1 / 27

Application Types

Variable Torque Constant Torque. Application Types. Affinity Laws: Flow is proportional to speed. (Flow 1 / Flow 2 ) = (RPM 1 )/(RPM 2 ) Pressure is proportional to the square of the speed. (Press 1 / Press 2 ) = (RPM 1 ) 2 / (RPM 2 ) 2 HP is proportional to the cube of the speed.

kura
Download Presentation

Application Types

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Variable Torque Constant Torque Application Types

  2. 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

  3. Variable Torque Curve

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

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

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

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

  8. Energy Savings Using VFD’s

  9. Irrigation Water Pumps Downhole Water Pumps Submersible Water Pumps Domestic Water Pumps Centrifugal Sewage Treatment Pumps Variable Torque Applications • Centrifugal Fans • Blowers • Air Handling Units • Chillers

  10. 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

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

  12. Three Phase Motorwith THREE Phase Input T1 L1 T2 L2 T3 L3 VFD is sized by the Full Load Amperage of the motor.

  13. 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

  14. 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 Pump Packaging Options

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

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

  17. 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.

  18. WELLMAXCONTROLLER PUMPOFF CONTROLLER

  19. Constant Torque Curve

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

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

  22. Positive Displacement Pumps

  23. Constant Torque Load

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

  25. Torque Derating Due to Motor Cooling

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

  27. 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 Application Considerations

More Related