Application Types Variable Torque Constant Torque

(Flow1 / Flow2) = (RPM1)/(RPM2) 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

Variable Torque Curve

Region of intermittent Variable Torque Curve 60 120 200% 100% 63% (Typical) Torque Continuous torque capability Speed in Hertz Region of continuous operation Region of intermittent Peak torque Load torque Requirement

(Flow1 / Flow2) = (RPM1) / (RPM2) Variable Torque - Flow Flow is proportional to speed. (Flow1 / Flow2) = (RPM1) / (RPM2)

Variable Torque - Pressure Pressure is proportional to the square of the speed. (Press1 / Press2) = (RPM1)2 / (RPM2)2

HP is proportional to the cube of the speed. Variable Torque - HP HP is proportional to the cube of the speed. (HP1 / HP2) = (RPM1)3 / (RPM2)3

Energy Savings Using VFD’s

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

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

Cannot be used with a VFD Single Phase Motors IMPORTANT NOTICE!!!!! Single Phase Motor Cannot be used with a VFD

Three Phase Motor with THREE Phase Input L1 T2 L2 T3 L3 VFD is sized by the Full Load Amperage of the motor.

Three Phase Motor with SINGLE Phase Input 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

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

Bypass Package Nema 3R Options OPE Keypad Fusible disconnect 3 Contactor Bypass Line Reactor Load Reactor Forced Air Ventilation

Pump Packages Standard Enclosure Options: Nema 1 Nema 12 Nema 3R Sprinkler Proof Wall Mount Floor Mount

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.

WELLMAX CONTROLLER PUMPOFF CONTROLLER

Constant Torque Curve

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

Constant Torque Applications Conveyors Compressors Positive Displacement Pumps Crushers Mixers Etc.

Positive Displacement Pumps

Constant Torque Load

Constant Power Load 60 100 200% 100% 63% Field weakening region Peak torque capability provided that the AC drive has adequate overload capability Torque (Typical) Continuous torque capability limited by motor cooling Speed in Hertz Region of continuous operation Region of intermittent Load torque requirement

Torque Derating Due to Motor Cooling

Torque Curve Below & Above 60 Hz, Constant Torque V/F Ratio

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