pump Packages

• Standard Enclosure Options
• Nema 1
• Nema 12
• Nema 3R
• Sprinkler Proof
• Wall Mount
• Floor Mount

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WELLMAX

• A USER FRIENDLY GRAPHICAL TOUCH SCREEN LCD with
  sensible wording for easy operation.Displays
  historical data of TORQUE, AMPS, and RPM
  (standard).You can zoom in out to examine any
  data point of interest.
• An optional memory card will CONSTANTLY STORE
  DATA, which can be retrieved by the user.
• An optional four inch printer will be available
  for on the site printing of information.
• PUMPOFF CONTROL features will prolong the life of
  the pump by monitoring and maintaining an
  approximate FLUID LEVEL.SERIAL port available
  for COMMUNICATION. Optional interface available
  for MODBUS protocols.
• Option - A LOW COST SATELLITE COMMUNICATION
  link, which allows Internet viewing of 10 points
  of information as well as voice call out ability
  on alarm situations for 6 per day.

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WELLMAXCONTROLLER
PUMPOFF CONTROLLER
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Constant Torque Curve
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Constant Torque

• Torque remains constant up to the motor base
  speed.
• HP is proportional to the speed.

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Constant Torque Applications

• Conveyors
• Compressors
• Positive Displacement Pumps
• Crushers
• Mixers
• Etc.

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Positive Displacement Pumps
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Constant Torque Load
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Constant Power Load
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Torque Derating Due to Motor Cooling
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Torque Curve Below Above 60 Hz, Constant Torque
V/F Ratio
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Application Considerations

• Motor voltage, HP FLA specifications
• Load type, constant or variable torque
• Control system requirements
• Serial communication protocol
• Analog and digital input and outputs
• Harmonic considerations
• Nuisance tripping concerns
• Motor insulation protection
• Line load filter options