Variable Frequency Drives - Wire-Setup-Troubleshoot VFDs

This course covers all aspects of working with modern variable frequency drives (VFDs).

Generic terms that apply to all VFD manufacturers are covered. Wiring, programming and commissioning of different manufacturers are covered. In depth VFD setup is covered using professional drive commissioning software that is included free in the course. The student can follow along and adjust parameters using the software. Also included and demonstrated is VFD simulation software that replicates exactly the front panel buttons of a modern VFD. The student is walked through the steps of setting up a drive and important points learned over the years are covered. Periodic inspection and maintenance of VFDs and electric motors is covered. The tasks involved in maintaining and troubleshooting equipment are covered.

Other important information covered in the course include:

• Working safely with VFDs and the hazards associated with VFD commissioning

• VFD power and control wiring

• Line, load and DC link reactors

• The DC bus

• Sink & source wiring

• VFD digital and analog inputs and outputs

• VFD motor braking

• Inverter rated motors

• Motor turn down ratios

• Basic VFD theory of operation

• Basic Motor theory of operation

• Constant torque and variable torque modes

• Volts per hertz ratios

• Pump & fan applications

• Auto-tuning

• VFD wiring schematics are explained and demonstrated with design software

• 2-wire control transition and run at power up

• 3- wire control with forward and reverse