Vfd
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A variable frequency drive (VFD) controls the speed and torque of an AC electric motor by varying the frequency and voltage of the power supplied to the motor. It does this by drawing AC power from the utility, converting it to DC, and then converting the DC back to a variable AC waveform. VFDs help conserve energy by only providing the power needed based on the motor's load, rather than running the motor at full speed all the time. The document outlines the basic components and operation of a VFD, as well as goals and timelines for designing and building a VFD circuit.
Vfd
- 2. What is a VFD? Variable Frequency Drive (VFD) A VFD can be used to control both the speed and torque of a standard induction AC electric motor. It varies both the frequency and amps of the AC waveform being delivered to the motor saving money in electricity. Basic components of a VFD: Input section, draws AC electric power from the utility, Rectifier section, converts the AC into DC power. Inverter section, converts DC back into a controllable AC waveform.
- 3. Purpose of the VFD VFDs help to limit demand and electrical consumption of motors by reducing the amount of energy they consume. Standard motors are constant speed and when they are energized they run at a 100% no matter the load. Soft Start Only use energy you need
- 4. Ohana Malia - Booster Pump Amps 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 5:00PM 5:00PM 5:00PM 5:00PM 5:00PM 5:00PM 5:00PM 5:00PM Time BoosterPumpAmps New Booster Pumping System Installed
- 6. Potential Problems Improper Circuit Design Harmonic Distortion Safety 3 phase generation Microcontroller programming
- 7. Expectations Learn pulse width modulation techniques Learn application of microcontroller features Learn advanced circuit design Learn AC motor theory Learn energy conservation methods
- 8. Goals Single phase 120V 60 Hz AC generation Three phase 220V 60 Hz AC generation Three phase 220V Variable Frequency AC generation Temperature controlled VFD
- 9. 8/26/2007 9/15/2007 10/5/2007 10/25/2007 11/14/2007 12/4/2007 12/24/2007 1/13/2008 2/2/2008 VFD Circuit Design Programming AC - DC converter DC - DC converter DC - AC inverter Start Done Duration
- 10. 8/26/2007 9/15/2007 10/5/2007 10/25/2007 11/14/2007 12/4/2007 12/24/2007 1/13/2008 2/2/2008 VFD Circuit Design Programming AC - DC converter DC - DC converter DC - AC inverter Start Done Duration